| Entries |
| Document | Title | Date |
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| 20080312798 | Use of torque converter pump clutch to eliminate vibration jolt in a vehicle transmission - The present invention is a method of engaging a drive gear in a vehicle transmission having a torque converter that reduces the sudden vibration jolt that often accompanies engagement of a drive gear from a neutral position, such as Park or Neutral. The method includes sensing brake pedal depression, detecting shifting from a neutral gear to a drive gear, disengaging a pump clutch in the torque converter, with the pump clutch connecting a pump in the torque converter with a torsional input, such as from an engine, into the torque converter, and gradually engaging the pump clutch, with the gradual engagement occurring after a predetermined period of time after said gear lever shift movement has stopped. Also disclosed is a system that enables operation of the method. | 12-18-2008 |
| 20090018737 | METHOD FOR CONTROLLING A VEHICLE EQUIPPED WITH A MECHANICAL SERVO TRANSMISSION - A method for controlling a vehicle presenting the steps of: verifying, at starting of an internal-combustion engine, whether a memory of calibrations contains the function of transmissibility of a clutch and/or the effective positions of engagement and selection of the gears in a gearchange; sending to the driver, if the memory of calibrations does not contain the function of transmissibility of the clutch and/or the effective positions of engagement and selection of the gears in the gearchange, a signal of start of a first self-calibration step, during which the driver must leave the internal-combustion engine turned on and the vehicle stationary; selecting and engaging a number of times, during the first self-calibration step, all the gears of the gearchange autonomously from the driver for determining the effective positions of engagement and selection of the gears in the gearchange; disengaging and engaging, during the first self-calibration step, the clutch with the gearchange in neutral and autonomously from the driver for determining a point of start of engagement of the clutch; and sending to the driver, at the end of the first self-calibration step, a signal of end of the first self-calibration step. | 01-15-2009 |
| 20090055063 | AUTOMATIC GEAR CONTROL DEVICE - An ECU executes a program including: a step (S | 02-26-2009 |
| 20090069991 | VEHICLE DRIVE CONTROL DEVICE - A vehicle device control device includes an automatic drive control device for executing an automatic drive control by controlling at least a driving torque generating device, which applies a driving torque on a vehicle, so that a vehicle speed reaches a preset target vehicle speed, and a shift position determination portion for determining a shift position of a gear lever of the vehicle, wherein in a case where the shift position determination portion determines that the gear lever is set at a neutral position on the basis of a determination result of the shift position determination portion while the automatic drive control is executed, the automatic drive control device controls the driving torque generating device so that the driving torque applied to the vehicle becomes zero while continuously executing the automatic drive control. | 03-12-2009 |
| 20090112422 | METHOD AND APPARATUS TO CONTROL LOGIC VALVES FOR HYDRAULIC FLOW CONTROL IN AN ELECTRO-MECHANICAL TRANSMISSION - A method for controlling an electromechanical transmission includes monitoring a current hydraulic circuit oil temperature, monitoring a current state of flow management valves, monitoring a command for cooling of electric machines, monitoring a desired transmission operating range state, utilizing a state machine to determine a sequence for controlling positions of the flow management valves to achieve the desired transmission operating range state based upon the monitored properties. | 04-30-2009 |
| 20090112423 | METHOD AND APPARATUS TO CONTROL OPERATION OF A HYDRAULIC PUMP FOR AN ELECTRO-MECHANICAL TRANSMISSION - A method for controlling a hydraulic flow within a powertrain comprising an electromechanical transmission mechanically-operatively coupled to an engine adapted to selectively transmit power to an output, wherein the transmission utilizes a hydraulic control system serving a number of hydraulic oil consuming functions includes monitoring minimum hydraulic pressure requirements for each of the functions, determining a requested hydraulic pressure based upon the monitoring minimum hydraulic pressure requirements and physical limits of the hydraulic control system including a maximum pressure, determining a desired flow utilizing a hydraulic control system flow model based upon the requested hydraulic pressure, and utilizing the desired flow to control an auxiliary hydraulic pump. | 04-30-2009 |
| 20090118953 | FLUID SUPPLY DEVICE AND FLUID SUPPLY METHOD OF FLUID COUPLING - An ECU executes a program including outputting, when the oil temperature THO of ATF| 05-07-2009 | |
| 20090118954 | METHOD FOR MONITORING AN AUXILIARY PUMP FOR A HYBRID POWERTRAIN - A powertrain system includes a hybrid transmission coupled to an engine and an auxiliary hydraulic pump. The auxiliary hydraulic pump is commanded to operate at a predetermined speed only when enable criteria are met. An engine-off state is inhibited based upon a difference between a commanded speed and a monitored operating speed of the auxiliary hydraulic pump. | 05-07-2009 |
| 20090125200 | CONTROL SYSTEM FOR A TORQUE TRANSMITTING DEVICE IN AN AUTOMATIC TRANSMISSION - A control system for controlling a torque transmitting device in a transmission includes a controller, a plurality of solenoids, and a valve assembly. The valve assembly has a plurality of signal control areas in communication with the solenoids that are used to control the torque transmitting device to provide multiple gains of torque transmission. | 05-14-2009 |
| 20090171545 | Control device for automatic transmission - An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip. | 07-02-2009 |
| 20090192685 | Method of Operating a Transmission Auxiliary Pump - A method of controlling an auxiliary pump for use with a transmission in a vehicle is provided, the vehicle having a system voltage/current. The method comprises: determining an optimal auxiliary pump start voltage/current; determining if the system voltage/current is less than the optimal auxiliary pump start voltage/current; if yes, determining if the auxiliary pump is in a start-mode and if a predetermined override condition has been met; determining if the actual auxiliary pump speed is less than a desired auxiliary pump speed if the auxiliary pump is in the start-mode; if not, determining if the auxiliary pump is in an on-state; and, increasing an actual auxiliary pump voltage/current to equal the optimal auxiliary pump start voltage/current if the actual auxiliary pump speed is less than the desired auxiliary pump speed or the predetermined override condition has been met. | 07-30-2009 |
| 20090254255 | Dynamic pressure control system with solenoid valve command current trimming - A dynamic pressure control system, such as a transmission pressure control system, is provided wherein one or more of electrical current command signals provided to a pressure control solenoid valve, such as a fast response variable force solenoid pressure control valve, are progressively trimmed in a manner to improve overall system pressure control performance by improving the overall commanded current response. The invention permits use of fast response pressure control solenoid valves and obtainment of in a manner to minimize overshoot and improve steady state accuracy, so as to thereby improve precision pressure control. | 10-08-2009 |
| 20090254256 | TRANSMISSION OIL MEASUREMENT SYSTEM AND METHOD - A system includes a pressure sensor that measures a transmission fluid pressure at a first fluid cavity of a transmission. A transmission control module receives the transmission fluid pressure, determines a transmission fluid temperature in the first fluid cavity based on the transmission fluid pressure, and controls the transmission fluid pressure based on the transmission fluid temperature. | 10-08-2009 |
| 20090271081 | CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - A control device for an automatic transmission is disclosed wherein a shift point depending on a variation in vehicle acceleration is modified on a real time basis in accordance with not only a corrected result on a shift point depending on piece-to-piece variations of automatic transmissions, but also actual acceleration for shortening a time required for learning with high precision with no need to be matched. Shift point real-time modifying means is provided for modifying the altered shift point based on a value of a ratio between a value of actual engine-rotation acceleration at an upshift-determining timing during a power-on running and a value of reference engine-rotation acceleration obtained by substituting a value of actual engine-rotation acceleration to a value for a reference running state having no impact on acceleration of a vehicle, and a target maximum engine rotation speed. | 10-29-2009 |
| 20090306868 | HYDRAULIC CONTROL DEVICE AND METHOD FOR AUTOMATIC TRANSMISSION - There is provided a hydraulic control device for controlling a hydraulic pressure supplied to a vehicle start-up engagement element in an automatic transmission when a shift lever is moved from a non-drive range position to a drive range position. The hydraulic control device has a target pressure setting section that sets, based on an input torque of the automatic transmission, a target value of hydraulic pressure supplied to the vehicle start-up engagement element at the completion of engagement of the vehicle start-up engagement element and corrects the target value periodically based on the transmission input torque until the completion of engagement of the vehicle start-up engagement element and a hydraulic pressure control section that controls the hydraulic pressure in such a manner that the hydraulic pressure supplied to the vehicle start-up engagement element reaches the corrected target value at the completion of engagement of the vehicle start-up engagement element. | 12-10-2009 |
| 20090312927 | CONTROL APPARATUS AND CONTROL METHOD FOR VEHICLE MOUNTED WITH AUTOMATIC TRANSMISSION - An ECU executes a program including the steps of: determining whether or not the conditions for execution of low-temperature neutral control: the temperature of the automatic transmission hydraulic fluid is at most a threshold value; the shift position is D or R position; the vehicle speed is zero; and the brake is ON and the vehicle is stopped, are continuously satisfied for a period of time represented by a threshold value; executing the neutral control when the conditions for execution of low-temperature neutral control are continuously satisfied for at least the period represented by the threshold value; returning from the neutral control when the conditions for execution of low-temperature neutral control are not satisfied; and restricting the throttle opening position in returning from the neutral control. | 12-17-2009 |
| 20090319143 | UP-SHIFT CONTROL IN AN AUTOMATIC TRANSMISSION WITH NEGATIVE INPUT TORQUE - A transmission control module including a shift control module that generates an enable signal when an up-shift is requested and the engine torque is below a threshold torque value. A turbine speed profile determination module that selectively generates a desired turbine speed profile. The shift control module controls a clutch pressure of an off-going clutch based on a measured turbine speed and the desired turbine speed profile when the enable signal is generated. | 12-24-2009 |
| 20100076654 | TORQUE SENSOR BASED VEHICLE DIRECTION DETERMINATION - A control system of a vehicle comprises a torque sensor, a vehicle direction module, and a control module. The torque sensor determines a driveline torque signal based on a torque produced by a device of a driveline. The vehicle direction module determines whether a vehicle direction includes one of a forward direction and a reverse direction based on the driveline torque signal. The control module controls the vehicle based on the vehicle direction. | 03-25-2010 |
| 20100087997 | CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION - A transmission controller determines whether an oil temperature in the CVT is higher than a high oil temperature control starting temperature or not. If it is determined that the oil temperature is higher than the high oil temperature control starting temperature, a first oil temperature lowering processing which limits an input rotation speed of the CVT by changing a speed ratio of the CVT smaller is executed. If the input rotation speed of the CVT reaches a predetermined lower limit rotation speed during execution of the first oil temperature lowering processing, the first oil temperature lowering processing is ended and a second oil temperature lowering processing that limits a torque of an engine is executed. | 04-08-2010 |
| 20100100292 | ENGINE SERVO LOADING DEVICE AND CONTROL METHOD FOR DYNAMIC OPTIMIZATION SEARCHING OPERATION OF THE DEVICE - A dynamic optimization searching method for a torque servo loading device of an engine is disclosed, the torque servo loading device includes a motor, a torque servo driver, a primary control unit, and a mass flow sensor; the primary control unit stores therein an optimal efficiency operation curve of the engine and data of fuel consumption value per unit of mechanical power of the engine at each point on the curve; the method includes: detecting current operation parameters of the engine; making the engine operate according to the current optimal efficiency operation curve; changing the current optimal fuel efficiency torque by an optimization searching step to obtain an optimization searching torque; making the engine operate for an optimization searching measurement-calculation time period under the optimization searching torque; calculating the fuel consumption value per unit of mechanical power of the engine; comparing the calculated fuel consumption value per unit of mechanical power with a stored fuel consumption value per unit of mechanical power; and storing the optimization searching torque in the optimal efficiency operation curve, and storing the calculated fuel consumption value per unit of mechanical power, if the calculated fuel consumption value per unit of mechanical power is less than the stored fuel consumption value per unit of mechanical power. | 04-22-2010 |
| 20100106383 | METHOD FOR CONTROLLING AN AUTOMATIC TRANSMISSION OF A MOTOR VEHICLE IN THE BRAKING PHASE - A method for controlling an automatic gearbox pertaining to a motor vehicle in a braking phase. According to the method, a gear ratio or speed value of the gearbox, requested on the basis of pre-established laws, is determined; and, on the basis of the value and parameters representative of the situation of the vehicle, a corrected gear ratio or speed value of the gearbox, able to trigger an anticipated downshifting of the automatic gearbox, is determined. The corrected gear ratio value of the gearbox is determined on the basis of an estimation of the desired primary speed for the automatic gearbox. | 04-29-2010 |
| 20100121545 | METHOD FOR OPERATING A TRANSMISSION - The invention relates to a method for operating a transmission, especially an automatic transmission, comprising a dry starting clutch. Said starting clutch is especially configured as a friction clutch and a characteristic value is determined during operation in defined operating points, said value being indicative of the state of wear of the starting clutch. The method according to the invention is characterized by comparing a newly determined characteristic value with a characteristic value previously determined in a previous operating point. If the newly determined characteristic value deviates from the previously determined characteristic value to such an extent that it suggests a reduced wear of the starting clutch, it is assumed that the starting clutch has been replaced and a wear indicator of the starting clutch is reset in a defined manner. | 05-13-2010 |
| 20100131163 | HYDRAULIC VEHICLE - A hydraulic vehicle provided with a running-system hydraulic unit | 05-27-2010 |
| 20100191430 | CONTROL DEVICE AND CONTROL METHOD FOR VEHICLE - An ECU executes a program that includes: a step of outputting a shift stage after a power-on down shift; a step of, when a turbine rotation speed NT does not increase to a synchronized rotation speed corresponding to the shift stage after the shift after an accelerator is deactivated, executing sweep control; and a step of, in a state that the shift stage after the shift is not formed, when the accelerator is activated, executing sweep control. | 07-29-2010 |
| 20100299033 | METHOD FOR CONTROLLING PUMP TRANSITIONS IN A MULTI-MODE HYBRID TRANSMISSION - A method of controlling a pump for a hybrid transmission includes commanding a first line pressure of the transmission and deriving a first torque value—an open-loop torque value—from the first line pressure command, and commanding the pump to operate at the first torque value. The method monitors actual speed of the pump and derives a second torque value—a closed-loop torque value—therefrom. A third torque value is derived from the first and second torque values, and the pump commanded to operate at the third torque value. A first speed value may be derived from the first line pressure command, and the second torque value derived from the difference between the monitored and the first speed values. Deriving the third torque value may include a substantially-linear combination of the first and second torque values. | 11-25-2010 |
| 20110004383 | METHOD FOR MONITORING A DRIVE TRAIN - A method for monitoring an automated drive train of a motor vehicle, in particular of a passenger car. The drive train comprises a drive engine, a friction clutch arrangement and a multi-speed transmission. The friction clutch arrangement connects or disconnects the drive engine to/from the multi-speed transmission. The method comprises the step of determining at least one rotational speed parameter of the drive train; checking whether the rotational speed parameter is greater than a first threshold value for a first predetermined time interval, and initiating a measure in the drive train in order to lower the rotational speed parameter if the rotational speed parameter is greater than the first threshold value for the first predetermined time interval. | 01-06-2011 |
| 20110040462 | METHOD FOR CONTROLLING A TRANSMISSION OF A MOTOR VEHICLE - A method for controlling a motor vehicle transmission ( | 02-17-2011 |
| 20110054751 | CONTROL DEVICE AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - A control device for an automatic transmission having a torque converter includes: a determining means for determining whether to set a friction element in an engaged condition or a disengaged condition on the basis of an operating condition of a vehicle; a control means for outputting an engagement command or a disengagement command on the basis of a determination result of the determining means; and an oil pressure control means for performing control to engage the friction element upon reception of the engagement command by performing a precharge control for the friction element and then controlling the supplied oil pressure to a predetermined oil pressure and to disengage the friction element upon reception of the disengagement command by draining the oil pressure supplied to the friction element, wherein the control means comprises a prohibiting means for prohibiting output of the disengagement command in relation to the friction element following control of the friction element from the disengaged condition to the engaged condition until a predetermined condition is established. | 03-03-2011 |
| 20110066340 | METHOD AND DEVICE FOR SECURING LUBRICATION OF AN AUTOMATED MANUAL TRANSMISSION IN A VEHICLE - A method and device are provided for securing lubrication of an automated manual transmission, AMT, in a vehicle, when towing the vehicle, and where a transmission lubrication system is drivingly connected to and driven by rotation of an intermediate shaft of the AMT. The following steps can be executed in mentioned order and starting from when ignition of the vehicle is switched on: registering a signal that towing of the vehicle is demanded, disengaging all gears that are arranged to drivingly engage or disengage an input shaft to the intermediate shaft of the automated manual transmission, and engaging one gear that is arranged to drivingly engage or disengage the intermediate shaft to an output shaft of the automated manual transmission. | 03-17-2011 |
| 20110087410 | MOTOR VEHICLE WITH INSERTABLE FOUR-WHEEL DRIVE - A motor vehicle with insertable four-wheel drive, including an engine having a crankshaft, a pair of main driving wheels constantly connected to the crankshaft by interposition of a gearbox provided with a first clutch, and a pair of secondary driving wheels, which may be connected to the crankshaft by an insertable transmission system. The insertable transmission system presents a second clutch, which is connected on one end with a fixed transmission ratio to the crankshaft upstream of the gearbox and on the other end with a fixed transmission ratio to the secondary driving wheels. A percentage of motive torque to be transmitted to the secondary driving wheels by the second clutch is determined according to dynamic parameters of the motor vehicle detected by respective sensors. | 04-14-2011 |
| 20110098896 | AUTOMATIC TRANSMISSION AND PROTECTION METHOD THEREOF - When temperature increase promotion processing (for example, prohibiting lockup application and prohibiting shifts to a high gear position) is started while an initial value of an ATF temperature is in a low temperature region, an ATCU determines whether to terminate the temperature increase promotion processing on the basis of a current ATF temperature, and when the temperature increase promotion processing is started while the initial value of the ATF temperature is in an extremely low temperature region, the ATCU determines whether to terminate the temperature increase promotion processing on the basis of a duration of the temperature increase promotion processing. When the temperature increase promotion processing is determined to be complete, the ATCU terminates the temperature increase promotion processing. | 04-28-2011 |
| 20110144873 | TRANSMISSION - A transmission, such as an automated manual transmission for a motor vehicle, with at least one shift group, such that the shift group or each shift group comprises a shift rail which actuates a shift fork that co-operates with a shift sleeve of the shift group concerned. Associated with the shift rail of the shift group or of each shift group there is a sensor that moves together with the respective shift rail relative to a corresponding measurement receiver such that in the area of at least one shift group, a first relative position between the measurement receiver and the sensor in the actuation direction and a second relative position between the measurement receiver and the sensor perpendicular to the actuation direction of the shift rail concerned can be detected, and from the second relative position, an evaluation device deduces system conditions of the shift group concerned. | 06-16-2011 |
| 20110166757 | CLOSED-LOOP FEEDBACK CONTROL AND REDUCTION OF THE TORQUE CONVERTER CLUTCH SLIP FOR ENHANCED DRIVABILITY FOR HEAVY TIP-IN MANEUVERS - A method for responding to a rapid change in engine torque includes monitoring a change in engine torque and determining a rapid change in engine torque when the change in engine torque exceeds a threshold change in engine torque. Subsequent to determining a rapid change in engine torque, an increase in the torque converter slip is provided by reducing the torque converter clutch pressure command by a selected value and thereafter the feedback control is deactivated for a predetermined duration. Subsequent to the predetermined duration, the feedback control is reactivated to decrease the torque converter slip toward a desired torque converter slip value. | 07-07-2011 |
| 20110190993 | METHOD AND SYSTEM FOR CONTROLLING A VEHICLE POWERTRAIN - A method and system for controlling a powertrain in a vehicle includes steps including registering a road condition. If the registered road condition corresponds to normal road conditions then a first gear selection control algorithm is used intended for driving the vehicle in a normal mode corresponding to the conditions on an ordinary road. If the registered road condition corresponds to soft surface road conditions then a second gear selection control algorithm is used intended for driving the vehicle in a soft surface mode corresponding to the conditions on an soft surface road. In this way, a vehicle can be adapted to be provided with an AMT to work in a satisfactorily way under an increased diversity of conditions. | 08-04-2011 |
| 20110190994 | RANGE DETERMINATION APPARATUS - Herein disclosed is a range determination apparatus of a vehicle which can prevent a shift range from being undefined in the speed change states of an automatic transmission with no manual valve. The range determination apparatus comprises a gear speed change mechanism having a plurality of planetary gears each transmitting an output torque of a drive source, and a plurality of friction engagement elements operative to have respective operation states changed between an engagement state and a disengagement state, and used for an automatic transmission realizing speed changes with a torque transmission path of the gear speed change mechanism changed by the operation states of the friction engagement elements, and a real shift range determination being carried out on the basis of the operation states of the friction engagement elements, wherein a T-ECU is operative to determine a current shift range based on the detection results obtained by oil pressure sensors and the operation patterns preliminarily memorized when the operation states of the friction engagement elements are not being changed. | 08-04-2011 |
| 20110196587 | DEVICE AND METHOD FOR AUTOMATICALLY ADJUSTING TORQUE TRANSMITTING ABILITY OF A TURBOCOMPOUND TRANSMISSION - A device and method are provided for automatically adjusting torque transmitting ability of a hydrodynamic coupling in a transmission arranged between a power turbine and a crank shaft in a turbocompound combustion engine. The method includes continuously registering a value for one or several of:
| 08-11-2011 |
| 20110202244 | METHOD FOR OPERATING THE TORQUE CONVERTER LOCK-UP CLUTCH IN A POWER TRANSMISSION OF A MOBILE MACHINE COMPRISING AT LEAST ONE HYDRAULICALLY ACTUATED LIFTING DEVICE - A method of operating the torque converter lock-up clutch in a power transmission of a working machine comprising at least one hydraulically actuated lifting device. The torque converter lock-up clutch is actuated for disengagement when a predefined limit value for the position of the lifting hydraulic mechanism of the at least one lifting device is exceeded. When the position of the lifting hydraulic mechanism falls below a predefined limit value and when the turbine rotational speed exceeds a predefined threshold value, the torque converter lock-up clutch is reengaged. | 08-18-2011 |
| 20110208395 | METHOD AND DEVICE FOR CONTROLLING AN AUTOMATED GEARBOX - The invention concerns a method and a device for controlling an automated transmission, in which a transmission control device is provided which, on the basis of input signals, emits to suitable actuators control signals which initiate a shift sequence of the automatic transmission. | 08-25-2011 |
| 20110313630 | Calibrating transmission motor torque - The described system and method allow a controller to calibrate a transmission variator of a continuously variable transmission for torque control by obtaining static and dynamic qualities and parameters of the variator through an automated calibration procedure. The system and method employ a pair of transmission mode configurations and operational configurations in combination to obtain system-specific information. In this way, the system is able to calibrate out the system variations to provide effective feed forward torque control of the continuously variable transmission. In an embodiment, a first calibration operation is performed while the transmission is neutralized and a second calibration operation is performed while the transmission is engaged in a mode providing a fixed variator output speed. | 12-22-2011 |
| 20110313631 | GEAR SELECTION METHOD FOR AN AUTOMATIC TRANSMISSION FOR A TRACTION PHASE AFTER A COASTING PHASE OF A MOTOR VEHICLE - Disclosed herein is a gear selection method and device for an automatic transmission for a traction phase (Z | 12-22-2011 |
| 20110313632 | VEHICLE POWER TRANSMISSION APPARATUS - A control unit ( | 12-22-2011 |
| 20110320097 | CONTROL APPARATUS AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - When a post-direct shift gear position does not match a target gear position during a direct shift but before engagement of an input clutch for the post-direct shift gear position begins, an ECU executes engagement control on a reaction brake for the new target gear position instead of executing engagement control on a reaction brake for the post-direct shift gear position, and executes engagement control on an input clutch for the new target gear position instead of executing engagement control on an input clutch for the post-direct shift gear position. | 12-29-2011 |
| 20120029777 | GEAR PRESELECT SYSTEMS FOR A DUAL CLUTCH TRANSMISSION - A dual-clutch transmission (DCT) system includes a vehicle speed offset module that generates a vehicle speed offset signal based on a preselect time and a vehicle acceleration signal. A compensated vehicle speed module generates a compensated vehicle speed based on the vehicle speed offset signal and a vehicle speed. A preselect command module generates a predicted gear signal based on a comparison between the compensated vehicle speed and a shift point from a shift pattern module. The predicted gear signal, identifies a first predicted gear of a DCT. The preselect time is defined as at least an amount of time to disengage a second predicted gear and preengage the first predicted gear. | 02-02-2012 |
| 20120035819 | REAL TIME ESTIMATION ALGORITHM FOR TORQUE CONVERTER CLUTCH FEED FORWARD PRESSURE FOR ECCC CONTROL - A powertrain includes a torque generative device and a torque converter having an impeller, a turbine and a torque converter clutch. A method to control torque converter slip includes monitoring a reference slip and a turbine speed of the torque converter, determining a turbine torque based upon the reference slip and the turbine speed, determining a feed forward torque converter clutch pressure command based upon the turbine torque, a torque generative device torque, and a TCC gain, and controlling the torque converter clutch based upon the feed forward torque converter clutch pressure command. | 02-09-2012 |
| 20120065854 | SYSTEM AND METHOD TO PREVENT SHIFT HUNTING IN A POWERTRAIN - A method for preventing shift hunting in a powertrain is disclosed. The powertrain includes an engine and a transmission having a variator, a first gearset, and a second gearset. The engine is operated at a first substantially constant speed. A first transmission shift condition is detected. One or more shift hunting prevention methods are selected as a function of operating parameters from a group of shift hunting prevention methods. The one or more shift hunting prevention methods are implemented as a function of detecting the first transmission shift condition. | 03-15-2012 |
| 20120078480 | METHOD OF COOLING A DUAL CLUTCH TRANSMISSION - A method of cooling a dual clutch transmission is provided. The transmission has first and second input clutches alternately engagable to transfer torque to an output member along first and second input shafts, respectively, at various speed ratios dependent upon engagement of synchronizers. The method includes determining a currently established speed ratio by determining which of the input clutches and synchronizers are currently engaged and which of the input clutches and synchronizers are currently open. One of the open synchronizers is then engaged during the currently established speed ratio to cause the open input clutch to rotate at a speed greater than the speed of rotation of the engaged input clutch, thereby creating a fan cooling effect. | 03-29-2012 |
| 20120095658 | CONTROL APPARATUS - A control apparatus which is capable of enhancing the accuracy of control of a controlled object having characteristics that dead time and response delay thereof vary. The control apparatus includes an ECU. The ECU calculates four predicted values as values of a controlled variable associated with respective times when four dead times elapse, respectively, calculates four weight function values associated with an exhaust gas volume, and calculates four products by multiplying the predicted values by the weight function values, respectively. The ECU sets the total sum of the four products as a predicted equivalent ratio and calculates an air-fuel ratio correction coefficient such that the predicted equivalent ratio becomes equal to a target equivalent ratio. | 04-19-2012 |
| 20120109476 | METHOD FOR OPERATING A DRIVE TRAIN - A method of operating a drive-train which comprises a drive aggregate, a transmission and a starting clutch connected between the drive aggregate and the transmission such that during rolling and coasting, in a thrust operation, the drive-train is operated in such manner that a target value for the position of the clutch is determined as a function of a transmission input speed. The target value for the position of the clutch is compared with a corresponding actual value and, on the basis of the deviation between the target and actual values, a control parameter is generated for adjusting the clutch. The target value for the position of the clutch, during rolling and coasting, is determined in such manner that for a defined value of the transmission input speed, a target value is determined for the position of the clutch when rolling which is different from that determined when coasting. | 05-03-2012 |
| 20120116637 | CVT CONTROL APPARATUS - In an apparatus for controlling a belt type CVT connected to an engine (prime mover) mounted on a vehicle through a forward clutch to change power of the engine in speed and transmit the power to a driven wheel of the vehicle, it is configured to determine whether it is in a predetermined operating condition where an operator is likely to apply a panic brake or the like, set a first value as a friction coefficient μ of the clutch to calculate and control a desired supply hydraulic pressure based on the first value when the determination result is negative, and set a second value greater than the first value to calculate and control the desired supply hydraulic pressure based on the second value when the determination result is affirmative. | 05-10-2012 |
| 20120123654 | DOUBLE TRANSITION SHIFT CONTROL IN AN AUTOMATIC POWERSHIFTING TRANSMISSION - A system and method for controlling double transition shifts in an automatic transmission having multiple gear sections. During a double transition shift, the system performs simultaneous closed loop control of the primary oncoming clutch in the primary gear section and the secondary off-going clutch of the secondary gear section. Before the input shaft of the secondary gear section is fully pulled down or the secondary off-going clutch becomes overheated, the system switches closed loop control of the input shaft to the secondary on-coming clutch of the secondary gear section. The system utilizes model-based calculations to determine the initial clutch pressure settings when a clutch enters closed loop control. | 05-17-2012 |
| 20120221219 | FLUID TRANSMISSION DEVICE - A fluid transmission device includes a fluid transmission section capable of transmitting power transmitted to an input member to an output member via a working fluid, a lock-up clutch section capable of transmitting power transmitted to the input member to the output member via a friction engagement section, and a control unit configured to execute a torque ratio variable control that makes a torque ratio which is a ratio between torque output from the output member and torque input to the input member variable by adjusting a friction engagement state of the friction engagement section, when the fluid transmission section is in an operation state that the fluid transmission section amplifies torque input to the input member and outputs torque from the output member. | 08-30-2012 |
| 20120245812 | System and Method for Automatically Downshifting an Automatic Transmission with Alternate Forward Launch Gear - An electronic control system for an automatic transmission having an alternate forward start gear, a lower forward start gear and a lower forward start gear lock our feature, in which the electronic control system can sense from various conditions when more power to the drive train is needed and cause the automatic transmission to automatically downshift to the lower forward start gear. | 09-27-2012 |
| 20120290180 | CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip. | 11-15-2012 |
| 20130018556 | SYSTEM AND METHOD FOR ADAPTIVE TRANSMISSION CLUTCH TORQUE CONTROLAANM Williams; Robert L.AACI HollyAAST MIAACO USAAGP Williams; Robert L. Holly MI USAANM Whitton; Matthew D.AACI HowellAAST MIAACO USAAGP Whitton; Matthew D. Howell MI USAANM Mitts; KurtAACI Santa MonicaAAST CAAACO USAAGP Mitts; Kurt Santa Monica CA USAANM Deras; DanielAACI BrightonAAST MIAACO USAAGP Deras; Daniel Brighton MI US - A control system for a transmission includes a memory module, a position module, an error module, an integral module, and an adjustment module. The memory stores a control value as a function of clutch torque. The position module controls a position of a clutch based on the control value. The error module periodically determines a slip speed error based on a difference between a target slip speed and an estimated slip speed of the clutch. The integral module periodically determines an integral of the slip speed error. The adjustment module adjusts the control value based on the integral. A method for controlling a transmission is also provided. | 01-17-2013 |
| 20130041563 | CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - In a control apparatus for an automatic transmission that changes speed of an engine output and transmits it to driven wheels, having an electromagnetic control valve installed in a hydraulic pressure supply device of the transmission and operated upon receipt of current to control hydraulic pressure supply to the transmission; and a current supply controller composed of a microcomputer installed on an electronic circuit board, calculating a current supply command value of the current supplied to the valve based on a hydraulic pressure supply control value of the transmission calculated based on the vehicle's operating condition and controlling current supply from a battery to the valve based on the command value, a load detector detects load of an electric device that shares ground set on the board with the valve; and the current supply controller calculates the command value based on the hydraulic pressure supply control value and detected load. | 02-14-2013 |
| 20130060435 | Control for Managing Actuator Output Pressure Applied to a Torque Transmitting Mechanism of a Multi-Speed Transmission - A method for managing torque transmitting mechanism actuator output pressure under low supply pressure conditions is provided. The method is executable to control engagement of a torque transmitting mechanism during such conditions. | 03-07-2013 |
| 20130080006 | AUTOMATIC TRANSMISSIONS AND METHODS THEREFOR - Systems and methods for controlling transmissions and associated vehicles, machines, equipment, etc., are disclosed. In one case, a transmission control system includes a control unit configured to use a sensed vehicle speed and a commanded, target constant input speed to maintain an input speed substantially constant. The system includes one or more maps that associate a speed ratio of a transmission with a vehicle speed. In one embodiment, one such map associates an encoder position with a vehicle speed. Regarding a specific application, an automatic bicycle transmission shifting system is contemplated. An exemplary automatic bicycle includes a control unit, a shift actuator, various sensors, and a user interface. The control unit is configured to cooperate with a logic module and an actuator controller to control the cadence of a rider. In one embodiment, a memory of, or in communication with, the control unit includes one or more constant cadence maps that associate transmission speed ratios with bicycle speeds. | 03-28-2013 |
| 20130085648 | CONTROL SYSTEM FOR SHIFTING AN AUTOMATIC TRANSMISSION - A control system is provided for shifting an automatic transmission of a motor vehicle, which includes, but is not limited to a speed controller, and an electronic control device. Through the electronic control device the parameters vehicle speed, position of the speed controller and acceleration of the speed controller can be captured. Through the electronic control device and through comparison of the captured values of the parameters with predetermined reference values a shifting time is determined for shifting the automatic transmission. | 04-04-2013 |
| 20130090818 | Multiple-Ratio Automatic Transmission Control Method And System For Ratio Upshifts - A speed ratio shaft control for multiple ratio vehicle transmission has controlled release of an off-going transmission clutch and controlled engagement of an on-coming transmission clutch during a speed ratio upshift, at least one clutch being a friction torque establishing clutch. A controller, using shift-timing software strategy, actively manages in real time a clutch torque level for each clutch so that transient torque disturbances in a transmission torque output shaft are mitigated. | 04-11-2013 |
| 20130138310 | POWER TRANSMISSION APPARATUS AND METHOD FOR CONTROLLING POWER TRANSMISSION APPARATUS - A power transmission apparatus includes a continuously variable transmission, a clutch, a drive condition determination device, an input torque calculator, a belt transfer torque calculator, and a clutch transfer torque controller. The continuously variable transmission includes a drive pulley, a driven pulley, and a belt. The clutch transfer torque controller controls a transfer torque of the clutch so that the transfer torque of the clutch is higher than or equal to an input torque calculated by the input torque calculator and is lower than a transfer torque of the belt calculated by the belt transfer torque calculator if it is determined that the vehicle is under a drive condition. | 05-30-2013 |
| 20130151094 | LINE PRESSURE CONTROL METHOD FOR A TRANSMISSION HAVING A DOG CLUTCH - A method of controlling the system pressure in an automatic transmission having interlocking shifting elements in which, during shifts and gear engagement and gear disengagement processes involving interlocking shifting elements, as a function of the engagement and disengagement times of the interlocking shifting elements involved and the shift conditions of the frictional shifting elements involved, the system pressure is increased to an elevated pressure that enables rapid engagement or disengagement of the interlocking shifting elements, in such manner that the system pressure is increased in at least two phases whose timing depends on the shift conditions of at least one of the shifting elements involved. | 06-13-2013 |
| 20130179046 | METHOD AND SYSTEM FOR DETERMINING AN ACCUMULATOR PRE-CHARGE PRESSURE IN A FLUID CIRCUIT - A system includes a pump, accumulator, a sensor which measures line pressure in a fluid circuit, and a controller. The controller plots and calculates respective slopes of first and second sets of measured pressure values from the sensor, calculates a slope ratio, and compares the slope ratio to a threshold. The controller also records the pre-charge pressure as the point of intersection of lines representing the slopes when the ratio exceeds the threshold. A control action is executed when the pre-charge pressure drops below a calibrated minimum threshold. A method includes measuring the pressure values, calculating the respective slopes and the slope ratio, comparing the slope ratio to a ratio threshold, recording the point of intersection of lines representing the slopes as an interpolated pre-charge pressure value when the ratio exceeds the threshold, and executing the control action. | 07-11-2013 |
| 20130253788 | METHOD FOR THE OPERATION OF A TRANSMISSION DEVICE IN A VEHICLE DRIVE TRAIN - A method shifting a vehicle drive-train transmission having frictional and interlocking shifting elements which are engageable to obtain various gears. When shifting from a current gear to a target gear, in which the interlocking shifting element is engaged, if after the shift starts it becomes necessary to engage the current gear in the transmission while engaging the interlocking shifting element, a current operating condition of the interlocking shifting element is determined. If the current operating condition of the interlocking shifting element indicates that engagement can be interrupted and the interlocking shifting element can be disengaged, the interlocking shifting element is disengaged. If the current operating condition of the interlocking shifting element indicates that engagement of the interlocking shifting element has to be carried out and the interlocking shifting element engaged, then the interlocking shifting element is engaged and/or the force flow in the transmission device is interrupted. | 09-26-2013 |
| 20130261912 | CONTROL DEVICE FOR DUAL CLUTCH TRANSMISSION AND CONTROL METHOD FOR DUAL CLUTCH TRANSMISSION - A dual clutch transmission includes a transmission control unit that controls action of a first clutch actuator, a second clutch actuator, and a shift mechanism; determines whether or not a clutch torque capacity for an engaging-side clutch has increased to a determination value during a clutch change period; and, if the clutch torque capacity for the engaging-side clutch has increased to the determination value, changes the torque transmission path by reducing the clutch torque capacity of a release-side clutch. | 10-03-2013 |
| 20130268170 | Speed Control Structure and Method for Work Vehicle - A load control system for a work vehicle including set rotation speed detection means for detecting a set rotation speed of an engine of the work vehicle, actual rotation speed detection means that senses an actual rotation speed of the engine, a continuously variable speed change device that receives power from the engine of the work vehicle, speed change position detecting means for detecting a speed change operating position of the continuously variable speed change device, operating means for speed-shifting the continuously variable speed change device, and control means for controlling the operation of the operating means. | 10-10-2013 |
| 20130282244 | DETECTION OF AN EXHAUSTING CLUTCH IN A NEUTRAL IDLE-EQUIPPED TRANSMISSION - A vehicle includes an engine, a torque converter, a transmission, and a controller. The transmission has an input member connected to a turbine of the torque converter. The transmission includes a neutral idle (NI) state and a designated NI clutch actuated to enter the NI state. The controller calculates a reference slip error as a function of engine speed and turbine speed, detects when the designated NI clutch is exhausting while operating in the NI state as a function of the reference slip error, and executes a control action when the exhausting NI clutch is detected. A method includes measuring engine and turbine speed, calculating the reference slip error value as a function of the engine and turbine speeds, detecting when the designated NI clutch is exhausting while operating in the NI state using the reference slip error, and executing a control action when the exhausting NI clutch is detected. | 10-24-2013 |
| 20130282245 | Method for Controlling an Automatic Transmission - The invention relates to a method for controlling an automatic transmission, more particularly a method for controlling gear changes in an automatic transmission of a motor vehicle driven by an internal combustion engine, having the following steps: predicting the fuel consumption of the internal combustion engine that would result if the automatic transmission were shifted from its present gear into a next higher gear with relatively low transmission ratio between a transmission input and a transmission output of the automatic transmission, and/or predicting the fuel consumption of the internal combustion engine that would result if the automatic transmission were shifted from its present gear into a next lower gear with a relatively high transmission ratio between the transmission input and the transmission output; and comparing the predicted fuel consumption of the internal combustion engine in the next higher gear of the automatic transmission and/or the predicted fuel consumption of the internal combustion engine in the next lower gear of the automatic transmission with the present fuel consumption of the internal combustion engine; shifting the automatic transmission into the next higher gear or into the next lower gear as a function of the comparison in order to obtain a fuel consumption saving. The invention is characterized in that, before the shift, an additional fuel consumption resulting from the shift process itself is predicted, and a shift is performed as a function of the predicted additional fuel consumption. | 10-24-2013 |
| 20130311057 | Closed-Loop Torque Phase Control for Shifting Automatic Transmission Gear Ratios Based on Friction Element Load Estimation - A closed loop shift control apparatus and method based on estimated torque in friction elements controls a torque transfer phase when shifting from a low gear configuration to a high gear configuration for an automatic transmission system. When pressure actuated friction elements are selectively engaged and released to establish torque flow paths in the transmission, estimates of torsional load exerted on the off-going friction element are used to predict the optimal off-going friction element release timing for achieving a consistent shift feel. The estimated torque is preferably calculated by using estimated torque signals generated as a function of speed measurements represented either the engine speed and turbine output speed or transmission output speed and wheel speed under dynamically changing conditions. | 11-21-2013 |
| 20130317713 | SPEED RATIO CONTROL DEVICE AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION - A continuously variable transmission ( | 11-28-2013 |
| 20130332039 | VIBRATION DETECTION AND MITIGATION IN A VEHICLE - A method of controlling a vehicle includes detecting vibration in a drivetrain of the vehicle with a fore/aft accelerometer during a launch event. An operating regime of the vehicle is identified concurrently with the detected vibration when the detected vibration is outside a predefined allowable range. A control strategy of the drivetrain is adjusted to define a revised control strategy to avoid the identified operating regime. The revised control strategy is applied to control the drivetrain to mitigate vibration in the drivetrain. | 12-12-2013 |
| 20130345941 | SHIFT RAIL TRANSMISSION POSITION SENSING - Receiving sensor data related to position of a gear in a transmission, the sensor data including data from a first sensor and data from a second sensor; determining a first indicated position of the gear from the data from the first sensor; determining a second indicated position of the gear from the data from the second sensor; comparing the first indicated position to the second indicated position; and determining based on the comparison a gear engagement status of the gear. | 12-26-2013 |
| 20140012472 | TRAVEL CONTROL UNIT OF WORKING VEHICLE - A travel control unit of a working vehicle includes an HST which is a hydraulic continuously variable transmission having a hydraulic pump and a hydraulic motor, a pedal sensor which is an operator sensor which detects a position of an acceleration pedal which is an acceleration operator, and a controller which changes a displacement of the hydraulic pump based on the position of the acceleration pedal. The controller increases the displacement of the hydraulic motor as the displacement of the hydraulic pump is reduced due to a displacement of the acceleration pedal to a low-velocity side. | 01-09-2014 |
| 20140019023 | DOUBLE TRANSITION SHIFT CONTROL IN AN AUTOMATIC POWERSHIFTING TRANSMISSION - A system and method for controlling double transition shifts in an automatic transmission having multiple gear sections. During a double transition shift, the system performs simultaneous closed loop control of the primary oncoming clutch in the primary gear section and the secondary off-going clutch of the secondary gear section. Before the input shaft of the secondary gear section is fully pulled down or the secondary off-going clutch becomes overheated, the system switches closed loop control of the input shaft to the secondary on-coming clutch of the secondary gear section. The system utilizes model-based calculations to determine the initial clutch pressure settings when a clutch enters closed loop control. | 01-16-2014 |
| 20140025269 | CONTROL DEVICE OF VEHICLE DRIVE DEVICE - A control device of a vehicle drive device in which an output of a power source is input from a hydraulic power transmission device via a friction engagement device to a continuously variable transmission and transmitted toward drive wheels after speed is changed by the continuously variable transmission, the control device includes: an abnormality detecting portion configured to make a determination of abnormality indicating that the friction engagement device is in a complete release state or a slip state; and an abnormality distinguishing portion, if the abnormality detecting portion makes a determination of abnormality, configured to judge that the friction engagement device is in the slip state when an input/output rotation speed difference between an input rotation speed and an output rotation speed of the hydraulic power transmission device is equal to or greater than a predetermined slip determination value and that the friction engagement device is in the complete release state when the input/output rotation speed difference is less than the slip determination value. | 01-23-2014 |
| 20140032066 | CONTROL APPARATUS FOR CONTINUOUSLY VARIABLE TRANSMISSION - In an apparatus for controlling a continuously variable transmission, a transmission ratio, an input shaft rotational speed and an input torque, etc., are detected, an axial thrusts of the drive and driven pulleys are detected therefrom, an inter-shaft force is detected, a friction coefficient of the driven pulley including at least a radial component of the friction coefficient μRDN is calculated in accordance with predetermined relational equations, a target axial thrust of the driven pulley is calculated based on at least the friction coefficient and the axial thrust of the driven pulley is controlled based on the calculated target axial thrust. | 01-30-2014 |
| 20140032067 | METHOD FOR ELECTRONICALLY CONTROLLING A BICYCLE GEARSHIFT AND ELECTRONICALLY SERVO-ASSISTED BICYCLE GEARSHIFT - A method for electronically controlling a bicycle gearshift comprising at least one derailleur is disclosed, comprising the sequential steps of:
| 01-30-2014 |
| 20140074365 | Shift Control Method for a Vehicle with DCT - A shift control method includes: a step for confirming whether a high rank shift order is made during a take up control; a step for determining whether a difference between rotation number of an input shaft and the rotation number of the engine is within a predetermined reference rotation number when a high rank shift order has been made as a result of the shift order confirming step; and a step for ending the take up control and converting it into a shift control when the difference between rotation numbers of the input shaft and the engine has been within a predetermined reference rotation number as a result of the slip determining step. Even when a high rank shift order is made, the reduction of the shift replying property and shift feeling can be minimized to improve riding feeling and durability of the first and second clutches. | 03-13-2014 |
| 20140088845 | SHIFT CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - An automatic transmission shift control device include a controller that is programmed to shift an automatic transmission by issuing a command for switching an interference shift element from an engaged state to a disengaged state, and by issuing a command for switching a friction shift element from a released state to a locked state. The controller includes a progressive friction-shift-element switchover section which causes progressive switching of the friction shift element from the released state to the locked state prior to the command for switching of the interference shift element from the engaged state to the disengaged state. The controller includes an interference-shift-element switchover section which causes the switching of the interference shift element from the engaged state to the disengaged state when transmission torque of the interference shift element decreases to a predetermined value as the friction shift element progressively switches from the released state to the locked state. | 03-27-2014 |
| 20140088846 | BICYCLE SHIFTING METHOD - A bicycle shifting method suitable for controlling a gear ratio of a front chain ring and a rear chain ring of the bicycle is provided. The bicycle has a front electronic derailleur, a rear electronic derailleur, a controller, and a controlling switch, and the controller stores a gear-ratio table. The bicycle shifting method includes following steps. The controlling switch is triggered to generate a corresponding signal. One or both of the electronic derailleurs are controlled by the controller according the signal. When the signal is a speed-increasing signal, the controller controls the electronic derailleurs to increase the gear ratio along a speed-increasing path of the gear-ratio table. When the signal is a laborsaving signal, the controller controls the electronic derailleurs to decrease the gear ratio along a laborsaving path of the gear-ratio table. The speed-increasing path is different from the laborsaving path. | 03-27-2014 |
| 20140095035 | System and Method for Avoiding Engine Underspeed and Stall - System and method for controlling a transmission in response to transient torque events are disclosed. The method includes commanding a maximum transmission output torque; comparing the commanded output torque to a feedback torque to determine if they are equal; and incrementally increasing the transmission output torque until equal. A machine and a powertrain include a controller configured to command a maximum negative transmission output torque in response to a transient torque event, and incrementally increase the transmission output torque until such time as the transmission output torque is equal to or within a preset range of the feedback torque. | 04-03-2014 |
| 20140107901 | METHOD FOR CONTROLLING SYNCHRONIZATION OF AUTOMATED MANUAL TRANSMISSION - A method for controlling synchronization of an automated manual transmission includes: a step of dividing synchronization section that divides the entire synchronization section where synchronization is performed into a plurality of synchronization sections in accordance with the speed of the synchronization; a step of setting the rate of change of a target number of revolutions that sets the rate of change of a target number of revolutions of an input shaft in accordance with the speed of the synchronization; and a step of synchronization that performs feedback control such that the rate of change of the number of revolutions of the input shaft is synchronized while following the rate of change of a target number of revolutions. | 04-17-2014 |
| 20140121921 | Method Of Controlling A Hydraulic Pressurization System Of A Transmission - The present disclosure relates to a method of controlling a vehicle. The method includes receiving a signal indicative of the vehicle being in a stop condition or in the process of stopping. The method also includes activating an auxiliary hydraulic pressurization system in response to the signal and regulating a hydraulic pressure in a hydraulic control system of a transmission. A drive unit is disabled such that a main pump of the hydraulic control system discontinues providing hydraulic pressure to the hydraulic control system. The hydraulic pressure is maintained at a hold pressure in the hydraulic control system by the auxiliary hydraulic pressurization system. | 05-01-2014 |
| 20140121922 | AUTOMATIC TRANSMISSIONS AND METHODS THEREFOR - Systems and methods for controlling transmissions and associated vehicles, machines, equipment, etc., are disclosed. In one case, a transmission control system includes a control unit configured to use a sensed vehicle speed and a commanded, target constant input speed to maintain an input speed substantially constant. The system includes one or more maps that associate a speed ratio of a transmission with a vehicle speed. In one embodiment, one such map associates an encoder position with a vehicle speed. Regarding a specific application, an automatic bicycle transmission shifting system is contemplated. An exemplary automatic bicycle includes a control unit, a shift actuator, various sensors, and a user interface. The control unit is configured to cooperate with a logic module and an actuator controller to control the cadence of a rider. In one embodiment, a memory of, or in communication with, the control unit includes one or more constant cadence maps that associate transmission speed ratios with bicycle speeds. | 05-01-2014 |
| 20140129101 | CONTROL APPARATUS FOR VEHICLE - A value correlated with a basic required driving force to be required at re-acceleration is estimated from the deceleration of a decelerating vehicle. A target gear ratio of a CVT is determined from a value obtained by correcting the value correlated with the basic required driving force based on a maximum amount of vehicle speed change at the current time point and an amount of vehicle speed change from the start of a gear ratio control up to the current time point. | 05-08-2014 |
| 20140156155 | Determination of Optimum Tractor Reverse Speed - Machines, such as large tractors used in earthmoving, operate in a cycle of pushing forward and reversing to a starting point. The net performance of the machine is a function of the speed at which the reverse segment is performed. Generally, using the highest gear for reverse accomplishes the goal of the fastest return. However, some high slope grade conditions may result in higher speeds using lower gears. A combination of slope, track speed vs. drawbar pull, and track slip may be used to recommend a gear and track speed with the greatest ground speed for reverse operation. | 06-05-2014 |
| 20140195131 | UPSHIFT CONTROL OF A DRY DUAL-CLUTCH TRANSMISSION - A vehicle includes an engine, a dry dual-clutch transmission (dDCT) having a pair of input clutches and a gearbox containing oddly- and evenly-numbered gear sets, and a transmission control module (TCM). Application of one of input clutches connects the engine to a corresponding one of the oddly- or evenly-numbered gear sets. The TCM includes feed-forward PID-based control logic, and a torque-to-position (TTP) table for each input clutch. The TCM commands a position of a designated input clutch during a power-on upshift using the feed-forward, PID-based control logic, and selectively adapts the TTP table as a function of an inertia and acceleration value of the engine. The TCM may apply an asymmetrical handoff profile to commanded oncoming and offgoing clutch torques during the torque phase of the upshift. The TCM may also adjust the TTP table as a function of the frequency of use of the input clutches. | 07-10-2014 |
| 20140214293 | DOG CLUTCH CONTROL APPARATUS FOR AUTOMATED TRANSMISSION - A dog clutch control apparatus for an automated transmission includes a rotary shaft, plural dog clutch mechanisms, each of the dog clutch mechanisms including a clutch ring, a clutch hub arranged next to the clutch ring, a sleeve fitted with the clutch hub, a dog clutch portion which is provided at the clutch ring and selectively meshes with a spline formed at the sleeve, an axial driving device for moving the sleeve, the dog clutch control apparatus includes a disengagement detecting portion for detecting disengagement before the sleeve reaches a neutral position and a control apparatus for controlling operation of the axial driving device, wherein in a case where the disengagement is detected at a time of shifting operation, the control apparatus starts a shift-related control. | 07-31-2014 |
| 20140214294 | AUTOMATIC SHIFT APPARATUS - An automatic shift apparatus including a rotation shaft, a dog clutch gear shift mechanism, and a control unit. The control unit supplies a predetermined electric current to a shaft moving apparatus to move a sleeve in an engaged state engaged with one of a first clutch ring and a second clutch ring and supplies a braking electric current smaller than the predetermined electric current to the shaft moving apparatus to exert a braking force on the sleeve, the braking force directed in the opposite direction relative to a direction of movement of the sleeve, before a spline of the sleeve disengages from a first dog clutch portion or a second dog clutch portion of the mentioned one of the first clutch ring and the second clutch ring, | 07-31-2014 |
| 20140222304 | System And Method For Controlling A Continuously Variable Transmission During A Shuttle Shift - A method for controlling a continuously variable transmission of a work machine during a shuttle shift is disclosed. The method may generally include initiating a directional swap by disengaging an off-going directional clutch of the continuously variable transmission and slipping an on-coming directional clutch of the continuously variable transmission to decelerate the work machine in an off-going direction. In addition, the method may include estimating a total amount of energy to be dissipated in the on-coming directional clutch during the shuttle shift, comparing the total amount of energy to a predetermined energy threshold and, if the total amount of energy is equal to or exceeds the predetermined energy threshold, performing the reversion action to complete the shuttle shift, wherein the reversion action corresponds to an action taken to engage one of the off-going directional clutch or the on-coming directional clutch so as to permit the shuttle shift to be completed using ratio changing. | 08-07-2014 |
| 20140236438 | PROCEDURE FOR OPERATING A TRANSMISSION DEVICE, PARTICULARLY A 9-SPEED-TRANSMISSION - A method for operating a 9-speed transmission which changes operating states by actuating shift elements. At least one of the shift elements is a form-locking shift element, which disengages to implement a defined transmission operating state during which the power flow, between transmission input and output shafts, is present or interrupted. A sensor is associated with the locking shift element. An operating state of the locking shift element can be determined by the sensor, Upon a request to disengage the locking shift element, a disengagement control signal is generated and the locking shift element is actuated in the disengagement direction, depending on the disengagement control signal. The transmission is shifted to a safe operating state, in which at least the transmission output shaft can rotate, when an engaged operating state of the locking shift element is determined by the sensor even though a disengagement control signal was generated. | 08-21-2014 |
| 20140236439 | PROCEDURE FOR OPERATING A TRANSMISSION DEVICE, PARTICULARLY A 9-SPEED-TRANSMISSION - A method of operating a transmission device. At least one of the shift elements is a form-locking shift element. A sensor is associated with the form-locking shift element which can determine an operating state of the form-locking shift element. When a request to disengage the form-locking shift element occurs, a disengagement control signal is generated and the form-locking shift element is actuated in the direction of disengagement, depending on the disengagement control signal. The transmission device is transferred to a safe operating state in which the transmission output shaft can rotate, when an actuating pressure that changes the operating state of the form-locking shift element is determined with the sensor, even though a disengagement control signal was not generated, and/or when the sensor is associated with at least two form-locking shift elements and the form-locking shift elements are subjected to actuating pressure to implement a requested operating state change. | 08-21-2014 |
| 20140236440 | Method of Setting Transmission Shift Points in Real-Time Based Upon An Engine Performance Curve - The present invention provides a method for setting a shift point for shifting a transmission for a powered vehicle between a first gear ratio and a second gear ratio. The method includes determining input power data points based on real-time input torque data. The input torque data includes a maximum input torque. The method also includes calculating a gear step value based on the first gear ratio and second gear ratio. The method further includes determining a first power value and computing a second power value based on the gear step value. The first power value and second power value are compared to one another and adjustments are incrementally made in the first power value speed until the difference between first and second power values meets a threshold. The shift point is therefore based on the result of comparing the first power value and the second power value and the corresponding speed associated with the first power value. | 08-21-2014 |
| 20140244122 | VEHICLE CONTROL DEVICE AND METHOD - A vehicle control device that includes a computer which controls an in-vehicle device provided in a vehicle. The control device can be configured with a main processing unit that performs a process for operating the in-vehicle device, and a safety function processing unit that performs a safety function process for detecting a dangerous state of the in-vehicle device which is operated according to the process performed by the main processing unit and bringing the in-vehicle device into a safe state. The safety function processing unit may include execution order monitoring means for monitoring whether an execution order of the safety function process is correct when the safety function process is performed. | 08-28-2014 |
| 20140297143 | METHOD FOR SELECTING A STARTING GEAR - Method to control a drivetrain of a vehicle, wherein the vehicle is provided with a vibration sensor and a system for calculating the mass of the vehicle during driving, and where a starting gear of the transmission is automatically chosen dependent on the calculated mass of the vehicle. The method chooses a lower starting gear than the during, driving calculated mass has indicated if the vibration sensor has registered a vibration of the vehicle at stand still. | 10-02-2014 |
| 20140303859 | ELECTRIC SHIFT OPERATING DEVICE - An electric shift operating device is basically provided with a base member, a first operating member, a clicking mechanism, a signal generating arrangement and a controller. The base member is configured to be attached to a bicycle. The first operating member is movably supported on the base member from a rest position to an operated position. The clicking mechanism is operated by the first operating member to produce a haptic feedback response upon the first operating member reaching the first operated position. The signal generating arrangement generates a first shift start signal prior to or upon the first operating member reaching the first operated position. The controller controls a gear position of the electric gear changing device. The controller receives the first shift start signal and operates the electric gear changing device towards a target gear position upon receiving the first shift start signal. | 10-09-2014 |
| 20140303860 | AUTOMATIC TRANSMISSION - An automatic transmission includes an input member, a planetary gear set, a plurality of engagement mechanisms, an output member, a shift position detecting unit, an input rotational speed detecting unit, a control unit, and a switching mechanism. When a shift position is changed from a forward drive range to a reverse drive range, the control unit performs a reverse preparation mode in which a rotational speed of an element to be fixed by the switching mechanism is lower than or equal to a predetermined speed by setting an engagement mechanism in one of a connection mode and a fixed mode. Upon performing the reverse preparation mode, the control unit engages the engagement mechanism that connects the element fixed by the switching mechanism to the input member and, thereafter, engages the engagement mechanism that makes the rotational speed of the input member lower than or equal to the predetermined speed. | 10-09-2014 |
| 20140336890 | System And Method For Optimizing Downshifting Of A Transmission During Vehicle Deceleration - The present disclosure provides a method of selecting a gear ratio of a transmission. The method includes measuring a current road grade with a sensing device and communicating the current road grade measurement to the controller. The controller receives a signal corresponding to a service brake input and determines a desired maximum acceleration limit of the vehicle. The method also includes calculating a predicted vehicle acceleration, measuring a current vehicle acceleration, and calculating an error value as a function of the predicted vehicle acceleration and measured vehicle acceleration. The method also computes an estimated required tractive braking effort and estimated tractive braking effort for at least one of N automatically selectable gear ratios of the transmission and selects one gear ratio of the N automatically selectable gear ratios for the operation of the transmission based on a comparison of the estimated required tractive braking effort and estimated tractive braking effort. | 11-13-2014 |
| 20140343810 | CONTINUOUSLY-VARIABLE TRANSMISSION AND CONTINUOUSLY-VARIABLE TRANSMISSION CONTROL METHOD - A first determining unit configured to determine whether the indicated pressure of a primary pulley pressure has become a line pressure during an up shift, an indicated pressure control unit configured to make the indicated pressure of the primary pulley pressure alone higher than the line pressure when the target shift rate is determined to be equal to or lower than a predetermined shift rate and the speed ratio is determined not to have become the target speed ratio, and an estimated time detecting unit configured to detect a predetermined time it takes until the primary pulley pressure can be regarded as being equal to the line pressure after the target shift rate is determined to be equal to or lower than the predetermined shift rate, and the indicated pressure of the primary pulley pressure is made higher than the line pressure, are provided, and the indicated pressure control unit is configured to calculate the deviation between the indicated pressure of the primary pulley pressure and indicated pressure of the line pressure after the estimated predetermined time is over, and control transmission of a continuously-variable transmission while maintaining the deviation after the predetermined time is over. | 11-20-2014 |
| 20140343811 | SYSTEM AND METHOD FOR SYNCHRONIZING ENGINE AND TRANSMISSION SYSTEM OPERATION WITHIN AN AGRICULTURAL VEHICLE - A system and method for controlling a transmission system is provided. One agricultural vehicle includes a vehicle controller configured to instruct an engine controller to maintain an engine at a constant speed and to receive a first signal from a transmission controller indicative of gear shift initiation. The vehicle controller is also configured to instruct the engine controller to maintain the engine at a current torque upon receipt of the first signal and to receive a second signal from the transmission controller indicative of gear shift completion. The vehicle controller is configured to instruct the engine controller to maintain the engine at the constant speed upon receipt of the second signal. | 11-20-2014 |
| 20140358390 | DIRECT CLUTCH SLIP CONTROL - An automatic transmission for a vehicle drivetrain includes a transmission housing, an input shaft, an output shaft, and a plurality of gears within the transmission housing. The plurality of gears defines multiple mechanical gear ratios between the input shaft and the output shaft. The transmission further includes a plurality of clutches operable to selectively engage the multiple mechanical gear ratios, and a plurality of rotational speed sensors. Each rotational speed sensor is operable to measure rotational speeds relative to the transmission housing for of one of the input shaft, the output shaft, or one of the plurality of gears. The transmission further includes a transmission control system configured to receive signals representing the measured rotational speeds from the plurality of rotational speed sensors and control the plurality of clutches to change between gear ratios based at least in part on the signals representing the measured rotational speeds. | 12-04-2014 |
| 20140365093 | CONTROL DEVICE - A control device configured to control a vehicle. When the required driving force is equal to or less than a control judgment value, the shift control section judges that an implementing condition of engagement limited downshift control is met, starts transition control to cause the release-side engagement device to transition to a non-direct-coupled engagement state and, after the release-side engagement device transitions to a non-direct-coupled engagement state, starts increasing rotation speed control to control rotation speed of the input member to be higher than synchronized rotation speed, starts differential rotation speed control to control the rotation speed to be higher than the synchronized rotation speed, and prohibits engagement of the engagement-side engagement device until it becomes higher than the synchronized rotation speed. | 12-11-2014 |
| 20150012192 | System and method of selecting optimum gear of automobile - A system and method of selecting optimum gear of automobile is provided. The system includes a data processor; a running vehicle data collection module; an output module; and a memory. The memory is stored with universal characteristic curve of an engine, gear ratios of a gearbox, speed reduction ratios, and a tire radius. The running vehicle data collection module collects and sends a current vehicle speed, revolutions of the engine, and an output torque of the engine to the data processor. The data processor processes the universal characteristic curve of the engine, the gear ratios of the gearbox, the speed reduction ratios, and the tire radius to determine a current gear and an optimum gear. The data processor outputs the optimum gear to the output module if the current gear is not the optimum gear. The system can select optimum gear in real time and lower fuel consumption. | 01-08-2015 |
| 20150012193 | Transmissions with Torque and/or Speed Sensor Arrangements - A transmission includes sensors positioned adjacent respective pairs of magnetized bands on a shaft of the transmission for detecting magnetic flux emanating from the bands in response to torque on the shaft. The transmission further includes an electronics interface assembly configured to respectively provide drive signals to the sensors and to receive from the sensors, in response to the drive signals, output signals indicative of the torque on the shaft as detected by the sensors. | 01-08-2015 |
| 20150025761 | MAGNETIC FIELD SENSOR, ACTUATING DEVICE AND METHOD FOR DETERMINING A RELATIVE POSITION - A magnetic field sensor consists of a transmitter device for producing a magnetic field and a detecting device for detecting the magnetic field. The transmitter device and the detecting device are arranged in such a way that they can move in relation to each other. The detecting device consists of a first sensor for producing a first sensor signal which is dependent on the magnetic field and a second sensor for producing a second sensor signal which is dependent on the magnetic field. The first sensor and the second sensor are arranged next to each other within the extension of a longitudinal axis of a detection range of a magnet in the transmitter device. | 01-22-2015 |
| 20150032347 | DOUBLE TRANSITION SHIFT CONTROL IN AN AUTOMATIC POWERSHIFTING TRANSMISSION - A system and method for controlling double transition shifts in an automatic transmission having multiple gear sections. During a double transition shift, the system performs simultaneous closed loop control of the primary oncoming clutch in the primary gear section and the secondary off-going clutch of the secondary gear section. Before the input shaft of the secondary gear section is fully pulled down or the secondary off-going clutch becomes overheated, the system switches closed loop control of the input shaft to the secondary on-coming clutch of the secondary gear section. The system utilizes model-based calculations to determine the initial clutch pressure settings when a clutch enters closed loop control. | 01-29-2015 |
| 20150032348 | INTEGRATED TRANSMISSION AND AUXILIARY GEARBOX CONTROL - A powertrain of a vehicle has a drive unit, a transmission and an auxiliary gearbox. Operation of the transmission and the auxiliary gearbox is controlled by a transmission control unit. The transmission control unit controls shifting of the auxiliary gearbox and the transmission while the vehicle is in operation. The auxiliary gearbox may be electronically shifted, independently of activity of the vehicle operator. | 01-29-2015 |
| 20150039196 | DETECTION OF AN EXHAUSTING CLUTCH IN A NEUTRAL IDLE-EQUIPPED TRANSMISSION - A transmission assembly for a vehicle includes a transmission and a controller. The transmission includes an input member, at least one clutch and gear set, and an output member. The input member receives an input torque from an engine. The output member receives an output torque from the clutch and gear set(s). The clutch and gear set(s) connect to the input member and establish a plurality of operating states including a neutral idle (NI) state. A designated NI clutch is selectively actuated to enter the NI state when the transmission is in a drive state and the vehicle is stationary. The controller calculates a reference slip error as a function of engine and turbine speed, and detects when the designated NI clutch is exhausting fluid while operating in the NI state using a function of the reference slip error. A control action executes when the exhausting NI clutch is detected. | 02-05-2015 |
| 20150051802 | TRANSMISSION APPARATUS - A transmission apparatus mounted on a vehicle has a front-wheel speed sensor for sensing a rotation speed of a front wheel. A control unit has a ratio-change correction part that determines a correction in transmission control of the transmission apparatus using the rotation speed of the front wheel sensed by a front-wheel speed sensor. The control unit limits execution of the correction under a condition that an external device is connected to a connector. Thereby, the execution of the correction based on the rotation speed of the front wheel without a worker's intention during driving on a chassis dynamo may be suppressed. | 02-19-2015 |
| 20150057900 | Method for Cutting Off a Gearshift in which at Least One Form-Fitting Shifting Element is Participating, in an Automatic Transmission of a Motor Vehicle - Within the framework of a method for terminating a gearshift for an automatic transmission for a motor vehicle, at which at least one positive-locking shifting element is involved, after the initiation of the gearshift, there is an evaluation of the continuous signals of at least one control unit of the vehicle, which affect the engine torque and thus the turbine speed gradient, whereas, based on the evaluation of the signals, an upcoming change to the turbine speed gradient that exceeds a first predetermined threshold value or falls short of a second predetermined threshold value is detected, and, upon the detection an upcoming change to the turbine speed gradient that exceeds the first predetermined threshold value or falls short of the second predetermined threshold value, the gearshift is terminated. | 02-26-2015 |
| 20150094920 | METHOD FOR DAMPING VEHICLE DRIVE TRAIN VIBRATIONS - A method for assuring that a signal, for damping drive train vibrations, is overlaid during the same time period as the drive train vibration, and not delayed by one time period. The method comprises the steps of continuously calculating a correction torque for the vibration damping, determining, through a parallel signal path, whether the vibration damping is to be activated or deactivated, and overlaying the correction torque to the drive train vibration, if the necessity arises for activation of the vibration damping. | 04-02-2015 |
| 20150094921 | Method and Apparatus for Controlling an Automatic Transmission - In a motor vehicle, the shifting characteristics for kick-down shifting for gear selection in the sense of a kick-down simulation are activated by at least one selection device by which the gears of the transmission can be manually shifted up and down in a manual mode, and by an electronic control unit that predetermines a gear selection for controlling the setting elements of the transmission as a function of the signals of the selection devices, of shifting characteristics, and of further input signals. For kick-down shifting, the further input signals are the activation of the selection device into the down-shift position that requests manual down-shifting and the holding of the selection device in this down-shift position for a predetermined period of time. | 04-02-2015 |
| 20150112560 | TORQUE-BASED SHIFTING - A computer-implemented shifting method for a vehicle is described. The method is based upon, at least in part, identifying a reference output torque at an output shaft associated with a transmission of the vehicle. The method includes reducing a torque capacity of an off-going output clutch from a starting capacity and determining a torque load for the off-going output clutch. The method includes maintaining a first transition torque capacity during a first transition period after the determining of the torque load, and increasing a torque capacity of the on-coming output clutch to a second transition torque capacity. The method includes maintaining the second transition torque during a second transition period. The method includes reducing the torque capacity of the off-going output clutch to a first final torque capacity and increasing the torque capacity of the on-coming output clutch to a final torque capacity. | 04-23-2015 |
| 20150142283 | SHIFT RANGE SWITCHING APPARATUS - There is provided a shift range switching apparatus that can perform appropriate fail-safe control when a power source supplied to an electronically controlled shift range switching apparatus is instantaneously interrupted. When due to instantaneous interruption of a power source supplied to the shift range switching apparatus, the shift range switching apparatus is reactivated, a target shift range is determined based on a rotation position of a detent plate detected by a detent position sensor immediately after the reactivation, and the rotation position of the detent plate is controlled. | 05-21-2015 |
| 20150337950 | HYDRAULIC SYSTEM CHARGE DETECTION - A vehicle includes a transmission, an electrically-driven fluid pump which supplies pressure to a hydraulically-actuated clutch of the transmission, and pump motor sensors positioned with respect to a pump motor of the fluid pump. The sensors are configured to measure electrical properties of the pump motor, and to output the measured electrical properties as input signals. A controller detects when the hydraulic circuit is fully charged by determining an actual speed of the pump motor. The controller calculates an average pump torque and a slope of the average pump torque for the pump motor using the input signals. A flag is set via the controller indicating that a calibrated line pressure has been attained in the hydraulic circuit when the slope of the average pump torque reaches zero and the speed of the pump motor reaches a calibrated speed. | 11-26-2015 |
| 20150354698 | CONTROLLING AN AUTOMATIC TRANSMISSION - A method of downshifting an automotive transmission. An on-coming transmission element is stroked while pressure for an off-going element is reduced. Pressure for the stroked on-coming element is increased to be sufficient to carry torque. Pressure for the off-going element is reduced below a torque transmitting amount once the stroked on-coming element has a sufficient torque carrying capacity. Torque capacities for the elements are determined from transmission output torque and acceleration and transmission input torque and acceleration. Feed forward or feedback terms for off-going and on-coming element torque capacities may be calculated using the transmission output torque, transmission input acceleration, and transmission input torque. | 12-10-2015 |
| 20160001655 | Drive Control System for Work Vehicle - A drive control system for a work vehicle is provided with a power transmission device that drives front wheels and rear wheels, a request determination unit, and a drive mode control unit. The power transmission device has a drive mode switching mechanism that performs drive mode switching between a four-wheel drive mode in which drive power is transmitted to front wheels and rear wheels and a two-wheel drive mode in which drive power is transmitted to only the rear wheels. The request determination unit determines a necessity for an increase in drive power on a contact area of the work vehicle, and outputs an increase request based on the determination result. The drive mode control unit outputs a drive mode switching request for switching to the four-wheel drive mode to the drive mode switching mechanism, in response to output of the increase request. | 01-07-2016 |
| 20160017996 | CLUTCH TORQUE TRAJECTORY CORRECTION TO PROVIDE TORQUE HOLE FILLING DURING A RATIO UPSHIFT - A multiple ratio transmission having an input shaft, an output shaft and oncoming clutch and off-going clutch for effecting ratio upshifts is provided. The transmission also includes a transmission controller configured for controlling shifts. During the torque phase of a ratio upshift, the controller increases input torque. Next, the controller estimates an oncoming clutch target torque. The controller controls a torque input to ensure the off-going clutch remains locked. The controller measures an actual transmission value for a torque transmitting element of the transmission and corrects the oncoming clutch target torque using the actual transmission value whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients along the output shaft during the upshift. | 01-21-2016 |
| 20160039403 | DEVICE AND METHOD FOR CONTROLLING LIMITED SLIP DIFFERENTIAL - In a control device for a limited slip differential that limits a differential operation of front and rear wheels of a four-wheel-drive vehicle having mounted thereon a vehicle behavior control device that controls a braking force, an ECU that controls a torque coupling as the limited slip differential includes: a differential limiting force calculating device that calculates target torque of the torque coupling based on a vehicle traveling state; a differential limiting force correcting device that makes a correction to reduce the target torque based on a command from the vehicle behavior control device; and a thermal load calculating device that calculates a thermal load of the torque coupling. The differential limiting force correcting device limits the correction of the target torque based on the command from the vehicle behavior control device, when the thermal load of the torque coupling is equal to or larger than a predetermined value. | 02-11-2016 |
| 20160039496 | COMPONENTS, SYSTEMS AND METHODS OF BICYCLE-BASED NETWORK CONNECTIVITY AND METHODS FOR CONTROLLING A BICYCLE HAVING NETWORK CONNECTIVITY - A bicycle configured for communication with other bicycles, a centralized server, client computing devices and third party servers allows the rider to be connected with friends, coaches/trainers, and third party vendors including vendors associated with lodging, food, and other conveniences, vendors associated with bike servicing, equipment, warranties, and other bike related products and services, and vendors associated with routes, areas or destinations. Information may be communicated in real time or stored in memory and communicated to servers, client devices, other riders, etc., at a later date. Information may be communicated to the bike controller for route planning, service scheduling, training purposes and the like. Information communicated to or from the bicycle may be performed as indicated by the rider or there may be predetermined rules or guidelines for what information is collected and to whom the information may be sent to or received from. | 02-11-2016 |
| 20160047465 | METHOD OF CONTROLLING AUTOMATIC TRANSMISSION FOR REDUCING SYNCHRONIZATION SHOCK DURING UPSHIFT IN ACCELERATED STATE - A method of controlling an automatic transmission for reducing synchronization shock during an upshift in an accelerated state may include determining a shift progress rate, performing shift progress rate determination of determining whether the determined shift progress rate is higher than a certain value, performing PID control of a release element when the shift progress rate is determined to be higher than the certain value, performing release element-shared torque determination of determining whether a shared torque of the release element is higher than 0, and reflecting the PID control in the release element when the shared torque of the release element is determined to be higher than 0. | 02-18-2016 |
| 20160061319 | OUTPUT TORQUE CONTROL METHOD - Readings of multiple sensors are utilized to estimate transmission output, which is used as a feedback signal to control the torque capacity of a transmission clutch. Some sensor readings, such as transmission output speed, are used to compute an input vector. Then, a current state vector is computed as a linear function of the previous state vector and the input vector. One of the values in the state vector is shaft twist, which is proportional to transmission output torque. Various other sensor readings, including wheel speed, are used to correct for noise. Wheel speed signals are received with a delay. To accommodate this delay, the state vector is expanded to include estimates of wheel speed at various past points in time. An accelerometer reading is used at very low speeds at which the wheel speed sensor and transmission output speed sensor are unreliable. | 03-03-2016 |
| 20160114803 | Clutch Torque Trajectory Correction to Provide Torque Hole Filling during a Ratio Upshift - A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced. | 04-28-2016 |
| 20170232949 | METHOD AND APPARATUS TO MONITOR A TEMPERATURE SENSOR | 08-17-2017 |
