Entries |
Document | Title | Date |
20080243346 | Method and apparatus for controlling power flow in a hybrid powertrain system - There is described hybrid powertrain operation and control. Preferred power flows from an engine to an electromechanical transmission and from an energy storage system to an electric machine are determined based upon an operator torque request. Operation of the engine, the electric machine, and the electromechanical transmission are controlled to substantially meet the operator torque request. Actual power flow from the energy storage device is monitored. The power flow from the engine is adjusted based upon a difference between the actual and preferred power flows from the energy storage device. | 10-02-2008 |
20080288145 | Powertrain control apparatus and method, and program for implementing the control method - In a control apparatus for a powertrain that includes an automatic transmission, occurrence of slip in a one-way clutch is determined when one gear is formed if a first rotation member and a second rotation member of the one-way clutch rotate relatively. If slip in the one-way clutch is detected, it is determined whether the rotational speed difference between the first rotation member and the second rotation member has increased. If the rotational speed difference between the first rotation member and the second rotation member has increased when slip is detected in the one-way clutch, a control is executed to engage a predetermined frictional engagement element. | 11-20-2008 |
20090118916 | METHOD TO MANAGE A HIGH VOLTAGE SYSTEM IN A HYBRID POWERTRAIN SYSTEM - A powertrain includes an electromechanical transmission operative to transmit torque between an input member and an electric machine and an output member to transmit tractive torque. The electric machine is electrically connected to an inverter device which is electrically connected to an energy storage device. A method for operating the powertrain includes detecting a shutdown event, commanding the transmission to neutral, commanding the electric machine to cease operating in a torque generating mode, and electrically disconnecting the energy storage device from the inverter device. | 05-07-2009 |
20090132134 | DYNAMICALLY ADJUSTABLE INCH/BRAKE OVERLAP FOR VEHICLE TRANSMISSION CONTROL - A motorized vehicle includes a transmission system and an inch/brake device providing at least two ranges of motion. An engagement force of the transmission system is provided in a first range of motion of the inch/brake device, and a braking force of the motorized vehicle is provided in a second range of motion of the inch/brake device. An accelerator device moves between two or more positions, wherein moving the accelerator device from one position to another position causes an amount of overlap between the first and second ranges of motion of the inch/brake device to vary. | 05-21-2009 |
20090150034 | Automatic Brake Control Device - A stepwise brake control is automatically performed when TTC obtained according to a relative distance and a relative speed between a vehicle and an object is lower than a predetermined value. For example, a brake force or a brake reduction speed is gradually increased over a plurality of stages in time series. Moreover, the affect of speed change control to the automatic brake control is removed. Alternatively, automatic brake control is supported by the speed change control. Alternatively, the friction coefficient state is estimated, and the brake force or the brake speed reduction is adjusted according to the estimated result. Alternatively, an auto-cruse function is invalidated at least the final stage. Alternatively, when the brake force or the brake speed reduction generated by a brake operation by a driver is greater than the brake force or the brake speed reduction generated by the brake control means, the brake operation by the driver is handled with a higher priority than the stepwise brake control. | 06-11-2009 |
20090157268 | Method of detecting an object near a vehicle - A method of detecting an object in or near a path of a vehicle utilizes object detection and warning system, including one or more cameras mounted to the vehicle. The method includes taking a first image with a camera when the vehicle is operated in a first predetermined manner, taking a second image with the camera when the vehicle is operated in a second predetermined manner, comparing the second image with the first image, and operating the system based on the compared first and second images. The method may further include storing a plurality of first images in a memory and comparing the second image with one of the first images stored in the memory. The method may further include alerting a vehicle driver when the object is detected, disabling the vehicle and then enabling the vehicle when no object is in a potential path of the vehicle. | 06-18-2009 |
20090192683 | Vehicle control device, vehicle control method and computer program - An anti-collision control is provided under circumstances where it is determined that there is a risk of collision between a host vehicle and a preceding vehicle. The anti-collision control utilizes host vehicle information, preceding vehicle information, and surrounding road conditions to determine whether or not a collision with the preceding vehicle can be avoided through a steering operation. If avoidance is determined to be possible, then a shift-hold control is applied to the AT, whereas if avoidance is determined to be impossible, then a down-shift control is applied to the AT. | 07-30-2009 |
20100131159 | METHOD OF CONTROLLING A VTG ENGINE - When controlling an engine provided with Variable Turbine Geometry (VTG), the VTG is closed to a maximally acceptable closed position without endangering the VTG when performing an up-shift. The VTG is kept in such a position during the gear shift which, allows for a quick retardation of the engine speed. | 05-27-2010 |
20100152982 | FLYWHEEL DRIVELINE AND CONTROL ARRANGEMENT - In an energy storage and recovery system for a hybrid vehicle | 06-17-2010 |
20100185368 | METHOD AND DEVICE FOR CONTROLLING A COASTING MOVEMENT OF A VEHICLE - From a point when the clutch is disengaged, a braking torque is applied in addition to the braking torque of the drivetrain located downstream from the clutch. The braking torque of the drivetrain downstream from the clutch comprises, for example, a drag torques of the transmission, an axle and/or one or more brakes. The added braking torque applied corresponds to the braking torque of the internal combustion engine at, or immediately before, the instant when the internal combustion engine is decoupled from the drivetrain downstream from the clutch by disengaging the clutch. By applying the additional braking torque to the drivetrain downstream from the clutch, the total braking torque that acts on the wheel, before and after the disengagement of the clutch, remains the same. The vehicle can therefore coast or stop in a smooth manner. | 07-22-2010 |
20100211274 | BRAKING FORCE CONTROL APPARATUS FOR VEHICLE - A braking force control apparatus for a vehicle is provided with a brake device that brakes a rotation of a drive wheel of a vehicle equipped with a continuously variable transmission and adjusts a magnitude of a braking force acting upon the drive wheel on the basis of a brake depression amount. The braking force control apparatus includes a controller that is configured to set an upper limit value of the braking force of the brake device when a restriction condition that is a condition, at which an excessively large torque input state occurs, has been estimated to be established, the excessively large torque input state being a state in which a reduced speed of the drive wheel based on the braking force is larger than an allowable limit speed. | 08-19-2010 |
20100222972 | Method and Apparatus for Shift-by-Wire in a Motor Vehicle - A vehicle includes a motor responsive to a first electronic control signal to transition between an active state and an inactive state and a transmission responsive to a second electronic control signal to transition between at least a reverse state, a neutral state and a drive state. A user-actuated control is mounted to an interior surface in the passenger compartment of the vehicle. The control has at least one contact surface that contacts the user when the user operates the control, wherein the contact surface is integrated with a logo. A circuit is coupled to the control to generate at least one of the first electronic control signal and the second electronic control signal in response to user actuation of the control. | 09-02-2010 |
20100292900 | CONTROL APPARATUS AND CONTROL METHOD FOR CONTINUOUSLY VARIABLE TRANSMISSION - In order to suppress the clutch applying shocks at a garage shift time of a continuously variable transmission equipped with a hydraulic type forward-backward switching device, an ECU starts a timer of a predetermined time period, when the engine starts. If the garage shift occurs before a timer-up, the ECU starts a standby oil pressure control to feed the forward-backward switching device with a standby oil pressure lowered to such a level as to leave the forward-backward switching device unapplied. The ECU calculates a first fill hydraulic value in accordance with the time period from the engine start to the garage shift operation. After the time up, the ECU ends the standby oil pressure control, and executes a first fill control at the first fill hydraulic value calculated. | 11-18-2010 |
20110004380 | CLUTCH CONTROL DEVICE AND CORRECTION COEFFICIENT CALCULATING METHOD - Actual-rotational-difference absorption-torque calculation means | 01-06-2011 |
20110106387 | CVT CONTROL APPARATUS - In an apparatus for controlling a CVT that transmits power of an engine to driven wheels with hydraulic clamping pressure supplied from a hydraulic mechanism to clamp the belt from laterally-sided pulleys, it is determined whether the ABS operation of the ABS mechanism (to reduce braking force to be applied to the driven wheels when the driven wheels are locked) is delayed, and set hydraulic clamping pressure is increased when the ABS operation is determined to be delayed, while the set clamping pressure is maintained as it is when the operation of the ABS mechanism is determined to be not delayed. | 05-05-2011 |
20110218719 | POWERTRAIN OF A VEHICLE AND A METHOD OF OPERATING A POWERTRAIN OF A VEHICLE FOR CLUTCH PROTECTION - A powertrain of a vehicle includes, but is not limited to a prime drive coupleable to a multi-speed transmission by actuation of one or more clutches and a system for operating the powertrain for clutch protection. The system includes, but is not limited to an estimator for estimating the thermal load on the clutch from drive resistance of the vehicle and the torque deliverable by the prime drive at a sensed position of the throttle and an apparatus for increasing the torque delivered by the prime drive to above the estimated torque at the sensed position of the throttle to reduce the thermal load on the clutch if the estimated thermal load on the clutch is higher than the predetermined threshold. | 09-08-2011 |
20110257853 | DRIVER ASSISTANCE SYSTEM AND METHOD FOR ADJUSTING A DRIVER ASSISTANCE SYSTEM - A driver assistance system has braking devices at the wheels of a driven vehicle axle as well as an active locking differential. In a regulation or control unit, braking or locking torques are determined, a distribution module being connected downstream from the regulation or control unit, in which module actuating signals can be produced in order to control the braking devices and the locking differential. | 10-20-2011 |
20110264339 | ACCUMULATOR WORKING VOLUME MANAGEMENT AND ADAPTATION - A dual clutch transmission (DCT) control module includes a pressure determination module that determines a measured pre-charge pressure of an accumulator. A motor control module determines an actual pre-charge pressure based on the measured pre-charge pressure, stored previous pre-charge pressures, and ambient temperature, and controls a pump motor based on the actual pre-charge pressure. | 10-27-2011 |
20110264340 | AUTOMATIC TRANSMISSION FOR VEHICLE - Provided is an automatic transmission for a vehicle, and more particularly, an automatic transmission for a vehicle which controls a clutch actuator to operate a clutch for forward and reverse operations of the vehicle and for changing running speeds so as to interrupt engine power transmission, thereby automating inconvenient clutch manipulations. The automatic transmission for a vehicle which changes a rotation direction of power and a rotation speed range from an engine, includes: a forward/reverse shifter for changing the rotation direction of the power transmitted from the engine; a running speed shifter for changing a rotation speed range of the forward/reverse shifter; a main shifting actuator for driving the running speed shifter; a clutch for selectively interrupting the power transmitted from the engine during a shifting procedure of the running speed shifter; a clutch actuator for driving the clutch; and a controller for driving the clutch by controlling the clutch actuator to interrupt the power transmitted from the engine when a shift signal for the running speed shifter is input, for driving the running speed shifter by controlling the main shifting actuator, and when the shifting procedure is completed, for controlling the clutch actuator again to return the clutch to its initial position. | 10-27-2011 |
20110264341 | Method And Device For Controlling A Drive Train - A method for controlling a drive train with at least one drive unit, in particular for a vehicle is disclosed. A setpoint value for a torque of the at least one drive unit can be predefined. The actual value of this torque is detected and a first signal is generated which ensures reliable operation of the drive train if the deviation of the actual value from the setpoint value is greater than a predefinable absolute value of the deviation value and/or the deviation of the actual value from the setpoint value lasts for longer than a predefinable absolute value of the deviation time period. | 10-27-2011 |
20120046840 | METHODS AND SYSTEMS FOR VEHICLE CONTROL DURING BRAKING OF THE VEHICLE - Methods and systems are provided for vehicle control during braking for vehicles having a transmission gear movable between at least a drive position and a neutral position. A wheel speed sensor measures a wheel speed of the wheel. A controller is coupled to the wheel speed sensor. The controller calculates a parameter using the wheel speed, and shifts the transmission gear from the drive position to the neutral position if the parameter exceeds a predetermined threshold. The parameter is indicative of a load on a component of the vehicle. | 02-23-2012 |
20120065849 | SYSTEM AND METHOD FOR CONTROLLING POWER DOWNSHIFTS OF A TRANSMISSION - A system for controlling power downshifts of a transmission includes a flare generation module, a flare control module, and a shift control module. The flare generation module generates turbine speed flare by decreasing pressure applied to an off-going clutch of the transmission. The flare control module decreases the turbine speed flare by increasing the pressure applied to the off-going clutch of the transmission. The shift control module increases a pressure applied to an on-coming clutch of the transmission when the turbine speed flare is less than a predetermined amount from a desired turbine speed flare. | 03-15-2012 |
20120065850 | VEHICLE BEHAVIOR CONTROL APPARATUS - An engine driving force is calculated. A first-lag process is executed based upon the engine driving force to calculate an engaging torque between front and rear shafts. The resultant is output to a transfer clutch drive unit. A braking force according to a change of a driving force, which is decreased with the lapse of time based upon a temporal change of the engine driving force, is calculated by executing a first-order lead process. An acceleration sensitive target yaw moment based upon the braking force according to the change of the driving force is calculated, and a steering sensitive target yaw moment based upon a steering angle velocity is calculated by executing the first-order lead process. A braking force to be added to an inner wheel on a turn is calculated based upon these target yaw moment. The resultant is output to a brake drive unit. | 03-15-2012 |
20120072083 | CONTROL APPARATUS AND CONTROL METHOD FOR VEHICLE - When initial drive control for an actuator driving a shift switch mechanism is completed, a P-ECU determines whether an IG signal is received. In the case where the P-ECU has not received the IG signal at the time when the initial drive control is completed, the P-ECU temporarily keeps the actuator in a state where the initial drive control is completed. In the case where the P-ECU receives the IG signal in the period from completion of the initial drive control to the time when a predetermined time T | 03-22-2012 |
20120078478 | Control of Automatic Transmission Shift by Wire Range Selection - A method for controlling a transmission includes using actuation of a button of a shift module to produce a signal representing a desired gear, using the signal and a second signal commanding a park range to determining a priority range, using a shift mechanism to attempt engagement of the transmission in the priority range, and if the priority range is park and park is not engaged, engaging a park brake. | 03-29-2012 |
20120095657 | ROCKING ENABLED SHIFT-BY-WIRE SYSTEM - A shift-by-wire system includes an incremental shift interface that generates an incremental shift signal. A rock control module enables a rocking mode and generates a rock control signal based on status of a vehicle parameter. The rocking mode includes shifting between a first mode and a second mode and back to the first mode. The first mode is one of a reverse mode and a drive mode and the second mode is the other one of the reverse mode and the drive mode. A shift interface module generates a shift control signal to shift a transmission of a vehicle between the first mode and the second mode based on the incremental shift signal and the rock control signal. | 04-19-2012 |
20120101698 | METHOD AND DEVICE FOR CONTROLLING A VEHICLE CRUISE CONTROL - A method and device are provided for controlling a vehicle cruise control in a vehicle, the method including registering a starting point and an end destination for a possible traveling route of the vehicle, registering a desired traveling time for the traveling route, calculating and setting limits for parameters of the cruise control in order to arrive at the end destination on the desired traveling time with as low fuel consumption as possible. | 04-26-2012 |
20120136543 | APPARATUS FOR PARKING CONTROL OF AUTOMATIC TRANSMISSION VEHICLE AND METHOD THEREOF - An apparatus for parking control of an automatic transmission vehicle may include a speed detector that provides a controller with a vehicle speed, a shift lever detector that provides the controller with a position of a shift lever, the controller that analyses the vehicle speed and the position of the shift lever, and supplies a predetermined hydraulic pressure to brake elements and clutch elements in order to create drag on a parking gear shaft in conversion into a parking mode, and an actuator that supplies the hydraulic pressure to the clutch elements and the brake elements or discharges the hydraulic pressure from the clutch elements and the brake elements according to the control of the controller. | 05-31-2012 |
20120158260 | Automatic Transmission and Method of Control for Rejecting Erroneous Torque Measurements - A method for an automatic transmission includes measuring torque of a component of the transmission using a torque sensor in communication with the component. The torque of the component is estimated from information other than the measured torque. The measured torque is rejected from being used in a control operation of the transmission if the difference between the measured torque and the estimated torque is greater than a selected threshold. | 06-21-2012 |
20120173099 | METHOD AND SYSTEM FOR SETTING A VEHICLE IN MOTION - A method for setting a vehicle in motion: The vehicle includes a combustion engine for generating driving force for transmission to at least one powered wheel via a clutch and a gearbox. The driving force is selectively transmitted from the engine to the powered wheels by closure of the clutch. Gear changes by the gearbox are at least partly controlled by a control system. With the clutch closed and upon demand for the vehicle to be set in motion with the clutch closed, the control system activates the vehicle's starter motor with gear engaged, and uses the starter motor to accelerate the combustion engine to an initial speed which represents a speed at which the combustion engine will start. | 07-05-2012 |
20120197502 | SYSTEM AND METHOD FOR CONTROLLING SOLENOID PRESSURE - A system for calibrating an input electrical signal to an individual pressure control device includes the steps of providing a target pressure-to-current (P/I) threshold, providing a lower estimated P/I threshold, and providing an estimated P/I curve that passes between the target P/I threshold and the lower estimated P/I threshold. Next, the method determines a lower actual P/I threshold at a pressure equal to the pressure at the lower estimated P/I threshold. A maximum offset current is calculated from the difference between the currents at the lower actual P/I threshold and the lower estimated P/I threshold. Finally, the system calculates a calibrated P/I curve. The calibrated P/I curve includes the target P/I threshold and the lower actual P/I threshold. The slope of the calibrated P/I curve is calculated as a proportional value of the maximum offset current. | 08-02-2012 |
20120239264 | SPEED CHANGE CONTROLLING APPARATUS FOR MOTORCYCLE - A speed change controlling apparatus in which the mode of driving force transmission is depends upon the roll angle of a vehicle body. When a roll angle is within a range from a second roll angle, which corresponds to a full bank state, to a first roll angle, speed change operation is carried out by soft speed change control in which variation of the driving force with respect to time is smaller than that by normal speed change control. If the roll angle is within another range from the first roll angle to a third roll angle, then normal speed change is carried out and if the roll angle is within a further range from an uprightly standing state to the third roll angle, then speed change operation is executed by direct speed change. When the roll angle is greater than the second roll angle, speed change is inhibited. | 09-20-2012 |
20120316738 | 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. | 12-13-2012 |
20120316739 | ALARM APPARATUS FOR AUTOMATIC TRANSMISSION USING PEDAL FORCE OF ACCELERATOR PEDAL AND METHOD FOR CONTROLLING THE SAME - An alarm apparatus for an automatic transmission may include a transmission control unit (TCU) controlling the automatic transmission of a vehicle, an accelerator pedal unit, a driving unit driving the accelerator pedal unit to perform a predetermined operation, and a control unit interworking with the TCU and controlling the driving unit such that the accelerator pedal unit performs the predetermined operation at a predetermined time before a speed change time, when the speed change time calculated and outputted by the TCU may be inputted to the control unit. | 12-13-2012 |
20130006487 | METHOD FOR CONTROLLING ENGINE TEMPERATURE OF AN ENGINE - A method for controlling engine temperature of an engine with a wide dynamic range is disclosed. In one example, the derivative of an engine temperature is assessed by a controller. The controller may adjust engine actuators to limit engine temperature in response to the derivative. | 01-03-2013 |
20130054098 | SYSTEM FOR ALLOCATING TRANSMISSION CLUTCH WEAR - A control system for a transmission engages three clutches to create braking within the transmission to slow a machine during a shuttle shifting operation. The control system may apply the clutches so as to allocate wear between the clutches equally or unequally, as desired. | 02-28-2013 |
20130054099 | SYSTEM FOR ALLOCATING TRANSMISSION CLUTCH WEAR - A control system for a transmission engages at least three clutches to create braking within the transmission to slow a machine during a shuttle shifting operation. The control system may apply the clutches so as to allocate wear between the clutches equally or unequally, as desired. | 02-28-2013 |
20130060433 | BRAKE CONTROL DEVICE - When the vehicle decelerates on the ascending slope, a required brake axle torque is calculated in accordance with vehicle deceleration, so that the swinging back is suppressed. At start timing after that, initial and final values of the required brake axle torque and a correction duration are determined. During the correction duration from the start timing, the required brake axle torque is decreased from the initial value to the final value. Then, based on change in a detected vehicular speed at or before a time which is a last moment of a period in which the detected vehicular speed detected based on detection signals of the wheel speed sensors are equal to or larger than a minimum detectable vehicular speed, a stop time at which an actual vehicle speed becomes zero is estimated, a period from the start time to the stop time is identified as the correction duration. | 03-07-2013 |
20130096786 | CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION AND METHOD THEREOF - The control system for an automatic transmission may include, a detecting portion of driving information adapted to detect the driving information including a temperature of an engine coolant, temperature of a transmission oil, a positional change of an accelerator pedal, a current shift-speed, and driving speed. a control portion adapted to determine a virtual positional change of the accelerator pedal based on an actual positional change of the accelerator pedal and a tip-in speed transmitted from the detecting portion of driving information, to determine a target shift-speed according to the actual positional change of the accelerator pedal or the virtual positional change of the accelerator pedal and the driving speed, and to control a shift to the target shift-speed. an actuator adapted to engage the target shift-speed according to a control signal received from the control portion. | 04-18-2013 |
20130131939 | CONTROL TECHNIQUE FOR VEHICLE WITH SHIFT BY WIRE SYSTEM - Disclosed is a control technique that prevents a transmission automatically decelerates a vehicle when an ignition in the vehicle is turned off accidentally while the vehicle is moving and waits until the vehicle is completely stopped to automatically shift and lock the transmission of the vehicle in Park electronically. | 05-23-2013 |
20130166160 | Method of Aligning a Transmission Synchronizer - A method of detecting synchronizer misalignment in a vehicle transmission, includes: applying an engagement force to an input side of a synchronizer or output side of the synchronizer; monitoring a performance characteristic of a power source configured to apply the engagement force; and determining a misalignment based on the performance characteristic exceeding or not achieving a predetermined threshold. | 06-27-2013 |
20130179044 | CONTROL APPARATUS FOR VEHICLE AUTOMATIC TRANSMISSION - A sport running estimated value LEVELSP obtained by searching a value on a map prepared in advance based on an average values AGYAVE of lateral accelerations GY of a vehicle and on average values of vehicle speed changes is calculated, and a vehicle speed on a shift map is searched based on the sport running estimated value LEVELSP and an estimated value DA of a vehicle gradient, whereby a downshift vehicle speed VA at which a downshift is implemented is calculated. Then, the downshift is implemented in a case where actuation of a brake is detected, deceleration of the vehicle is a predetermined value or more, and a current vehicle speed is a downshift vehicle speed VA or more. In such a way, running on a meandering road, for which the downshift and a subsequent shift hold should be implemented, is sensed appropriately. | 07-11-2013 |
20130179045 | METHOD FOR CONTROLLING SHIFTING IN A SEMI-AUTOMATIC GEAR TRANSMISSION - A method of shift control for an automatic transmission of vehicle power train, having a permanent brake between a drive motor and a final drive, in which current vehicle-specific, road-specific and driver-specific operating parameters, topographical data relating to an upcoming stretch of road ahead of the vehicle are determined while driving, and from which a tractive resistance value for the upcoming stretch of road is determined, and control commands for thrust downshifts and/or upshifts are derived and implemented, within the transmission, during a thrust operation depending upon the tractive resistance value. This is achieved in that the maximum permanent braking force curves that are possible for the upcoming stretch of road, in the currently engaged gear, and each adjacent gear is determined based on the current traveling and engine speeds and analyzed to derive control commands for a thrust downshift and/or upshift in relation to the tractive resistance value. | 07-11-2013 |
20130211680 | Method for Setting the Working Pressure of a Transmission - The invention relates to a method for setting the operating pressure of a transmission, in particular a motor vehicle shift transmission, the transmission having clutches, brakes, actuators, a hydrodynamic clutch, and/or a hydrodynamic converter, to which a medium that conducts the operating pressure can alternately be applied in order to vary the transmission ratio of the speed and/or the torque between a transmission input shaft and a transmission output shaft by opening and closing the clutches and/or brakes, by actuating the actuators, and/or by hydrodynamic power transmission using the hydrodynamic clutch and/or the hydrodynamic converter, the operating pressure being switchable between a constant nominal value and a constant decreased value smaller in relation thereto, or the operating pressure being reducible in three or more steps or continuously from a nominal value to a decreased value. | 08-15-2013 |
20130253785 | OIL PRESSURE CONTROL SYSTEM OF AUTOMATIC TRANSMISSION FOR VEHICLE - An oil pressure control system of an automatic transmission for a vehicle includes a lock-up clutch, a TC regulator valve, an LC control valve, an LC shift valve, an oil cooler, a control area determination device, a torque transmission capacity calculator, a high load state determination device, and an oil pressure controller. The oil pressure controller is configured to control a TC regulator pressure outputted by a TC regulator valve, so that a torque transmission capacity of a lock-up clutch is greater than a reference torque transmission capacity calculated by the torque transmission capacity calculator, if a control area determined by the control area determination device is a complete engagement area and the high load state determination device determines that an operational state is in a high load state. | 09-26-2013 |
20130261908 | APPARATUS AND METHOD FOR AUTOMATICALLY CONTROLLING A TRANSMISSION OF A WHEEL LOADER - An aspect of the present disclosure has been made in an effort to provide an apparatus and a method of automatically controlling a transmission, capable of increasing work efficiency by removing a time gap between a starting time point when an operation such as excavation of a wheel loader starts and a transmission time point when the kickdown is performed. In addition, an aspect of the present disclosure has been made in an effort to provide an apparatus and a method of automatically controlling a transmission, capable of performing an automatic kickdown transmission at the same time of the starting time point of operation, preferably before the operation is performed. | 10-03-2013 |
20130268167 | APPARATUS AND METHOD FOR CONTROLLING TRANSMISSION CUT-OFF OF HEAVY CONSTRUCTION EQUIPMENT - An apparatus for controlling transmission cut-off of heavy construction equipment according to the present disclosure includes: a displacement sensor which detects a boom height; a vehicle control unit (VCU) to which a detected signal of the displacement sensor is input; a transmission control unit (TCU) which is connected with the vehicle control unit and controls a transmission clutch cut-off function; a driving control proportion valve block (transmission valve assembly) which is connected with the transmission control unit and performs a driving control; and a brake press sensor which is connected with the transmission control unit and detects a brake pedal pressure. | 10-10-2013 |
20130304336 | TRANSMISSION CREEP CONTROL - A transmission control system and method for controlling the level of creep torque supplied by a powertrain. The transmission control system having a controller configured to receive output signals from any one of a driver interface device sensor, a grade sensor, and a brake pedal sensor. Based on the output signals, the level of necessary creep torque and be determined and supplied, reducing unnecessary fuel consumption. | 11-14-2013 |
20130345940 | METHOD AND SYSTEM FOR DETERMINATION OF A NEED FOR CONTACT POINT ADAPTATION - A method for determining a need for contact point adaptation for a clutch ( | 12-26-2013 |
20140019020 | METHOD FOR CONTROLLING A GEAR BRAKE FOR AN AUTOMATED CHANGE-SPEED GEARBOX - A method of controlling a transmission brake of an automated change-speed transmission having a control cylinder, that is pressurized by inlet and outlet valves, and an upstream main cut-off valve by which a nominal pressure, supplied to the control cylinder, is regulated. Functional deviations of the transmission brake can be considered during a shifting operation, when the transmission is in neutral, the motor coupling clutch is disengaged and the transmission brake is engaged. The rotational speed gradient and the mass of the transmission components to be braked are determined and used to calculate the current braking torque of the transmission brake. The current braking torque relates to the current regulated nominal pressure, and the determined values are stored in a control unit and used during subsequent actuation of the transmission brake. | 01-16-2014 |
20140032063 | CLUTCH RETURN SPRING PRESSURE LEARNING DURING A COASTING MANEUVER - A method of learning the return spring pressure of a clutch in a vehicle having an engine and an automatic transmission includes selecting a clutch for analysis from a plurality of clutches of the transmission when the vehicle coasts for a predetermined duration. The method includes ramping down clutch pressure to the selected clutch until engine speed reaches idle and measuring the clutch pressure for the selected clutch after engine speed has remained at idle for a calibrated duration. An actual return spring pressure may be calculated as a function of the preliminary return spring pressure. The actual return spring pressure may be used thereafter to control a subsequent shift event of the transmission. A vehicle includes an engine, transmission, and controller configured to detect a predetermined coasting condition, and to execute code using a processor to thereby execute the above method. A system includes the transmission and controller. | 01-30-2014 |
20140046555 | GEAR BOX - A gearbox has a first shaft with at least two journalled gearwheels, a first gearwheel to drive the first shaft in a first direction and a second gearwheel to drive the first shaft in a second direction. Devices selectively lock the gearwheels situated on the first shaft for joint rotation. A second has at least two fixed gearwheels, one second gearwheel cooperates with the first gearwheel for operation in the first direction. A third shaft with a third gearwheel which selectively in or out of engagement with the first and second gearwheels for operation in the first direction. The first gearwheel intended for operation in the first direction is also in engagement with one or more further power-transmitting device used for connecting at least one form of extra equipment, e.g. a retarder or a power take-off. | 02-13-2014 |
20140052353 | Supervisory Thermal Management System and Method for Engine System Warm up and Regeneration - This disclosure provides a thermal management system and method that can recommend operational behavior to an operator of an engine system to optimize fuel economy over a period of time in which a components of the engine system is in a warm up and/or regeneration state. In one representative embodiment, the expected temperature change of the engine component at a later time is determined based on inefficient operation of the engine, such as a transmission down shift resulting in higher engine speed and lower engine torque, and the expected temperature change of the engine component resulting from operating the engine under current conditions or expected conditions at that later time is determined. A determination is made as to whether the inefficient engine operation is the optimal operation in view of fuel economy and a recommendation is generated for the operator based if optimal operation is determined. | 02-20-2014 |
20140052354 | Vehicle Transmission With Clutch Pack Overrun - A drive system ( | 02-20-2014 |
20140081539 | METHOD TO CONTROL A TRANSMISSION BRAKE - A method of controlling a transmission brake of an automated change-speed transmission, of a countershaft design provided with claw clutches, the brake being functionally connected, on its input side, to a transmission shaft and actuated hydraulically or pneumatically by way of inlet and outlet valves such that, for an upshift from a gear under load to a target gear, when the loaded gear is disengaged, in order to synchronize the target gear, first the inlet valve is opened and the outlet valve is closed, then to produce a substantially constant braking torque, the inlet valve is closed after having been open for a determinable opening duration, and to reach a synchronous rotational speed, the outlet valve is opened after having been closed for a determinable closing duration. The time during which the inlet valve is open is determined as a function of a specified characteristic parameter of the synchronization process. | 03-20-2014 |
20140088842 | SYSTEM AND METHOD FOR CONTROLLING AN AUTOMATIC STOP-START - A system and method are provided for controlling an automatic engine stop-start in conjunction with a transmission having one or more latching valves. The system and method is configured to determine whether conditions are met for an autostop, and if so, to latch or unlatch the latching valve(s) by changing clutch pressure. | 03-27-2014 |
20140100747 | SHIFT-BY-WIRE SELECTOR CONTROL SYSTEM FOR A MOTOR VEHICLE TRANSMISSION - A method for operating a multi-stable shift-by wire selector control system of a motor vehicle transmission. The multi-stable shift-by wire selector control system includes a multi-stable selector which is operable by the driver of the vehicle to select a respective one of the operating modes of the transmission, an arrangement of illuminated labels indicating the selector mode and an indexing mechanism for maintaining the immobilization of the selector in its different positions. | 04-10-2014 |
20140121914 | ACCELERATION-BASED STATE CONTROL OF A BINARY CLUTCH ASSEMBLY - A vehicle includes an engine and transmission having gear sets, an input member that is continuously connected to the engine and a gear set, a binary clutch assembly, a speed sensor, and a controller. The binary clutch assembly includes a freewheeling element holding torque in one rotational direction, and also a selectable one-way clutch (SOWC) portion holding torque in two rotational directions when applied. The controller executes a method to transmit a first binary clutch command to the binary clutch assembly and thus apply the SOWC portion at vehicle launch, and calculates, via the processor, an acceleration value of the vehicle using the measured speed. The controller also selects a shift apply point of the binary clutch assembly as a function of the calculated acceleration value, and transmits a second binary clutch command to the binary clutch assembly to release the SOWC portion at the selected shift apply point. | 05-01-2014 |
20140121915 | VEHICLE BRAKE CONTROL SYSTEM - A vehicle brake control system includes a clutch stroke acquiring section, a braking force holding section, a first release determination section, and a release execution section. The clutch stroke acquiring section acquires a clutch stroke. The braking force holding section holds a braking force imparted to a wheel brake of a vehicle being at a halt. The first release determination section includes a peak value holding part and a returned amount calculator. The peak value holding part holds a peak value of the clutch stroke. The returned amount calculator calculates a returned amount by which a clutch is returned from the peak value. The first release determination section determines whether or not the held braking force should be released, based on the calculated returned amount. If the first release determination section determines that the held braking force should be released, the release execution section releases the held braking force. | 05-01-2014 |
20140142820 | Adjustable Control Of Power Take-Off Subsystem Damping And System Thereof - The present disclosure provides a method for controlling a power take-off assembly. The method includes providing a drive unit, a transmission having an output, a speed sensor, a controller including a memory unit and a processor, and the power take-off assembly including a clutch and a solenoid. The method also includes storing a first threshold in the memory unit, determining a current input speed of the drive unit with the speed sensor, and comparing the current input speed to the first threshold. The method further includes controlling an amount of hydraulic pressure supplied to the clutch and engaging the clutch. | 05-22-2014 |
20140188353 | ROTARY POWER TRANSMISSION JOINT WITH AN INTEGRATED WIRELESS SENSOR - An assembly for acquiring operational data from a machine including a power generating device and a rotating component interconnected with the power generating device for transmitting power from the power generating device. The assembly comprises a sensor assembly for being interconnected with the rotating component for sensing the operational data of the vehicle that includes at least one accelerometer for measuring the rotational speed of the rotating component, a temperature sensor for measuring the temperature of the rotating component, a pressure sensor for measuring the fluid pressure adjacent to the joint, a strain gauge for being interconnected with the rotating component for detecting the strain on the rotating component. The assembly further comprises an energy harvesting assembly for harvesting energy from the rotating component to provide electric power to the sensor assembly. | 07-03-2014 |
20140188354 | Method Of Using Feedforward Compensation Based On Pressure Feedback For Controlling Swash Plate Angle In A Hydrostatic Power Unit Of A Continuously Variable Transmission - A swash plate angle for a hydrostatic power unit of a continuously variable hydromechanical transmission is determined using a feedforward compensation term, to reduce reliance on closed loop control. The feedforward term is based on knowledge of the hydrostatic power unit determined as a function of knowledge of certain parameters, including, but not limited to, hydrostatic power unit pressure, swash plate angle, desired hydrostatic power unit ratio, and pump speed. | 07-03-2014 |
20140249726 | VEHICLE START-UP CONTROL MECHANISM - An object is to provide a vehicle start-up control, mechanism capable of preventing the occurrence of clutch judder with no need of paying excessive attention thereto for a driver. For this purpose, the present invention is provided with a clutch judder detection device ( | 09-04-2014 |
20140277973 | VEHICLE IMMOBILIZER METHOD AND SYSTEM - A system and method of immobilizing a vehicle include receiving a driver presence signal and a transmission state signal and commanding a transmission tie-up in response to the driver presence signal and the transmission state signal. In one embodiment, controlling a transmission element to tie-up a transmission includes braking approximately simultaneously a combination of transmission elements to inhibit rotation of a transmission output and maintaining transmission line pressure to maintain the transmission tie-up when an engine is off. | 09-18-2014 |
20140297138 | ELECTRIC OIL PUMP CONTROL SYSTEM AND CONTROL METHOD FOR AUTOMATIC TRANSMISSION - A control method of an electric oil pump for an automatic transmission that minimizes power loss by normally controlling driving of the electric oil pump when a start intention of a driver is detected after a power source is turned on is provided. The method includes driving an electric oil pump at ‘A’ RPM which is a maximum velocity when the power source is turned on. The driving of the electric oil pump is stopped when a set time t determined by the temperature of the automatic transmission oil has elapsed. The electric oil pump is driven at ‘A’ RPM for the time t, and thereafter, the electric oil pump is driven at ‘B’ RPM when a selection of a driving shift stage is detected. | 10-02-2014 |
20140297139 | IMPROVEMENTS IN VEHICLE TRANSMISSIONS HAVING A PARK FUNCTION - In response to driver selection of PARK, a vehicle transmission is commanded to momentarily select and hold NEUTRAL before PARK, whilst a vehicle wheel brake is applied. Such an arrangement avoids trapping torque in the driveline, and thus can obviate pawl ‘thump’ when PARK is next disengaged. | 10-02-2014 |
20140309895 | METHOD AND APPARATUS FOR CLUTCH PRESSURE CONTROL - A method, apparatus and system for controlling transmission clutch and/or variator system pressures is provided. A transmission control unit and a pressure control device including an electro-hydraulic valve and a pressure switch cooperate to provide self-calibrating clutch and/or variator pressure control systems. | 10-16-2014 |
20140309896 | Method for Processing an Actuation of an Operating Element in a Motor Vehicle - A method is provided for processing an actuation of an operating element in a motor vehicle, particularly of an operating lever, wherein the operating element can be actuated at least by the driver of the motor vehicle. A plurality of sensors are arranged on the operating element, which sensors are at least partially activated when the operating element is actuated. The time sequence of the activation of the sensors is detected when the operating element is actuated, and, based on the time sequence, it is determined whether an undesired actuation is occurring, undesired actuations including unintended actuations and/or actuations by a front-seat passenger. In the event of an undesired actuation, the implementation of one or more actions coupled to the actuation of the operating element in the vehicle is blocked. | 10-16-2014 |
20140324304 | AUTOMATIC TRANSMISSION AND SELECT OPERATION DETERMINATION METHOD FOR AUTOMATIC TRANSMISSION - A transmission controller determines that a select operation has been performed from a reverse range to a drive range if a time during which a range other than the drive range has been selected is longer than a predetermined time threshold value and an input rotation speed of a transmission is lower than a predetermined rotation speed threshold value and determines that the select operation has been performed from a parking range or a neutral range to the drive range if the time during which the range other than the drive range has been selected is shorter than the time threshold value or the input rotation speed is higher than the rotation speed threshold value when the select operation has been performed from the range other than the drive range to the drive range during vehicle stop. | 10-30-2014 |
20140336885 | METHOD AND SYSTEM FOR CONTROLLING ANTI-JERK OF VEHICLE - A method and system for controlling anti-jerk in order to reduce vibration of a vehicle is provided. More specifically, a rotation speed (ω | 11-13-2014 |
20140336886 | SYSTEM AND METHOD FOR CONTROLLING A TRANSMISSION - A system for operating a vehicle equipped with an automatic transmission and a vehicle road speed limiter (RSL) which is programmable to limit the maximum vehicle speed for a given transmission gear includes at least on controller. The at least one controller is operable, when the speed limiter (RSL) is active, to determine if the vehicle is operating in a shuttle shifting range based on the current status of preselected operating parameters. When the vehicle is operating in a shuttle shifting range, the at least one controller is operable to control transmission operation to prevent shifting under conditions where shifting would otherwise normally occur. | 11-13-2014 |
20140350805 | METHOD OF CONTROLLING A TRANSMISSION OF A VEHICLE - A method of controlling a transmission includes detecting an occurrence of a downshift in the transmission from a first gear ratio to a second gear ratio. A determination is made whether the vehicle is operating within a freeway speed range, and whether an accelerator pedal is depressed at least a minimum percentage of a fully depressed position. When the downshift from the high gear ratio to the low gear ratio is detected, the vehicle is operating within the freeway speed range, and the accelerator pedal is depressed at least the minimum percentage of the fully depressed position, a countdown timer is started to count down from a pre-defined time to zero. An upshift of the transmission from the second gear ratio to the first gear ratio is restricted while the countdown timer defines a time that is greater than zero. | 11-27-2014 |
20140350806 | VEHICLE CONTROL DEVICE - In order to enable a transmission to reliably perform a switching to a parking range thereof, a vehicle control device includes a shift-by-wire device which switches a shift range of a transmission mounted on a vehicle in accordance with a request by an electric signal, an acceptance unit which accepts a request for switching to a parking range of the transmission, a detection unit which detects that switching to the parking range of the transmission has been settled, and a braking device which generates a braking force when the acceptance unit accepts a request for switching to the parking range of the transmission, from the time of acceptance of the request for switching until the detection unit detects settlement of the switching to the parking range. | 11-27-2014 |
20140358388 | INTERACTIVE TRANSMISSION SHIFT TECHNIQUES - A method for interactive transmission garage shifts includes receiving a request for a transmission garage shift; controlling the transmission to bring the vehicle to a stop state based on determining that the vehicle is rolling backwards on a grade above a predetermined grade threshold and at a speed below a predetermined speed threshold; controlling an electric park brake (EPB) to hold the vehicle at the stop state; controlling the transmission to engage a dog clutch so as to place the transmission in a forward drive gear; and controlling the EPB to i) deactivate if the dog clutch is determined to be engaged, or ii) maintain activation to maintain the vehicle at the stop state if the dog clutch is determined to be disengaged. | 12-04-2014 |
20140365091 | OIL PUMP SYSTEM OF HYBRID VEHICLE AND METHOD FOR CONTROLLING THE SAME - An oil pump system and method of a hybrid vehicle stably supplies an operating hydraulic pressure to an automatic transmission using only an electric oil pump. The oil pump system of the hybrid vehicle, which supplies an operating hydraulic pressure to an automatic transmission of the hybrid vehicle, includes: an automatic transmission control unit controlling operation of the automatic transmission; an electric oil pump pumping oil to generate an operating hydraulic pressure which is to be supplied to the automatic transmission; and an oil pump control unit receiving information on a state of the automatic transmission from the automatic transmission control unit and controlling operation of the electric oil pump. The operating hydraulic pressure supplied to the automatic transmission may be generated solely through the electric oil pump which is electrically operated. | 12-11-2014 |
20140371998 | ADAPTIVE CONTROL OF A FLOW CONTROL SOLENOID - A vehicle includes an engine, a transmission, and a controller which executes a method. The transmission includes a clutch having an actuator which applies the clutch using position-based control logic. The transmission also includes a fluid pump and a variable-force or other solenoid valve positioned downstream of the pump and upstream of the clutch. The valve outputs a flow rate (Q) for a corresponding solenoid control current (I). The controller adapts a calibrated Q vs. I characteristic table of the valve for different transmission temperatures by applying closed-loop position control signals to the actuator at the different transmission temperatures and recording a null point(s) describing the corresponding solenoid control current (I) at a zero flow rate condition. The controller calculates an offset value for solenoid control current (I) using the recorded null point(s), applies the offset value to the characteristic table, and controls the clutch using the adapted characteristic table. | 12-18-2014 |
20140371999 | PRIMING A START-STOP VEHICLE TRANSMISSION PUMP - A method of controlling a start-stop vehicle transmission pump, includes: assessing how long an engine has been turned off; and when the engine has been turned off for longer than a predetermined threshold and the vehicle is on, priming the transmission pump. | 12-18-2014 |
20150012191 | AUTOMATIC TRANSMISSION - An automatic transmission capable of causing first and second clutches and a connection/disconnection device to properly operate during stoppage of a vehicle, thereby enabling preventing vibration and improving marketability as well as obtaining excellent vehicle startability. When a shift position is switched to a forward travel position, first and second connection operations are executed for connecting transmission of a motive power of a prime mover, from first and second gear mechanisms to drive wheels, respectively, while changing the speed thereof. If the shift position is switched to the forward travel position and no request for a standing start of the vehicle is determined to be made by a driver, engagement of first and second gear clutches for connecting/disconnecting between the prime mover and the gear mechanisms is permitted when both the first and second connection operations have been completed. | 01-08-2015 |
20150032341 | PARTIAL PREFILL OF CLUTCH FOR COAST DOWNSHIFT CONDITIONS IN A VEHICLE - A vehicle transmission includes a plurality of oncoming clutches that are hydraulically-actuated. A controller is operatively connected to the plurality of oncoming clutches. An algorithm stored on and executable by the controller causes the controller to determine if at least one predefined coast condition is met and identify the plurality of oncoming clutches configured to be engageable during a downshift event from an initial gear ratio to respective other gear ratios. The initial gear ratio is greater than each of the respective other gear ratios. The algorithm causes the controller to generate a first pressure command to at least partially pressurize a first one of the oncoming clutches to a first staging pressure (P | 01-29-2015 |
20150032342 | ASYNCHRONOUS-TO-SYNCHRONOUS CLUTCH TORQUE EXCHANGE IN A HYBRID ELECTRIC VEHICLE - A vehicle includes torque sources, a transmission, and a controller programmed to execute a method. In executing the associated method, the controller determines whether continuous output torque is required through a torque exchange. When continuous output torque is required, the controller synchronizes and fills the oncoming clutch, estimates capacity of the oncoming clutch, and expands a short-term torque capacity of the oncoming clutch during the torque exchange, doing so in response to a control objective having a threshold priority. Onset of the torque exchange delays until the short-term torque capacity is sufficient for receiving all torque load from the offgoing clutch without affecting output torque. The controller asynchronously controls the offgoing clutch and synchronously controls the oncoming clutch through the torque exchange, and loads the synchronous oncoming clutch via an expanding set of long-control torque capacity limits as a function of a simultaneously exhausting of the offgoing clutch load. | 01-29-2015 |
20150039191 | DECELERATION CONTROL SYSTEM FOR A VEHICLE - A system for decelerating a hybrid vehicle, the system includes a continuously variable transmission (CVT), a brake pedal, an accelerator pedal, a sensor for detecting a vehicle deceleration, a memory for storing a target deceleration corresponding to a coasting deceleration of the vehicle, and a processor. When the brake pedal and the accelerator pedal are released, the vehicle coasts. If the vehicle deceleration does not match the target deceleration, the processor adjusts the torque output by the CVT so that the vehicle deceleration substantially matches the target deceleration. | 02-05-2015 |
20150046047 | TRANSMISSION WITH POWER DOWNSHIFT ANTICIPATION LOGIC - A vehicle includes an internal combustion engine, an engine control module (ECM) programmed to estimate engine torque as a function of throttle request, and a transmission assembly. The transmission assembly includes a plurality of gear sets and clutches, including an offgoing clutch and an oncoming clutch for a power downshift, and a transmission control module (TCM). The TCM includes a processor and memory on which is recorded a shift line for the downshift, and instructions for executing the downshift. The TCM communicates an estimated throttle level at the shift line to the ECM, receives an estimated engine torque for the estimated throttle level at the shift line from the ECM, and decreases offgoing pressure to the offgoing clutch to a threshold pressure level prior to executing the downshift. The TCM then decreases the offgoing clutch pressure to a calibrated pressure at the shift line to execute the downshift. | 02-12-2015 |
20150046048 | METHOD FOR DETERMINATION OF AT LEAST A DRAG TORQUE EFFECTIVE ON THE INPUT SIDE OF AN AUTOMATIC MOTOR VEHICLE TRANSMISSION - A method of determining at least one drag torque acting on the input side of an automatic transmission, such that prior to the determination a separator clutch located between the transmission and an engine is disengaged. To be able to carry out the determination regardless of the type of transmission concerned, also prior to the determination, the transmission is shifted to neutral and subsequently the drag torque is calculated when the engine is deactivated. For this, a first gradient of a transmission input rotational speed is determined, before an engine rotational speed of the engine falls below the transmission input rotational speed, and a second gradient of the transmission input rotational speed is determined, after the engine rotational speed falls below the transmission input rotational speed. The method is stored as a computer program stored on data carrier of a drive-train control unit of a motor vehicle. | 02-12-2015 |
20150073669 | DEVICE AND METHOD FOR IMPROVEMENT IN SAFETY OF DPF REGENERATION - A method for safety improvement when a motor vehicle ( | 03-12-2015 |
20150073670 | Control System for Four-wheel Drive Vehicle - A deceleration indication value is set so as to prevent a collision between the vehicle and an obstacle on the basis of front side information or to prevent traffic lane deviation, and automatic braking is performed. When automatic braking is performed, a transfer clutch is coupled, a deceleration generated by synchronization of a main drive shaft and a propeller shaft is calculated, the deceleration indication value G is corrected based on the deceleration and a brake liquid pressure corresponding to a corrected deceleration indication value is applied to a brake drive unit. | 03-12-2015 |
20150081182 | HILL ROLLBACK SPEED CONTROL - A hill rollback control system and method for controlling a rollback speed of a motor vehicle with wheel brakes. Upon ascertaining that the vehicle is rolling back, the system and method determine, based on a grade angle of the terrain that the vehicle is traveling on and a temperature of a transmission, a target rollback speed for the vehicle. The target rollback speed is lower when the grade of the terrain is above a threshold value. Also, the target rollback speed is lower when the temperature of the transmission is above a threshold value. The actual rollback speed of the vehicle is set and maintained at the target rollback speed by applying the vehicle's wheel brakes. | 03-19-2015 |
20150081183 | Method and device for monitoring a drive of a motor vehicle - A method for the safe operation of a drive of a motor vehicle, the drive being controlled by at least one control unit, including acceleration monitoring in which the allowability of an operating state of the drive results as a function of a comparison of an ascertained actual acceleration with an allowable acceleration, a fault response being initiated as a function of whether a braking request is present, if the comparison shows that an inadvertent acceleration is present. | 03-19-2015 |
20150088389 | TRANSMISSION CONTROL SYSTEM - A transmission control system is provided for used in a bicycle having a crank, a front sprocket that is rotatable independent of the crank, a rear wheel, a rear sprocket that is rotatable independent of the rear wheel, a chain that engages with the front sprocket and the rear sprocket, and at least one external transmission mechanism. The transmission control system is basically provided with a driving force output device, a detection device and at least one controller. The detection device is one of a rotational state detection device, a manual drive force detecting device and a speed detection device. The at least one controller is programmed to control the driving force output device to drive the chain and to control a gear shifting action of the at least one external transmission mechanism to shift gears, based on a comparison of the detection results by the detection device and a prescribed state or a prescribed value. | 03-26-2015 |
20150100211 | ENERGY-BASED SHIFT CONTROL OF A BINARY CLUTCH ASSEMBLY - A vehicle includes an engine and a transmission assembly having a stationary member, gear sets, an input member connected to one of the plurality of gear sets, a binary clutch assembly, and a transmission control module (TCM). The binary clutch assembly includes a freewheeling element which holds torque only in a first rotational direction and a binary device that, when engaged, prevents rotation of the binary clutch assembly in a second rotational direction, and that allows the binary clutch assembly to freewheel in the second rotational direction when released. The TCM executes a method via instructions to determine a total amount of clutch energy of the binary clutch assembly, compare the determined total amount of clutch energy to a calibrated clutch energy threshold, and delay an execution of the requested shift when the determined total amount of clutch energy exceeds the calibrated clutch energy threshold. | 04-09-2015 |
20150134212 | CONTROL DEVICE, VEHICLE INCLUDING CONTROL DEVICE, AND CONTROL PROGRAM - A gearbox of a twin clutch includes dog portions of a movable gear and a fixed gear which may be disengaged and reengaged with each other. A control device for a vehicle including the twin clutch includes a shift actuator control unit that, when shifting a gear to another speed outputs a target position signal so as to shift a rotation position of a shift actuator to a gear shift position at which a gear shift operation is performed by a transmission, and a clutch control unit that outputs torque signals so as to connect a clutch that transmits power to, among movable gears and fixed gears, a movable gear or a fixed gear including a dog portion to be disengaged. The shift actuator control unit outputs the target position signal so as to return the rotation position of the shift actuator to a neutral position. | 05-14-2015 |
20150142280 | CONTROL SYSTEM FOR FOUR-WHEEL DRIVE VEHICLE - A disconnect mechanism is configured to disconnect a predetermined rotating element from an engine and an auxiliary drive wheels while the vehicle is traveling in a two-wheel drive mode. The predetermined rotating element is configured to transmit power to the auxiliary drive wheels while the vehicle is traveling in a four-wheel drive mode. An electronic control unit is configured to: execute shift control when a shift condition of an automatic transmission is satisfied; selectively engage or release the disconnect mechanism based on a traveling state of the vehicle and a driver's predetermined operation; and control at least one of the automatic transmission or the disconnect mechanism such that a shift period based on the shift condition of the automatic transmission and an engagement-release period of the disconnect mechanism at least partially overlap with each other. | 05-21-2015 |
20150291174 | CONTROL APPARATUS FOR VEHICLE - In a control apparatus for a vehicle that changes over a range of an automatic transmission by operating an electric shift actuator and that starts up an engine by operating a starter motor, for example, when an occupant of a vehicle that has carried out idling stop operates a shift lever, the operation of the shift actuator corresponding thereto is started, and the operation of the starter motor is started after the lapse of a predetermined period therefrom. Thus, while the starting responsiveness of the vehicle is enhanced, a fall in battery voltage is restrained from adversely affecting the operation of the shift actuator, and the occurrence of a shock and a decrease in driveability are suppressed as well. | 10-15-2015 |
20150321675 | CONTROL METHOD AND SYSTEM FOR CREEP TORQUE OF VEHICLE - A method of controlling creep torque of a vehicle being provided with an Auto Hold function, includes: a brake detection step for detecting a brake signal of the vehicle; a braking step for activating a brake force and reducing creep torque according to the brake signal; a start detection step for detecting a start signal of the vehicle after the vehicle is stopped; and a starting step for deactivating the brake force and increasing the creep torque according to the start signal. | 11-12-2015 |
20150344024 | CONTROL SYSTEM FOR VEHICLE - A control system for a vehicle capable of changing a deceleration by changing a shift range, includes: a PM-ECU for controlling a powertrain of the vehicle; and a start switch operated by a driver to start and stop the PM-ECU. When the start switch is operated during travel of the vehicle, the PM-ECU stops control of the powertrain. When the PM-ECU stops control of the powertrain and thereafter the start switch is operated again during travel of the vehicle, the PM-ECU controls the shift range in accordance with an elapsed time since the PM-ECU stopped control of the powertrain. | 12-03-2015 |
20150345624 | METHOD FOR CONTROLLING A TRANSMISSION - A method for controlling a transmission to reduce or suppress vibrations of transmission elements and/or rattling sounds, in particular in dual-clutch transmissions having a first transmission line with a first clutch and having a second transmission line with a second clutch. | 12-03-2015 |
20150353098 | CONTROL SYSTEM AND METHOD - The present invention relates to a control system for a vehicle powertrain ( | 12-10-2015 |
20150362026 | STARTING CLUTCH CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - A starting clutch control device for an automatic transmission has a starting clutch controller. The starting control device controls a transmission torque capacity of a starting clutch interposed in a transmission path in which rotation of the power source is transmitted to wheels while shifting is underway by the automatic transmission. The starting clutch controller controls the transmission torque capacity of the starting clutch such that a rotation trajectory of the power source develops as desired in a low rotation speed range in which the transmission torque capacity control of the starting clutch is necessary. The starting clutch controller causes the transmission torque capacity of the starting clutch to change, when a shift of the automatic transmission occurs during the transmission torque capacity control by the starting clutch controller, in a direction in which the change in the rotation trajectory will occur corresponding to the shift. | 12-17-2015 |
20150369364 | TRANSMISSION SYSTEM WITH CLUTCH BITE POINT LEARNING LOGIC - A method for learning the bite point of a position-controlled clutch in a vehicle having an engine and a transmission includes commanding an engagement of a clutch fork via a controller when the transmission is in park and the engine is idling. The method also includes controlling an apply position of the clutch via the controller, calculating a clutch torque capacity of the clutch, and measuring the apply position via a position sensor. The apply position is recorded as the clutch bite point when the calculated clutch torque capacity equals a calibrated clutch torque capacity. The transmission is then controlled using the recorded clutch bite point. A system includes the transmission, input clutches, and a controller configured to execute the method. A vehicle includes an engine, the transmission, the position-controlled input clutch, and the controller, as well as a clutch position sensor. | 12-24-2015 |
20160009292 | VEHICLE CONTROL DEVICE AND VEHICLE CONTROL METHOD | 01-14-2016 |
20160047471 | METHODOLOGY FOR CONTROLLING A HYDRAULIC CONTROL SYSTEM OF A CONTINUOUSLY VARIABLE TRANSMISSION - A hydraulic control system for a CVT may include a pressure regulator subsystem, a ratio control subsystem, a torque converter control (TCC) subsystem, a clutch control subsystem, and is enabled for automatic engine start/stop (ESS) functionality. A system and method are provided for performing an engine auto-stop in a vehicle having a CVT transmission and using an accumulator to fill the pulleys and clutches of the CVT, at least in part, during engine restart. | 02-18-2016 |
20160053890 | SYSTEM FOR DETECTING PARK STATE OF A TRANSMISSION - A transmission diagnostic system includes a pivotable member and an actuator. The actuator has a notch with a first side, a second side, and an opening between the two sides. The width of the opening is greater than a width of the pivotable member. The pivotable member is retained within the notch, and the actuator is configured to selectively pivot the pivotable member between an engaged position, corresponding to a PARK gear, and a disengaged position, corresponding to a gear other than PARK. The transmission diagnostic system also includes a biasing spring configured to exert a biasing torque on the pivotable member to bias the pivotable member toward the first side of the notch. The transmission diagnostic system further includes a controller configured to generate at least one diagnostic signal in response to the pivotable member not being in contact with the first side of the notch. | 02-25-2016 |
20160101781 | Method for Operating an Automatic Transmission - A method for operating an automatic transmission is provided. The method includes commanding a positive shifting element to actuate to a disengaged configuration or an engaged configuration and opening at least one non-positive shifting element if the positive shifting element does not properly actuate. Opening the at least one non-positive shifting element may terminate power flow from the automatic transmission in order to protect the automatic transmission. | 04-14-2016 |
20160121896 | VEHICLE CONTROL SYSTEM AND VEHICLE CONTROL METHOD - A vehicle control system and method is applied to a vehicle including: a continuously variable transmission for changing a speed ratio continuously that is disposed between an input shaft and an output shaft; a geared transmission that is disposed parallel to the continuously variable transmission, and that is adapted to establish a speed ratio that cannot be established by the continuously variable transmission; and a friction clutch that is brought into engagement to switch a torque transmission route from a route including the geared transmission to a route including the continuously variable transmission. The vehicle control system is configured to start a speed change operation of the continuously variable transmission before a commencement of clutch-to-clutch shifting between the friction clutches when switching the torque transmission route from the route including the geared transmission to the route including the continuously variable transmission. | 05-05-2016 |
20160138713 | SHIFT CONTROL METHOD FOR VEHICLE WITH DCT - A shift control method for a vehicle with a Dual Clutch Transmission (DCT) may include determining whether power-on up-shifting has been initiated, performing torque handover control by controlling release-side and engage-side clutches by repeatedly calculating control torques of the release-side clutch and the engage-side clutch over time, when the power-on up-shifting is started and a torque handover period is entered, determining whether tip-out is generated during the performing of torque handover control, obtaining a remaining updating time by recalculating a remaining time until the end of the torque handover period in accordance with a decrease in engine torque, when it is determined that tip-out has been generated, and controlling the release-side and the engage-side clutches on the basis of the control torques for the release-side and the engage-side clutches that are made different in accordance with the calculated remaining updating time during a remaining torque handover period. | 05-19-2016 |
20160159355 | High Speed Downshift Management - In order to reduce drivetrain component wear and tear, a machine monitors for an impending downshift and automatically slows the machine to a speed that keeps engine rpm below a target engine rpm before the downshift is completed. A controller in the machine determines the current speed of the machine and then slows the machine to a new speed associated with the target rpm in the new gear. The controller may simply apply the brakes to slow the machine to the new speed independently of the process of changing gears or may actively delay the gear change until the new speed is achieved. | 06-09-2016 |
20160167654 | TRANSMISSION SYSTEM FOR VEHICLE | 06-16-2016 |
20160167658 | METHOD FOR OPERATING A MOTOR VEHICLE WITH A DUAL CLUTCH TRANSMISSION AND CONTROL UNIT FOR CARRYING OUT THE METHOD | 06-16-2016 |
20190143973 | MULTIPLE RANGE INDEPENDENTLY DISCONNECTING SMART AXLE | 05-16-2019 |