| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 477079000 |
Clutch and transmission controlled
| 70 |
| 477077000 |
Clutch, engine, and transmission controlled
| 41 |
| 477086000 |
Clutch controlled
| 31 |
| 477071000 |
And brake control
| 22 |
| 477083000 |
Clutch and engine controlled
| 22 |
| 477076000 |
Temperature responsive control | 4 |
| 20090036265 | HYDRAULIC OVER/UNDERSHOOT PROTECTION FOR TRANSMISSION CLUTCH CONTROL - A vehicle automatic speed change power transmission control includes a control arrangement with overshoot/undershoot protection logic. The control is used with an electro-hydraulic pressure control module featuring a linear solenoid, and which supplies a hydraulically-actuated clutch configured to effect gear changes. The overshoot/undershoot protection logic is configured to detect when a commanded increase/decrease clutch pressure satisfies a clutch pressure threshold and to then activate the protection logic. Once the protection logic is activated, large command pressures increases/decreases are implemented in a series of stages having variable gains. The first stage has an aggressive gain and achieves 50-80% of the commanded clutch pressure. The second stage has a reduced gain and achieves 90% of the commanded clutch pressure. The third stage has a still further reduced gain and achieves about 100% of the commanded clutch pressure. | 02-05-2009 |
| 20100113216 | Temperature Control of Dual Input Clutch Transmission - A system for controlling temperature of a transmission clutch includes a housing containing the clutch, a fan for circulating air through the housing and over the clutch, and a controller configured to determine an inferred temperature at a reference surface on the clutch and to actuate the fan in response to the inferred temperature. | 05-06-2010 |
| 20100130328 | DRIVE LINE OPERATION METHOD - A method of operating a vehicle drive train, whereby the drive train comprises a drive unit, a transmission, and an all-wheel splitter having an automatically operating clutch, positioned between the transmission and the output. The clutch is operated in a continuous slip mode and in such a way that the all-wheel splitter splits the transmission output torque for variable torque distribution to driven axles. The splitting of the output torque to the driven axles is performed by a control unit, implemented into the all-wheel drive strategy, so that the output torque, less a predetermined nominal torque, is transferred to a first axle, and the nominal torque is transferred to a second axle. When defined operating conditions are met, a limiting of the torque, set by the drive unit, and/or the nominal torque, set by the all-wheel strategy, occurs to avoid a thermal overloading of the clutch of the all-wheel splitter. | 05-27-2010 |
| 20130079194 | Temperature Dependent Minimum Transmission Input Speed - A system and method is employed to regulate a minimum transmission input speed based on automatic fluid temperature. The system includes a temperature sensor for sensing a temperature of the automatic transmission fluid and a controller for setting a minimum engine speed of the engine based on the temperature of the automatic transmission fluid. The size of a transmission pump may be reduced while the pump is still able to supply enough automatic transmission fluid to friction elements and gear ratios to provide lubrication and enable friction element actuators to engage and disengage the friction elements in a timely and effective manner In a preferred form of the invention, when the temperature of the automatic transmission fluid is below 210° F., the minimum engine speed is set to no greater than 900 rpm; and when the temperature of the automatic transmission fluid is above 210° F., the minimum engine speed is set to no less than 1000 rpm. | 03-28-2013 |
| 477090000 |
Engine controlled | 2 |
| 20100160113 | METHOD FOR SHIFTING A GEAR IN A MULTI-STAGE GEARBOX OF A MOTOR VEHICLE AS A FUNCTION OF THE DRIVE INPUT SHAFT ROTATIONAL SPEED - Method for shifting, in particular engaging and/or disengaging, gears in an automatic multi-stage gearbox of a motor vehicle, wherein the gearbox comprises a drive input shaft ( | 06-24-2010 |
| 20130296133 | METHOD AND APPARATUS FOR OPERATING A POWERTRAIN SYSTEM UPON DETECTING A STUCK-CLOSED CLUTCH - A powertrain system includes a multi-mode transmission having a plurality of torque machines. A method for controlling the powertrain system includes identifying all presently applied clutches including commanded applied clutches and the stuck-closed clutch upon detecting one of the torque-transfer clutches is in a stuck-closed condition. A closed-loop control system is employed to control operation of the multi-mode transmission accounting for all the presently applied clutches. | 11-07-2013 |
| Entries |
| Document | Title | Date |
|---|
| 20080220936 | Automatic transmission assembly for a vehicle, and vehicle incorporating same - An automatic transmission assembly having a transmission unit including a plurality of gear pairs, a shift drum, a pair of clutches; and a controller. The controller performs a preliminary upshifting action in advance for angularly moving the shift drum depending on a next gear position in an upshifting direction while rotary drive power is being maintained at a given gear position, and when an upshifting command is output, the controller engages one of the clutches simultaneously with the command. When a downshifting command is output, the controller performs a preliminary downshifting action in advance based on the downshifting command. The partially neutral positions are provided between predetermined angular positions on the shift drum for temporarily reducing the angular speed of the shift drum when the shift drum is being angularly rotated. | 09-11-2008 |
| 20080254938 | VEHICLE CLUTCH ENGAGEMENT CONTROL SYSTEM AND METHOD - A clutch engagement control system for a vehicle transmission. The system comprises an automatic transmission gearset and at least one hydraulic clutch coupled to the gearset. A hydraulic pressure controller is coupled to the clutch. A clutch engagement controller is coupled to the pressure controller, and an altitude sensor is coupled to the clutch engagement controller. The clutch engagement controller is configured to receive from the altitude sensor an altitude signal corresponding to the altitude of the vehicle. The clutch engagement controller adjusts a hydraulic pressure request of the pressure controller in accordance with the altitude signal, such that the clutch engages with at least one of a rate and pressure corresponding to the sensed altitude. A method employs the system. | 10-16-2008 |
| 20090197736 | PROCESS FOR CALIBRATING AN AUTOMATIC TRANSMISSION - A method is provided for calibrating an automatic transmission with a torque converter clutch. In order to avoid that the torque converter clutch still has capacity even if the pressure is commanded to be zero without modifying the behavior of the torque converter clutch behavior of all the production, the torque converter clutch minimum offset transmissions are detected and only on these transmissions the torque converter minimum clamp pressure is decreased by a pressure step and the torque converter clutch coast adapt reference cell is increased. | 08-06-2009 |
| 20090286648 | METHOD FOR CONTROLLING A BRIDGING CLUTCH IN A HYDRODYNAMIC TORQUE TRANSMISSION DEVICE - A method is proposed for controlling a bridging clutch in a hydrodynamic torque transmission device of a vehicle, such that with reference to a predetermined load status of the vehicle the bridging clutch is closed in a predetermined gear (x) of the transmission, and the gear (x, x | 11-19-2009 |
| 20100016119 | CLUTCH SYSTEM - A clutch system for producing and interrupting a force flow between the engine and transmission of a motor vehicle, with a clutch, which is disengaged unless actuated, and one or more valves, which regulate the flow of pressure medium and which are electrically actuated by a control and regulation unit. If there is electrical failure while driving and when a gear is engaged or when the vehicle is stationary, the engine is running and a transmission gear is engaged, unintended clutch engagement is prevented. The valves are designed such that if there is a failure of the voltage supply and consequently also of the actuation of the valves by the electronic control and regulation system, the operating condition of the clutch existing at the time of failure, namely the disengaged or engaged operating condition, remains as it is. | 01-21-2010 |
| 20100190604 | Transmission - A motor vehicle transmission includes a power splitter connected with the vehicle engine and having two outputs. A differential and a clutch are connected with the outputs of the splitter. Separate gearboxes including alternating sequential gear mechanisms are connected with the differential and clutch. The differential and clutch are independently operated under control of an electronic control unit to provide continuous flow of power from the engine to the gearboxes which may be simultaneously operated. | 07-29-2010 |
| 20100210415 | VEHICLE CONTROLLER AND CONTROL METHOD - When initial control ends, an ECU executes a program that includes the steps of: calculating a return control progression degree; calculating a target amount of change in turbine speed; calculating a feedback gain; calculating a target turbine speed; calculating a deviation between the target turbine speed and turbine speed NT; determining a hydraulic pressure command value; outputting the hydraulic pressure command; and when the turbine speed is synchronized with a first gear synchronization speed, outputting the maximum hydraulic pressure command. | 08-19-2010 |
| 20100298091 | Power Transmission - A power transmission in which a driven body and a drive body for driving the driven body are rotated in the same direction and are coupled through a coupling portion, transmission of torque from the drive body is interrupted when the driving load of the driven body exceeds a predetermined level, and the coupling portion is constituted by combining members different from each other of a positive torque transmission member for transmitting torque in the direction of forward rotation and interrupting transmission of torque from the drive body by its own fracture when the driving load of the driven body exceeds the predetermined level and a negative torque transmission member capable of transmitting torque in the direction of reverse rotation. At a contact portion between the positive torque transmission member and the negative torque transmission member, interposed is a surface layer composed of a different kind of material from a material composing the positive and negative torque transmission members. Reliability and durability of the power transmission can be improved by preventing occurrence of melt-adhesion, abrasion or rust at the contact portion between the members constituting the coupling portion. | 11-25-2010 |
| 20100304927 | DUAL GAIN CLUTCH CONTROL SYSTEM - An automatic transmission includes a control system for controlling a clutch of the transmission. The control system includes a first variable flow solenoid and a second variable flow solenoid, each in selective fluid communication with the clutch. The first variable force solenoid provides hydraulic fluid within a first pressure range of 0 and 1,000 kPa. The second variable force solenoid provides hydraulic fluid within a second pressure range of 0 and 2,000 kPa. A transmission controller sends an electrical signal having a current between the range of 0 and 1 amp to one of the first and second variable flow solenoids. The pressure output of each of the first and second variable force solenoids is a function of, within their respective first and second pressure ranges, the amplitude of the current of the electrical signal to provide two distinct power gains to the single clutch. | 12-02-2010 |
| 20110015034 | MULTI-RATIO ROTORCRAFT DRIVE SYSTEM AND A METHOD OF CHANGING GEAR RATIOS THEREOF - A multi-ratio rotorcraft drive system and a method of changing gear ratios thereof are disclosed. According to one embodiment, the multi-ratio rotorcraft drive system comprises a rotor system comprising one or more rotors and one or more engines. Each engine of the one or more engines is coupled to the rotor system through a multi-ratio transmission. The multi-ratio transmission comprises an output shaft coupled to the rotor system, an input shaft coupled to a respective engine of the one or more engines, a high speed clutch integrated into a high speed gear train, and a low speed clutch integrated into a low speed gear train. The high speed clutch and the low speed clutch are freewheeling clutches without a friction plate and are capable of disconnecting the output shaft and the input shaft in an overrunning condition when the output shaft spins faster than the input shaft. The multi-ratio transmission shifts between the high speed gear train and the low speed gear train by engaging or disengaging the high speed clutch and modulating speed of the coupled engine. | 01-20-2011 |
| 20110245035 | DUAL-PISTON NORMALLY-ENGAGED CLUTCH - A normally-engaged clutch is provided having a friction-element with a first side and an opposing second side, a first plate configured for pressing against the friction-element on the first side, and a second plate configured for pressing against the friction-element on the second side. The clutch also includes a biasing device configured to apply a first force to the second plate for pressing the second plate against the friction-element to engage the clutch. Additionally, the clutch includes an apply piston for applying a second force to the first plate, and a release piston for applying a third force to the second plate. The clutch is disengaged when the second plate is pushed away from the friction-element by the third force in the absence of the second force, and is engaged when the first plate is pressed against the friction-element by the second force. | 10-06-2011 |
| 20120115679 | METHOD FOR CONTROLLING A TRANSMISSION COUPLED TO AN ENGINE THAT MAY BE AUTOMATICALLY STOPPED - Methods and systems for controlling a transmission coupled to an engine during an engine start are presented. In one example, a method adjusts a transmission tie-up force in response to an indication of transmission slip. The method may improve vehicle launch for stop/start vehicles. | 05-10-2012 |
| 20140011633 | CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - There is provided a control device for an automatic transmission configured to automatically shift a transmission of a driving force of a motor in response to a driving state. The automatic transmission includes a synchromesh mechanism configured to couple gear pairs and a rotary shaft to transmit the driving force of the motor to the gear pairs and a switching apparatus configured to switch a coupling state of the gear pairs and the rotary shaft. A preload control unit is configured to operate the switching apparatus to apply a preload to the synchromesh mechanism when a shift transmission request is detected. A shift control unit is configured to operate the switching apparatus to apply a shift load greater than the preload to the synchromesh mechanism after the preload is applied to the synchromesh mechanism. | 01-09-2014 |
| 20140045651 | Flywheel Assembly for a Powertrain - A powertrain for a machine may include a flywheel and a drivetrain having multiple configurations to permit the flywheel to be mechanically connected both upstream and downstream of a transmission. A bypass clutch may be used to selectively couple the flywheel directly to the engine, while a flywheel clutch may be used to selectively couple the flywheel directly to a lower powertrain. In both upsteam and downstream modes of operation, the transmission is bypassed to increase flywheel energy storage and use, as well as expanding the functionality of the flywheel. | 02-13-2014 |
| 20140329641 | DRIVE TRAIN HAVING A SPUR GEARING AND A CENTRIFUGAL PENDULUM - A drive train including an internal combustion engine with a crankshaft, and having a spur gear arrangement with at least one transmission input shaft that is coupled to the crankshaft by a friction clutch. A clutch plate within a housing of the friction clutch is connected in a rotationally locked manner to the at least one transmission input shaft and includes a centrifugal force pendulum. To accommodate the centrifugal force pendulum in the drive train in a space saving manner, the centrifugal force pendulum is situated on the at least one transmission input shaft at an axial distance from the clutch plate. | 11-06-2014 |
| 20150024904 | Adjusting Clutch Slip Based on Sensed Parameter of Transmission Shaft to Control Vehicle NVH - A vehicle powertrain includes a transmission and a clutch. The slip of the clutch is adjusted to a predefined target where a sensed parameter of a shaft of the transmission corresponds to a specified noise, vibration, and harshness (NVH) level in the powertrain. The sensed parameter of the transmission shaft may be one of acceleration, speed, and torque of the transmission shaft. The transmission shaft may be one of the input shaft and output shaft of the transmission. | 01-22-2015 |
| 20150111695 | CLUTCH MECHANISM, METHOD FOR THE OPERATION OF THE CLUTCH MECHANISM, AS WELL AS DRIVE TRAIN OF A MOTOR VEHICLE - A clutch mechanism which is arranged in a drive train between an internal combustion engine and a manual shift transmission of a motor vehicle. An input shaft is connected rotationally secured to the internal combustion engine and an output shaft is connected rotationally secured to the manual shift transmission. The input shaft is also connected rotationally secured to an input plate support and the output shaft is also connected rotationally secured to an output plate support. The input plate support supports input plates and the output plate support supports output plates. The input plates and the output plates can be charged and cooled with oil. | 04-23-2015 |
| 20160176405 | TRANSMISSION | 06-23-2016 |
| 20190143976 | Method for Operating a Drive Train of a Motor Vehicle, and Drive Train Module of a Motor Vehicle of This Type | 05-16-2019 |
