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| Number | Title | Issue Date |
| 7909733 | Clutch end-of-fill detection strategy A system and method for controlling a hydraulic transmission uses a solenoid valve having a pressure sensor linked to the valve body operable to sense a hydraulic fluid pressure within a cavity of the valve body and to transmit an electrical signal based on the sens... | 03/22/2011 |
| 7892144 | Method for the operation of a drivetrain A method for operating a motor vehicle drivetrain with at least an automatic transmission and a drive motor. The automatic transmission includes at least five shifting elements to transmit torque and/or power. In each forward and reverse gear a maximum of two shifti... | 02/22/2011 |
| 7775935 | Overrun prevention system for an automatic transmission A system and method for overrun prevention is disclosed. Overrun of a one-way clutch may be prevented by determining a current torque value. When a current torque value approaches a negative value, a shift to a gear without a one-way clutch may be performed. Driving... | 08/17/2010 |
| 7686738 | Powertrain control apparatus and method Hydraulic pressure supplied to a first brake and a second brake in a transmission is controlled during an upshift such that the second brake releases from an applied state, and the first brake applies from a released state. The hydraulic pressure supplied to the fir... | 03/30/2010 |
| 7651440 | Control of engine torque reduction at upshift initiation An improved control for an automatically shiftable transmission upshift, wherein the engine output torque and on-coming clutch pressure are coordinated during the shift based on an inverse dynamic model of the transmission to achieve a desired output torque trajecto... | 01/26/2010 |
| 7527578 | Electronic adaptive swap-shift control for an automatic transmission for automotive vehicles A control system and control method for a swap-shift transmission having auxiliary and main gearsets wherein precise synchronization control of ratio changes of each gearset at the start and at the end of a swap-upshift progression is achieved using an adaptive cont... | 05/05/2009 |
| 7416515 | Engine torque control device An engine torque control device is configured to lessen shift shock while shortening the shift time during downshifting with an automatic transmission. When a downshift requirement is generated, a disengagement control of a higher gear clutch (current gear ratio) is... | 08/26/2008 |
| 7390285 | Hydraulic control system of automatic transmission for vehicle A hydraulic control system of an automatic transmission that precisely control is operating hydraulic pressure supplied to a frictional element during shifting and can eliminate oil leak under a maximum operating hydraulic pressure. The hydraulic control system cont... | 06/24/2008 |
| 7384375 | Apparatus for controlling an automatic transmission When a charge control is applied to a clutch during a shifting operation of an automatic transmission, a charge counter of this clutch is set to a predetermined value. When a drain control is applied to the clutch, the charge counter is counted down. In response to ... | 06/10/2008 |
| 7373233 | System and method for controlling the coupling between the driveshaft and the primary gear shaft in a motor vehicle with a servo-controlled gearbox What is described is a control system for controlling the coupling between a driveshaft of a motor vehicle propulsion system and a primary input shaft of a gearbox by means of a servo-assisted friction clutch. A control unit receives at its input signals indi... | 05/13/2008 |
| 7357754 | Mechanism and method of controlling an automatic shifting power transmission to effect a first gear launch The present invention provides a mechanism and method of launching a vehicle using a conventional automatic shifting power transmission. By slipping a first gear reaction clutch during a launch, an efficient hydrodynamic fluid drive with a low stall speed may be use... | 04/15/2008 |
| 7351183 | Ratio shift control for a multiple ratio automatic transmission A gear ratio shift control and control method controls gear ratio upshifts in a multiple-ratio transmission for an automotive vehicle. Pressure actuated friction elements establish torque flow paths in transmission gearing as they are selectively engaged and release... | 04/01/2008 |
| 7349785 | Method of controlling clutch slip during gear shifts of an automatic transmission A method is provided for controlling engagement of a clutch which carries torque before, during and after a shifting event in a transmission which is connected to a throttle-controlled engine. The method includes providing a feed forward input command which increase... | 03/25/2008 |
| 7344477 | Up shift control with overrunning clutch An automatic transmission for a vehicle includes a multi-plate clutch having an applied state and a released state and an overrunning clutch having an engaged state and an overrunning state. In addition, the transmission includes a controller that effectuates a gear... | 03/18/2008 |
| 7337668 | Accelerometer in closed loop with error detection An accelerometric measurement device with a return loop including accelerometer, a corrector generating a signal for correction of the position of the accelerometer, a closed return loop to apply this correction signal to the accelerometer, a detector to detect an e... | 03/04/2008 |
| 7335132 | Method for reducing a tip-in shock of an automatic transmission In the case a tip-in occurs during a downshift control in a coasting state of a vehicle, when an engine torque reduction control condition is satisfied, an engine torque is limited by limiting a throttle opening. The limited engine torque is gradually recovered to a... | 02/26/2008 |
| 7331902 | Method for performing high throttle neutral to range shifts According to a preferred embodiment of the present invention, a “special neutral” is commanded to initiate the neutral to range shift. The “special neutral” of the present invention is special in that while the transmission output speed remains unconstrained... | 02/19/2008 |
| 7318512 | Dual clutch transmission with radially nested clutches having a common disk carrier A dual clutch transmission having radially nested clutches includes an outer clutch having a plurality of first outer clutch disks, a plurality of first inner clutch disks, and a first inner support carrier, with the first inner clutch disks operatively mounted to t... | 01/15/2008 |
| 7318789 | Hydraulic control system for automatic transmission An automatic transmission has an electronic control unit and a hydraulic control unit. The electronic control unit outputs an engagement command pressure to a solenoid disposed in a hydraulic control unit to generate a shelf pressure to upshift the automatic transmi... | 01/15/2008 |
| 7306543 | Automatic transmission controller An automatic transmission controller has an electronic control circuit, an electromagnetic valve, and a pressure control valve. The electronic control circuit generates a control current. The electromagnetic valve regulates a command pressure in accordance with the ... | 12/11/2007 |
| 7302330 | Torque converter clutch dynamic control A method of dynamically controlling pressure to a torque converter clutch (TCC) of a torque converter coupled to a transmission is provided. The method includes: monitoring throttle position; monitoring engine speed; controlling pressure to the torque converter clut... | 11/27/2007 |
| 7294091 | Transmission A transmission comprises a first transmission mechanism and a second transmission mechanism. When a clutch is in an engaged state, the first transmission mechanism transmits a driving force from the engine to the axle shaft. When a clutch is in a disengaged state, t... | 11/13/2007 |
| 7291092 | Shift control apparatus and method for automatic transmission In shift control apparatus and method for an automatic transmission in which an engine speed is inputted, and a shift change in a shift stage of the automatic transmission is performed to make a gear shift, a shift revolution synchronization control in synchronizati... | 11/06/2007 |
| 7282012 | Electronic adaptive swap-shift control for an automatic transmission for automotive vehicles A control system and control method for a swap-shift transmission having auxiliary and main gearsets wherein precise synchronization control of ratio changes of each gearset at the start and at the end of a swap-upshift progression is achieved using an adaptive cont... | 10/16/2007 |
| 7278953 | Transmission shift control method A method is provided for shifting a powershift transmission in a vehicle having an electronic engine control unit and an electronic transmission control unit. The method rapidly reduces off-going clutch pressure to a pressure which is slightly higher than a Predicte... | 10/09/2007 |
| 7270622 | Acceleration mode for a vehicle with a continuous transmission An acceleration mode recommended for a vehicle with a continuously variable transmission, within the scope of which, after the shift takes place, the engine speed progress will continue as a function of the speed with a calibrated rotational speed gradient (H), the ... | 09/18/2007 |
| 7264101 | Start-up clutch and torsional-vibration damper assembly A start-up clutch and torsional-vibration damper assembly including a disk clutch having an outer disk carrier and an inner disk carrier, and a torsional vibration damper having a primary element, a secondary element, and a spring dampening mechanism. The spring dam... | 09/04/2007 |
| 7264572 | Hydraulic control method for an automatic transmission for accelerator tip-in during static shifting and apparatus thereof A duty jumping amount at an actual shift-begin point (SB point) during static shifting is calculated dependent on an automatic transmission fluid temperature and a turbine torque. Therefore, an adjustment of hydraulic pressure supplied to an on-coming clutch at the ... | 09/04/2007 |
| 7247126 | Method and apparatus for shift control of an automatic transmission Whenever a 4 to 3 shift condition is satisfied during a 3 to 4 upshift, 4 to 3 shifting is started before the 3 to 4 shifting is finished. The 4 to 3 shifting is executed according to a predetermined hydraulic control pattern. Therefore, responsiveness in shifting i... | 07/24/2007 |
| 7244215 | Transmission control system and method A vehicle transmission transmits torque from an engine to a drive axle and includes a power shift transmission and a reverser module. A control system and method automatically partially disengages the reverser module during a shift of the power shift transmission wi... | 07/17/2007 |
| 7223201 | Control of power-on downshifts in a multiple-ratio powertrain for a hybrid vehicle A method for controlling engagement and release of friction clutches in a multiple-ratio transmission for a hybrid electric vehicle powertrain uses electric motor torque to augment engine torque as a power-on downshift is commanded. Near the end of a downshift event... | 05/29/2007 |
| 7216025 | Adaptive pressure control method for synchronous downshifts in a multiple-ratio transmission An adaptive pressure control method for synchronous downshifts in an automatic transmission that uses pressure actuated friction elements. The method uses characteristic parameters that determine downshift quality for both power-on downshifts and power-off downshift... | 05/08/2007 |
| 7194348 | High acceleration time shift control apparatus and control method for vehicle A high acceleration time shift control apparatus and method for a vehicle is provided. The high acceleration time shift control apparatus includes a transmission which achieves plural shift speeds whose gear ratios are different from each other; and a high accelerat... | 03/20/2007 |
| 7191006 | Cardiac rhythm management systems and methods for rule-illustrative parameter entry This document describes systems, devices, and methods for programmably adjusting therapy or other operative parameter values of an implantable cardiac rhythm management device using a programmer that includes a display that graphically illustrates one or more relati... | 03/13/2007 |
| 7189185 | Method for operating a drive train in a motor vehicle In a method for operating a drive train for a motor vehicle including a transmission with a hydraulic torque converter having a converter lockup clutch which can be activated by a working pressure acting on a piston under engine overrun conditions when an increased ... | 03/13/2007 |
| 7175561 | Planetary transmissions having two non-continuously interconnected gear members The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting ... | 02/13/2007 |
| 7140993 | Fly-by-wire limp home and multi-plex system An electro-hydraulic control mechanism for use with a multi-speed transmission includes a pair of logic valves, which are manipulated during the ratio interchanges and the ratio establishment by aiding in the distribution of fluid pressure from a plurality of trim v... | 11/28/2006 |
| 7134983 | Shift control method of automatic transmission for vehicles A shift control method and system for an automatic transmission. The control method includes calculating a clutch engaging pressure for each shift speed corresponding to an engine load and calculating an optimal engaging pressure for an operating clutch in each shif... | 11/14/2006 |
| 7131931 | Gearbox control system In a gearbox control system (8) for detecting systematic errors and long-term changes, the behavior of a real gearbox (1) is compared to the behavior of an ideal gearbox (7), which is implemented in the form of a gearbox model in the gearbox con... | 11/07/2006 |
| 7131933 | Vehicle control apparatus having means for changing inertia torque of engine during shifting action or during switching of operating state of lock-up clutch A control apparatus for an automotive vehicle having an automatic transmission and an engine capable of controlling a resistance to its rotary motion. The control apparatus is adapted to change an output torque of the engine temporarily during a shifting action of t... | 11/07/2006 |
