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| Number | Title | Issue Date |
| 7559875 | Method for controlling the shift sequence of a multispeed automatic transmission in a motor vehicle A method for controlling the shift sequence of a multispeed automatic gearbox in which, to reach a target gear called for, multiple shifts through one gear-step can be carried out. A target gear from a currently engaged gear is proposed and, which is several gear-st... | 07/14/2009 |
| 7381151 | Upshift control system of automatic transmission and method thereof A power-on 2-3 upshift control method for an automatic transmission comprises: determining whether a power-on 2-3 upshift condition exists; extracting an initial hydraulic pressure control duty and hydraulic pressure control duty depending on an input torque from a ... | 06/03/2008 |
| 7364525 | Hydraulic control apparatus of automatic transmission A hydraulic control apparatus is improved in reliability during a garage shifting with reducing costs of the apparatus. An electronic control unit controls equalizing the shift pattern (on-off pattern) during a first garage shifting when a manual valve is shifted fr... | 04/29/2008 |
| 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 |
| 7282005 | Hydraulic control apparatus of automatic transmission A hydraulic control apparatus of an automatic transmission. The hydraulic control apparatus of the automatic transmission has a hydraulic servo for controlling an engaging state of a clutch C-1 on the basis of supplied oil pressure, a linear solenoid valve fo... | 10/16/2007 |
| 7261674 | Hydraulic control apparatus for automatic transmission A hydraulic control apparatus for an automatic transmission provided with a friction engaging element that operates using hydraulic pressure includes a range pressure oil passage which is connected to the friction engaging element; a manual valve which is connected ... | 08/28/2007 |
| 7226386 | Vehicle transmission control system Clutch pressure is reduced to an initial pressure, and a transmission operation state is stored, when a vehicle is stopped with an engine in an idling state. The clutch pressure is further reduced at a constant change rate and the amount of time is measured until th... | 06/05/2007 |
| 7220214 | Shift control system for automatic transmission A shift control system for an automatic transmission. The shift control system includes an oil temperature sensor, a hydraulic controller to operate a hydraulic clutch, and a control unit in operative communication with the oil temperature sensor and the hydraulic c... | 05/22/2007 |
| 7213570 | Method and apparatus for controlling throttle during vehicle coasting A method and system to improve fuel economy of an engine on a vehicle is offered. An electronic throttle control device is commanded to a wide open throttle position during vehicle coast down, thus improving engine breathing and reducing pumping losses, and improvin... | 05/08/2007 |
| 7172528 | Transfer case with overdrive/underdrive shifting A transfer case for a vehicle that includes a planetary gear assembly, a clutch pack assembly, and a band and drum assembly that provide an overdrive or underdrive and direct drive in combination with a vehicle transmission. In one embodiment, an input shaft drives ... | 02/06/2007 |
| 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 |
| 7108632 | Control apparatus of automatic transmission An automatic transmission including plural friction engaging elements configures plural shift ranges based on combinations of each friction engaging element being in engaging or disengaging condition and a controlling unit for controlling the friction engaging eleme... | 09/19/2006 |
| 7104925 | Automatic transmission and method of setting a standby oil pressure value Under the learning mode during a vehicle stationary condition, an oil pressure of the friction engagement element for setting a standby oil pressure value is increased by a predetermined step pressure while a transmission input shaft rotational speed has been mainta... | 09/12/2006 |
| 7043347 | Hydraulic clutch control of vehicle power train A hydraulic clutch transmits driving torque in a power train of a vehicle. An oil pressure supply unit supplies oil pressure for engagement to the clutch and a controller controls the unit. The controller causes the unit, prior to engagement of the clutch, to precha... | 05/09/2006 |
| 7001299 | Control apparatus of automatic transmission According to an aspect of the present invention, an automatic transmission includes plural friction engaging elements configures plural shift ranges based on combinations of each friction engaging element being in engaging or disengaging condition, a controlling uni... | 02/21/2006 |
| 6997837 | Shift control system of automatic transmission for vehicle and shift control method thereof In a shift control system of an automatic transmission for a vehicle, an engaging torque applied to a predetermined friction element that has been engaged to establish a predetermined gear stage of the automatic transmission during running of the vehicle is graduall... | 02/14/2006 |
| 6978201 | Model based kickdown shift method for clutch to clutch shift transmissions with accumulators A transmission control method improves shift feel during kickdown shifts. The release clutch is fully released at the initiation of the kickdown shift. The release clutch is then reapplied when the volume of the release clutch reaches a threshold capacity. The volum... | 12/20/2005 |
| 6960153 | Clutch engagement control of automatic transmission A clutch engagement control device controls the engagement of a forward clutch (32) and reverse clutch (33) in an automatic transmission connected to an engine (70) in a vehicle. An inhibitor switch (56) outputs a range signal in accordan... | 11/01/2005 |
| 6872166 | Automatic transmission system and method for controlling thereby An automatic transmission system for a vehicle includes a rotational speed detector for detecting a variation of a rotation number of driving torque transmitting member when a friction engagement element, which has been disengaged based upon oil pressure controlled ... | 03/29/2005 |
| 6827667 | Select-shock control system and method for automotive automatic transmission The method for decreasing gear select shock comprises determining whether a vehicle is stopped and if idle conditions exist based on vehicle operating parameters. It is then determined whether the vehicle has been stopped for longer than a predetermined period. If i... | 12/07/2004 |
| 6746355 | Hydraulic control system for automatic transmission A hydraulic control system for an automatic transmission, in which four forward speeds and one reverse speed are realized by the use of a reduced number of friction elements compared to the prior art such that overall structure is simplified, the weight of the autom... | 06/08/2004 |
| 6736755 | Controller for automatic transmissions There are arranged an engine 10 having idle-stop control means and an automatic transmission 20 having as a hydraulic-pressure supply source a main pump 22 driven by the engine 10 to perform speed change control. There are arranged a bypa... | 05/18/2004 |
| 6736756 | Shift control apparatus of automatic transmission and method therefor A shift control apparatus of an automatic transmission of a vehicle and a method therefore is disclosed, the method comprises the steps of: discriminating whether a shift lever of the automatic transmission is switched from reverse range ‘R’ to neutral range ‘... | 05/18/2004 |
| 6723022 | Device and method for shift controlling of automatic transmission in vehicle Device and method for shift control in an automatic transmission of a vehicle wherein the feedback control includes determining relative rate of change in turbine revolution during power-on up-shift, thereby preventing generation of shift impact in the shifting proc... | 04/20/2004 |
| 6723021 | Gear actuator for engaging and/or disengaging gears of a transmission A gear actuator for engaging and disengaging gears in an automatic manual transmission has a single working piston or two working pistons provided with a first working piston surface and a second working piston surface. An auxiliary piston is provided also. A pressu... | 04/20/2004 |
| 6676567 | Speed change completion degree estimating system of automatic transmission and speed change control device using same An automatic transmission is driven by an engine through a torque converter. The transmission includes a plurality of friction elements which are selectively engaged to provide a selected gear thereby to transmit the power of engine to an output shaft of ... | 01/13/2004 |
| 6666794 | Apparatus and method for controlling automatic transmission When a racing of engine occurred during a speed change, an oil pressure is forcibly supplied to a friction engagement element to be released, and a back pressure of an accumulator disposed in an oil supply pipe of this friction engagement element of relea... | 12/23/2003 |
| 6659912 | Shift control system for automatic transmission When a transmission selector lever is operated from P or N range to D range, an input clutch to be engaged at the fifth gear position is temporally engaged to reduce shift shock when the engaging element for the first gear position is engaged. An oil pres... | 12/09/2003 |
| 6572510 | Control device of automatic transmission In a process wherein a before-shifting gear ratio Gx changes to a gear ratio of the target gear position, an actual shift time is measured by regarding as a shift starting point an earlier one between a time point when the present gear ratio G has repeate... | 06/03/2003 |
| 6569060 | Method for controlling a transmission of a vehicle A method for controlling a transmission of a motor vehicle, especially of an automatic transmission or of an automated manual mechanical transmission. The transmission has hydraulically actuatable shifting elements which, during gear shifts, are engaged o... | 05/27/2003 |
| 6530862 | System and method for compression braking within a vehicle having a variable compression ratio engine A system and method for braking a vehicle 12 having a variable compression ratio engine 14 and a compression braking system 16. System 10 is adapted to utilize the variable compression ratio engine 14 and the compression braking system 16 in a synergistic... | 03/11/2003 |
| 6511400 | Control system for vehicular automatic transmission A control system for executing an upshift from an off-going speed ratio to an on-coming speed ratio by controlling the release of the hydraulic pressure from the frictionally engaging element used for the off-going speed ratio and by controlling the suppl... | 01/28/2003 |
| 6361472 | Controller for an automatic transmission In gear-shift control performed during normal travelling, a drive frequency of each solenoid valve is set to a higher one to suppress fluctuations or changes of a quantity or speed of a flow of a hydraulic oil concerned when the solenoid current is turned... | 03/26/2002 |
| 6325742 | Shift control system and method for automatic transmission when shifting into drive after reverse The shift control system for an automatic transmission in a vehicle includes a plurality of sensors and a transmission control unit. The plurality of sensors sense operating conditions of the vehicle. The transmission control unit controls shift control s... | 12/04/2001 |
| 6319170 | Model-based engine torque control for power-on downshifting in an automatic transmission An improved engine torque control for an automatic transmission power-on downshift, wherein a dynamic model of the transmission is used to schedule both shift progression and engine torque reduction based on a desired trajectory of the transmission input ... | 11/20/2001 |
| 6317671 | Control apparatus for automatic transmission A control apparatus for an automatic transmission capable of sufficiently producing the effect of neutral control by reducing a period of time from stop of a vehicle to the release of an input clutch. Vehicle stop prediction means for predicting immediate... | 11/13/2001 |
| 6202015 | Hydraulic control system of automatic transmission In an automatic transmission of a motor vehicle, in which a hydraulic pressure is supplied to a piston of a friction element is maintained at a first level that is lower than a given level at which the friction element is engaged, while the vehicle that i... | 03/13/2001 |
| 6183393 | Method for reducing jerking during gear shifting The invention relates to a method to reduce jerking during shifting in an automatic gear box. The automatic gear box has a selection lever (22) with a forward drive (D) and reverse (R) operating positions, in addition to a parking position (P) and a neutr... | 02/06/2001 |
| 6135916 | Process for controlling the pressure of a CVT during a standing start A pressure controlling system for a CVT of the belt with bevelled pulley type is proposed in which, on detection of a shift from the neutral or park position, the pressure in the primary and secondary pulleys is raised to a first level. This ensures that ... | 10/24/2000 |
| 6128565 | Hydraulic control system for automatic transmission In a disengagement side control, in a power on state, a disengagement side pressure PW is output, PW being set higher than a base pressure dependent on input torque, and a disengagement side frictional engagement element is engaged a... | 10/03/2000 |
