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| Number | Title | Issue Date |
| 8092330 | Control for an automatic transmission A system for controlling a transmission includes a gear selector, a manual valve for connecting a pressure source alternately to Drive and Reverse lines in response to movement of the gear selector between selected Drive and Reverse positions, first and second solen... | 01/10/2012 |
| 7678006 | Automatic transmission of motor vehicle A first data section is provided that has a given data actually used when a frictional element is operated under a manual shift mode for providing an engine brake, and a second data section is provided that is actually used when an automatic shift is carried out. A ... | 03/16/2010 |
| 7666113 | Control apparatus and method for automatic transmission A control apparatus of an automatic transmission having first and second frictional engagement elements that achieve higher and lower speed gear stages respectively, includes a target value determination section setting a rotation speed difference between input and ... | 02/23/2010 |
| 7476173 | Park inhibit solenoid assembly and system incorporating the same A park inhibit solenoid system and system incorporating the same. The solenoid may include a bracket at least a portion of which may be generally u-shaped with a downwardly oriented opening. A generally u-shaped follower is at least partially disposed in the bracket... | 01/13/2009 |
| 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 |
| 7300378 | Multi-speed planetary transmissions having clutched input members and providing at least eight speed ratios 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 ... | 11/27/2007 |
| 7139652 | Range selection control device of automatic transmission A range selector issues a range selection command signal representative of an operation range of a shift-by-wire type automatic transmission meeting with a driver's intention. The operating range is at least one of P(parking)-range, R(reverse)-range, N(neutral)-rang... | 11/21/2006 |
| 7128684 | Planetary transmissions having a stationary fixed interconnection and up to three input clutches The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward torque ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting... | 10/31/2006 |
| 7090614 | Automatic transmission and method for determining hydraulic pressure characteristics value for automatic transmission An automatic transmission includes a plurality of frictional engagement elements for constructing plural shift stages with combinations of engagement and disengagement thereof, a control portion for controlling the engagement and the disengagement of the frictional ... | 08/15/2006 |
| 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 |
| 6866611 | Vehicle range shift mechanism A judging section judges whether or not ranges detected, respectively, by a first range detection section consisting of a first detection section and a position detecting sensor, and a second range detection section consisting of a second detection section; a C1 ... | 03/15/2005 |
| 6849018 | Actuator for an automatic transmission provided with electrical actuation An electrical actuation for an automatic transmission, preferably for selection actuation in automobiles in which a four-bar linkage transmission and a worm gear unit are arranged between the electric drive and the transmission. Shifting can be carried out with a lo... | 02/01/2005 |
| 6773369 | Control device for an automatically and manually shiftable gearbox in a motor vehicle The invention relates to a control device (1) for an automatically and manually shiftable gearbox in a motor vehicle. The inventive control device comprises a selector lever (2) for adjusting at least the forward position (D), neutral (N), reverse (R),... | 08/10/2004 |
| 6767304 | Control system for an eight-speed automatic transmission An eight-speed automatic transmission having a compound planetary gear set, a second planetary gear set, and a third planetary gear set each driven by three clutches and fixed to four brakes. A hydraulic control system actuates the eight-speed transmission by select... | 07/27/2004 |
| 6702702 | Automatic gearbox having a control device for selecting a gearbox driving position An automatic gearbox includes a control device for selecting a gearbox driving position, which device includes at least one spool valve via which at least one pressure connection may be connected to at least one consumer, and having at least one shift val... | 03/09/2004 |
| 6699155 | Vehicle transmission controller A vehicle transmission controller controls switching of the gear position of a transmission. The controller has a shift lever and an actuator. The shift lever is manipulated to select a gear position of the transmission. The actuator actuates the transmis... | 03/02/2004 |
| 6659900 | Apparatus for controlling vehicle transmission A control apparatus for increasing the reliability of the range shifting of the transmission based on the operation of a shift lever. Only when a shift permission switch is operated by a driver and the shift lever is operated does a determination circuit ... | 12/09/2003 |
| 6537171 | Actuator for an automatic transmission provided with electrical actuation An electrical actuation for an automatic transmission, preferably for selection actuation in automobiles in which a four-bar linkage transmission and a worm gear unit are arranged between the electric drive and the transmission. Shifting can be carried ou... | 03/25/2003 |
| 6120406 | Automatic transmission with energy saving logic and failsafe operations An automatic transmission is provided with failsafe operation via a unique manual valve and multi-select solenoid arrangement. The transmission also provides for an energy saving logic operation mode.... | 09/19/2000 |
| 5984818 | Hydraulic control system for automatic transmissions Disclosed is a hydraulic control system for automatic transmissions. The hydraulic control system includes line pressure control means for controlling hydraulic pressure generated by an oil pump into line pressure suitable for each shift range; converter ... | 11/16/1999 |
| 5515272 | Apparatus for diagnosing automatic transmission based on engine speed as compared with reference range A diagnosing apparatus for diagnosing a vehicle automatic transmission system including an automatic transmission having frictional coupling devices, and solenoid-operated valves for controlling the frictional coupling devices to shift the automatic trans... | 05/07/1996 |
| 5478289 | Transmission control method for a vehicle A transmission control method for a vehicle, with which torque starvation does not occur during shifting operation, and wherein shift between drive ranges in forward and reverse respectively is performed by engagement and disengagement of forward and reve... | 12/26/1995 |
| 5433124 | Electronic range selection in an automatic transmission A hydraulic latch for directing line pressure alternately to a forward drive circuit and a reverse drive circuit includes three solenoid-operated select valves that direct pressure from a line pressure source to a reverse drive select valve, a forward dri... | 07/18/1995 |
| 5385511 | Select shock attenuating method and system for automatic transmission According to a select shock attenuating method, line pressure, under which hydraulic fluid is supplied to hydraulically actuable and frictionally engageable coupling or couplings which are assigned to establish a gear ratio in an automatic transmission, i... | 01/31/1995 |
| 5364317 | Control system for automotive automatic transmission A control system solves a drawback which would occur when a shift lever is returned from N-position to D-position (or any Forward position) after a previous shifting from D-position to N-position. The control system comprises a first control device for de... | 11/15/1994 |
| 5351570 | Electronically controlled automatic transmission for vehicles (1) Various gear states are selected by movement of a shift lever 2 in a longitudinal shift path 13 and the gear stage is automatically shifted from starting to the maximum gear stage in an automatic speed change position D, so that an operator can run a ... | 10/04/1994 |
| 5178043 | Control valve assembly of traction drive transmission A traction drive transmission includes a forward reverse change-over mechanism followed by a half-toroidal dual-cavity traction drive system. A control valve assembly includes a valve body. The valve body has on its periphery a mount site and formed with ... | 01/12/1993 |
| 4944200 | Method of applying reverse gear in an automatic transmission A method of reverse clutch operation prevents excessive wear of the reverse clutch in a four-speed automatic transmission by venting one clutch, filling the reverse clutch and applying it, and filling and reapplying the one clutch.... | 07/31/1990 |
| 4907475 | Fluid switching manually between valves in an automatic transmission A valve assembly in a fluid system of a vehicle transmission directs fluid flow from a fluid source to at least one fluid actuated device. The assembly includes a first solenoid-actuated valve for directing fluid flow to a first fluid actuated device and ... | 03/13/1990 |
| 4603603 | Electronic transmission shift controller having a controlled alignment valve mechanism The drive establishing mechanisms of a multigear ratio transmission are actuated according to a predetermined schedule with an electronically operated two member valve mechanism. Gear shifting is effected by producing relative movement between the valve m... | 08/05/1986 |
| 4598374 | Gearshift selection system for a power-assisted transmission A vehicle gearshift selection system for a multiple-speed power-assisted transmission having a gearshift lever which is shiftable into a single shift-up position or a single shift-down position. A gear sensor for monitoring the position of the gearshift l... | 07/01/1986 |
| 4519273 | Automatic transmission for vehicles An automatic vehicle transmission is operated simply by driver selection of a forward or backward switch, utilizing an electric and hydraulic control system to effect speed changes among the various forward speeds, neutral and park. Also, during a shift, ... | 05/28/1985 |
| 4468987 | Control system for multi-ratio gearing A master controller can be set by the driver in any of a range of forward drive positions D1 to D6 to pre-set upper and lower limits to the engine speed in any of a range of forward ratios such that any increase or reduction in vehicle speed which would c... | 09/04/1984 |
| 4345489 | Hydraulic control system for servos in automatic transmissions The invention pertains to a hydraulic control system for servos in automatic transmissions, which, in a known fashion, utilizes a main pressure valve to regulate the pressure within the control system and further utilizes a converter pressure valve to sup... | 08/24/1982 |
| 4326433 | Hydraulically controlled power transmission having friction plate clutches for selectively engaging a plurality of change speed gears A hydraulically controlled transmission for vehicles such as heavy-duty, high horsepower, off-highway trucks, the transmission having a plurality of selectively engagable change speed gears and hydraulically actuated friction type clutches for selectively... | 04/27/1982 |
| 4290322 | Electronic transmission control A control system for a multi-speed transmission having a plurality of friction devices with at least two friction devices being engaged for each speed range includes an electric circuit for controlling the supply of pressurized fluid from a source to and ... | 09/22/1981 |
| 4253346 | Electrohydraulic speed-change device for a load-shiftable reversing transmission for an automotive vehicle An electrohydraulic speed change system for a load-shiftable gear transmission of an automotive vehicle in which hydraulic devices such as clutches and brakes are operated by electromagnetic actuation of respective valves of the hydraulic system. The spee... | 03/03/1981 |
| 4218938 | Control system for a differential gear lock mechanism A control system for a differential gear lock mechanism including a power transmission having at least two forward drives and a backward drive and a manually operated speed change lever associated with said power transmission. The control system comprises... | 08/26/1980 |
