Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control
Patent
1997-01-24
1999-06-29
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Clutch control
701 68, 192331, 477169, G06G 770, F16D 3300
Patent
active
059162937
ABSTRACT:
A lockup control apparatus for use with an automotive vehicle having an engine, an automatic transmission and a torque converter operable in a coast lockup mode having a lockup capacity to provide a controlled degree of mechanical connection between the engine and the automatic transmission when the vehicle is coasting. The apparatus employs a memory having a desired value for the lockup capacity stored therein. A first signal is produced when a slip rotation occurs in the torque converter and a second signal is produced when the coast lockup mode is released. The desired lockup capacity value is updated with a greater value in response to the first signal. A frequency at which either of the first and second signals occurs is measured. The desired lockup capacity value is updated with a smaller value when the measured frequency exceeds a reference value. The lockup capacity is controlled based on the desired lockup capacity value stored in the memory to retain the frequency of occurrence of the first signal in a predetermined range.
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"Service Manual for Nissan Full-Range Electronically Controlled Automatic Transmission 5E-AT, RE5R01A Type", Nissan Motor Co., Ltd., Jun. (1989), pp. A14-A15 and A43-A45.
Katakura Shusaku
Shimizu Hirofumi
Takizawa Satoshi
Toujima Hisaaki
Toukura Nobusuke
Louis-Jacques Jacques H.
Nissan Motor Co,. Ltd.
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