发明授权
- 专利标题: Lockup control apparatus
- 专利标题(中): 锁定控制装置
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申请号: US789613申请日: 1997-01-24
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公开(公告)号: US5916293A公开(公告)日: 1999-06-29
- 发明人: Shusaku Katakura , Satoshi Takizawa , Hisaaki Toujima , Nobusuke Toukura , Hirofumi Shimizu
- 申请人: Shusaku Katakura , Satoshi Takizawa , Hisaaki Toujima , Nobusuke Toukura , Hirofumi Shimizu
- 申请人地址: JPX Yokohama
- 专利权人: Nissan Motor Co., Ltd.
- 当前专利权人: Nissan Motor Co., Ltd.
- 当前专利权人地址: JPX Yokohama
- 优先权: JPX8-010688 19960125; JPX8-010689 19960125
- 主分类号: F16H59/18
- IPC分类号: F16H59/18 ; F16H59/22 ; F16H61/14 ; G06G7/70 ; F16D33/00
摘要:
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.