发明授权
- 专利标题: Shift control system for an automatic transmission
- 专利标题(中): 自动变速箱换档控制系统
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申请号: US505608申请日: 1990-04-06
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公开(公告)号: US5024125A公开(公告)日: 1991-06-18
- 发明人: Fumiaki Baba
- 申请人: Fumiaki Baba
- 申请人地址: JPX Hiroshima
- 专利权人: Mazda Motor Corporation
- 当前专利权人: Mazda Motor Corporation
- 当前专利权人地址: JPX Hiroshima
- 优先权: JPX1-86993 19890407
- 主分类号: B60W10/02
- IPC分类号: B60W10/02 ; B60W10/10 ; F16H59/70 ; F16H59/72 ; F16H61/02 ; F16H61/04 ; F16H61/10 ; F16H63/44
摘要:
A shift control system for the vehicle contains a torqueconverter, a multiple stage gear mechanism adapted for a shift of an operating state of a friction coupling means of a hydraulic pressure type which is coupled to the torque converter, a temperature sensor for sensing temperatures of the operating oil for the torque converter and the friction coupling element, and a control unit for shift control. The control unit controls operation of the friction coupling elements on the basis of a predetermined shift characteristic and shifts the shift characteristic, when the temperature of the operating oil to be sensed by the temperature sensor is lower than a given value, is in such a manner that the area of driving at least for first speed stage is narrowed.
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