发明授权
- 专利标题: Control apparatus for hydraulically operated vehicular transmission
- 专利标题(中): 液压操纵车辆变速箱控制装置
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申请号: US935941申请日: 1997-09-23
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公开(公告)号: US6068575A公开(公告)日: 2000-05-30
- 发明人: Shoichi Tanizawa , Shinichi Nishio , Takehiro Katakura , Kazuo Okada , Tatsuyuki Ohashi , Kouji Shibuya , Norio Nakauchi , Osahide Miyamoto , Akio Tsuura
- 申请人: Shoichi Tanizawa , Shinichi Nishio , Takehiro Katakura , Kazuo Okada , Tatsuyuki Ohashi , Kouji Shibuya , Norio Nakauchi , Osahide Miyamoto , Akio Tsuura
- 申请人地址: JPX Tokyo
- 专利权人: Honda Giken Kogyo Kabushiki Kaisha
- 当前专利权人: Honda Giken Kogyo Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX8-253628 19960925; JPX8-253632 19960925; JPX8-253633 19960925
- 主分类号: F16H59/44
- IPC分类号: F16H59/44 ; F16H59/46 ; F16H59/70 ; F16H59/78 ; F16H61/04 ; F16H61/06 ; F16H61/08 ; F16H61/16
摘要:
At downshifting, hydraulic pressure of hydraulic clutch on engaging side (ON clutch pressure) is increased when an input and output speed ratio ("Gratio") has fallen below a predetermined value YGDNS. YGDNS is variably set depending on the vehicle speed and the engine temperature so that it becomes a lower value at a high vehicle speed than at a low vehicle speed, and a higher value at a low engine temperature than at a high temperature. When a downshifting command to a still lower speed stage is issued during downshifting control (when FTBD=1), a downshifting completion processing is performed in the course of the downshifting control (step in S111). Oil pressure in a hydraulic engaging element on the disengaging side QDNOFF and oil pressure in a hydraulic engaging element on the engaging side QDNON are switched to the oil pressures at the time of completion of downshifting, to thereby complete the first step downshifting control at an early time. In order to prevent unnecessary speed changing at the time of tire locking, downshifting is prohibited when deceleration of the vehicle speed has exceeded a predetermined value (when a setting of FLOCK=1 is made).
公开/授权文献
- US5423048A Branch target tagging 公开/授权日:1995-06-06