发明授权
- 专利标题: Hydraulic control apparatus for a continuously variable transmission
- 专利标题(中): 用于无级变速器的液压控制装置
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申请号: US949978申请日: 1997-10-14
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公开(公告)号: US5888168A公开(公告)日: 1999-03-30
- 发明人: Tsunefumi Niiyama , Yasushi Ohmatoi
- 申请人: Tsunefumi Niiyama , Yasushi Ohmatoi
- 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: JPX8-270256 19961011
- 主分类号: F16H9/00
- IPC分类号: F16H9/00 ; F16H61/00 ; F16H61/662 ; F16H63/24 ; F16H9/10
摘要:
A hydraulic control apparatus for a continuously variable transmission which can produce stable drive pulley pressure and driven pulley pressure and also control the speed change time. The line pressure regulated by the regulator valve 22 is supplied to the control valve 24.sub.DR of the drive pulley 5 and to the control valve 24.sub.DN of the driven pulley 7. These control valves regulate the line pressure according to the PB pressure and the PC pressure output from the solenoid valves SOL-B, SOL-C, respectively, and produce the drive pulley pressure P.sub.DR and the driven pulley pressure P.sub.DN. When the PB pressure and the PC pressure are both zero, and P.sub.DR =P.sub.DN, the control apparatus maintains the same gear ratio. When the PB pressure is increased from zero while keeping the PC pressure at zero, i.e. P.sub.DR >P.sub.DN, the gear ratio changes toward the high-speed overdrive. When the PC pressure is increased from zero while holding the PB pressure at zero, i.e. P.sub.DR