发明名称 |
Hydraulic control circuit for a continuously-variable-transmission |
摘要 |
The present invention provides an hydraulic control circuit for a continuously-variable-ratio transmission An hydraulic control circuit for a CVT transmission includes a first hydraulic pressure control valve V1 for controlling the pressure of hydraulic fluid to be supplied to the roller control pistons of the variator and a second hydraulic pressure control valve V2 for controlling the pressure of hydraulic fluid to be supplied to a clutching arrangement of the transmission. Said valves V1, V2 are connected in flow series and by a first fluid directing valve means V3(S1, S2) for directing flow from each pump PL, PR to a first point P upstream of valve V1 or to a second point P downstream of valve V1 but upstream of valve V2. By adopting such an arrangement it is possible to control the clutches without affecting the roller position and vice versa.
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申请公布号 |
US6626793(B1) |
申请公布日期 |
2003.09.30 |
申请号 |
US20000678483 |
申请日期 |
2000.10.04 |
申请人 |
TOROTRAK (DEVELOPMENT) LIMITED |
发明人 |
GREENWOOD CHRISTOPHER JOHN |
分类号 |
F16H15/38;F16H37/06;F16H47/04;F16H61/00;F16H61/06;F16H61/662;F16H61/664;(IPC1-7):F16H15/38 |
主分类号 |
F16H15/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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