发明名称 |
Control system for a torque converter lock-up clutch. |
摘要 |
<p>A control system for a torque converter lock-up clutch operates in a hydraulic circuit having line pressure applied to a lock-up clutch control valve and supplied selectively to a clutch-apply pressure chamber or a clutch-release pressure chamber. The control valve includes a valve spool, four control lands and a valve spring urging the control body to a starting position where the valve directs line pressure to the release pressure chamber and connects the apply pressure chamber to a cooler. When control pressure is applied, the valve spool moves to a shift-up position, supplies line pressure to the apply pressure chamber and connects the release-pressure chamber to an outlet line. A pulse-width modulated solenoid valve varies pressure in the release-pressure chamber by means of a throttle opening in the clutch plate, whereby control pressure is modulated so that force between the friction surfaces of the clutch is reduced to allow clutch slippage.</p> |
申请公布号 |
EP0414088(B1) |
申请公布日期 |
1993.10.27 |
申请号 |
EP19900115483 |
申请日期 |
1990.08.11 |
申请人 |
FORD-WERKE AKTIENGESELLSCHAFT;FORD MOTOR COMPANY LIMITED;FORD FRANCE S. A. |
发明人 |
VON DER LIPPE, WOLFGANG;BIEDERMANN, SIEGHART;WIRTZ, HANS-PETER;KIRCHHOFFER, JOHANN;SCHULZ, WINFRIED |
分类号 |
F16H59/46;F16H61/14;(IPC1-7):F16H61/14 |
主分类号 |
F16H59/46 |
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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