发明名称 |
Closed loop control of shifting clutch actuators in an automatic speed change transmission |
摘要 |
A method of controlling hydraulic shift clutch actuators in an automatic speed change power transmission of the type having an electronic controller (TCU) for energizing a solenoid operated valve to control each hydraulic clutch actuator. A pressure sensor is disposed to sense the hydraulic pressure (P s ) to each clutch actuator and provides an electrical signal to the TCU which also receives a clutch pressure command signal (P c ) from the vehicle powertrain computer. The TCU computes the differential ”P = P c - P s and determines the valve energization current I E from known relationships between ”P and the percentage of maximum valve current and repeats the process in real time to adjust I E until ”P is negligible. |
申请公布号 |
EP1433982(A2) |
申请公布日期 |
2004.06.30 |
申请号 |
EP20030028192 |
申请日期 |
2003.12.09 |
申请人 |
EATON CORPORATION |
发明人 |
FORD, GREG E.;JACOBSEN, PETER M.;BOWMAN, HAROLD L. |
分类号 |
F16D48/02;F16H61/02;B60W10/18;F16H57/04;F16H59/68;F16H61/00;F16H61/06;F16H61/30;F16H61/68;(IPC1-7):F16H61/02 |
主分类号 |
F16D48/02 |
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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