发明名称 |
METHOD OF CALIBRATING A HYDRAULICALLY OPERATED CLUTCH OF A CONTINUOUSLY VARIABLE TRANSMISSION USING PRESSURE BETWEEN A HYDROSTATIC PUMP AND MOTOR |
摘要 |
A method of calibrating a hydraulically operated clutch in a continuously variable transmission of a vehicle, includes steps of filling the clutch as if for a shift, using a control signal value for achieving a test pressure, and determining a resulting change in a pressure condition in a hydrostatic power unit of the transmission. If the change indicates initial engagement, then a value representative of the signal value used is recorded. If greater than initial engagement is indicated, or the vehicle moved, then the clutch is emptied and tested using a lower test pressure. If initial engagement is not indicated, the clutch is emptied and refilled to a greater test pressure. An exemplary pressure condition is a difference in pressure in lines between a pump and motor of the power unit. During the calibration, the vehicle can be held stationary with a parking brake or the like. |
申请公布号 |
EP2748480(A1) |
申请公布日期 |
2014.07.02 |
申请号 |
EP20120825630 |
申请日期 |
2012.08.27 |
申请人 |
CNH INDUSTRIAL ITALIA S.P.A. |
发明人 |
DIX, PETER, J.;BULGRIEN, GARTH, H.;PRASSE, ROBERT, C.;KUROS, PAWEL |
分类号 |
F16D48/02;F16D48/06 |
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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