| 摘要 |
PURPOSE:To make proper control over a lockup mechanism performable at all times, by setting a feedback controlled variable on the basis of a feedback gain conformed to a deviation in sliding velocity of a hydraulic power transmission and another feedback gain conformed to engine load. CONSTITUTION:A difference between engine speeds at both input and output sides of a hydraulic power transmission, to be detected by each of engine speed detecting devices A and B at both input output sides is calculated at an operational device C. And, a deviation between this engine speed difference and a desired engine speed difference out of a setting device D is calculated at a deviation operational device E, and according to this deviation, a first feedback gain is set at a determinating device F. In addition, a second feedback gain is set at a determinating device H on the basis of output of an engine load detecting device G. And, on the basis of the aforesaid deviation and both first and second feedback gains, a feedback controlled variable is set at a determinating device I, and a solenoid valve K is controlled via a feedback controlling device J in conformity with this controlled variable.
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