| 摘要 |
<p>PURPOSE:To prevent abrupt engine speed rising by accelerator pedal depressing by delivering hydraulic oil from a servo-unit abruptly through an oil delivery passage orifice and a branch oil passage, when shifting a gearshift lever from N or P range to D range. CONSTITUTION:To engage a clutch CL by a hydraulic servo-unit 130, an orifice to restrict flow of hydraulic oil is provided in the hydraulic oil delivery passage in the hydraulic servo-unit 130 and a branch oil delivery passage branched from the oil delivery passage is provided to deliver the hydraulic oil without passing through the orifice. An oil passage opening and closing means to open and close the branch oil delivery passage is operated according to the degree of engagement of the clutch. Until the clutch starts to transmit a specified creep force from under the completely released condition, the branch oil delivery passage is opened; until the clutch is engaged completely from under the condition that it transmits a specified creep force, the branch oil delivery passage is closed. Thus abrupt engine speed rising due to delay of clutch valve closing can be prevented.</p> |
