| 摘要 |
<p>PURPOSE:To suppress the speed change shock by temporarily reducing the fuel feed quantity when a frictional engagement element of a hydraulic type automatic transmission is put into engagement state from nonengagement state through speed change operation. CONSTITUTION:A hydraulic type automatic transmission 9 transmits the output of an engine 11 to a driving wheel through the speed change treatment of the output of the engine 11, and supplies and discharges the hydraulic pressure into the frictional engagement elements such as clutch and brake, and the speed change ratio selection (speed change) is carried out automatically in correspondence with the driving state of a car by selecting the revolution elements such as arbitrary rotary drum and gear. When, in this automatic transmission 9, a frictional engagement element is put into engagement state from the nonengagement state (N range) through speed change operation by a shift lever 7, and an accelerating pedal 1 is stepped in, a throttle valve 5 is closed for a prescribed time by a controller 3. Therefore, the increase of the engine revolution is suppressed, and speed change shock can be prevented.</p> |
