| 摘要 |
<p>PROBLEM TO BE SOLVED: To smoothly shift up without imparting a sense of incompatibility to an occupant by synchronizing an output shaft rotating speed with an engine speed at the shift-up time by controlling an electronic control throttle valve, and smoothly changing clutch oil pressure of a high speed side shift stage. SOLUTION: In a transmission, a first speed and a second speed are established by fastening/releasing a driving gear 112 to/from an output shaft 105, and a third speed to a fifth speed are established by fastening/releasing a drive gear to/from an input shaft 104. The first speed to the fourth speed are fastened/ released to a shaft by a synchronizer mechanism 117, and the mechanism 117 is operated by a shift fork 110 controlled by a shift cylinder 108 and a select cylinder 109. In this case, at shift-up time, an output shaft rotating speed and an engine speed are synchronized by control of an electronic control throttle valve 120, and clutch oil pressure of the fifth speed is smoothly changed to high speed side torque from low speed side torque to guarantee a smooth shift.</p> |
