| 摘要 |
PURPOSE:To eliminate gear change shock by mounting a gear step judgement means, a latest duty ratio calculating means, and a means which outputs a pressure adjusting signal which drives a control solenoid based on the calculated duty ratio to a control solenoid drive control means. CONSTITUTION:When a gear step judgement means 3 judges gear change by output signals of an output shaft rotating speed detection means 1 and a throttle opening detection means 2, a latest duty ratio calculating means 6 calculates latest duty ratio which control solenoids S1, S3 take by start duty ratio, end duty ratio, and duty control time which are previously set at the time of respective gear change. A pressure adjusting signal output means 7 outputs a pressure adjusting signal to the control solenoids S1, S3 based on the latest duty ratio. Consequently, engagement and release of friction engaging element of a planetary gear mechanism of automatic change gear are not done abruptly, and there is no gear change shock. Also, it eliminates a necessity of one-way clutch and accumulator. |
