| 摘要 |
PURPOSE:To remove speed change shock and improve speed change sense by starting change of rotating number to high gear shift of a sub speed change gear and completing while a main speed change gear performs change in rotating number to low gear shift and by performing down shift entirely. CONSTITUTION:When speed change is judged, an electromagnetic solenoid valve S1 is turned OFF so as to changeover a first shift valve 200 controlling a main speed change gear after a predetermined time T1, and oil pressure of a brake B2 is dropped and low gear shift of the main speed change gear is started, and rotating number of each member of the main speed change gear begins to change. Then, an electromagnetic solenoid valve S3 is given speed change instruction of a brake B0 is supplied, and high gear shift of a sub speed change gear is started, and connection is completed while the main speed change gear is in inertia phase. |
