| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight and compact multi-ratio transmission further improved in fuel economy, drivability, transmission performance and engagement element durability of a vehicle in which the multi-ratio transmission is installed.SOLUTION: An automatic transmission 20 comprises a single pinion type first planetary gear 21, a single pinion type second planetary gear 22, a single pinion type third planetary gear 23, a single pinion type fourth planetary gear 24, clutches C1 to C4, and brakes B1 and B2. Three of the clutches C1 to C4 and brake B1 and B2 are engaged and the other three thereof are released so as to form forward first to tenth speeds and a reverse. |
