| 摘要 |
PROBLEM TO BE SOLVED: To improve fuel consumption and driveability of a vehicle mounted with a multistage transmission, transmission performance of the multistage transmission and durability of an engaging element of the multistage transmission, and make the multistage transmission lightweight and compact.SOLUTION: An automatic transmission 20 includes single pinion-type first-fourth planetary gears 21-24, clutches C1-C4, and brakes B1 and B2. Any three of the clutches C1-C4 and the brakes B1 and B2 are engaged with one another, and the remaining three of them are released. Thus, forward and backward stages from a first speed stage to an eleventh speed stage are formed. |
