| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain the travelling state of a vehicle even if a trouble occurs in an electric system. <P>SOLUTION: This speed-change device comprises first and second input shafts having drive gears and an output shaft having a driven gear meshed with a drive gear to form a speed-change gear train. The device also comprises a first input clutch 18 transmitting power to a first input shaft and a second input clutch 19 transmitting power to a second input shaft. Each of input clutches 18 and 19 comprises solenoid valves SOL1 and SOL2 controlling the supply of hydraulic pressure. Line pressure oil passages 60 and 52 are formed between a line pressure supply part 45 and the first input clutch 18 parallel with the solenoid valve SOL1, and line pressure oil passages 60 and 54 are formed between the line pressure supply part 45 and the second input clutch 19 parallel with the solenoid valve SOL2. The device also comprises a clutch selector valve 49 which allows the line pressure oil passages 60 and 52 to communicate with each other by the engagement of the first input clutch 18 and the line pressure oil passages 60 and 54 to communicate with each other by the engagement of the second input clutch 19. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
