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Automatic transmission-31 Power transmission manual 1 st -Gear In manual 1 st –Gear, the drive of transmission is send to the rear clutch cylinder through the input shaft. In this condition, each function unit of transmission is shown as follows: The clutch C2 is engaged through the 3-4 one-way clutch (OWC) to drive the front sun gear. The front sun gear drive the short planetary gear to rotate in anticlockwise. The short planetary gear drive the long planetary gear to rotate in clockwise. Control: In stable status, the action of solenoid valve and valve is shown as follows: The solenoid valve S1 and S2 is powered on. st -Gear. The manual-operated valve transmission fluid (line pressure ) makes the clutch C2 to engagement. st (line pressure) oil flows to the clutch C4 through the 1-2 Gear switching valve to engage the B2 brake belt. Refer to Figure 5.3 and Table 5.4. Table 5.4 The participating condition of each unit in manual 1 st -Gear Name of participated unit X X |