| 摘要 |
PROBLEM TO BE SOLVED: To prevent the slip of a V-belt even in the input of a reverse directional torque to a V-belt type continuously variable transmission. SOLUTION: A hydraulic correction quantity calculation part 103 calculates a hydraulic correction quantity A according to vehicle speed and throttle opening. A secondary pressure correction part 106 corrects a secondary pressure calculated in a secondary pressure calculation part 101 based on the hydraulic correction value A. A pulley ratio correction part 106 corrects the hydraulic correction quantity A according to a pulley ratio calculated by a pulley ratio calculation part 104 to calculate a hydraulic correction quantity B. A primary pressure correction part 107 corrects a primary pressure calculated by a primary pressure calculation part 102 based on the hydraulic correction quantity B. The hydraulic correction of the primary pressure and secondary pressure is performed to increase the oil pressure in a vehicle state with a weak nipping pressure of V-belt, thereby, the slip of the V-belt can be prevented. COPYRIGHT: (C)2004,JPO |
