| 摘要 |
PROBLEM TO BE SOLVED: To lessen the shock at the time of changing the speed of a vehicle, by using only a motor as a source of driving power at the time of automatic change in speed of the hybrid vehicle which has an engine that is driven by burning of fuel and the motor that is driven by electric energy. SOLUTION: In a hybrid driving device 10 which has an internal combustion engine 12, a motor 14, a single pinion-type gear 16, and an automatic speed change gear 18, driving force is transmitted from an output shaft 19 to driving wheels. The automatic speed change gear 18 is composed of a sub speed change gear 20 and a main speed change gear 22 of four forward speeds and one backward speed. The subspeed change gear 20 has a planetary gear 32, a hydraulic clutch Co, a brake Bo, and a one-directinal clutch Fo. The main speed change gear 22 has three sets of planetary gear devices 34, 36, and 38, hydraulic clutches C1 and C2, brakes B1-B4, and one-directional clutches F1 and F2. This hybrid driving device 10 has a controller for controlling automatic speed change and uses only the motor when changing the vehicle speed by the automatic speed change gear. By this method, a shock at the time of a change in speed can be lessened. |
