| 摘要 |
In a vehicle power transmission device provided with a crank-type continuously variable transmission, when a first clutch is engaged to connect a second input shaft with a second output shaft via a first power transmission pathway and a second clutch is engaged to connect a first input shaft with a first output shaft via a second power transmission pathway during decelerating travel of the vehicle, the driving force that is transmitted in reverse from the driving wheels is transmitted to the engine by the pathway of a forward-reverse switching mechanism → second output shaft → first power transmission pathway → second input shaft → continuously variable transmission → first output shaft → second power transmission pathway → first input shaft, and engine braking is operated. As a result, the magnitude of the engine brake braking force can be adjusted as desired and even when the vehicle speed decreases during decelerating travel, it is possible to keep the engine rotation speed constant by changing the change gear ratio of the continuously variable transmission, making it possible to expand the engine fuel cut range and reduce fuel consumption. |
