| 摘要 |
PURPOSE:To realize a widely ranged stepless transmission by obtaining a working signal for feeding and controlling a velocity ratio control servo-mechanism therewith which responding to a signal which is generated corresponding to a vehicle velocity and another signal which is generated corresopnding to a throttle opening. CONSTITUTION:A main pump 102 constitute an oil pressure source for a hydraulic system being driven by an output shaft 101 of an engine E. And then an auto-start clutch 103, spherical transmission velocity ratio change mechanism 104 and a forward/backward run switch-over mechanism 108 are arranged being connected to the output shaft 101 of the engine in this order. A governor valve 170 is arranged to the fore of the forward/backward run switch-over mechanism 108 in the side of the output shaft of the velocity ratio change mechanism 104. A velocity ratio control servo mechanism 220 responds to the signal which responds to a velocity of the vehicle and to another signal which responds to the throttlle opening. |
