| 摘要 |
<p>In a stepless transmission, primary pullies (2, 3) and secondary pullies (8, 9) are connected by a belt (14) and the pulley ratio of each pulley is subjected to hydraulic control of cylinders (5, 10) disposed on each pulley so as to change a transmission ratio. A control unit (200) generates duty control information on receiving engine control information and travel control information, and duty valves (80, 100) generate a reference pressure of each control valve (90, 110) using this duty signal in order to electrically control a transmission ratio.</p> |
