| 摘要 |
Transmission system, in which a single double-effect actuator (12), used to engage/release the gears, comprises a piston (17) which is mobile with reciprocating motion, and has different areas which face first (20) and second (19) chambers of the actuator. The first and second chambers are supplied respectively, directly by a source of pressurised fluid, and by a valve (36) of the proportional type, which is interposed between the source of pressurised fluid and the actuator. <IMAGE> |
