| 摘要 |
PURPOSE:To stop the supply of lubricating oil to an oil hydraulic clutch and reduce its shift load, by actuating an oil supply stopping device when a vehicle is driven at a predetermined car speed or less. CONSTITUTION:An oil hydraulic clutch 19 is connected in such a manner that pressurized oil supplied from an oil reservoir 25 in a speed changer case to a supply oil path L1 through an oil hydraulic pump 27 is supplied through a regulator valve 28 and a selector valve 29 to a clutch oil path L2 connected to a piston chamber 19a. The selector valve 29 connects the supply oil path L1 to the clutch oil path L2 by inputting the pressure of oil through a pilot passage L3. An atmospheric air leak valve 30 controls the oil hydraulic clutch 19 to be connected and disconnected in accordance with the running condition of a vehicle. An oil supply stopping device 38, in which an atmospheric air leak valve 39 of solenoid type provided in a lubricating oil passage L4 is opened when the vehicle is driven at a predetermined car speed or less, is operated so as to stop the supply of lubricating oil through the lubricating oil passage L4. |
