| 摘要 |
<p>1,157,849. Clutches. SOC. ANON. FRANCAUSE DU FERODO. 2 June, 1967 [3 June, 1966], No. 25657/67. Heading F2C. In a vehicle transmission including an hydraulic torque converter or coupling with a lock-up clutch of which the driving plates form an hydraulic piston-cylinder unit, the operating liquid for the system is passed through a cooler when the clutch is engaged, but not when the clutch is disengaged. The arrangement shown includes a three-element torque converter 16 and a disc clutch 14 whose friction plate 32 is engaged between the cylinder and piston driving plates 26, 28, the latter being engaged by a Belleville spring 29. Spaces 37, 38 between plates 26, 28 are connected by openings 39 in plate 32, and liquid may pass from the converter working circuit 40 into space 38 through non-return valves 43 in plate 28. A supply pump 53 is driven by the converter impeller 18, a valve 49 responsive to gear changes controlling the flow through inlet and exhaust passages 44, 48. If a gear is engaged or the gear lever is not in neutral, valve 49 is in the position shown and the lockup clutch is engaged, high pressure liquid in the converter working circuit 40 passing through the non-return valves 43 into clutch space 38 and through passages 48, 50 into a valve chamber 86, from which it passes through a cooler 157 to a sump 56. If a gear is selected or the gear lever is in neutral the valve 49 is moved to the right to cut off the supply liquid from valve chamber 86 and the cooler 157, and valves 43 are closed so that pressure in clutch spaces 37, 38 is higher than in the converter working circuit and the clutch is disengaged.</p> |
