摘要:
This invention relates to a fluid pressure supplying method for fluidically actuating a frictional engaging apparatus in a vehicle transmission, including the steps of supplying high pressure to actuate the frictional engaging apparatus, reducing the high pressure to a lower pressure when the frictional engaging apparatus is initially engaged, and increasing the fluid pressure to line pressure in the frictional engaging apparatus after the frictional engaging apparatus is fully engaged, thereby smoothly engaging the frictional engaging apparatus without giving a shock to the apparatus and reducing the engaging time of the frictional engaging apparatus.
摘要:
A fluid pressure control system for automatic transmission includes a fluid pressure source, a fluid pressure regulating valve for regulating the fluid from the source to a particular line pressure, and a plurality of frictional engaging devices, adapted to be actuated by the line pressure through means of a manual shift valve, for attaining a particular gear ratio within the gear trains of the transmission which are interposed between the input and output shafts. A governor valve generates a governor pressure in response to the rotational speed of the input shaft, a throttle valve generates a throttle pressure in response to the engine throttle valve, and a shift valve selectively actuates the frictional engaging devices in response to the governor and throttle pressures.
摘要:
A hydraulic pressure regulating system for a vehicle having a regulator valve, a shift valve and a plurality of fluid actuated clutch means, wherein an accumulator being provided between the regulator valve and the shift valve is so designed as to control the fluid pressure to keep it relatively low when the fluid actuated clutch means is in its initial engagement condition and communicates with the regulator valve so as to increase the fluid pressure sufficiently to provide for the full engagement of the fluid actuated clutch means when the clutch means becomes substantially fully engaged.