초록 ▼

Disclosed is a hydraulic control system of an automatic transmission used in a vehicle, which comprises a torque converter for transferring the engine power to the input shaft of the transmission, an oil pump for pumping an oil by means of the engine power, a pressure regulation means for regulating

Disclosed is a hydraulic control system of an automatic transmission used in a vehicle, which comprises a torque converter for transferring the engine power to the input shaft of the transmission, an oil pump for pumping an oil by means of the engine power, a pressure regulation means for regulating the line pressure produced by the oil pump according to the forward and reverse drive and the amount of a throttle opening, a damper clutch working control means for changing the direction of the pressure delivered to the torque converter in order to increase the power transfer rate of the torque converter, a shift pressure control means for delivering the pressure supplied from the pressure regulation means to the first, second, third, fourth, fifth, sixth and seventh solenoid valves controlled on/off by a transmission control unit to adjust the control pressure during shifting operation, and a pressure distribution means for selectively distributing the pressure supplied from the pressure control means during shifting among the friction elements according to the shifting stages.

대표청구항 ▼

A hydraulic control system of an automatic transmission used in a vehicle, comprising: a torque converter for transferring the engine power to the input shaft of said transmission; an oil pump for pumping an oil by means of said engine power; a pressure regulation means for regulating the line press

A hydraulic control system of an automatic transmission used in a vehicle, comprising: a torque converter for transferring the engine power to the input shaft of said transmission; an oil pump for pumping an oil by means of said engine power; a pressure regulation means for regulating the line pressure produced by said oil pump according to the forward and reverse drive and the amount of a throttle opening; a damper clutch working control means for changing the direction of the pressure delivered to said torque converter in order to increase the power transfer rate of said torque converter; a shift pressure control means for delivering the pressure supplied from said pressure regulation means to the first, second, third, fourth, fifth, sixth and seventh solenoid valves controlled on/off by a transmission control unit to adjust the control pressure during shifting operation; and a pressure distribution means for selectively distributing the pressure supplied from said pressure control means during shifting among the friction elements according to the shifting stages.