Patent ID: 8528711
Filing Date: 2013-09-10
Classification: F16D,F16H,Y10T

Abstract:
1. A hydraulic control system for controlling a dual clutch transmission, the hydraulic control system comprising: a source of pressurized hydraulic fluid; a first, a second, a third and a fourth pressure control solenoid in downstream fluid communication with the source of pressurized hydraulic fluid; a first flow control solenoid in downstream fluid communication with the first pressure control solenoid; a second flow control solenoid in downstream fluid communication with the second pressure control solenoid; a first clutch actuator in downstream fluid communication with the first flow control solenoid for selectively actuating a first clutch of the dual clutch transmission; a second clutch actuator in downstream fluid communication with the second flow control solenoid for selectively actuating a second clutch of the dual clutch transmission; a third flow control solenoid in downstream fluid communication with the third pressure control solenoid; a fourth flow control solenoid in downstream fluid communication with the fourth pressure control solenoid; a first logic valve assembly in downstream fluid communication with the third flow control solenoid and the third pressure control solenoid, wherein the first logic control valve assembly has a valve movable between a first and a second position; a second logic valve assembly in downstream fluid communication with the fourth flow control solenoid and the fourth pressure control solenoid, wherein the second logic control valve assembly has a valve movable between a first and a second position; a first actuator in downstream fluid communication with the first logic valve assembly, wherein the first actuator is movable between a first and second position when the valve of the first logic control valve assembly is in the first position; a second actuator in downstream fluid communication with the first logic valve assembly, wherein the second actuator is movable between a first and second position when the valve of the first logic control valve assembly is in the second position; a third actuator in downstream fluid communication with the second logic valve assembly, wherein the third actuator is movable between a first and second position when the valve of the second logic control valve assembly is in the first position; and a fourth actuator in downstream fluid communication with the second logic valve assembly, wherein the fourth actuator is movable between a first and second position when the valve of the second logic control valve assembly is in the second position, and wherein the third flow control solenoid generates a first flow of hydraulic fluid to move at least one of the first and second actuators into the first position and the third pressure control solenoid generates a first hydraulic fluid pressure to move at least one of the first and second actuators into the second position and wherein the fourth flow control solenoid generates a second flow of hydraulic fluid to move at least one of the third and fourth actuators into the first position and the fourth pressure control solenoid generates a second hydraulic fluid pressure to move at least one of the third and fourth actuators into the second position.