Patent ID: 8234946

Claim:
A hydraulic control system for controlling a dual clutch and a plurality of synchronizers in a transmission, the hydraulic control system comprising: a source of pressurized hydraulic fluid; a first pressure control solenoid having an input and an output, wherein the input is in fluid communication with the source of pressurized hydraulic fluid; a second pressure control solenoid having an input and an output, wherein the input is in fluid communication with the source of pressurized hydraulic fluid; a first clutch solenoid having an input and an output, wherein the input is in fluid communication with the output of the first pressure control solenoid; a second clutch solenoid having an input and an output, wherein the input is in fluid communication with the output of the second pressure control solenoid; a first clutch actuator in fluid communication with the first clutch solenoid for selectively actuating the dual clutch; a second clutch actuator in fluid communication with the second clutch solenoid for selectively actuating the dual clutch; a check valve assembly having a first input in fluid communication with the output of the first pressure control solenoid, a second input in fluid communication with the output of the second pressure control solenoid, and an output; a first synchronizer solenoid having an input and an output, wherein the input is in fluid communication with the output of the check valve assembly; a second synchronizer solenoid having an input and an output, wherein the input is in fluid communication with the output of the check valve assembly; a range selection valve having an input and an output, wherein the input is in fluid communication with the output of the check valve assembly; a park servo mechanism in communication with the output of the range selection valve, the park servo mechanism operable to place the transmission in a Park mode of operation and an out-of-Park mode of operation; and a plurality of logic valves for selectively communicating pressurized hydraulic fluid from the first and second synchronizer solenoids to a plurality of synchronizer actuators in order to actuate the plurality of synchronizers.