Patent ID: 7896775
Filing Date: 2011-03-01
Classification: F16H,Y10T

Abstract:
1. A shift control system for a dual clutch transmission having a first mode of operation and a second mode of operation, the shift control system comprising: a controller for providing a first control signal and a second control signal; a first solenoid in communication with the controller and having a first port for receiving a first fluid flow and a second port in communication with the first port for selectively receiving the first fluid flow; a second solenoid in communication with the controller and having a first port for receiving a second fluid flow and a second port in communication with the first port for selectively receiving the second fluid flow; and a valve assembly having a valve movably disposed within a valve body, the valve body having a first inlet port in communication with the second port of the first solenoid, a second inlet port in communication with second port of the second solenoid, a third inlet port for receiving a third fluid flow, a first outlet port in communication with the third inlet port for selectively receiving the third fluid flow, and a second outlet port in communication with the third inlet port for selectively receiving the third fluid flow; wherein the first control signal activates the first solenoid to open such that the second port of the first solenoid receives the first fluid flow and communicates the first fluid flow to the first inlet port of the valve assembly wherein the first fluid flow moves the valve to a first position, and wherein the second control signal activates the second solenoid to open such that the second port of the second solenoid receives the second fluid flow and communicates the second fluid flow to the second inlet port of the valve assembly wherein the second fluid flow moves the valve to a second position; and wherein the first position of the valve directs the third fluid flow to the first outlet port to shift the transmission to the first mode of operation, wherein the second position of the valve directs the third fluid flow to the second outlet port to shift the transmission to the second mode of operation, and wherein the first mode of operation is an out-of-Park mode and the second mode of operation is a Park mode.