Patent ID: 8359940
Filing Date: 2013-01-29
Classification: F16H,Y10T

Abstract:
1. A control system for a transmission, comprising: a first clutch for transmitting a driving force of an engine to a first input shaft; a first gear group placed in a first power transmission path from the first input shaft to an output shaft; a plurality of first engagement means for setting up one of first predetermined transmission gear stages by connecting one gear of the first gear group to the first input shaft or the output shaft; a plurality of first hydraulic actuators for operating the plurality of first engagement means, respectively; a second clutch for transmitting the driving force of the engine to a second input shaft; a second gear group placed in a second power transmission path from the second input shaft to the output shaft; a plurality of second engagement means for setting up one of second predetermined transmission gear stages by connecting one gear of the second gear group to the second input shaft or the output shaft; a plurality of second hydraulic actuators for operating the plurality of second engagement means, respectively; a first shift valve, operated by a first shift solenoid, for supplying a hydraulic pressure to the first clutch or one of the first hydraulic actuators, the hydraulic pressure being outputted by a first hydraulic pressure regulating device; a second shift valve, operated by a second shift solenoid, for supplying a hydraulic pressure to the second clutch or one of the second hydraulic actuators, the hydraulic pressure being outputted by a second hydraulic pressure regulating device; a third shift valve, operated by a third shift solenoid, for supplying the hydraulic pressures, which are outputted by the respective first and second shift valves, selectively to any one of the first and second hydraulic actuators; and a fourth shift valve placed between the third shift valve and the second hydraulic actuators, the fourth shift valve being operated by the first shift solenoid.