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Chery·Maintenance Manual for Oriental Son
Automatic Transmission
R, UD, Second-gear and OD solenoid alve
ol valve to realize hen there is no power supply, the solenoid alve is of a normally-open type. /T-ECU controls the solenoid valve to ndertake load cycles within the range of hen the solenoid valve is at the status of %, all braking parts are engaged; when the olenoid valve is at the status of 100%, all raking parts are released. ystem circuit: ircuit operation: A/T controls the relay to rovide system voltage to each solenoid hen it is on, each solenoid valve is off; olenoid valve is on. /T-ECU determines the on/off status of ach solenoid valve according to the input ata from the parking light switch, utomobile speed sensor, input shaft sensor, utput shaft sensor and A/T oil temperature ensor, etc. /T-ECU provides grounding to turn on ach solenoid valve. The grounding time is isplayed in the form of percentage on UT-II. he actuation of a solenoid valve will affect e hydraulic pressure of the working parts nd release parts of the gearbox. ear-shifting control: olenoid valve ccording to INVECS-II, one special olenoid valve controls the hydraulic ressure of each clutch and brake so that the ystem can directly carry out “clutch-to- lutch” control during gear shifting.
Solenoid valve L 64 W G Gear LR Second gear OD DCC (reference) UD First gear Off On On Off Off Second gear On Off On On Off Third gear On On Off On Off Fourth gear On Off Off On On Reverse gear Off On On Off On
Overdrive solenoid Low/reve e Underdrive Second gear Damp clutch rs l |