GEARBOX GEAR HYDRAULIC CONTROL Russian patent published in 2021 - IPC F16D48/06 

FIELD: vehicles transmissions.

SUBSTANCE: invention relates to transmissions of vehicles, namely, to clutches with automatic control. The hydraulic control system of the gear clutch of the gearbox (13) contains a hydraulic cylinder (1) with a piston (6), two-position solenoid valves (25, 26, 28, 30) and a three-position hydraulic valve (20). The control input of the valves (28, 30) communicates with the distributor (20). The piston rod (11) of the piston (6) has an annular groove (17). In the body (2) of the hydraulic cylinder (1), inlet holes (18, 19) and outlet holes (21, 22) are made, located opposite the inlet holes. The system also contains on-off auxiliary valves (29, 31). The control inlet of each auxiliary valve is in communication with one of the outlets in the cylinder body. The working input of the auxiliary valve, when it is turned off, communicates with the working output of the additional valve. The working output of the auxiliary valve, when it is turned off, communicates with one of the cavities of the hydraulic cylinder, and when the auxiliary valve is turned on, its output communicates with the drain.

EFFECT: control reliability is achieved.

1 cl, 7 dwg