VEHICLE HYDRAULIC CONTROL SYSTEM OF THE TOOTHED CLUTCH OF GEARBOX Russian patent published in 2021 - IPC F16D48/06 F16H61/68 

FIELD: automatic transmissions.

SUBSTANCE: invention relates to automatic transmissions. The hydraulic control system of the toothed clutch contains a hydraulic cylinder, in the housing of which a piston with a rod is located. A fork for moving the clutch is attached to the rod. The system contains two-position solenoid valves controlled by an electronic unit, a three-position hydraulic valve, two-position auxiliary valves. The working inlet of each additional valve, when it is turned off, communicates with the output of the solenoid valve, and when the additional valve is turned on, its working inlet communicates with the pressure hydraulic line. The working outlet of each additional valve communicates with one of the cavities of the hydraulic cylinder. An annular groove is made on the piston rod, and inlet holes are made opposite the rod in the cylinder body, communicating with the distributor, and outlet holes located opposite the inlet holes. Each additional valve has two control inputs, one of which is in communication with the distributor, and the other is in communication with one of the outlets in the body of the hydraulic cylinder.

EFFECT: reliability of control of the gear clutch of the gearbox when the vehicle is moving in emergency mode is increased.

1 cl, 7 dwg