HYDRAULIC CONTROL SYSTEM OF THE TWO-WAY GEAR COUPLING OF THE TRANSMISSION Russian patent published in 2021 - IPC F16D48/06 F16H61/68 F15B15/02 

FIELD: vehicles.

SUBSTANCE: invention relates to hydraulic control systems of the two-way gear coupling of a vehicle. The system comprises a hydraulic cylinder with a piston and a rod, two-position electromagnetic valves controlled by an electronic unit, a three-position hydraulic distributor, a two-position additional valve, and a two-position auxiliary valve. A gear coupling moving fork is fixed on the rod. The working input of the additional valve upon deactivation communicates with the output of the electromagnetic valve, and upon activation communicates with the pumping main. The working output of the additional valve communicates with the cavity of the hydraulic cylinder. An annular groove is made on the piston rod, and made in the body of the hydraulic cylinder are an inlet communicating with the distributor through a valve with the OR function and an outlet. The control input of the auxiliary valve is in communication with the outlet in the body of the hydraulic cylinder, and the working input is in communication with the distributor through the valve with the OR function. The working output of the auxiliary valve upon deactivation brings the control input of the additional valve into communication with the distributor through the valve with the OR function, and upon activation, brings the control input of the valve into communication with the drain outlet.

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

1 cl, 6 dwg