HYDRAULIC CONTROL SYSTEM OF THE 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 gear coupling of the transmission. 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 control input of the additional valve communicates with the distributor through a valve with the "OR" function. 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. An annular groove is made on the piston rod, made in the body of the hydraulic cylinder are an inlet communicating with the distributor through the valve with the "OR" function and an outlet. The control inlet of the auxiliary valve is in communication with the outlet. The working inlet of the auxiliary valve upon deactivation communicates with the working outlet of the additional valve, and the working outlet - with the cavity of the hydraulic cylinder, and the working outlet thereof upon activation communicates with the drainage 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