DEVICE TO CONTROL FRICTION CLUTCH OF DRIVE OF PUMPING UNIT OF HYDRAULICALLY POWERED VEHICLE HYDROSTATIC TRANSMISSION Russian patent published in 2006 - IPC B60K17/10 

FIELD: transport engineering.

SUBSTANCE: device to control friction clutch of drive of pumping unit consisting of main and make-up pumps has spring-loaded lever to move spring-loaded pressure plate of clutch from friction plate, hydraulic cylinder to turn lever for closing clutch disks by means of springs interacting with pressure plate, vessel with liquid communicating with hydraulic cylinder, valve to communicate air space of vessel with compressed air source. Valve electric control circuit includes switches operated by compressed air source pressure sensor, sensors of pressure built by make-up pump and additional pump driven from engine shaft, maximum temperature sensor and working liquid minimum level sensor in hydraulic tank.

EFFECT: provision of convenient control of friction clutch with monitoring condition of hydrostatic transmission to prevent emergency situations by switching off pumping unit drive.

2 cl, 1 dwg