WHEELED VEHICLE STEERING HYDRAULIC SYSTEM Russian patent published in 2000 - IPC

FIELD: transport engineering; steering hydraulic drives. SUBSTANCE: proposed hydraulic system has power cylinder, main pump with drive from engine, auxiliary pump with drive from transmission through normally closed hydraulically controlled clutch, distributor, hydraulic valve with OR logic function, and tank. One of inlet main lines of OR hydraulic valve is connected with main pump, and the other, with auxiliary pump. Outlet main line of normally-closed hydraulically controlled clutch is coupled with delivery main line of distributor whose drain main line is connected directly with tank, two other main lines being hydraulically coupled with spaces of power cylinder. Control main line of normally closed hydraulically controlled clutch is connected with main pump delivery main line. EFFECT: simplified design, increased reliability. 1 dwg