VEHICLE HYDROSTATIC TRANSMISSION Russian patent published in 1997 - IPC

FIELD: mechanical engineering; small-size tractors and other vehicles. SUBSTANCE: hydraulic accumulator is used as make-up source for vehicle hydrostatic transmission. Outlet of pump return hydraulic line and hydraulic motor line and inlet of make-up hydraulic line are connected with working space of hydraulic accumulator. Hydraulic accumulator has spring-loaded piston coupled with charge control handle. Working space of hydraulic accumulator communicates with make-up hydraulic line through additional check valve. Filter is installed in series with check valve, and free outlet is arranged in parallel. Outlet of return hydraulic lines communicates with working space of hydraulic accumulator through hole in piston. Inlet of make-up hydraulic line communicates with working space of hydraulic accumulator through hole in its bottom. EFFECT: enlarged operating capabilities. 3 cl, 1 dwg