BRAKE HYDRAULIC CONTROL SYSTEM Russian patent published in 1997 - IPC

FIELD: hydraulic control systems of tracked vehicle transmission. SUBSTANCE: servo spool valves arranged in housing are kinematically linked with turn and brake control members and are hydraulically connected with pressure source, return line and hydraulic cylinder of stopping brake. Servo spool valves are so positioned that they may interact with brake control member. Each spool valve is provided with plunger for axial displacement. Housings of spool valves are provided with passages for connecting the chamber between spool valve and plunger with return line or pressure source through circular bores in spool valves. EFFECT: enhanced reliability. 4 dwg