ENERGY-SAVING VEHICLE Russian patent published in 2002 - IPC

FIELD: transport engineering. SUBSTANCE: vehicle has engine, hydrostatic transmission including hydraulic pump, tank, distributor, hydraulic accumulators, pipelines and wheel hydraulic motors. According to invention, each hydraulic motor has two rotors one of which is inner one, being furnished with blades pointed outwards, and the other is outer one, being provided with blades pointed inwards, and two roller couplings whose inner races are formed by outer rotor and disks of inner rotor. Outer sprocket of one of couplings is connected with wheel. Other outer sprocket provides rotation of both rotors in one direction with inner rotor resting on bearings of fixed axle- shaft provided with channels to deliver working liquid to ball-type inlet spools arranged in blades of inner rotor, and working liquid outlet channel from differential outlet spools arranged in the same blades. Each outlet spool has spool bushing with two seats, balls and spring in between. Said axle-shaft has channels to remove working liquids from spaces at different sides of inner rotor blades. Pushers for interaction with balls of inlet spools are installed on blades of outer of outer rotor. Hydraulic motor has reversing system including plungers connected by tie-rods with separators which are connected by spring with outer sprockets of said couplings and also control system including meter, check valve and pressure feed unions. EFFECT: reduced overall dimensions, mass and energy consumption. 4 dwg