VEHICLE DRIVE Russian patent published in 1997 - IPC

FIELD: transport engineering; vehicle drives. SUBSTANCE: device has drive engine 1 and hydrostatic-and-mechanical gearbox 2 with power distribution to drive wheels 3 kinematically coupled with differential 4. Gearbox 2 has planetary differential 3 as mechanical part and at least two hydraulic machines H1 and H2 as hydrostatic part. Hydraulic machines are connected by hydraulic lines 5 and 6 to control operation of reversing unit U. Lines 5 and 6 are connected through at least one line 7 with built-in pressure limiting valve D. EFFECT: improved reliability of operation. 2 cl, 3 dwg