ALL-WHEEL DRIVE TRUCK Russian patent published in 2013 - IPC B60K17/346 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Vehicle comprises truck body, strain gage transducer 40 responding to cargo at said body, transmission incorporating gearbox with clutch and transfer box with master differential. Said master differential comprises three planetary gear sets switched by toothed coupling 27. Toothed coupling 27 is hydraulically driven by piston 28 arranged in three-section working chamber 29 accommodating said piston 28 and larger-diameter piston 30 that makes a thrust for piston 28. Working chamber front section located ahead of piston 28 and medium section located between pistons are communicated via hydraulic lines with two-position hydraulic control valve 33. Rear section is communicated via hydraulic line 35 and valve 36 with working chamber front section. Hydraulic control valve 33 is controlled by electromagnet 37 connected to transducer 40 via threshold element 39. Hydraulic control valve 36 is controlled by electromagnet 41 connected to transducer 40 via threshold element 43.

EFFECT: better controllability and flotation.

2 cl, 4 dwg