Mechanical power regeneration system

Details Mechanical power regeneration system Mechanical power regeneration system

F - Mech Eng,Light,Heat,Weapons

16

D

180/0.1

F16D 31/02 (2006.01)

Patent

CA 1285887

MECHANICAL POWER REGENERATION SYSTEM ABSTRACT OF THE DISCLOSURE A mechanical power regeneration system for a road vehicle has a sole variable displacement hydraulic pump in the transmission system, the sole hydraulic pump being driven by the rear wheels of the vehicle and thus may be positive- ly driven by the drive axle of the vehicle, whilst a first check valve is connected between the output side of the pump and a first hydraulic line to a high pressure accumulator unit, a second hydraulic line to a low pressure accumulator unit, a second check valve is connected between the second hydraulic line and the input side of the pump, a first con- trolled valve is connected between the first hydraulic line and the input side of the pump and a second controlled valve is connected between the second hydraulic line and the output side of the pump. In operation, when the brakes of the vehicle are applied to place it in a braking mode the first and second controlled valves are controlled by a controller unit to be closed and hydraulic fluid is transferred by the pump from the low pressure accumulator to the high pressure accumulator through the second check valve and the first check valve. When the vehicle is placed in a drive mode and requires a positive traction force, the controller unit controls the first and second controlled valves to open and stored hydrau- lic energy in the high pressure accumulator is transferred by means of fuel flow through the first controlled valve to the input side of the pump to apply a positive traction force to the rear wheels, the return path of the fluid leaving the pump being from its output side through the second controlled valve to the low pressure accumulator unit. The invention may be used with movable objects other than road vehicles For example, the invention may be applied to elevators or other lifts.

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