Propulsion system for a small vehicle

Details Propulsion system for a small vehicle Propulsion system for a small vehicle

1988-07-18

1989-12-26

Look, Edward K.

Power plants

Pressure fluid source and motor

Having correlated or joint actuation of controller of input...

60443, 60487, 60489, 60494, 74572, 180165, 180307, F16D 3102

Patent

active

048889490

ABSTRACT:
The invention is vehicle propulsion system having a pump driven by an engine, a hydraulic motor driven by the pump, and a ground engaging wheel driven by the hydraulic motor. On the drive shaft connected between the engine and the pump is a flywheel whose moment of inertia is varied by radially translating weights on the flywheel. Under normal vehicle operating conditions, the weights are translated outward, whereby rotational energy is stored in the flywheel. When more power is needed then the engine can provide, the weights on the flywheel translate inwardly so that the flywheel imparts rotational energy to the pump through the drive shaft. The propulsion system has means to maintain the engine in a narrow r.p.m. range where the engine is most efficient. Vehicle speed and direction is varied by controlling the flow speed and direction from the pump, which determines the speed and direction of the hydraulic motor. The system also has an override mode wherein the engine speed is set at a new, higher level when a foot pedal operated by the vehicle operator exceeds a given range of movement.

REFERENCES:
patent: 2996135 (1961-08-01), Grabow
patent: 3369360 (1968-02-01), DeBiasi
patent: 3805676 (1974-04-01), Hamma et al.
patent: 4131171 (1978-12-01), Keyes
patent: 4445329 (1984-05-01), Drisko
patent: 4730154 (1988-03-01), Pinson

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