Power plants – Internal combustion type free piston device supplies motive...
Patent
1975-05-15
1976-12-07
Geoghegan, Edgar W.
Power plants
Internal combustion type free piston device supplies motive...
13762521, F02B 7104
Patent
active
039954277
ABSTRACT:
A power system is disclosed for use as an automotive drive engine, utilizing combustible fuel and hydraulic drive. A multiple-phase engine, incorporating three piston units, burns fuel to provide alternating-pressure tri-phasic hydraulic energy in three lines. The engine is resonant in operation, i.e. all parts move in a rectilinear mechanically-resonant motion pattern and a constant positional phase relationship is preserved between the engine pistons by a single hydraulic mechanism.
As disclosed, the tri-phasic hydraulic energy is applied to a dynamic valve unit for conversion into a unidirectional hydraulic power stream that is applied to actuate one or more hydraulic motors. In the described embodiment, the valve unit is driven by a synchronous electrical motor which is phase varied in relation to the operating phase of the engine by a control unit that regulates the entire system for response to manual commands. The central logic or control unit receives manual command data as well as system data, e.g. data on the pressure differential across a hydraulic motor and the resonant motion amplitude of piston units. The data applied to the control unit regulates: a fuel modulator for selectively supplying fuel to the engine, a fluid bypass apparatus for absorbing energy (as during braking), and the dynamic valve for converting energy as well as supervising the flow path of energy either from the engine to the motor or from the motor to the engine. Thus, the system is controlled whereby a balance is maintained between: (1) the average energy provided discontinuously by active combustion cycles of the resonant engine and (2) the energy extracted continuously from the engine to drive one or more hydraulic motors. Accordingly, fuel flow is modulated to maintain resonant operation of the engine and supply power demands. During deceleration, the hydraulic motors function as pumps, driving the engine through the valving unit to attain and maintain fulldisplacement resonant operation. In the event additional deceleration is desired, the motor (functioning as a pump) is loaded by a hydraulic energy absorber. As disclosed, the system is illustratively embodied in an automobile.
REFERENCES:
patent: 3088413 (1963-05-01), Johnson
patent: 3295451 (1967-01-01), Smith
patent: 3365879 (1968-01-01), Panhard
Geoghegan Edgar W.
Resonance Motors, Inc.
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