Linear engine/hydraulic pump
AssigneePneumo Corporation
InventorJack M. Brandstadter
Life of this patent
Estimating the term…
Abstract
A linear engine/hydraulic pump system provides an efficient source of controllable fluid power thay may be used for a hydrostatic drive system of a vehicle. The engine/pump has a prompt first stroke full power capability and capability of prompt power increase from a lower power operation. A supplemental engine (bounce engine) produces output work to operate the power engine of the free piston engine pump during a compression stroke of the latter. The engine is of the opposed piston type with a synchronizer and cross drive to maintain controlled interrelated operational movement of the two oppositely moving pistons thereof while combining output work effort and holding approximately constant the approximate center of mass of the engine. A novel starter also is disclosed.
Claims19
A linear engine pump, comprising pump means for pumping fluid, power engine means for producing output work to operate said pump means during a power stroke, and supplemental linear engine means for producing output work to operate said power engine means during a compression stroke of the latter, said power engine means comprising an engine cylinder, a pair of piston means movable in opposite directions in response to internal combustion for producing output work during a power stroke, work transfer means for transferring some of the work delivered to one of said piston means to the other of said piston means to move said other piston means in said cylinder in the opposite direction of movement of said one piston means, means for coupling output work directly only from said other piston means to said pump means for pumping fluid using the combined output work of said piston means transmitted to said pump means only through said other piston means, and means for coupling the remaining output work of said one piston means directly from said one piston means to said supplemental linear engine means during the power stroke of said power engine means and the compression stroke of said supplemental linear engine means, and for coupling output work from said supplemental linear engine means to said one piston means during the power stroke of said supplemental linear engine means.
Dependencies are inferred from the claim text.