Pumps – With condition responsive pumped fluid control – Responsive to pump created drive motor condition
Patent
1974-09-18
1976-12-07
Croyle, Carlton R.
Pumps
With condition responsive pumped fluid control
Responsive to pump created drive motor condition
417286, 417288, 417380, 417398, 417399, F04B 4900, F04B 1700
Patent
active
039959740
ABSTRACT:
This hydraulic engine utilizes two sets of hydraulic cylinders connected to a shaft so as to be alternately pressurized as the shaft is reciprocally driven by a pair of conventional internal combustion chambers. The outlets of all hydraulic cylinders are connected to a common output line via valves. During each power stroke certain of the hydraulic cylinders being pressurized are selectively disconnected (depressurized) from the output line. This effectively decreases the load on the driving chamber, and insures a relatively constant, high pressure hydraulic fluid output level despite changes in supplied force during each power stroke. The selective cylinder disconnection may be implemented programmatically in response to changes in engine parameters such as combustion chamber pressure. The engine also includes a pump for supplying input hydraulic fluid to each set of cylinders while that set is not being pressurized. The input fluid force is additive to the power supplied by the operative combustion chamber. The pump is driven by pressurized fluid from the output line, and includes a flywheel with sufficient inertia to maintain pumping, and hence continue engine operation, in the event of a misfire in one of the combustion chambers.
REFERENCES:
patent: 1741731 (1929-12-01), Nordensson
patent: 2247261 (1941-06-01), Towler et al.
patent: 2381298 (1945-08-01), McCormick
patent: 2466132 (1949-04-01), Tetreault
patent: 3329133 (1967-07-01), Panhard
patent: 3368458 (1968-02-01), Shinaver
patent: 3499387 (1970-03-01), Zippel
patent: 3682565 (1972-08-01), Yarger
Croyle Carlton R.
LaPointe G. P.
Silber Howard A.
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