Pumps – Motor driven – Internal-combustion engine
Patent
1980-05-16
1983-01-18
Smith, Leonard E.
Pumps
Motor driven
Internal-combustion engine
417393, F04B 1700
Patent
active
043690211
ABSTRACT:
A free piston engine pump system operates in response to internal combustion for pressurizing a working fluid to provide hydraulic power output. The free piston engine pump has double acting power pistons and pumping pistons fixedly attached as a main reciprocating member and movable relative to a housing, which itself may be relatively movable for mass balancing purposes. Air is supplied and exhaust products are exhausted from a pair of opposite combustion chambers by respective common intake and common exhaust valves that preferably are operated by a common actuator in direct or indirect (via a phasing valve) response to position of the main reciprocating member. Moreover, operation of fuel injectors and exhaust valves associated with respective combustion chambers is directly or indirectly (via the phasing valve) controlled in response to the position of the main reciprocating member in the housing and/or fluid pressure in respective pumping chambers. A pressure responsive cycling valve controls operation of the free piston engine pump to initiate start-up, and a cooling air control valve controls delivery of cooling air to the exhaust valves and passages during each exhaust cycle.
REFERENCES:
patent: 170008 (1875-11-01), McCormack et al.
patent: 2544605 (1951-03-01), Mallory
patent: 2564052 (1951-08-01), Chiville, Sr.
patent: 2819704 (1958-01-01), Niederman
patent: 2872778 (1959-02-01), Dane
patent: 3046958 (1962-07-01), Bard
patent: 3149773 (1964-09-01), Cudahy
patent: 3174432 (1965-03-01), Eickmann
patent: 3816031 (1974-06-01), Joyce, Sr.
patent: 3853100 (1974-12-01), Braun
patent: 4040772 (1977-08-01), Caldarelli
patent: 4087205 (1978-05-01), Heintz
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