Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Patent
1989-10-31
1990-09-11
Okonsky, David A.
Internal-combustion engines
Multiple piston, common nonrestrictive combustion chamber
Four-cycle
123 52A, 123 70R, F02B 2508
Patent
active
049553283
ABSTRACT:
A compression ignition, internal combustion engine has at least one pair of pistons operating in separate cylinders interconnected through a transfer port. Said at least one pair of pistons includes a leading piston linked to a leading crankshaft and operating in a leading cylinder, and a trailing piston linked to a trailing crankshaft and operating in a trailing cylinder. For the purpose of varying the compression ratio, the phase relation between said leading and trailing pistons is varied by means of a phase adjustment mechanism which operatively couples the leading and trailing crankshafts of the engine. The fuel is injected into the leading cylinder by means of a centrally situated multi-hole fuel injector. The clearance volume of the trailing cylinder is at a practical minimum in order to maximize the amount of air available for combustion in the leading cylinder. The combustion bowl in the leading cylinder extends over substantially the whole top surface of the leading piston so as to eliminate the stepwise changes of combustion chamber shape associated with compression ratio variation.
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patent: 3570459 (1971-03-01), Combs
patent: 3675630 (1972-07-01), Stratton
patent: 4211082 (1980-07-01), Bristol
patent: 4781155 (1988-11-01), Brucker
patent: 4860701 (1989-08-01), Jackson
Evans John C.
Okonsky David A.
Standard Oil Company
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