Internal-combustion engines – Precombustion and main combustion chambers in series – Precombustion chamber assembly inserted in spark plug hole
Patent
1981-10-22
1984-02-28
Nelli, Raymond A.
Internal-combustion engines
Precombustion and main combustion chambers in series
Precombustion chamber assembly inserted in spark plug hole
123255, 123274, 123275, F02B 306
Patent
active
044336608
ABSTRACT:
A device for supplying flash evaporated fuels directly to the combustion chamber of an internal combustion engine includes a housing that is secured to the engine adjacent the combustion chamber and a liquid fuel holding chamber within the housing that is in direct heat exchange relationship with the combustion chamber so that the liquid fuel in the chamber is superheated while the engine is operating. Liquid fuel supplied to the device is drawn into the holding chamber during each intake event of the combustion chamber and is also withdrawn from the holding chamber during the intake event. The holding chamber retains a larger volume than is normally admitted during each intake event and the fuel is further heated by passing same through a restricted passageway that is also in direct heat exchange relationship with the combustion chamber. A process for flash evaporating liquid fuel in the combustion chamber of an IC engine is also disclosed, and includes the steps of cyclically drawing liquid fuel from a pressurized fuel supply into a liquid fuel holding chamber and subjecting same to combustion chamber temperature to superheat the liquid fuel, followed by cyclically drawing a portion of the superheated fuel from the holding chamber into the combustion chamber after a first series of combustion events have occurred so that the fuel flash vaporizes in the combustion chamber during a fuel intake event. The invention also includes an adapter whereby the flash vaporization device cooperates with a precombustion chamber having a smaller volume than the combustion chamber, with an igniter for initiating combustion in the precombustion chamber in advance of the combustion chamber.
REFERENCES:
patent: Re29978 (1979-05-01), Leshner et al.
patent: 2436090 (1948-02-01), Bobine, Jr.
patent: 3710764 (1973-01-01), Jozlin
patent: 4061114 (1977-12-01), Christopher
patent: 4303045 (1981-12-01), Austin, Jr.
patent: 4361122 (1982-11-01), Latsch
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