Diesel engine

Details Diesel engine Diesel engine

1991-06-24

1992-04-14

Nelli, Raymond A.

Internal-combustion engines

Precombustion and main combustion chambers in series

With injection means particularly positioned relative to...

123256, 123276, F02B 1900

Patent

active

051037769

ABSTRACT:
The diesel engine includes a first combustion chamber defined by a recess in a piston top and a projection formed in the first combustion chamber. The projection stands on a bottom wall of the first combustion chamber. A second combustion chamber is formed inside the projection. A fuel introduction opening is formed at a top of the projection to allow fuel to come into the second combustion chamber and combustion gas exit openings are formed in a side of the projection to allow gases produced upon combustion in the second combustion chamber to go out of the second combustion chamber and enter the first combustion chamber. A fuel injection nozzle injects fuel into the first combustion chamber before the top dead center of the piston. Swirl and squish are produced in the first combustion chamber and make turbulence of fuel and air in the first combustion chamber. Before the swirl and squish are attenuated, the injection nozzle also spouts the fuel into the second combustion chamber to cause another combustion in the second combustion chamber. Gases produced upon the combustion in the second combustion chamber enter the first combustion chamber to help and maintain the turbulence in the first combustion chamber. Therefore, the turbulence is maintained throughout the combustion process in the first combustion chamber.

REFERENCES:
patent: 2991768 (1961-07-01), Witzky
patent: 3703886 (1972-11-01), Witzky
patent: 4128092 (1978-12-01), Yokota et al.
patent: 4161927 (1979-07-01), Yagi et al.
patent: 4175531 (1979-11-01), Tanahashi
patent: 4175533 (1979-11-01), Goto et al.
patent: 4686941 (1987-08-01), Ariga
patent: 4742805 (1988-05-01), Matsushita et al.
patent: 4744341 (1988-05-01), Harayama et al.

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