Internal-combustion engines – Precombustion and main combustion chambers in series – Having fluid whirling means
Patent
1997-02-06
1998-03-17
Wolfe, Willis R.
Internal-combustion engines
Precombustion and main combustion chambers in series
Having fluid whirling means
123299, F02B 1900
Patent
active
057275190
ABSTRACT:
A diesel engine using a low evaporativity fuel, and improves the fluidity of the air and fuel by injecting the fuel into a cylinder at the beginning of a compression stroke forming a uniform gaseous mixture, whereby the generation of NO.sub.x is minimized. A swirl chamber is formed in a piston, and a primary chamber by a combustion chamber structure provided in a cavity of a cylinder head. A fuel injection nozzle injects a low evaporativity fuel, such as heavy oil, into the cylinder at the beginning of a compression stroke, disperses the fuel into an air swirl in the cylinder, forms a uniform gaseous mixture of the fuel and air therein, and ignites and burns with the assistance of a glow plug the gaseous mixture entering the swirl chamber through communication ports at the end of the compression stroke. In another embodiment, the piston is provided with a plurality of radially arranged communication ports and a downwardly convergent fuel injection port, and a fuel injection nozzle injects a low evaporativity fuel into a cylinder at the beginning of a compression stroke, disperses the fuel into an air swirl in the cylinder, forms a uniform gaseous mixture of the fuel and air in the cylinder, and ignites and burns the gaseous mixture in the swirl chamber by reliably supplying an ignition fuel thereto through the fuel injection port at the terminal end of the compression stroke.
REFERENCES:
patent: 2692587 (1954-10-01), Barber
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patent: 5081970 (1992-01-01), Matsuoka
patent: 5425337 (1995-06-01), Matsuoka
patent: 5483933 (1996-01-01), Kawamura
patent: 5515823 (1996-05-01), Kawamura
Isuzu Ceramics Research Institute Co. Ltd.
Vo Hieu T.
Wolfe Willis R.
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