Method for pilot injection of fuel in diesel engines

Details Method for pilot injection of fuel in diesel engines Method for pilot injection of fuel in diesel engines

1980-08-25

1983-08-23

Lall, Parshotam S.

Internal-combustion engines

Combustion chamber means having fuel injection only

Injected fuel spraying into whirling fluid

123576, 123276, 123179L, 123299, F02B 306

Patent

active

043997864

ABSTRACT:
A method for the pilot injection of fuel in a direct injection diesel engine with a depression in the tops of the pistons. The pilot fuel, of relatively high cetane number, e.g. diesel fuel, is sprayed prior to the main spray, obliquely from the side into the piston depression in a direction counter to the rotation of the intake air. Thereafter, during the same combustion cycle, the main spray, of lower cetane number, e.g. methanol, is sprayed in a zone around the center axis of the piston depression. A substantial reduction in pollutants is achieved.

REFERENCES:
patent: 1543638 (1925-06-01), Burger
patent: 2269104 (1942-01-01), Hedlund
patent: 2484009 (1949-11-01), Barber
patent: 2606538 (1952-08-01), Malin
patent: 3022425 (1962-02-01), Rockstead
patent: 4080937 (1978-03-01), Wolters
patent: 4273084 (1981-06-01), Holmer
"What Can Be Gained by Pilot Injection" by P. H. Schweitzer, Automotive Industries, vol. 79, No. 18, Oct. 29, 1938.

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