Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Patent
1990-11-09
1991-10-08
Miller, Carl Stuart
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
123506, F02B 300
Patent
active
050544454
ABSTRACT:
The invention relates to a fuel injection system for self-ignition internal combustion engines. The noise reduction of Diesel engines requires new injection systems. According to the invention a pre-injection and a main injection is achieved by employing to injection lines of different lengths. The difference in length is selected such that the time difference of the pressure waves for travelling the respective lengths corresponds to the desired time delay between the pre-injection and the main injection. In order to account for the compressibility of the fuel both injection lines are maintained at a standing pressure. The hydraulic effect of the injection lines on each other is prevented by check valves and by-pass valves. The controlled injection significantly reduces the combustion noise.
REFERENCES:
patent: 3216407 (1965-11-01), Eyzat
patent: 4201160 (1980-05-01), Fenne
patent: 4289098 (1981-09-01), Norberg
patent: 4392466 (1983-07-01), Mowbray
patent: 4708116 (1987-11-01), Gaa
patent: 4711209 (1987-12-01), Henkel
Garbisch Max
Henkel Dietmar
MAN Nutzfahrzeuge AG
Miller Carl Stuart
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