Direct injection diesel engine with a mechanically controlled in

Details Direct injection diesel engine with a mechanically controlled in Direct injection diesel engine with a mechanically controlled in

1982-03-29

1984-01-31

Nelli, Raymond A.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having combustible mixture forming means

123260, 123261, F02B 2306

Patent

active

044283407

ABSTRACT:
In a diesel engine having one inlet valve and one exhaust valve, with an inlet passage having a spiral profile to create rotary air turbulence in a combustion chamber of at least 1.5 times the engine speed, an injector pump, driven by an engine camshaft, supplies high pressure fuel to a fuel injector mounted in the cylinder head, which injects the fuel into the combustion chamber. The injector, which includes a nozzle tip having 4 to 6 jets, is inclined from the axis of the cylinder bore at an angle i of equal to or less than 30 degrees. The injector is also eccentrically mounted from the axis of the cylinder bore at an eccentricity value e that is less than or equal to 0.2 times the bore of the cylinder D. Also, the depth H of the combustion chamber to outer diameter d of the combustion chamber is related by the ratio H/d which is greater than 0.2 but less than 0.5. The centerline of the axis of the combustion chamber is mounted at a distance I from the axis of the cylinder bore in a relationship to the diameter of the bore D by a parimeter I/D which is of equal to or less than 0.1. Adhering to the above design parameters reduces the fuel consumption in small diesel engines with one inlet valve and one exhaust valve.

REFERENCES:
patent: 3094974 (1963-06-01), Barber
patent: 3125079 (1964-03-01), Hoffman
patent: 3908624 (1975-09-01), Miyaka et al.
patent: 3954089 (1976-05-01), Hardesty et al.
patent: 4127089 (1978-11-01), Tsutsumi
patent: 4177769 (1979-12-01), Okada et al.

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