Fuel injection system for internal combustion engine

Details Fuel injection system for internal combustion engine Fuel injection system for internal combustion engine

1985-04-22

1987-04-21

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123308, 123430, 123445, 123661, F02M 5100

Patent

active

046587926

ABSTRACT:
The combustion chamber for an internal combustion engine is formed by a main combustion chamber defined by a recess formed in a part of the lower face of a cylinder head and a squish zone which is a narrow space formed between the top surface of the piston in the top dead center and the substantially flat portion of the lower surface of the cylinder head around the recess. A spark plug is disposed in a position near the squish zone. A fuel injection valve is provided to inject fuel into an intake passage communicated with the combustion chamber by way of an intake valve. The fuel injection valve is controlled, at least when the engine load is low, to inject fuel by an amount required for one power stroke and to terminate fuel injection before the middle of the intake valve opening time at latest so that stratification of air and fuel can be obtained in which rich mixture is accumulated in the lower portion of the combustion chamber and lean mixture in the upper portion of the same.

REFERENCES:
patent: 3267921 (1966-08-01), Whitehurst
patent: 4052973 (1977-10-01), Clauser
patent: 4366789 (1983-01-01), Eckert
patent: 4478190 (1984-10-01), Kawai
patent: 4543931 (1985-01-01), Hitomi et al.

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