Direct injected engine

Details Direct injected engine Direct injected engine

1998-02-19

1999-06-01

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Injected fuel spraying into whirling fluid

123302, 123305, F02B 2310

Patent

active

059080183

ABSTRACT:
An internal combustion engine having a direct cylinder injection and including a variable valve timing mechanism for at least changing the time of closing of the intake valve. The fuel injection timing and intake valve closing timing are controlled so that under low and mid-range engine speeds, but high loads, the intake valve is closed before the piston reaches bottom dead center position on its intake stroke so as to reduce the effective compression ratio. The engine is provided with an injector location and piston with a bowl in its head that improves fuel stratification under at least some running conditions so as to permit lean burn operation. The intake valves are offset to one side of a plane containing the axis of the cylinder bore, and the fuel injector is disposed between a pair of intake ports and below them so as to direct its injection axis toward the exhaust side and toward the recess in the head of the piston. The fuel injector is positioned in a relationship that permits a compact construction and nevertheless permits cooling of the injector. In addition, the injector sprays into the cylinder head in an area wherein the cylinder head clamping arrangement will not be compromised nor will the strength of the cylinder head.

REFERENCES:
patent: 4920937 (1990-05-01), Sasaki et al.
patent: 5115774 (1992-05-01), Nomura et al.
patent: 5233956 (1993-08-01), Ueda et al.
patent: 5259348 (1993-11-01), Kobayashi et al.

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