In-cylinder direct-injection spark-ignition engine

Details In-cylinder direct-injection spark-ignition engine In-cylinder direct-injection spark-ignition engine

1999-01-07

2000-10-31

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123301, 123302, 123305, F02B 108, F02B 1700

Patent

active

061386391

ABSTRACT:
A direct-injection spark-ignition engine operable between a stratified charge combustion mode where fuel injection is executed on a compression stroke while introducing a vertical-vortex tumble flow to an induced air drawn into a combustion chamber through an intake port, and a homogeneous combustion mode where fuel-injection early in the intake stroke produces a homogeneous air-fuel mixture, comprises a cylinder block having a cylinder, a piston movable through a stroke in the cylinder and having a centrally-formed piston bowl cavity combustion chamber in its piston head, a cylinder head mounted on the cylinder block, a centrally-located spark plug, and a fuel injector valve provided nearby the intake valve for injecting fuel directly into the combustion chamber. The piston bowl cavity combustion chamber is formed, so that the deepest portion of the piston bowl cavity combustion chamber is obtained at the center of the piston head, and the inner peripheral concave wall surface of the cavity combustion chamber is contoured to be curved in a direction of a streamline of the vertical-vortex tumble flow.

REFERENCES:
patent: 3452726 (1969-07-01), Szymanski
patent: 4811708 (1989-03-01), Gruden
patent: 5740777 (1998-04-01), Yamamoto et al.
patent: 5806482 (1998-09-01), Igarashi et al.
patent: 5816215 (1998-10-01), Yoshikawa et al.
patent: 5960767 (1999-10-01), Akimoto et al.
Patent Abstracts of Japan, vol. 018, No. 491 (M-1672), Sep. 13, 1994, abstract of JP 06 159079 (Fuji Heavy Ind. Ltd.), Jun. 7, 1994.

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