Combustion chamber of in-cylinder direct fuel injection engine

Details Combustion chamber of in-cylinder direct fuel injection engine Combustion chamber of in-cylinder direct fuel injection engine

1997-02-10

1999-10-05

Moulis, Thomas N.

Internal-combustion engines

Combustion chamber means having fuel injection only

Injection of fuel onto igniter, deflector, heater, or atomizer

123305, 123301, F02B 300, F02B 500

Patent

active

059607670

ABSTRACT:
A combustion chamber of an in-cylinder direct fuel injection spark ignition engine having a pentroof composed of an intake side roof and an exhaust side roof, a piston, and a cylinder. The combustion chamber has a fuel injector provided between the intake side roof and the exhaust side roof inclined toward the exhaust side port, an intake port provided on the intake port side roof at an acute angle with respect to an extended line from the exhaust side roof so as to form a tumble flow of intake air along the exhaust side roof, a piston cavity with a curved surface formed on the top surface of the piston so as to reflect a fuel spray injected from the fuel injector together with that tumble flow in the direction of the intake side roof, and an electrode of a spark plug projected from the intake side roof so as just to collide with the tumble flow. The thus constituted combustion chamber is able to establish fuel injection finishing timing over a wide range according to the fuel injection amount, when stratified charge combustion is applied.

REFERENCES:
patent: 5140958 (1992-08-01), Kobayashi et al.
patent: 5335635 (1994-08-01), Kadoi et al.
patent: 5529038 (1996-06-01), Tsuchida
patent: 5727520 (1998-03-01), Wirth et al.

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