Direct-injection type spark-ignition internal combustion engine

Details Direct-injection type spark-ignition internal combustion engine Direct-injection type spark-ignition internal combustion engine

1996-09-10

1998-02-24

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means having fuel injection only

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

123301, 123305, F02B 2310

Patent

active

057202532

ABSTRACT:
A direct-injection type spark-ignition internal combustion engine comprises a fuel-injection valve whose spray hole is inclined toward a piston crown, while an uppermost line of fuel spray injected through the spray hole is set at a lower level than electrodes of the spark plug and a lowermost line of the fuel spray is in spaced relationship with a cylinder inner wall close to the spray hole. The piston crown is formed with a recessed portion and a raised flat-surface portion to define a ridge line as an intersecting line between them. The ridge line is offset from a center axis of the cylinder by a predetermined distance toward the exhaust-valve port side. Preferably, a spray angle between the uppermost and lowermost lines is set within a predetermined angle range of 70.degree..+-.20.degree..

REFERENCES:
patent: 5127379 (1992-07-01), Kobayashi et al.

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