Fuel injection type internal combustion engine

Patent · Tue Sep 13 04:00:00 EDT 1988

OSTI ID:6793133

Onishi, S

This patent describes an internal combustion engine comprising: an engine body having at least one cylinder bore formed therein and having an inner end wall which closes one end of the at least one cylinder bore; a piston reciprocally movable in the at least one cylinder bore and having a top face which faces the inner end wall, the top face and the inner end wall defining a combustion chamber therebetween, the top face having a cavity formed thereon and having a bottom wall; a projection formed on the bottom wall of the cavity within the cavity and having an impingement face which faces the inner end wall; a fuel injector arranged on the inner end wall and having a nozzle bore directed toward the impingement face to cause a large part of fuel injected from the nozzle bore to impinge upon the impingement face and to create a richer air-fuel mixture layer around the projection at an end of a compression stroke. The injector completing its injection of fuel before the piston reaches a top dead center position; and means for generating a spark to ignite the layer. The spark generating means being arranged on the inner end wall to come in proximity to a sidewall of the projection and in contact with the richer air-fuel mixture layer at the end of the compression stroke.

• Assignee: Nippon Clen Engine Research Institute Co., Ltd., Ishikawa
• Patent Number(s): US 4770138
• OSTI ID: 6793133
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
CYLINDERS
DESIGN
ENGINES
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
NOZZLES
PISTONS
SPARK IGNITION ENGINES