Cylinder direct injection spark-ignition engine

Details Cylinder direct injection spark-ignition engine Cylinder direct injection spark-ignition engine

1998-05-12

1999-12-28

Wolfe, Willis R.

Internal-combustion engines

Combustion chamber means having fuel injection only

Air entering combustion chamber through plural inlets

123308, F02B 1700

Patent

active

060067195

ABSTRACT:
A cylinder direct injection spark-ignition engine comprises a cylinder block having cylinders. A cylinder head is fixedly mounted on a block deck of the cylinder block and has first and second intake ports for each cylinder. A fuel injector valve directly injects fuel into a combustion chamber corresponding to each cylinder. A spark plug has a tip end section projecting into the combustion chamber. A piston defines the combustion chamber between it and the cylinder head. The piston has, at its piston crown, a generally circular cavity having a center axis offset from a center axis of the piston toward the intake valves. A swirl control valve controls air flow in the first intake port in accordance with an engine operating condition. The second intake port has an axis whose at least a major part is contained in a first vertical plane which inclines relative to a second vertical plane to form a first predetermined angle, the first vertical plane gradually approaching the center axis of the piston in a direction toward the combustion chamber relative to the vertical cross flow plane. The first and second vertical planes are vertical to the block deck. The second vertical plane passes through the first intake and exhaust valves and is perpendicular to a third vertical plane containing the center axes of the cylinders and vertical to the block deck. The first intake and exhaust valves are located on opposite sides of the third vertical plane.

REFERENCES:
patent: 5335634 (1994-08-01), Hashimoto et al.
patent: 5394845 (1995-03-01), Noh et al.
patent: 5553588 (1996-09-01), Gono et al.

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