Direct-injection spark-ignition engine
AssigneeNissan Motor Co., Ltd.
InventorsNobuhisa Jingu, Hiroshi Miyakubo
Life of this patent
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Abstract
A direct-injection spark-ignition engine having engine cylinders bored in a cylinder block, and a cylinder head mounted on the cylinder block, comprises at least one intake port provided for each of the engine cylinders. The ratio V/A of a stroke volume V (cm.sup.3) per cylinder to a cross-sectional area A (cm.sup.2) is set within a predetermined range defined by 45.ltoreq.V/A.ltoreq.55, where the cross-sectional area A is a minimum cross-sectional area obtained when the at least one intake port is cut by a plane extending in a direction substantially normal to a stream line of intake air flowing through the intake port.
Claims8
A direct-injection spark-ignition engine having engine cylinders bored in a cylinder block, and a cylinder head mounted on the cylinder block, comprising:
- at least one intake port provided for each of said engine cylinders,
- wherein a ratio V/A of a stroke volume V (cm.sup.3) per cylinder to a cross-sectional area A (cm.sup.2) is set within a predetermined range defined by 45.ltoreq.V/A.ltoreq.55, where the cross-sectional area A is a minimum cross-sectional area obtained when said at least one intake port is cut by a plane extending in a direction substantially normal to a stream line of intake air flowing through said at least one intake port.
Dependencies are inferred from the claim text.