INTERNAL COMBUSTION ENGINE - DAIHATSU MOTOR CO LTD

Title:

INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP2020165336

Kind Code:

A

Abstract:

To provide an internal combustion engine in which strong tumble flow can be created.SOLUTION: A center line of an intake port 4 is directed toward a lower portion of an exhaust port 5 at an upper portion of a cylinder bore 1. Accordingly, it can contribute to creation of tumble flow. A curtain ratio obtained by dividing an intake curtain area S by a minimum cross-sectional area E of the intake port 4 is over 2 when an intake valve 6 is lifted in maximum (preferably 3 or more). Intake air is continuously injected toward a lower region of the exhaust port 5 of the cylinder bore 1 without disturbed by a head portion 6b of the intake valve 6 since the curtain ratio is over 2 before the intake valve 6 reaches the maximum lift in an intake stroke. Accordingly, strong tumble flow can be created.SELECTED DRAWING: Figure 2

Inventors:

KUROKI YUKINORI

Application Number:

JP2019064349A

Publication Date:

October 08, 2020

Filing Date:

March 28, 2019

Export Citation:

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