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a Study on the In-Cylinder Swirl Flow Characteristics With Intake Port Eccentricity in a 4-Valve Diesel Engine
Technical Paper
963828
Sector:
Event:
KSAE Spring Conference
Language:
Korean
Abstract
The effect of intake port eccentricity on the characteristics of
in-cylinder swirl flow in a 4-valve diesel engine having two intake
ports; one is helical port, and the other is tangential port was
investigated by steady flow test using the ISM (impulse swirl
meter). The swirl ratio (Rs) and mean flow coefficient
(Cf(mean)) with valve lifts and intake port
eccentricity were measured.
The characteristics of in-cylinder swirl flow formed by a 4-
valve cylinder head were largely affected by a helical intake port.
Swirl ratio (Rs) increases linearly as the intake ports close to
the cylinder wall in negative Y direction from positive Y
direction. In the comparison of the swirl ratio distribution,
4-valve cylinder head used in this experiment shows the same trend
as the helical intake port.