When the Intake Air Control Valve Closes

While the engine is running at middle speed under high load, the ECM controls the actuator to close the intake air control valve. As a result, the effective length of the intake manifold is lengthened and the intake efficiency, in the medium speed range, is improved due to the dynamic effect of the intake air, thereby increasing power output.

Intake Air Control Valve (Close)

Intake Air Control Valve (Close)

Intake Air Control Valve Close

Open

Throttle Valve

Close

Intake Air Control Valve Close

Open

Throttle Valve

Close

Engine Speed

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