PR25DD engine

Intake manifold runner control valve is integrated to intake manifold.

Courtesy of NISSAN NORTH AMERICA, INC.

Intake manifold runner control valve is mounted each port of the intake manifold and opened/closed by the intake manifold runner control valve motor.

ECM controls the intake manifold runner control valve motor, according to signals of engine speed, water temperature, etc. and stabilizes combustion by generating a strong tumble flow.