Description and Operation: Description

Variable Intake Manifold (VIS) Valve is installed on the intake manifold. It combines or divides the two banks' intake air passages to improve intake efficiency in accordance with the ECM control signal calculated by engine operating condition.

• Low/Middle Speed: Close VIS Valve → No Interference between LH & RH banks → Resonation Effect Maximized → Intake Efficiency Improved
• High Speed: Open VIS Valve → Intake Inertia Effect Maximized → Intake Efficiency Improved

Fig 1: Identifying Variable Intake Solenoid (VIS) Valve

Courtesy of HYUNDAI MOTOR CO.

Fig 2: Identifying Variable Intake Solenoid (VIS) Valve Positions (Open And Close)

Courtesy of HYUNDAI MOTOR CO.