Function And Operation Principle

Variable Intake Solenoid (VIS) Valve is installed on the intake manifold and changes the effective length of the intake passenger to improve intake efficiency under varying engine conditions.

1. Low/Middle Speed: VIS Valve Close → Resonation Effect → Improving Intake Efficiency
2. High Speed: VIS Valve Open → Improving Intake Inertia Effect →Improving Intake Efficiency
   Fig 1: Locating Variable Intake Solenoid Valve

   Courtesy of HYUNDAI MOTOR CO.
   Fig 2: Identifying Variable Intake Solenoid Valve (Open And Close)

   Courtesy of HYUNDAI MOTOR CO.