Variable Intake Solenoid (VIS) Valve: Description

Variable Intake Solenoid (VIS) Valve is installed on the intake manifold and isolates or not the one bank from the other banks to improve the intake efficiency.

1. Low/Middle Speed: VIS Valve Close → Resonating Effect → Improving Intake Efficiency
2. High Speed: VIS Valve Open → Improving Intake Inertia Effect → Improving Intake Efficiency
   Fig 1: Identifying VIS Valve Location

   Courtesy of HYUNDAI MOTOR CO.
   Fig 2: Identifying VIS Valve Position

   Courtesy of HYUNDAI MOTOR CO.