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 → Resonation Effect → Improving Intake Efficiency
2. High Speed: VIS Valve Open → Improving Intake Inertia Effect → Improving Intake Efficiency

Fig 1: Identifying Variable Intake Solenoid (VIS) Valve

Courtesy of HYUNDAI MOTOR CO.

Fig 2: Identifying VIS Valve Open And Close Position

Courtesy of HYUNDAI MOTOR CO.