Hyundai Elantra AD Quiz
Engine Control System/Fuel System

Description and Operation of Variable Intake Solenoid (VIS)

In this manual: Engine Control System/Fuel System
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
~1min read

Description

The Variable Intake Solenoid (VIS) is installed on the intake manifold. The VIS controls the vacuum modulator, which actuates the valve in the intake manifold. The ECM opens or closes this valve depending on engine conditions (refer to the table below).
Engine Status VIS Valve Operation
Average Speed Closed Improves engine performance at low engine speeds by reducing intake interference between cylinders.
Low/High Speed Open Minimizes intake resistance by shortening the intake manifold length and increasing the air inlet area.

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