System Description

Fig 1: Intake Valve Timing Control Operation Diagram

Courtesy of NISSAN NORTH AMERICA, INC.

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake-valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.