Valve Timing Control Solenoid

Oil pressure, applied through valve timing control solenoid, is used to adjust camshaft pulley position. At idle or high speed, valve timing control solenoid is off, valve timing is retarded and valve overlap is decreased. At low-to-medium speed, valve timing control solenoid is on, valve timing is advanced and valve overlap is increased. This results in increased torque at lower engine RPM.

Fig 1: Valve Timing Control System Component ID (1.6L)

Courtesy of NISSAN MOTOR CO., U.S.A.