Nissan Versa Sedan Service ManualEngine » Engine control system (EC)
Intake valve timing control
Intake valve timing control
Intake valve timing control : System Diagram
Intake valve timing control : system description
INPUT/OUTPUT SIGNAL CHART
| Sensor | Input signal to ECM | ECM function | Actuator |
| Crankshaft position sensor (POS) | Engine speed*1 Piston position | Intake valve timing control | Intake valve timing control solenoid valve |
| Camshaft position sensor (PHASE) | |||
| Engine oil temperature sensor | Engine oil temperature | ||
| Engine coolant temperature sensor | Engine coolant temperature | ||
| Combination meter | Vehicle speed*2 |
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
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, engine oil temperature 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 highspeed range.