System Description

SYSTEM DIAGRAM

Courtesy of NISSAN

Component parts	Function
Crankshaft position sensor 1	Crankshaft Position Sensor 1
Intake camshaft position sensor	Intake Camshaft Position Sensor
Engine oil temperature sensor	Engine Coolant Temperature Sensor
ECM	ECM (With Barometric Pressure Sensor)
Electric intake valve timing control module	Electric Intake Valve Timing Control Module
Electric intake valve timing control actuator	Electric Intake Valve Timing Control Actuator

SYSTEM DESCRIPTION

This engine uses an electric VTC. The electric VTC responds faster than hydraulic VTC and allows operating under low engine speed condition. This improves the fuel economy, engine output, and exhaust performance. This mechanism continuously controls the phase of camshaft by the electric intake valve timing (IVT) control actuator with the amount of intake valve operation held constant. ECM transmits a crankshaft position signal and an intake camshaft position signal to the electric IVT control module and transmits target values of electric IVT control actuator via engine communication (CAN). The electric IVT control module controls the electric IVT control actuator according to a signal from ECM and changes the opening and closing timing of intake valve. Furthermore, the electric IVT control actuator has a diagnostic function and transmits a DTC detection signal to ECM via engine communication when detecting a system error.

Status of electric intake valve timing control actuator	Electric intake valve timing control actuator activation
Advanced angle	Electric IVT control motor rotates faster than camshaft. This allows the camshaft position (cam phase) against camshaft sprocket to move toward the advanced angle.
Maintained	Electric IVT control motor and camshaft rotate at the same speed.
Retard angle	Electric IVT control motor rotates slower than camshaft. This allows the camshaft position (cam phase) against camshaft sprocket to move toward the retard angle.