System Description

SENSOR COMMUNICATION

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed and piston position

Exhaust valve timing control

Exhaust valve timing control magnet retarder

Camshaft position sensor (PHASE)

Engine coolant temperature sensor

Engine coolant temperature

Exhaust valve timing control position sensor

Exhaust valve timing signal

Wheel sensor

Vehicle speed⁽¹⁾

⁽¹⁾	This signal is sent to the ECM through CAN Communication line

Fig 1: EVT Control Operation Diagram

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

This mechanism magnetically controls cam phases continuously with the fixed operating angle of the exhaust 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 exhaust valve timing control magnet retarder depending on driving status. This makes it possible to control the shut/open timing of the exhaust valve to increase engine torque and output in a range of high engine speed.