929 V6-3.0L SOHC (1989)
EGR Valve Position Sensor: Description and Operation
Exhaust Gas Recirculation System (EGR)
The exhaust gas recirculation system introduces exhaust gas into the intake manifold to reduce NOx in the exhaust gas. It operates depending on the
engine load, engine speed, engine coolant temperature, and radiator coolant temperature. The components of the exhaust gas recirculation system are
the: distributor, air flow meter, throttle sensor, idle switch, engine coolant temperature sensor, radiator coolant temperature switch, exhaust gas
recirculation position sensor, exhaust gas recirculation control valve, EGR vacuum/EGR vent solenoid valve, and the engine control unit.
EXHAUST GAS RECIRCULATION VALVE POSITION SENSOR
The exhaust gas recirculation valve position sensor detects EGR control valve opening stroke and sends a signal to the engine control unit. The sensor
is mounted on the EGR control valve.
EXHAUST GAS RECIRCULATION CONTROL VALVE
The exhaust gas recirculation control valve recirculates a portion of the exhaust gas into the intake manifold to reduce the amount of NOx produced by
the engine. The EGR valve is equipped with a position sensor.
EGR VACUUM AND VENT SOLENOID VALVE
The EGR vent and vacuum solenoid valve controls the vacuum signal to the EGR control valve.
ENGINE CONTROL UNIT
The engine control unit detects signals from input sensors and switches and controls the EGR solenoid valves (EGR, vacuum side and vent side).
