EXHAUST GAS RECIRCULATION (EGR) CONTROL SYSTEM

F2-125spec table

EGR system diagram shows V6 (K8-ZE) intake manifold.

DESCRIPTION

This system recirculates a small amount of exhaust gas into the intake manifold to reduce the combustion temperature, and reduce the NOx emissions.

This system consist of the EGR valve, EGR valve position sensor, two solenoid valves, engine control module (ECM), and input devices.

EGR operation is stopped to improve drivability when the engine temperature is low.

The engine control module controls the solenoid valves (vacuum side and vent side) to supply EGR gases as described below.

Operating condition	EGR operation	Remark
Idle	Stopped	Closed throttle position switch: ON
Heavy load	Stopped	Closed throttle position switch: ON
EGR valve position sensor fail	Stopped	—
High speed	Stopped	—
Acceleration	Increases EGR gas amount	Above 5500 rpm
Acceleration	Increases EGR gas amount	Coolant temperature: Between 75°C {167°F} and 80°C {176°F}
Others	Controls supplied EGR gas amount by using signal from EGR valve position sensor	Coolant temperature: Above 75°C {167°F}

Idle

EGR operationStopped

RemarkClosed throttle position switch: ON

Heavy load

EGR operationStopped

RemarkClosed throttle position switch: ON

EGR valve position sensor fail

EGR operationStopped

Remark—

High speed

EGR operationStopped

Remark—

Acceleration

EGR operationIncreases EGR gas amount

RemarkAbove 5500 rpm

Acceleration

EGR operationIncreases EGR gas amount

RemarkCoolant temperature: Between 75°C {167°F} and 80°C {176°F}

Others

EGR operationControls supplied EGR gas amount by using signal from EGR valve position sensor

RemarkCoolant temperature: Above 75°C {167°F}