SAFARI

ENGINE

134

1. EGR Valve

2. Valve lift sensor

1. To EGR Valve

2. From ECU

3. From Vacuum pump

4. EGR Modulator

SYSTEM COMPONENTS

EGR Valve (Progressive type) :

The EGR valve is a diaphragm valve that is actuated

by vacuum from the Vacuum Pump. The valve is

mounted on the inlet manifold. It has three

connections, one for the vacuum, one for the

exhaust gas inlet from the exhaust manifold and

one for the exhaust gas outlet to the inlet manifold.

The exhaust gas starts flowing into the inlet

manifold once the vacuum is fed into the valve.

EGR Valve Lift Sensor:

This sensor is mounted on the EGR Valve which

gives EGR valve Lift information to the Electronic

Control Unit (ECU).

EGR Modulator:

The EGR-Modulator is an electro pneumatic solenoid

switch ,which is controlled more precisely by the ECU

based on the Engine speed ,Coolant Temperature and

Accelerator pedal position.

NOTE

Care should be taken to connect the ports of the

EGR-Modulator to their respective hoses. Any

interchanging of the connections will lead to

malfunctioning of the EGR system.