SAFARI

110

ENGINE2.2LDICOR

EGRpipe

This pipe connects the exhaust manifold to the EGR

valve. Through this pipe Exhaust gas is routed to the

intake manifold and mixes with the fresh air.

ECU

The EGR system of the vehicle is controlled more

precisely based on environmental conditions such as

atmospheric pressure, air temperature, engine

conditions (engine speed, pedal position, coolant

temperature etc).The ECU is mounted inside the

engine compartment.

NOTE

Ensure that exhaust systemand catalytic converter

are not blocked and are free from obstruction.

Blockages in the exhaust can create back pressure,

low top speed, poor pick up, black smoke, carbon

build up and low mileage.

Check and ensure EGRValve &Control System is

Clean and functioning properly.

Damaged or pinched vacuum lines / wrong

connections of vacuum pipes.

EGR-EVRV, Turbocharger-EVRV aresame. Ensure

that correct connections can made on both of

these EVRVs. Interchanging these connection can

keep the 'EGR' open when not desired and vice

versa. Either way these can seriously affect power

output of the engine and also the emission levels.

Electronic VacuumRegulating Valve (EVRV)

(Fig.

225)

The EVRV 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 etc. EVRV provides variable

vaccum levels to drive EGR&VNT.

NOTE

Care should be taken to connect the ports of the EVRV

to their respective hoses. Any interchanging of the

connections will lead to malfunctioning of the EGR

system.

EGRSYSTEMCOMPONENTS

EGRValve

(Fig. 224)

The EGR valve is a diaphragmvalve that is actuated by

vacuum from the Vacuum Pump through EVRV.The

valve is fitted to EGR cooler which 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.

Fig. 224

Fig. 225