#
EGR SYSTEM [WITH WU-TWC]

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## Outline

• An EGR valve with a stepping motor has been adopted for optimum control according to engine operation conditions.
• For control of EGR system, refer to CONTROL SYSTEM, EGR CONTROL.

## Structure

• Consists of an EGR valve and EGR pipe to conduct exhaust gas to the intake air system.
System diagram

## Operation

• The high occurrence of NOX at high temperatures has been reduced by recirculating exhaust gas to the combustion chamber in order to lower the combustion temperature.
• The exhaust gas flows along the EGR passage in the cylinder head and into the EGR valve. Exhaust gas that has flowed past the EGR valve flows through the EGR passage and EGR pipe, and is conducted to the intake manifold.