Egr Valve Diagram

The exhaust gas recirculation valve within your vehicle is a crucial component in reducing harmful emissions and ensuring your vehicle runs smoothly. The egr flow is at its peak during steady cruising under moderate load. Egr valve exhaust gas recirculation valve what should you know the egr valve is designed to cool exhaust gas.

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Egr System Diagram Exhaust Gas Recirculation Automotive

By burning exhaust for a second time within the intake system.

Egr valve diagram. The vehicle computer operates the valve instead of previous years egr valves which are operated by the engine vacuum. Electronic egr valves are used in vehicles dated 1990 and up. Consequently this results in the reduction of nitrogen oxide emissions. Egr valve code po401.

There is no egr flow when the engine is cold at idle or during hard acceleration. The warmth of the exhaust lets the combustion chambers warm up quickly while the spent inert gases keep the chambers from getting too hot when the engine fully warms up. In some cars the egr valve is operated by a vacuum actuator as in the first diagram. The egr valve connects the exhaust manifold to the intake manifold.

Recirculation of the exhaust leads to a gradual accumulation of carbon particles inside the. The egr valve is normally closed. Learning how to test an egr valve will save you time money and some headaches. After miles of service the exhaust gas recirculation egr system especially the egr valve will lead to engine performance problems due to carbon buildup components mechanical problems or vacuum hose leaks.

1984 chevy gmc vacuum diagram routing solved. Since the 1960s vehicle manufacturers have installed exhaust gas recirculation egr valves to reduce nitrous oxide nox emissions. The exhaust gas re circulation egr system is designed to reintroduce exhaust gas into the combustion chambers thereby lowering combustion temperatures and reducing the formation of oxides of nitrogen nox. Air cleaner temp sensor vac motor manifold vacuum source egr valve egr bleed solenoid distributor delay valve pcv valve.

The egr valve recirculates a small amount of exhaust into the combustion cycle.