The automobile waste gas valve rings when idling and rings after cleaning. What is the reason? Do you need to replace the exhaust valve?

The waste gas valve is damaged due to:

Quality problem

Fuel quality problems,

Improper maintenance

age

The function of automobile waste gas valve;

So as to recycle the exhaust gas.

The engine control computer ECU controls the solenoid valve to open in time according to the engine speed, load (throttle opening), temperature, intake flow and exhaust temperature. The vacuum degree of the intake pipe enters the EGR valve vacuum membrane chamber through the solenoid valve, and the diaphragm pull rod opens the EGR valve. A small amount of exhaust gas enters the intake system through EGR valve and is mixed with it.

After mixing, the gas enters the cylinder to participate in combustion. A small amount of exhaust gas enters the cylinder to participate in the combustion of mixed gas, which reduces the temperature in the cylinder during combustion. Because NOX is generated under the condition of high temperature and oxygen enrichment, the generation of NOX is suppressed, thus reducing the NOX content in exhaust gas.