The Ea 837 engine has driven 200,000 kilometers. Have you changed the waste valve oil to alleviate the influence of burning oil?

The function of waste gas valve:

The function of the automobile waste gas valve is to circulate the automobile waste gas into the cylinder for re-combustion. This small amount of waste gas 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.

The engine control computer controls the solenoid valve to open timely 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 enters the cylinder to participate in combustion after mixing with mixed gas. When the engine is idling, low speed, light load and cold engine, ECU controls exhaust gas not to participate in recirculation to avoid engine performance being affected; When the engine exceeds a certain speed and load and reaches a certain temperature, ECU controls a small amount of exhaust gas to participate in recirculation, and the amount of exhaust gas involved in recirculation changes according to the engine speed, load, temperature and exhaust gas temperature, so as to achieve the lowest NOX in exhaust gas. To put it simply, a cold car won't work, but a hot car shop. Work if you need it, and don't work if you don't need it. )