How can Audi a4l tell that the turbine pressure reducing valve is broken?

1. Due to the unresolved problems of the engine itself, such as adhesion of the throttle, unqualified air filter, blockage or direct puncture of the three-way catalyst, the fuel consumption is high, which is often considered as the problem of the supercharger.

In general, the pressure at the pressure end of the supercharger is basically balanced with its own oil pressure. Coupled with the sealing function of the sealing system, the oil will not leak from the supercharger, and it will only leak slightly when idling for a long time, so the idling time should generally not exceed 10 minute.

The seal of the new supercharger is generally not damaged, and the oil leakage at the pressure end is mostly due to unqualified filter element or inappropriate model. There are many filter elements in the market that are not suitable for supercharged engines.

Low ventilation rate of the filter element, air leakage in the air intake system or poor adhesion of the throttle valve, resulting in internal and external pressure imbalance, and pressurized air lubricating oil is sucked back into the air intake for combustion.

Because the gas ratio is wrong, engine oil is inhaled, combustion is not good, and the engine emits white smoke or black smoke.

2. Excessive engine oil can easily enter the air intake system from the crankcase, thus causing the engine oil to emit black smoke or blue smoke.

3. The engine itself burns engine oil, because the supercharged engine has sufficient gas supply, so the combustion is relatively full, and there is no smoke at the tail of the engine, and the engine oil is also burning.

4. The bypass valve is stuck or the adjusting nut is adjusted by non-professionals, which leads to the leakage of compressed air, thus reducing its compression efficiency. At this time, the engine is weak, acceleration is difficult or black smoke is emitted.

5. The pressure between the supercharger and the three-way catalyst should be basically balanced.

Coupled with the role of the sealing system, the vortex end of the new supercharger generally does not leak oil. The following conditions may lead to oil leakage: oil leakage in the exhaust system; The three-way catalytic converter is unqualified; The three-way catalytic converter is directly broken. These conditions lead to too low exhaust pressure, unbalanced oil and gas pressure, oil seeping into exhaust gas for combustion or white smoke.

6. When the air leakage of the engine valve is serious, it is difficult to boost the supercharger, which is easy to cause the supercharger to shake and engine noise, and sometimes it will cause the supercharger to trip.

7. The supercharger wears out quickly after loading.

In this case, we should learn from the following aspects: First, drivers must know their driving habits. Especially in winter, when the engine is just started, the viscosity of engine oil is very high. Lubricating oil film is not easy to form. Floating bearings and thrust bearings are easy to wear. Cars can't slide in neutral after driving at high speed. Secondly, before installing a new supercharger, the grease in the oil pan was not cleaned up, which caused the small lubrication hole on the thrust bearing of the supercharger to be blocked by grease, and the lubrication failed and the shaft seal failed.