Thanks to good cylinder filling, the engines described can increase their power by up to 10%. Among other things, the increase in power depends on the boost pressure, which in passenger car engines is between 0.4 and 0.8 bar. If the boost pressure exceeds a certain value, the throttle control valve opens and the pressure decreases.
When using a turbocharger, in addition to engine power, the torque also increases, which is primarily a desired result from the point of view of engine elasticity. Unlike a gasoline engine, a diesel engine does not need to reduce the normal compression ratio due to supercharging, so that in the lower rev range the injected fuel is used completely.
The turbocharger is a precision-made part. Therefore, it is recommended that repairs be carried out only in a workshop or by a qualified specialist. As a rule, if damaged, the turbocharger is completely replaced.
The turbocharger is supplied with oil from the engine lubrication system. To ensure high-quality lubrication of the compressor, the following rules must be observed: Use only the engine oil specified in the operating manual.
Using old oil can cause the turbocharger to become coked. For this reason, the oil and oil filter must be replaced strictly within the specified timeframes.
Since even very small particles of dirt can cause turbocharger failure, never run the engine without an air filter.