Turbocharger fuel injection failure
Turbocharger fuel injection failure
Turbocharger rotor When the fuel injection system fails, the poor quality heavy oil is used, the afterburn is aggravated, and the exhaust gas temperature is too high. No matter it is full load or partial load, no matter how serious the afterburn is, the cooperative operation increases, the pressure ratio increases, and the cooperative operation point moves to the higher part of the curve, and the surge margin is less.
poor cooling
When the cooling capacity of the air cooler decreases, the exhaust gas temperature of the diesel engine increases, the speed of the compressor increases, the operating point moves to a higher place, and the surge margin decreases.
In a word, the non-flow channel blocking influencing factors will not affect the flow characteristics, and will not change the position of the matching operation line between the supercharger and the diesel engine. A secondary cause of supercharger surge.
The exhaust gas turbocharger uses the high-temperature exhaust gas discharged from the engine at 700-900 degrees Celsius to drive the turbine in the turbine to rotate. The turbine shaft drives the impeller in the compressor to rotate at a high speed, compresses the air in a centrifugal way, and increases the intake density of the engine to 2-3 atmospheres. In this way, we can inject more fuel into the engine to achieve the purpose of increasing the engine's own power.
The exhaust gas turbocharger consists of a turbine driven by exhaust gas, a compressor that compresses fresh air, an intermediate body that supports bearings and a bypass valve control mechanism. The supercharger shall refer to the engine intake supercharger, which includes three forms: exhaust gas turbocharger, mechanical turbocharger, and electric auxiliary turbocharger. The air is compressed by the supercharger to increase the intake density of the engine, thereby increasing the liter power of the engine. At the same time, due to the improvement of the mixed combustion regulation of the engine, the combustion efficiency is improved, and the effect of fuel saving and emission reduction can also be achieved. It is an important technological advancement for modern engines.
