خرابی تزریق سوخت توربوشارژر

  When the fuel injection system of the turbocharger fails, the inferior heavy oil is used, the afterburn is aggravated, and the exhaust temperature is too high. No matter it is full load or partial load, no matter how serious the afterburn is, its cooperative operation point is on the normal cooperative operation line. As the combustion end point is delayed, the exhaust gas temperature increases, the turbocharger speed increases, the compressor flow rate increases, and the pressure ratio increases.

 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, and 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. Now the most common application is the engine exhaust gas turbocharger. Let us explain some related knowledge of the engine exhaust gas turbocharger in detail.