Why Diesel Turbocharger is so Important?

The turbocharger system has been widely employed in engines, particularly diesel engines, to enhance performance. Diesel turbochargers increase power output and improve the overall performance of diesel engines. Upon installation of a turbocharger, the maximum power output of the engine can increase by approximately 40% or more compared to non-turbocharged engines. However, the daily operation and maintenance of turbocharged engines can be more complex compared to naturally aspirated engines.

Improvements in performance after turbocharging diesel engines include:

  1. Enhancement in Power Performance: Turbocharging increases air intake and fuel supply, significantly boosting engine power by up to 30% to 100%. Additionally, it raises the average effective pressure, surpassing the increase in average mechanical loss pressure, thereby enhancing engine mechanical efficiency. As a result, turbocharging greatly improves engine power performance.
  2. Improvement in Economic Performance: Turbocharging raises the excess air ratio, aiding combustion efficiency, and increasing indicated thermal efficiency and mechanical efficiency. This leads to a reduction in fuel consumption by around 3% to 12%.
  3. Enhancement in Emission Performance: Turbocharging results in larger air intake volumes, leading to a leaner air-fuel mixture and a decrease in harmful emissions such as HC, CO, and smoke. However, turbocharging can also increase NOx emissions due to higher intake temperatures. Yet, utilizing intercooling techniques can mitigate NOx emissions, making turbocharging advantageous for emission reduction overall.
  4. Reduction in Combustion and Exhaust Noise: Turbocharging shortens the fuel’s ignition delay period, resulting in a decrease in combustion noise. Additionally, exhaust noise is reduced as the exhaust can further expand in the turbine.

However, with the improvement in power and economic indicators of turbocharged diesel engines, the mechanical and thermal loads also increase. The increased mechanical load intensifies stress on crankshaft mechanisms and bearings, leading to accelerated wear. Thermal load remains the most critical limitation of turbocharged diesel engines, as increased air and fuel volume raises overall combustion energy, leading to increased thermal load on engine components such as pistons, cylinders, cylinder heads, and exhaust valves. Consequently, this limits the degree to which turbocharging can be applied to diesel engines.

Why Choose Cummins Turbocharger?

Cummins diesel turbochargers are chosen for several reasons, primarily because they exclusively utilize Holset turbochargers. These diesel turbochargers are renowned for their reliability and performance. Among them, the HX40 model stands out with its integrated wastegate, which enhances low-speed responsiveness and overall power delivery. This feature contributes significantly to improved engine performance, making Cummins turbochargers a preferred choice for many applications. Cummins turbocharger include:

  • Cummins 6.7 turbocharger
  • 5.9 Cummins turbocharger
  • Cummins 6bt Turbocharger
  • Cummins 4BT Turbocharger
  • Cummins NT855 Turbocharger
  • Cummins ISX Turbocharger
  • Cummins N14 Turbocharger

Cummins Diesel Turbochargers


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