What is the role of a diesel engine’s turbocharger?

The role of a diesel engine’s turbocharger is primarily to increase engine power. This is achieved by utilizing exhaust gases to spin a turbine, which then drives a compressor that forces more air into the engine's combustion chamber. By introducing a greater volume of air, the turbocharger allows for more fuel to be burned, leading to a significant increase in power output without necessarily increasing the engine's size or weight. This enhanced air-fuel mixing contributes to a more efficient combustion process, maximizing the engine's energy potential.

Additionally, while turbochargers can also have an indirect effect on emissions by promoting cleaner combustion with improved air intake, their main function is centered around increasing performance. Hence, the primary purpose of a turbocharger is to boost the engine's power, making it an essential component in modern diesel engines designed for maximum efficiency and output.