The diesel engine test bench is mainly composed of the engine, measurement and control system, loading device, data acquisition and processing system, etc. It is used to simulate the actual working conditions of the diesel engine and conduct performance tests and optimizations. Its components work together to provide strong support for the research and development of diesel engines. The diesel engine test bench is an indispensable and important device in the process of diesel engine research and development, production and maintenance. It is mainly used to simulate the operating state of diesel engines in the actual working environment, so as to conduct performance tests, fault diagnosis and optimization adjustments.