The common rail system refers to a closed-loop fuel supply system composed of a fuel tank, a gear pump, an oil-water separator, a gear pump, a diesel fine filter, a high-pressure pump, a common rail pipe, an injector, and sensors and an ECU. It completely separates the generation of injection pressure and the injection process.

The mechanical fuel system is a traditional diesel engine fuel system that mechanically increases diesel pressure, adjusts fuel injection quantity, automatically controls fuel injection timing, stabilizes idle speed, and limits overspeed based on the driver's control of the accelerator pedal.

The fuel injection system testing equipment is an analytical instrument used in the fields of mechanical engineering, power and electrical engineering, which can simulate and test the control of fuel supply systems. The entire system has a drive motor with an encoder, diesel fuel supply, diesel return oil tank, oil supply oil tank, and return oil tank. Diesel fuel and engine oil supply pressure and flow are independently adjustable, and diesel engine oil has an independent circulation system with heating and cooling functions.

The intake system of a diesel engine consists of an intake pipe, an air filter, an intake manifold, a turbocharger, etc. Its function is to provide clean fresh air, a suitable concentration of mixture (throttle type), and sufficient and uniform intake to each cylinder.

The exhaust system of a diesel engine includes components such as the intake pipe, exhaust pipe, exhaust pipe muffler, exhaust gas recirculation device EGR, turbocharger, and steam emission system, among which the turbocharger and EGR are commonly used auxiliary devices. Can help improve the performance and combustion efficiency of diesel engines.