The fuel supply system is an indispensable part of the automobile engine, which is responsible for providing the engine with a combustible mixture. The system consists of multiple components, including a fuel tank, a fuel pump, a fuel buffer, a fuel pressure regulator, a fuel filter, an injector, and a cold start valve (cold start injector). The main function of the fuel supply system is to store and filter fuel and convert it into a combustible mixture to meet the needs of the engine. The supply method of different fuels will be different. For example, the gasoline supply system will prepare a certain amount and concentration of mixed gas according to the requirements of the engine. In addition, the fuel supply system usually adopts two structural modes, one with a return pipe technology and the other without a return pipe technology. The fuel supply system plays a vital role in the normal operation of the automobile engine.
The working principle of the fuel supply system is to extract the fuel from the fuel tank and deliver it to the engine combustion chamber. In this process, the fuel supply system needs to maintain a stable flow and pressure of the fuel to ensure the normal operation of the engine. The fuel pump is the core component of the fuel supply system, which is responsible for extracting the fuel from the fuel tank and delivering it to the engine. The fuel buffer is used to adjust the flow and pressure of the fuel to ensure the stability of the fuel supply system. The fuel filter is used to filter impurities and contaminants in the fuel to protect the engine from damage. The injector sprays the fuel into the engine combustion chamber to achieve the generation of combustible mixture. The cold start valve (cold start injector) is used to provide additional fuel when the engine is cold started to ensure that the engine can start smoothly.
The design and working mode of the fuel supply system will vary depending on the fuel. For example, the gasoline supply system usually adopts two structural modes, one with return pipe technology and the other without return pipe technology. The fuel supply system with return pipe technology will return the excess fuel to the fuel tank when the engine stops running to save fuel and protect the environment. The technology without return pipe does not have this function, but it can use fuel more efficiently and improve fuel utilization. Regardless of the structural mode, the fuel supply system needs to maintain a stable working state to ensure the normal operation of the engine.