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Composition of Electronic Fuel Injection System?

2 Answers

NathanRose

09/04/25 2:37am

Electronic Fuel Injection System, abbreviated as EFI system. Gasoline injection mainly consists of three major parts: the air supply system (air path), the fuel supply system (fuel path), and the control system (circuit). The following is a detailed introduction to each component: 1. Main function of the air supply system: To provide the necessary air for the engine and control the air supply during normal engine operation. It generally consists of components such as the air filter, throttle valve, air valve, intake manifold, and intake ports. Additionally, to regulate the intake air volume at any time, the intake system is equipped with an air intake detection device. 2. Main function of the fuel supply system: The fuel injector supplies the fuel required for combustion to the cylinder, and the injector sprays fuel according to computer commands. It is generally composed of the fuel tank, fuel pump, fuel filter, pressure regulator, and fuel injector. 3. Main function of the control system: Based on signals from various sensors, the computer performs comprehensive analysis and processing, controlling the fuel injection volume and other parameters through execution devices to ensure optimal engine performance. The control system mainly consists of sensors, input/output circuits, and a microcomputer, with the ECU being the core of the control system.

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LeAdaline

09/16/25 3:49am

Having driven sedans for years, I've gained some insights into the electronic fuel injection system. It mainly consists of several components: the ECU (Engine Control Unit) is the core computer that manages all operations; the fuel injector precisely sprays fuel into the engine, functioning like a precision faucet; the fuel pump draws fuel from the tank and delivers it at adequate pressure; plus sensors like the air flow sensor measuring intake volume and oxygen sensor monitoring exhaust composition, which inform the ECU to adjust fuel injection. During daily driving, I've observed the system's operation - when sensors malfunction causing inaccurate fuel injection, the car may shake or consume more fuel. Regular cleaning of injectors and oil changes can prevent clogging and extend system lifespan. It's a practical design that ensures smoother starts, reduced noise, and relatively easy maintenance.

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