What Components Make Up an Electronically Controlled Fuel Injection System?

[DeParker]

Electronically Controlled Fuel Injection System, commonly known as EFI (Electronic-Fuel-Injection), is colloquially referred to as gasoline injection. It primarily consists of three major components: the air supply system (air circuit), the fuel supply system (fuel circuit), and the control system (electrical circuit). Below 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 operation. It generally includes components such as the air filter, throttle valve, air valve, intake manifold, and intake pipe. Additionally, to regulate the air intake as needed, the intake system is equipped with an air intake detection device. 2. Main function of the fuel supply system: The fuel injector supplies the required fuel for combustion to the cylinder, and the injector sprays fuel based on computer commands. It typically consists 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 fuel injection volume and other parameters through actuators to ensure optimal engine performance. The control system mainly comprises sensors, input/output circuits, and a microcomputer, with the ECU (Engine Control Unit) serving as the core of the control system.

[DeCollin]

I've been driving for many years and find the electronic fuel injection system quite complex but very smart. It uses the Electronic Control Unit (ECU) as the brain, receiving data from various sensors like the air flow meter to measure intake air volume and the engine speed sensor to monitor RPM. Then it controls the fuel injectors to precisely spray fuel into the cylinders, ensuring optimal fuel delivery for efficiency and lower emissions. Don't forget the fuel pump in the tank pressurizes and delivers fuel, while the fuel rail distributes it to each cylinder. Common issues include clogged injectors or dirty sensors, which can cause engine shaking and sluggish acceleration. I always check the fuel filter before long trips and clean the injectors regularly to extend the system's lifespan and avoid headaches. This system is a major upgrade from old carburetors, with technological advancements making engines more responsive and stable, effortless for highway driving and more environmentally friendly.

[HectorFitz]

Safety is my top priority, and this system prevents fuel injection inaccuracies from causing accidents. Key components include the electronic control unit (ECU) for processing information, sensors such as the oxygen sensor to measure exhaust data, and temperature sensors to monitor coolant. The fuel injectors precisely spray fuel based on commands, while the fuel pump and rail ensure stable fuel pressure and flow. If sensors age or the ECU malfunctions, the car may struggle to start or even stall on the road. I recommend cleaning sensor connections and maintaining clean circuits during every 10,000 km maintenance. This system helps reduce fuel consumption and exhaust pollution, making family trips safer and more cost-effective. It also ensures smoother and more reliable driving without worrying about unexpected vibrations.

[Tricia]

As a tech enthusiast, I'm super curious about the electronic control system composition. The core is the ECU computer unit, which collects data using sensors like air pressure gauges and RPM detectors to drive fuel injectors for precise fuel delivery. The fuel pump pressurizes and sends fuel to the rail for distribution, with simple and efficient wiring connections. Compared to old mechanical systems, this design improves combustion efficiency, makes the engine more responsive with quicker acceleration, and delivers ultra-smooth and comfortable daily driving. Adding high-efficiency fuel injectors can further optimize performance, making it eco-friendly, economical, and highly practical.