The electronic control technology in automobile engines mainly includes the following aspects:
Electronic fuel injection system (EFI)
An electronic fuel injection system is a system that controls the amount of fuel injected through an electronic control unit (ECU). It can adjust the fuel injection quantity in real time according to engine operating conditions, such as engine speed, load, and temperature, to achieve optimal air-fuel ratio and combustion efficiency. The main components of an electronic fuel injection system include:
1.1 Fuel pump: Responsible for delivering fuel from the fuel tank to the fuel injectors.
1.2 Fuel injector: According to the instructions of the ECU, it injects fuel into the engine's intake manifold or combustion chamber.
1.3 Pressure regulator: Used to maintain stable pressure in the fuel system.
1.4 Sensors: including air flow sensor, throttle position sensor, crankshaft position sensor, etc., used to detect the engine's operating status.
1.5 Electronic Control Unit (ECU): Receives sensor signals, calculates the required fuel injection quantity based on the engine's operating status, and sends commands to the injectors.
Electronic ignition system
An electronic ignition system is a system that uses an electronic control unit (ECU) to control the ignition timing and ignition energy. It can adjust the ignition timing and ignition energy in real time according to the engine's operating conditions, such as engine speed, load, and temperature, to achieve optimal combustion efficiency and emissions performance. The electronic ignition system mainly includes the following components:
2.1 Ignition Coil: Converts low-voltage current into high-voltage current to generate sufficient ignition energy.
2.2 Ignition system: Controls the charging and discharging of the ignition coil according to the instructions of the ECU to generate ignition pulses.
2.3 Spark plug: It introduces high-voltage current into the combustion chamber to generate a spark and ignite the air-fuel mixture.
2.4 Crankshaft position sensor: detects engine speed and crankshaft position, providing the ECU with a reference signal for ignition timing.
2.5 Electronic Control Unit (ECU): Receives sensor signals, calculates the required ignition timing and ignition energy based on the engine's operating status, and sends commands to the igniter.
Electronic intake system
An electronically controlled intake system is a system that controls the amount of air intake through an electronic control unit (ECU). It can adjust the intake volume in real time according to the engine's operating conditions, such as engine speed, load, and temperature, to achieve optimal air-fuel ratio and combustion efficiency. The electronically controlled intake system mainly includes the following components:
3.1 Throttle valve: Controls the opening of the intake manifold to regulate the intake air volume.
3.2 Throttle position sensor: detects the throttle opening and provides the ECU with a reference signal for the intake air volume.
3.3 Airflow sensor: detects the airflow in the intake manifold and provides the ECU with a reference signal for the intake volume.
3.4 Electronic Control Unit (ECU): Receives sensor signals, calculates the required intake air volume based on the engine's operating status, and sends commands to the throttle valve.
Electronic emission control system
An electronic emission control system is a system that controls pollutant emissions through an electronic control unit (ECU). It can adjust parameters such as fuel injection quantity, ignition timing, and intake air volume to achieve optimal combustion efficiency and emission performance. The main components of an electronic emission control system include:
4.1 Three-way catalytic converter: converts carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gas into harmless carbon dioxide, water and nitrogen.
4.2 Oxygen sensor: detects the oxygen content in the exhaust gas and provides a reference signal for emission control to the ECU.
4.3 Electronic Control Unit (ECU): Receives sensor signals and adjusts parameters such as fuel injection quantity, ignition timing, and intake air volume according to the engine's operating status to achieve optimal emission performance.
Electronically controlled turbocharging system
An electronically controlled turbocharger system is a system that uses an electronic control unit (ECU) to control the turbocharger. It can adjust the turbocharger's boost pressure in real time based on engine operating conditions, such as engine speed, load, and temperature, to achieve optimal combustion efficiency and power performance. The main components of an electronically controlled turbocharger system include:
5.1 Turbocharger: By compressing the intake air, it increases the intake volume, thereby increasing the engine's power and torque.
5.2 Boost pressure sensor: detects the boost pressure of the turbocharger and provides a reference signal for the boost pressure to the ECU.
5.3 Electronic Control Unit (ECU): Receives sensor signals, calculates the required boost pressure based on the engine's operating status, and sends commands to the turbocharger.
