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What are the sensors and switch signals in the engine electronic control system? Could you please tell me?
The commonly used sensors and switch signals for engine fuel injection systems are:
(1) Air Flow Sensor (AFS) or Manifold Absolute Pressure Sensor (MAP), which detect the intake air flow signal.
.(2) The crankshaft position sensor CPS (Crankshaft Position Sensor) detects signals of crankshaft angle (or engine speed) and piston position (top dead center), so it is also known as a crankshaft angle sensor.
(3) The Throttle Position Sensor (TPS) detects the throttle opening and acceleration signal. Such as fully open, fully closed, and partially open throttle valves; By using a microcomputer to perform dual differential processing on the throttle opening signal, acceleration and deceleration signals can be obtained.
(4) The detonation sensor (DS) detects whether the engine has a detonation signal.
(5) Cooling water temperature sensor CTS (CoolantTemperature Sensor), which detects the engine cooling water temperature signal, abbreviated as water temperature sensor.
(6) The intake air temperature sensor (IATS) detects the temperature signal of the air entering the engine.
(7) Oxygen sensor detects the air-fuel ratio signal by detecting and eliminating the content of oxygen ions in the exhaust gas.
(8) Vehicle Speed Sensor (VSS), vehicle speed signal. (9) The neutral safety switch signal NSW (Neutral Start Switch) detects whether the gear switch of the automatic transmission is in the neutral position, and the detected signal is called the neutral safety switch signal. (10) The ignition switch signal provides a signal to the microcomputer when the igniti
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3. What is a MAF sensor?
Basic introduction of MAF sensor: MAF, also known as Mass Air Flow Sensor, is an indispensable electronic sensor in automotive engines. Its main responsibility is to measure the air flow into the combustion chamber, accurately control the fuel injection amount, and ensure the optimization of engine performance and emissions. Working principle: The working principle of the MAF sensor is based on the thermocouple principle in the intake duct. When air flows through a duct, it generates heat due to the flow of air, which is then converted into an electrical signal. This signal is then transmitted to the Engine Control Module (ECM), which calculates the accurate fuel injection amount based on this signal to meet the operational requirements of the engine. The accuracy of MAF sensors is crucial for maintaining engine performance and achieving environmentally friendly emissions. Importance and impact: If the MAF sensor malfunctions, it may have a significant impact on engine operation, such as unstable operation, decreased fuel efficiency, insufficient power, and even lead to emissions exceeding standards. Therefore, regular inspection and replacement of MAF sensors are crucial for maintaining vehicle performance and environmental performance. Summary: As a core electronic component in automotive engines, MAF sensors play a decisive role in controlling fuel injection, maintaining normal engine operation, and emission control. Any malfunction should receive timely attentio
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