What is Engine Sensors?
A modern car’s Engine Management System consists of various electronic and electrical components. Moreover, these comprise engine sensors, relays, and actuators. They provide the car’s Engine Control Unit with vital data parameters essential to govern various engine functions effectively.
Engine sensors are elector-mechanical devices that monitor various engine parameters. An engine uses different types of sensors such as Thermocouples, Resistance Temperature Detectors (RTDs), and Hall Effect sensors.
A Modern-day Car Has The Following Sensors:
|SL.||Name of the Sensor||Purpose|
|01||Air- fuel Ratio meter||It monitors the correct air-fuel ratio for the engine|
|02||Engine Speed Sensor||It monitors engine speed|
|03||Throttle Position Sensor||Further, it monitors the position of the throttle in an engine|
|04||Crank position sensor||Monitors piston’s TDC position in the engine|
|05||Cam Position Sensor||Further, it monitors the position of valves in the engine|
|06||Knock Sensor||Detects engine knocking because of timing advance|
|07||Engine coolant temperature sensor||Moreover, it measures the engine temperature|
|08||Manifold Absolute Pressure or MAP Sensor||Used to regulate fuel metering|
|09||Mass Air Flow or MAF Sensor||Further, it notifies the mass of air entering the engine to ECU|
|10||Oxygen/02/lambda sensor||It monitors the amount of oxygen in the exhaust|
|11||Fuel Pressure Sensor||Additionally, it measures pressure in the fuel system|
|12||Vehicle Speed Sensor (VSS)||Measures the speed of a vehicle|
Furthermore, the Electronic control Unit sends signals to various relays and actuators after calculating the fuel quantity. They include the ignition Circuit Spark Plugs, Fuel Injectors Engine Idling Air Control valve, and Exhaust Gas Re-circulation (EGR) valve. Thus, it extracts the best possible engine performance while keeping emissions as low as possible.
Since all the engine sensors connect to the ECU, it can also monitor them for malfunction. Besides, the ECU collects signals from faulty engine sensors. Then again, the ECU stores them in its memory. So, you can diagnose these faults through two methods. Firstly, by reading the ECU memory with the help of ‘fault codes.’ Or diagnostic with any available car scanner or blou tooth device like ELM 327 or other