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As sensors evolve towards electronic and digital technologies, automotive sensors have expanded from being solely used in engines to now being applied in chassis, body, and lighting electrical systems. The output values of automotive sensors will have more relevant applications (applications of automotive sensors). To this end, manufacturers are developing and producing better sensors. So, what is the role of automotive sensors? I have compiled and summarized the functions of commonly used automotive sensors.1.Intake Pressure Sensor,
The intake pressure sensor is used to indirectly measure air;when the throttle is released, the vacuum is high, and when the throttle is pressed, the vacuum is low;when the vacuum is low, more fuel is injected, proportionally for medium and small loads!To find it is easy, look for the trace behind the throttle!2.Cylinder Position SensorThe cylinder position sensor has an irreplaceable role;once the signal is lost, how can the engine start?At this time, the computer is confused, not knowing which cylinder is at the top dead center!!
3.Camshaft Position SensorThe camshaft position sensor is generally installed in the distributor;if not installed in the distributor, look for it in front and behind the camshaft!Its function is simple, specifically measuring the top dead center of one cylinder;the report to the computer is complete, firing sequence and injection sequence, without it the computer cannot operate……
4.Throttle Position SensorThe throttle position sensor provides the load signal;remember the five operating conditions, four of which are related to it!When the throttle is closed, it is idle, the signal voltage is a few hundredths;when the throttle is wide open, the load is high, the signal voltage is 4.8;it not only controls the engine but also the automatic transmission!
5.Heated Oxygen SensorThe heated oxygen sensor measures oxygen in the exhaust pipe;it is used to control the air-fuel ratio, zirconia is the electrolyte, generating its own electromotive force;when there is too much oxygen, the fuel is lean, the signal voltage is 0.1; when there is too little oxygen, the fuel is rich, the signal voltage is 0.9;the computer adjusts the fuel amount based on this, changing 8 times every 10 seconds, if it doesn’t change, replace it quickly!
6.Piezoelectric Knock SensorThe piezoelectric knock sensor is generally installed on the cylinder block;once it detects the knock frequency (6-9KHz), the ignition angle is retarded,the knock disappears, and the ignition starts to advance;it controls the best ignition point, always at the edge of the knock zone!
One of the characteristics of modern automotive technology development is the increasing number of components that use electronic control. The operation of electronic automatic control relies on the feedback information from sensors. According to statistics, there are generally dozens of sensors in an ordinary car, while high-end cars have over 100 sensors.
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