Here we come to know about the main sensor on the car. Air flow sensor is the sucked air into electrical signals supplied to the electronic control unit (ECU), as one of the signals determines the basic fuel injection. Depending on the measuring principle, can be divided into the rotor blades air flow sensor, Karman vortex air flow sensor tours, hot air flow sensor and the hot film air flow sensor four types. To quote the first two, the latter two vehicles volume flow mass flow sensor type. The main use of hot air flow sensor and two kinds of hot-film air flow sensor. Crankshaft position sensor, also known as the crank angle sensor, the computer-controlled ignition system the most important sensors, whose role is to detect top dead center signal, the crank angle signal and engine speed signal, and input into the computer automotive sensors, so that the computer can optimum ignition timing instruction issued by the cylinder firing order. Crankshaft position sensor, there are three types: electromagnetic pulse crankshaft position sensor, Hall effect crankshaft position sensor, crankshaft position sensor photoelectric effect. Crankshaft position sensor types for different vehicle sensors which, its control mode and the control accuracy is also different. Crankshaft position sensor is usually installed on the crankshaft pulley or sprocket side, some mounted on the front end of the camshaft, and some are mounted on the distributor. Knock sensor mounted on the engine block, ready to monitor the engine's knock. Using resonant and non-resonant two categories. Automotive Sensor role Puyang automotive sensors _ _ Xinfeng Xinfeng sensing provided by Xinxiang purification technology Limited. Xinxiang City Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) strong, credible, Xinxiang in Henan sensor industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead Xinfeng innovative ideas into the brilliant and you work for a better future!