Auto industry

Modern limousine electronic level control system is the key to the number of sensors used and the level of an ordinary family car is currently installed on approximately tens to hundreds of sensors only , and luxury cars on the number of sensors can be up to two hundred only , usually more than 30 kinds of species , as many as up to one hundred kinds .1, with the electronically controlled fuel injection jet engine sensor1 ) Intake air pressure sensor : reflecting the intake manifold absolute pressure changes in the size , is the ECU ( engine control unit ) provides injection duration calculation reference signal ; sedans are measured using the pressure sensor . Now widely used in the semiconductor varistor inlet air pressure sensor .2 ) Air flow sensors: measurement of engine intake air quantity supplied to the electronic control unit (ECU) as a reference signal for the fuel injection time ; under different measuring principle , rotor blades can be divided into air flow sensor ( TOYOTA PREVIA Wagon ) , Karman vortex air flow sensor trips ( Toyota Lexus LS400 sedan ) , hot air flow sensor ( hot-film air flow sensor and the four types . former two types of volume flow , mass flow rate of the latter two types present the main using hot air flow sensor and two kinds of hot-film air flow sensor .3 ) Throttle Position Sensor : measuring throttle valve opening angle , off the oil supplied to the ECU as the control of fuel / air ratio , ignition advance angle correction of the reference signal ; It has three types : switch contact type throttle position sensor , linear variable resistive throttle position sensor, throttle position sensor integrated .4 ) crank angle sensor : also called crankshaft position Engine Water Temperature Sensorfor detecting the crankshaft and engine speed , to provide to the ECU for determining the working order of the ignition timing and a reference signal ; There are three types : electromagnetic pulse crankshaft position sensor , Hall -effect crankshaft position Engine Position Sensor, photoelectric effect crankshaft position sensor . Crankshaft position sensor is different, its control method and control accuracy are also different. Crankshaft position sensor generally mounted on the crankshaft pulley or sprocket side , some mounted in front of the camshaft , and some are mounted on the distributor 5 ) oxygen sensor : detects the oxygen concentration in the exhaust gas supplied to the ECU as a control of fuel / air ratio in the optimum value ( theoretical value ) near a reference signal ;6) The intake air temperature Motor Position Sensor : detects intake air temperature , provided to the ECU as a basis to calculate the air density ;7 ) Temperature sensor : detects coolant temperature , engine temperature, provide the information to the ECU ;
8 ) Knock Sensor: mounted in the cylinder test engine specialized deflagration situation, providing a signal to the ECU to adjust ignition timing based .
9 ) the knock sensor : installed in the engine block , ready to monitor engine knock situation . There are currently used in resonant and non- resonant two categories.