What sensors are there in the car? What are their functions?

Sensors in automobiles include: temperature sensors (cooling water temperature sensors THW, THA, air temperature sensors); Flow sensors (air flow sensor, fuel flow sensor); Intake pressure sensor diagram; ; Throttle position sensor TPS；; Engine speed sensor; Speed sensor SPD；; Crankshaft position sensor (ignition timing sensor); Oxygen sensor; Knock sensor (KNK).

Air? The flow sensor converts the inhaled air into an electrical signal and sends it to the electronic control unit (ECU) as one of the basic signals to determine the fuel injection. According to the different measuring principles, it can be divided into four types: rotary vane air flow sensor, Carmen vortex air flow sensor, hot wire air flow sensor and hot film air flow sensor. The first two are volume flow type and the last two are mass flow type. Hot-wire air flow sensor and hot-film air flow sensor are mainly used.

The intake pressure sensor can measure the absolute pressure in the intake manifold according to the load state of the engine, and convert it into an electrical signal, which is sent to the computer together with the speed signal as the basis for determining the basic fuel injection quantity of the injector. Semiconductor piezoresistive intake pressure sensor is widely used. Wait a minute.

Crankshaft position sensor, also known as crank angle sensor, is the most important sensor in computer-controlled ignition system. Its function is to detect the top dead center signal, crank angle signal and engine speed signal, and input them into the computer, so that the computer can issue the best ignition time instruction according to the ignition sequence of cylinders. There are three kinds of crankshaft position sensors: electromagnetic pulse crankshaft position sensor and? Hall effect crankshaft position sensor, photoelectric effect crankshaft position sensor. Different types of crankshaft position sensors have different control modes and control accuracy. Crankshaft position sensor is generally installed on one side of crankshaft pulley or sprocket, some are installed at the front end of camshaft, and some are installed on distributor.

Vehicle sensor is the input device of automobile computer system, which is divided into grating, thermocouple and other sensors, and usually consists of three parts: sensitive element, conversion element and measuring circuit. It converts the information of various working conditions in automobile operation, such as vehicle speed, various medium temperatures, engine working conditions, etc. , converted into electrical signals and transmitted to the computer, so that the engine can be in the best working state.