What do automotive sensors do What do automotive sensors do?

The function of the door sensor is to judge the state of the door switch, if it is not closed tightly, start the car, the car will alarm, prompt to close the door, to ensure driving safety.

Car doors have a complex structure and contain many parts, such as door locks, glass lifts, sensors, horns and anti-collision beams, as well as waterproof membranes and soundproof cotton. If it is subjected to a strong impact for a long time, the parts inside are easy to loosen and produce abnormal noise, and the service life of some parts such as sensors will also be greatly shortened.

The door and body are connected together by hinges, the former being a fixed effect, and the latter limiting the angle at which the door opens. The strong impact force can easily cause damage to these two parts, causing permanent deformation and displacement of the door.

Sensors are equivalent to human eyes, noses, ears, and even **, which can transmit information to the car's brain (ECU), and the car's brain will make judgments like a human after receiving the information. So, sensors are a class of components that collect information and feedback. Hope it helps.

The main functions of oxygen transfer are:1By detecting the oxygen content in the exhaust, the air-fuel ratio of the engine is detected; 2.In the closed-loop control is used for the correction of the pulse width of the fuel injection; 3.Check the conversion efficiency of the catalytic converter.

According to different materials, it can be divided into two types: zirconia type (ZRO2) and titanium oxide (TiO2) type.

Main speed sensor.

Function: It is used to feedback the engine speed signal to the feedback signal of the main speed sensor, compare it with the speed set in the program, judge whether the engine speed is normal, whether the engine load state is normal, and combine other feedback signals to control the engine and hydraulic system. In abnormal cases, the hydraulic system will be controlled to reduce horsepower or stop the engine.

2.Common rail pressure sensor.

Function: It is used to feedback the pressure signal of high-pressure diesel in the common rail cavity to the ECU. Because the common rail diesel engine control system adopts high-pressure injection, the injection pressure is more than 10 times higher than that of the general direct injection engine.

Therefore, the ECU will monitor the diesel pressure in the common rail cavity in real time, judge according to the feedback pressure signal and other feedback signals, and send command signals to the injector solenoid valve, EGR solenoid valve, SCV valve and other control units.

3.Flow sensors.

Function: Most of the flow sensors on automobiles measure the air flow and fuel flow of the engine, which can convert the flow into an electrical signal. Among them, air flow sensors are widely used, mainly used to monitor the combustion status, starting and ignition of the engine, and provide a basis for calculating the fuel supply.

According to the principle, it can be divided into volumetric flowmeter and mass flowmeter, and according to the structure, it can be divided into hot film flowmeter, ** flowmeter, leaf flowmeter and Carmen vortex flowmeter. The measurement accuracy of the vane flowmeter is low, and temperature compensation is required; ** Thermal film and hot film measurement accuracy is high and does not require temperature compensation. In general, thermal film flowmeters are favored by industrial production due to their small size.

1. Oil pressure sensor:

1. Function: The oil pressure sensor of the car is an important device for detecting the oil pressure of the vehicle engine, and the detected data can help control the normal operation of the engine.

2. Working principle: The oil pressure sensor is installed on the main oil duct of the engine, when the engine is running, the pressure measuring device detects the pressure of the oil, converts the pressure signal into an electrical signal and sends it to the signal processing circuit.

After voltage amplification and current amplification, the amplified pressure signal is connected to the oil pressure indicator through the signal line, and the ratio of the current passed by the two coils inside the oil pressure indicator is changed, so as to indicate the oil pressure of the engine.

After voltage amplification and current amplification of the pressure signal, but also compared with the alarm voltage set in the alarm circuit, when lower than the alarm voltage, the alarm circuit will output the alarm signal, and the alarm light is lit through the alarm line.

2. Water temperature sensor:

1. Function: It is to tell the engine control unit how much temperature is now. In turn, its signal is extremely important for the control unit. The main thing is that the engine has different working methods at different operating temperatures.

2. Working principle: The water level sensor in the container transmits the felt water level signal to the controller, and the computer in the controller compares the measured water level signal with the set signal to obtain the deviation, and then sends it to the water supply electric valve according to the nature of the deviation"On""off"to ensure that the container reaches the set water level.

After the water inlet process is completed, the computer in the temperature control part sends out to the electric valve that supplies the heat medium"On"The system then begins to heat the water in the container. When it comes to the set temperature. The controller issued a command to close the valve, cut off the heat source, and the system entered the insulation state.

In the process of programming, to ensure that the system does not reach the safe water level, the electric control valve that controls the heat source does not open the valve, so as to avoid heat loss and accidents.

3. Turbocharger sensor:

1. Function: The turbocharger is actually an air compressor that compresses air to increase the air intake. As the engine speed increases, the exhaust gas exhaust speed increases in tandem with the turbine speed.

The impeller compresses more air into the cylinder, and the pressure and density of the air can increase to burn more fuel, and the corresponding increase in fuel volume and adjust the speed of the engine can increase the output power of the engine.

2. Working principle: Turbocharger is an air compressor driven by the structure composed of two impellers on the coaxial basis by using the exhaust gas generated by the operation of the internal combustion engine. Similar to superchargers, both increase the flow of air into an internal combustion engine or boiler, resulting in more efficient combustion.

Commonly used in automotive engines, turbochargers can increase the output of an internal combustion engine or improve fuel economy at the same output by using the heat and flow from exhaust gases.

The function of the automotive sensor is to convert the information of various working conditions in the operation of the car, such as vehicle speed, temperature of various media, engine operating conditions, etc., into electrical signals and transmit them to the computer, so that the engine is in the best working condition. The following is a relevant introduction to sensors: 1. There are many automotive sensors, which can be classified as measurement temperature sensors, pressure sensors, flow sensors, position sensors, automotive speed sensors, distance sensors, etc. according to the role of sensors in automobiles.

2. They perform their own duties, once a sensor fails, the corresponding device can not work normally or even does not work, thus affecting the operation of the car.

The car sensor is the input device of the car computer system, which is very familiar to the car owner, so let's talk about what is the role of the car sensor?

1. The car sensor is the input device of the car computer system, and its function is to convert the information of various working conditions in the operation of the car, such as vehicle speed, temperature of various media, engine operating conditions, etc., into electrical signals and transmit them to the computer, so that the car is in the best working condition.

2. There are many automotive sensors, and when judging the failure of the sensor, we should not only consider the sensor itself, but also the entire circuit of the fault. Therefore, when looking for faults, in addition to the sensor, it is also necessary to check the wiring harness, the connector, and the relevant circuitry between the sensor and the electronic control unit.

3. One of the characteristics of the development of automotive technology is that more and more components are electronically controlled. According to the role of the sensor, it can be classified as a sensor that measures temperature, pressure, flow, position, gas concentration, speed, brightness, dry humidity, distance and other functions. Therefore, the role of sensors in the car is very important.

That's it for what the role of automotive sensors is.

The function of the automotive sensor is to convert the information of various working conditions in the operation of the car, such as vehicle speed, temperature of various media, engine operating conditions, etc., into electrical signals and transmit them to the computer, so that the engine is in the best working condition.

There are many automotive sensors, according to the role of the sensor in the car classification, can be classified as measuring temperature sensor, pressure sensor, flow sensor, position sensor, car speed sensor, distance sensor, etc., they perform their own duties, in one fell swoop a sensor failure, the corresponding corresponding device can not work normally in the bench or even do not work, thus affecting the operation of the car. Common Zaodashan automotive sensors are:

Intake pressure sensor: reflects the change in the absolute pressure in the intake manifold and provides a reference signal to the ECU (engine electronic control unit) to calculate the duration of fuel injection;

Air flow meter: measures the amount of air inhaled by the engine and provides it to the ECU as a reference signal for the injection time;

Throttle position sensor: measure the angle of throttle opening, and provide ECU as a reference signal for oil cut-off, control of fuel-air ratio, and ignition advance angle correction;

Crankshaft position sensor: detect the crankshaft and engine speed, and provide it to the ECU as a reference signal to determine the ignition timing and working sequence;

Oxygen sensor: detects the oxygen concentration in the exhaust gas and provides it to the ECU as a reference signal to control the fuel-to-air ratio near the optimal value (theoretical value);

Inlet air temperature sensor: detect the inlet air temperature and provide it to the ECU as the basis for calculating the air density;

Coolant temperature sensor: detects the temperature of the coolant and provides engine temperature information to the ECU;

Detonation sensor: Installed on the cylinder block to detect the deflagration status of the engine, it is provided to the ECU to adjust the ignition advance angle according to the signal.

Photo by Ling Xiufang of Pacific Automobile Network).

Responsible for the collection and transmission of information. 1. The automobile sensor is the input device of the vehicle computer system, which converts all kinds of working information in the operation of the vehicle into electronic signals and transmits it to the computer, so that the engine is in the best running state; 2. When the automotive sensor is looking for faults, in addition to checking the sensor, it is also necessary to check the wiring harness, plug-in parts and the relevant circuits between the sensor and the motor control unit. According to the energy relationship, sensors can be divided into two categories:

Active and passive. Most of the sensors used in cars are passive, and only by adding an additional power source can the sensors generate an electrical signal. The output signal of the sensor mainly includes analog signal and digital signal, in which the digital signal can be directly input into the motor control unit, and the analog signal needs to be converted into a digital signal by a D converter before being input into the motor control unit.

In the on-board instrument system, the sensors of various instruments are used to convert physical parameters such as engine temperature, oil pressure, speed, transmission output shaft speed, and fuel tank oil level height into corresponding voltage, current or electrical pulse. The vehicle electronic control system consists of sensors, electronic controllers, electronic control units, and actuators.