Automatic Air temperature sensor

Automatic air conditioning system temperature sensor comprising: an engine coolant temperature sensor, in-car temperature sensor, ambient temperature sensor, evaporator temperature sensor. Based on these sensor signals the control unit to calculate the air blown into the cabin temperature required to select the desired amount of air and control air mixture inlet valve, out of air intake converter board, etc., in a temperature range set by the driver automatically adjust the temperature inside the cabin, to achieve the best, and automatically controlling the air conditioner on and off. One of the conditions refrigeration air-conditioning system is the ambient temperature is higher than room temperature, ambient Crank Shaft Position Sensor circuit, terminal water, bad or poor grounding, the data stream will be displayed below -30 ℃ ambient temperature, will cause air conditioning is not cooling. Meanwhile, the engine coolant Engine Coolant Temperature Sensor circuit or grounding line is bad, the signal is lost in time, cooling fan does not turn, lead to air conditioning cooling efficiency, will enter the fail-safe, allowing air conditioning to stop working

Air temperature sensor

When the engine coolant temperature exceeds 120 ℃, in order to protect the engine, make air conditioning stopped working. Air conditioning compressor refrigerant temperature is too high, the temperature switch will cut off the compressor electromagnetic clutch circuit. An evaporator installed in the center of the evaporator Crank Position Sensors  or temperature switch by controlling the operation of the air conditioning compressor to control the temperature of the evaporator. Evaporator temperature control is intended to prevent the evaporator frost. If the evaporator temperature is below 0 ℃, condensation surface of the water in the evaporator will frost or ice, in severe congestion evaporator air passage, resulting in significantly reduced cooling effect of the cooling system. In order to avoid frost evaporator, the evaporator temperature must be controlled at above 0 ℃. Evaporator temperature is too low, lower than the set value below 0 ℃, the air conditioning compressor electromagnetic clutch amplifier will cut off the circuit. Evaporator outlet temperature sensor failure, can cause frequent air conditioning compressor clutch pull and separation. Between the expansion valve to the evaporator frost line will result in a small amount of air out of the wind.Conversely increase fuel injection pulse width.

The role of the oxygen sensor , which has several how to detect the oxygen sensor is good or bad

The role of the oxygen sensor , which has several how to detect the oxygen sensor is good or badThe fundamental role of the oxygen sensor is used to detect the exhaust oxygen concentration , then ECU ( Engine Control Computer ) will be provided through Auto Temperature Sensor signal to determine the oxygen concentration in the combustion engine ( front oxygen ) or the efficiency of the catalytic converter ( after oxygen ) .Before the oxygen signal for closed-loop control of the input signal , if the judge is too lean mixture combustion is carried injection plus thick, too thick then cut thin for injection , in order to control burning more fully , so that fuel economy andengine better working conditions .After the oxygen signal is used to determine the conversion efficiency of catalytic converters , catalytic converter if serious aging or failure , you can not be an effective catalyst for exhaust , catalytic converters affect the oxygen concentration in the exhaust gas through the oxygen concentration can be determined at this time whether the catalytic converter working properly. Also, according to the catalytic converters in the exhaust gas oxygen concentration can be corrected fuel injection ( fine ) , so that better fuel economy and emissions .
Engine Temperature Sensors detection , first passed in the service shop to detect whether there is a corresponding diagnostic trouble codes , and then detect the corresponding line connection if there are problems ( via plug or replace the wiring harness, etc. ) , and if the problem is recognized as an oxygen sensor oxygen sensor will need to be Remove to return to the supplier for detailed detection and analysis , this can not be in the service shop or your own testing, because the oxygen sensor is relatively complex. Confirm whether the oxygen sensor failure , there is a way to get a new oxygen sensor up, see if the fault reproduction

How to determine the role of oxygen sensor oxygen sensor oxygen sensor bad or bad impact on the car

How to determine the role of oxygen sensor oxygen sensor oxygen sensor bad or bad impact on the carSimple and effective means of detection is to use a scanner to read the oxygen sensor's dynamic data flow, see the work of the oxygen sensor signal voltage value is changed within reasonable limits ; using an oscilloscope waveform of the oxygen sensor detection  Effect of oxygen content in the exhaust gas oxygen sensor can cause a change in the voltage signal within the operating voltage range of the jump stop . The engine control voltage received by Crank Position Sensor signal voltage , so the voltage value to determine the state of the gas mixture , thereby adjusting the fuel injection pulse width . This is a simple statement. The role of oxygen sensors significance [ fuel trim , catalytic converter monitoring, emissions monitoring , oxygen sensor monitoringAbnormal oxygen sensor , caused by the failure is multifaceted , performance of fault symptoms are not the same, as may, the fault location , the signal value of the size , Make ----- and different control strategies .

Car inside and outside temperature sensor

Car inside and outside temperature sensor is broken what role have any effect on the air conditioningAir-conditioning ECU used for monitoring data flow control active conditioning may not be active if the air conditioning is broken or replaced with alternate value Crank Position Sensor  is to detect bad air conditioning does not work or does not work well.

Photoelectric sensor works

Signal plate mounted on the light emitting diode (LED) and phototransistor (or photodiode) between. When the signal light on the disc is rotated to bore between the LED and phototransistor, LED will emit light irradiated onto the photosensitive transistor, when the photosensitive transistor, the collector output low (0.1 ~ O.3V ); when the signal on the disc is rotated to the light-shielding portion between the LED and phototransistor, LED emitted light can not be irradiated onto the photosensitive transistor, phototransistor time off, its collector output high (4.8 ~ 5.2V) . If the signal plate continuous rotation, light holes and partial shading LED will alternately turn the light or shade, phototransistor collector output will alternately high and low. When Camshaft Position Sensor shaft equipped with the crankshaft and camshaft rotates, the signal light on the disc begins with holes and partial shading between the LED and phototransistor turned, LED panel light emitted by the light and shade effect signal will alternate irradiation phototransistor to the signal generator, the signal will be generated in Car Sensors and the camshaft position corresponding to the position pulse signal. As the crankshaft rotates two turn signal transducer shaft disc revolution, therefore, G signal sensor will produce six pulse signal. Ne signal sensor 360 will produce a pulse signal. Since the G signal interval radians aperture 60. , 120 each time the crankshaft rotates. A pulse signal is generated, it is usually referred to as the G signal 120.

linear throttle position sensor

Linear throttle position sensor mounted on the throttle valve , which can continuously detect the throttle opening degree . It mainly consists of the potentiometer and the throttle linkage , idle contact other components. The movable contact of the potentiometer (i.e., a throttle opening degree output contact ) with the throttle valve opening degree of the resistor film , thereby sliding the contacts (TTA terminal ) and the throttle opening degree obtained a linear voltage output proportional . Figure . When the throttle is fully closed , the other one with the throttle linkage dynamic contact with IDL contacts connected , Auto Temperature Sensor output idle signal. Throttle position output of the linear voltage signal after A / D converter and transported to the computer.

Switch type throttle position sensor

The throttle position sensor is essentially a switch , also known as the throttle switch. The throttle Sensor Camshaft includes moving contact , idle contact , full load contacts. The idle and full load contacts contact can detect the engine idling condition and heavy load state. Generally referred to as the moving contact TL contacts, idle contact called IDL contact, full load contacts called PSW contacts. It can be seen from the structure , with the throttle linkage rod under the action of the cam can be rotated , the movable contact moving along the cam groove . The throttle Crank Position Sensor structure is relatively simple, but its output is discontinuous . The throttle fully closed , the voltage applied to the terminal from the IDL terminal TL , then back to the electronic controller . The way through the transmission signal, the electronic controller is now understood throttle fully closed state. When the accelerator pedal is depressed , in a section of the door opening degree or more , the voltage terminals from the TL terminal PSW then passed through the electronic controller . Electronic controller understand, now open for a certain angle of the throttle . Below I will idle speed signal and the load signal to illustrate the impact of the fuel injection quantity . When IDL signal output and engine speed exceeds a predetermined speed , the interrupt oil supply to prevent overheating of the catalyst and fuel savings . When IDL signal output from a switch to no output , the electronic controller determines the throttle from fully closed state to the open state of change , of course, will determine the vehicle is started or re- shaped in order to accelerate the engine warm-up will be based on the state of accelerated concentration , increasing the fuel injection quantity , in order to supply the required acceleration darker mixture. When a signal is input to PSW electronic controller , then play enriched output function , increasing the amount of fuel injection . In heavy traffic , if there is no signal output PSW , it will not effect the output concentration , the engine output power will be slightly lower .

Auto Sensor - Sensor Linearity

Typically, the actual sensor output static characteristic curve is not linear. In practice, in order to make the instrument readings with a uniform scale, often a fitting line approximately represents the actual characteristic curve, linearity (nonlinearity) is the degree of approximation of a performance index.
The selection of fitting a straight line with a variety of methods. If the zero point of the input and the output is connected to the full-scale theory of linear as fitting a straight line; or characteristic points on the curve with the sum of squared deviations is minimized as the theoretical straight line fit, this proposed method of least squares fitting straight line is called fit straight line.Automotive sensor - sensor sensitivitySensitivity of Crank Sensor is in the steady state operation of the volume variation of the input change △ y △ x ratio.It is the output of an input characteristics of the slope. If the sensor output and the significant linear relationship between the input, the sensitivity S is a constant. Otherwise, it changes with the input change.
Dimensionless sensitivity is the output, input quantities dimensionless ratio. For example, a displacement sensor, the displacement 1mm, the output voltage is 200mV, then the sensitivity should be expressed as 200mV/mm.
When Crank Position Sensor output, the input of the same dimension, the sensitivity may be understood to magnification.
Improve the sensitivity, a higher measurement accuracy. However, the higher the sensitivity, the more narrow range, stability is often worse.

Auto sensor - sensor's dynamic characteristics

The so-called dynamic characteristics,Sensor Camshaft  is a change in input, its output characteristic. In practice, the dynamic characteristics of the sensor used some of its standard input signal in response to represent. This is because Shaft Position Sensor input signal in response to the standard test method is easy to obtain, and its standard input signal, and its response to any input signal, there is a certain relationship between the responses, often the former can be presumed that the latter. The most commonly used standard input signal and a sinusoidal signal step signal are two dynamic characteristics of the sensor is also used to step response and frequency response means.

Car Sensor - Sensor classification

Currently there is no one on the sensor uniform classification methods, but more common are the following three ways:1, according to the physical quantity sensor classification, can be divided Car Cooling Temp Sensor, force, velocity, temperature, flow, gas composition, and other sensors 2, the principle of classification by the sensor, can be divided into resistors, capacitors, inductors, voltage, Hall, optical, grating , thermocouples and other sensors. 3, according to Car Sensors of the sensor output signal classification, can be divided into: the output switch ("1" and "0" or "on" and "off") of the switch sensor; output is an analog type sensor; output pulse or code digital sensors.

Automotive sensors - sensors Definition

National standard GB7665-87 under the sensor is defined as: "can feel required to be measured in accordance Camshaft Positioning Sensor convert the signal of the device or the device, usually by a sensitive components and conversion components." Sensor is a detecting means, the information being measured can feel, and can detect information on feel, converted into an electric signal according to certain rules, Crank Position Sensors of information output required to meet the information transmission, processing, storage, display, recording and control requirements. It is to achieve automatic detection and automatic control of the primary link.

Classification of the sensor

Sensor industry is a knowledge-intensive, technology-intensive industries, it is relevant to many disciplines, and a very large variety. The following will now widely used as a sensor classification brief.1 According to the working principle of classification sensorThis is Position Sensors classification sensor, this classification will be physics, chemistry, biology and other disciplines principle, rules and effect as a basis for classification, help explain the working principle of the sensor and the sensor in-depth research and analysis, but Depending on the application the user is not easy to choose.Sensor works according to Position Sensor the different sensors can be divided into electrical parameter sensors (including resistive, inductive and capacitive sensors), piezoelectric sensors, photoelectric sensors (including general photoelectric, fiber type, laser type and infrared type sensors, etc.), thermal sensors, semiconductor sensors, and radiated wave sensors. Most of these types of sensors respectively, based on their respective physical effect principle named.(2) the purpose of classification according to the sensorClassified by the use of sensors, such as displacement sensors, pressure sensors, vibration sensors, temperature sensors,sensors on people Crank Position Sensor use.3 categories according to the sensor materialIn recent years, research and development of the sensor material has greater progress, with the complexity of materials to create a more favorable performance of the sensor is one of the direction of future development.
1) semiconductor materialSemiconductor materials in sensor technology have a greater advantage. It has the sensitive nature of many of the amount of information, but also a mature integrated circuit technology, easy to implement multi-functional, integrated and intelligent, but also a good base material, it is ideal Crankshaft Sensor. Which is the most used silicon material. Silicon light weight, has a high strength to density ratio and stiffness to density ratio and therefore suitable for making sensors. In force-sensitive semiconductor silicon, thermal, photo, magnetic, gas, ion-sensitive areas and other sensitive components have wide applications.

Depending on the sensor material categories

In recent years, research and development of the sensor material has greater progress, with the complexity of materials to create a more favorable performance of the sensor is one of the direction of future development.
1) semiconductor material
Semiconductor Camshaft Sensor technology have a greater advantage. It has the sensitive nature of many of the amount of information, but also a mature integrated circuit technology, easy to implement multi-functional, integrated and intelligent, but also a good base material, it is ideal sensor material. Which is the most used silicon material.Crankshaft Sensor, has a high strength to density ratio and stiffness to density ratio and therefore suitable for making sensors. In force-sensitive semiconductor silicon, thermal, photo, magnetic, gas, ion-sensitive areas and other sensitive components have wide applications.

The future development trend of automotive sensor

technology is miniaturization, multi-functional, integrated and intelligent.Late 20th century, design technology, materials technology, especially Mems (micro electro mechanical systems) technology to make micro-sensor raised to a new level, the use of Crank Position Sensor to micron level sensor, signal processors, data processing device package on the same chip, it has a small, inexpensive, high reliability, and can significantly improve system testing accuracy. Mems technology can produce a test using mechanical quantity, the amount of magnetic, thermal capacity, chemical and biomass miniature sensors. As Mems tiny sensors in automotive electronic systems reduce costs and improve its performance advantages, they have begun to gradually replace traditional electromechani Engine Coolant Temperature Sensor. Mems Sensor will become the world's major automotive electronics components.

The importance of the sensor

Automotive sensors as automotive electronic control systems source of information is critical automotive electronic control system components, automotiveelectronic technology is one of the core areas of research. Automotive sensorsfotemperature, pressure, position, speed, accelerationandvibrationandotherinformationinrealtime, accurate measurement and control. Modern control system to measurethelevelof limousine key lies in its Crankshaft Sensor and level. Currently, an ordinarydomestic sedans are about a hundred sensors installed, and the number of Motor Sensors on luxury cars up to 200.Semiconductor integrated circuit technology over the years evolved from a microelectronic mechanical systems (MEMS) technology matures, the use of this technology can produce a variety of energy-sensitive and detect mechanical quantity, the amount of magnetic, thermal capacity, chemical and biomass Crank Position Sensor that size and energy consumption can be realized many new features, ease of mass production and high-precision, single-piece, low cost, easy to form large-scale and multi-array, ideal for use in automotive applications.Large-scale application Cooling Temp Sensor will not be limited engine combustion control and airbags in the next five to seven years, including the operation and management of the engine, the exhaust gas and air quality control, ABS, vehicle dynamic control, adaptive navigation, vehicle safety systems the application of MEMS technology will provide a vast market.

Introduction of performance ntc temperature sensor

ntc temperature  Position Sensor   generally consists of two or three kinds of metal oxides, clay mixed in a similar fashion, and in the high-temperature calcination furnace into a dense sintered ceramic. Oxygen link metal tend to offer free electrons. Ceramic is usually an excellent insulator. But only in theory, as the temperature approaches absolute zero, the thermal resistance of ceramic is this situation. However, when the temperature is increased to the range of the more common, more and more thermal excitation will throw the free electrons. With many electron carriers through the ceramic, the effective resistance is reduced. Resistance variation with temperature is extremely sensitive. Typical variation for each degree Celsius decrease (-) 7 [%] to 3 [%]. Then use a wide temperature range suitable for any Crankshaft Position Sensor  is the most sensitive.
Nominal temperature resistance depends on the resistivity of the base material, the size and geometry, the contact area of ??the electrode. Thick narrow thermistors have relatively high resistance, the shape is thin and wide to have lower resistance. Actual size is also very flexible, they can be small or too small a diameter of .010 inches. Virtually no limit to the maximum size, but usually for half an inch or less.

ntc temperature sensor applications

Medical Applications: normally takes in digital thermometer, training (thermostat) box, skin Cooling Temperature Sensor , catheters, dialysis equipment and respirators in use ntc temperature sensor to monitor temperature, blood flow or airflow.
Appliance Applications: general use in a variety of packaging glass packaging sheet to monitor and control the oven, microwave, washer and dryer, dishwasher and small appliances - toaster, blender, hair dryer, curling tongs, Shower , air conditioners, stoves, refrigerators, refrigerator temperature and monitor rechargeable nickel-cadmium batteries and NiMH battery temperature, for cordless power tools and appliances, camcorders, portable CD player / radio for charge control .
Automotive applications typically use discs, wafers or glass packaging Uni-Curve? Products for temperature monitoring and control of air flow and immersion applications. These devices typically are used as intake  Cooling Temp Sensor , batteries, engine and transmission temperature sensor, air conditioning, and internal / external ambient temperature Motor Sensors , and an oil and gas level sensor.
Office Automation / data processing applications typically use ntc temperature  Engine Temperature Sensor for strapping, overhead projectors, color printers, copiers, central processing unit (host), temperature monitoring and control of power, as well as laptop computers, personal manager and other battery-powered portable device uses a rechargeable NiCad and NiMH battery charge control.
Ntc telecommunication applications generally use a temperature sensor for temperature compensation or the use of glass packaging laminates for temperature monitoring and control. Typical applications include switching devices, and cordless phones, radio, pager rechargeable NiCad and NiMH batteries for charging control.
Military / aerospace applications require the use of precision sheet or glass bead assembly to monitor aircraft, satellites, ground-based radar, manned deep space orbiter and sounding rockets temperature