The sensor type and function

The sensor type and function: air flow meter - measurement of engine intake air, the signal input ECU. 2. Intake absolute pressure sensor - measuring the gas intake pipe absolute pressure, the signal input ECU. 3. Throttle position sensor - opening degree and the throttle opening degree detecting changes in the signal input ECU. 4. Camshaft position sensor - provide a crank angle reference position signal. 5. The crankshaft position sensor - detects the crank angle displacement, providing engine speed signal to the ECU and the crank angle signal. 6. Intake air temperature sensor - detects intake air temperature signal. 7. Coolant temperature sensor - to provide ECU coolant temperature signal. 8. The vehicle speed sensor - with speed detection of the car, providing a vehicle speed signal to the ECU (SPD signal). 9. Oxygen sensor - detects the oxygen content in the exhaust gas. 10. Knock sensor - detects whether gasoline engine knock and knock intensity. 11. Air conditioner switch - When the air conditioning switch is turned on, air-conditioning compressor, the engine load increased when the air conditioner switch the input signal to the ECU. 12. Position switch - when the automatic transmission from neutral into other files linked to the ECU input signal. 13. Startup Switch - When the engine starts, a start signal to the ECU. 14. Brake light switch - brake, provide braking signal to the ECU. 15. Power steering switch - when the steering wheel to the left from the neutral position, since the power steering oil pump of the engine load increase, this time to the ECU input signal. 16. Cruise control switch - when the state enters cruise control, cruise control status to the ECU input signal. Role injector: is the high-pressure fuel injection pump discharge analogs like injected into the cylinder, in order to facilitate the combustible mixture. Igniter: means to provide sufficient energy to ignite the pulverized coal, oil (gas) in the moment of fuel and means to stabilize the flame. Igniter stoves have commercial and residential furnaces of stars: Commercial catering kitchen stoves are mainly used in ignition system installed because of the use of catering kitchen environment is more complex, so choose civil stringent requirements are relatively lighter. Civil mainly used in household appliances ignition system installed, use environment is relatively simpler than the restaurant stoves, help choose pulsed ignition more. A knock sensor: a closed-loop control system is used to detect the cylinder automobile engine knock intensity. Once the detonation occurs is notified ECU retard the ignition and turn the ignition timing to adjust the ignition timing. Mounted on the cylinder of the engine knocking special test conditions to the ECU ignition timing signal adjustment. The main component is a piezoelectric ceramic crystal, screw so that the inertia of the counterweight pressing a piezoelectric ceramic crystal film. When the detonation, deflagration pressure wave through inertia weights piezoelectric ceramic crystal plate compression, producing a much larger than the non-knocking voltage signal. In order to avoid false positives due to interference caused by the ignition timing is set according to a determination zone. Knock sensor for detecting whether the engine knocks, when the engine knock occurs, the sensor will produce corresponding electrical signals, and fed to the electronic controller, the electronic controller to eliminate engine knocks by delayed ignition method. There are piezoelectric and magnetic-electric types. 2 Oxygen Sensor: the fundamental role of the oxygen sensor is used to detect the exhaust gas oxygen concentration, and ECU (engine control computer system) oxygen concentration signal supplied by the oxygen sensor to determine the engine's combustion conditions (before oxygen) or catalytic converter efficiency (after oxygen). 3 speed sensors: speed sensor means of an induction coil, speed value obtained by detecting the pulse gear hub, which generates an AC voltage signal of the magnetic field, then people lose control of the computer to go to the ABS. ? 4 Coolant Temperature Sensor: can detect the temperature inside the engine, the average car has a thermostat, the temperature has been controlled at 90 degrees, which is the optimum operating temperature of the engine intake air temperature sensor 5: intake air temperature sensor: Detects intake air temperature, to the ECU as a basis to calculate the air density; 6 crankshaft position sensor: determines the position of the crankshaft, which is the crankshaft angle. It is usually with the camshaft position sensor work together - to determine the basic ignition timing. 7 Camshaft position sensor: OK throttle opening to ensure that the ignition timing when the crankshaft position sensor failure can be short-term emergency ignition 8 throttle position sensor; throttle position sensor, also known as throttle position sensor or throttle switch. Its main function is to detect the engine is in the idle condition or load conditions, is accelerating or decelerating condition condition. 9 intake absolute pressure sensor: ?? intake pressure sensor detects the festival, the intake manifold absolute pressure valve behind, it changes within the manifold absolute pressure based on engine speed and load size detection, and then converted into a signal the voltage supplied to the electronic controller (ECU), ECU according to the size of this signal voltage, controls the basic fuel injection quantity of size. ?? More types of intake air pressure sensor with piezoresistive, capacitive, and so on. Since the piezoresistive have fast response time, high precision, small size and flexible installation, etc., which are widely used in D-type injection system 10 air flow meter - primary role is to measure how much the engine intake air quantity.