The electromagnetism application on the car

1 relay relay is automata circuit middling one kind when use yuan of parts of an apparatus, it belongs to the category of switch, it is the recloser that one kind can use small electricity or low voltage controls big electric current or tall voltage. The sort of car relay is pressed normally state branch is relay to often leave (NO) relay, often shut (NC) relay and often leave, often shut mix model relay. Relay applies extensively in system of car circuit control, it has the effect such as automata, self-adjusting, safe protection in circuit, cent controls relay for functional relay and circuit two kinds. Common car turns to the lamp, rain to blow implement use functional relay namely. And circuit control relay is pure use at circuit to be connected with changeover, reduce the voltaic negative charge of switch, prevent overload and burned-out circuitry and the equipment that use phone, protective switch contact not by ablation, with the small electric current that sheds classics switch control uses the big electricity of electric equipment. This kind of relay is common on the car have: Clutch of electromagnetism of compressor of power source relay, headlamp relay, fog lamp relay, starter relay, horn relay, air-blower relay, air conditioning. Of relay of car electromagnetism type detect method: (often use digital type avometer to measure) 　 　 1) detect the resistance of electromagnetism coil: Hit avometer slotted line of shelf of R × 1K to encircle resistor, if block value arrives in a few Europe between hundreds of Europe, it is normal to be belonged to. If be measured,the resistance of electromagnetism coil is relay infinity, the coil that shows this relay already open circuit attaint. If be measured so that the resistance calibration of coil often is worth small or it is almost 0, it is coil interior has short circuit trouble. 2) to 3 lines relay, give car relay coil winding 84 with 84a date terminal (grade sees car relay wiring column mark and meaning) receive 12V volts d.c. , hear electromagnetism coil is sucked combine sound, the coil share that shows relay is normal, measure with digital type avometer 84 with 84b terminal connect, it is normal that in relay electrify sucks these two terminals in the course that combine to be connected, explain this relay is normal. 3) if 4 lines, 5 lines, 6 lines are mixed 8 lines relay, give car relay coil winding 85 receive 12V volts d.c. with 86 terminal, hear electromagnetism coil is sucked combine sound, the coil share that shows relay is normal. To 4 lines relay, measure with digital type avometer 87 with 87a terminal or 88 with 88a terminal connect, it is normal that in relay electrify sucks these two terminals in the course that combine to be connected, explain this relay is normal. To 5 lines relay, measure with digital type avometer 87 with 87a, 87 with 88a of these two groups of switch connect, in relay electrify sucks these two groups of switch after closing one group connects a group to break, two switch after relay disconnects are connected contrary, explain this relay is normal. To 6 lines and 8 lines relay measurement technique is same, here no longer give uncecessary details. 4) the wiring column date of some cars relay somewhat difference, but the principle graph of relay and wiring column date can imprint in relay on plastic outer covering, the principle graph that goes up with objective is measured to allow. Attention: Relay of a lot of cars has protective element on winding of in-house and online circle, some and is resistor, some and is diode, if Beijing is contemporary,planted agent encircles the lamplight relay of car of Yi Lan spy winding go up and is diode. When the car relay that measure and has diode, scarcely can increase 12V tension instead, otherwise 12V power source is met a protective diode is retrorse puncture, bring about relay to cannot work normally, can cause other vehicle failure even. 1.

The ignition coil on car of 2 electrons igniter is the high pressure that turns depression into number volt in order to realize ignition, its working principle is similar to common transformer, because the v/LIT all over the ground number of primary coil and secondary coil is very larger than having,basically be difference. But the working way that the working way of common transformer encircles unlike ignition line however: Common transformer is successive job, and ignition coil is discontinuous job, it according to engine rotate speed differ to store repeatedly, release energy, in the instantaneous generation that release very powerful energy makes secondary coil obtains taller voltage. Car electron igniter is general controlled at engine computer, engine computer basis outputs pulse signal after the signal computation of relevant sensor, judgement, send the primary winding of igniter, arrive through transformer step up next several bend over, add to sparkplug to make its two class flash over, achieve light the end that air mixes inside firebox. Sheet is used on commonner now high speed gasoline engine piece machine pilot ignition system, also call a number type electronic-controlled ignition system, this kind of ignition system is carried out by all sorts of car computer, sensor and ignition implement 3 parts composition. Benzine eject and ignite these two device get same a control of ECU, operable a group of sensor. Deflagrate among them sensor is electronic-controlled ignition appropriative a very important sensor (the motor that used device of pressure boost of waste gas turbine especially) , it can monitor engine to have without deflagrate and deflagrated degree, make as feedback signal ECU dictates implementation ignition shifts to an earlier date, make engine won't deflagrate can achieve taller combustion efficiency again. 1.

The application of sensor of type of electromagnetism of sensor of 3 electromagnetism type on the car is more, be like annulus fast sensor, crankshaft position sensor, camshaft position sensor have application. Electromagnetism type sensor is main by signal rotor, pass feeling coil, permanent magnet, guide magnetism magnetism yoke is comprised. Its job principle. When signal rotor rotates, the air gap in magnetic circuit produces periodic change, magnetoresistive and the flux that cross signal coil magnetic head are periodic also change, the induction in coil goes out join the electromotive force that change. Signal rotor every had turned tine of a protruding, those who produce a cycle is meet hand in in sending feeling coil change electromotive force, namely electromotive force appears maximum and the least value, sensor coil also is handed in with respect to accordingly output change voltage signal. Rotate speed is higher, rate of magnetic flux change is older, the inductive electromotive force in sending feeling coil is taller also. Air gap size is designed commonly for 0.

2mm-0.

4mm. The rotate speed of engine is electronic-controlled one of important parameter in the system, use electromagnetism type sensor generally, small controller can be calculated accordingly the time that gives the crankshaft below different rotate speed to turn to need for a time and its ignition shift to an earlier date horny position. 1.

A powerful person of electromagnetism of car of 4 electromagnetism a powerful person is the executive component of electronic control system. The sort of electromagnetism a powerful person is more, a powerful person of electromagnetism of pressure boost adjustment, bypass enrages recycle of a powerful person of electromagnetism of switch electromagnetism a powerful person and scale, waste gas to control a powerful person of electromagnetism of electromagnetism a powerful person, vacuum to wait, there also is more electromagnetism a powerful person inside automatic gear-box. By its action can be divided to shift gear electromagnetism a powerful person, the lock stops electromagnetism needle and pressure regulating electromagnetism needle. By its working way cent is a powerful person of switch type electromagnetism and a powerful person of pulse type electromagnetism. The principle of each electromagnetism a powerful person is basic and same. The applied example that electromagnetism of 2 last words concerns to go up in the car is very much, adjust window of electric machinery, car like seat of pump of starter of car dynamo, car, gasoline, steam the pace inside fast electric machinery, appearance takes air-blower of electric machinery, air conditioning, slack electric machinery is waited a moment. Here does not do one by one to discuss, as the technology update ceaselessly, electromagnetism and relevant theory will more and more to the car using, make a car main thereby the raising that the engine control system of function, chassis control system gets comfortable sex, convenient sex, make the basic function of the car more and more intelligence is changed, give a life to bring to us easier. CNC Milling