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1、轻骑太子125摩托车电路分析及检修（Analysis and maintenance of Qingqi Taizi 125 motorcycle circuit）Analysis and maintenance of Qingqi Taizi 125 motorcycle circuitWen / Liu FanThe 125 is South Koreas Hyosung Corp with Qingqi Prince American style American motorcycle production, then Qingqi Group named kylin Prince 12
2、5 type motorcycle. It is an American style Korean crown prince car. Hyosung Corp motorcycle mainly adopts the Japanese SUZUKI companys technology, engine start, clutch, speed change, most parts and SUZUKI Wang 125 the same. The high handlebar of this car can reduce the fatigue of the journey, plus t
3、he storage capacity of the tank is larger, especially suitable for long-distance driving. The carburetor is provided with an accelerating pump, and the acceleration performance is obviously improved. In order to meet the requirements of maintenance personnel and users, the circuit part of the vehicl
4、e (shown in Figure 1) is divided into blocks, and its circuit analysis is carried out.I. electric starting system, ignition system, power supply and charging system (shown in Figure 2)1. The working process of the electric starter systemStart by electric locks, start switch, start relay, starter mot
5、or, battery and mechanical part. Electric start working process: will switch to the ON position with a key, start switch (relay control circuit connected to a relay (contact) circuit connected to) a motor startup (gear shaft rotate and drive gear combination) a one-way clutch function of a magnetic
6、rotor running a rotating piston moves up and down.Magnet motor rotor rotation, the rotor outside the ignition trigger ignition coil and the rotor in induction charging coil, generating charging coils on the stator of the electric induction by three yellow (Y) color line into the rectifier, and then
7、through the pressure regulating rectifier for electric lighting and signal system use (or DC battery charging).2. Ignition system working processIgnition charge induction electric ignition coil for production (capacitor), the rotor outside triggering induction coil produces through conductance (cont
8、rolled ignition, wow) the ignition primary coil discharge on high voltage coil, and secondary coil in high voltage coil in high pressure, eventually induces a spark in a spark plug that will start the process of combustible mixed gas inhalation and compression ignition, power, and exhaust of the eng
9、ine into the working state.3 、 power supply and charging processThe engine into the working state, the magnetic rotor (stator) in low magnetic charging coil cutting in a rotating magnetic field generated in alternating electric induction, the rectifier, DC power system into the power supply (excess
10、power into the battery into chemical energy stored up). The lighting and signalling systems are all DC power supplies.Magnetic motor (outside) of the ignition charge coil (ignition coil) has been responsible for the ignition of charging and ignition, the high voltage coil continuously produce spark
11、in a spark plug, ignite combustible mixture in cylinder, the engine continues to work continuously.When the engine has stopped working, the battery is powered individually by the battery. The tachometer of the car is electronic, and the outlet of the tachometer is respectively connected with the ign
12、ition component and the power supply. The number of the ignition pulses is converted to the speed indicating the speed of the tachometer.This lock within four wiring, BR and RB were second connected (on line BW) as for flameout. The other two (red, orange) lines are power switches.Two, night lightin
13、g system (shown in Figure 3)Night lighting system composed of lights, power supply, electric lock, headlight switch, headlamp and instrument etc. The night lighting system for this vehicle is powered by DC, and the system works regardless of whether the engine is working or not. When the engine work
14、s, the alternating current generated by the magneto is rectified and converted into direct current to supply power to the lighting system. When the lock, the headlight switch control lamp light on light, light, light in the car on the odometer, and low speed can be connected to the.Three, signal sys
15、tem (shown in Figure 4)1. Brake lightBrake is divided into front and back brake, front brake is hydraulic brake, and rear brake is drum brake. When stepping on the brake device, the brake switch is switched on and the brake light is on.2, gear indicatorThe gear indicator is controlled by the gear sw
16、itch. The stop switch has moving contact and static contact. The movable contact is installed on the speed change cam and rotates together, when the neutral position is moved, the static and static contact is switched on, and the neutral light is lighted. Neutral position is usually used in start-up
17、 and other traffic signals.3 fuel indicating deviceThe fuel indicator is composed of a fuel tank, a float assembly, and a fuel meter. When 1/2 fuel is left in the fuel tank, the 1/2 fuel light in the tachometer is lit; when the fuel oil in the fuel tank continues to drop to the spare tank, the E lig
18、ht is lit. The 1/2 fuel light starts from the remaining 1/2 of the fuel tank and remains lit until the remaining 1.8L is in the tank. The fuel tank is 1.8L in volume.4, horn and switchWhen the horn switch is connected, a loop is formed, and the horn rings.5. Steering gearThe power switch on the igni
19、tion lock switch when the steering flasher, persistent after forming a loop side of the steering lamp and steering indicating lamp work.Four 、 common faults of electrical system(1) common faults of foot start and electric start;1. Electrical aspects. Electrical startup process, as mentioned above, c
20、ommon faults are battery deficit, check voltage regulator and battery level. When the battery is short of power, it should be charged in time, fill in the battery, adjust the voltage regulator and start the relay (the working conditions can refer to the following technical parameters), damage should
21、 be replaced.2, mechanical aspects. The work process described above. Common failures are small compression pressure in the cylinder, due to excessive wear or leakage, should be replaced parts or inspection. Check whether the joint of the one-way clutch and gear is worn or damaged. If damage is foun
22、d, replace it.3, gas distribution. The intake part works as follows: carburetor, intake valve, combustion chamber. Exhaust part of the work process: combustion chamber - exhaust valve - muffler. Common faults are caused by intake valve opening hours less (or exhaust resistance); valve opening hours
23、caused less intake (or high resistance of exhaust); the valve is not tightly closed when the leak caused, the compression pressure decreases; the carburetor has fault caused by the concentration of the mixed gas is not suitable; muffler blockage caused by poor exhaust. Should be high-speed maintenan
24、ce carburetor or replace the muffler. Adjust valve clearance time, clearance value is 0.08-0.13mm. The carburetor float height is 19 + 1mm. Check the intake and exhaust door cam height limit of wear, intake cam height is 33.88mm, exhaust cam height is 33.03mm.4, ignition lines. The working process o
25、f ignition circuit is:Charging circuit: ignition lock - ignition - ignition coil - spark plug.Ignition charging and discharging circuit: magneto (internal and external charging and trigger coils) - ignitor - high pressure package - high voltage line - high pressure cap - spark plug.Common faults: sp
26、ark plug damage or carbon deposition, spark plugs should be replaced and carbon removal. When the contact between the electrical components is not good, it should be adjusted to the joint firmly. Foot start bad in addition to the foot start mechanical transmission system is concerned, but also with
27、the above 2-4, three aspects.(two) common troubles of lighting systemThe lighting system works in turn: magneto, voltage regulator (or battery - fuse) - ignition switch - headlamp switch - near - far light switch - display device (light bulb).The common faults of lighting system are: the light bulb
28、is not bright, the bulb and the headlamp are dim. If the light bulb is not lighted, check whether the lighting line is broken or not; the switch is in good contact; if the light is dim and the bulb is burned, check the voltage regulator or check whether the battery is defective or refer to the param
29、eters of the back regulator.(three) the signal system sees faultsSpeakers do not sound or sound is low, mainly due to improper horn adjustment, battery power loss, circuit breakers and short circuits. Turn lights do not flash common phenomenon is another bulb bad, bad and bad flasher.Five, electrica
30、l components testing and technical parameters(1) inspection of magneto and ignition components;1. The stator coil resistance is 0.5-1.5 ohms (measuring three of the two yellow lines with a multimeter).2. Ignition charging coil: coil I is 320-360, coil II is 490-550 (red line / black line).3. Ignitio
31、n trigger coil (outside rotor) is 90-150 (green / white).4, high pressure package (or ignition coil): the primary is 0.5-1.5, the second line is 4.7-5.57k.5. The igniter is checked as shown in table 1.When the above test result does not conform to table 1, the parts must be replaced when the resista
32、nce is infinite or smaller than the specified value.(two) inspection of accumulator and voltage regulating rectifier;1. When the ambient temperature is 20 degrees centigrade, the relative density of the electrolyte is 1.28, and the current limit of the tube is 15A. When the electrolyte relative dens
33、ity hours, indicating insufficient electricity, should be charged, the maximum charging current of 0.9A. Check the battery voltage, normally at 13.5-13.8V, otherwise it should be charged.2, the voltage regulator, such as the resistance value and table 2 does not match, should be replaced.(three) rel
34、ay and other electrical components inspection;1, relay inspection, first measuring the red line (thick line) and grounding wire insulation. Then the battery is connected to the YG terminal and the negative electrode is connected to the ground wire. Check whether the red line (thick wire) is connecte
35、d to the ground wire.If it is not switched on, the relay (relay YG- and ground resistance 3-4) shall be replaced. Note that when the relay is applied, the voltage should not exceed 5S, and the time relay is overheated, which will cause the coil to burn out.2 、 motor(1) the easiest way to start the m
36、otor is to damage the carbon brush. Wear over (length limit 3.5mm) or fragmentation will start the motor does not turn or not caused by operation to buy original, such as brush, can substitute carefully grinding to the required size, and then welded to the brush frame and cathode mounting bracket. W
37、hen installing, the carbon brush rack and the positive electrode mounting bracket can be first put on. When installing, you can remove the carbon brush spring first, and then install the spring when the rotor, carbon brush and carbon brush rack are installed.There are assembly marks on the shell of
38、the starting motor, and the markings must be aligned with each other when installing.(2) the surface of commutator is dirty, and the starting performance will decrease. You should use 400 or similar quality sandpaper commutator off dirt, clean dry cloth to wipe with polished commutator. Check the di
39、mensions between the commutator segment and mica (size limit is 0.5mm).(3) check the armature coil: when the coil is found open or grounded, replace the armature. Check method: use pocket tester (DMM) will be provided from the surface of the commutator brush, commutator segments and by each rotor co
40、re (for open circuit test), the amount of coil placed pen, open circuit or grounding test.(four) other technical parametersNo-load voltage of magneto: 70V (AC) /5000 (r/min);Voltage after adjustment: 13.5-16V/5000 (r/min);Battery type: 13M8-3B (12V, 8A.h);Spark plug: D8EA, X24ES-U, A6YC.How to find
41、out the trouble of motorcycle ignition circuit quickly.table=98%trtd=2,1 under normal temperature conditions (above -5 DEG C), the motorcycle engine can not start normally when it is started at 13 times, indicating that there is a fault. There are two aspects of its failure, that is, the so-called o
42、il circuit or circuit (not discussed here because crankcase, cylinder leakage and pressure is not enough, piston ring wear and tear and other reasons). The oil circuit fault is easy to find, as long as the oil system is not blocked, the carburetor work properly, fuel, and the quality meets the requi
43、rements, you can think that the oil circuit is basically no fault. The circuit fault is difficult to find, and the engine can not start immediately. Most of them are caused by the malfunction of the electric fire circuit. Here are the steps and methods to quickly and accurately find the fault point
44、of the circuit.First unscrew the spark plug, let six nut of the spark plug near the cylinder from about 58 mm, and let the spark plug skirt in front of our eyes, that our eyes can see the center of the spark plug electrodes inside the space part. Start the engine several times, there are four cases:
45、 1., spark plugs and cylinder block between 58 mm long spark, and can hear discharge sound. Sparks are also produced in the gap of 0.7 mm between the center plug of the spark plug and the side electrode. This situation indicates that the high voltage ignition circuit is normal. If the engine still f
46、ails to start, check that the ignition advance angle is correct. If the ignition advance angle is correct, then the high voltage ignition system is not fault, that is, the circuit part is no fault. Then you should consider the reasons why the engine does not start from the oil circuit or other parts
47、. 2. there is a 58 mm spark between the spark plug and the cylinder body, but there is no spark between the central electrode of the spark plug and the side electrode, and there is spark in the inner space of the central electrode. This situation shows that the high voltage ignition circuit is norma
48、l, but the spark plug is seriously coke or the spark plug insulator is broken. With a new spark plug, the engine will start. 3. spark plugs and cylinder generated between the length of less than 58 mm, only 23 mm. Check the gap of the platinum contact of the breaker first. If it is between 0.250.5 m
49、m, it should be regarded as normal (usually adjusted according to the regulation in the product manual of the factory). Then with a fine emery cloth polishing contact ten, and then a clean cloth dipped in petrol wipe contact surface. Then, start the engine several times and carefully observe the spark gap betwe