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The number of blades of the trigger impeller is equal to the number of cylinders, the upper part of the trigger impeller is sheathed with a distributor, and the distributor rotates with the trigger impeller. The Hall sensor 4 consists of a permanent magnet 3 with a guide plate (magnetic conduction) and a Hall integrated block 2, and triggers the blades of the impeller 1 to rotate between the Hall integrated block 2 and the permanent magnet 3. The Hall integrated block 2 includes a Hall element and an integrated circuit. When the Hall signal generator works, the Hall voltage Uh generated by the Hall element is mV level, and the signal is very weak, so it needs to be processed. This task is accomplished by integrated circuit, so that the Hall voltage Uh signal generated by Hall element will be amplified and pulse-shaped, and finally output as a neat rectangular pulse (square wave) signal Ug. 3D Network Technology Forum +t5 K9 J! s 1h)o E； z4 B
. U9s (j/}/z 'n8o% Q6V Hall signal generator is an active device, which needs power supply to work. The power supply of Hall integrated block is provided by igniter. The collector of the output electrode of Hall integrated circuit is in the form of open circuit output, and the load resistance of the collector is set in the igniter. The Hall signal generator has three wires connected to the igniter, one is the power input wire (red and black wire), the other is the signal output wire (green and white wire) and the other is the ground wire (brown and white wire). The three-wire sockets in the housing of 9J Hall signal generator are marked with "+","0" and "-"symbols respectively.
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When the distributor works, the blades rotate with the distributor shaft. Whenever the blade enters the air gap between the permanent magnet and the Hall element, the magnetic field in the Hall integrated block is bypassed (or magnetically isolated) by the blade of the impeller. At this time, the Hall element does not generate Hall voltage, the triode of the output electrode of the integrated circuit is in the off state, and the signal generator outputs high potential. When the blade of the trigger impeller leaves the air gap, the magnetic relaxation of the permanent magnet forms a loop through the Hall integrated block and the guide plate. At this time, the Hall element generates a Hall voltage, the triode of the output electrode of the integrated circuit is in a conducting state, and the signal generator outputs a low potential. The distributor shaft rotates once and outputs four square waves. From top to bottom, the rotation direction of the trigger impeller is clockwise. When the trailing edge of the impeller slot rotates so that the end face of the magnetic pole is only half exposed, the voltage at the signal output terminal instantly jumps from low potential to high potential, which is the ignition time.
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The Hall igniter is connected with the signal generator through a two-wire plug. When the signal output terminal inputs the signal into the ignition controller, it controls a high-power triode after being processed by its internal circuit, and then controls the ignition coil, so that the high-voltage output terminal of the ignition coil outputs a high-voltage pulse to ignite the spark plug. Hall igniter is essentially an electronic switch, which is controlled by the signal voltage generated by Hall sensor. The ignition controller also has the function of automatic power-off when stopping to protect the ignition coil from being burned out. In addition, the ignition controller also has the function of current limiting control. When it is detected that the current value in the ignition coil is less than 94% of the rated value, the control circuit increases the rising rate of the current before the input signal is converted to a low level to ensure that the primary coil generates sufficient magnetism. 3D |cad| Machinery | Automobile | Technology | CATIA | Pro/E | UG | Inventor | SolidEdge | SolidWorks | CAXA,]&; }) \: v( r( i$ o Q/ s
* ~; A $ p! The closing angle control function of Y( R( p( a0 R, N" q)) three-dimensional network technology forum can constantly adjust the closing angle according to the engine's working speed, power supply voltage and the performance of ignition coil, so that the on-time of the primary circuit remains basically unchanged within the engine's working speed range, so that the engine has enough ignition energy and voltage at high speed to avoid fire. At low speed, the service life of ignition coil and ignition electronic components will not be affected by overheating. Compared with magnetic induction electronic ignition device, Hall electronic ignition device can output stable ignition signal even when the engine speed is very low, because the amplitude waveform of the ignition signal output by its ignition signal generator is not affected by the engine speed, so it has good low-speed performance and is beneficial to the engine starting. Moreover, the Hall ignition signal generator can output a square wave signal with a certain high-low level time ratio under any working conditions, so the ignition timing is accurate and easy to control. In addition, the Hall ignition signal generator does not need to be adjusted and is not affected by dust and oil pollution, which makes the Hall electronic ignition device more reliable in working performance and longer in service life.