Geely MR479Q Manual
                                                                                                                                                                                                      | |
Contents
| 
Table 28Fig. 373 Control circuit of the ignition coilFig. 372 Ignition coil1. Shielded cable 2. Permanent magnet 3. Casing of the sensor4. Install support 5.Soft magnetic core 6.Coil 7. Air gap 8.Toothring with reference mark6. Speed sensor (Fig. 371)The soft magnetic core of the sensor surrounded by a coil is installedopposite to a pulse toothed ring, leaving a narrow air gas betweenthem. The soft magnetic core is connected with a permanent magnet,and the magnetic field extends up to the ferromagnetic pulse toothedring. When the tooth of the ring is just opposite to the sensor, themagneticfield is concentrated to intensify the magnetic lines of the coil.When the backlashes are opposite to each other, the magnetic fieldweakens variation of the magnetic field. When thetoothed wing rotateswith the wheel, these two conditions alternate. Such changes ofmagnetic lines will generate an induced AC voltage in the coil, with itsfrequency depending on the speed. Refer to Table 28 for the technicalparameters of the speed sensor.7. Ignition CoilStructure of the ignition coil: The ignition system adopts a double ignition coil, and its form and circuit are shown in Fig.372. and Fig. 373.Operating principle of the ignition coil: The two ignition coils directly controlled by the computer generate a high voltagealternatively. The secondary side of either ignition coil is connected to the spark plugs of the two cylinders, so that thespark plugs of the two cylinders spark simultaneously each time. Of course, only one cylinder has an effective ignition,while the other cylinder has an ineffective ignition in its exhaust stroke. In such a high voltage distribution method, despiteof loss of a certain ignition energy due to ineffective ignition, the structure of the ignition system is simplified throughomission of the distributor, and the reliability of ignition is enhanced. Refer to Table 29 for the technical parameters.Fig. 371 Schematic Diagram of the Speed SensorComputerTechnical Parameters of DG6 speed sensorIgnition coilWinding resistance Rw (+20°C)Winding inductance L (1kHz, serial circuit)Air gap SSignal voltage UsOperating temperature (outside the winding)770-950Ω370±50mH1.8±0.01>1750mV-40°C~ +150°C189 |
manualsdatabase
Your AI-powered manual search engine