Nanjing Iveco light car power supply, start circuit diagram

(4) Power supply, start-up, and warm-up (as shown in Figure 2, Figure 3)

The negative pole of the battery 20000 is grounded by the manual switch 52600, the battery model is 12V88Ah (or 12V110Ah), the positive pole is connected to the central junction box 75000 via the electromagnetic power main switch 25900, and the other main line is connected with the starter 08000, the alternator The 03000 fire line is also pulled out from the generator B+ column and also connected to the positive battery. Therefore, as long as the manual power main switch 52600 is turned on, the battery can be directly charged to the battery when the generator is working, and whether the charging is normal is displayed by the charging indicator 58100 on the instrument panel.

It can be inferred from the figure that the alternator is an integral alternator with a built-in hybrid integrated circuit regulator. The charging indicator light is extinguished when the output voltage of the excitation diode is close to the potential difference of the battery after the generator is normally powered. The generator has a normal working voltage of 14V, an output current of 45A, and a power of 650W.

The ignition switch 52502 is divided into two parts on the drawing. Like the general ignition switch, it is divided into STOP, normal operation (MAR, including preheating), and starting (AVV) three gears. In normal operation, the ignition switch is connected to the entire vehicle's large county distributor (see Figures 19-10, 19-11, 19-12, 19-13, 19-14, 19-16).

In order to increase the reliability of low temperature start-up, Iveco light-duty vehicles use a large-power (12V, 2.5kW) starter and a maintenance-free thin-plate battery (88Ah battery, maximum starting current is 395A; 11OAh battery, maximum starting current) Up to 450A), and also a preheating system with a flame ejector on the engine's helium manifold. Its warm-up and start-up timing is driven and displayed by the electronics controller.

The flame spray preheater uses electric energy to heat the flame ejector to ignite the diesel fuel, forming a flame to heat the air of the engine intake manifold, thereby improving the low temperature starting performance of the diesel engine.

The system consists of an electronic control box 47105, a water temperature sensor 47105a, a flame ejector 19005, a solenoid valve 78000 (control pre-warmed diesel) and the like. The electronic control box can automatically control the working state of the flame ejector on the intake manifold according to the water temperature of the engine. The driver can grasp the preheating indicator 58101 to know when it is suitable for starting.