As we all know, the starting of the engine needs the support of external force, and the car starter is playing this role. The starter can convert the electrical energy of the battery into mechanical energy and drive the flywheel of the engine to start the engine.

Generally speaking, the starter uses three parts to realize the entire starting process. The DC motor introduces the current from the battery and makes the drive gear of the starter produce mechanical movement; the transmission mechanism meshes the drive gear into the flywheel ring gear, and can automatically disconnect after the engine is started; the starter circuit is turned on and off by an electromagnetic switch To control. Among them, the motor is the main component inside the starter. Its working principle is the energy conversion process based on Ampere's law that we are exposed to in junior high school physics, that is, the force of the energized conductor in the magnetic field. The motor includes the necessary armatures, commutators, magnetic poles, brushes, bearings and housings.

a:

1. After turning on the start switch, the starter rotates at a high speed and the engine crankshaft does not respond. This phenomenon indicates that the fault occurred in the transmission mechanism of the starter, which may be caused by the wear of the transmission gear or the single-way clutch.

2. The starter cannot work normally and the drive gear does not rotate. There are many reasons for this phenomenon, such as problems with the power cord, ablation of the contact plate of the starter switch, and excessive engine resistance, and so on.

3. The power output of the starter is insufficient to drive the crankshaft. Short-circuit of the excitation coil and loss of battery power can cause insufficient power of the starter.

4. The running sound of the starter is harsh. This may be caused by the blocking of the one-way clutch or improper installation of the starter.

5. There is a "click" sound when the starter is switched on and off, but it does not work. This phenomenon can be caused by keeping the coil disconnected or the battery is seriously deprived of power.

Maintenance recommendations:

The starter is a valuable part of the car and will not be easily damaged. However, in order to prolong the service life of the starter, proper use is also necessary. In the process of starting the engine, the starter needs to introduce 300~400 Ah of electricity from the battery. Therefore, in order to prevent the battery from over-current or damage, the starting time should not exceed 5 s; in winter, it is easy to start difficult phenomenon, many times Each start time should not be too long when starting, and there should be a proper interval between each start.