How does the air conditioning electromagnetic clutch work?

The clutch is divided into three working states, that is, the full linkage of the clutch is not depressed, the semi linkage of the clutch is partially depressed, and the non linkage of the clutch is depressed. When the vehicle is running normally, the pressure plate is tightly pressed against the friction plate of the flywheel. At this time, the friction between the pressure plate and the friction plate is the largest, and the input shaft and output shaft maintain relative static friction, with the same speed. When the vehicle starts, the driver steps on the clutch, and the movement of the clutch pedal pulls the pressure plate back, that is, the pressure plate is separated from the friction plate. At this time, the pressure plate does not contact the flywheel at all, so there is no relative friction.

The last one is the semi continuous state of the clutch. At this time, the friction between the pressure plate and the friction plate is less than the full linkage state. The friction plate on the clutch pressure plate and flywheel is in a sliding friction state. The speed of the flywheel is higher than that of the output shaft, and the power transmitted from the flywheel is transmitted to the gearbox. At this time, the engine and drive wheel are equivalent to a soft connection state.

Generally speaking, the clutch plays a role when the vehicle starts and shifts gears. At this time, there is a speed difference between the first and second shafts of the gearbox. The synchronizer can keep the speed of the first shaft synchronized with the second shaft only after the power of the engine is cut off from the first shaft. After the gear is engaged, the first shaft is combined with the engine power through the clutch, so that the power can continue to be transmitted.

In the clutch, there is also an indispensable buffer device, which is composed of two discs similar to the flywheel. The disc is provided with a rectangular groove, and the spring is arranged in the groove. When encountering fierce impact, the springs between the two discs act elastically to cushion the external stimulus. Effectively protect the engine and clutch. Among the accessories of the clutch, the strength of the pressure plate spring, the friction coefficient of the friction plate, the clutch diameter, the position of the friction plate and the number of clutches are the key factors to determine the clutch performance. The greater the spring stiffness, the higher the friction coefficient of the friction plate, the larger the straight diameter of the clutch, and the better the clutch performance.