(1) After the engine is ignited, deflagration sometimes occurs, which is an abnormal combustion. When the engine detonates, the flame burning speed is very fast, which can reach 2000-3000 m/s, while the normal flame burning speed is 20-40 m/s. Therefore, the temperature of the engine increases significantly, and the pressure of the cylinder also increases very greatly. Deflagration is characterized by metallic thumping noises in the cylinders, unstable engine operation, overheating, a simultaneous drop in power, and black smoke in the exhaust. Due to the deflagration of the engine, its economy deteriorates, the lubricating oil deteriorates, and even loses its lubricating performance, which increases the wear of the bearing. Therefore, the deflagration phenomenon is not allowed. The main cause of engine detonation is due to poor fuel quality, or improper matching of fuel grade and engine compression ratio. In addition, it is also related to the temperature of the engine itself, the position of the spark plug, the form of the combustion chamber, and the size of the advance ignition angle. Also, carbon deposits can also cause deflagration. After deflagration occurs, the throttle valve (accelerator) should be closed immediately to find out the cause and eliminate it.

(2) Pre-ignition: that is, without waiting for ignition, the combustible mixture in the cylinder burns by itself. The reason for the pre-ignition is that the temperature in the cylinder has reached the temperature at which the fuel will spontaneously ignite during the compression process. Therefore, it does not need to be ignited to burn itself. When pre-ignition occurs, the engine overheats, produces a lot of carbon, and the engine works unbalanced. Ke Ruipu chain saws are of excellent quality and favorable prices, and you are welcome to buy them.

By analyzing and understanding two problems in the combustion process of the chain saw engine, we can better understand the performance of the chain saw. Only when you are familiar with and master the performance of the machine, can the work efficiency and quality be improved, so as to truly achieve the purpose of saving labor and reducing costs.