What is the meaning of knocking?
4 Answers
Knocking is an abnormal combustion phenomenon. When the pressure and temperature in the engine increase, atomized gasoline explodes before being ignited, causing severe vibration in the engine. This phenomenon is called knocking. Detailed explanations are as follows: 1. Manifestations of knocking: There are various irregular metal knocking sounds inside the engine, such as clanging, banging, or rattling noises, which may cause engine shaking and body vibration. The sound becomes louder when the throttle is fully open in high gear or when climbing a slope. 2. Hazards of knocking: It can lead to worsened emissions, reduced engine power, increased noise, higher fuel consumption, and decreased vehicle comfort. In severe cases, it may cause cylinder knocking, engine stalling, and damage to mechanical components of the engine.
I once experienced knocking in an old car, and it felt terrible. When accelerating, there was a 'knocking' sound, as if something was hitting inside. Knocking, simply put, is when the fuel-air mixture in the engine cylinder self-ignites prematurely before the spark plug fires, causing abnormal combustion. This can severely damage the engine, such as breaking pistons or cylinder blocks, and also affects the car's power and fuel consumption. In my case, it was due to using cheap gasoline with too low an octane rating; it could also have been caused by incorrect ignition timing or excessive carbon buildup. Since then, I always use high-quality gasoline, regularly clean engine carbon deposits, and avoid high-speed uphill climbs or overloading to significantly reduce the risk of knocking.
As a car enthusiast, I think knocking is like the engine "crying in pain," indicating a problem with the combustion process. The fundamental meaning is that the air-fuel mixture ignites prematurely before the spark plug fires, creating strong shock waves and producing a metallic knocking sound. This can be caused by low-octane gasoline, overly advanced ignition timing, or engine overheating. Prolonged neglect can lead to piston erosion or cylinder head damage. I regularly check the ignition system, use high-octane fuel, and keep the intake tract clean. Knocking is not only noisy but also threatens engine longevity. You can identify the issue by listening to the sound while driving.
I've been driving for many years, and engine knocking is like the engine making a drumming sound. The meaning is clear: the combustion is out of order, and the fuel-air mixture detonates before ignition. The main reasons are poor gasoline quality or heavy engine carbon deposits. If not repaired, the engine will be ruined. When I was younger, cars rarely had this issue, but now I prevent it with good habits.
