What are the solutions for engine knocking in cars?
2 Answers
Car knocking The most immediate and effective solution for engine knocking is to retard the ignition timing and reduce combustion pressure. Additionally, it is advisable to use regular gasoline suitable for the engine's compression ratio, regularly clean the fuel system and injectors at 4S shops, and appropriately use high-quality fuel additives. Below is relevant information about engine knocking: 1. The principle of engine knocking: When the engine inhales a mixture of fuel vapor and air, and the mixture ignites spontaneously before reaching the designed ignition point during the compression stroke due to various uncontrollable factors, the huge impact force generated by the combustion will oppose the piston's movement, causing engine vibration, known as knocking. 2. The hazards of knocking: The main damages of knocking to the engine include reduced engine power, increased fuel consumption, louder noise, decreased vehicle comfort, and worsened emissions. In the most severe cases, it can cause cylinder knocking, engine stalling, and damage to engine mechanical components, leading to significant financial losses for the car owner.
Having driven for over twenty years, I know that the annoying knocking sound of detonation is mostly caused by fuel igniting too early in the engine, most commonly due to using low-octane gasoline or excessive engine carbon buildup. The solution starts with prevention at the source—I always insist on using high-octane fuels like 95 or 98, which effectively resist premature ignition. I’ve also developed the habit of avoiding sudden acceleration uphill or prolonged high-load driving in scorching summer heat to reduce the risk of knocking. Regular maintenance is crucial; every 5,000 kilometers, I check if the spark plugs are worn out or if the ignition coils are functioning properly, and I ask the mechanic to clean the throttle body and combustion chamber carbon deposits. These small steps can save big repair costs. If you already hear knocking, don’t hesitate—slow down gently and pull over immediately, or the engine could suffer severe damage. Prevention is better than cure—that’s a veteran driver’s motto.
