How does an engine overload affect combustion?

An engine overload can significantly alter the combustion process within the engine, leading to abnormal combustion phenomena and detonation. When an engine is overloaded, it may not receive the optimal air-to-fuel ratio needed for efficient combustion. This imbalance can cause incomplete combustion, where not all fuel is burned properly, resulting in excessive buildup of unburned fuel and carbon deposits.

Moreover, the increased pressure and temperature conditions created by overloading can lead to detonation—where the air-fuel mixture ignites prematurely—increasing the risk of engine knocking. This abnormal combustion can not only reduce the engine's efficiency but also cause severe damage to engine components over time, such as pistons and cylinder heads. Understanding these consequences is crucial for maintenance and operation, as they affect both performance and longevity of the engine.