Let’s discuss about the factors of abnormal combustion. Abnormal combustion leads to poor engine performance or even engine damage.
Fouling is said to happen when the spark plug tip temperature is insufficient to burn off the fuel, carbon, oil and other deposits. Fouling percolates the spark to the metal shell and hence the spark plug will fail to spark across the plug gap resulting in misfire. The wet fouled spark plugs will not fire [...]
When enough voltage is not delivered to light off the fuel in the combustion chamber at the exact moment of the power stroke, a spark plug can be said to have misfired. It might be a few degrees before top dead center. There could be a variety of reasons for a spark plug to generate [...]
Detonation is commonly found in cars that are highly tuned. When portions of the gas in the combustion chamber, generally the portion of gas at a corner, most far away from the spark plug self ignites, it is known as detonation. In the condition of detonation, the self ignition of that portion of the gas [...]
The ignition of the air/fuel mixture before the preset ignition timing mark is termed as Pre-ignition. The mains reason of pre-ignition is due to the hot spots in the combustion chamber. Pre-ignition can also be caused amplified by low octane fuel, too high compression, insufficient engine cooling, lean air/fuel mixture, over advanced timing, or too [...]
Normal combustion is said to be the even, steady and complete burning of the air fuel mixture in the combustion chamber. Whereas abnormal combustion can be referred to when the internal combustion engine fails to run optimally. There are different types of abnormal combustion, viz Fouling, Misfires, Detonation, Pre Ignition, etc