Glow ignition the conditions and causes

Detonation and glow ignition - these are two different phenomena. Glow ignition - the process of ignition of the fuel mixture the surface of a hot part of the combustion chamber. When glow ignition combustion mixture occurs as usual, but a bit premature, and is equivalent to an increase in spontaneous ignition timing in relation to the optimum value. In this mode, the engine power suddenly and sharply, and if not to reduce the load on the engine - the overheated parts will be damaged. In theory, shared by two cases of heat rating Ignition - up sparks between the electrodes of the spark plug, or after. Real danger for the engine is only the first case. The most common cause of ignition is the heat rating spark plugs overheating that may occur when you use too "hot" spark plug. In addition, the source of heat rating plugs may be the exhaust valve or piston. It should be noted that the temperature at which ignition can occur glow of overheated valve or piston - less than the candles, as the igniting ability depends not only on the heat, but also on the surface area of ??the overheated part. Also, it should be noted that the overheating of the exhaust valve can be triggered by an incorrect adjustment of timing, which resulted in the exhaust valve is clamped so that it can not hermetically sealed hole in the head of the engine to the exhaust from the combustion chamber. Common causes of ignition heat rating is too early ignition and engine operation for a long time in the maximum power output at maximum speed (insufficient cooling of the cylinder block and head), when full throttle (rich fuel mixture). Thus, glow ignition occurs at maximum engine power.