What Factors Are Related to Ignition Timing Advance?

[JuliannaFitz]

Factors related to ignition timing advance include: 1. Engine speed; 2. Engine load; 3. Octane number; 4. Combustion chamber shape, combustion chamber temperature, air-fuel ratio, atmospheric pressure, and coolant temperature. The key factor affecting ignition timing advance is engine speed. As the speed increases, the time taken to rotate through the same angle decreases, requiring a larger advance angle to achieve the corresponding advance time. Ignition timing advance refers to the spark plug firing before the engine piston reaches the top dead center of compression. The angle through which the crankshaft rotates from the moment the spark plug fires until the piston reaches the top dead center of compression is called the ignition timing advance angle.