What does delayed ignition advance angle mean? What will happen?

It's just that the ignition time is late

Consequences: ignition is too late, gas work is difficult, fuel consumption is high, efficiency is low, and exhaust noise is high.

Influencing factors of ignition advance angle;

The biggest factors affecting the ignition advance are the rotational speed and the combustion speed of the mixture. With the increase of rotating speed, the time to turn the same angle becomes shorter, and only a larger advance angle can get the corresponding advance time. The combustion speed of mixture is related to the composition of mixture and the structure of engine, such as the shape of combustion chamber and compression ratio.

Extended data:

Function:

The mixture in the cylinder burns at a certain speed, that is, it takes a certain time for the spark plug to ignite and the combustible mixture in the cylinder to burn completely. However, due to the high speed of the engine, the crankshaft can turn a large angle in such a short time.

If the ignition happens just when the piston reaches the top dead center and the mixture begins to burn, then the piston has already started to move downward, resulting in a decrease in engine power. Therefore, it is necessary to ensure that the energy generated by combustible mixture can be effectively utilized by early ignition to improve the output power of the engine.

When the throttle opening, speed and mixture concentration of gasoline engine remain unchanged, the power and fuel consumption of gasoline engine change with the change of ignition advance angle. There is an optimal ignition advance angle for each working condition of the engine.

Proper ignition advance angle can make the engine do the most mechanical work in each cycle.

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