What Are the Factors Affecting Ignition Timing?

[MacDaisy]

Ignition timing is influenced by the following factors: 1. Cylinder temperature and pressure: The faster the combustion, the smaller the ignition timing should be. Factors affecting cylinder temperature and pressure include: engine compression ratio, ambient temperature, cylinder temperature, and load. This is why vehicles perform differently in seasons with varying temperatures. 2. Gasoline octane rating: The higher the octane number, the stronger the anti-knock capability, allowing for a larger ignition timing. 3. Air-fuel mixture ratio: Both too rich and too lean mixtures burn slowly, requiring an increase in ignition timing. This mainly depends on throttle opening and altitude. For unpredictable situations, some vehicles are equipped with knock sensors that automatically reduce ignition timing when knocking occurs. Clearly, traditional analog ignition systems are inadequate for such complex adjustments. Only microcontroller-based ignition systems can achieve the optimal ignition timing with high speed, precision, and stability.