Audi 2.0t Ignition Timing Angle

The ignition timing angle of Audi 2.0t is 6- 12, which is the angle of crankshaft rotation from the ignition time to when the piston reaches the compression top dead center. Premature fire will cause knocking, piston blockage, reduced efficiency, and increased heat load, mechanical load, noise and vibration, which should be prevented. Ignition is too late, gas is difficult to do work, fuel consumption is high, efficiency is low, and exhaust noise is loud.

Influencing factors of optimal ignition angle;

The higher the cylinder temperature and cylinder pressure, the faster the mixture burns and the smaller the ignition advance angle. Factors affecting cylinder temperature and pressure include engine compression ratio, air temperature, cylinder temperature and load. The higher the octane number of gasoline, that is, the higher the gasoline grade, the stronger the antiknock ability of gasoline, and the larger the corresponding allowable ignition advance angle.

The gas mixture ratio, which is too rich and too lean, has a slow combustion speed, so it is necessary to increase the ignition advance angle, and the gas mixture ratio mainly depends on the throttle opening, altitude and so on. When the engine is working, the ignition time has great influence on the working performance of the engine. Pre-ignition means that the spark plug ignites before the piston reaches the compression top dead center to ignite the combustible mixture in the combustion chamber.