How to adjust the ignition advance angle, the normal value range of the ignition advance angle

Ignition advance is when the engine piston has not reached the compression top dead center, the spark plug sparks in advance, and from the moment the spark plug sparks to the compression top dead center, the angle that the crankshaft has rotated is called It is the ignition advance angle.

Why is the ignition advance angle necessary?

Since it takes a certain amount of time from the ignition of the spark plug to the flame propagation until the combustible mixture in the cylinder is completely combusted, the engine rotates at a high speed during operation. If the ignition starts at the moment when the piston reaches the top dead center, When the combustible gas mixture begins to burn completely, the piston must have begun to move downwards. This will cause the loss of gas thrust, and ultimately lead to a decrease in engine power, so current engines will have an ignition advance angle.

If the spark plug ignites before the piston reaches the top dead center, when the piston just reaches the top dead center, the combustible gas mixture can be completely combusted immediately (theoretically, the highest gas pressure appears at 10°-15° after compression top dead center. ), which can greatly reduce the loss of gas thrust, thereby enhancing the power output of the engine.

Normal value range of ignition advance angle

The normal range of ignition advance angle is between 5°-60°.

Under normal circumstances, the minimum ignition advance angle cannot be less than 5°, and the maximum cannot exceed 60°, but generally speaking, the ignition advance angle of most engines will be set between 5°-30°.

How to adjust the ignition advance angle by yourself?

Try to go to the 4S shop to make adjustments. If you make adjustments blindly, it will be counterproductive.

Since the adjustment of the ignition advance angle requires a large number of detection and debugging tools, and a certain amount of automotive theoretical knowledge support, when the ignition advance angle of our vehicle has a problem, we should try to go to the 4S shop to deal with it.