Where is the timing chart and calibration point of Zhengzhou Nissan Yuxuan?

The ignition system ignites the engine according to the working sequence of the engine cylinders. The best ignition time can make the engine get maximum power and minimum fuel consumption. In the engine cylinder, it takes a certain time (about a few thousandths of a second) from the start of ignition to complete combustion. In order to make the engine emit maximum power, the ignition time should not be at the end of the compression stroke, but should be advanced appropriately.

There is a time process from ignition, combustion to burnout, and the best ignition advance angle is to maximize the gas expansion trend in the downward stroke of piston under various working conditions. This has the highest efficiency, the least vibration and the lowest temperature rise.

Extended data:

The best ignition advance angle is mainly related to engine speed, load and fuel type (such as gasoline brand).

When the engine throttle is fixed, it is necessary to increase the ignition advance angle with the increase of the rotational speed, but when the rotational speed reaches a certain value, the increase speed of the optimal ignition advance angle slows down instead of keeping the same increase speed.

When the engine speed is constant, with the increase of load, the throttle opening increases, so it is necessary to reduce the ignition advance angle appropriately. On the contrary, when the engine load decreases, the ignition advance angle should be increased appropriately.

Fuel type: different gasoline brands have different octane numbers, which indicate the anti-explosion performance of gasoline. When using gasoline with higher octane number, that is, better antiknock performance, the ignition advance angle should be increased.

Other factors: some other factors in the engine will affect the combustion speed of the mixture, and these factors will have a certain impact on the ignition advance angle, such as the shape of the combustion chamber, the temperature in the combustion chamber, the air-fuel ratio, the atmospheric pressure, the cooling water temperature, etc.

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