众所周知,在进行汽油发动机台架试验时,需先确定最佳点火提前角度,以保证试验结果的正确性。确定最佳点火提前角,一般需要制取点火调整特性曲线。由于汽油发动机生产工艺上允许的不可避免的差异和主要附件如化油器、分电器等性能允差,所以用任意选定的转速制取的点火调整特性曲线来确定最佳点火提前角并不都准确, As we all know, in the petrol engine test bench, you must first determine the best ignition advance angle, in order to ensure the correctness of the test results. Determine the best ignition advance angle, the general need to make ignition adjustment characteristic curve. Due to the unavoidable differences allowed in the gasoline engine production process and the main accessories such as carburetor, distributor and other performance allowance, so with any selected speed of the ignition adjustment characteristic curve to determine the best ignition timing does not Are accurate,