电控天然气发动机燃料喷射和点火的控制方法

结合天然气发动机的具体参数和特性,确定了控制喷射提前角和喷射脉宽以及点火提前角与点火能量的方法,提出了一种统一的控制点火线圈通电时刻的方法,消除了点火分段控制带来的不利影响.按参考点的不同,提出了两种确定点火提前角的方法,并分析了两种方法产生差别的原因.对用一个微控制器来同时控制6缸发动机喷射和点火的可能性和方法进行了研究,提出了实现这一目标的方法,并对这一方法进行了静态试验和台架试验,证实了该方法是可行性的.

Control Method of Fuel Injection and Ignition of Electronic Controlled Natural Gas Engine

The method to control the injection advance angle, injection pulse width, and ignition advance angle and ignition energy is determined by using the specific CNG engine parameters and characteristic. A uniform method to control the electrify timing of the ignition coil is proposed, and it eliminates the disadvantages brought by ignition division. Two methods of determining ignition advance angle are proposed according to different reference point, and the reason for this difference of the two methods are analyzed. The possibility and method to control the injection and ignition of a 6-cylinder engine using one micro-controller are studied, and this method is proved to be viable through static test and bed test.