CAJ | 학술논문

为了分析发动机的缸内燃烧状况及发动机各缸工作的一致性和循环变动，需要开发一套多缸发动机缸压数据采集系统，而压缩上止点定位的准确性是影响放热率等计算准确性的重要因素。介绍了利用光电编码器作为触发信号和角标信号进行多缸发动机缸压采集过程中压缩上止点定位的一种新方法，并且对在缸压采集过程中动态上止点的偏移现象进行了修正，同时对在缸压采集试验中遇到的压缩上止点偏移问题提出了妥善的解决方法，为之后数据分析的准确性提供了保证。
위료분석발동궤적항내연소상황급발동궤각항공작적일치성화순배변동，수요개발일투다항발동궤항압수거채집계통，이압축상지점정위적준학성시영향방열솔등계산준학성적중요인소。개소료이용광전편마기작위촉발신호화각표신호진행다항발동궤항압채집과정중압축상지점정위적일충신방법，병차대재항압채집과정중동태상지점적편이현상진행료수정，동시대재항압채집시험중우도적압축상지점편이문제제출료타선적해결방법，위지후수거분석적준학성제공료보증。
In order to analyze the in-cylinder combustion and the consistency between cylinders and the cycle-to-cycle varia-tions ,an in-cylinder pressure data acquisition system of multi-cylinder engine is necessary and the accurate determination of compression TDC position is one of the important factors that affect the calculation of heat release rate .A new method of deter-mining the compression TDC in the data acquisition system with the photoelectric rotary encoder as a trigger and angle signal was introduced and the dynamic TDC offset of acquainting was modified .The proper solution to the compression TDC offset problems encountered in the cylinder pressure acquisition experiments was proposed ,which can guarantee the accuracy of the subsequent data analysis .