CAJ | 학술논문

为改善在用点燃式轻型汽车简易工况NO排气检测准确性，将NDIR检测法应用于 NO的排放检测。采用比对测试方法，在184辆在用轻型汽油车的ASM排放检测中，同时采用NDIR方法与通用的电化学法进行排气NO浓度测试。测试结果表明，对于NO检测，NDIR方法与工况的跟随性较电化学方法好，电化学方法测试响应时间较NDIR方法滞后7～8 s。采用有限差分法对两种检测方法的检测灵敏度进行分析，得出NDIR法的灵敏度为11．87，电化学法为6．97。分析NDIR法、电化学法两种检测方法下 NO测试浓度值的相关性，发现两者高度线性相关，相关系数为0．98。研究结果表明NDIR方法完全适用于ASM 工况NO排气浓度检测，其检测准确率较电化学方法高。
위개선재용점연식경형기차간역공황NO배기검측준학성，장NDIR검측법응용우 NO적배방검측。채용비대측시방법，재184량재용경형기유차적ASM배방검측중，동시채용NDIR방법여통용적전화학법진행배기NO농도측시。측시결과표명，대우NO검측，NDIR방법여공황적근수성교전화학방법호，전화학방법측시향응시간교NDIR방법체후7～8 s。채용유한차분법대량충검측방법적검측령민도진행분석，득출NDIR법적령민도위11．87，전화학법위6．97。분석NDIR법、전화학법량충검측방법하 NO측시농도치적상관성，발현량자고도선성상관，상관계수위0．98。연구결과표명NDIR방법완전괄용우ASM 공황NO배기농도검측，기검측준학솔교전화학방법고。
The NDIR measurement method was applied to improve the NO measurement accuracy of light‐duty gasoline car under simple operating mode .NO emissions of 184 light‐duty gasoline cars were measured with NDIR and electrochemical method respectively according to ASM standard .The results show that the NDIR method has better following behavior for op‐erating conditions ,that is 7~8 s faster than the electrochemical method .The measurement sensitivity analysis of finite differ‐ence method shows that the sensitivity of electrochemical method and NDIR method is 6 .9 and 11 .87 respectively .It is further found that the correlation coefficient between measured NO emissions with NDIR and electrochemical method is as high as 0 .98 ,which proves that the NDIR method is appropriate for NO measurement of ASM conditions and can improve the meas‐urement accuracy .