發(fā)動(dòng)機(jī)失火原理及排查研究

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摘 要：發(fā)動(dòng)機(jī)失火是在發(fā)動(dòng)機(jī)試驗(yàn)過程尤其是整車試驗(yàn)時(shí)出現(xiàn)概率比較高的重大問題之一。發(fā)動(dòng)機(jī)失火后，大量未燃燒的可燃物進(jìn)入三元催化器，極有可能再次燃燒，導(dǎo)致三元催化器損壞。另外，未燃燒物進(jìn)入大氣，也造成大氣污染，這是排放法規(guī)所不允許的。本文主要研究發(fā)動(dòng)機(jī)失火原理及其排查方法。

關(guān)鍵詞：失火檢測(cè) 失火故障燈 故障樹

Engine misfire principle and investigation

Huang Zhenhua，Liang Zhenbang，F(xiàn)eng Ning

Abstract：Engine Misfire is one of the most important problems in engine test， especially in vehicle test. After engine misfire， a large number of unburned combustibles into the three-way catalytic converter， it is very likely to burn again， resulting in three-way catalytic converter damage. In addition， the unburned matter into the atmosphere， but also cause air pollution， which is not allowed by emission regulations. This paper mainly studies the principle of engine misfire and its checking method.

Key words：fire detection， fire fault lamp， fault tree

1 失火定義

發(fā)動(dòng)機(jī)失火，是指發(fā)動(dòng)機(jī)一個(gè)或者多個(gè)氣缸不做功或者做功不足，也就是我們經(jīng)常說的發(fā)動(dòng)機(jī)缺缸。（剩余2298字）