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简要介绍了作者开发的可对多缸汽油机各缸压力进行同时检测的测量系统；报导了利用该系统对４９２ Ｑ Ｃ汽油机各缸倒拖压力进行测量及比较分析的结果。在转速分别为ｎ＝ ９９９ ｒ／ｍ ｉｎ、１ ３９３ ｒ／ｍ ｉｎ、２ ３１８ ｒ／ｍ ｉｎ、３ ８０４ ｒ／ｍ ｉｎ 的条件下，测量了节气门开度变化时的各缸倒拖压力，比较分析了可近似反映各缸进气量大小的各缸倒拖压力最大值。结果表明，采用作者开发的多缸发动机各缸压力同时测量系统可有效地对多缸发动机倒拖时的缸间充气量差异进行评价。试验用发动机的第１ 缸倒拖最大压力的变动大于第２ 缸，第３ 缸的倒拖最大压力的变化大于第４ 缸；第４ 缸的进气量最大，第２ 缸的进气量最小；各缸的倒拖最大压力偏差率在－ ９％ ～６％ 的范围内变化
This paper introduces a measuring system developed by the author which can detect the pressure of each cylinder of a multi-cylinder gasoline engine at the same time. The result of measuring and comparing the descending pressure of each cylinder of 492 Q C gasoline engine is reported. Under the conditions of n = 999 r / m in, 1 393 r / m in, 2 318 r / m in, and 3 804 r / m in respectively, , Comparative analysis of the maximum value of each cylinder reverse pressure that can approximately reflect the size of each cylinder intake. The results show that the multi-cylinder engine simultaneous pressure measuring system developed by the author can effectively evaluate the difference of the air charge between cylinders when the multi-cylinder engine is dragged. The change of maximum pressure of overturning in the first cylinder of the test engine was greater than that of the second cylinder, and the change of the maximum pressure in the third cylinder was greater than that of the fourth cylinder. The intake air in the fourth cylinder was the largest and the intake air in the second cylinder was the smallest ; The maximum pressure deviation rate of each cylinder dragging changes in the range of-9% ~ 6%