However, overexcessive amount of external EGR could lead to an extremely unstablecombustion or even misfiring .
但过大的外部EGR量，将导致发动机燃烧极度不稳定甚至失火。
2
It verified that there is a free space limit in motor combustion chamber. This limit is a value that affects the stable and unstablecombustion.
结果发现，发动机燃烧室存在一个自由容积的阈值，这个值是影响发动机稳态燃烧和非稳态燃烧的界限值。
3
The existence of overmuch residual exhaust gas together with its over mixing with fresh charge is one of the main causes of unstablecombustion at low load.