In an NOSUBx /SUBdischarge quantity estimation method for an internal combustion engine equipped with an EGR apparatus, the gas components (e.g., oxygen molecules and NOSUBx/SUB) of intake gas taken into a combustion chamber are assumed to be uniformly distributed throughout the entire region of the combustion chamber. Under such assumption, the combustion chamber is divided into a combustion region (region B) and a non-combustion region (region A) by making use of the ratio of the "mass of oxygen consumed as a result of combustion" to the "total mass of oxygen taken in the combustion chamber." Further, under the assumption that NOSUBx/SUBgenerated as a result of combustion remains in the region B after combustion, and NOSUBx /SUBpresent in the region A before combustion due to circulation of EGR gas is conserved after combustion, the quantity of NOSUBx /SUBdischarged from the exhaust passage to the outside is calculated in consideration of not only the quantity of combustion-generated NOSUBx /SUBin the region B but also the quantity of circulated NOSUBx /SUBin the region A.
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机译:在配备有EGR装置的内燃机的NO x SUB>排放量估计方法中,将进气的气体成分(例如,氧分子和NO x SUB>)吸入假设燃烧室在燃烧室的整个区域上均匀分布。在这样的假设下,通过利用“燃烧所消耗的氧气的质量”与“总的”的比率,将燃烧室分为燃烧区域(区域B)和非燃烧区域(区域A)。在燃烧室中吸收的氧气质量。”另外,在燃烧后的区域B中残留有因燃烧而产生的NO x SUB>,燃烧前的区域A中存在NO x SUB>的情况是由于循环的原因。燃烧后保留EGR气体,不仅考虑燃烧中产生的NO x SUB>的数量,计算从排气通道排放到外部的NO x SUB>的量区域B,还有区域A中循环NO x SUB>的数量。
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