Patent ID: 7848871
Filing Date: 2010-12-07
Classification: F02D,F02M,Y02T

Abstract:
1. A gas-mixture-state estimation apparatus for an internal combustion engine in which fuel is continuously injected into a combustion chamber of the internal combustion engine over a predetermined injection period from a predetermined injection start time, the gas-mixture-state estimation apparatus comprising: injection fuel dividing means for dividing the predetermined injection period into a plurality of periods and dividing the injection fuel into portions which are injected in the corresponding periods; and gas-mixture-state estimation means for individually estimating the state of each of gas mixtures formed through mixing of the plurality of portions of the injection fuel with a cylinder interior gas, which is a gas taken into the combustion chamber, wherein the estimating occurs by simulating a single injection over the predetermined injection period by simulating individual and successive injection of the plurality of portions of the divided injection fuel such that each portion is injected at the beginning of the corresponding period.