| 摘要 |
A logic device for calculation of catalyst sulfation of a diesel automobile is provided to improve price competitiveness of diesel oxidation catalyst(DOC) by simplifying and optimizing calculation of catalyst sulfation for determining reproduction time of DOC. A logic device for calculation of catalyst sulfation of a diesel automobile includes a sulfur content calculating unit(110) based on fuel, a sulfur content calculating unit(120) based on engine oil, an adder unit(130), an AFR calculating unit(140) calculating an air/fuel ratio(AFR) using a fuel injection amount and an inflow air amount, a temperature-before-catalyst calculating unit(150) calculating a factor related to temperature before catalyst to calculate temperature before catalyst, a catalyst sulfation coefficient calculating unit(160), a final sulfation calculating unit(170), and a catalyst reproduction time determining unit(180). The sulfur content calculating unit based on fuel calculates a factor related to sulfur content in fuel and calculates sulfur content in combusted fuel. The sulfur content calculating unit based on engine oil calculates a factor related to sulfur content in engine oil and calculates sulfur content in used engine oil. The adder unit sums up the sulfur content calculated by the two sulfur content calculating units. The catalyst sulfation coefficient calculating unit calculates a catalyst sulfation coefficient by using the AFR and the catalyst shear temperature. The final sulfation calculating unit calculates final sulfation by multiplying the sulfur content by the catalyst sulfation coefficient. The catalyst reproduction time determining unit accumulates the sulfation obtained by the final sulfation calculating unit and determines a catalyst reproduction time.
|
