Compensation for oxygenated fuels in a diesel engine

Details Compensation for oxygenated fuels in a diesel engine Compensation for oxygenated fuels in a diesel engine

2010-07-20

2011-10-25

Wolfe, Jr., Willis (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S00100A, C123S575000, C073S035020

Reexamination Certificate

active

08046153

ABSTRACT:
A fuel compensation factor (FCF) is determined to account for the amount of oxygenated fuel blended in diesel fuel. In one embodiment, the FCF is based on an expected exhaust gas oxygen concentration compared to an actual exhaust gas oxygen concentration. The FCF is used to estimate an amount of oxygenated fuel in the blend. Such estimate can be used to adjust the exhaust temperature model, which is used at least in determining the temperature in aftertreatment devices, the fuel dilution model which affects oil change recommendations, and the diesel particulate filter loading model which affects regenerations. Biodiesels are more prone to waxing at lower temperatures. The estimated amount of biodiesel and the temperature in the injection system are used to prevent and/or delay starting when it is predicted that too much wax exists in the fuel system.

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Harman, Alan, http://wardsauto.com/ar/cummins—purdue—nox—100222, Cummins, Purdue Partner to Reduce NOx Emissions in Biodiesel Engines, pp. 1-2.
Drawing from FMC 3220 PUSA, pp. 1-3.

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