Estimating biodiesel blend using virtual sensors and virtual sensing methods

Abstract

A method can include controlling, by at least one controller, an amount of hydrocarbons provided upstream of a diesel oxidation catalyst. The method can include determining, by the at least one controller, a first temperature of exhaust gas at an inlet of the diesel oxidation catalyst. The exhaust gas can be produced from combustion of fuel. The method can include determining, by the at least one controller, a second temperature of the exhaust gas at an outlet of the diesel oxidation catalyst. The method can include calculating, by the at least one controller, a lower heating value of the fuel based on the first temperature, the second temperature, the amount of hydrocarbons, and a flow rate of the exhaust gas. The method can include estimating, by the at least one controller, a percentage of biodiesel in the fuel based on the lower heating value.

Dependencies are inferred from the claim text.