Gm Global Technolgoy Operations, Inc.

Michael J Svestka

Mark D Carr

Richard B Jess

Julian R Verdejo

Joseph R Dulzo

Jeffrey A Sell

Louis A Avallone

Ian J Macewen

Kevin J Storch

Christopher R Graham

Onassis Matthews

An engine control module determining an alcohol compensated fuel consumption value includes an alcohol percent module that determines an alcohol percent in fuel and a fuel mass module that determines a mass of the fuel. The engine control module also includes a fuel volume module that calculates a volume of the fuel based on the mass of the fuel, a density of the fuel, and the alcohol percent.

Ethanol compensated fuel density for fuel consumed calculation

A method of estimating composition of fuel in the fuel tank of a vehicle. A refuel event is detected. Fuel consumption is monitored during a plurality of stages after the refuel event. A plurality of fuel trim shift values are determined relative to the stages. The fuel trim shift values are used to estimate a fuel composition change. This method eliminates a need for a hardware fuel composition sensor and also provides dynamic filtering of fuel trim values.

Apparatus and methods for estimating vehicle fuel composition

Growing community of inventors

Waterford, MI, United States of America

Michael J Svestka