Method for determining composition of mixture of fuels such as gasoline and ethanol, in fuel storage tank for operating Otto engine of vehicle, involves determining composition of fuel mixture from pressure and temperature of fuel mixture

摘要

The method involves operating an internal combustion engine with a fuel mixture of two fuels, and determining pressure in a fuel storage tank or a container associated with the storage tank. Composition of the fuel mixture is determined from the pressure and the temperature of the fuel mixture at the fuel storage tank or the container associated with the tank. The temperature of the fuel mixture is determined by a model based on temperature of internal combustion engine, vehicle speed and/or activity of a fuel pump. An independent claim is also included for a device for determining composition of a fuel mixture in a fuel storage tank for operating an internal combustion engine.