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Fuel and electric consumption in a hybrid vehicle

IP.com Disclosure Number: IPCOM000241923D
Publication Date: 2015-Jun-09
Document File: 4 page(s) / 18K

Publishing Venue

The IP.com Prior Art Database

Abstract

Comparing the economy of driving different vehicles is not easy. Many are used to fuel consumption presented as liters per kilometers, liters per 100 kilometers, or miles per gallon. However, electricity from e.g. the grid is usually measured in kWh (kilowatt*hours). In the US, the electric consumption of hybrid vehicles are recalculated in terms of “equivalent gasoline consumption”. However, when comparing a gasoline-electric hybrid vehicle to other types of hybrid vehicles, using for example diesel, fuel cells etc., a recalculation of equivalent gasoline consumption makes little sense The invention calculates the energy content of each consumed fuel means, e.g. petrol, diesel, hydrogen, electricity, or gas, in quantity of energy kWh. Moreover, a total quantity of consumed energy in kWh is provided. Also, a total consumed energy per distance unit is calculated, e.g. kWh/km.

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Fuel and electric consumption in a hybrid vehicle

BACKGROUND OF THE INVENTION AND PRIOR ART

The invention relates to hybrid vehicles, especially to determining and presenting the consumption of fuel and electricity of a hybrid vehicle.

Plug-in hybrid vehicles, such as cars, trucks and buses, have been provided to lessen the consumption of fossil fuels in vehicles. Such vehicles use a combination of electricity and a fuel source, such as diesel or petrol. As alternatives to petrol or diesel, many other types of vehicles have been provided such as with engines running on gas, ethanol, or hydrogen fuel cells. Also, fully electric cars have been known for a long time.

Comparing the economy of driving such different vehicles is not an easy task. Many are used to fuel consumption presented as liters per kilometers, liters per 100 kilometers, or miles per gallon. However, electricity from e.g. the grid is usually measured in kWh (kilowatt*hours). In order to compare for example plug-in electric-gasoline-hybrid vehicles, ideas have been put forward to recalculate the electric consumption in terms of “equivalent gasoline consumption”. However, when comparing a gasoline-electric hybrid vehicle to other types of hybrid vehicles, using for example diesel, fuel cells etc., a recalculation of equivalent gasoline consumption makes little sense.

The present invention provides a method and device for making such comparison easier. Also, it provides new means for the consumer to easily get information about and compare the economy of these types of vehicles.

SUMMARY OF THE INVENTION

The invention provides a method wherein the energy content of each consumed fuel means, e.g. petrol, diesel, hydrogen, electricity, or gas, is calculated in quantity of energy kWh. Moreover, the consumption of the used fuel(s) and the consumption of electricity is summarized into a total quantity of energy in kWh. Also, a total consumed energy per distance unit, e.g. km (kilometers) is calculated.

The invention provides a user interface comprising a trip meter, which together with the travelled distance of the trip meter presents total energy for the travel, and/or mean value of energy consumption per distance unit, e.g. kWh/km for the trip.

Moreover, the invention is also configured to use the consumption of fuel to determine a measure of the emission of carbon dioxide, CO2. The invention is adapted to present the emissions of carbon dioxide as an accumulated value and as a trip value.

Thereby the invention provides many advantages, for example:

- the invention makes it easier to determine the costs of using the vehicle,

- the invention makes it easier to determine the emissions of carbon dioxide of the vehicle,

- the invention makes it easier to compare vehicles,

- the invention makes it easier to know how far the vehicle may travel before needing a refueling and/or charging.

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