A method of blending fuel

C - Chemistry – Metallurgy – 10 – L

Patent

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Details

C10L 1/02 (2006.01) C10L 1/182 (2006.01)

Patent

CA 2759429

The present invention relates to a method of blending a multi-component blended fuel. The method comprises selecting as a starting reference a known multi-component blended fuel (e.g. a blend of gasoline and ethanol) which is in use by an internal combustion engine which operates SI or HCCI combustion. The method comprises blending an alternative fuel which can be used by the same engine without modification of the engine, including without modifying the operating regime employed by its engine management system. The alternative fuel is a blend comprising all of the components of the known fuel and an additional fuel component (e.g. methanol). The blend components are blended in proportions which give to the alternative fuel: a stoichiometric air-fuel ratio by mass or by volume substantially equal to that of the known blended fuel; and/or a lower heating valve (e.g. volumetric or gravimetric) substantially equal to that of the known blended fuel; and/or produces a response from an ethanol sensor substantially equal to that of the known blended fuel.

La présente invention concerne un procédé de mélange pour produire un mélange carburant multi-constituant. Le procédé consiste à sélectionner comme référence de départ un mélange carburant multi-constituant connu (par ex. un mélange d'essence et d'éthanol) utilisé par un moteur de combustion interne qui fonctionne par combustion à allumage commandé ou à autoallumage par compression. Le procédé consiste à mélanger un carburant de remplacement qui peut être utilisé par le même moteur sans modification de ce dernier, sans même modifier le régime de fonctionnement de son système de gestion de moteur. Ledit carburant de remplacement est un mélange comprenant tous les constituants du carburant connu et un constituant carburant supplémentaire (par ex. méthanol). Les constituants du mélange sont mélangés dans des proportions qui donnent au carburant de remplacement : un rapport stoechiométrique air-carburant en masse ou en volume sensiblement égal à celui du mélange carburant connu; et/ou un pouvoir calorifique inférieur (par ex. volumétrique ou gravimétrique) sensiblement égal à celui du mélange carburant connu; et/ou la réponse obtenue lorsqu'ils sont soumis à un capteur d'éthanol est sensiblement égale à celle obtenue avec le mélange carburant connu.

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