Method for determining the air mass flow into the cylinders...

F - Mech Eng,Light,Heat,Weapons – 02 – D

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F02D 41/18 (2006.01) F02D 41/14 (2006.01) G01F 1/00 (2006.01)

Patent

CA 2217824

Calculating the air mass actually flowing into the cylinder with the aid of an intake tube filling model which supplies, from the input variables of throttle opening angle and ambient pressure and from parameters which represent the valve control gear, a load variable on the basis of which the injection time is determined. Furthermore, this load variable is used for prediction in order to estimate the load variable at an instant which is at least one sampling step later than the current calculation of the injection time.

Le calcul du volume d'air effectivement admis dans le cylindre, à l'aide d'un modèle de remplissage de la tubulure d'admission, permet d'obtenir une grandeur de charge à partir des paramètres d'entrée angle d'ouverture du clapet du carburateur, pression ambiante et paramètres qui représentent la commande de la soupape. Sur cette base, on peut déterminer la durée d'injection. Cette grandeur de charge peut également servir à faire une estimation, par anticipation, de la grandeur de charge à un moment donné, lequel correspond à au moins une étape d'analyse supplémentaire par rapport au calcul en cours de la durée d'injection.

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