Method of controlling an engine with an egr system

Details Method of controlling an engine with an egr system Method of controlling an engine with an egr system

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 25/07 (2006.01) F02B 37/24 (2006.01) F02D 21/08 (2006.01) F02D 41/00 (2006.01)

Patent

CA 2401115

A method of controlling an internal combustion engine (12) includes determining an exhaust gas recirculation (EGR) command signal based on at least one engine condition, and determining a variable geometry turbocharger (VGT) command signal based on at least one engine condition and at least partially based on the EGR command signal. Advantageously, the EGR system (66) and VGT system (52) may be continuously and simultaneously controlled (22), taking into account the effects of each system on the other, to provide improved and more precise control over engine air flow. In an alternative embodiment, an engine (12) may be controlled with a feedback control system where engine intake chemical composition is the feedback variable.

La présente invention concerne un procédé permettant de commander un moteur (12) à combustion interne, qui consiste à déterminer un signal de commande de recirculation des gaz d'échappement (RGE) fondé sur au moins un état du moteur, et à déterminer un signal de commande de turbocompresseur à géométrie variable fondé sur au moins un état du moteur et fondé au moins partiellement sur le signal de commande RGE. On peut avantageusement commander (22) de façon continue et simultanée le système RGE (66) et le système de turbocompresseur à géométrie variable (52), en prenant en compte les effets de chaque système sur l'autre, de façon à améliorer et commander plus précisément le flux d'admission d'air. Dans un autre mode de réalisation de l'invention, on peut commander un moteur (12) avec un système de commande à rétroaction lorsque la composition chimique de l'admission du moteur est la variable de rétroaction.

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