Method for electronically trimming an injector

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

Patent

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Details

F02M 51/00 (2006.01) F02D 41/24 (2006.01) F02M 65/00 (2006.01)

Patent

CA 2325392

The invention relates to a method for electronically trimming at least one fluid injection pump. According to said method, a control module of an electronic control device detects a control signal which is corrected in accordance with the operation of the injection pump and preferably also a control signal which is corrected in accordance with the operation of the engine. Said control signal(s) is/are used to actuate the fluid injection pump. The inventive method also uses a fluid injection pump which operates according to the energy accumulation principle. The characteristic output of said fluid injection pump is identical or at least substantially approximative to a polynomial of at least the third degree. According to the inventive method, the parameters for a standard polynomial of at least the third degree are detected, stored and used to detect the required amount of fluid injection.

L'invention concerne un procédé de compensation électronique d'au moins une pompe d'injection de fluide. Selon ce procédé, un signal de commande corrigé en fonction du fonctionnement de la pompe d'injection et, de préférence, un signal de commande corrigé en fonction du fonctionnement du moteur sont déterminés par un module de commande d'un système de commande électronique, les deux signaux étant ensuite utilisés pour actionner la pompe d'injection de fluide. En outre, on utilise une pompe d'injection de fluide fonctionnant selon le principe d'accumulation d'énergie, dont la courbe caractéristique de refoulement suit de manière identique ou de manière au moins largement approximative un polynôme au moins du troisième degré. Ce procédé consiste également à déterminer et mémoriser les paramètres dans des conditions normales prédéterminées pour un polynôme normal au moins du troisième degré, et à utiliser lesdits paramètres lors de la détermination de la quantité requise de fluide à injecter.

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