Method and system for controlling a drivetrain retarder

B - Operations – Transporting – 60 – T

Patent

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Details

B60T 10/00 (2006.01) B60T 8/00 (2006.01) B60T 8/32 (2006.01) B60T 8/48 (2006.01) B60T 13/58 (2006.01)

Patent

CA 2439828

A method of operating a retarder control system (17) for a drivetrain retarder (12) such as an engine compression brake of a heavy-duty truck vehicle is disclosed. The method of operation includes three novel subsets each of which controls the operational state and the resistance level at which the drivetrain retarder (12) is operated dependent at least partially upon one or more factors including speeds of one or more drivetrain components (20), vehicle speed, rotational speed of one or more undriven wheels, position of a brake control member, elapsed time of activation of a brake control member (22) and/or elapsed time from a change in a selected resistance level at which the retarder control system (17) is commanded to effect operation of the drivetrain retarder (12).

L'invention concerne un procédé de fonctionnement d'un système de commande de ralentisseur (17) destiné à un ralentisseur secondaire (12), tel qu'un frein moteur par compression, d'un véhicule poids lourd. Ce système de commande comprend trois nouveaux sous-ensembles permettant de commander l'état de fonctionnement du ralentisseur secondaire (12) et le niveau de résistance à partir duquel il est mis en fonctionnement, en fonction, au moins en partie, d'un ou plusieurs facteurs, y compris la vitesse d'un ou de plusieurs organes de transmission (20), la vitesse du véhicule, la vitesse de rotation d'une ou de plusieurs roues libres, la position d'un élément de commande du frein, le temps écoulé depuis l'activation de l'élément de commande du frein (22) et/ou le temps écoulé depuis un changement du niveau de résistance sélectionné à partir duquel le système de commande de ralentisseur (17) est actionné pour faire fonctionner le ralentisseur secondaire (12).

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