Apparatus and method for accurate detection of locomotive...

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

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F02D 41/30 (2006.01) F02D 1/00 (2006.01) F02D 41/34 (2006.01)

Patent

CA 2539330

The invention relates to a system and method for detecting a closing of a solenoid (112). The system includes a capacity charge circuit electrically coupled to the solenoid (112). The capacity charge circuit conditions the current flow through the solenoid (112) to increase the current in response to the closing of the solenoid (112). The invention also relates to a system and method that includes detecting a current through the solenoid (112) and determining a current slope characteristic. The current slope characteristic is a function of the current and time. The method also includes conditioning an electrical characteristic of the solenoid (112) such that the conditioning is in response to a current slope parameter. The current slope parameter defines a change in the current after removal of an electrical charge to the solenoid (112).

L'invention concerne un système et un procédé permettant de détecter la fermeture d'un solénoïde (112). Le système comprend un circuit à charge de capacité connecté au solénoïde (112). Ce circuit à charge de capacité conditionne le courant traversant le solénoïde (112) de façon à augmenter le courant en réponse à la fermeture du solénoïde (112). L'invention concerne également un système et un procédé consistant à détecter un courant traversant le solénoïde (112) et à déterminer une caractéristique de variation de courant. Cette caractéristique de variation de courant dépend du courant et du temps. Le procédé consiste également à conditionner une caractéristique électrique du solénoïde (112) de façon que le conditionnement réponde à un paramètre de variation de courant. Le paramètre de variation de courant définit une variation de courant après le retrait d'une charge électrique au niveau du solénoïde (112).

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