Method of utilization of valve bounce in a solenoid valve...

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

Patent

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Details

F02M 39/00 (2006.01) F02M 45/04 (2006.01) F02M 45/06 (2006.01) F02M 59/46 (2006.01) F02M 63/00 (2006.01)

Patent

CA 2332717

A method of utilizing the first valve bounce is used in a diesel engine having a solenoid valve controlled fuel injection system, wherein the solenoid actuacted valve is movable between a fully closed position for injection and a fully open position preventing injection. The method includes: energizing the solenoid for valve movement to the fully closed position (t1) for commencing pilot injection; de-energizing the solenoid immediately prior to the valve reaching the fully closed position (t2) for pilot injection in order to facilitate movement of the valve toward the fully open position immediately after the valve has reached the fully closed position (t3), thereby preventing subsequent valve bounces; and re-energizing (t4) the solenoid immediately prior to the valve reaching the fully open position (t5), whereby to facilitate movement of the valve toward the fully closed position (t6) for main injection immediately after the valve reaches the fully open position, thus preventing subsequent valve bounces and decreasing time lag between pilot and main injection.

L'invention concerne un procédé permettant d'utiliser le premier rebond de la soupape dans un moteur diesel comprenant un système d'injection de carburant commandé par soupape à solénoïde. Cette dernière est mobile entre une position complètement fermée et une position complètement ouverte empêchant l'injection. Ce procédé consiste: à mettre sous tension le solénoïde pour déclencher un mouvement de la soupape vers la position complètement fermée (t1), de manière à démarrer la préinjection; à mettre hors tension le solénoïde immédiatement avant que la soupape atteigne la position complètement fermée (t2) démarrant la préinjection, de manière à faciliter le mouvement de la soupape vers la position complètement ouverte immédiatement après que la soupape a atteint la position complètement fermée (t3), ce qui permet d'éviter des rebonds de soupape supplémentaires; enfin à remettre sous tension le solénoïde immédiatement avant que la soupape atteigne la position complètement ouverte (t5), de manière à faciliter le mouvement de la soupape vers la position complètement fermée (t6) pour provoquer l'injection principale immédiatement après que la soupape a atteint la position complètement ouverte, ce qui permet d'éviter des rebonds de soupape supplémentaires et de diminuer le décalage temporel entre la préinjection et l'injection principale.

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