A solenoid valve control device

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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F16K 31/06 (2006.01) B60T 15/18 (2006.01)

Patent

CA 2212308

Three-position solenoid valve which outputs an output pressure and can adopt exhaust, overlapping and supply positions. The output pressure is detected by an output pressure sensor and is fed back to a fuzzy control unit. Based on the difference between the output pressure and the command pressure corresponding to the pressure command signal from the brake control unit, such fuzzy control unit calculates a command current value for controlling the three-position solenoid valve by fuzzy reasoning. The command current value can adopt an essentially continuous value, and consequently the three-position solenoid valve can adopt a gentle exhaust state or a gentle supply state. In this way, sudden changes in the output pressure can be suppressed and the output pressure can be made to converge rapidly on the command pressure and eliminate overshoot and undershoot.

Vanne électromagnétique à trois positions pouvant fournir une pression de sortie et adopter des positions d'extraction, de chevauchement et d'alimentation. La pression de sortie est détectée par un détecteur de pression de sortie et est donnée à une unité de commande floue. Selon la différence entre la pression de sortie et la pression de commande correspondant au signal de commande de pression de l'unité de commande de frein, l'unité de commande floue calcule une valeur actuelle de commande pour contrôler la vanne par une logique floue. La valeur actuelle de commande peut adopter une valeur essentiellement continue et, par conséquent, la vanne peut adopter un état d'extraction modéré ou un état d'alimentation modéré. On peut ainsi éviter des changements brusques de pression de sortie, diriger rapidement cette dernière à la pression de commande et en éliminer les exagérations.

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