Automatic engine speed control system

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

Patent

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Details

F02D 41/08 (2006.01) F02D 31/00 (2006.01)

Patent

CA 2186593

An automatic engine speed hold control system (4301 allows an engine (420) to quickly achieve a commanded engine speed and thereafter maintain a constant commanded engine speed regardless of changes in engine loading. An engine speed error signal (444) is computed as the difference between an operator commanded engine speed (440) and actual engine speed (434, 436). The engine speed error signal (444) is scaled based on an engine speed error gain (448), and the scaled engine speed error (452) is then provided via an integral path (456) and a proportional path (454) to a summing junction (478) where it is summed with load anticipation trim signals (474, 467) to provide a final trim signal (485). The load anticipation trim signals (474, 467) are feed forward signals which anticipate engine response to changes in commanded engine loading, The combined engine trim signal (452) and load anticipation trim signals (474, 467) provide an engine speed hold throttle position command (final trim signal) (485) to control fuel flow to the engine (420) and therefore control engine speed. The engine speed error gain (448) is determined based on engine loading (450), and the error gain is thereafter limited (451) based on current engine speed.

Système de maintien automatique (430) du régime d'un moteur (420) lui permettant d'atteindre rapidement le régime indiqué et s'y maintenir indépendamment des variations de charge sur le moteur. Un signal d'erreur de régime (444) est calculé représentant la différence entre le régime indiqué (440) et le régime réel (434, 436). Ledit signal (444), étalonné en fonction du gain d'erreur de régime (448) et de l'erreur de régime (452) étalonnée, est transmis par une fonction entière (456) et de proportionalisation (454) à une jonction d'addition (478) ou il est additionné avec des signaux de correction sur anticipation de charge (474, 467) pour donner un signal final de correction (485). Les signaux de correction sur anticipation de charge (474, 467) sont des signaux d'anticipation qui prévoyant la réponse du moteur à des modifications des instructions de variation de charge, à des signaux combinés de correction (452) et à des signaux de correction sur anticipation de charge (474, 467), émettent une instruction de positionnement de la commande de gaz stabilisant le régime (signal de correction finale) (485) régularisant le débit de carburant au moteur (420), et par là, le régime. Le gain d'erreur de régime (448) du moteur qui est fonction de sa charge (450) est limité ensuite (451) en fonction de la vitesse réelle.

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