Locomotive engine restart shutdown override system and method

F - Mech Eng,Light,Heat,Weapons – 01 – P

Patent

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F01P 5/14 (2006.01) F02N 19/00 (2010.01) F01P 11/18 (2006.01) F02D 17/04 (2006.01)

Patent

CA 2533349

A system for overriding an EMD locomotive engine protective device (40) which includes a low water pressure sensing device (16) in communication with the engine cooling system for shutting down the engine when low water pressure in the engine is sensed, the override system comprising a water assist pump (20) connected to a source of water and communicating with the protective device (40) for supplying pressurized water to the low water pressure sensing device (16) to maintain relatively high water pressure to prevent the device (40) from shutting down the engine: and a controller for activating the water assist pump (20) during start up of the engine.

L'invention concerne un système de neutralisation d'un dispositif de protection (40) du moteur d'une locomotive EMD, qui comprend un détecteur de basse pression d'eau (16) communiquant avec le système de refroidissement du moteur pour arrêter celui-ci lorsqu'une basse pression d'eau dans le moteur est détectée. Le système de neutralisation comprend une pompe à eau auxiliaire (20) raccordée à une source d'eau et communiquant avec le dispositif de protection (40) pour alimenter en eau pressurisée le détecteur de basse pression d'eau (16) afin de maintenir une pression d'eau relativement élevée pouvant empêcher le dispositif (40) d'arrêter le moteur. Le système de neutralisation comprend également un organe de commande destiné à activer la pompe à eau auxiliaire (20) au démarrage du moteur.

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