Engine brake control pressure strategy

Details Engine brake control pressure strategy Engine brake control pressure strategy

F - Mech Eng,Light,Heat,Weapons

02

D

F02D 13/04 (2006.01)

Patent

CA 2536038

An engine (10) has a hydraulic system (28) that serves both fuel injectors (22) and hydraulic actuators (40) of an engine brake (38) that brakes the engine (10) by controlling exhaust gas flow during engine braking. Pressure of the hydraulic fluid is set by an injection control strategy when a brake control pressure strategy is inactive. When the brake control pressure strategy is active, braking of the engine (10) occurs when hydraulic fluid is delivered to the actuators (40). The brake control pressure strategy signals pressure of the hydraulic fluid supplied to the one or more actuators (40) that is in excess of a pressure determined by a brake control pressure strategy. The brake control pressure strategy then limits pressure of the hydraulic fluid.

La présente invention se rapporte à un moteur (10), qui comprend un système hydraulique (28) qui dessert les deux injecteurs de carburant (22) et les actionneurs hydrauliques (40) d'un frein moteur (38) qui freine le moteur (10) en régulant le flux des gaz d'échappement lors du freinage moteur. La pression du fluide hydraulique est définie par une stratégie de régulation d'injection lorsqu'une stratégie de pression de commande de frein est inactive. Lorsque la stratégie de pression de commande de frein est active, le freinage du moteur (10) intervient lors de la distribution de fluide hydraulique aux actionneurs (40). La stratégie de pression de commande de frein consiste à signaler lorsque la pression du fluide hydraulique fournie audit ou auxdits actionneurs (40) excède une pression déterminée par une stratégie de pression de commande de frein. La stratégie de pression de commande de frein consiste ensuite à limiter la pression du fluide hydraulique.

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