Power supply control apparatus and method for hybrid vehicle

B - Operations – Transporting – 60 – W

Patent

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Details

B60W 10/26 (2006.01) B60K 6/48 (2007.10) B60L 11/14 (2006.01) B60W 10/06 (2006.01) B60W 10/08 (2006.01) B60W 20/00 (2006.01) F02D 29/02 (2006.01) F02D 45/00 (2006.01) F02N 11/04 (2006.01) F02N 11/08 (2006.01)

Patent

CA 2662638

When the temperature of an engine (ENG) and a main battery (B1) is low at the time of activating a vehicle system, an ECU (40) starts the engine (ENG) in advance and outputs a running permission signal after completion of engine startup. At this stage, the ECU (40) suspends a defect diagnosis operation on a subsidiary load (60) and feedback-controls the DC/DC converter (30) by setting the voltage control value to a level lower than the output voltage from the subsidiary battery (B2) and at least the lower limit of the operating voltage of the ECU (40). The ECU (40) feedback- controls the DC/DC converter (30) by setting the voltage control value to a level of at least the output voltage of the subsidiary battery (B2) in response to completion of engine start-up. Then, the suspension of the defect diagnosis operation on the subsidiary load (60) is canceled and a running permission signal is output.

Selon l'invention, lorsque la température d'un moteur (ENG) et d'une batterie principale (B1) est basse lors de l'activation du système de démarrage d'un véhicule, une ECU (40) démarre le moteur (ENG) à l'avance et émet un signal d'autorisation de déplacement après démarrage du moteur. Pendant ce processus, l'ECU (40) interrompt une opération de diagnostic d'anomalie d'une charge auxiliaire (60), règle une commande de tension sur un niveau de tension inférieur à une tension de sortie d'une batterie auxiliaire (B2) et supérieur à une limite inférieure d'une tension de fonctionnement de l'ECU (40), et commande par asservissement un convertisseur CC/CC (30). Après démarrage du moteur, l'ECU (40) règle la commande de tension sur un niveau de tension supérieur à la tension de sortie de la batterie auxiliaire (B2) et commande par asservissement le convertisseur CC/CC (30). L'ECU (40) relance alors l'opération de diagnostic d'anomalie de la charge accessoire (60) et émet un signal d'autorisation de déplacement.

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