Patent ID: 8954221
Filing Date: 2015-02-10
Classification: F02D

Abstract:
1. An emission deterioration notifying device adapted for a spark-ignition internal combustion engine including a combustion chamber and for a fuel injection system including an injector, the engine being a direct-injection internal combustion engine that injects fuel from the injector directly into the combustion chamber, the emission deterioration notifying device comprising: a low fuel pressure determining unit configured to determine whether supply pressure of fuel supplied to the injector is in a low fuel pressure state, in which the supply pressure is higher than a fuel pressure at which fuel injection is allowed and is lower than a predetermined threshold value, wherein the predetermined threshold value is a threshold value for emission (EM); an emission deterioration notifying unit configured to notify that exhaust emission is deteriorating beyond its allowable range when it is determined that the supply pressure is in the low fuel pressure state; and an electric control unit that is configured to allow the notification by the emission deterioration notifying unit at a time of injection control at which the injection of fuel from the injector is allowed, and that is configured to prohibit the notification by the emission deterioration notifying unit or to reduce the threshold value at a time of injection stop control at which the injection of fuel from the injector is stopped.