Patent ID: 6718941
Filing Date: 2004-04-13
Classification: F02D,F02N

Abstract:
An engine fuel control device, comprising:a fuel supply means that supplies an engine with a fuel; a mixture ratio determination means that determines a mixing ratio of the fuel and air; a mixture introduction means that introduces the air-fuel mixture, whose mixing ratio has been established, into the engine; a flow rate determination means that determines a flow rate of the mixture of the fuel and air to be drawn in by the engine; a first throttle valve that is disposed in an intake pipe of the engine; a bypass passage that bypasses the first throttle valve; a second throttle valve that is disposed in the bypass passage; a starting phase determination means that determines whether the engine is in a pre-start phase or a post-start phase; a first opening setting means that sets the opening of the second throttle valve before starting; a second opening setting means that sets the opening of the second throttle valve after starting; and a target opening setting means that sets at least one target opening for the second throttle valve opening when the engine shifts from the pre-start phase to the post-start phase.