Patent ID: 7389766
Filing Date: 2008-06-24
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel supply apparatus for an internal combustion engine having first fuel injection means for injecting fuel into a cylinder, and second fuel injection means for injecting fuel into an intake manifold, a high-pressure fuel system for supplying the fuel to said first fuel injection means including a high-pressure fuel pump, the fuel supply apparatus comprising: means for controlling the fuel injection means such that fuel injection is carried out using one or both of said first and second fuel injection means based on a condition required for said internal combustion engine; and control means for controlling said high-pressure fuel pump, said control means including means for controlling said high-pressure fuel pump such that the fuel is supplied from said high-pressure fuel pump, even in a region where said first fuel injection means is stopped, through a high-pressure delivery pipe past the first fuel injection means and portions thereof returned through a return pipe connected to a fuel tank to control the temperature of the first fuel injection means to be equal to or less than a predetermined temperature through circulation of the fuel.