| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply control device that enables enhancement of correction accuracy of port injection amount by considering a pressure wave from a fuel pressure pump and a pressure pulsation component caused by reflection of the pressure wave.SOLUTION: A fuel supply control device is mounted to an internal combustion engine including: a low pressure fuel injection mechanism having low pressure fuel piping and a low pressure fuel injection valve for injecting fuel from the low pressure fuel piping; and a high pressure fuel injection mechanism that has a fuel pressure pump for sucking and pressurizing fuel from the low pressure fuel piping, high pressure fuel piping supplied with the pressurized fuel and a high pressure fuel injection valve for injecting the fuel from the high pressure fuel piping. The fuel supply control device controls fuel injection amounts at least by the low pressure fuel injection valve and the high pressure fuel injection valve. The fuel supply control device estimates delivery fuel pressure Pd on the basis of a first pressure fluctuation component Pc1 that is transmitted from the fuel pressure pump to inside of the low pressure fuel piping and transferred to the low pressure fuel injection valve side and a second pressure fluctuation component Pc2 that is reflected within the low pressure fuel piping, then reciprocated within the piping and transmitted again to the low pressure fuel injection valve side, and controls the fuel injection amount by the low pressure fuel injection valve. |
