Patent ID: 8820299
Filing Date: 2014-09-02
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel injection control system for an internal combustion engine in which fuel discharged from a low pressure fuel pump is supplied to a fuel injection valve with its pressure boosted by a high pressure fuel pump, comprising: a fuel pressure sensor that measures the pressure of fuel discharged from said high pressure fuel pump; a detection section that detects a discharge failure in said high pressure fuel pump, using as a parameter the amount of change in the measurement value of said fuel pressure sensor in relation to timing of operation of said high pressure fuel pump; a pressure increasing section that increases the discharge pressure of said low pressure fuel pump when said detection section detects a discharge failure in said high pressure fuel pump; and a determination section that determines that a fuel injection system including said high pressure fuel pump is in failure if said detection section detects a discharge failure in said high pressure fuel pump again after the discharge pressure of said low pressure fuel pump is increased by said pressure increasing section.