LOW PRESSURE FEED PUMP CONTROL FOR A HIGH PRESSURE COMMON RAIL FUEL INJECTION SYSTEM

摘要

In a fuel supply apparatus for an internal combustion engine, fuel is delivered to a high pressure fuel pump (7) driven by an internal combustion engine, using an electrically-operated low pressure fuel pump (6), and the fuel pressurized by the high pressure fuel pump (7) is supplied to the internal combustion engine. The fuel supply apparatus includes a low pressure pump control portion (42) that controls the low pressure fuel pump (6) to avoid a discharge failure in the high pressure fuel pump (7) due to insufficiency of a feed pressure at which the low pressure fuel pump (6) delivers the fuel to the high pressure fuel pump (7). The low pressure pump control portion (42) stops the low pressure fuel pump (6) in a case where the discharge failure in the high pressure fuel pump (7) is avoided even when the feed pressure is equal to a gauge pressure of 0.