초록 ▼

An engine has an improved fuel injection control apparatus the pressure boosting and method that prevents misfire and prevents unburned fuel from entering the exhaust system. The fuel injection system has two pumps, a primary pump and a booster pump. When an abnormality occurs in the booster pump, i

An engine has an improved fuel injection control apparatus the pressure boosting and method that prevents misfire and prevents unburned fuel from entering the exhaust system. The fuel injection system has two pumps, a primary pump and a booster pump. When an abnormality occurs in the booster pump, it is stopped, and fuel injection is performed by the primary pump. When the booster pump is stopped, a fuel injection valve or an air intake device is regulated such that the air/fuel mixture formed in the combustion chambers will not misfire, and unburned fuel will not remain and enter the exhaust system.

대표청구항 ▼

1. A control apparatus for an engine, wherein the engine burns a mixture of air drawn into and fuel injected into a combustion chamber, the apparatus comprising:a fuel injection valve for injecting fuel directly into the combustion chamber; an air intake passage for delivering air to the combustion

1. A control apparatus for an engine, wherein the engine burns a mixture of air drawn into and fuel injected into a combustion chamber, the apparatus comprising:a fuel injection valve for injecting fuel directly into the combustion chamber; an air intake passage for delivering air to the combustion chamber; a primary fuel pump for pressurizing fuel destined for the fuel injection valve; a secondary fuel pump, which further pressurizes fuel that has been pressurized by the primary fuel pump and supplies the further pressurized fuel to the fuel injection valve; a computer for controlling the primary fuel pump, wherein the computer stops the secondary fuel pump such that the fuel injection valve performs fuel injection with fuel from the primary fuel pump, at a pressure produced by the primary fuel pump, when there is an abnormality concerning the secondary fuel pump, wherein the computer computes an amount of fuel to be injected from the fuel injection valve based on a running state of the engine, wherein, if the computed fuel injection amount is greater than a predetermined allowable value when the secondary fuel pump is not operating, the computer prevents fuel injection by the fuel injection valve to prevent a mixture that may cause a misfire from being formed in the combustion chamber.