Patent ID: 7269941
Filing Date: 2007-09-18
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. A fuel injection control apparatus for an internal combustion engine, wherein the engine has an in-cylinder injection valve for injecting fuel into a cylinder of the engine, an intake passage injection valve for injecting fuel into an intake passage connected to the cylinder, and an exhaust passage connected to the cylinder, the apparatus comprising: a temperature determining section that determines whether the temperature of a component located in the exhaust passage is higher than or equal to a predetermined temperature; and an injection control section that controls the in-cylinder injection valve and the intake passage injection valve, wherein, when the temperature of the component is higher than or equal to the predetermined temperature, the injection control section increases, without changing the total amount of fuel supplied to the cylinder, the ratio of a fuel injection amount of the intake passage injection valve to a fuel injection amount of the in-cylinder injection valve compared to a case where the temperature of the component is not higher than or equal to the predetermined temperature, thereby preventing the component from being overheated.