| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for specifying which of two fuel injection valves fails in a fuel injection device which has two fuel injection valves in each cylinder and switches between premixed combustion operation and diffuse combustion operation of an internal combustion engine through the utilization of these two fuel injection valves. SOLUTION: In the failure determination method of a fuel injection device, when generating torque of an internal combustion engine becomes lower than an allowable range in a premixed combustion operation region, valve opening failure of a first fuel injection valve (S108) is determined when the absolute value of the difference between an actual fuel injection volume of each cylinder and target injection volume of a first fuel injection valve (a side injector) is larger than the absolute value of the difference between an actual fuel injection volume of each cylinder and target injection volume of a second fuel injection valve (a center injector), and valve opening failure of a second fuel injection valve (S106) is determined when the absolute value of the difference between an actual fuel injection volume of each cylinder and target injection volume of the second fuel injection valve is larger than the absolute value of the difference between an actual fuel injection volume of each cylinder and target injection volume of the first fuel injection valve. COPYRIGHT: (C)2007,JPO&INPIT
|
