Patent ID: 6460514
Filing Date: 2002-10-08
Classification: F02D,Y02T

Abstract:
A device for controlling a fuel injection quantity for an internal combustion engine equipped with a turbocharger, comprising:(a) failure judgment means for judging whether or not a mechanism for adjusting a supercharged pressure is failed; (b) normal time fuel injection quantity computing means for computing a fuel injection quantity of normal time based upon the engine operation condition when it is judged that the adjustment mechanism is not failed; (c) failed time fuel injection quantity computing means for computing a fuel injection quantity of failed time smaller than the fuel injection quantity of normal time based upon the engine operation condition when it is judged that the adjustment mechanism is failed, said failed time fuel injection quantity computing means including (1) first fuel injection quantity computing means for computing a first fuel injection quantity of when an accelerator is fully opened based upon the engine operation condition; (2) second fuel injection quantity computing means for computing a second fuel injection quantity smaller than the fuel injection quantity of normal time based upon the engine operation condition; and (3) fuel injection quantity selection means for selecting the smaller value between the first fuel injection quantity and the second fuel injection quantity as the fuel injection quantity of failed time; and (d) fuel injection control means for controlling the fuel injection based upon the computed fuel injection quantity of normal time or upon the fuel injection quantity of failed time.