Patent ID: 6012431
Filing Date: 2000-01-11
Classification: F02D,Y02T

Abstract:
A control apparatus for an internal combustion engine comprising:driving condition detecting means for detecting at least an engine speed, an opening of an accelerator, an amount of an intake air and an EGR amount as an engine operating condition;standard volume for injecting fuel oil calculating means for calculating a standard volume for injecting fuel oil on the basis of at least said engine speed and said opening of the accelerator;maximum volume for injecting fuel oil calculating means for calculating a possible maximum volume for injecting fuel oil on the basis of said amount of intake air and said EGR amount;volume for injecting fuel oil setting means for setting a final volume for injecting fuel oil by comparing said standard volume for injecting fuel oil and said maximum volume for injecting fuel oil and selecting the smaller one;volume for injecting fuel oil control means for controlling a volume for injecting fuel oil to the engine in accordance with said final volume for injecting fuel oil;standard target EGR rate calculating means for calculating a standard target EGR rate on the basis of said engine speed, said amount of the intake air and said standard volume for injecting fuel oil;target EGR rate adjusting means for adjusting said standard target EGR rate in accordance with at least rate of said final volume for injecting fuel oil with respect to said standard volume for injecting fuel oil so as to obtain an adjusted target EGR rate; andEGR amount control means for controlling an amount of the EGR in accordance with said adjusted target EGR rate.