| 摘要 |
PROBLEM TO BE SOLVED: To meet the requirements of high responsiveness, converging capability, stability, and easiness of development of models requested for an idle rotational speed control at high grades in all speed ranges. SOLUTION: A deviationΔNE(i) between a present actual idle rotational speed NE(i) and a final target idle rotational speed NEtg(i) is calculated, and an attenuation factor Kdec is multiplied by the previous valueΔNE(i-1) of the deviation to provide the intermediate target valueΔNEmidtg(i) of the deviation (steps 104, 105). Then, by using a deviation E between this valueΔNE(i) and the intermediate target valueΔNEmidth(i) of the deviation, an ISC corrected value NEcomp(i) is calculated by using the following expression (steps 106, 107). NEcomp (i)=Kp×E+f(NEtg(i)). Where Kp is a proportinal gain. f(NEtg(i)) is calculated by using a map or an expression using the final target idle rotational speed NEtg(i) as a parameter. COPYRIGHT: (C)2003,JPO
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