METHOD OF SETTING BASIC CONTROL QUANTITY OF INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To make it possible to set basic control quantities to high accuracies without increasing a main value of each of operation parameters by correcting the basic control quantities obtained with interpolative calculation according to interpolative correction values retrieved from stored data. CONSTITUTION:A control circuit 16 reads an engine revolution Ne with a crank angle sensor 13 and an absolute pressure PSA in an intake manifold with a sensor 11 and based on two main values embracing the Ne and PSA calculates a basic supply quantity TiM by means of linear interpolative calculation. An interpolative correction value Kim at an intermediate value between two main values Ni and Ni+1 embracing the Ne is retrieved by searching a data map stored in advance in a random access memory (ROM). Then, it is discriminated whether the engine revolution is greater than the intermediate value between the two main values Ni is greater than the intermediate value between the two main values Ni and Ni+1 and the result is used to further interpolate-correct the interpolative correction value Kim to obtain an interpolative correction value Ki and to obtain a basic supply quantity Ti with an operation of TimXKi. Thus, basic control quantities such as basic supply amount can be set with high accuracies.