Electronic control for an internal combustion engine control parameter value setting device and an electronic control for an internal combustion engine control parameter value setting method

摘要

PROBLEM TO BE SOLVED: To provide a control parameter value setting device and its method for an electronically controlled internal combustion engine, which can set up optimum parameters using much less data.;SOLUTION: A first and a second initial value S1 and S2 finely different are used as a control parameter value (x) so as to allow each response value y1 and y2 to be given, and when an optimum parameter value Mx can be estimated to be smaller than each initial value S1 and S2 based on the size of each response value, a specified lower limit side limiting value A is made the control pressure value (x), and when Mx can be estimated to be greater than each initial value S1 and S2, a specified upper limit side limiting value B is made the control parameter value (x), and a response value y3 corresponding to each limiting value A and B, can thereby be obtained. When the response value y3 is better than each response value y1 and y2 corresponding to each initial value S1 and S2, the limiting value A or B is set to be the optimum control parameter value Mx, and when the response value y3 is not better than each response value y1 and y2 corresponding to each initial value S1 and S2, it is determined that the optimum control parameter Mx must be in between the limiting value A and the initial value S1, or in between the initial value S2 and the limiting value B, so that Mx is thereby obtained by means of curve approximation.;COPYRIGHT: (C)2000,JPO