초록 ▼

In the optimum control for an internal combustion engine wherein the engine is operated by dithering a value of a selected one of engine operating control variables from a value of the selected control variable which is obtained by calculation in accordance with detected values of operating paramete

In the optimum control for an internal combustion engine wherein the engine is operated by dithering a value of a selected one of engine operating control variables from a value of the selected control variable which is obtained by calculation in accordance with detected values of operating parameters of the engine, and a direction of improving either one of a fuel consumption rate and an output of the engine is decided on the basis of a detected change of an engine operating condition, thereby correcting the calculated value of the selected control variable, during the time period of each dithered engine operation, an engine speed is detected two or more times and used for deciding the direction of a change of the engine speed, thereby providing an improved optimum control method and apparatus for internal combustion engines capable of preventing undesired correction control of the control variable from being effected in response to a change of the engine speed caused by any factor of disturbance.

대표청구항 ▼

In an optimum control method for an internal combustion engine comprising the steps of: calculating a value of one of plural control variables of said engine in response to an operating condition of said engine; dithering the value of said control variable with a predetermined value from the calcula

In an optimum control method for an internal combustion engine comprising the steps of: calculating a value of one of plural control variables of said engine in response to an operating condition of said engine; dithering the value of said control variable with a predetermined value from the calculated value of said control variable; operating said engine at the dithered value of said control variable; detecting a resulting change of a rotational speed of said engine during a predetermined time period; deciding a direction of changing the value of said control variable toward an optimum value thereof in accordance with a result of said detection; correcting the value of said control variable in said direction toward the optimum value thereof, the improvement wherein, during each period of the operation of said engine by dithering the value of said control variable, the rotational speed of said engine speed is detected two or more times thereby to decide a direction of the change thereof accurately.