Method and arrangement for the open-loop and/or close-loop control of an operating variable of an internal combustion engine

A method for controlling an operating variable of an internal combustion engine of a motor vehicle, via at least one transfer element, said transfer element fixing the relationship between input and output variables in the form of a characteristic curve or a characteristic field, said transfer element being an electrically actuable actuator, which influences said operating variable and which is driven by the control, said actuator fixing the relationship between drive variable and a variable representing this operating variable in the form of a characteristic curve or a characteristic field and said method carrying out an adaptation of the control to changing operating conditions in that the characteristic curve or characteristic field is adapted by adaptation to the changing conditions, the method comprising the steps of:

• performing the adaptation in such a manner that at least one region of the characteristic curve or characteristic field is rotated above a pregiven point specific to the engine and disposed outside of the characteristic curve or characteristic field;
• and,
• determining said point by a fictive value of the operating variable for the drive variable zero on the basis of at least one region of the characteristic curve or of the characteristic field.

A method for controlling an operating variable of an internal combustion engine of a motor vehicle, via at least one transfer element, said transfer element fixing the relationship between input and output variables in the form of a characteristic curve or a characteristic field, said transfer element being an electrically actuable actuator, which influences said operating variable and which is driven by the control, said actuator fixing the relationship between drive variable and a variable representing this operating variable in the form of a characteristic curve or a characteristic field and said method carrying out an adaptation of the control to changing operating conditions in that the characteristic curve or characteristic field is adapted by adaptation to the changing conditions, the method comprising the step of:

• performing the adaptation in such a manner that at least one region of the characteristic curve or characteristic field is rotated about a pregiven point specific to the engine and disposed outside of the characteristic curve or characteristic field only outside of the start case of the engine in the idle operating phase thereof when the load of the engine drops below a pregiven threshold value.

An arrangement for controlling an operating variable of an internal combustion engine of a motor vehicle, with a transfer element, said transfer element fixing the relationship between input and output variables in the form of a characteristic curve or a characteristic field, said transfer element being an electrically actuable actuator, which represents said operating variable and which is driven by the control, said actuator fixing the relationship between drive variable and a variable representing this operating variable in the form of a characteristic curve or a characteristic field and an adaptation unit which performs an adaptation of the control to changing operating conditions in that the characteristic curve or characteristic field is adapted by adaptation to the changing conditions, the arrangement comprising means for performing the adaptation so as to cause at least one region, which is to be adapted, of the characteristic or characteristic field to rotate about a pregiven point (A, A') of rotation determined by said transfer element;

• and,
• said point (A, A') of rotation representing an output variable (Q) which would result for said region for a characteristic value of said drive variable (.tau.).

An arrangement for controlling an operating variable of an internal combustion engine of a motor vehicle, with a transfer element, said transfer element fixing the relationship between input and output variables in the form of a characteristic curve or a characteristic field, said transfer element being an electrically actuable actuator, which influences said operating variable and which is driven by the control, said actuator fixing the relationship between drive variable and a variable representing this operating variable in the form of a characteristic curve or a characteristic field and an adaptation unit which performs an adaptation of the control to changing operating conditions in that the characteristic curve or characteristic field is adapted by adaptation to the changing conditions, the arrangement comprising:

• means for performing the adaptation in such a manner that at least one region of the characteristic curve or characteristic field is rotated about a pregiven point specific to the engine and disposed outside of the characteristic curve or characteristic field;
• and,
• means for determining a point (A) by a fictive value of the operating variable for the drive variable zero on the basis of at least one region of the characteristic curve or of the characteristic field.

A method for controlling an operating variable of an internal combustion engine of a motor vehicle, via at least one transfer element, said transfer element fixing the relationship between input and output variables in the form of a characteristic curve or a characteristic field, said transfer element being an electrically actuable actuator, which influences said operating variable and which is driven by the control, said actuator fixing the relationship between drive variable and operating variable or a variable representing this operating variable in the form of a characteristic curve or a characteristic field and said method carrying out an adaptation of the control to changing operating conditions in that the characteristic curve or characteristic field is adapted by adaptation to the changing conditions, the method comprising the step of performing the adaptation so that at least one region of the characteristic curve or characteristic field is rotated about a pregiven point specific to the engine or the actuator and disposed outside of the characteristic curve or characteristic field and this pivot point being adaptable within the context of a long-term adaptation.

An arrangement for controlling an operating variable of an internal combustion engine of a motor vehicle, with a transfer element, said transfer element fixing the relationship between input and output variables in the form of a characteristic curve or a characteristic field, said transfer element being an electrically actuable actuator, which influences said operating variable and which is driven by the control, said actuator fixing the relationship between drive variable and operating variable or a variable representing this operating variable in the form of a characteristic curve or a characteristic field and an adaptation unit which performs an adaptation of the control to changing operating conditions in that the characteristic curve or characteristic field is adapted by adaptation to the changing conditions, the arrangement comprising means for performing the adaptation in such a manner that at least one region of the characteristic curve or characteristic field is rotated about a pregiven point specific to the engine or to the actuator and disposed outside of the characteristic curve or characteristic field, and this pivot point being adaptable within the context of a long-term adaptation.