IMethod and Device for Operating an Internal Combustion Engine
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Abstract
In a method and a device for operating an internal combustion engine, with at least one cylinder (Z1-Z4) having a combustion chamber (26), fuel is injected into the cylinder and a logic value (LV_FCUT) is set, in particular for stopping the injection of fuel into the cylinder, The method furthermore has the following steps: depending on a course of the highly time-resolved measurement signal of a rotational speed (N_FAST) of the internal combustion engine, a local maximum value (N_FAST_MAX) of the rotational speed is determined, a rotational speed difference (N_FAST_DIF) between the local maximum value (N_FAST_MAX) and a current measured value (N_FAST_MES) of the rotational speed is determined, and, depending on the determined rotational speed difference (N_FAST_DIF), the logic value (LV_FCUT) is set.
23 Citations
15 Claims
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1-8. -8. (canceled)
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9. A method for operating an internal combustion engine which has at least one cylinder with a combustion chamber, comprising:
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injecting fuel into the at least one cylinder; receiving a measurement signal of a rotational speed of the internal combustion engine, the measurement signal of the rotational speed defining a series of increases and decreases in the rotational speed; determining, based on the series of increases and decreases in the rotational speed, a local maximum value and a corresponding local minimum value of a rotational speed of the internal combustion engine; determining a rotational speed difference between the local maximum value and the local minimum value of the rotational speed; and controlling a supply of fuel to the at least one cylinder based on the determined rotational speed difference between the local maximum value and the local minimum value of the rotational speed. - View Dependent Claims (10, 11)
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12. A controller for operating an internal combustion engine having at least one cylinder with a combustion chamber into which fuel is injected, wherein the controller:
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receives a measurement signal of a rotational speed of the internal combustion engine, the measurement signal of the rotational speed defining a series of increases and decreases in the rotational speed; determines, based on the series of increases and decreases in the rotational speed, a local maximum value and a corresponding local minimum value of a rotational speed of the internal combustion engine; determines a rotational speed difference between the local maximum value and the local minimum value of the rotational speed; and controls a supply of fuel to the at least one cylinder based on the determined rotational speed difference between the local maximum value and the local minimum value of the rotational speed. - View Dependent Claims (13)
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14. An internal combustion engine, comprising:
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at least one cylinder having a combustion chamber into which fuel is injected; and a controller operating to; receive a measurement signal of a rotational speed of the internal combustion engine, the measurement signal of the rotational speed defining a series of increases and decreases in the rotational speed; determine, based on the series of increases and decreases in the rotational speed, a local maximum value and a corresponding local minimum value of a rotational speed of the internal combustion engine; determine a rotational speed difference between the local maximum value and the local minimum value of the rotational speed; and control a supply of fuel to the at least one cylinder based on the determined rotational speed difference between the local maximum value and the local minimum value of the rotational speed. - View Dependent Claims (15)
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Specification