Method for operating an internal combustion engine
First Claim
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1. A method for operating an internal combustion engine, comprising:
- ascertaining at least one rotation variable characterizing a rotational movement of a crankshaft cylinder-specifically; and
adapting, in an operating state in which at least one of differences and fluctuations of the rotation variable are a function of a combustion position, at least one of i) an instant of a fuel injection, ii) a fresh-air volume, and iii) an exhaust-gas recirculation rate to reduce the at least one of the differences and fluctuations,wherein, in an initial operating state in which the at least one of the differences and fluctuations of the rotation variable are not a function of the combustion position, an injected fuel quantity is adapted cylinder-specifically to reduce the at least one of the differences and fluctuations.
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Abstract
In an internal combustion engine, at least one rotation variable characterizing the rotational movement of a crankshaft is ascertained cylinder-specifically. It is provided that, in an operating state in which differences and/or fluctuations of the rotation variable are basically a function of a combustion position, the instant of a fuel injection is adapted cylinder-specifically in order to reduce the differences and or fluctuations.
21 Citations
9 Claims
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1. A method for operating an internal combustion engine, comprising:
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ascertaining at least one rotation variable characterizing a rotational movement of a crankshaft cylinder-specifically; and adapting, in an operating state in which at least one of differences and fluctuations of the rotation variable are a function of a combustion position, at least one of i) an instant of a fuel injection, ii) a fresh-air volume, and iii) an exhaust-gas recirculation rate to reduce the at least one of the differences and fluctuations, wherein, in an initial operating state in which the at least one of the differences and fluctuations of the rotation variable are not a function of the combustion position, an injected fuel quantity is adapted cylinder-specifically to reduce the at least one of the differences and fluctuations. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A storage medium storing a computer program, the computer program, when executed by a control device, causing the device to perform the steps of:
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ascertaining at least one rotation variable characterizing a rotational movement of a crankshaft cylinder-specifically; and adapting, in an operating state in which at least one of differences and fluctuations of the rotation variable are a function of a combustion position, at least one of i) an instant of a fuel injection, ii) a fresh-air volume, and iii) an exhaust-gas recirculation rate to reduce the at least one of the differences and fluctuations, wherein, in an initial operating state in which the at least one of the differences and fluctuations of the rotation variable are not a function of the combustion position, an injected fuel quantity is adapted cylinder-specifically to reduce the at least one of the differences and fluctuations.
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9. A control device for an internal combustion engine, the control device adapted to perform the steps of:
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ascertaining at least one rotation variable characterizing a rotational movement of a crankshaft cylinder-specifically; and adapting, in an operating state in which at least one of differences and fluctuations of the rotation variable are a function of a combustion position, at least one of i) an instant of a fuel injection, ii) a fresh-air volume, and iii) an exhaust-gas recirculation rate to reduce the at least one of the differences and fluctuations, wherein, in an initial operating state in which the at least one of the differences and fluctuations of the rotation variable are not a function of the combustion position, an injected fuel quantity is adapted cylinder-specifically to reduce the at least one of the differences and fluctuations.
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Specification