Method for operating an internal combustion engine, and a control device therefor
First Claim
1. A method of monitoring operation of an internal combustion engine by evaluating an engine speed of the internal combustion engine, comprising:
- determining an acceleration characteristic for each of at least a first considered cylinder and a second considered cylinder of the engine, wherein the acceleration characteristic is determined based on a difference of engine speed values of two directly successive working cycles, and wherein at least one of the two directly successive working cycles corresponds to a working cycle of one of the first considered cylinder and the second considered cylinder;
selecting the acceleration characteristic of at least one of the first considered cylinder and the second considered cylinder based on at least one specified criterion; and
modifying at least one error characteristic provided for the cylinder having the selected acceleration characteristic, wherein the modification is based on the selected acceleration characteristic.
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Accused Products
Abstract
A method of monitoring proper operation of an internal combustion engine by analyzing an engine speed includes the following steps: determination of an acceleration characteristic for each cylinder, which is a function of the engine acceleration between preferably directly successive working cycles of a specifiable number of examined cylinders; selection of the acceleration characteristics of one or a plurality of cylinders on the basis of specifiable criteria; and modification of an error characteristic provided for each examined cylinder as a function of the acceleration characteristic assigned to the cylinder, if an acceleration characteristic assigned to the cylinder has been selected.
18 Citations
12 Claims
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1. A method of monitoring operation of an internal combustion engine by evaluating an engine speed of the internal combustion engine, comprising:
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determining an acceleration characteristic for each of at least a first considered cylinder and a second considered cylinder of the engine, wherein the acceleration characteristic is determined based on a difference of engine speed values of two directly successive working cycles, and wherein at least one of the two directly successive working cycles corresponds to a working cycle of one of the first considered cylinder and the second considered cylinder; selecting the acceleration characteristic of at least one of the first considered cylinder and the second considered cylinder based on at least one specified criterion; and modifying at least one error characteristic provided for the cylinder having the selected acceleration characteristic, wherein the modification is based on the selected acceleration characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-readable storage medium storing a computer-executable program configured to perform, when executed on a computer, a method of monitoring operation of an internal combustion engine by evaluating an engine speed of the internal combustion engine, comprising:
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determining an acceleration characteristic for each of at least a first considered cylinder and a second considered cylinder of the engine, wherein the acceleration characteristic is determined based on a difference of engine speed values of two directly successive working cycles, and wherein at least one of the two directly successive working cycles corresponds to a working cycle of one of the first considered cylinder and the second considered cylinder; selecting the acceleration characteristic of at least one of the first considered cylinder and the second considered cylinder based on at least one specified criterion; and modifying at least one error characteristic provided for the cylinder having the selected acceleration characteristic, wherein the modification is based on the selected acceleration characteristic.
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12. A control device for monitoring operation of an internal combustion engine by evaluating an engine speed of the internal combustion engine, comprising:
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means for determining an acceleration characteristic for each of at least a first considered cylinder and a second considered cylinder of the engine, wherein the acceleration characteristic is determined based on a difference of engine speed values of two directly successive working cycles, and wherein at least one of the two directly successive working cycles corresponds to a working cycle of one of the first considered cylinder and the second considered cylinder; means for selecting the acceleration characteristic of at least one of the first considered cylinder and the second considered cylinder based on at least one specified criterion; and means for modifying at least one error characteristic provided for the cylinder having the selected acceleration characteristic, wherein the modification is based on the selected acceleration characteristic.
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Specification