Method for operating an internal combustion engine
First Claim
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1. An exhaust gas treatment system for use with an internal combustion engine, comprising:
- at least one exhaust gas treatment device, said at least one exhaust gas treatment device being capable of regeneration through an exhaust gas temperature event;
a controller configured to operate the internal combustion engine, based on a method of;
determining a first distribution of values for at least one variable over a first time period, said at least one variable being one of a rotational speed of the internal engine, a speed of a driven device, an exhaust gas temperature, and exhaust gas volume, and an exhaust gas differential pressure, said first distribution of values describing a long-term behavior of the internal combustion engine;
recording and classifying values for the at least one variable over a second time period;
determining a second distribution of values for said at least one variable, said second distribution of values describing a short-term behavior of the internal combustion engine;
comparing the first distribution with the second distribution; and
triggering or not triggering said exhaust gas temperature event on the basis of the comparing step.
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Abstract
The invention relates to a method and an arrangement for operating an internal combustion engine. In the method a first distribution of values for at least one variable is used, the variable describing a physical property of the internal combustion engine, and over a second time period values for this variable are recorded and classified, such that a second distribution is determined. The first distribution is then compared with the second distribution such that the behavior of the internal combustion engine can be adapted on the basis thereof.
5 Citations
18 Claims
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1. An exhaust gas treatment system for use with an internal combustion engine, comprising:
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at least one exhaust gas treatment device, said at least one exhaust gas treatment device being capable of regeneration through an exhaust gas temperature event; a controller configured to operate the internal combustion engine, based on a method of; determining a first distribution of values for at least one variable over a first time period, said at least one variable being one of a rotational speed of the internal engine, a speed of a driven device, an exhaust gas temperature, and exhaust gas volume, and an exhaust gas differential pressure, said first distribution of values describing a long-term behavior of the internal combustion engine; recording and classifying values for the at least one variable over a second time period; determining a second distribution of values for said at least one variable, said second distribution of values describing a short-term behavior of the internal combustion engine; comparing the first distribution with the second distribution; and triggering or not triggering said exhaust gas temperature event on the basis of the comparing step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating an internal combustion engine, comprising the steps of:
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providing an exhaust gas treatment system including at least one exhaust gas treatment device, said at least one exhaust gas treatment device being capable of regeneration through an exhaust gas temperature event; determining a first distribution of values for at least one variable over a first time period, said at least one variable being one of a rotational speed of the internal engine, a speed of a driven device, an exhaust gas temperature, an exhaust gas volume, and an exhaust gas differential pressure, said first distribution of values describing a long-term behavior of the internal combustion engine; recording and classifying values for the at least one variable over a second time period; determining a second distribution of values for said at least one variable, said second distribution of values describing a short-term behavior of the internal combustion engine; comparing the first distribution with the second distribution; and triggering said exhaust gas temperature event on the basis of the comparing step. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification