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The systems and methods herein relate the operation of a particle filter which is arranged in an exhaust-gas path of an internal combustion engine, to a device for exhaust-gas aftertreatment which can be operated in accordance with the method that comprises determining a mass flow rate of an exhaust

The systems and methods herein relate the operation of a particle filter which is arranged in an exhaust-gas path of an internal combustion engine, to a device for exhaust-gas aftertreatment which can be operated in accordance with the method that comprises determining a mass flow rate of an exhaust-gas flow flowing in the exhaust-gas path; and supplying ambient air into the exhaust-gas path as a function of the determined mass flow rate. By this method, the spontaneous regeneration of a particle filter within the exhaust system may be abated.

대표청구항 ▼

1. An engine operating method, comprising: during controlled filter regeneration and during non-controlled regeneration conditions, supplying ambient air into an exhaust-gas path as a function of a mass flow rate of an exhaust-gas flow to a particle filter;increasing ambient air supplied to the exha

1. An engine operating method, comprising: during controlled filter regeneration and during non-controlled regeneration conditions, supplying ambient air into an exhaust-gas path as a function of a mass flow rate of an exhaust-gas flow to a particle filter;increasing ambient air supplied to the exhaust-gas path by a first amount if the mass flow rate has a first value; andincreasing ambient air supplied to the exhaust-gas path by a second amount if the mass flow rate has a second value which is lower than the first value, the second amount greater than the first amount, wherein the mass flow rate is determined by virtue of a load of an engine being determined,wherein a total mass flow rate through the particle filter is a function of the mass flow rate of the exhaust-gas flow and a supplied-air mass flow rate of the ambient air and is kept constant, and wherein ambient air is compressed before being supplied to the exhaust-gas path, an amount of ambient air supplied being inversely proportional to the supplied-air mass flow rate from the engine. 2. The method of claim 1, further comprising determining a substrate temperature of the particle filter, wherein a supply of ambient air into the exhaust-gas path is delivered additionally as a function of the substrate temperature. 3. The method of claim 2, in which a third amount of ambient air is supplied to the exhaust-gas path if the substrate temperature has a third value, and in which a fourth amount of ambient air which is greater than the third amount is supplied to the exhaust-gas path if the substrate temperature has a fourth value which is greater than the third value. 4. The method of claim 2, in which the exhaust-gas flow is interrupted if the substrate temperature exceeds a first threshold value. 5. The method of claim 4, in which the exhaust-gas flow is interrupted and ambient air is supplied to the exhaust-gas path until the substrate temperature falls below a second threshold value which is lower than the first threshold value. 6. The method of claim 1, in which a mixing valve for mixing the exhaust-gas flow and ambient air supplied is used to increase an exhaust-gas counterpressure. 7. An engine method, comprising: during a controlled filter regeneration, not injecting ambient air into exhaust and limiting an amount of excess oxygen from combusting cylinders based on filter temperature; andto avoid spontaneous filter regeneration during non-controlled regeneration conditions, injecting ambient air into exhaust without limiting the amount of excess oxygen from combusting cylinders, an amount of injected ambient air proportional to engine exhaust airflow, wherein injecting ambient air into exhaust without limiting the amount of excess oxygen is based on filter temperature exceeding a predetermined temperature threshold and wherein engine combustion is suspended by de-coupling the engine from an air intake, suspending fuel injection, or suspending ignition spark or compression ignition in response to the filter temperature exceeding the predetermined temperature threshold. 8. The method of claim 7, wherein ambient air is compressed before being supplied to exhaust. 9. The method of claim 7, wherein the exhaust airflow is determined by virtue of a load of an engine being determined. 10. The method of claim 7, wherein an amount of excess oxygen is further controlled to limit a size of a combustive reaction, a length of combustion, or heat produced by combustion. 11. The method of claim 7, wherein the engine is temporarily disabled in response to the filter temperature exceeding the predetermined temperature threshold, and the engine is maintained disabled until the filter temperature is less than a second temperature threshold, the second temperature threshold being lower than the predetermined temperature threshold. 12. The method of claim 7, wherein ambient air is inducted via a diffuser inlet. 13. An engine operating method, comprising: during controlled filter regeneration and during non-controlled regeneration conditions, supplying ambient air into an exhaust-gas path as a function of a mass flow rate of an exhaust-gas flow to a particle filter;increasing ambient air supplied to the exhaust-gas path by a first amount if the mass flow rate has a first value;increasing ambient air supplied to the exhaust-gas path by a second amount if the mass flow rate has a second value which is lower than the first value, the second amount greater than the first amount, wherein the mass flow rate is determined by virtue of a load of an engine being determined; anddetermining a substrate temperature of the particle filter, wherein a supply of ambient air into the exhaust-gas path is delivered additionally as a function of the substrate temperature, and where the exhaust-gas flow is interrupted if the substrate temperature exceeds a first threshold value. 14. The method of claim 13, wherein the exhaust-gas flow is interrupted and ambient air is supplied to the exhaust-gas path until the substrate temperature falls below a second threshold value which is lower than the first threshold value. 15. The method of claim 13, wherein ambient air is compressed before being supplied to the exhaust-gas path. 16. The method of claim 13, wherein an amount of excess oxygen is controlled to limit a size of a combustive reaction, a length of combustion, or heat produced by combustion. 17. The method of claim 13, wherein ambient air is inducted via a diffuser inlet.