Method for metering a reagent into the exhaust gas flow of an internal combustion engine
OwnerMichael Gerlachinventor
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Abstract
A method for metering a reagent into the exhaust gas flow of an internal combustion engine is provided, in which the reagent is guided in at least one component and in which a measure for the temperature of the component is recorded. The measure for the temperature is compared to a predefined temperature threshold value. A counter counts the number of times the threshold is exceeded. If the counter state exceeds a predefined count threshold value, a service signal is emitted. The temperature threshold value is fixed, for example, at the freezing temperature of the reagent. One embodiment provides that the counter counts an exceeding of the temperature threshold value only when the component is filled with the reagent.
Claims11
1-10. (canceled)
A method for metering a reagent into an exhaust gas flow of an internal combustion engine, the method comprising:
- guiding the reagent in at least one component;
- recording a measure for a temperature of the component;
- comparing the measure for the temperature to a predefined temperature threshold value;
- counting a number of times the temperature threshold value is exceeded in a counter;
- predefining a count threshold value for the number of times the temperature threshold value is exceeded;
- and
- making available a service signal in response to an exceeding of the count threshold value.
Dependencies are inferred from the claim text.