Method and device for measuring the emissions of engines
AssigneeTesto AG
InventorsJoséLuis Miguez Tabares, Santiago Murillo Zapatero, Knut Hoyer
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Abstract
The invention relates to a method and a device for determining specific emissions as an exhaust gas characteristic of an internal combustion engine. Said method is characterized in that the exhaust gas mass flow (3) is determined as the first operating parameter and the engine power output (2) as the second operating parameter, the nitrous oxide mass flow (3) and the engine power output (2) are derived from a respective measured value that deviates from the operating parameter and the exhaust gas characteristic is calculated as a quotient from the corrected exhaust gas mass flow (3) and the engine power output (2).
Claims40
Device for determining specific emissions of an internal combustion engine, characterized by the fact that the device includes:
- means (30, 31, 35, 36) for acquiring a first operating parameter and a second operating parameter, wherein said means including means for determining and/or inputting fuel parameters and specific fuel consumption of the internal combustion engine,
- a measured value acquisition unit (32), and
- computer (33) that is suitable for calculating the specific emissions from the operating parameters,
- wherein the first operating parameter is emission mass flow (3) of the internal combustion engine, and the second operating parameter is engine output power (2) of the internal combustion engine,
- wherein exhaust gas measured values (38) are passed onto the measured value acquisition unit (32), and
- wherein the engine output power (2) is determined based on fuel mass flow and specific fuel consumption of the internal combustion engine.
Method for determining specific emissions of an internal combustion engine, characterized by,
- determining emission mass flow (3) of the internal combustion engine as a first operating parameter;
- determining engine power output (2), based on fuel mass flow (21, 26) and specific fuel consumption (22), of the internal combustion engine as a second operating parameter, wherein, said first and second operating parameters are each determined based on at least one measurement variable which is physically different from respective said operating parameter;
- and
- calculating a specific emission as the quotient of the emission mass flow corrected by a moisture correction factor for NOx (29) and the engine output power (2).
Dependencies are inferred from the claim text.