Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1992-09-18
1993-10-26
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60284, 60286, 60300, 374144, 422174, 422180, 423212, 502527, F01N 328
Patent
active
052555119
ABSTRACT:
A method for operational monitoring of a catalytic converter of an exhaust system of an engine includes selecting at least two measurement locations at three-dimensionally spaced-apart cross-sectional regions of the exhaust system, and defining at least a partial volume of the catalytic converter between the locations being definitive for catalytic conversion of pollutants in the exhaust gas. The temperature at the regions is measured and monitored and the temperature at least at one of the locations is measured integrally over an approximately representative portion of at least one region and not spotwise. An apparatus for operational monitoring includes at least two temperature sensors disposed successively in flow direction in at least two regions of the exhaust system, defining at least the partial volume of the catalytic converter. At least one of the sensors integrally measures temperature over an approximately representative portion of the region in which it is disposed. An electronic monitoring apparatus evaluates measured temperature values. A display apparatus displays an evaluation outcome. A catalytic converter includes at least partially structured sheet-metal layers. At least one sensor is integrated into one of the structured sheet-metal layers in at least one cross-sectional region near at least one end surface, for integrally measuring temperature over an approximately representative portion of the one region.
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Bruck Rolf
Maus Wolfgang
Swars Helmut
Emitec Gesellschaft fuer Emissions-technologie
Greenberg Laurence A.
Hart Douglas
Lerner Herbert L.
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