EXHAUST-GAS EMISSION CONTROL SYSTEM COMPRISING A FILTER FUNCTION AND DIAGNOSTIC METHOD FOR SAID SYSTEM
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United States of America Patent
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Issued Date -
Oct 31, 2019
app pub date -
Jun 23, 2017
filing date -
Jun 23, 2016
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Abstract
An apparatus for exhaust gas purification comprises a filter function. The apparatus includes a gas-permeable substrate which forms a wall-flow filter that forms channels. The channels are sealed at least at one end and exhaust gas is flowable through the channels and gas-permeable channel walls of the channels formed from the substrate. A surface of the substrate is provided with an oxygen-storing coating. The mass of an oxygen-storing material coated on the surface of the substrate on an outflow side is higher than the mass of the oxygen-storing material coated on the surface of the substrate on an inflow side.
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