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公开(公告)号：US20240151171A1
公开(公告)日：2024-05-09
申请号：US18273582
申请日：2022-01-20
Applicant: Scania CV AB
Inventor： Björn WESTERBERG , Ulf NYLÉN , Astrid SIMOVITS
CPC classification number: F01N3/035 , F01N3/108 , F01N3/208 , F01N9/007 , F01N2230/02 , F01N2900/1402 , F01N2900/1404
Abstract: A control device and a method for controlling an exhaust gas aftertreatment system comprising a diesel particulate filter is provided. The method comprises a step of, in response to a determination that a temperature of an exhaust gas entering the diesel particulate filter is equal to or below 325° C., controlling a NOx concentration of the exhaust gas entering the diesel particulate filter to be equal to or less than 600 ppm. An exhaust gas aftertreatment system as well as a vehicle comprising the control device are also described.
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公开(公告)号：US20220403768A1
公开(公告)日：2022-12-22
申请号：US17775619
申请日：2020-11-13
Applicant: Scania CV AB
Inventor： Mikael LUNDSTRÖM , Astrid SIMOVITS
Abstract: Disclosed is a method for diagnosing a first exhaust treatment component for treatment of an exhaust gas stream comprising means for oxidizing nitric oxide into nitrogen dioxide. A first reduction catalytic converter is arranged upstream said means for oxidizing nitric oxide into nitrogen dioxide, and a second reduction catalytic converter is arranged downstream said means. A reagent is for reduction of nitrogen oxides in said first catalytic converter, and a first sensor measures an occurrence of nitrogen oxide downstream said means but upstream said second reduction catalytic converter. The method comprises: causing a supply of reagent upstream said first reduction catalytic converter to an extent exceeding the extent to which reagent is consumed by the first reduction catalytic converter, determining a first measure of the occurrence of reagent downstream said means for oxidizing, and diagnosing said means for oxidizing nitric oxide into nitrogen dioxide based on said first measure.
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