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公开(公告)号：US20220090566A1
公开(公告)日：2022-03-24
申请号：US17481807
申请日：2021-09-22
摘要： An internal combustion engine system, including an internal combustion engine (ICE), an exhaust aftertreatment system (EATS) located downstream of said ICE. An exhaust gas recirculation (EGR) pump arranged in an exhaust gas recirculation duct extending between the ICE and EATS, wherein the ICE system has a normal operation mode for transporting, by means of the EGR pump, at least a portion of said exhaust gas to upstream of the ICE. The ICE system further includes a heating device arranged upstream of at least one exhaust aftertreatment devices of said EATS and the ICE system has a pre-heat operation mode for transporting, by means of the EGR pump, exhaust gas and/or air through said heating device and then to said at least one of said exhaust aftertreatment devices.
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公开(公告)号：US11702973B2
公开(公告)日：2023-07-18
申请号：US17664336
申请日：2022-05-20
发明人： Jonas Jansson , Björn Henriksson , Lars Carlhammar
CPC分类号： F01N3/208 , F01N3/035 , F01N3/2066 , F01N13/009 , F01N13/0093 , F01N2250/02 , F01N2560/026 , F01N2570/14 , F01N2590/08 , F01N2610/02 , F01N2610/146 , F01N2900/14 , F01N2900/1402 , F01N2900/1812
摘要： A method for controlling urea injection in an exhaust aftertreatment system includes injecting urea at a flow rate upstream of the first catalytic reduction device; measuring a level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device; controlling the flow rate of the urea injection until the measured level of nitrogen oxides fulfils a predetermined condition; if the measured level of nitrogen oxides is decreasing in response to reducing the flow rate of the urea injection, reducing the flow rate of the urea injection, and controlling a flow rate of urea injection using the second urea injector upstream of the second catalytic reduction device according to the measured level of nitrogen oxides downstream of the first catalytic reduction device and upstream of the second catalytic reduction device.
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公开(公告)号：US11692500B2
公开(公告)日：2023-07-04
申请号：US17481807
申请日：2021-09-22
CPC分类号： F02D41/0255 , F01N3/2006 , F01N9/00 , F02D41/0055 , F02D41/024 , F02M26/06 , F02M26/15 , F02M26/34 , F02M26/35 , F01N3/2013 , F01N3/2033 , F01N2240/14 , F01N2240/16
摘要： An internal combustion engine system, including an internal combustion engine (ICE), an exhaust aftertreatment system (EATS) located downstream of said ICE. An exhaust gas recirculation (EGR) pump arranged in an exhaust gas recirculation duct extending between the ICE and EATS, wherein the ICE system has a normal operation mode for transporting, by means of the EGR pump, at least a portion of said exhaust gas to upstream of the ICE. The ICE system further includes a heating device arranged upstream of at least one exhaust aftertreatment devices of said EATS and the ICE system has a pre-heat operation mode for transporting, by means of the EGR pump, exhaust gas and/or air through said heating device and then to said at least one of said exhaust aftertreatment devices.
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公开(公告)号：US11268415B2
公开(公告)日：2022-03-08
申请号：US16615273
申请日：2017-06-02
发明人： Soran Shwan , Lars Carlhammar , Fredrik Blomgren
摘要： The invention relates to a method for controlling the temperature of an NOx controlling component in an exhaust after treatment system of an internal combustion engine. The NOx controlling component has inner surface portions defining an interior component space through which exhaust gases are arranged to flow in order to be NOx controlled, and has outer surface portions facing away from the interior component space. The method comprises the step of: controlling the temperature of at least a portion of the NOx controlling component by a heat transfer medium arranged outside of the outer surface portions. The invention also relates to an exhaust after treatment system and a vehicle with such a system.
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