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公开(公告)号：US10473020B2
公开(公告)日：2019-11-12
申请号：US15218639
申请日：2016-07-25
发明人： Xiaogang Zhang
摘要： Methods and systems are provided for reducing engine emissions using a branched exhaust system. In one example, a branched exhaust system may include a plurality of sub-branches each housing a distinct exhaust component, and an order of exhaust flow through each of the exhaust components may be adjusted based on engine operating conditions and temperature demand of the distinct components.
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公开(公告)号：US10428711B2
公开(公告)日：2019-10-01
申请号：US15499327
申请日：2017-04-27
发明人： Xiaogang Zhang
摘要： Methods and systems are provided for an exhaust gas mixer. In one example, a system may comprise an outer annular portion exterior to an exhaust pipe and an inner annular portion interior to the exhaust pipe, where the outer annular portion comprises a spiral fin extending around the exhaust pipe in a downstream direction.
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公开(公告)号：US10408169B2
公开(公告)日：2019-09-10
申请号：US15460020
申请日：2017-03-15
发明人： Xiaogang Zhang
摘要： Methods and systems are provided for an exhaust gas recirculation mixer. In one example, a mixer may include a separate chambers configured to receive exhaust gas and intake gas, and where the exhaust gas and intake gas merge in an outlet of the mixer. The outlet of the mixer is located at an intersection of upstream and downstream surfaces of the mixer.
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公开(公告)号：US10393640B2
公开(公告)日：2019-08-27
申请号：US15243754
申请日：2016-08-22
发明人： Xiaogang Zhang
摘要： Methods and systems are provided for sensing particulate matter by a particulate matter (PM) sensor positioned upstream, or downstream, of a diesel particulate filter in an exhaust system. The PM sensor may include first and second conductive matrixes each having a three dimensional shape. The first matrix functions as a positive electrode, and the second functions as a negative electrode. Each matrix defines extensions and/or passages passing respectively through, and/or near, each other to form multiple soot capturing gaps. A first of the multiple soot capturing gaps is oriented orthogonal to a second of the multiple soot capturing gaps.
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公开(公告)号：US20190107060A1
公开(公告)日：2019-04-11
申请号：US16215359
申请日：2018-12-10
发明人： Xiaogang Zhang
摘要： Methods and systems are provided for operating a branched exhaust assembly in a vehicle engine in order to increase catalyst efficiency and reduce engine emissions. In one example, a method may include, during a cold-start condition, flowing exhaust first through a three-way catalyst then through an underbody converter, then through a heat exchanger and then through a turbine, each exhaust component housed on different branches on the branched exhaust assembly. After catalyst activation, exhaust may flow first through the turbine, then through the underbody converter and then through the three-way catalyst, and during high engine load, exhaust entering the turbine may be cooled in order to reduce thermal load on the turbine.
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公开(公告)号：US20190085794A1
公开(公告)日：2019-03-21
申请号：US16192326
申请日：2018-11-15
发明人： Xiaogang Zhang
IPC分类号： F02M26/19
摘要： Methods and systems are provided for a mixer. In one example, a system may include an EGR mixing having a downstream surface with a plurality of venturi tubes extending therefrom.
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公开(公告)号：US10161362B2
公开(公告)日：2018-12-25
申请号：US15250108
申请日：2016-08-29
发明人： Xiaogang Zhang
IPC分类号： F02M26/19
摘要： Methods and systems are provided for a mixer. In one example, a system may include an EGR mixing having a downstream surface with a plurality of venturi tubes extending therefrom.
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公开(公告)号：US20180347437A1
公开(公告)日：2018-12-06
申请号：US16058114
申请日：2018-08-08
发明人： Xiaogang Zhang
CPC分类号： F01N13/008 , F01N2560/05 , G01M15/102 , G01N15/0606 , G01N15/0656 , G01N2015/0046
摘要： Methods and systems are provided for a particulate matter (PM) sensor assembly positioned downstream of a diesel particulate filter in an exhaust system. In one example, a method may include rotating the PM sensor assembly inside an exhaust passage to generate an output, the rotation based on exhaust flow conditions within the exhaust passage. By rotating the PM sensor assembly via a bearing, a rate of soot particulate accumulation on a sensor element of the assembly may be maintained at a desired level, and independent of a direction of exhaust flow inside the exhaust passage.
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公开(公告)号：US20180313246A1
公开(公告)日：2018-11-01
申请号：US15499327
申请日：2017-04-27
发明人： Xiaogang Zhang
CPC分类号： F01N3/2892 , B01F3/04049 , B01F5/0473 , B01F5/0614 , B01F5/0659 , F01N3/2066 , F01N2240/20 , F01N2470/24 , F01N2610/02
摘要： Methods and systems are provided for an exhaust gas mixer. In one example, a system may comprise an outer annular portion exterior to an exhaust pipe and an inner annular portion interior to the exhaust pipe, where the outer annular portion comprises a spiral fin extending around the exhaust pipe in a downstream direction.
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公开(公告)号：US10100717B2
公开(公告)日：2018-10-16
申请号：US15239672
申请日：2016-08-17
发明人： Xiaogang Zhang
摘要： Methods and systems are provided for generating tumble in intake air by creating an asymmetrical annulus opening for flowing intake air into a combustion chamber of an engine cylinder. The asymmetrical annulus opening may be created by changing an angle of an intake valve disc of an intake valve. The angle of the intake valve disc may be varied based on engine operating parameters by extending or retracting one or more connect rods coupled to an annulus tumble guide movably housed inside an annulus channel.
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