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An Experimental Study on Soot Particles Size Distribution and Nanostructure Evolution at Different Tailpipe Positions of a Dedicated Hybrid Engine Tongji University School of Automotive Studies
- Format:
- Book
- Conference/Event
- Author/Creator:
- Fu, Jiale, author.
- Conference Name:
- SAE 2023 Vehicle Powertrain Diversification Technology Forum (2023-08-26 : Shanghai, China)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2023
- Summary:
- Hybrid vehicles, compared to pure fossil fuel vehicles, have added power battery pack, high-power electric motors. The space of the aftertreatment is limited, so the layout position of the aftertreatment system must be optimized. Meanwhile, the European 7 emission standard reduces the particulate number (PN) limit particles size from 23nm to 10nm, presenting new challenges for the aftertreatment system. The focus of this study is to investigate the variations in particles size distribution and nanostructure of soot particles during the exhaust along a dedicated hybrid engine aftertreatment system (catalyst carrier free). Four operating conditions were selected for the test, namely 2000 r/min-0.2 MPa, 2000 r/min-0.8 MPa, 4500 r/min-0.2 MPa, and 4500 r/min-0.8 MPa. The particles sampling points are before Three-way catalyst (TWC), after TWC, and after gasoline particulate filter (GPF). Engine Exhaust Particle Sizer (EEPS) was used to analyze the changes in particle modal distribution, transmission electron microscope (TEM) was used to analyze the nanostructure of particles, and Raman spectroscopy was used to analyze the degree of nanostructure order. The results show that with the exhaust transport, the total PN decreased by an average of about 64.4% under each operating condition. Taking the 4500 r/min-0.8 MPa as an example, the proportion of nucleation mode particles decreased from sampling points 1 to 3, the proportion of accumulation mode increased, the average diameter of primary particle increased by 20.3%, the fringe separation distance increased by 2.3%, the fringe tortuosity increased by 2.6%, the fringe length decreased by 2.6%, the fractal dimension increased by 11.2%, the degree of disorder of particles increased
- Notes:
- Vendor supplied data
- Publisher Number:
- 2023-01-7003
- Access Restriction:
- Restricted for use by site license
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