Investigation of Emissions Impacts from Hybrid Powertrains [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 621.43 Internal-combustion engines

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2020

Mô tả vật lý: Size: 71 p. : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 266238

The National Renewable Energy Laboratory (NREL) under California Air Resources Board (CARB) Agreement Number 14-613, NREL Contract Number FIA-15-1802, has performed a series of chassis dynamometer and portable emissions measurement system (PEMS) studies to better understand how tailpipe NOx emissions are affected by the addition of a hybrid propulsion system as compared with conventional medium-duty and heavy-duty diesel vehicles operating in the same vocations. Previous work has demonstrated the addition of an aftermarket hybrid propulsion system can provide a significant fuel economy advantage under the right drive cycle conditions. However, many vehicles also exhibited an increase in tailpipe NOx emissions. This work, under CARB Agreement Number 11-600, NREL Contract Number FIA-11-1763 demonstrated an increase in tailpipe NOx across a number of vocations and vehicle body styles. The emissions increase was also observed using various test methods including chassis dynamometer, PEMS, and in-use on-board diagnostics (OBD) NOx sensors (Thornton et al. 2014). The work presented in this report represents a continued effort to better understand the cause of this emissions increase and steps that can be taken to ensure the issue is addressed for future vehicles going forward.
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