Fast Spatially Resolved Exhaust Gas Recirculation (EGR) Distribution Measurements in an Internal Combustion Engine Using Absorption Spectroscopy [electronic resource]

• 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, 2015
• Mô tả vật lý: Size: 1047-1058 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 265953
• Chủ đề: 1. 32 energy conservation, consumption, and utilization; 2. 33 advanced propulsion systems; 3. Egr probe; 4. Engine; 5. Exhaust-gas recirculation

Tóm tắt

 One effective method of reducing NO<
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 emissions while improving efficiency is exhaust gas recirculation (EGR) in internal combustion engines. But, insufficient mixing between fresh air and exhaust gas can lead to cycle-to-cycle and cylinder-to-cylinder nonuniform charge gas mixtures of a multi-cylinder engine, which can in turn reduce engine performance and efficiency. Furthermore, a sensor packaged into a compact probe was designed, built and applied to measure spatiotemporal EGR distributions in the intake manifold of an operating engine. The probe promotes the development of more efficient and higher-performance engines by resolving high-speed in situ CO<
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  concentration at various locations in the intake manifold. Our study employed mid-infrared light sources tuned to an absorption band of CO<
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  near 4.3 ?m, an industry standard species for determining EGR fraction. The calibrated probe was used to map spatial EGR distributions in an intake manifold with high accuracy and monitor cycle-resolved cylinder-specific EGR fluctuations at a rate of up to 1 kHz.