A research on the real world emission characteristics of state-V buses

Jiadong Guo; Yunshan Ge; Jianwei Tan; Xuemin Zhang; Linxiao Yu; Mingliang Fu

A research on the real world emission characteristics of state-V buses

Jiadong Guo, Yunshan Ge, Jianwei Tan, Xuemin Zhang, Linxiao Yu, Mingliang Fu

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The real world emissions from 14 State-V buses with four different after-treatment technologies are measured with portable emission measurement system. The results show that diesel oxidation catalyst can apparently reduce the CO emission of CNG-fueled buses, but its effect of reducing THC emission need to be improved. The CNG-fueled buses adopting EGR technology have a better emission reduction effects than diesel buses at low speed but there is no superiority at high speeds. The diesel buses with SCR system have lower CO and THC emissions but their NO_x emissions are relatively high at low speeds, while the CNG-fueled buses with SCR system can effectively reduce NO_x emission due to higher exhaust temperature, being the most ideal choice. The particulate matter mass emissions of CNG-fueled buses are far lower than diesel buses, but due to the effects of the way of dilution they emit more particles in nucleation mode.

Original language	English
Pages (from-to)	120-124
Number of pages	5
Journal	Qiche Gongcheng/Automotive Engineering
Volume	37
Issue number	1
Publication status	Published - 25 Jan 2015

Keywords

After-treatment systems
Buses
CNG
Diesel engine
Real-world emissions

Cite this

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abstract = "The real world emissions from 14 State-V buses with four different after-treatment technologies are measured with portable emission measurement system. The results show that diesel oxidation catalyst can apparently reduce the CO emission of CNG-fueled buses, but its effect of reducing THC emission need to be improved. The CNG-fueled buses adopting EGR technology have a better emission reduction effects than diesel buses at low speed but there is no superiority at high speeds. The diesel buses with SCR system have lower CO and THC emissions but their NOx emissions are relatively high at low speeds, while the CNG-fueled buses with SCR system can effectively reduce NOx emission due to higher exhaust temperature, being the most ideal choice. The particulate matter mass emissions of CNG-fueled buses are far lower than diesel buses, but due to the effects of the way of dilution they emit more particles in nucleation mode.",

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AU - Guo, Jiadong

AU - Ge, Yunshan

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AU - Zhang, Xuemin

AU - Yu, Linxiao

AU - Fu, Mingliang

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AB - The real world emissions from 14 State-V buses with four different after-treatment technologies are measured with portable emission measurement system. The results show that diesel oxidation catalyst can apparently reduce the CO emission of CNG-fueled buses, but its effect of reducing THC emission need to be improved. The CNG-fueled buses adopting EGR technology have a better emission reduction effects than diesel buses at low speed but there is no superiority at high speeds. The diesel buses with SCR system have lower CO and THC emissions but their NOx emissions are relatively high at low speeds, while the CNG-fueled buses with SCR system can effectively reduce NOx emission due to higher exhaust temperature, being the most ideal choice. The particulate matter mass emissions of CNG-fueled buses are far lower than diesel buses, but due to the effects of the way of dilution they emit more particles in nucleation mode.

KW - After-treatment systems

KW - Buses

KW - CNG

KW - Diesel engine

KW - Real-world emissions

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A research on the real world emission characteristics of state-V buses

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Keywords

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