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Comparison of fuel efficiency and exhaust emissions between the aged and new DPF systems of Euro 5 diesel passenger car

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Abstract

This study was conducted to examine the impact of aged and new DPF systems of the Euro 5 diesel passenger car on fuel efficiency and exhaust emissions. Test diesel vehicle used in this study was equipped with diesel oxidation catalyst (DOC) and diesel particulate filter (DPF) as aftertreatment systems, and satisfied the Euro-5 emissions standard. The displacement volume of engine was 1.6 L and the cumulative mileage was 167,068 km before the test. The FTP-75 test procedure was used, and the time resolved and weight based exhaust emissions of total hydrocarbon (THC), carbon monoxide (CO) and nitrogen oxides (NOx) were measured. The results show that the vehicle with the new DPF system has lower emissions of THC, CO and NOx than the aged one, and fuel efficiency also increased about 5 percent. The aged DPF system had higher backpressure due to the particulate matter (mostly in the form of ash) accumulated in the DPF. As was shown in the analysis using X-CT (X-ray computer tomography), the aged DPF system had particulate matter (PM) accumulated to a length of 46.6 mm. In addition, a component analysis of PM through XRF (X-ray fluorescence) analysis found that 50 % or more of the components consisted of the P, S, Ca, and Zn.

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Abbreviations

CO:

carbon monoxide

CRDI:

common rail direct injection

CVS:

constant volume sampling

DOC:

diesel oxidation catalyst

DPF:

diesel particulate filter

FTP-75:

federal test procedure

NOx :

nitrogen oxides

OBD:

on-board diagnostics

PM:

particulate matter

PN:

particle number

THC:

total hydrocarbon

X-CT:

X-ray computer tomography

XRF:

X-ray fluorescence

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Authors and Affiliations

  1. Energy Efficiency Research Division, KIER, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Korea

    Jinyoung Jang & Ohseok Kwon

  2. Center for Environmentally Friendly Vehicle, KIER, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Korea

    Youngjae Lee

Authors
  1. Jinyoung Jang
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  2. Youngjae Lee
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  3. Ohseok Kwon
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Correspondence to Youngjae Lee.

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Jang, J., Lee, Y. & Kwon, O. Comparison of fuel efficiency and exhaust emissions between the aged and new DPF systems of Euro 5 diesel passenger car. Int.J Automot. Technol. 18, 751–758 (2017). https://doi.org/10.1007/s12239-017-0074-9

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  • DOI: https://doi.org/10.1007/s12239-017-0074-9

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