Effect of cold start emissions from gasoline-fueled engines of light-duty vehicles at low and high ambient temperatures: Recent trends

Yusuf, Abdulfatah Abdu; Inambao, Freddie L.

doi:10.1016/j.csite.2019.100417

Cited by 111 publications

(41 citation statements)

References 66 publications

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“…Meanwhile it can only partially reduce emission on cold phase, thus may prolonging the period of high exhaust emission rates, as observed by Yusuf, A.A., Inambao, F.L. (2019) [14]. As countermeasure some technologies were developed to faster warm-up the catalyst, such as SAI (Secondary Air Injection), which injects air in the exhaust to have post-combustion (extra fuel is needed), and EHC (Electrically Heated Catalyst), which utilizes electrical power for heating.…”

Section: Egr (Exhaust Gas Recirculation) Is Used To Reducementioning

confidence: 94%

Soluções para Preservar a Competitividade do Motor PFI Flex Fuel para o Proconve L8.

Neves¹,

Cassiani²,

Weissinger³

et al. 2021

Blucher Engineering Proceedings

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This paper evaluates worldwide available and proven standard emission reduction technologies, from both technical and cost perspectives, for in-cylinder, aftertreatment and evaporative control systems to meet PROCONVE L8, the most stringent light vehicles Brazilian emissions legislation to come, which will enter into force in 2025.Results indicate PFI flex fuel 1.0L engine-based solution as the most cost driven pathway. Nevertheless, according to automaker's strategy, TGDI engines may also be considered as an option.

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Section: Egr (Exhaust Gas Recirculation) Is Used To Reducementioning

confidence: 94%

Soluções para Preservar a Competitividade do Motor PFI Flex Fuel para o Proconve L8.

Neves¹,

Cassiani²,

Weissinger³

et al. 2021

Blucher Engineering Proceedings

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show abstract

“…The exhaust temperature is the main parameter governing the ATS response [18]. Thus, numerous efforts have been conducted for reducing the long warm-up periods [19] looking for faster catalyst light-off. Arnau et al explored engine-based techniques, such as exhaust line thermal insulation [20] and variable valve timing [21] in diesel engines as a way to increase the exhaust temperature during transient operation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Driving Altitude and Ambient Temperature Impact on the Conversion Efficiency of Oxidation Catalysts

et al. 2021

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Worldwide emission standards are extending their requirements to cover engine operation under extreme ambient conditions and fill the gap between the type-approval and real driving conditions. The new ambient boundaries affect the engine performance and raw emissions as well as the efficiency of the exhaust aftertreatment systems. This study evaluates the impact of high altitude and low ambient temperature on the light-off temperature and conversion efficiency of an oxidation catalyst. The results are compared in a common range of exhaust mass flow and temperature with the baseline sea-level operation at 20 °C. A reduction of CO and HC conversion efficiencies was found at 2500 m and −7 °C, with a relevant increase of the light-off temperature for both of the pollutants. The analysis of the experimental data was complemented with the use of a catalyst model to identify the causes leading to the deterioration of the CO and HC light-off. The use of the model allowed for identifying, for the same exhaust mass flow and temperature, the contributions to the variation of conversion efficiency caused by the change in engine-out emissions and tailpipe pressure, which are, in turn, manifested in the variation of the reactants partial pressure and dwell time as governing parameters.

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“…Such limited and unreliable energy access represents an underutilization of the large amount of biomass waste available in the country. For this reason, more attention should be paid to renewable energy, especially biomass energy, which is the case now in many countries [3,4]. A number of different forms of biomass and waste can be used as fuels to be burned, digested, or co-combusted with coal to produce energy [5].…”

Section: Introductionmentioning

confidence: 99%

Comparative study on pyrolysis and combustion behavior of untreated Matooke biomass wastes in East Africa via TGA, SEM, and EDXS

Yusuf

Inambao

Hassan

et al. 2019

Int J Energy Environ Eng

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Biomass has several benefits due to its novel behavior among energy sources. This study aims to characterize a unique form of biomass from two varieties of Matooke peel, namely, untreated Mbwazirume waste peel (UM-WP) and untreated Nakyinyika waste peel (UN-WP). The analysis of the characteristics of these biomasses was carried out using TGA, SEM, and EDXS. TG and DTG analysis showed an almost identical trend between UM-WP and UN-WP. The UM-WP exhibited a high VC 69.988 wt%, MC 13.125 wt%, O 48.02 wt%, and HHV 15.52 MJ-kg −1 with a low ash content 5.957 wt%, sulfur 0.64 wt%, and N 1.13 wt% compared to UN-WP. As compared to pretreated biomass, it was found that the smaller particle sizes had only minor intra-particle gradients and the bigger particle sizes had more of a linear pattern variation. The pyrolysis behavior obtained revealed three distinct regions at elevated temperatures related to the elimination of cellulose, hemicellulose, and lignin. During carbonization, high fluidity and bubbles were produced due to the release of a large amount of volatile matter and forms porous structure which flowed through the fluid mass and produced a non-homogeneous vacuolated structure. These might cause the oxygen to easily disperse inside the particles during combustion. In addition, white spots were observed which are elements from different categories. The findings of this study indicate that UM-WP biomass could be an ideal material source for the production of biofuel and photovoltaic.

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Effect of cold start emissions from gasoline-fueled engines of light-duty vehicles at low and high ambient temperatures: Recent trends

Cited by 111 publications

References 66 publications

Soluções para Preservar a Competitividade do Motor PFI Flex Fuel para o Proconve L8.

Soluções para Preservar a Competitividade do Motor PFI Flex Fuel para o Proconve L8.

Analysis of the Driving Altitude and Ambient Temperature Impact on the Conversion Efficiency of Oxidation Catalysts

Comparative study on pyrolysis and combustion behavior of untreated Matooke biomass wastes in East Africa via TGA, SEM, and EDXS

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