Application of a methodology to assess the performance of a full-scale diesel oxidation catalyst during cold and hot start NEDC drive cycles

Robinson, Kevin; Ye, Shifei; Yap, Yeow Hong; Kolaczkowski, S.T.

doi:10.1016/j.cherd.2013.02.022

Cited by 28 publications

(16 citation statements)

References 13 publications

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“…This light‐off time is prolonged by the thermal capacity of the exhaust pipes and catalytic converter. Interestingly, also in warm start conditions a large proportion of engine operating points are in the inefficient catalyst region, which is consistent with Robinson's results …”

Section: Exhaust Temperature and Emissions Of The Baseline Configurationsupporting

confidence: 91%

“…In Maus' results, the SCR took more than 1000 seconds to reach its light‐off temperature after cold start. The catalyst can operate inefficiently even during portions of the NEDC from warm start . The same study reports that cold conditions occurred more frequently during real road driving than in preprogrammed bench tests.…”

Section: Introductionmentioning

confidence: 78%

“…In addition, the exhaust temperature is low and insufficient for catalyst light off, which prevents a large amount of exhaust emissions from being treated. The diesel catalyst light‐off temperature is approximately 200°C; however, in reference the DOC inlet temperature was below 130°C for the majority of the first 400 seconds of the new European driving cycle (NEDC) from cold start. In Maus' results, the SCR took more than 1000 seconds to reach its light‐off temperature after cold start.…”

Section: Introductionmentioning

confidence: 99%

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On the emission reduction through the application of an electrically heated catalyst to a diesel vehicle

Gao

Tian

Sorniotti

2019

Energy Science & Engineering

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Exhaust emissions from diesel engine powered vehicles are considerably high during cold start and warm‐up, because of the poor catalyst performance due to the insufficient catalyst temperature. The controlled heat injection allowed by electrically heated catalysts can effectively reduce the catalyst light‐off time with relatively moderate fuel penalty. This paper compares the exhaust temperature and emissions of a case study diesel vehicle in cold and warm start conditions, and proposes two electrically heated catalyst control strategies, which are evaluated in terms of emission reduction and energy consumption with different target temperature settings. In addition, a new performance indicator, that is, the specific emission reduction, is used to evaluate the after‐treatment system and associated thermal management. For the worldwide harmonized light vehicle test cycle, the results without electrically heated catalyst show that from both cold and warm start conditions a large amount of operating points of the engine is located in the region of partial catalyst light off. Moreover, emissions, especially in terms of carbon monoxide and hydrocarbon, significantly decrease with the electrically heated catalyst implementation, for example, by at least 50% from cold start; however, they still tend to be rather substantial when the fuel is re‐injected after the engine cutoff phases. The exhaust temperature is lower than the target values in the sections of the driving cycle in which the electrically heated catalyst power is saturated according to the maximum level allowed by the device. The carbon dioxide penalty brought by the electrically heated catalyst ranges from 3.93% to 6.65% and from 6.49% to 9.35% for warm and cold start conditions, respectively.

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Section: Exhaust Temperature and Emissions Of The Baseline Configurationsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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On the emission reduction through the application of an electrically heated catalyst to a diesel vehicle

Gao

Tian

Sorniotti

2019

Energy Science & Engineering

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“…25 The existence of a delay in pollutant analysis is due to two different sources. 26 On one hand, there is an internal delay necessary to analyse the sample that depends on the type of pollutant. On the other hand, the distance between the sample point and the gas analyser forces the existence of a delay defined by the gas velocity and the length of the sample pipes.…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

Influence of ambient temperature on diesel engine raw pollutants and fuel consumption in different driving cycles

Luján

Climent

Ruíz

2018

International Journal of Engine Research

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The effect of low ambient temperature on diesel raw pollutant emissions is analysed in two different driving cycles: NEDC and WLTC. The study is focused on hydrocarbons, carbon monoxide, nitrogen oxides and fuel consumption. Tests are conducted at cold start in a HSDI light-duty diesel engine with two levels of ambient temperature: 20 °C and −7 °C. Results showed a general detriment of pollutant emissions and break thermal efficiency at low ambient temperatures. NOx is increased around 250% in both cycles when running at low temperatures. Effect on hydrocarbons is more noticeable in the NEDC, where it rises in 270%, compared with the 150% of increase in the WLTC. In the case of carbon monoxide, uncorrelated tendencies are observed between both driving cycles. Concerning the NEDC, carbon monoxide emissions increase up to 125%, while at the WLTC, they are reduced up to 20%. Finally, from the point of view of the thermal efficiency, a reduction of nearly 10% in the NEDC is observed. However, no fuel penalty is spotted regarding the WLTC.

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“…Two way catalytic convertor used in the exhaust treatment system of diesel engines reduces hydrocarbon and carbon monoxide emissions, with the aid of heat and oxidation catalyst [3,4]. NOx emissions in diesel engines are reduced by employing exhaust gas recirculation [5,6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of stable cerium zirconium oxide nanoparticle – Diesel suspension and investigation of its effects on diesel properties and smoke

Sajeevan

Sajith

2016

Fuel

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Application of a methodology to assess the performance of a full-scale diesel oxidation catalyst during cold and hot start NEDC drive cycles

Cited by 28 publications

References 13 publications

On the emission reduction through the application of an electrically heated catalyst to a diesel vehicle

On the emission reduction through the application of an electrically heated catalyst to a diesel vehicle

Influence of ambient temperature on diesel engine raw pollutants and fuel consumption in different driving cycles

Synthesis of stable cerium zirconium oxide nanoparticle – Diesel suspension and investigation of its effects on diesel properties and smoke

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