Real-world gaseous emission characteristics of Euro 6b light-duty gasoline- and diesel-fueled vehicles

Yang, Zhiwen; Liu, Yao; Wu, Lin; Martinet, Simon; Zhang, Yi; André, M.; Mao, Hongjun

doi:10.1016/j.trd.2019.102215

Cited by 66 publications

(22 citation statements)

References 26 publications

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“…Furthermore, it could be that the 50 • C condition had not been optimized and/or calibrated. Nevertheless, for this vehicle, there were no high CO and NO x emissions on the motorway, as has been reported in some other gasoline vehicles [22,23,82]; in our tests, emissions were always below the (non-applicable) limits. The high emissions in previous studies could be also due to the small catalyst volume (i.e., high space velocity at high speeds) [83] and a rich engine operation (both result in lower conversion efficiency).…”

Section: Motorway Emissionssupporting

confidence: 82%

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

et al. 2021

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Gaseous emissions of modern Euro 6d vehicles, when tested within real driving emissions (RDE) boundaries, are, in most cases, at low levels. There are concerns, though, about their emission performance when tested at or above the boundaries of ambient and driving conditions requirements of RDE regulations. In this study, a Euro 6d-Temp gasoline direct injection (GDI) vehicle with three-way catalyst and gasoline particulate filter was tested on the road and in a laboratory at temperatures ranging between −30 °C and 50 °C, with cycles simulating urban congested traffic, uphill driving while towing a trailer at 85% of the vehicle’s maximum payload, and dynamic driving. The vehicle respected the Euro 6 emission limits, even though they were not applicable to the specific cycles, which were outside of the RDE environmental and trip boundary conditions. Most of the emissions were produced during cold starts and at low ambient temperatures. Heavy traffic, dynamic driving, and high payload were found to increase emissions depending on the pollutant. Even though this car was one of the lowest emitting cars found in the literature, the proposed future Euro 7 limits will require a further decrease in cold start emissions in order to ensure low emission levels under most ambient and driving conditions, particularly in urban environments. Nevertheless, motorway emissions will also have to be controlled well.

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Section: Motorway Emissionssupporting

confidence: 82%

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

et al. 2021

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“…In this sense, the fuel consumption reduction, altitude variations, real driving emissions and cold operating conditions are considered guidelines in the current and future legislations. 1 Furthermore, the consequent reduction in the pollutant emissions levels is a second challenge to achieve for the automotive industry. Apart from the imperative reduction of the carbon dioxide (CO 2 ) and carbon monoxide (CO) emissions, the nitrogen oxides (NO x ) emissions reduction in diesel engines will be a major concern in future regulatory stages.…”

Section: Introductionmentioning

confidence: 99%

Impacts of the exhaust gas recirculation (EGR) combined with the regeneration mode in a compression ignition diesel engine operating at cold conditions

Galindo

Dolz

Monsalve‐Serrano

et al. 2021

International Journal of Engine Research

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Internal combustion engines working at cold conditions lead to the production of excessive pollutant emissions levels. The use of the exhaust gas recirculation could be necessary to reduce the nitrogen oxides emissions, even at these conditions. This paper evaluates the impact of using the high-pressure exhaust gas recirculation strategy while the diesel particulate filter is under active regeneration mode on a Euro 6 turbocharged diesel engine running at low ambient temperature (−7°C). This strategy is evaluated under 40 h of operation, 20 of them using the two systems in combination. The results show that the activation of the high-pressure exhaust gas recirculation during the particulate filter regeneration process leads to a 50% nitrogen oxides emissions reduction with respect to a reference case without exhaust gas recirculation. Moreover, the modification of some engine parameters compared to the base calibration, as the exhaust gas recirculation rate, the main fuel injection timing and the post injection quantity, allows to optimize this strategy by reducing the carbon monoxide emissions up to 60%. Regarding the hydrocarbons emissions and fuel consumption, a small advantage could be observed using this strategy. However, the activation of the high-pressure exhaust gas recirculation at low temperatures can produce fouling deposits and condensation on the engine components (valve, cooler, intake manifold, etc.) and can contribute to reach saturation conditions on the particulate filter. For these reasons, the regeneration efficiency is followed during the experiments through the filter status, concluding that the use of low high-pressure exhaust gas recirculation rates in combination with the regeneration mode also allows to clean the soot particles of the particulate filter. These soot depositions are visualized and presented at the end of this work with a brief analysis of the soot characteristics and a quantitative estimation of the total soot volume produced during the experimental campaign.

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“…12 Previous studies addressed the importance of reducing real-world CO 2 and NO x emissions. Yang et al 13 also demonstrated that NO x and CO 2 emissions were critical to address RDE of Euro 6 passenger cars.…”

Section: Introductionmentioning

confidence: 99%

Impacts of De‐NO_x system layouts of a diesel passenger car on exhaust emission factors and monetary penalty

Gao

Chen

Liu

et al. 2021

Energy Science & Engineering

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Real-world gaseous emission characteristics of Euro 6b light-duty gasoline- and diesel-fueled vehicles

Cited by 66 publications

References 26 publications

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

Impacts of the exhaust gas recirculation (EGR) combined with the regeneration mode in a compression ignition diesel engine operating at cold conditions

Impacts of De‐NO_x system layouts of a diesel passenger car on exhaust emission factors and monetary penalty

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Real-world gaseous emission characteristics of Euro 6b light-duty gasoline- and diesel-fueled vehicles

Cited by 66 publications

References 26 publications

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

Effect of Extreme Temperatures and Driving Conditions on Gaseous Pollutants of a Euro 6d-Temp Gasoline Vehicle

Impacts of the exhaust gas recirculation (EGR) combined with the regeneration mode in a compression ignition diesel engine operating at cold conditions

Impacts of De‐NOx system layouts of a diesel passenger car on exhaust emission factors and monetary penalty

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Impacts of De‐NO_x system layouts of a diesel passenger car on exhaust emission factors and monetary penalty