Testing and evaluation of cold-start emissions from a gasoline engine in RDE test at two different ambient temperatures

Pielecha, Jacek; Skobiej, Kinga; Kurtyka, Karolina

doi:10.1515/eng-2021-0047

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…Higher percentages were measured at lower ambient temperatures. For the actual on-road tests, the contribution was 6-19% for CO and NO x , which is in agreement with other studies [56,60].…”

Section: Cold Startsupporting

confidence: 92%

“…For NO x , the contribution was lower in most RDE short tests. Other studies have also found a high contribution from cold start for CO (>70%), but this is smaller for NO x (40-60%) for turbo-charged GDI vehicles [53][54][55]; however, lower percentages have also been reported for RDE trips [32,56]. The cold start contribution was around 50% for NH 3 .…”

Section: Cold Startmentioning

confidence: 89%

“…On the other hand, no clear effect of ambient temperature on NO x for gasoline cars is reported in the literature [17,35,56,69,72]. However, some studies report a relatively small increase [10,30,34]: At −7 • C, NO x emissions were, on average, 1.7 times higher than at 23 • C [30].…”

Section: Ambient Temperaturementioning

confidence: 96%

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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: Cold Startsupporting

confidence: 92%

Section: Cold Startmentioning

confidence: 89%

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

et al. 2021

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“…Since cold start and ambient temperature are closely related and have a large influence on each other, we also included cold start emissions in the study. The contribution of cold start for petrol vehicles was also investigated in the work by Pielecha et al ( 2021 ). The authors found that at 8 °C (the lowest temperature studied), the proportion of cold start emissions was highest as a function of total driving emissions.…”

Section: Methodsmentioning

confidence: 99%

The impact of ambient temperature and powertrains of SUVs on the environment in Slovakia during the use phase

Sečkár,

Schwarz

2024

Environ Monit Assess

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This study compares different powertrains of sport utility vehicles (SUVs) with respect to ambient temperature and energy mix in Slovakia using the well-to-wheel (WTW) Life Cycle Assessment (LCA) method. Battery electric vehicles (BEV), plug-in hybrid electric vehicles (PHEV), and petrol and diesel vehicles were assessed and compared. The WTW study was conducted in SimaPro software assessing electricity/petrol/diesel production, transport, and use (energy conversion in the vehicle), with impact categories being climate change, particulates, NOx emissions, ionizing radiation, and fossil resource scarcity depending on the season (summer and winter). The results indicate that for Slovak conditions, BEV generally had the lowest environmental impact in both seasons studied. The only exceptions were ionizing radiation, which is clearly caused by the high share of nuclear power in the Slovak energy mix, and NOx emissions, which are caused by the combustion of biomass for electricity generation. The other impact categories were dominated by vehicles with an internal combustion engine. The results of emissions from fuel production are also given for each impact category. The transportation of fuel did not exceed the value of 1% for any impact category or for any powertrain. The conclusions of the study support the global trend in favour of vehicle electrification as an important way to reduce the negative environmental impacts of internal combustion engine vehicles in Slovakia.

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“…Normally, catalytic converter has low efficiency of CO conversion in low temperature and the efficiency will be increased along with the increasing of temperature [19]. According to research, a gasoline car emits may emits CO with the concentration of 1 % in the first minute of idling and it gradually reduces the CO concentration as the increase of engine and catalytic converter temperature [20].…”

Section: Introductionmentioning

confidence: 99%

The Effects of the Exhaust Fan Position to Indoor Air Pollution Distribution in Enclosed Parking Garage

Pramadhony

Sahim²,

Puspitasari³

et al. 2023

CFDL

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Nowadays, lack of space in city center has forced the architects a propose a vertical construction to provide public facility, including the parking garage. Generally, this vertical parking garage has enclosed environment condition, which could be constructed under the building or in the middle of other buildings. This environment causes the parking garage will not have an adequate fresh air circulation or air change rate and gives a more risk due to the accumulation of air pollutants which is emitted from the cars inside. In this research, it observes a simple enclosed parking garage which normally can accommodate six cars. The air pollutant, particularly Carbon Monoxide (CO), from three gasoline cars is extracted by an exhaust fan in a proper location. Two location of exhaust fan are proposed to investigate better air circulation and better air pollutant extraction from the parking garage. The first option (Position of A) installs the exhaust fan near to the parking space units and the other installs the exhaust fan near to the pathway. Each option will follow two worst condition of simulations which are predicted will give a significant impact to Indoor Air Quality (IAQ). Each simulation has to extract the emission from three idle cars with same rate of air circulation of six air change per hour. The results show the influence of air flow pattern to the dispersion of air pollutant. An adequate air flow near to the emission source will cause the increase the maximum of air pollutant concentration. On the other hand, it can minimize the spread of air pollutant dispersion.

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Testing and evaluation of cold-start emissions from a gasoline engine in RDE test at two different ambient temperatures

Cited by 12 publications

References 17 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

The impact of ambient temperature and powertrains of SUVs on the environment in Slovakia during the use phase

The Effects of the Exhaust Fan Position to Indoor Air Pollution Distribution in Enclosed Parking Garage

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