Exhaust Emissions from Euro 6 Vehicles in WLTC and RDE—Part 2: Verification by Experimental Measurement

Pielecha, Jacek; Kurtyka, Karolina

doi:10.3390/en16227533

Cited by 3 publications

References 32 publications

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Predictive methods for CO 2 emissions and energy use in vehicles at intersections

Mądziel

2024

Preprint

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This study examines CO₂ emissions and vehicle energy consumption at high-traffic intersections in urban areas. Existing emission models at the macro, meso, and microscales often fail to accurately represent real traffic conditions, especially at intersections with frequent stop-and-go maneuvers. New predictive models were developed using methods such as linear regression, least absolute shrinkage and selection operator (LASSO), Ridge regression, Random Forest, and Extreme Gradient Boosting (XGBoost), with XGBoost providing the highest accuracy. The density-based spatial clustering of applications with noise (DBSCAN) algorithm was used to group data specific to intersection areas, enabling targeted analysis. Real-world driving data were collected using portable emissions measurement systems and the Hioki 3390 power analyzer. The developed models were validated and applied in simulations, including Vissim software, to improve road infrastructure planning and traffic management. These methods offer a refined approach to reducing emissions and optimizing energy use in urban transportation networks.

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Predictive methods for CO 2 emissions and energy use in vehicles at intersections

Mądziel

2024

Preprint

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Testing Exhaust Emissions of Plug-In Hybrid Vehicles in Poland

Pielecha,

Gis

2024

Energies

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The article addresses the usage patterns of plug-in hybrid vehicles (PHEVs) under Polish conditions. The conventional approach to operating such vehicles assumes that they are used with a fully charged battery at the start. However, the economic circumstances of Polish users often do not allow for daily charging of vehicles from the domestic power grid. As a result, these vehicles are used not only in a mode powered solely by the internal combustion engine but also in a mode where the internal combustion engine is primarily utilized to charge the battery. An analysis was conducted on various ways of operating plug-in vehicles, evaluating not only harmful emissions but also fuel consumption (for battery states of charge: SOC = 100%, SOC = 50%, SOC = 0%, and SOC = 0 → 100%—forced charging mode). The study focused on the most characteristic vehicle segment in Poland, SUVs, and employed a methodology for determining exhaust emissions under real-world driving conditions. Results indicate that forced charging of such a vehicle’s battery leads to over a 25-fold increase in carbon dioxide emissions (fuel consumption) in urban areas compared to operating the vehicle with a fully charged battery (CO—25× increase, NOx—12× increase, PN—11× increase). Operating a plug-in SUV without charging it from the power grid results in a 13-fold increase in fuel consumption compared to using the vehicle with a fully charged battery (CO—10× increase, NOx—6× increase, PN—4× increase). The emission results were used to evaluate Poland’s charging infrastructure in the context of PHEV usage. The current state of the infrastructure and its development plans for 2030 and 2040 were analyzed. It was found that significant reductions in fuel consumption (by approximately 30%) and CO2 emissions are achievable by 2040. Emissions of CO, NOx, and PN are expected to decrease by about 10%, primarily due to the internal combustion engine operating at high load conditions in non-urban or highway scenarios.

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A New Design Rule of Engine Coolant Pump in ICEs Focused to Energy Consumption Reduction

DI BARTOLOMEO,

Di Battista,

Cipollone

et al. 2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Engine thermal management systems represent a promising solution to improve the efficiency of current Internal Combustion Engines (ICE) and sustain the transition towards a net zero scenario. The core component of an engine thermal management system is the electric pump, which can adjust the coolant flow rate according to the engine thermal needs. This possibility opens to newer design choices, which can contribute to non-negligible energy savings. In this study, three electric coolant pumps with different maximum efficiencies have been investigated to understand the influence of the design operating conditions on the pump energy absorption. A reference vehicle equipping a 130 HP downsized gasoline engine has been considered. An experimental test bench with a copy of the engine and its cooling circuit has been reproduced, and the electric pumps have been tested at a wide range of rotational speeds and thermostat lifts to obtain their characteristic maps. Once their performances were known, the vehicle was run in three driving cycles consisting of different shares of rural, urban and highway sections, acquiring data from the Electronic Control Unit (ECU). These data have been used to calculate the operating condition and energy absorption of the mechanical pump originally equipped by the vehicle and the electric pumps. The results have been evaluated using a statistical approach, normalizing the instantaneous efficiency by using their maximum efficiency values. The results show that all the electric pumps have lower energy absorption compared to the conventional mechanical actuation, with a reduction of up to 77% of the energy absorption. Considering the vehicle's fuel consumption and the lower heating value of gasoline, the potential reduction of CO<sub>2</sub> specific emissions is 1 g/km. The statistical analysis approach showed that the design operating conditions have a higher influence than the maximum pump efficiency. The best performances are achieved through the electric pump with the lowest efficiency, showing a decrease in energy absorption between 10 % and 50% compared to the other electric prototypes, depending on the driving profile.</div></div>

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Exhaust Emissions from Euro 6 Vehicles in WLTC and RDE—Part 2: Verification by Experimental Measurement

Cited by 3 publications

References 32 publications

Predictive methods for CO 2 emissions and energy use in vehicles at intersections

Predictive methods for CO 2 emissions and energy use in vehicles at intersections

Testing Exhaust Emissions of Plug-In Hybrid Vehicles in Poland

A New Design Rule of Engine Coolant Pump in ICEs Focused to Energy Consumption Reduction

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