Comparative Evaluation of the Effect of Various Technologies on Light-duty Vehicle CO2 Emissions over NEDC and WLTP

Dimaratos, Athanasios; Tsokolis, Dimitrios; Fontaras, Georgios; Tsiakmakis, Stefanos; Ciuffo, Biagio

doi:10.1016/j.trpro.2016.05.257

Cited by 56 publications

(32 citation statements)

References 4 publications

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“…By doing so, we can eliminate all other test-procedure-related differences and isolate the vehicle speed-profile effects. Of course, for type approval purposes on the chassis-dynamometer, each test schedule is carried out according to the specific test procedure (as outlined in the relevant regulatory documents), and the obtained results should be different from the ones presented here, as the basis for the comparison is not the same (e.g., different gear-shift strategy, vehicle test mass, temperature of the test) [33,34].…”

Section: Application Of the Experimental/simulation Procedures Outlinementioning

confidence: 99%

Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC

Giakoumis

Zachiotis

2017

Energies

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Abstract:The present work presents results from an experimentally validated simulation code, regarding a turbocharged diesel-powered vehicle running on the recently developed worldwide light-duty vehicles WLTC driving cycle. The simulation is based on an engine mapping approach, with correction coefficients applied vis-Ò-vis the transient discrepancies encountered. Both performance and engine-out emission results are presented and discussed. As regards the latter, the concerned pollutants are soot and nitrogen monoxide. Since the WLTC driving cycle is scheduled to replace the NEDC in Europe from September 2017 with regard to the certification of passenger cars and light-duty trucks, a comparative analysis between the two test schedules is also performed for the engine/vehicle under study.

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Section: Application Of the Experimental/simulation Procedures Outlinementioning

confidence: 99%

Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC

Giakoumis

Zachiotis

2017

Energies

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“…The results show that the impact of using the start/stop system on CO and NOx emissions is higher in the NEDC test, mainly due to a longer idling period compared to the WLTP test [88].…”

Section: Comparison Of Resultsmentioning

confidence: 95%

Toxicity of Exhaust Fumes (CO, NOx) of the Compression-Ignition (Diesel) Engine with the Use of Simulation

et al. 2019

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Nowadays more and more emphasis is placed on the protection of the natural environment. Scientists notice that global warming is associated with an increase of carbon dioxide emissions, which results inter alia from the combustion of gasoline, oil, and coal. To reduce the problem of pollution from transport, the EU is introducing increasingly stringent emission standards which should correspond to sustainable conditions of the environment during the operation of motor vehicles. The emissivity value of substances, such as nitrogen oxides (NOx), hydrocarbons (HC), carbon monoxide (CO), as well as solid particles, was determined. The aim of this paper was to examine, by means of simulation in the Scilab program, the exhaust emissions generated by the 1.3 MultiJet Fiat Panda diesel engine, and in particular, carbon monoxide and nitrogen oxides (verified on the basis of laboratory tests). The Fiat Panda passenger car was selected for the test. The fuels supplied to the tested engine were diesel and FAME (fatty acid methyl esters). The Scilab program, which simulated the diesel engine operation, was the tool for analyzing the exhaust toxicity test. The combustion of biodiesel does not necessarily mean a smaller amount of exhaust emissions, as could be concluded on the basis of information contained in the subject literature. The obtained results were compared with the currently valid EURO-6 standard, for which the limit value for CO is 0.5 g/km, and for NOx − 0.08 g/km, and it can be seen that the emission of carbon monoxide did not exceed the standards in any case examined. Unfortunately, when analyzing the total emissions of nitrogen oxides, the situation was completely the opposite and the emissions were exceeded by 20–30%.

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“…However, the fuel consumption effect in both cycles were similar as 1.1-1.4%. Dimaratos et al [14] also showed that limitation of rolling resistance by 10% offers a fuel consumption benefit of 1.2% and 2.2% in NEDC and WLTP, respectively, in diesel vehicle simulation results.…”

Section: Tire Rolling Resistance Effectmentioning

confidence: 95%

“…The increased effect of aerodynamics might be due to increases in the average speed and maximum speed in WLTP when compared with those in NEDC. Dimaratos et al [14] presented that 10% reduction in aerodynamic force decreases fuel consumption by 2% and 2.8% in NEDC and WLTP, respectively. resistance on the cycle energy and fuel consumption are shown in Figures 19 and 20.…”

Section: Coefficeient Of Drag Effectmentioning

confidence: 99%

Comparative Evaluation of the Effect of Vehicle Parameters on Fuel Consumption under NEDC and WLTP

Lee

2020

Energies

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Higher speeds, faster acceleration and longer duration need a more realistic driving cycle. As a result, a new test procedure that reflects real-world driving conditions has been applied since 2017, and the previous development environment optimized for NEDC has also changed. In this study, several factors and technologies relating to fuel consumption, such as vehicle weight, tire rolling resistance, drag of aerodynamic, stop–start, and 48 V mild hybrid system, are evaluated as per the new worldwide harmonized light vehicles test procedure (WLTP) and compared with that of the previous European driving cycle (NEDC). The impact of the vehicle weight is increased in case of the WLTP due to faster acceleration compared to that under NEDC. The influence of aerodynamic force is very important as the average and maximum speed are increased. Meanwhile, the impact of idle stop–start technology is lower compared to that under NEDC due to the reduction in idle operation time. The 48-V mild hybrid system is still expected to play a role as a powerful fuel consumption reduction technology under new WLTP by applying energy regeneration, minor torque assist, and extended idle stop–start.

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Comparative Evaluation of the Effect of Various Technologies on Light-duty Vehicle CO2 Emissions over NEDC and WLTP

Cited by 56 publications

References 4 publications

Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC

Investigation of a Diesel-Engined Vehicle’s Performance and Emissions during the WLTC Driving Cycle—Comparison with the NEDC

Toxicity of Exhaust Fumes (CO, NOx) of the Compression-Ignition (Diesel) Engine with the Use of Simulation

Comparative Evaluation of the Effect of Vehicle Parameters on Fuel Consumption under NEDC and WLTP

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