Author
Pablo Mendoza-Villafuerte
Bio: Pablo Mendoza-Villafuerte is an academic researcher. The author has contributed to research in topics: Diesel fuel & Portable emissions measurement system. The author has an hindex of 4, co-authored 4 publications receiving 188 citations.
Papers
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TL;DR: A comprehensive study on the real-time on-road emissions of NOx, NH3, N2O and PN from a Euro VI HDV equipped with a Diesel Oxidation Catalyst (DOC), a Diesel Particle Filter (DPF), a Selective Catalytic Reduction (SCR) system and an Ammonia Oxidation catalyst (AMOX) is presented.
110 citations
TL;DR: In this article, a portable FTIR was used to measure NH3 emissions from gasoline and SCR-equipped diesel light-duty vehicles during real driving on-road operation using the World Harmonized Light-duty Test Cycle (WLTC).
83 citations
TL;DR: This study discusses the current status of determining SPN emission factors both on the chassis dynamometer and on-road using PEMS-SPN and finds that cold-start and strong accelerations tend to substantially increase SPN emissions.
Abstract: Emission inventories are used to quantify sources and identify trends in the emissions of air pollutants. They use vehicle-specific emission factors that are typically determined in the laboratory, through remote-sensing, vehicle chasing experiments and, more recently, on-board Portable Emission Measurement Systems (PEMS). Although PEMS is widely applied to measure gaseous pollutants, their application to Solid Particle Number (SPN) emissions is new. In this paper, we discuss the current status of determining SPN emission factors both on the chassis dynamometer and on-road using PEMS-SPN. First, we determine the influence of the measurement equipment, ambient temperature, driving style and cycle characteristics, and the extra mass of the PEMS equipment on the SPN emissions. Afterward, we present the SPN emissions under type-approval conditions as well as on the road of two heavy-duty diesel vehicles equipped with Diesel Particulate Filter (DPF) (one Euro VI), two light-duty diesel vehicles equipped with DPF, one light-duty vehicle equipped with a Port Fuel Injection engine (PFI), and seven Gasoline Direct Injection (GDI) passenger cars (two Euro 6). We find that cold-start and strong accelerations tend to substantially increase SPN emissions. The two heavy-duty vehicles showed emissions around 2×10^13 p/km (Euro V truck) and 6×10^10 p/km (Euro VI truck), respectively. One of the DPF-equipped light-duty vehicles showed emissions of 8×10^11 p/km, while the other one had one order of magnitude lower emissions. The PFI car had SPN emissions slightly higher than 1×10^12 p/km. The emissions of GDI cars spanned approximately from 8×10^11 p/km to 8×10^12 p/km. For the cars without DPF, the SPN emissions remained within a factor of two of the laboratory results. This factor was on average around 0.8 for the Euro 6 and 1.6 for the Euro 5 GDIs. The DPF equipped vehicles showed a difference of almost one order of magnitude between laboratory and on-road tests due to the different DPF fill state and passive regeneration during the tests. The findings of this study can (i) help improving the on SPN emissions and (ii) assist policy makers in designing effective test procedures for measuring SPN emissions of vehicles under real-world driving conditions.
47 citations
TL;DR: In this article, NH 3 and N 2 O emissions from a Euro V truck equipped with a selective catalytic reduction system (SCR) were measured in real time using a QCL-IR.
36 citations
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TL;DR: In this article, the authors present real-world diesel Euro VI HDVs emissions of both gaseous pollutants and solid PN and compare the performance of aftertreatment systems under different speed conditions.
147 citations
TL;DR: This paper presents a comprehensive analysis of solar PV-EV charging systems and deployment in the world and the methodology presented here was time- and cost-effective, and very helpful to the researchers and students in this field.
Abstract: Electric vehicles (EVs) are becoming increasingly popular in many countries of the world. EVs are proving more energy efficient and environmental friendly than ICEVs. But the lack of charging stati...
144 citations
TL;DR: The findings show that while achieving the fuel reduction target, hybridisation did not bring the expected benefits to urban air quality, and HEVs showed no reduction in HC emissions and consistently higher CO emissions compared to the conventional ICE vehicles.
131 citations
TL;DR: A comprehensive study on the real-time on-road emissions of NOx, NH3, N2O and PN from a Euro VI HDV equipped with a Diesel Oxidation Catalyst (DOC), a Diesel Particle Filter (DPF), a Selective Catalytic Reduction (SCR) system and an Ammonia Oxidation catalyst (AMOX) is presented.
110 citations
TL;DR: The results showed that the China IV and China V HDDVs with appropriate SCR functionality could reduce NOX emissions by 36% and 53%, respectively, compared to the China III results, although their real-world emissions were still higher than the corresponding emission limits for regulatory engine tests.
87 citations