Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

Language: English

You searched for subject:(AVL CRUISE). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Texas – Austin

1. Ates, Murat, 1982-. Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study.

Degree: MSin Engineering, Mechanical Engineering, 2009, University of Texas – Austin

Development of a fuel economy model for light-duty and heavy-duty vehicles is part of the Texas Department of Transportation’s “Estimating Texas Motor Vehicle Operating Costs” project. A literature review for models that could be used to predict the fuel economy of light-duty and heavy-duty vehicles resulted in selection of coastdown coefficients to simulate the combined effects of aerodynamic drag and tire rolling resistance. For light-duty vehicles, advantage can be taken of the modeling data provided by the United States Environmental Protection Agency (EPA) for adjusting chassis dynamometers to allow accurate determination of emissions and fuel economy so that compliance with emissions standards and Corporate Average Fuel Economy (CAFE) regulations can be assessed. Initially, EPA provided vehicle-specific data that were relevant to a physics-based model of the forces at the tire-road interface. Due to some limitations of these model parameters, EPA now provides three vehicle-specific coefficients obtained from vehicle coastdown data. These coefficients can be related back to the original physics-based model of the forces at the tire-road interface, but not in a manner that allows the original modeling parameters to be extracted from the coastdown coefficients. Nevertheless, as long as the operation of a light-duty vehicle does not involve extreme acceleration or deceleration transients, the coefficients available from the EPA can be used to accurately predict fuel economy. Manufacturers of heavy-duty vehicles are not required to meet any sort of CAFE standards, and the engines used in heavy-duty vehicles, rather than the vehicles themselves, are tested (using an engine dynamometer) to determine compliance with emissions standards. Therefore, EPA provides no data that could be useful for predicting the fuel economy of heavy-duty vehicles. Therefore, it is necessary to perform heavyduty coastdown tests in order to predict fuel economy, and use these tests to develop vehicle-specific coefficients for the force at the tire-road interface. Given these coefficients, the fuel economy of a heavy-duty vehicle can be calculated for any driving schedule. The heavy-duty vehicle model developed for this project is limited to pre-2007 calendar year heavy-duty vehicles due to the adverse effects of emissions components that were necessary to comply with emissions standards that went into effect January 2007. Advisors/Committee Members: Matthews, Ronald D. (advisor), Hall, Matthew J. (committee member).

Subjects/Keywords: Fuel Economy; Fuel Economy Modeling; Light-Duty; Heavy-Duty; Automotive; Vehicle; Coastdown; Coast-down; AVL ADVISOR; AVL CRUISE; AVL BOOST

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ates, Murat, 1. (2009). Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2009-05-80

Chicago Manual of Style (16th Edition):

Ates, Murat, 1982-. “Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study.” 2009. Masters Thesis, University of Texas – Austin. Accessed March 01, 2021. http://hdl.handle.net/2152/ETD-UT-2009-05-80.

MLA Handbook (7th Edition):

Ates, Murat, 1982-. “Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study.” 2009. Web. 01 Mar 2021.

Vancouver:

Ates, Murat 1. Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study. [Internet] [Masters thesis]. University of Texas – Austin; 2009. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2152/ETD-UT-2009-05-80.

Council of Science Editors:

Ates, Murat 1. Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study. [Masters Thesis]. University of Texas – Austin; 2009. Available from: http://hdl.handle.net/2152/ETD-UT-2009-05-80


Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

2. Triantafyllopoulos, Georgios. Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions.

Degree: 2018, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

In the context of this dissertation, the fuel consumption and emissions of many vehicles were measured under various driving conditions and emission and consumption reduction technologies were investigated. The impact of conventional fuel consumption reduction technologies was simulated by modeling a gasoline and diesel vehicle under NEDC, WLTP and CADC driving cycles, using the AVL Cruise platform. The technologies tested include brake energy recuperation, start-stop, vehicle mass reduction, aerodynamic resistance reduction, rolling resistance reduction, gearbox changes and engine efficiency improvements. Each technology has a different impact on each driving cycle, while the overall reduction in fuel consumption and CO2 emissions achieved by combining all technologies was in the range of 12-14%. Concerning pollutant reduction technologies, the possibility of reducing NOx emissions of a Euro 6b diesel vehicle was studied. Initially, the vehicle was tested on the road following the RDE regulation where it emitted 5 times more NOx than the 80 mg/km limit. The vehicle’s engine operation was simulated on a laboratory dyno, where an identical engine was installed. Modifications were made to the exhaust aftertreatment system, including the replacement of the LNT system with an SCR system. The modifications reduced NOx emissions by 90%, achieving compliance with the Euro 6 limits without requiring any additional fuel consumption. The effect of driving conditions on emissions and fuel consumption was then addressed. In particular, three Euro 6 diesel vehicles were tested in the NEDC, WLTP, CADC driving cycles and on the road, on normal RDE-compliant routes and other more dynamic ones. The emissions reduction strategy of the three vehicles seems to be exclusively targeting the NEDC cycle, as at non-NEDC operating conditions the use of anti-pollution systems is minimized. WLTP emissions were closer to the emissions measured under real conditions; however, the engine operating range during the road tests was greater than the range during laboratory tests. In addition, NOx emission levels increase dramatically when driving the vehicle in a more dynamic manner outside the boundaries of the RDE regulation. Finally, on-road emissions measurements were carried out on a fleet of eight vehicles, two diesel, one gasoline, one LPG vehicle, one CNG, one hybrid and two older gasoline vehicles which had been converted to gasoline-LPG dual fuels. No fuel/engine type had low CO2, CO and NOx emissions over the full range of real world driving conditions. However, it is worth mentioning that the older gasoline-LPG vehicles had the worst emission performance, the CNG vehicle had the lowest CO2 emissions and the hybrid had the lowest CO and NOx emissions combined. With regard to conventional vehicle types, diesel vehicles had very high NOx emissions, while gasoline vehicles had extremely high CO emissions under dynamic driving conditions, reaching 35 times the regulatory limits.

Στα πλαίσια της παρούσας διατριβής αποτυπώθηκαν οι εκπομπές και…

Subjects/Keywords: Εκπομπές οξειδίου του αζώτου; Εκπομπές διοξειδίου του άνθρακα; Εκπομπές CO2; Εκπομπές NOx; Εκπομπές καυσαερίων; Μείωση εκπομπών; Ντίζελ; Εκπομπές σε πραγματικές συνθήκες οδήγησης; Κύκλος οδήγησης; RDE; CO2; NOx; Diesel; Euro 6; Vehicle emissinos; LPG; CNG; NEDC; WLTP; CADC; AVL Cruise; Fuel consumption; Emission reduction; Driving cycles

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Triantafyllopoulos, G. (2018). Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions. (Thesis). Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/45500

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Triantafyllopoulos, Georgios. “Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions.” 2018. Thesis, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Accessed March 01, 2021. http://hdl.handle.net/10442/hedi/45500.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Triantafyllopoulos, Georgios. “Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions.” 2018. Web. 01 Mar 2021.

Vancouver:

Triantafyllopoulos G. Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions. [Internet] [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2018. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10442/hedi/45500.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Triantafyllopoulos G. Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions. [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2018. Available from: http://hdl.handle.net/10442/hedi/45500

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.