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    Vehicle Emissions and Fuel Consumption Mathematical Model Development Using Onboard Emissions Data

    , M.Sc. Thesis Sharif University of Technology Banitalebi, Ehsan (Author) ; Hosseini, Vahid (Supervisor) ; Mozaffari, Ali Asghar (Supervisor)
    To estimate vehicle fuel consumption and emissions in Tehran mega city, air pollution in urban tunnels, parkings, determination of speed limits on highways and produce required inputs of softwares that forecast dispersion and distribution of air pollution, Hot exhaust emissions model of Iranian manufactured gasoline fueled personal cars of Tehran developed. Emission factors is the most important element of model, that obtained from portable emission measurement of 30 vehicles with suitable type and mileage distribution. By averaging the results, total emission factors and fuel consumption of fleet designated, used to annual estimation. in addition with curve fit to data, emission functions... 

    An Experimental Analysis of Performance and Emission of a Light-duty Vehicle in Fuel Change from Gasoline to Gasoline and Bioethanol Blend

    , M.Sc. Thesis Sharif University of Technology Balazadeh, Navid (Author) ; Hosseini, Vahid (Supervisor)
    Increasing greenhouse gases in the atmosphere has many unpleasant consequences. Transportation sector has 23 percent allocation in emitting those gases. Alternative fuels can be considered as a solution in order to decreasing greenhouse gases and less dependency on the fossil fuels. It is noteworthy that between biofuels, bioethanol has the maximum share (based on International Energy Agency, IEA, bioethanol will hold 27 percent share in supplying energy in transportation sector). In this thesis, assessment of exhaust emissions and fuel consumption of a light- duty vehicle with the gasoline and E85 fuels is performed. Note that, engine calibration was not altered. The implemented method is... 

    Fault effect analysis of the exhaust manifold leakage for a turbocharged spark ignition engine

    , Article Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering ; Vol. 228, issue. 8 , 2014 , pp. 970-984 ; ISSN: 09544070 Salehi, R ; Vossoughi, G ; Alasty, A ; Sharif University of Technology
    Fault monitoring in internal-combustion engines is crucial for keeping the vehicle performance within the acceptable standards of emission levels and drivers' demands. This paper analyses how a vehicle's performance and engine variables are affected by a leakage fault in the exhaust manifold. The threshold leakage that causes the vehicle to exceed the emission standards is determined for a class M1 vehicle tested on a chassis dynamometer over the New European Driving Cycle. It is shown that, when a leakage of 6 mm diameter on the exhaust manifold is introduced, the vehicle emissions exceed those specified in the European 2013 on-board diagnostics standard. In addition, the effects of the... 

    Development of اot exhaust emission factors for iranian-made euro-2 certified light-duty vehicles

    , Article Environmental Science and Technology ; Volume 50, Issue 1 , 2016 , Pages 279-284 ; 0013936X (ISSN) Banitalebi, E ; Hosseini, V ; Sharif University of Technology
    American Chemical Society  2016
    Emission factors (EFs) are fundamental, necessary data for air pollution research and scenario implementation. With the vision of generating national EFs of the Iranian transportation system, a portable emission measurement system (PEMS) was used to develop the basic EFs for a statistically significant sample of Iranian gasoline-fueled privately owned light duty vehicles (LDVs) operated in Tehran. A smaller sample size of the same fleet was examined by chassis dynamometer (CD) bag emission measurement tests to quantify the systematic differences between the PEMS and CD methods. The selected fleet was tested over four different routes of uphill highways, flat highways, uphill urban streets,...