The Influence of higher ethanol contents in the fuel on cold-start and warm-up drivability performance

  • Due to the current emission standards and the even more environmentally friendly vehicle developing. The ethanol level in the fuel has been increased more and more over the past few years. This is the reason why the manufactures must look out for while developing the engine management software. To get a subjective point of view of what happens with this increase, a universal test procedure was established. A fully instrumented gasoline vehicle was tested with four test fuels. During testing the procedure had to be modified from the first seen data. That is why two Drive cycles had been generated. After the evaluation of the collected data, the influence of ethanol on the cold start and warm up phase was shown. As a result, higher ethanol content in the fuel increased hesitation and negative effect of that component. Also, it became even more clear, that this test procedure should be used for more than just one vehicle. This would help with clarifying if this effect was caused by the ethanol alone or if the software or design of the engine had an influence on it.

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Author:Tony Kriegsmann
Advisor:Helmut EichertGND
Document Type:Diploma Thesis
Language:English
Name:FEV North America Inc.
4554 Glenmeade Ln, 48326 Auburn Hills
Date of Publication (online):2019/01/14
Year of first Publication:2019
Publishing Institution:Westsächsische Hochschule Zwickau
Tag:Ethanol
Kaltstart; Warmlauf
Page Number:100 Seiten, 107 Abb., 10 Tab., 15 Lit.
Faculty:Westsächsische Hochschule Zwickau / Kraftfahrzeugtechnik
Release Date:2019/01/14