Title from PDF of title page (University of Missouri--Columbia, viewed on June 8, 2012). ; The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. ; Thesis advisor: Dr. Noah Manring ; Includes bibliographical references. ; M. S. University of Missouri--Columbia 2011. ; "December 2011" ; Increasing petroleum prices and environmental concerns have caused a demand for more fuel efficient vehicles. Hybrid vehicles provide a solution to this demand, and hydraulic hybrid vehicles are shown to have a cheaper cost of ownership compared to electric hybrid vehicles. A hybrid drivetrain with a hydraulic continuously variable transmission (CVT) is modeled to include efficiency information of the engine and hydraulic components. Since the expressions comprising the model can be set as functions of a control input, which is related to the swashplate angle of the hydraulic motor in the CVT, an optimization algorithm can determine a control input that maximizes the overall vehicle efficiency allowing the vehicle to increase its fuel economy. Simulations are conducted using two driving schedules: one to represent city driving and the other to represent highway driving. Based on the results of these simulations, the hybrid vehicle produces a 1.28% increase in fuel economy over a similar conventional vehicle in city driving and a 22.62% increase in fuel economy for highway driving.
Modeling a hydraulic hybrid drivetrain : efficiency considerations
2011-01-01
Hochschulschrift
Elektronische Ressource
Unbekannt , Englisch
DDC: | 629 |
Hydraulic hybrid drivetrain and method for operating a hydraulic hybrid drivetrain
Europäisches Patentamt | 2015
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