The authors have developed a capacitor hybrid vehicle equipped with a newly developed capacitor system and a miller cycle CNG engine for low floor urban buses. The CNG engine drives a generator at over 40 % thermal efficiency. The newly developed capacitor system, since it has high energy and power density, is able to regenerate almost all the braking energy of a 14-ton bus at over 90 % charging efficiency. The internal resistance of the capacitor system is minimized by the capacitor itself and a new capacitor connection. Furthermore, the voltage dispersion of the capacitor cells is minimized by the capacitor charging control system. The fuel economy was improved by 166 % compared with the CNG low-floor bus and the vehicle efficiency reached over 45 % in the M15 mode test.
Development of capacitor hybrid system for urban buses
Entwicklung eines Hybridantriebs für einen Stadtbus auf Basis von Doppelschichtkondensatoren
JSAE Review ; 23 , 4 ; 451-457
2002
7 Seiten, 17 Bilder, 1 Tabelle, 5 Quellen
Aufsatz (Zeitschrift)
Englisch
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