Assessment of Hybrid-Electric Transit Bus Technology (2009) / Chapter Skim
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41.1 Problem Statement and Research Objective The objective of this research was to develop guidelines to assist transit managers in the assessment, selection, and implementation of hybrid-electric technology options for transit buses. Two distinctly different driving forces exist for the adoption of advanced transit bus technology.
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• Task 7: Used data collected in Task 6, updated and expanded the LCC analysis from Task 3. • Task 8: Prepared the draft guidelines.
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In a mild hybrid, the propulsion source is mainly from the conventional engine. When it is needed, extra power can be taken from the electric motor, which cannot operate independently from the engine.
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Series Hybrid-Electric Drive A series HEV typically consists of an engine directly connected to an electric generator (or alternator)
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8Transmission Drive Motor Inverter & Controller Engine Batteries Mechanical Energy Flow Electrical Energy Flow Final Drive Figure 1.4. Parallel hybrid-electric drive system: simple configuration.
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