Over the last few years, a new and cost-effective pneumatic regenerative engine braking (RegenEBD) concept has been researched and developed in order to improve the fuel economy of inner city buses. The RegenEBD concept is realised by swapping a standard engine braking device from the exhaust side to the intake side and implementing a proprietary one-way intake design. The engine is operated as a compressor during the vehicle deceleration through the action of RegenEBD so that the vehicle's kinetic energy can be converted into pneumatic energy in the form of compressed air. Regenerative stop-start can then be realised through the use of a standard air starter motor. In this paper, the prototype RegenEBD engine and bus are first presented. This is followed by a discussion on the engine testing results and preliminary bus driving tests. Experimental results show that the fuel economy can be improved by 5-10 % for inner city buses, and there is potential for improved vehicle performance through instant boost by the regeneratively produced compressed air.
Improvement of Fuel Economy and Vehicle Performance Through Pneumatic Regenerative Engine Braking Device (Reneged)
2012
12 Seiten
Aufsatz (Konferenz)
Englisch
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