Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Hybrid buses operate with lower emissions, greater fuel efficiency


A recently released study by the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL) concludes that hybrid buses operate with lower emissions and greater fuel efficiency than conventional diesel buses.

The year long evaluation of 10 prototype diesel hybrid-electric buses in the Metropolitan Transportation Authority’s New York City Transit (NYCT) fleet of 4,489 buses showed that these hybrid buses have a 10 percent higher in-service fuel economy. According to chassis dynamometer emissions testing, the hybrid buses had 36 percent lower oxides of nitrogen and 50 percent lower particulate matter emissions than diesel buses on a central business district cycle.

"Taking the state of the technology into consideration, we think hybrid-electric buses are going to make a very positive impact on our fleet," said Bill Parsley, NYCT’s director of research and development. NYCT has awarded contracts for an additional 125 hybrid buses in 2002 and 200 hybrid buses in 2003.

The NREL report, NYCT Diesel Hybrid-Electric Buses: Final Results, summarizes the work completed during the yearlong Transit Bus Evaluation Project to collect fueling, maintenance, performance and emission data from NYCT.

While the hybrid buses have greater fuel economy than diesel buses, maintenance costs were significantly higher due in part to the maturity level of the hybrid propulsion system. These costs are expected to drop as the technology advances.

The evaluation was funded by DOE’s Office of Heavy Vehicle Technologies and Office of Technology Utilization’s Field Operations Program and managed by NREL. It began after NYCT purchased the prototype diesel hybrid-electric buses from Orion Bus Industries with BAE SYSTEMS’ HybriDriveTM propulsion system after the success of an early prototype hybrid bus project.

The final results report and two additional reports related to this Transit Bus Evaluation Project, NYCT Diesel Hybrid-Electric Buses: Program Status Update and NYCT Diesel Hybrid-Electric Buses: Final Data Report, are available through NREL’s Alternative Fuels Data Center, or 1-800-423-1DOE.

Sarah Holmes Barba | EurekAlert!
Further information:

More articles from Transportation and Logistics:

nachricht Bremen University students reach the final at robotics competition with parcel delivery robot
19.10.2016 | BIBA - Bremer Institut für Produktion und Logistik

nachricht Discovering electric mobility in a playful way
18.08.2016 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO

All articles from Transportation and Logistics >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>