Hyundai Delivers Tucson Fuel Cell Vehicles to AC Transit for Demonstration and Testing
DOE Funds Four Coal Gasification and Coproduction Research Projects

Enova in Hybrid School Bus Project with Truck Manufacturer

Enova Systems has entered into a joint Hybrid-Electric School Bus program with a major North American Truck Manufacturer.

The School Bus project will feature Enova’s post-transmission 80-kW Hybrid Drive System and has the potential to lead to future production 2006 and beyond. A prototype is scheduled to be completed before 31 December 2005.

The partner currently sells some 60,000 school buses per year in the US, according to Enova.

Hybrid-Electric School Buses haven’t received a great deal of publicity, but there is some industry attention focused on the area.

Both Thomas Built Buses (which is a subsidiary of Freightliner, itself in turn a subsidiary of DaimlerChrysler) and International Truck and Engine Corporation are Advisory Board members for the Hybrid Electric Bus Project, which was formed in 2003 in North Carolina, is run by Advanced Energy, and received both state and federal funding this year.

Advanced Energy advocates a hybrid-electric school bus project as the pilot program for four reasons:

  1. The duty cycle of school buses makes them an ideal candidate for hybrid technology, particularly plug-in hybrid technology.

  2. Hybrid bus technology, especially plug-in hybrids, dramatically reduce the environmental impacts of school buses by:

    • improving the efficiency of energy use resulting in fewer emission per mile;
    • replacing mobile sources with stationary central power plant sources, that are already much cleaner and easier to control (plug-in); and
    • moving emissions from daylight hours to night time hours, reducing the creation of ozone and smog (plug-in).

  3. Hybrid school buses are not available on the market. The technology, however, has been demonstrated on transit buses. In addition to researchers and public interest entities, moving this technology into the market for school buses will require the involvement of bus operators, bus manufacturers and vendors to the bus manufacturers who can provide the necessary technology.

  4. In North Carolina of all miles driven by buses, roughly 78% of those miles are school bus miles.

The current Enova school bus project is not a plug-in project: the post-transmission parallel hybrid architecture doesn’t offer an electric-only mode. But a visible application of a hybrid drivetrain in a school bus could begin to move things along.




in addition, the amount of time school buses spend idling makes them perfect candidates for hybrid powertrains.
it'd be nice if they hurried up with this.


One thing that has always amazed me is that when busses stop at the schools to pick up or drop of the kids they always leave the engines idling and the kids breath in all that diesel exhaust -- a hybird with no idling would be perfect for school busses!


I think it's a great project! But why school buses? They are mere part of the air pollution.


I think the time for a Hybrid School Bus has arrived. I drive 160 miles a day. 90% under 30 mph.
I stop on average every 100 feet. I have 4 tiers in the A.M. and 3 in the P.M.Total 140 children. My current Bus is 5 years old and averages 6 mpg.There are over 500,000 School Buses on the Nations roads right now.The savings in health alone makes it worth it, not to mention the reduction in hazardous emissions.I'll take a Hybrid any time.

The comments to this entry are closed.