Transportation & Fuel Source Technology
Diesel Hybrid School Buses Give California Legislators New Tool to Reduce Emissions
Top lawmakers received a
glimpse of the future for clean and efficient student transportation as
Navistar International Corporation debuted one of the first diesel hybrid
school buses here today. Company representatives highlighted the potential
for this innovative technology to help meet California's climate change,
energy efficiency and clean air goals, and they urged government officials
to provide incentives that will expand the market for these pioneering
"School buses are the safest way for children to travel to school,"
said Patrick Charbonneau, Navistar International Corporation, vice
president, government relations. "Now thanks to Navistar's new Green Diesel
Hybrid(TM) technology, the trip can also be clean, fuel efficient and
significantly lower in greenhouse gas emissions."
Advances in diesel engines, fuels and exhaust control technology during
the past decade have reduced key emissions from new school buses by more
than 90%. However, of the nearly 30,000 school buses that transport
California students every day, almost half are more than ten years old,
according to a report by the Union of Concerned Scientists.
To upgrade this aging fleet, voters dedicated $200 million last fall
for new, clean school buses as part of Proposition 1B. This substantial
funding contained in the Transportation Infrastructure Bond puts California
in position to be the nation's leader in diesel hybrid school buses.
"Diesel hybrids offer the most advanced alternative for progressive
school districts looking to modernize their fleet," continued Charbonneau.
"Government incentives to replace aging school buses with new diesel hybrid
buses will extend environmental and energy-efficiency benefits in
California's school bus fleets and help reduce greenhouse gas emissions."
According to Navistar, plug-in diesel hybrids produce 30%-60% lower
greenhouse gas emissions and deliver up to 70%-100% better fuel economy
when compared to conventional buses. These improvements could play a key
role in meeting California's commitment to reduce greenhouse gases 25% by
Navistar, through its subsidiary IC Corporation, is the largest school
bus manufacturer in North America and the first to introduce a diesel
hybrid plug- in option. The company's Green Diesel Hybrid(TM) school bus
couples an International(R) VT365 V8 diesel engine with a hybrid-electric
powertrain that includes a specially designed transmission, batteries and
permanent magnet motor. The system recovers kinetic energy during braking
and uses it to charge the batteries, making hybrid school buses ideal
applications because of the frequent starting and stopping. This stored
energy provides additional power for acceleration and reduces idling.
In addition to school buses, diesel-electric hybrid has application in
waste handling trucks, utility company service vehicles, long-haul highway
trucks, and local-delivery trucks and vans. Along with the Green Diesel
Hybrid school bus, Navistar
also displayed a utility truck outside the
"This technology will provide our customers a new option in sustainable
diesel transportation while providing policymakers another very strong
answer to global warming," concluded Charbonneau.
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