Loading...
HomeMy WebLinkAboutHybrid_BrochureAssembly of the Oshkosh Transit System hybrid buses was com- pleted in the USA (St. Cloud, MN). Over 75% of hybrid bus components were of US content. 926 Dempsey Trail Oshkosh, WI 54902 Phone: 920-232-5340 Fax: 920-232-5343 www.oshkoshtransit.com Going Green with OTS Transportation by bus has a significant positive impact on many aspects of our community, including the environment. The environmental benefit of public transit is magnified by the use of hybrid buses, but it is also a benefit to riding all Oshkosh Transit buses. Individuals that choose to take the bus, instead of their per- sonal vehicle, reduce fossil fuels consumed, lower carbon emissions, and decrease conges- tion in the City of Oshkosh. These daily bene- fits help to improve the air we breathe, de- crease our dependence of fossil fuels, lessen traffic and reduce the need for more parking space. Quick Facts: Each day, OTS buses provide approxi- mately 3,000 rides. One full load of bus riders can take 30 or more cars off the road. Each year, OTS provides 2,800 trips where the rider uses the bus bike rack to carry his/her bike. Public transportation’s overall effects save the United States 4.2 billion gallons of gasoline annually: more than 3 times the amount of gasoline imported from Kuwait.* Communities that invest in public transit reduce the nation’s carbon emissions by 37 million metric tons annually: equivalent to if the combined areas of New York City; Wash- ington, DC; Atlanta; Denver; and Los Angeles stopped using electricity.* *Source: American Public Transit Association WWW.OSHKOSHTRANSIT.COM 902-232-5340 Go Green with OTS! Oshkosh Transit System Oshkosh Transit System Oshkosh Transit System hybrid buses were funded entirely by a $2.1 million Federal Transit Administration grant under the 2009 American Recovery and Reinvestment Act. Become a fan of OTS! Search “Oshkosh Transit System” HHH YBRIDYBRIDYBRID B B B USUSUS III NFORMATIONNFORMATIONNFORMATION Hybrid Bus Project Timeline March, 2009—OTS awarded an American Recovery & Reinvestment Act grant to pur- chase four 40-foot hybrid buses November, 2009—OTS awarded hybrid bus contract to New Flyer USA Inc. Spring-Summer, 2010—Hybrid buses assem- bled in St. Cloud, MN July-August, 2010—4 hybrid buses delivered to Oshkosh September 21, 2010—Hybrid buses put into service for OTS riders How does a hybrid bus operate? A hybrid bus uses power from a diesel en- gine and electric motors. A computer deter- mines the most efficient way to propel the bus. During operation, electric motors pro- vide the initial propulsion force required to accelerate the vehicle from a standstill (0-12 mph). At speeds above 12 mph, the diesel engine primarily propels the vehicle. OTS’s hybrid buses blend electric and me- chanical drive paths, which is called a paral- lel hybrid system. The diesel engine is con- nected to a drive unit (contains electronic motors/generators and gears). A simple model of a parallel system is illustrated in Figure 1 below. Since bus service requires a lot of start and stop operation, the hybrid system relies on electric motors during initial acceleration and reduces power normally supplied by a diesel engine. Figure 1: Parallel Hybrid System Oshkosh Transit System Hybrid Vehicle Specifications Model New Flyer DE40LF Build Year 2010 Vehicle Type Assembly Location St. Cloud, MN Length, Width, Height 40.8 ft., 8.5 ft., 11.1 ft. Vehicle Weight (approx.) 31,080 lbs. Engine Cummins ISL07 Horsepower 280 HP—900ft-lb. Engine and Fuel Fuel Ultra low sulphur diesel Useable Fuel Capacity 125 U.S. gallons Hybrid Drive System Drive Unit *Allison Ev 40 Drive *Max. output speed 3300 RPM *Max. Output torque dur- ing propulsion 3500 ft-lb. *Max. regenerative torque during braking 1400 ft-lb. Energy Storage Sys- tem (ESS) Allison nickel-metal hy- dride battery pack (roof- mounted) Dual Power Inverter Module Allison hybrid inverter What are the benefits of hybrid buses? Energy Savings Use 20% less diesel fuel than conventional diesel buses Over a 12-year expected life of the hybrids, OTS will save more than 86,000 gallons of diesel fuel Greenhouse Gas Reductions Compared to conventional diesel buses, hybrids produce fewer emissions. Less nitrogen oxide, carbon monoxide, hy- drocarbons, and particulate matter Maintenance Savings A regenerative braking system increases the life of brakes. The diesel engine lasts longer with less wear & tear The drive unit requires less maintenance than a standard transmission Reduced Noise With use of electric motors, hybrid opera- tion is quieter than conventional diesel buses Diesel Engine Drive Unit (contains gears and electric motors/ generators) Drive Line - Final Drive Batteries Dual Power Inverter How is electricity generated? Hybrid buses generate electricity in two ways. First, the electric motors in the drive unit are also generators of electricity. During cruising speeds, the diesel engine propels the vehicle and turns the motors/generators in the drive unit, which produces electricity. Second, the motors/generators in the drive unit are driven by the weight of the vehicle, through the drive- line, anytime the bus is slowing down. This process, known as “regenerative braking,” also slows the vehicle by im- posing drag on the driveline. An energy storage system (mounted on the roof), consisting of a nickel-metal hydride bat- tery pack, stores the generated electricity.