This new green technology 40-foot bus features a high-strength stainless steel body and chassis and a hybrid power system that drives the bus primarily with stored electrical energy. This approach reverses the paradigm of conventional parallel hybrid designs that use electric energy only to supplement the acceleration and torque requirements of a diesel engine.
At the heart of the bus is a chassis made of Nitronic 30, a nitrogen-strengthened stainless steel that is stronger and stiffer than conventional steel. These attributes translate into less material required for a chassis, resulting in reduced weight.
“Nitronic stainless steel is incredibly durable and enables our chassis designs to have significantly longer service life vs. ordinary steel vehicles,” said Bruce Emmons, president of Autokinetics (http://www.autokinetics.com/) of Rochester, Mich., which developed the bus. “The fact that stainless is also 100 percent recyclable and more environmentally friendly to produce than aluminum makes this an ideal green raw material for vehicle structures.”
Additional advantages of Nitronic 30 include excellent mechanical properties at sub-zero and elevated temperatures along with low-temperature impact resistance and superb resistance to high-temperature oxidation. While this material is more costly than conventional steel, Emmons noted that the additional cost is offset by design innovation, parts consolidation and streamlined manufacturing processes.
“The benefits of improved strength-to-weight performance quickly compound to all other vehicles systems such as smaller tires, lighter brakes, batteries, motors and so on,” Emmons said. “By optimizing the total vehicle we have been able to cut the weight almost in half, which has led to performance improvements, most notably fuel economy gains.”
In addition to its reduced weight and hybrid power system, the bus will incorporate a number of advanced design features and advantages, said Gregory Fisher, chief executive officer of Fisher Coachworks (http://www.fishercoachworks.com/), which licensed the technology, has produced a prototype and plans full commercialization. The bus made its debut today and deliveries of the bus are expected to begin in 2009.
Some of the advantages are improved vehicle safety for passengers, lower cost, reduced noise and improved ride dynamics. The major advantage, though, will be in cost to operate, according to Fisher.
Specific contributions from ORNL included computer crash studies and infrared thermal imaging to evaluate the quality of some of the initial laser welds in the structure. Early tests showed some problems with the laser welding technique, so Autokinetics chose to use resistance spot welding in most places and tungsten inert gas welding for the remainder of the joining needs.
But even before its technical contributions, Emmons said ORNL had a huge impact.
“ORNL was the first to suggest the possibility of applying Autokinetics’ light-weighting ideas and technologies to the bus field,” Emmons said. “Without that insight, this program would never have happened.”
Phil Sklad of ORNL’s Materials Science and Technology Division served as the program manager and technical monitor and noted that DOE’s $2.5 million investment in this project is being rewarded with a revolutionary bus.
“This is a perfect example of how the Department of Energy, a national laboratory and the private sector can collaborate to produce something that is potentially of great value to society,” Sklad said.
Fisher Coachworks, located in Troy, Mich., is planning to use this patented technology for transit buses and other commercial vehicle market segments that would benefit from vastly improved fuel economy in urban stop and start applications. Fisher Coachworks was formed in 2007 to focus on production of advanced hybrids using an ultra-lightweight stainless steel unibody construction.
Funding for this project was provided by DOE’s Office of FreedomCAR and Vehicle Technologies Program. UT-Battelle manages Oak Ridge National Laboratory for the Department of Energy.
Ron Walli | Newswise Science News
Bremen University students reach the final at robotics competition with parcel delivery robot
19.10.2016 | BIBA - Bremer Institut für Produktion und Logistik
Discovering electric mobility in a playful way
18.08.2016 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO
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...
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...
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...
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...
'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...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences