Getting better efficiency out of a bus than a Smart fortwo is no easy task. However that's what the latest startup to emerge out of Silicon Valley is claiming. Adura Systems has announced that its new MESA powertrain architecture using lots of claims and buzzwords but little in the way of actual details. The heart of the system appears to be modularity, although it's not really apparent what the innovation is here. All such systems contain some degree of modularity. The company is claiming it can get from 25-100 miles of electric range depending on how many battery modules are installed. Again, nothing really earth shattering here, more battery storage, more miles. The system can also be configured as a range-extended/series hybrid system getting up to 50 mpg. Supposedly, it will demonstrated on some Chinese buses within the next year. We'll keep an eye open to see if Adura actually has anything new.

[Source: Adura Systems]


Adura Systems Introduces New Era Electric Powertrain

brings up to 100 miles of pure electric range to mass transportation buses

intelligent system featuring innovative energy storage and power management coming to North America and Asian markets

MENLO PARK, Calif., April 20, 2009-Adura Systems, Inc., the green powertrain company that has been in stealth mode for the past two years, today announced that it is bringing to market a powertrain that offers first-in-kind, electric-range capabilities and industry breakthroughs in terms of improved fuel economy and exceeding future emissions standards. The company's new era electric MESA™ (Modular, Electronic, Scalable Architecture) powertrain, for use in series hybrid, all electric and fuel cell mass transportation buses, large utility vehicles and other automotives provides fuel economy on par with SmartCars.

Adura's MESA powertrain features patent pending, highly modular systems electronics, an innovative intelligent control software platform and the industry's first scalable, field installable energy storage system that can be configured, depending upon users' requirements, to provide 25, 50 or even 100 miles of initial travel in pure electric mode with subsequent travel in hybrid mode. Combined with an onboard microturbine generator for extended range, MESA dramatically lowers emissions and reduces operating costs for buses and large utility vehicles by 50 percent or more vs. standard diesel powertrains. MESA is slated for initial deployment in mass transportation hybrid buses in China, with U.S. implementations following.

"Until now, powertrain developments have been initiated more from a mechanical systems integration approach, resulting in marginal fuel economy advantages and relatively few miles of electric range," said Marv Bush, CEO of Adura. "Adura's team of world-class software and electronics engineers took a ground up approach with MESA, creating intelligent electronics, software and energy storage technology that is lighter weight, offers optimized electric range and at a lower total cost of ownership vs. other hybrids currently offered for heavy-duty vehicles. While our product can scale to many types of automotives, we are first pursuing heavy-duty buses and large utility vehicles as there is great demand from municipalities and government institutions for better solutions at lower acquisition costs that provide near zero emissions, greater fuel efficiency and reduced maintenance expenditures."

First Deployment

The first deployment of MESA is to occur in China within the next 12 months. This milestone follows a partnership agreement formed between Adura with the China Automotive Technology and Research Center (CATARC) in May 2008. Adura is also negotiating contracts in the U.S.

Mr. Yonghe Huang of the China Automotive Technology and Research Center in Tianjin, China stated, "Adura's powertrain integrating the turbine in the hybrid-electric technology system will become a revolutionary 'green' ground transportation propulsion system for buses. The Chinese government is enthusiastic to support energy-saving technology for the automotive industry. We look forward to the technical cooperation with Adura to contribute to China's energy-saving goals in the automotive industry."

Reduction in Emissions

While the automotive industry is challenged with meeting emissions standards for 2011, Adura's MESA already meets U.S. 2017 CAFÉ and Euro VI standards. In fact, due to its electric range and emissions friendly range extender Adura's MESA can save 37,000 tons of climate-changing emissions per eight year bus life. As an example, in China there are 1.3 million buses. If the existing diesel powertrains were replaced with MESA, that could equate to about 6.1 billion tons of reduced emissions per year . Adura's MESA delivers improvements in emissions and fuel economy as follows:

· City buses can run approximately 100 miles/day in pure-electric mode

· City buses traveling 130 miles/day with a 100 mile energy storage capacity will get an average of 50 miles per gallon (MPG) vs. traditional buses which operate around 5 MPG.

Emissions may be monetized at a cost of $10/ton. If so every bus containing MESA could generate $370,000 from emissions' carbon credits.

Innovative Architecture

Adura's propriety MESA consists of several key modules backed by patent-pending electronic and software technology enabling nearly 10X more electric range vs. other hybrid powertrains for mass transportation buses and large utility vehicles. These modules include:

mCtrl-This first of a kind systems control that optimally and intelligently manages and controls all aspects of the modular system. Designed from the ground up, the system features power management electronics and component electronics that control the MESA modular energy storage system (mStor), electric Generator module (mGen) and the electric motor module (mDrive). mCtrl is designed to ensure high reliability, overall system efficiency, serviceability, and fault tolerance.

mStor-This patent-pending, economical, scalable user installable energy storage system can be configured to provide 25, 50 or 100 miles of electric range in heavy transit buses. mStor modules can be easily added or subtracted to meet users' varying electric mode requirements. The breakthrough mStor modular battery system is fault tolerant, chemistry agnostic and allows the mixing of battery chemistries within the storage system.

mBridg-is the interface between the System, the bus accessories and infotainment. It provides the driver interfaces and the near real-time automated systems maintenance diagnosis and reports for the driver and maintenance support staff.

mGen-enables the use of diesel, microturbine and fuel cells as sources of onboard electricity generation. mGen intelligently charges the energy storage system modules (mStor) when low state-of-charge conditions arise.

mDrive-the electric motor provides propulsion to the bus and provides regenerative breaking. The system motor is optimally controlled by mCtrl to deliver smooth, efficient acceleration and breaking. There is no transmission-the motor connects directly to the driveshaft.

Kevin Mak, analyst, automotive electronics service at Strategy Analytics, Inc. noted, "Vehicle makers are facing severe challenges over emissions and fuel economy. Diesel engines offer good economy, but need costly after-treatment. Gasoline hybrids are expensive. Adura's modular hybrid approach, with its micro-turbine generator, is an innovative alternative that offers the potential to cut both emissions and costs."

About Adura Systems

Adura Systems, Inc. is the clean technology leader in electric powertrains for transportation industries. The company's technology-leading systems, for the mass transportation market, enable near zero emissions and breakthroughs in electric range. Adura addresses the key challenges industry and manufacturers face today: cost, fuel consumption, emissions, range and robust power. Adura is headquartered in Menlo Park, CA and has offices in Shanghai, China. For more information, see

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