JMU AFV Lab Blog

This article came across on the “Gas2.0″ blog on October 16. Students at the University of Kansas have produced an interesting hybrid vehicle. They took an old VW Super Beetle and converted it to electric power by replacing the conventional gasoline engine with an electric motor and batteries. (Wow, you’re thinking that’s not really original, is it?) But they went a step further and installed a diesel engine/generator in the front compartment of the VW to charge the batteries. But the students didn’t stop there, either. They designed the system in such a way that an ethanol, fuel cell, or gas turbine engine/generator could be substituted for the diesel setup with minimal alterations. Impressive, don’t you think?

To see this article, go to http://gas2.org/2009/10/16/kansas-students-run-retro-vw-beetle-on-batteries-and-biodiesel/

To view the students report on the project, go to http://groups.ku.edu/~ecohawks/IMECE2009-10247.pdf
(JMU AFV Lab students should take notice of this file and consider it when they report on their own projects.)

Kansas Students Run Retro VW Beetle on Batteries and Biodiesel

Written by Andrew Williams

A group of University of Kansas students have rigged up a 1974 Volkswagen Super Beetle to run on a mix of biodiesel and battery power.

The team, calling themselves the Ecohawks, claim the quirky hybrid is capable of getting 50 MPG from a series of 10 lead-acid batteries and a biodiesel generator.

Performance-wise, although quite cool looking in a retro kind of way, the car isn’t exactly what you’d call a speedster, topping out as it does at a leisurely 30 mph.

That doesn’t seem to bother team-leader Prof. Chris Depcik though, who told reporters, “We have driven it around and reached approximately 30 mph, but this was more of a proof-of-concept drive without pushing the boundaries. We are currently getting the vehicle into road-ready shape to be driven safely in order to determine these values.” (More pics after the jump).

• » See also: Update: Breakthrough Biodiesel Process Now Running At Commercial Scale
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Depcik says that given the mass availability of Beetle parts, (VW built 21.5 million of them before ceasing production in 2003), the choice of car was a no-brainer and estimates that it will be ready to pass a Kansas state inspection “with flying colors” by May 2010.

Saw this blog entry this morning and thought it made some interesting points. Check it out at http://gas2.org/2008/09/30/volt-over-tesla-series-and-plug-in-hybrids-more-likely-to-be-game-changers/. Especially scroll down and look at the comments others have already made.

Volt Beats Tesla: Series and Plug-In Hybrids More Likely to be Game Changers
Written by Andrew Gilbertson
Published on September 30th, 2008
9 Comments
Posted in Engines, Hybrid-electric EVs, Plug-in hybrid EVs

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Editor’s Note: This is a guest post by Andrew Gilbertson who is a 2008 graduate of Vermont Law School.
A senior economist at the Argonne National Laboratory has come to an interesting conclusion: vehicles that rely on internal combustion engines are superior to electric vehicles in terms of what consumers would buy and what would save significant fuel.

Even though Tesla is delivering their cars to consumers several years before the Volt hits the show rooms, from the perspective of Dan Santini, you and I are more likely to get our hands on Volt-style vehicles first.

Some of the main obstacles that stand between us and pure EVs were identified at the 1st International Conference on Advanced Lithium Batteries for Automotive Applications, sponsored by the Argonne National Laboratory (where Dan Santini works).

First and foremost, the cost of the batteries boost vehicle prices too high for the average consumer. Recharging time, coupled with the lack of a national system of quick-charge stations, would make the vehicle unattractive to most consumers who want the freedom to travel across the country without long stops for recharging.

The Volt, with its series hybrid design, reduces the importance of these two concerns. By relying less on batteries, the cost of the batteries becomes less of a factor, while having a combustion engine that uses an established distribution system as a backup gives the owner the freedom to drive wherever they want.

It seems to me that more car makers should read the writing on the wall and go the series hybrid route (apparently, some are).

Even though series hybrids might not get better mileage right now, it should be obvious that at some point an energy storage technology will be developed that will be cheaper, denser, and cleaner than gas or diesel. When that time comes, the car makers that can simply replace the combustion generators with the new storage technology will be way ahead of the ones who haven’t yet developed a electric drive system.

I saw this article in ScienceDaily and was fascinated by it. (For more on this idea, go to this article at greencarcongress.com.) It seems like such an “elegant” idea to generate electricity for a hybrid vehicle. Being the questioning person I am, I immediately wondered why they would use permanent magnets instead of an electromagnet in the core of the “alternator.” After all the alternator in modern motor vehicles uses a small wire wound electromagnet as the “rotor” and a relatively larger coil as the “stator” to produce electricity to recharge the battery and provide power for electricity needs of the vehicle. These alternators use slip rings with carbon “brushes” to transmit voltage to the rotor to energize it. In this “Linear Alternator,” instead of rings, linear strips of metal on the connecting rod with brushes attached to the case could energize the coil.  Of course proper orientation of the moving coils and their magnetic lines of flux relative to the orientation of the stationary, current producing, coils would have to be taken into consideration.  My opinion is that the engine would have to be “fatter” in the alternator section to be more effective as an alternator.  What do you think?  (I can see this as a future project for the AFV Lab.)

free-piston-linear-alternator

ScienceDaily (Sep. 17, 2008) — In an advance toward introduction of an amazing new kind of internal combustion engine, researchers in China are reporting development and use of a new and more accurate computer model to assess performance of the so-called free-piston linear alternator (FPLA).

Their study of the FPLA, which could provide a low-emission, fuel efficient engine for future hybrid electric vehicles, is scheduled for the Sept. 17 issue of ACS’ Energy & Fuels, a bi-monthly journal.

Qingfeng Li and colleagues point out that the FPLA has only one moving part and is an engine designed to generate electricity. In the device, a piston in a cylinder shuttles between two combustion chambers. Permanent magnets on the piston generate electricity by passing through the coils of an alternator centered on the cylinder. The engine can burn a variety of fuels, including natural gas and hydrogen, and seems ideal use in a future world of climate change and possible fossil fuel shortages, they suggest.

Their report describes development of a better computer model to evaluate performance of the FPLA and guide engineers in construction of the engine. Results of their initial simulations showed that the FPLA could accelerate three times faster than other internal combustion engines and burns fuel in ways that minimize air pollution. “It is an environmentally friendly power source for the future,” the report concludes.

Journal reference:

1. Li, Qingfeng, Xiao, Jin, and Huang, Zhen. Simulation of a Two-Stroke Free-Piston Engine for Electrical Power Generation. Energy Fuels, 2008; DOI: 10.1021/ef800217k

Also see: http://www.greencarcongress.com/2008/09/modeling-a-free.html

This item came to my attention this morning; I have excerpted the first few paragraphs.  To read the article, go to http://web.mit.edu/mitei/research/spotlights/slash-gas.html

It’s feasible—but challenging on many fronts

How much gasoline would the nation save in the year 2035 if lightweight hybrid and plug-in hybrid vehicles dominated the marketplace? More than 68 billion gallons, or about half the fuel currently used by today’s vehicles.

Detailed analyses in a new MIT report demonstrate that such changes are feasible. Indeed, the report concludes that over the next 25 years the fuel consumption of new vehicles could be reduced by 30-50 percent and total U.S. fuel use for vehicles could be cut to 2000 levels, with greenhouse gas (GHG) emissions cut by almost as much….

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