A More Efficient Hybrid?

Will the flywheel overtake the battery in the hybrid of tomorrow? Quite possibly!

If you have ever ridden a bicycle or watched a potter's wheel, you have seen a flywheel in action. When you pedal a bike, the wheels continue to spin even when you are not pedaling because the pedal energy has been stored and then released through the wheel.

Although flywheels have been known since ancient time, only now has their automotive potential become apparent.

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In an article by Gizmag.com, Williams Formula 1 (F1) racing was looking for a solution to capture, store and use brake force energy (Kinetic Energy Recovery System KERS). While they had considered the typical battery solution, but found that a flywheel was lighter and more efficient. Were that the whole story, it would be great, but wait, there's more!

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Williams created a separate company, Torotrak, to apply the flywheel KERS system to automobiles and found, surprisingly, that buses behave in a manner similar to F1 race cars. The similarity is found in the stop-start nature of buses and time between energy capture and release in F1 cars.

Here is a video explaining the flywheel's use in F1 racing.



What makes this concept economically efficient, and could possibly spell the end to the battery hybrid is that it can be retrofitted to existing transmissions and is more efficient. From the article:

“Our solution offers a much shorter pay back time on investment and does not reduce the number of passengers that can be carried,” explains Chris Brockbank of Torotrak. “It is also a fundamentally more efficient approach as energy remains in the mechanical state; with electrical regeneration there is an efficiency loss at each state change from mechanical to electrical to chemical and back again.”

Consider the economic benefits of a flywheel system versus a chemical battery. The flywheel is lighter, generally made of recyclable materials, and uses less hazardous materials than batteries. Additionally, they can be easily (relatively speaking) retrofitted onto existing transmissions. Finally, there are fewer components. Although I am huge fan of the hydraulic hybrid, the need for a direct drive transmission is slowing its development. However, if the flywheel technology proves itself, the need for hydraulic hybrids may no longer exist.

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In the examination of hybrids, like any other capital investment, one has to consider if the money spent will provide larger returns. When considering a technology that can possibly deliver a 30% improvement in fuel economy and can reasonably be retrofitted to existing automobiles, it may make sense. I look forward to seeing the results of the continued studies and will report back with any updates.

Big Green Trucks

Be sure to enjoy the new article about flywheel hybrids here!

Hybrids got a lot of press when gas was $4 a gallon, but now that it is below $2, does anybody care? Well, Eaton does.

Eaton has been in the power, hydraulics, and automotive business for quite some time, quietly developing new technologies used in most cars, trucks, and heavy trucks today. Cheap? No. 100% Free. Trade stocks for free on Zecco.com. The Free Trading Community. www.zecco.com

As I have written previously in "Hybrid Hummer Hums," Eaton was a main supplier in the hydraulic units for that vehicle. In this article, I will discuss two Eaton implementation of hybrid technologies.



Parallel Hybrid System
The picture above graphically displays Eaton's Hydraulic Launch Assist system, a heavy vehicle (garbage truck) with a standard engine, and hydraulic system is supplemental power. It is designed to capture energy through regenerative braking, store it in hydraulic fluid, and then use it to "launch" the vehicle from a stop.

From Eaton's web site, "During acceleration, fluid in the high-pressure accumulator is metered out to drive the pump/motor as a motor. The system propels the vehicle by transmitting torque to the driveshaft." This system is able to work in either Economy or Performance mode. The difference being that engine doesn't perform acceleration until after the hydraulic system is spent in Economy mode, while in Performance mode, both the engine and hydraulic system work together. In either case, Eaton predicts a 20-30% fuel efficiency increase.

Series Hybrid System
A series hybrid varies from a parallel system in that, "... conventional transmission and driveline are replaced by the hybrid hydraulic powertrain and energy is transferred from the engine to the drive wheels through fluid power."

The series hybrid allows the engine, mated to a continuously variable transmission (CVT) to operate at optimum efficiency, while "energy is transferred from the engine to the drive wheels through fluid power." This system also uses regenerative braking and managed engine cut-off to show fuel efficiency improvements of 50-70%. Would you feel better if you had more energy? Try FRS® Healthy Energy™ Free*!


Although these systems are not in full production, they are the leading edge in hybrid technology for heavy vehicles. Think about these hybrid systems when you see a city bus or garbage truck accelerate from a stop. Imagine seeing that same bus accelerate, but without that black cloud. That is progress.

Another Look at Hybrids

With gas below $4, and in some states below $2, I thought I would take another look at hybrids and their economic efficiency.

While I am not against hybrids per se, I still am not completely convinced that the value proposition is there.

In my previous column about hybrids titled "Hybrids, the Real Deal or Flavor of the Month" and "Hybrid Hummer Hums," I made a general statement about how to determine if the fuel savings of the hybrid is greater than the additional acquisition cost. Also, I recommended using the MPG calculator at http://www.fueleconomy.gov/feg/savemoney.shtml.

I decided to compare the Toyota Camry and Toyota Camry Hybrid. Here is a table I created using data from an auto buying service. The data surprised me.

2009 Toyota Camry 4dr Sdn V6 Auto XLE (Natl) vs. 2009 Toyota Camry Hybrid 4dr Sdn (Natl)

As configured, the MSRP is $2545.00 greater ($28695.00 vs $26150.00).
Engine Type 6 cylinders standard, versus 4 cylinders standard.
Fuel Economy City 14 mpg lower fuel economy in the city (19 versus 33).
Fuel Economy Highway 6 mpg lower fuel economy on the highway (28 versus 34).
Cruising Range City 216.1 less miles cruising range in the city (351.5 vs 567.6).
Cruising Range Highway 67 less miles cruising on the highway (518 vs 584.8).
Base Curb Weight 164 pound(s) less base curb weight (3516 vs 3680).

What does all of this mean? I couldn't believe that the non-hybrid was $2545 more than the hybrid. But the story doesn't end there.

In a recent article in The Wall Street Journal about small cars, the Journal reports that hybrids are more expensive to own. To me, that didn't seem possible until I read the article.

Insurance for hybrids is more expensive, as are repair parts and labor. "The 2009 Camry hybrid, for instance, costs an average $1,957 to insure for that 40-year-old male driver, while a similar conventional 2009 Camry costs just $1,302, according to Insure.com."

Also from the Journal, "Hybrid cars cost more to insure because they can't [always] use after-market parts, the labor charges per hour are higher, and the they take longer to repair," says Amy Danise, a spokeswoman for Insure.com.

Just when I thought I might buy a hybrid during the gas run up, I am glad I didn't. I had no idea about the insurance issue, but that is why I wrote this article.

I wanted to highlight the need for a smart consumer to perform comparisons based on all of the facts. Many people have bought hybrids to be "eco-chic" or some other non-measurable quality. Others only view the gas savings, but don't know about the insurance hit.

Ultimately, since its your money, you will decide the relative value of each option, but please, do so in an informed manner.

Hybrids, the Real Deal or Flavor of the Month?

Gas is about $4.00 a gallon where I live, almost twice what it was a year ago. So what? If you are considering a hybrid, it is a pretty big so what. When I was considering the costs and benefits of hybrids a year ago, I came to the reasoned conclusion that there was little economic benefit to be had. The clear reason was that cost savings from using less fuel didn't cover the acquisition cost. Most hybrids tend to several thousand dollars more than their non-hybrid siblings.

The US government, as well as many state governments, decided they should lavish hybrid owners and manufacturers with tax payer money (a.k.a. subsidies), as well as certain privileges, such as driving in HOV lanes without other passengers. They did this to encourage the technology, ostensibly to reduce emissions as well as dependence on foreign oil. Arguably, those may be noble goals, but the number of potential vehicles wouldn't make a dent in either of the issues. ULEV (Ultra-low Emission Vehicles) are able to reduce vehicle emissions without having to worry about recycling or producing expensive battery packs needed for hybrids. Additionally, there are several models of inexpensive gasoline-powered cars that get similar mileage for less money, not to mention diesel-powered vehicles.

Back to the question at hand, will a hybrid save its owner enough money to justify the premium price? The answer is found by using a simple formula. Take the fuel economy of a non-hybrid and multiply by the average number of miles per tank to get price per mile. Do the same thing with the hybrid. Subtract the two results. Take the difference and multiply by tanks per year. So, if one saves $500 a year, and its a 5 year loan, the owner saves $2500 over the life of the car. Is that amount greater than or less than the premium to by the hybrid? That answer will determine generally whether owning a hybrid makes sense from an economic point of view. $4.00 gasoline has really changed the outcome of that equation, making them more attractive. I tell you what I am waiting for though, hydraulic diesel hybrids, as they don't require batteries to store power. UPS is running a pilot now. Details can be found here.

Don't forget to use the MPG calculator at http://www.fueleconomy.gov/feg/savemoney.shtml

Dollars and Sense Topics for Discussion

The list of topics to be analyzed has grown! The new ones are in red:

1. Using Corn and Sugar Cane to Create Ethanol Fuel
2. Carbon Offsets
3. Gasoline Hybrids
4. Solar
5. Reformulated Gasoline
6. Nuclear Power

In each of the above cases, without a government subsidy, these very popular topics may be economically inefficient and not born out by the market.