Hybrids without Batteries
The hybrid drivetrain has been the great success story of the high-mileage movement. Cars like the Prius get up to twice the mileage of the industry average partially by recovering energy that´s lost as heat during braking, storing that energy in a battery, and reusing it later on. Yet today´s most efficient hybrids can recover only 30 percent of that energy for reuse.
One radical solution under development at the Environmental Protection Agency´s Advanced Technology Division is to get rid of the heavy batteries altogether. The EPA has built a modified hybrid that uses a hydraulic system, not a battery, to store braking energy. When you press the brakes, the wheels drive a pump that compresses nitrogen gas, which is inexpensive and inert. When you accelerate again, that compressed gas runs the pump in reverse to help power the vehicle [see illustration, below].
The hydraulic-hybrid system, scheduled to begin testing in two UPS trucks this month, with another to follow next year, promises to return at least 70 percent of the braking energy back to the wheels, which would lead to a 60 to 70 percent jump in fuel economy and a 40 percent reduction in emissions. Perhaps that´s why Charles Gray, the director of the Advanced Technology Division and one of the developers of the hydraulic hybrid, can´t contain his excitement about its potential. "This is going to be the biggest revolution in automotive history," he declares. "Bigger than the assembly line."
That's yet to be seen, of course, but the hydraulic hybrid is also smaller and cheaper than conventional hybrids. "I can hold a 500-horsepower hydraulic pump motor in my hand, and I'm not a big guy," Gray says. Because the technology would eliminate the need for a transmission-the engine merely pressurizes the hydraulic system, while the hydraulic motors power the wheels-and several other parts, it could be installed in a small car for almost no additional cost. Ford, the U.S. Army and others are investigating the technology, yet UPS-with its fleet of vehicles that constantly suffer through stop-and-go driving-is its only committed customer so far.
Stay up to date on the latest news of the future of science and technology from your iPhone with full articles, images and offline viewing
Featuring every article from the magazine and website, plus links from around the Web. Also see our PopSci DIY feed
Share links with friends, comment on stories and more
In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.
Check out the best of what's new here.
The trick to fuel economy is the air to fuel ratio. Old style carburators were very effective at this, as they came in models from a single barrell fuel saver, to duel 4-barrells that could snap a driveshaft as soon as move the vehicle. The new ECU chips are nice, but they need to be used to their full advantage,and constantly tune themselves for the best fuel economy. Larger ranges on transmissions also help, if you can keep the RPM's low, then naturally you get better fuel mileage. When you go to putting out 200 horsepower and not needing but 50 to keep the truck moving, you're wasting gas. Auto makers need to rethink the whole point of chips, and develop a system to track and adjust the a/f ratio in addition to keeping your car at a perfect 70 degrees, giving you directions, and playin music at the sound of your voice.
or that other monthly, that offered instructions on converting a Pinto to a Diesel Centurion?
How fast does this car have to move? I have a bicycle that gets way more than 100 miles per gallon.
Number of units required, I'd have to check NASCAR Rules, but I recall a figure of 500.
Arawn
Do you hear what I hear, then you might be selling flowers too.
Gas companys have monopolized the energy industry. Did anybody know that the Model T got 20 mpg, and the Model A got 25-30. Look at all the advancements technology has made in other sectors and look at the car industry. Its because people want to make money and they dont care about anything else. The first electric car was made in the late 1880s, but many gas cars today cant get more than 30 mpg. I hope somebody sees the problem with this. If people can spread the word about this than something will get done.
It is true that auto manufacturers could do a lot better with current technology to produce an efficient car. The big problem is that too many Americans are sucked into the media hype that we "need" bigger SUV's, or faster sports cars. And these Americans spend a LOT of their income on these inefficient vehicles. Look at where all the money goes, and think about who drives the media.
The fact is that most Americans could get where they need to go without using ANY petroleum for 95% of their trips. When we begin walking or using a bicycle, it becomes obvious that these methods of transport are not only fun and functional, they also cost little or nothing, improve our health directly, and improve the environment by reducing our personal carbon footprint.
High fuel prices are GOOD! They are helping us to wake up and take responsibility for the unconscious or irresponsible decisions that we made in the past. More and more Americans are now making smarter choices - living closer to where they work, using mass transit, bicycling, walking, demanding more efficient vehicles, and making all sorts of good decisions that will ultimately leave this world in tact for generations to come.
First of all, high fuel prices are NOT good for society. I am in the trucking business and fuel prices are killing us and putting people out of business. This is a way of life for us. We deliver just about everything that you purchase. The thing that people do not understand in this country is that everytime fuel prices go up, so do your everyday items that are at your favorite store. Items such as groceries, clothing, etc. These items go up in price because the price to deliver them goes up. Normal everyday middle and lower class people have a hard time keeping up financially because of this. Second of all, the government would confiscate anything from anyone that would allow you to achieve 100 mpg. It has happened in the past with a specialized carb. , and believe me would happen again. Bottom line is that you are not going to take money away from the American governments pockets without a fight.
from Lexigton Park, Maryland
"The average price of a gallon of gas is higher than at any time since the early 1980s. "
I do NOT remember gasoline ever being over $3 per gallon!
Where, when was 'The average price of a gallon of gas ...higher ..in the early 1980s.?'
j.kuss
In the later part of the 90's i was buying fuel for 87 cents a gallon. The average price for a gallon of gas was NEVER higher at any time than it is now. Especially in the 80's. Some of you seem as irritated as myself with these outrageous prices. The U.S. should have started drilling off the coast of the communist state of California years ago. The same thing goes for Florida and Alaska. The people of California, and Florida do not want to look at oil rigs that are 10 miles off the coast. Wwwaaaahhhh!!! They would rather let someone like China come in and cross-drill and take the oil that is rightfully ours. We need to tell the tree huggers to chill for a while, and we need to start building new refinery's and drilling for our own oil. This country needs to become self contained so that we can take care of ourselves and not depend on these other countries. The greatest country in the world is using China as their lender. What a Joke! We need to stand up and become real Americans again. If we do not take care of our own first, we will continue to fall.
What most people don't seem to understand is a few things. The first is that by the 1980's comment includes there being inflation no just the cost of it. Second is that yes the government would take away any object that would do 100 miles per gallon and be able to sell because they get so much money off of the oil industry, and finally the main reason of the price being so high is not just the supply of oil it is also the stress on refineries and that no new ones are being built
The hydraulic hybrid is interesting. If the StarRotor idea works out is there any reason it wouldn't work StarRotor/Hydraulic hybrid?
from Ogdensburg, WI
The people in the U.S. are the most innovative and hardworking chaps in the world. Most of us are just too greedy and selfcentered to channel that energy. into somthing that might help us all. Most people are reactive instead of proactive. I thank the powers that be for the tool of the internet to combat this shameful state of denial most are living in. And Popular Science is the most proactive publication I have ever come accross. Maybe that is why I have subscribed since I was old enough to read.
Thanks for the theme dear
-----------------------
Download Free Software and Sharewares
أفضل المواقع العربية
دليل المواقع
Hi,
I found this article on a similar subject - interesting stuff! Looks like you can actually do this now, and it's legal. I don't know if it really works though.
Water Powered Car
Gary.