[Brock]

First have a look at the diagram on this page. Click on the image with the arrows to enlarge it.

http://www.greencarcongress.com/2005/02 ... s_12_.html

There's devices being sold on the internet that claim to increase the miles per gallons of a normal vechile 15%-100%. If just 25% of that red on the diagram went to green it would be a 100% increase. People working on these devices have said "it burns the gas more fully and that is where the energy increase comes from" though I asked engine consultants about it and they said only 1% is lost due to fuel not being consumed, so it must be that these devices are making the engines run cooler.

The device is a hydrogen on demand system. It's just a container that fits under the hood and produces oxygen and hydrogen gas from water, and it's powerd with electricity from the battery. The battery is recharged by the altinator, so it's just a loop of energy, but here's the thing, more water is produced in the combustion chamber, and also there is more atomic instead of molecule reaction. I don't really know how that might make the engine run cooler, but it's something to check out.

I'm currently advertising a fund for investment money to further research this. I would buy/build and test one of these but I'm not going to have enough money until my stocks go up, or my job starts. If someone wants to buy me one I'll make video of it, and put it on the internet. They're selling for about $1000. If mass produced they should be only 1 or 2 hundred.(emachinshop.com)

Does anyone here have experience with these?

[yesplease]

It may increase efficiency slightly, but it's more about improving emissions AFAIK. There will be a much greater efficiency improvement by addressing gearing. Course, then acceleration is compromised proportionally in that gear, so it all depends on what the consumer wants. Peak BTE is somewhere around 40%.
$this->bbcode_second_pass_quote('Wikipedia', 'I')n 2003 Tsolakis et al. of the University of Birmingham showed that "partial replacement of the hydrocarbon fuel by hydrogen combined with EGR resulted in simultaneous reductions of smoke and nitrogen oxides emissions (NO,) without significant changes to engine efficiency".[2] Similar results have been presented by a team of scientists from Zhejiang University, China, which found that "a little amount of hydrogen supplemented to the gasoline-air mixture can extend the flammability of the mixture... improving the economy and emissions of engines".[3]

[Brock]

Thanks, this helps a lot.

But I think a 50%+ increase of efficiency is possible with a good system, one of the sellers garentee's a 50% increase if they install it, and many of the testimonials I've read have mostly 50% increases, these I find on forums so can't be 100% trusted. Thanks for that gear information. When oil becomes scarce they will probably do that first, to increase eff. How much this will take away from the hydrogen injectors eff. is the question. A 10% increase would still be worth it in a peak oil situation, as 10% will be more as the price increases.

There are many tests, and improvements going on with electricity to hydrogen and oxygen efficiency. Much at this forum http://www.overunity.com/index.php/board,8.0.html

[yesplease]

Heh, I really doubt you'll see a 50%+ increase in efficient w/ this. Maybe 10-15%? But if you wanna throw your money where ever, feel free. The 40% peak BTE I was talking about was the maximum possible for small ICEs, w/ ~20% being the average. Not an increase. That being said, most vehicles could see a 100% increase in efficiency during a steady cruise at some low end speed with the right OD gearing. Right now, most gearing results in peak efficiency at ~70-120mph, and top speeds well in excess of that. Course, the best way to increase mileage is to drive 55, however, ICE efficiency still isn't optimized at that speed, so a change in OD gearing is needed in order to maximize engine efficiency at those lower speeds.

[Brock]

how much does it cost to set the gearing that way? Do trucking companies change the gearing depending on their roots?

You need to back up that claim of only 15% is achievable. I've seen many testimonials from various sites. There is room for improvement in this technology, someone even increased the production using sound with an underwater microphone.

[BigTex]

I have seen a hydrogen injector bolt on device for diesel engines (I actually saw one on a big rig in a repair shop). The claimed mileage improvements were 5%-15%, I believe, which would easily make it a cost effective add-on (even at the $10,000 or so price tag). Sorry, I don't have a link to the manufacturer right now.

I'm not saying it can't be done, but improving the efficiency by 50% to 100% of a vehicle that has already had most of the obivous mileage improvement tweaks done by the manufacturer is hard to believe. If, however, I saw it, I would believe it, so I'm not saying it can't be done; I'm just saying I'm skeptical.

Regarding percentage mileage improvements generally, I have always thought it would be fun to add 25 mileage improvement devices to my car that each claimed a 4% mileage improvement and see how close I came to increasing my mileage by 100%.

[BigTex]

delete

[Brock]

Here's a manufaturer that garentee's a 10% mpg increase. Some of their testimonials claim over 40% increase.

http://www.chechfi.ca/sotesti.htm

[BigTex]

$this->bbcode_second_pass_quote('Brock', 'H')ere's a manufaturer that garentee's a 10% mpg increase. Some of their testimonials claim over 40% increase.

http://www.chechfi.ca/sotesti.htm

[yesplease]

$this->bbcode_second_pass_quote('Brock', 'h')ow much does it cost to set the gearing that way? Do trucking companies change the gearing depending on their roots?