Japanese watercar

[Farrah Day]

Yes, I thought so.

Effectively a steam engine.  This makes sense, because hydrogen by itself is too explosive as it has an extremely fast burn rate.  By itself, I would expect hydrogen to quickly damage an engine, even blow a piston.  Water will slow the burn time and absorb a lot of the energy from the ignited hydrogen turning to gaseous form and hence expanding as it does so.

This allows time for the piston to react and so creates far less stress on the engine.

There are things we should learn from this:

Pure hydrogen would quickly create a great amount of wear and tear on the engine. 
Water vapour going ito our engine along with H2 and O2 is not necessarily a bad thing.

[pese]

water to engine will increase the power up to 100 %

Pese

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read this:
Performance and Technical information on carburetor jetting for all motorcycles.
Jetting considerations for motor performance factors
How do weather factors like altitude, temperature and humidity effect the jetting of a carburetor? Here are some simple rules that can help you fine tune the jetting to get the best performance from your motorcycle.

ALTITUDE
As you increase your altitude the octane requirement decreases 1-2 octane per 3000 feet elevation. This is because the density of the air is reduced or there is less air available for your motor to burn. The higher the altitude, the richer your motor will run, making it necessary to re-jet the motor in order to lean it out. The fuel volume remains the same and the air volume goes down. If you have a vacuum advance, as the altitude increases, the motor makes less vacuum and the air fuel ratio becomes richer due to the decreasing air to fuel volume.

TEMPERATURE
When the temperature goes up, the air density decreases, thus you have less air available for combustion and your air fuel ratio becomes richer. The same works in reverse. As the temperature goes down, you end up with more air per cubic foot, and without re-jetting your carburetor, the engine will run leaner.

AIR DENSITY
As the air density increases, your engine will lean out. As the air density goes down, the engine runs richer. Like driving up a mountain, at the top, the motor has less power because you have less air to burn.

HUMIDITY
When the humidity increases, octane requirements ease. The formula is something like... for every one gram of water increase per one kilogram of dry air the octane decreases by .25 to .35. WWII aviation engines used water injection and it worked well for a short time by cooling the cylinder temperature. As temperature goes back the effect goes away.

The bottom line is to make sure to pay very close attention to your jetting on cold, dry days with low humidity and when at sea level.


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  Posted 30 December 2007 07:35 AM  Hide Post
Yes, double is pretty close to the measured gains in mileage experienced by my machinist buddy on the 2 or 3 cars he did vapour carbs on.

Two tips:

1. Use a propane regulator for safety so you don't blow yourself to bits

2. Water vapour (steam) aspirated into the air intake will slow down those hot little gas vapour explosions into a nice manageable push that will maintain longevity to your engine parts. My friend who has done extensive personal testing said that 5% steam (by volume) works fine. I'm not talking about occasionally adding steam to your air intake, I mean while running on vapour, also add steam.

He started up normally (old style carb), then when the engine got hot, he used the heat to gassify (boil) the gasoline, feeding it into the carb and then cutting off the flow of liquid. When shutting down, he'd switch back to liquid gas then cut off the steam from the air intake and drive a few minutes to clear the water out.

I accept no liability for death, personal injury, or mechanical dammage relating to or arising from the info I've related here. My machininst friend is a very smart, mechanically experienced guy and knew how to safely boil gasoline without endangering himself or anyone else. While I believe that gasoline vapour is a great thing, it is potentially dangerous. If you proceed, do so cautiously, and only after thorough research into handling explosive gasses and expansion of flammable liquids into explosive gasses.

I've heard that in WW2, in Africa, a bunch of feds in black suits showed up and installed vapour carbs into US Sherman tanks to help fight Rommel. After Germany surrendered, the suits returned and removed the carbs.

No, I don't wear aluminum foil in my hat
-----------------------
Wasser + Treibstoff  DEUTSCH

http://www.presstext.de/cms/index/opm/1412.html benzin wasser
http://www.uni-koeln.de/pi/i/2004.102.htm benzin + wasser = ergibt: mehr Energie
http://www.uni-protokolle.de/nachrichten/id/35893/ benzin wasser
http://www.innovations-report.de/html/bericht-30636.html benzin wasser
http://www.wtz.de/fuel-wat.htm

Versuch Benzin + 20 % Wasser.
Nissan Febr 2007.
Tankf?llung Benzin reicht 450km.
Mit 20 % Wasserzusatz wird die Reichweite  auf 700km erh?ht . D.h. fast doppelt da ja
Gesamtmischung nur 80% Benzin enth?lt

Video hierzu:

http://video.google.com/videoplay?docid=-7711785211600823269

[hartiberlin]

So we still do not know, if the hydrogen is produced on demand onboard just from the water or is carried within the car in pressurized bottles...

[Farrah Day]

It's not on-demand Harti.

It's compressed H2 in a gas cylinder most likely similar to LPG gas tanks - but stronger!

One of those stories that only tells half the tale, with the water side being hyped up to make it look amazing. Shame it didn't show the guy snorting H2 and adding that to the vehicle too!

[hartiberlin]

It's not on-demand Harti.

It's compressed H2 in a gas cylinder most likely similar to LPG gas tanks - but stronger!

Where do you know that from?
Are you just guessing it or please provide a reference.
Many thanks.