Japanese watercar

[hartiberlin]

Hi,
this was already mentioned in another thread,but as I have not yet seen
any english or German translation of the video narration,
please could somebody who understand japanese language give
us some explanation what was said over here ?

http://uk.youtube.com/watch?v=E1OWDcWoXHs

Many thanks.

Regards, Stefan.

[readyakira]

http://www.haw-system.jp/English/indexE.html seems to show the english version.

[Farrah Day]

This is very interesting, though it's not hydrogen on demand.

Here they are using a tank of compressed hydrogen and adding water along with the hydrogen directly into the combustion chamber.

However, this method does show you the virtues of water vapour going into the combustion chamber along with the H2 and O2 from standards high current electrolysers that heat up the water and/or pass through bubblers. 

In the past, some people have tried very hard to stop this water vapour going into the engine for fear of rusting it up, but this now clearly indicates that the water vapour can enhance performance.

[hartiberlin]

Yes very interesting, although it was not shown, if they really use additionally stored hydrogen from a compressed tank or if they additionally just generate the used hydrogen from the water via electrolysis...
Maybe the english translation was just too sloopy or incorrect.
At least they did only show, that the car was only filled up with water and nothing else... so they did not show any compressed hydrogen gas in a bottle...

[Rosphere]

I asked a friend of mine to have a look at this video.  He is an engineer and he speaks both Japanese and English fluently.  He had this to say:

OK.  I watched it.  It uses compressed hydrogen and when hydrogen is ignited, water mist is injected into the combustion chamber.  The water vapor expands with the heat of burning hydrogen and pushes the piston.  Exhaust is mainly steam and no CO2 at all.

The vehicle has given a permission by something similar to DOT to be operated on public streets.  It'll be tested for the next two years and the concept will be evaluated.  Development of entire system (i.e., passive and active safety mechanism for hydrogen engine) will be taking place upon successful completion of the evaluation.