A hydraulic KERS system?

[xpensive]

Variable displacement hydraulic pump/motors is nothing unique per se Carlos, they come in many different shapes,
only this "Hydristor" seems particularily compact, although somewhat complex perhaps.

[Carlos]

Nothing new under the sun but I definitely don't think this model is what we are looking for

[xpensive]

Don't knock the value of manual work, ask the driver to pump up 400 kJ on the straight perhaps?

Seriously, compactness must be the main issue here, if the "hydristor" became the preferred hydraulic solution?

[xpensive]

It seems to me that perhaps a pneumatic system would have some advantages?

In theory yes, but the scary part is to have air compressed to a hundred atmospheres on board a vehicle.

But there is the following being developed, in France of course:

http://www.aircarcompressedairtechnolog ... ne-eng.php

[mike]

Mike - you mean using a flywheel (15kg?) to avoid using a large volume, heavy, high pressure accumulator tank?

5kg flywheel(flybrid system) will do the job, probly with a few kgs on the casting... etc. If water alone is going to be 10kgs and 10L in volume, flywheel is clearly a better option to store the energy, difficult thing will be to get the hydristor to spin at 10x the rpm that its designed to do. it will probly be a 1:10 gear at the end of the 2 hydristors.

[Scania]

yeah xpensive - It's a kind of pump/mptor/transmision:
Ciro introduced the subject prompting the inventor to join the forum and talk about the hydristor at length. I researched a link to Racecar Engineering that had a 2 page article on a hydrostatic FSAE design study. Diagrams,references, links, the inventor stops in to write 1000+ word on the device. Thats a good read.
viewtopic.php?f=4&t=3577&hilit=hydristor

Racecar Engineering Hydrostatic FSAE Study - 2 pages
http://www.racecar-engineering.com/arti ... racer.html


Mike - you mean using a flywheel (15kg?) to avoid using a large volume, heavy, high pressure accumulator tank?

Maybe our Moderator; Ciro could facilitate this added discussion by combining the treads. I'll send him a PM

as I know, FSAE is not allow energy store system.....