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A system of brakes for cars which during strong brakes deflates the tires.

Slightly deflated tires have stronger grip on the ground (while consuming the rubber more). Would it then be a good idea to incorporate, as a security device in cars, besides airbags and the rest, also an electronically triggered valve, letting air escape during strong brakes?

I have no idea if this could realistically work.

One could also have a pump which would slowly bring the tire pressure back to normal after a false alarm.

  • Dec 29 2012: This sounds a little extreme,but I have had an airbag deflate in an accident. I support airbags.
    • Jan 6 2013: thanks for the reply, I was surely not in favor of eliminating airbags though! Sorry if I formulated it in a misleading way!
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    Dec 29 2012: There could be a problem with tubeless tires breaking the bead due to running on an essentially flat tire. If that happens, you're going to have a bad time.
    • Jan 6 2013: yeah, that would be a big trouble, taking away the "pro" of being usable over and over again. Still, completely depleting the tires seems excessive, I would rather go for a partial depletion which just gives more flatness without getting to a tubeless tire situation. Thanks for the reply!
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    Dec 29 2012: Your idea would realistically work, as you combined logically.

    If a regular valve gauge would be sufficient enough to release enough pressure in a split-second is questionable though. And if the advantage in 'meters' would be able to justify the extra cost had to be investigated.

    The 'fastest' pressure release would be against vacuum without the use of any pump, which, at the right setup, could reach supersonic 'speed', and this method is used in subsonic 'wind tunnel' experiments.

    On a tubeless tire, a vacuum-chamber could be integrated within the wheel rim, and opened by electrically triggered and 'internal' air-valves. Any 'false alarm' would therefore become a whole procedure to regain the vacuum, which by an 'on board' vacuum-pump would be way to expensive.

    Personally I was once thinking about a 'electro-viscous' tire composite, in which small cavities within the rubber of a tire were filled with a viscosity changing gel, which softens in an instance by shutting down an otherwise constantly feeding current to obtain a certain 'rigidness'. The combination of this gel and the geometry of those cavities and the overall tire profile, would then 'flatten' geometrically to increase the grip on the road. As the viscosity of this gel responds proportional to an electrical current, it could be adjusted automatically to any street and weather condition throughout all seasons of the year and in 'real time', triggered by an on-board computer...

    This idea I had before I came to work with the automotive industry and dismissed it once I came to learn that anything has to be 'as cheap as possible' and 'next year even cheaper' in this business ... And compared to a regular 'full-rubber' tire, this definitely would become a challenging task ... :o)

    Nevertheless, keep up having great ideas, as the one you just shared!
    • Jan 6 2013: Yeah, I see that it would take quite some effort (in terms of money) to make, so probably it would be relevant just in very specialized situations, which maybe don't exist yet (?)

      Also your idea is quite fun, do you know if this kind of gel is already available/used somewhere?? It sounds something that would help to create some kind of mechanic arm, where the grip is implemented through your gel.. I saw somewhere a video of a kind of arm like that but if I remember correctly that time it was implemented through a void/pump system.

      Thanks for the feedback ad keep the cool ideas up!