Throttle-by-Wire

[Shirley, Mark R]

Listen to this guy and take it to heart.  We played with some
of this stuff at work and in a professional environment, we still
had some problems.  Jaguars had triple redundant systems for a while,
now the established OEMS are settling down to double redundant.
If you do this and something goes wrong, you could kill someone and
they would very likely sue you and your family for everything you (used to)
own.

> -----Original Message-----
> From: Phil Hunter [mailto:ilphayunterhay at yahoo.com]
> Sent: Saturday, January 19, 2002 12:18 PM
> To: diy_efi at diy-efi.org
> Subject: Re: Throttle-by-Wire
> 
> 
> >Does Ford put TBW on any of it's vehicles or is
> >there any vehicle that i could pull a TBW off of
> >in the junkyard to retrofit to a project?
> 
> Don't even think about it! It's my STRONG opinion that TBW is
> strickly "off limits" for DIYers. Too many things can happen
> that you hadn't thought of, w/ serious consequences.
> 
> Control loops can be tricky, not even rocket scientists always
> get it right. Check out all the problems the Formula 1 teams had
> last year w/ traction control, all the money & talent they threw
> at the problem, many didn't get it right. Do you know what PID
> stands for and what's use? Good at calculus? 
> 
> If you really want to "cut your teeth" on TBW, consider doing
> a governor for something like an AC generator, just keeping a
> constant RPM w/ a variable load will be quite an education.
> 
> And if you insist on doing TBW for a vehicle, better have a
> couple of redundant kill mechanisims such as a thumb button
> for the driver that "latches" on and removes power from the
> fuel injectors, a second throttle butterfly to cut air flow,
> etc.
> 
> TBW holds a lot of promise, but leave it to the OEMs, DIYers
> are not qualified, not even to retrofit an OEM device.
> 
> regards,
> philh
> (digest)
> 
> 
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