sequential gearboxes

[Pat Ford]

On Mon, 12 Apr 1999, g8stw wrote:

> 
> I have done some preliminary work on this, there are two possible ways, a)
> using Hydraulics and b) using pneumatics.
> Pneumatics being cheaper and possibly faster you also need a
> micro-controller and some position sensors.

their should be a mechanical solution like motor bikes use. picture a 
cyclinder with groves if you lose the gear shift lever so the shift rails
are available. for each gear, you make each of the 3 rails go to a given 
position eg on my landrover

f= towards the front
r= towards the rear
n= in the middle

rail ( L to R ) Rev, 3-4 and 1-2

1st              n     n       r
2nd              n     n       f
3rd              n     r       n
4th              n     f       n
rev              f     n       n

it shouldn't be hard to make this chart into a pattern of groves so when 
the cyl. rotate the rails are pushed in or pulled out.

if the trany has shilt levers I think hurst used to have a linear shifter

> 
> If you want to discuss this further you can email direct if you wish.
> 
> John
> 
> john at g8stw.demon.co.uk
> 
> 
> >
> > I know this is not fuel injection but thought maybe
> > someone would have some info.
> >
> > How does a sequential gearbox change work and could it
> > be possible to convert a gated box ie H pattern to a
> > sequential change.
> >
> >               Thanks Roy
> 
> 

Pat Ford                           email: pford at qnx.com
QNX Software Systems, Ltd.           WWW: http://www.qnx.com
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