tegwin
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| posted on 23/12/07 at 10:49 AM |
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Electronic gear shift in a CEC?
Was lying in bed thismorning building my dream car in my head...(as you do!)...
And I was wondering.....assuming that on a transverse engine to change gear you simply have to pull the gear selector rod in and out of the box the
correct amount to get each gear...
Would it theoretically be possible to use an electronic system perhaps using Pneumatics and microswitches to have an electronicly controled gear
change using paddles on the dashboard?
I can easily design the electronics/mechanicals of the system, im just wondering if I might run into any problems etc?
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snapper
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| posted on 23/12/07 at 10:51 AM |
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search for Trickshifter.
See here, i'v done it for you.
Trickshifter, will keep looking as i have seen it someware
OOps this is clutchless manual shift system
Found it HERE
[Edited on 23/12/07 by snapper]
[Edited on 23/12/07 by snapper]
[Edited on 23/12/07 by snapper]
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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Aico
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| posted on 23/12/07 at 10:57 AM |
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You still need to use the clutch.
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tegwin
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| posted on 23/12/07 at 10:58 AM |
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Yup, I know I will still need to use the clutch...
The electronic system was just a way of removing the need for a complex rod linkage type gear system....With the engine in the middle, making a decent
rod gearchange system seems tricky..
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snapper
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| posted on 23/12/07 at 11:01 AM |
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Not with the second link and the trick shift electronics.
Have seen some fully electronic ones in some of the kit car mags recently.
Now if you linked that in to the shift light system with a rev attenuator for the first couple of gears you could make a drag race auto max revs
gearshift system.
Just plant your foot and go.
[Edited on 23/12/07 by snapper]
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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snapper
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| posted on 23/12/07 at 11:06 AM |
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Demont Tweeks if your pocket is deep enough
Omex
[Edited on 23/12/07 by snapper]
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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mark chandler
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| posted on 23/12/07 at 11:21 AM |
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Bowden cables for the gear shift, save yourself a fortune.
Regards Mark
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MikeRJ
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| posted on 23/12/07 at 11:43 AM |
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quote:
Originally posted by mark chandler
Bowden cables for the gear shift, save yourself a fortune.
Regards Mark
With the bonus that you can actually feel the gear change. A hydraulic/pneumatic/electric system will just push the gear lever with no mechanical
sympathy, which will end in tears if the box doesn't want to go into gear for whatever reason.
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Mr Whippy
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| posted on 23/12/07 at 12:28 PM |
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I've been spending quite a bit of time on this problem. I've been looking at miniature hydraulic cylinders to move the lever. A very simple
diagram below -
you can see that any movement at the shifter will be replicated at the gearbox, including the 'feel' of changing gear. Due to the strength
of the hydraulic systems very small cylinders could be used.
[Edited on 23/12/07 by Mr Whippy]
 
Rescued attachment untitled.JPG
Fame is when your old car is plastered all over the internet
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MikeRJ
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| posted on 23/12/07 at 02:54 PM |
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If using single acting rather than double acting, you'd have to be careful to size the cylinders to ensure you don't start creating vacuum
pockets etc.
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Mr Whippy
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| posted on 23/12/07 at 03:58 PM |
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yeah don't take the diagram to literally, I knocked it together so I didn't have to type so much 
Double acting of course and you'll note the pipes are on the wrong ends, but you get the general idea...
Fame is when your old car is plastered all over the internet
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