Peugeot gearshift system

[evo]

Hi. I'm wondering if anyone here has any idea where I can find information on how the two-ring push/pull gearshift mechanism in the 206 WRC works. I was thinking about replicating something like that for a Formula SAE car. Any help is greatly appreciated. Thanks a lot.

[SJ Spode]

I've copied this to the Technology Forum as well.

[imull]

when they pull the ring up or push it down a circuit is created that sends an input to teh electronic acutator.

At the same time an impulse (in the Hayundai at least and i would guess the same for all) cuts the power from the engine (no spark) and actuates teh clutch.

Once this has happened teh actuator moves and causes the gear change.

It is as simple as that though the entire shift process can take as little as 0.15 seconds.

If you watch the Citroens you can see teh manual shift lever move at teh same time.

One F. Student car that I know of ran with cable attached to the ring and was still a mechanical shift.

[Speeddemon555]

Still have Hyundai, Skoda and Mitsubishi having the gearshift levers.

[imull]

I am not sure what the actual costs are but I think that Peugeot gearboxes are about twice as expensive as a hyundai one and XTrac can only charge so much for a few cogs.

All the current stick shift boxes still do the clutch and engine automatically as far as i know.

i think that there is quite a large technology leap to get the stearing mounted paddles to work properly. Ford spent the best part of a year testing theirs before putting it into full use (i am told). Skoda cant even get their diffs to work let alone worry about fancier gear shifts as well...

[evo]

Oh, I know how the shift system works, I'm just wondering how the switches work. I can't tell where the switches are located or how the two rings are held in the neutral position. I've been trying to find a schematic of the thing but no luck on that yet... :confused:

[avsfan733]

its basically a switch with three positions with momentary contatcs and probably a spring system as well to return it to its neutral

and to add to what was already said, the system doesn't cut the igniton in WRC cars it retards it to make the fuel burn in tha tailpipe and keep the turbo spooled up it only cuts it in F1/roadcars

[Speeddemon555]

Those systems are run by hydaulics. The Peugeot team had problems with the system due to lack of hydaulics in which the driver had to use the gear lever instead of the steering wheel.

[imull]

Thats the hydraulic actuators that actually moves teh gear linkage. The sensors on the wheel use switchs.

The stick shift system bypasses the need for hydraulic actuators.

At least thats how I understand it