Are all teams using double-clutch transmissions this season?

[wunderkind]

Hi all

Just wondering if all F1 teams are running double-clutch transmissions this season.

Thanks!

[Pierce89]

Double clutch 'boxes are illegal. They use a ratcheting pre-selection mechanism for seamless shift 'boxes

[wunderkind]

Thanks Pierce89

Hoe does the ratcheting pre-selection mechanism work? Also, with regards to a transmission having to last for four races in 2009, how did engineers optimise the gear ratios for four different tracks with different characteristics?

Cheers

[mike]

its not preselection is the ability to be in 2 gears at once.
http://www.zeroshift.com/

[autogyro]

its not preselection is the ability to be in 2 gears at once.
http://www.zeroshift.com/

Sorry Mike the Zero shift is simply a method to smooth out dog engagement for a layshaft gearbox, the technology of layshaft boxes is still 19th century, as is dog engagement. The pretty graphics do not change anything.
Most FI boxes use a computer ECU program to take of some torque during shifts.
Developments in this control now allow shift timing as fast as the contact between two gear teeth and the next two reducing torque hesitation to Milli seconds.
A layshaft gearbox has to include a gear pair between the input shaft and the layshaft and another gear pair back to the mainshaft. Also all the other gears in the box are engaged when not transferring torque. This is an ancient and very torque sapping design. Dual clutch/shaft gearboxes are far worse having an extra layshaft in effect. Most hybrid systems get even more complex and drag even more torque out of the drive train.
My Electronic Shift Energy Recovery System can be either a seven speed stepped ratio gearbox within F1 regulations. It can include an integral Kers/gearbox or a full hybrid system or full electric unit.
It has no need for a clutch of any sort and only engages the gears needed in each ratio. In direct top there are NO gears rotating in mesh at all either transferring torque or idling and there is only ONE support bearing.
Control is completely electrical with NO hydrolics or pneumatics.
Just needs a budget???

[autogyro]

its not preselection is the ability to be in 2 gears at once.
http://www.zeroshift.com/

Sorry again Mike but look at the zero shift again it is in no way a method of being in two gears at once.
Dual clutch/shaft gearboxes do this but at the cost of major torque loss and complexity.
As to the methods of selection. This can be hydraulic, pneumatic, mechanical or any combination to allow selected movement of conventional selector forks.
All are now operated by computer which can be switched by, flap levers, buttons fully automatically using sensor inputs, or even with that ancient method of waggling a banana in a bowl of custard (gear lever).
Sequential is a development of the motor cycle based system I suggested to Gary Anderson at Jordan's on their first cars that also established a maximum of seven ratios in the F1 regulations. This selection system was a ratchet type 1st through to top and back again with no intermediate shifts. the modern (still ancient) method uses a barrel which rotates and goes in and out moving various forks. Sequential is not really the correct description.

[xxChrisxx]

Thanks Pierce89

Hoe does the ratcheting pre-selection mechanism work? Also, with regards to a transmission having to last for four races in 2009, how did engineers optimise the gear ratios for four different tracks with different characteristics?

Cheers

They can change the gear ratios whilt not in parc ferme.

[Ciro Pabón]

Please, use the thread autogyro's Transmission Concept to continue that particular discussion.

Use this thread to explain how current F1 transmissions work or how many teams use double-clutch transmissions.