Seemless Shifting Transmission

[dirtrider]

New seemless shifting transmission on it’s way to motorcycle usage. Looks like Honda is already playing with it for Moto GP. Auto companies have been testing the basic idea for a while now.

 

Zero Shift Trans Link

[Cleatus]

I think the new Honda VFR 1200 has a dual clutch shift system. I've read good things about it, as far as operation and smoothness. I also read that BMW may be going to a wet, multi-plate clutch on some future boxer engines. A DCT system would not be too far from there, maybe.

[SuperG]

Sounds great I would love to see it on a motorcycle.

 

It sound much like VW/audi/porse dual gearbox or DSG trans where 1-2-3 on one side and 2-4-6 on the other side on different shaft with different clutches. It is manual gearbox with hydro electric actuator and wet clutches.

Computer pre-selects the next gear ( based on speed accel or decel) and waiting with clutch ready to engage while the previous gear/clutch disengage. DSG is one of the fastest shifting trans.

My wife's VW jetta has it and it is KING>. It keeps the diesel in peak torque and it hauls but.

 

The same thing could be done on the bike, it would be super.

I would buy two

[EffBee]

Reading through the explanation, there are several similarities between the ZeroShift and the old Husqvarna four-speed automatic, circa 1975. The use of concentric shafts and gears on the "overrun" being among them. However, whereas Husky used dogbones between the concentric shafts to lock the higher (lower numerically) driven gear and its shaft to the engine-driven shaft, ZeroShift is using more conventional shift drum and side engagement dogs. And while the Husky would shift itself when RPM limits would back off the pressure on the dogbones allowing the next gear to "engage" and put the previous gear on overrun, the ZeroShift still relies on physical input.

 

Old idea. Much more modern execution.

[UberXY]

The Porsche PDK is brilliant and I hope BMW adopts this soon for the bikes.

 

BTW, look up preselect transmission on wiki. It's been around forever but now it's electronic.

[hANNAbONE]

...sEAMLESS sHIFTING - EH??...

 

try shifting my Yammy Supa10 - purty seamless

[Little_Brit]

I love this technology stuff!

 

It's very difficult/impossible to explain in words how this cunning system works but the animations here http://www.zeroshift.com/transmission-technology/animation.html

help, a bit.

 

Don't confuse the VW and Porche PDK twin clutch sytems with this Zeroshift system. The Zeroshift system has been devised specifically because first F1 and then MotoGP banned twin clutch systems before they were actually introduced by any teams.

 

Ironically this may have lead Zeroshift and other F1 gearbox designers into coming up with a simpler, lighter gearbox that may be able to challenge the twin clutch system for automatic transmissions in both cars and motorcycles.

 

 

 

 

[outpost22]

Reading through the explanation, there are several similarities between the ZeroShift and the old Husqvarna four-speed automatic, circa 1975.

 

Well I certainly hope the new one is a heck of a lot more reliable than that one was. 2 friends of mine had them. Trail side repairs/tows were very common place.

[dazzz]

Yes, trail side repairs were commmon!

[EffBee]

Reading through the explanation, there are several similarities between the ZeroShift and the old Husqvarna four-speed automatic, circa 1975.

 

Well I certainly hope the new one is a heck of a lot more reliable than that one was. 2 friends of mine had them. Trail side repairs/tows were very common place.

 

Yupper. And Ford was producing this:

 

 

Times change.