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DrSmile
11-30-2005, 02:40 PM
I saw this in a car mag, it's an improvement on a dogbox, I think it may kick the crap out of the DSG.

http://www.zeroshift.com/

The animation shows the pucks (they call them bullets), unlike a dogbox only one face is undercut.
puremx69
11-30-2005, 03:26 PM
Sick :shock:
gtluke
11-30-2005, 11:46 PM
this was in a debate in some racing class wasn't it? f1?
puremx69
12-01-2005, 01:52 AM
yeah I think one of the articles said that they had a minimum size working prototype for f1 cars
TurboMike
12-01-2005, 02:14 AM
Get one for the Evo! Whoot!
Phreak
12-01-2005, 02:22 PM
So basically you only use the clutch for a stop to first, then just bang thru the gears w/o letting off the gas or touching the clutch?
gtluke
12-01-2005, 10:50 PM
So basically you only use the clutch for a stop to first, then just bang thru the gears w/o letting off the gas or touching the clutch?

thats how you drive an 18 wheeler, but you let off the gas.
thats also how i drive my galant when i'm too lazy to push down the clutch.
DrSmile
12-02-2005, 10:42 AM
I think you can put all the bullets in a neutral position, or add a "zero" gear that's not connected to the output shaft, so there is no need for a clutch at all. Eliminating the clutch is a key benefit. Basically you'd bang it into first gear and the car would start moving. The jerkiness of doing that is definitely an issue they have to resolve.
gtluke
12-02-2005, 10:47 AM
there is no resolution, the planetary transmissions have been able to do this for decades. just add a clutch or torque converter.
DrSmile
12-02-2005, 11:25 AM
Well, since the mechanism would only be used for starts and stops, I'd think something like a viscous coupling / torque converter would work and wouldn't have to be very big as long as it locks up 100% once moving. They have been working on this for over 2 years so there are obviously issues...
gtluke
12-02-2005, 06:07 PM
well this has always been an issue. there is no such thing as a clutchless transmission. there are automatics that use a clutch, a standard shift that uses a converter, cars WITHOUT transmissions with clutches... but there is no way to start a stop a car that has a running motor without some sort of variable grip.
helite99
12-02-2005, 07:04 PM
gimme 2 weeks ill blow it apart