Trans trickery with Tadge
01-20-2019, 11:35 AM
#1
Pro
Thread Starter
Trans trickery with Tadge
METHOD OF CONTROLLING A TRANSMISSION TO SIMULATE CLUTCH PEDAL FUNCTIONALITY
Publication number: 20180156330
Abstract: A method of controlling a transmission includes initiating a temporary neutral mode of the transmission, in which at least one clutch of the transmission is disengaged to prevent power flow through the transmission, when an upshift paddle selector and a downshift paddle selector are both engaged within a pre-defined engagement time window. At least one of the upshift paddle selector and the downshift paddle selector is held in their respective engaged positions to maintain the temporary neutral mode of the transmission. The temporary neutral mode of the transmission is ended when both of the upshift paddle selector and the downshift paddle selector are disengaged, by re-engaging the at least one transmission clutch that was disengaged to initiate the temporary neutral mode.
Type: Application
Filed: December 1, 2016
Publication date: June 7, 2018
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventors: Orson S. ****, Tadge J. Juechter, Michael G. Petrucci, Mark A. Vernacchia
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NewYuriCity (01-21-2019)
01-20-2019, 11:41 AM
#2
Drifting
As I understand it, that sounds similar to how launch control might be implemented on a DCT.
01-20-2019, 12:36 PM
#5
Only in the M7.
Last edited by Foosh; 01-20-2019 at 01:00 PM.
01-21-2019, 03:31 PM
#6
This system wouldn't function the same way, but it'd be pretty cool to pull up to a stoplight, pull both paddles, floor the accelerator, and then let the last paddle out as the light turns green!
01-21-2019, 03:36 PM
#7
If the C8 uses a low speed TC in conjunction with a DCT, launch control functionality will be significantly different.
01-21-2019, 06:27 PM
#8
Safety Car
Many exotics are using this type of system system for DCT coasting capabilities. Perhaps the EPA fuel testing parameters allow, and then gives “bonus points” for coasting in the simulated test cycles, to either eliminate or reduce the amount of the fuel penalty charge.
Last edited by elegant; 01-21-2019 at 06:34 PM.
01-22-2019, 08:35 AM
#9
Melting Slicks
Yeah, sounds more like coasting to me than launch control. I would presume launch control would be more interested in ending the neutral cycle when the pedals hit a certain threshold, not by releasing a shift paddle.
08-28-2019, 11:25 AM
#10
The Porsche GT3 PDKs do the same thing...
Last edited by Kappa; 08-28-2019 at 11:26 AM.
08-29-2019, 09:48 AM
#11
Former Vendor
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St. Jude Donor '07-'08-'09-'10-'11-'12'-'13-'14-'15
I am not an expert on DCT, Hell I have never owned one or dealt with one. My question is regarding the 664ft lb TQ number listed in the first post. Does this mean the DCT can only hold around 664ft lb? Can you beef these up? What is cost to increase capability to 800whp or 1000whp?