[Mgs] wanted - now DSG 7 speed

[Hans Duinhoven]

I never studied the DSG principles, but 
http://en.wikipedia.org/wiki/Direct-Shift_Gearbox gives a nice explanation. 
BTW Audi calls this gearbox Tip-Tronic


Cheers,

Hans
----- Original Message ----- 
From: "Charley & Peggy Robinson" <ccrobins at ktc.com>
To: "Paul Hunt" <paul.hunt1 at blueyonder.co.uk>
Cc: "Hans Duinhoven" <h.duinhoven at planet.nl>; <mgs at Autox.Team.Net>
Sent: Saturday, January 30, 2010 10:28 PM
Subject: Re: [Mgs] wanted - now DSG 7 speed


> The Prius will sort of freewheel with the engine shut down at speed below 
> ~40 mph.  It's called "gliding" by those who know how to extract this 
> behavior from the car.  It isn't really freewheeling, it's a matter of MG1 
> spinning at a speed that allows the engine to cease rotation - possible in 
> a 3-way planetary gearset.
>
> Have you read up on how the DSG gearbox(s) work?
>
>   CR
>
> On 1/30/2010 10:31 AM, Paul Hunt wrote:
>> Interesting if the designers have decided to freewheel and keep the 
>> engine ticking over rather than keep the momentum of the car spinning the 
>> engine and shut off the fuel completely, it implies the former is more 
>> economical. Mind you if you have stop/start then it could do both i.e. 
>> use no fuel *and* have minimum drag.  The computer restarting the engine 
>> and matching revs to road speed as well as engaging the appropriate gear 
>> and clutch.
>>
>> PaulH.
>>
>> ----- Original Message -----
>>> ... This gearbox gets into a "free" coasting state whenever the speed is 
>>> over 20 Km/h or higher and the throttle pedal is fully released.
>>> But whenever I apply the brakepedal, the DG box immediately engages the 
>>> right gearnumber for the current speed.
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