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@ktc.com>
To: "Paul Hunt" <paul.hunt1@blueyonder.co.uk>
Cc: "Hans Duinhoven" <h.duinhoven@planet.nl>; <mgs@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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