Dec 29 2013, 01:05 PM
QUOTE(kadajawi @ Dec 29 2013, 11:18 AM)
Ahem, no? DSG does disconnect when stopping, torque converters don't. At least those I drove. Not sure about CVT.
How can you wear out your brake pads when you are not moving? Say you put your hand on a table, and then pull it across the table. There is friction. Press down the hand and move with the same force... More friction. Press so hard that it can't move anymore... No friction. --> can't wear out. Only crawling with the brakes applied (but not to a full stop will wear out).
I usually disengage the gear while still rolling, and engage while rolling. I don't like the jerk when changing into D while standing (even with applied brakes). Getting to a full stop is also not that smooth with an auto gearbox. Not comfortable at all.
My next car will be manual again. There's no way I'll accept a car with automatic gearbox. So bloody troublesome, complicated and uncomfortable.
From what I know, DSG and CVT share the same concept which using clutch to connect to the engine shaft/flywheel. Car using CVT/DSG tends to rolling backwards (Unless there's 'Hill Assist' installed) even in a slight slope when in D mode while you release the brake. They are programmed to disengage the clutch when standstill and engage back when throttle applied. That's why these kind of transmission are also known as semi-auto.How can you wear out your brake pads when you are not moving? Say you put your hand on a table, and then pull it across the table. There is friction. Press down the hand and move with the same force... More friction. Press so hard that it can't move anymore... No friction. --> can't wear out. Only crawling with the brakes applied (but not to a full stop will wear out).
I usually disengage the gear while still rolling, and engage while rolling. I don't like the jerk when changing into D while standing (even with applied brakes). Getting to a full stop is also not that smooth with an auto gearbox. Not comfortable at all.
My next car will be manual again. There's no way I'll accept a car with automatic gearbox. So bloody troublesome, complicated and uncomfortable.
In torque converter transmission, it use fluid as a connector (fluid coupling). However, in some auto transmission, there are ' lockup clutch'. This 'lockup clutch' will bypass the torque converter but only at highest gear. In standstill (D mode), the fluid still flows through the 'turbine' wheel. in a simple words, the transmission 'always connected' in D mode and that's why there are no delays when you hit the acceleration pedal.
For me, personally I will switch to N mode when car is stationary more than 1 minutes. Too much switching will sure deteriorate moving parts especially in stop and go bumper to bumper crawling traffic jam. For CVT/DSG, as they share the same concept, I think the best answer is here :
Punch Powertrain : Proton CVT
Just share my opinion.
Correction : Some CVTs do use torque converter instead of wet clutch.
This post has been edited by gjoey: Dec 29 2013, 02:28 PM
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