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Again, it does not involve the use of a clutch. DSG - Direct Shift Gearbox, this type of gearbox is the most advanced when compared to the above two transmissions. This gearbox is a dual-clutch transmission; although it does not have a clutch pedal for you to use. It will automatically pre-select the next gear in wait for the gear shift command depending on the driving environment. It is hence the quickest when it comes to shifting from one gear to the next. The reliability of all three transmissions are directly related to the wear and tear, the AMT still uses the clutch mechanism while the CVT does not use a clutch at all.
DSG transmissions on the other hand requires a dual clutch mechanism to engage a gear, therefore wearing out the most. CVT is therefore the most probable gearbox in terms of reliability when it comes to daily commuting which will include traffic and a lot of 'stop and go' driving conditions.
This type of gearbox uses a single speed transmission. The AMT gearbox is reliable too, it is as good as a manual gearbox of a particular model, it just removes the hassle of manual use of the clutch through a pedal.
The most important aspect of an AMT is that it is cost effective and it allows one to experience an automatic gearbox in your first car. As for the DSG, it is reliable when it comes to sports cars, and high-performance driving. Get the Best Drivespark Stories. No idea? Without probably noticing it, was a year that had a huge impact on the current automotive industry. Looking back in the history books shows that Tesla was founded that year, the new generation Toyota Prius was unveiled and the Volkswagen Group suddenly came up with a completely new gearbox that was used in the Volkswagen Golf R the "Direktschaltgetriebe", better known as the DSG.
A few years later, we can no longer ignore these three cars and automotive developments which have all became a sales success. But how does this system actually work and what are the differences between these gearboxes? You can read that in this article! The DSG automatic gearbox, which is also known as the Direkt Schalt Getriebe or Direct Shift Gearbox, is a dual-clutch gearbox with two primary shafts, one operating the even gears and the other operating the odd gears.
Despite BorgWarner developing the system on behalf of Volkswagen, this was not the first attempt at a dual-clutch automatic gearbox. Just as many innovations in the car industry can be traced back to motorsport, this is also the case here.
In the s, the Porsche already used a dual-clutch automatic gearbox. When shifting to the next gear, the gear is switched from one prize axis to another, with the next gear already engaged on the corresponding output main axis.
When shifting, the clutch is disengaged from the "old" gear in a smooth motion and the clutch is coupled from the "new" gear in a smooth motion, so there is an overlap in the drive due to both gears. In addition, the engine torque is slightly lowered when shifting up, while the motor torque is increased slightly when shifting down. This ensures fast and smooth shifting action without noticeable interruption in the drive. In addition, Volkswagen claims that the DSG also provides up to 20 percent fuel savings compared to the "standard" automatic gearbox with hydraulic torque converter!
The operation of the DSG in many ways is quite similar to that of a traditional manual gearbox and can therefore be described as a double-executed conventional gearbox. The big difference with a standard gearbox is of course that the DSG is electronically controlled. Despite the fact that various technical improvements have been applied to both gearboxes over the years, the basic principles remain the same.
Mechanically, the DSG6 gearbox can be described as a manual gearbox with two wet multi-plate clutches, two primary input, primary axles and two output secondary axles. An electronically controlled hydraulic control mechatronic ensures that the gearbox can operate fully automatically. As an option, an additional manual switching option can be selected Tiptronic. A two-mass flywheel connects the engine's crankshaft to the two clutch housings that rotate together in line with the crankshaft.
The two inner carriers rotate independently on the same axis and each drive their prize axis via a fixed connection.
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