Most of the cars right now that are sold in the Indian market do get the option of an automatic gearbox. But the choice is not only between an automatic and a manual gearbox. Even in an auto gearbox there are different types of gear systems such as an AMT, torque converter, CVT, AT and DCT that are available right now in different cars and in different price points. We help you choose the right type of gearbox according to your priority.
- The DCT is controlled with a high-performance, 32-bit transmission control unit. All systems - including hardware to control systems and software - were internally developed for.
- The new seven-speed automatic gearbox (DCT) takes the best of manual and automatic transmissions and combines them to deliver faster gear changes. Update: first Kia to be available with new 7-speed DCT is the 2016 Optima LX 1,6T.
- The 8DCL900 is a two-shaft dual-clutch transmission for longitudinal installation with front or mid-mounted engines. It is designed for an input torque of 900 Nm and engine speeds of up to 10,000 rpm. With a view to further future applications, the 8DCL900 also offers flexible possibilities for use in electrified sports vehicles.
AMT gearbox
This is an automated manual transmission. It is a kind of manual gearbox mechanically although it has a system that changes the gears for you. The gear shifts are jerky and not at all instantaneous. But you do get the comfort of now having to continuously shift gears in traffic. The biggest advantage is that these gearboxes are not that much more expensive than the manual ones and they also give better mileage than the torque converters. This is basically somewhere in between manuals and automatics and can be called as a budget automatic.
What is the 7-speed M Double-Clutch Transmission (DCT)? The 7-Speed M BMW Double-Clutch Transmission (DCT) was first introduced on November 1st, 2008 by BMW M Gmbh. BMW was the world’s first car maker to propose the 7-Speed DCT gearbox for the M division. It ensures optimal gearshift, provides more dynamic acceleration and reduces fuel.
CVT
This system is a continuously variable transmission.It has a sort of a rubber band effect and basically feels like one gear itself when you drive the car. The gearbox is linear and you do get the advantage of fuel efficiency in this kind of gearbox but the shifts are a bit laggy. This could be a problem for enthusiasts as it is not very quick in terms of gear shifting. For city traffic, this would be a very good gearbox as it is very smooth. The mileage of this kind of gearbox is a very big strong point.
AT
This is the said normal kind of gearbox known as a torque converter which is seen on most automatic cars. The gear shifts are relatively smoother but it does miss out on a bit of performance from the petrol if compared to a manual or a DCT. The disadvantage of this gearbox is that it does take a toll on fuel efficiency and there is a significant difference which can be seen in terms of mileage. It is not as laggy as a CVT and therefore can be driven in a dynamic way as well.
DCT
This is currently the best kind of gearbox that is available. The gear shifts are very smooth and very quick as well. The most important thing is that the car can quickly change gears and give in to your demand of instant power which is often not met with automatic gearboxes. Basically, this kind of a gearbox uses two clutches; one for the even gears and one for the odd, and therefore the clutch is continuously engaged so that there will not be any kind of delay when it comes to the shifting of the gears.
Also Read: Tata Harrier Petrol is coming
Pricing
N54 Dct Gearbox
Now, it is important to not that although you can differentiate gearboxes in these terms, but all manufacturers calibrate their gearboxes differently and two different cars having the same power and same kind of gearbox can feel different in terms of driving. Also the weight of all the gearboxes will be significantly heavier than the manual except the AMT. Usually in cars around the 10 lakh range the AMT costs about 50,000-70,000 more expensive than the manual variant. The torque converter cost about 1-1.5 lakh more than the manual and the DCT and CVT cost about 1.5 lakh rupees more. For reference, you can also check the new Volkswagen Vento that had a DSG gearbox which is essentially a DCT gearbox and in the new model it will get a torque converter.
Kia gave a little glimpse into the near future when they showed off their new 7-speed dual-clutch transmission (DCT) at the Geneva Motor Show.
This new state-of-the-art automatic transmission is a first for Kia, as they look to deliver improved fuel efficiency, improved performance, and a sportier driving feel to their vehicles.
Hyundai Dct Gearbox Review
The idea is to use this transmission to replace the existing 6-speed automatic that is delivered as an option on a number of different Kia models.
The new seven-speed automatic gearbox (DCT) takes the best of manual and automatic transmissions and combines them to deliver faster gear changes.
Update: first Kia to be available with new 7-speed DCT is the 2016 Optima LX 1,6T.
Improved Performance And Fuel Efficiency
The goal of the engineers as they designed the transmission was to deliver a 7% increase in fuel efficiency and a 5% improvement in acceleration over the existing 6-speed automatic transmission.
Kia’s research and developmnet team has also been focusing on NVH through the development process. The use of an external damper means that the new automatic gearbox is a lot more refined.
A pair of dry clutches are used in the DCT, each of which has an electric motor-driven clutch actuator to help improve fuel efficiency. There are also two gear input shafts used in the odd and even gear ratios.
This set-up means that the DCT is able to immediately jump to any of its seven gears, or be able to do it sequentially, depending on what the driver needs at any given time.
Rexnord Gearbox Parts Manual
The automaker’s new DCT unit is able to minimize the amount of torque lost during shifting by employing continuous power delivery, which also helps make each gear change incredibly smooth.
Dct Gearbox Oil
The 7-speed transmission offers wider ratio coverage than the 6-speed alternative, which in turn results in a much improved fuel efficiency rating.
Automatic Dct Transmission
Kia has penciled in 2015 as the year in which this transmission will start appearing in their cars.