What are the advantages and disadvantages of automatic transmissions?
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- Time：2021-08-10
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[Summary]Nowadays, automatic transmission cars have become popular, but automatic transmission cars have many kinds of gearboxes, such as continuously variable transmission, automatic manual integration, dual clutch, etc.
What are the advantages and disadvantages of automatic transmissions?
What are the advantages and disadvantages of automatic transmissions?
[Summary]Nowadays, automatic transmission cars have become popular, but automatic transmission cars have many kinds of gearboxes, such as continuously variable transmission, automatic manual integration, dual clutch, etc.
- Categories:Industry News
- Author:
- Source:
- Time：2021-08-10
- Visits:0
Information
Nowadays, automatic transmission cars have become popular, but automatic transmission cars have many kinds of gearboxes, such as continuously variable transmission, automatic manual integration, dual clutch, etc., so do you know what are the advantages and disadvantages of these gearboxes? Maybe you really don't know, then listen to my answer next!
First, let’s talk about CVT: CVT is also called CVT. Vehicles equipped with CVT are mainly Audi, Nissan, Subaru, Honda, Toyota and other vehicles. It does not have multiple planetary gears, so it has no gears, so it only relies on steel belt connection to transmit power. Since there is no combination and separation of gear sets, there will be no interruption of power, so its smoothness is very good, and there is no frustration at all. At the same time, because the more transmission ratios, the more "gear positions", and the vehicle experience The better, and it is also very good in terms of fuel economy.
But also because there is no gear set, the CVT gearbox cannot withstand the output of high torque, and there will be no such pleasure of shifting gears with hands up and down, lack of sportiness, and relatively boring driving for the driver. .
Next, let’s talk about hand-in-one: Hand-in-one is also called AT. AT gearbox is currently the most mature type of automatic transmission and has the highest application range. At present, it is known as the main force among luxury brands and joint venture brands. For example, BMW’s 8AT, Mercedes-Benz’s 9AT and Ford’s 6AT, the domestic brands of Haval H8 and H9’s 8AT are also purchased from ZF, and the Trumpchi GS8’s 6AT is purchased from Japan’s Aisin Seiki. Moreover, its performance is relatively stable, but the transmission efficiency is low, which will cause part of the power to be damaged.
The automatic manual gearbox guarantees easy operation, and at the same time, the timing of shifting can be controlled by the shift paddles, gear levers, etc., providing a certain degree of driving pleasure. At present, the mainstream gearboxes on the market range from 4AT to 9AT. The Mercedes-Benz 9AT, which has the best ride comfort, says it will not develop a 10-speed gearbox. It is said that the 9-speed gearbox is excellent in terms of fuel efficiency and performance. There is no need to upgrade to a 10-speed transmission.
Finally, let’s talk about the dual-clutch gearbox, also called the DCT gearbox. It can be said to be an upgraded version of the manual gearbox, because it cancels the hydraulic torque converter, so it can’t buffer the speed at low speeds, which makes it uncomfortable. A sense of frustration. However, the manufacturers are now restraining it very well, making it a qualitative improvement in ride comfort.
But no matter how the manufacturer suppresses it, its structure still limits the effect of the transmission, and there is definitely a sense of frustration. Especially at low speeds, if you exercise at low speeds for too long, the feeling of frustration will increase and you will get fever. How can this be solved? One way is to soak the gearbox in liquid! This is the wet dual clutch, and the dry dual clutch is still cooled by natural ventilation.
Generally speaking, the three mainstream automatic gearboxes on the market have their own advantages and disadvantages. Only when you find a gearbox that suits you will you not regret it.
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