E-CVT a CVT? Why do individual CVT models also have paddle shifters?
At present, the mainstream gearboxes are AT dual-clutch and CVT, but now some manufacturers also divide CVT into categories like E-CVT, S-CVT, W-CVT, etc. In fact, these propaganda are more of a kind Marketing gimmick. There are also paddle shifters that are only used by some models that advertise sports, is also equipped on CVT models, is it still tasteless?
1. E-CVT is mainly used in hybrid vehicles. It is not a CVT in the strict sense. , And then transmitted to the wheels through the drive shaft, completing the power transmission of the engine. E-CVT is often used in hybrid models, such as , Accord hybrid models, and Qin Plus DM-i, etc. It is more like a "power distribution device", for example, it contains two motors. And a set of planetary gear sets or Honda's overrunning clutch , although it also has the same continuously variable transmission features as a CVT, but it is not a true CVT in terms of structure, because of its working nature Not only to transmit force, but also to take into account the role of starter and generator, so it cannot be a gearbox in the strict sense.
2. S-CVT and W-CVT are actually a kind of gearboxes, which are optimized versions of CVT
Toyota often calls its own S-CVT. On the basis of CVT, a gear set is added to transmit power through gears at the start.After reaching a certain speed, it is switched to steel belt transmission, which improves the low-torque characteristic of the CVT when starting, and also expands the transmission ratio range of the CVT gearbox, which is a good help in improving fuel economy. Of course, higher costs and frustration when switching from gears to steel belt transmission are also inevitable. So the more advanced name is just a marketing gimmick for manufacturers, because its essence is still CVT.
3. Although the paddle shifters on the CVT model are not very useful, they are not too tasteless. Convenient shifting, but it has also been used in some advertised sports models in recent years, but most of them are only used on AT and dual-clutch models. At present, 2.0T models like Teana are also equipped with shifters. Shift paddles, so people have doubts, “CVT is a continuously variable transmission, why use paddle shifters? In fact, netizens are right, but CVT models also need to shift gears. CVT models shift gears. The variable speed effect is achieved by changing the area of the driving cone wheel and the driven cone wheel, and the solution to change the area is to change the oil pressure in the cone wheel cylinder, so the shift paddle is an additional program for manually controlling the hydraulic cylinder, the same Realized "manual shift", but the principle of CVT is really not suitable for "sports", so the use experience of CVT models with shift paddles is still inferior to dual-clutch and AT in terms of shifting speed, so more The function is to deal with extreme vehicle conditions such as long-distance downhills, and it is not a tasteless one.
So CVT is still a CVT, smooth fuel economy is its characteristic, and it is not as magical as the manufacturer advertises.
(text /Zeyu The picture in the text comes from the Internet, if there is any infringement, please contact to delete)
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