The automatic transmission has gained immense popularity in our time. Moreover, every motorist should have heard that there is an "automatic", and there is also some kind of mysterious "variator". How does the latter differ from an automatic transmission and is it really something very special?
Let's not pull the cat by the tail and just say the main thing: "variator" - this is an automatic transmission. But the real essence of the issue is actually different. Namely, the "variator" is only one of the varieties of automatic transmission. Today it is customary to distinguish three large groups of nodes: "classic", "variator" and "robot". However, all of the above is automatic. By the way, if someone thinks that an automatic transmission is something newfangled, then he is mistaken. Early "automata" appeared in the first quarter of the 20th century. However, the beginning of the rapid development of automatic transmissions for civil cars began only in the 1950s in the United States. The peak of the popularity of automatic transmissions all over the world did not fall at all until the beginning of the 2000s.
1. "Classic" automatic transmission
Strictly speaking, this is an automatic torque converter. This technology was invented as long as the manual transmission technology. The essence of the work of the torque converter is reduced to the creation of the so-called "complex transmission", thanks to which it becomes possible to increase the torque depending on the current load. These gearboxes are based on planetary gearbox technology.
2. "Variable speed drive"
Strictly speaking, this gearbox should be called “continuously variable transmission”. Directly "variator" is a subspecies of BT. The name of such gearboxes speaks for itself. Unlike a classic machine, they have no gears at all. In this case, the torque is transmitted via an intermediate element such as a belt or roller. The CVT is a transmission for budget and economy car models. However, unlike a conventional "automatic", such a checkpoint is not able to stand still or move in reverse. That forces manufacturers to supplement any variator with torque converter elements, in particular, at least one planetary row.
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3. "Robot"
A robotic gearbox is, in fact, a cross between a classic "automatic" and "mechanics". Such a gearbox can work independently and will automatically change gears as it accelerates. However, its operation is not possible without the connection of numerous auxiliary electronics.
Continuing the topic, read about how ESP can harm the motorist with heavy snowfall.
Write in the comments what do you think about this?
Source: https://novate.ru/blogs/170221/57884/
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