When Brother Meow chats with many old driver friends, he always hears them say that the AT gearbox is the best. In fact, it cannot be said that AT is the best, only that it is moderate, but not mediocre.
Because of what other gearboxes can do, the AT gearbox is also not bad, it is like a generalist, everything can be done. Today, Brother Meow will talk to you about why the AT gearbox is so pleasing to the old driver.
An AT transmission is particularly durable
This transmission form of AT hydraulic + gear itself has advantages, and normal use and maintenance are basically not bad.
As long as the car is not scrapped, the gearbox will not be scrapped, because the internal structure of the AT gearbox is special, and its torque withstand limit value is very large.
All car transmission gears are made of high-strength carburized steel, which is durable. It's just that the AT transmission is connected to the engine as a torque converter, and this component has a longer lifespan than other gearboxes.
Also, at transmissions are more durable than other gearboxes. When the manual transmission is improperly operated, it will overheat, and the bearing capacity of the dual clutch itself is not as strong as that of the AT, it is easy to slip, and the clutch piece must be replaced after a long time.
Therefore, as long as you don't use it excessively, 60,000-80,000 kilometers to change the transmission oil, basically can be used all the time. Like The old corolla of the meow brother has been 15 years old, has run more than 300,000 kilometers, with a 4AT gearbox, and has never had a problem.
Two AT shift speed is fast
In terms of shift speed, the dual clutch should be the fastest. In fact, compared to the dual clutch, AT is not so bad.
From a structural point of view, AT shifting is carried out through several sets of brake clutches, which are slightly similar to double clutches, when one clutch is separated, and the other clutch is already in the process of binding.
In theory, the AT shift speed can also be done very fast, a few years ago, Aisin 8AT can achieve 100 milliseconds of shift time.
Moreover, for AT, the pursuit of gear shift speed not only improves the sporty performance, but also improves reliability and durability.
Three AT is as smooth as CVT
In terms of shift rides, the CVT is the best. Since there is no transmission gear of the general automatic transmission, there is no shift logic, and the frustration of shifting is naturally gone. The power output of the CVT transmission is linear and indeed smooth during driving.
The AT gearbox, although not as beautiful as the CVT in terms of smoothness, is also close to the CVT.
AT's gears in the market have long been 6AT and 8AT, and even 9AT and 10AT, the more gears, the smaller the gear ratio gap between each gear, basically no different from CVT.
The reason why AT can achieve so many gears is related to its structural principle.
In terms of shift ride, the AT is not as perfect as CVT, but it is very close.
Four AT is also very fuel-efficient
Many people said that AT has always been an oil tiger, but now the gearbox technology is also improving, and AT is becoming more and more fuel-efficient.
Manual transmission and dual clutch fuel saving, mainly their absolute transmission efficiency is high, belonging to the hard connection. At high speeds, the AT also learns them, completely locking the torque converter at high speeds, and can also achieve 100% hard connection.
The CVT is fuel efficient because it has a large gear ratio range and is continuously variable, so the engine has been working very comfortably. The AT can do as many gears as possible, so as to work like a CVT, which can also achieve the purpose of fuel saving.
Although the AT is not yet the most fuel-efficient gearbox, the gap with other types of transmissions is not so large.
At last
In general, AT is durable, fast gear changes, smooth without setbacks, and fuel saving. So it does make sense for old driver friends to think that AT is the best gearbox.