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CVT or automatic transmission

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Today I want to talk about two types of automatic transmission, it is automatic and CVT. How are they different, and yet, what transmission is better? Let’s talk about it……..

CVT or automatic transmission

CVT or automatic transmission

We begin, in our article “CVT or automatic“, with an automatic transmission, perhaps because in the choice of an automatic transmission or CVT, the first widespread use began to put this automatic transmission. Thus, the automatic transmission.

Automatic Transmission


CVT or automatic transmission

automatic transmission

Automatic Transmission or simply automatic. First appeared in the shipbuilding industry in 1903. And the inventor of the automatic transmission, is a German professor Fettinger was he who first proposed a hydrodynamic transmission, which would unleash the screw and the motor vehicle, so was born the fluid coupling, which is the most important part of any automatic transmission. Later in 1940, the Americans put first car automatic transmissions in cars Hydramatuc Oldsmobile.These automatic transmissions, and sow per day. An automatic transmission contains two main elements, a proper torque converter and gearbox itself. The torque converter automatic transmission replaces the clutch, how it works is smooth, smooth, gear changes. Gearbox automatic transmission, contains all the pairs of gears in constant mesh. This allows for a compact complete mechanism, which has several stages. Initially, there was no front-wheel drive, the cars were driven back and in this situation automatic transmissions had only three transfers that were enough, other times cars now have front-wheel drive and automatic transmissions, were others, have automatic transmissions, which are 4, 5 and 6 assists. The only bad thing, automatic transmissions, say not so dynamic in gear.

Now I want to list the pros and cons of automatic transmission (Automatic)

Plus automatic transmission

1) Easy to drive (no need to think about how to begin to move and what to include transmission, automatic transmission does it for you)
2) Increased resource strength (for automatic transmission is very difficult to burn the clutch, but on the manual transmission, especially for beginners, it is very often the case)
3) Longer life of the engine (automatic transmission switches speed, sparing the motor vehicle that is not spins it to the limit, respectively, reduced engine wear)
4) 6 – speed automatic gearbox, fuel consumption, less than a mechanical transmission (of course everything is relative, if you ask for, then the manual transmission, you can spend much less fuel, but with the average city driving, 6 -speed automatic gearbox, spends slightly less than or as well as on the manual transmission.)

Lows automatic transmission

1) An automatic transmission does not have the dynamics, as for example CVT or manual gearbox.
2) Automatic transmission, especially 4 – speed, fuel consumption is greater than the variable-speed drive, or a manual transmission.
3) Automatic Transmission, difficult to repair if broken, then this implies a large amount of
4) transmission oil in an automatic transmission is also larger, about 8 – 10 liters, for example in the variator 5 – 8 liters, the manual transmission 2 – 3 liters. Also, the oil must be changed more frequently than the manual transmission (70 – 80 thousand km) and a variable-speed drive (90 – 100 km of), automatic transmission (50 – 70 thousand km)
5) At very low temperatures, it is better not to go in a car with automatic transmission (automatic), the oil thickens.

Now in our article “CVT or automatic transmission” is a second applicant, it is a variator (CVT).

CVT (variator)



CVT or automatic transmission

CVT (variator)

Continuously Variable Transmission (CVT). Many believe CVT later invention than, say an automatic transmission, but there is no principle of the variator has invented by Leonardo Da Vinci, as many as in 1490, only to introduce it to the masses, he failed, he simply did not have such an internal combustion engine, which have modern cars. However, the principle of two cones pointing in different directions and the tapered sides stretched between the belt, it is suggested that Da Vinci, such designs are used in mills, this is a primitive and CVT. Then about CVT, as they forget and only in the early 19th century, the principle of the variator are beginning to use the machines in the industry, but to automobile variator, far away. The first had the idea to use a variator for the car, it’s a Dutch engineer Van Doorn Hubert, who created the continuously variable transmission Variomatic. This transmission was put on the production of a company DAF, in 1958. Was put on the car with the engine 0.59 сс. The success was overwhelming and then many manufacturers have thought about installing the variator on their models. Here is a brief excursion into history. Now the principle of operation.
Thus, variable or stepless variator, a type of automatic transmission. The only difference from the same automatic transmission, CVT has no velocity. CVT has two pulleys, one drive, the second slave, which are located opposite each other, and tightened the belt, but that’s now a metal belt, and even trapezoidal. Cones variator, not solid as it was before, they have a sliding halves. When the drive pulley to push the belt rotates in a small diameter, drawing faces on its surface, a kind of fifth – sixth gear. But if the pulley is shifted, and the belt rotates large diameter, the maximum ratio is obtained, which corresponds to the first gear. Further shifting the pulley, you can smoothly reduce the maximum gear ratio, that is the maximum speed switch smoothly, although they are not, but the ratios correspond to velocities in the ordinary automatic transmission. All this makes the CVT, a very effective link between the engine and wheels.
Now in our article “CVT or automatic transmission,” let’s describe the pros and cons of the variator.

Pros variator

1) The dynamic overclocking (faster than a manual transmission and automatic transmission)

2) Reduced fuel consumption (much less than the automatic transmission and not much less than in the manual)
3) No transfer, and accordingly there is no jerking switch that provides additional benefits to smooth and dynamism of the
4) Longer engine life (as well as automatic transmission, CVT does not tear the engine)
5) Easy to drive (beginners, as well as on the automatic transmission, no need to learn the basics of driving, riding or shifting gears on manual transmission)

Cons variator

1) The complex, very complex repairs (the variator is not fully understood, so the repairs involved only authorized dealers, but it is not very cheap)
2) Replacement of belt between pulleys, 100 – 150 thousand kilometers, is also not cheap and do not all stations.
3) The complex electronics, which accompanies the CVT, and it fails again, go to formal, again to pay dearly.
4) Oil in the variator, a special and very expensive to buy is not so easy, with a particular variator, you need some oil.

To sum up. What is better, CVT or automatic transmission. On their own, technical features, variable lot, ahead of an automatic transmission, and this dynamic acceleration, and low fuel consumption, and without ryvkovoe smooth shifting. But the repair of the variator is very expensive and again, not every service station for him shall be taken, there is simply no specialists. Automatic transmission, then wins, he studied more and do it quickly and cheaply, no official station, they repaired long ago. I will say this, if you buy a new car warranty, the CVT is better for the guarantee and in case of damage, all repaired. But if you buy a car after the warranty, it is best to look in the direction of the automatic transmission, because it is easier and cheaper to repair than the CVT.
That’s all I think we, Auto Blog, who helped define it.

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