As you know, car gearboxes can be divided into automatic and manual gearboxes. But not all people are able to tell the whole story about the types of automatic transformers and how different they actually work. In this period, we're going to look at the three automatic transformers: at, cvt, dsg。
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The structure and working principles of the at automatic gearbox:
The automatic transformer boxes are now typically liquid transformer-type automatic transformers, known as “at” automatic transformers. It consists mainly of two major components: a liquid rectangles connected to motor wheels. 2. The speed transformer that follows the liquid rectangles。
Liquid rectifiers are typically composed of pump wheels, foliage wheels, turbines and lock-concreteers. The role of the lock-delayer is to connect the engine directly to the speed-relayer when the speed of the vehicle exceeds a certain speed, which reduces fuel consumption。
The liquid rectangular function is to transmit the engine power output to the speed structure. It is filled with moving oil, and when the pump wheel that is connected to the power input axis turns, it moves with the turbine that is connected to the output axis, thereby transmitting the engine power. It works like a plug-in fan can drive a non-trapped fan to spin a leaf。
Each of the slots in the at automatic gearbox is controlled by a set of disassembly pieces, thus achieving the speed function. The current at automatic transformer is controlled by an electromagnetic valve, making the system simpler and more reliable. The transfer gear of the at automatic gearbox is different from that of the manual gearbox. The at automatic gearbox uses the conversion of the planetary gear group to the twister。
The way in which the at automatic transformer box is controlled is shown in the figure above. The gearbox controls the actions of the electromagnetic valve by means of a telecommunications signal, thereby altering the direction of the transformer tank oil in the valve channel. When the oil pressure on the polyps reaches the kinetic pressure, the polysynthesis joins, thus prompting the corresponding planetary gear groups to output power。
The planetary gear group includes planetary shelves, gears and solar wheels. When one of the three components mentioned above is fixed, the power is transmitted between the other two components. If not, see video below。
The structure and working principles of the cvt automatic transmission box:
The main components of the cvt ungraded gearbox are two sliders and one metal belt, which is placed on two sliders. The wheel consists of two wheels, in which the dents in the middle form a v shape, one of which is controlled by a hydraulic control body and which can be separated and drawn at different motor speeds, and the dents in the v form become wide or narrow, raising or lowering the metal belt, thereby altering the diameter of the metal belt in contact with the wheel, which is equivalent to switching gears in different diameters at gear speeds. Two of the wheels are re-adjusted in reverse, i. E., when one of the grooves becomes wider, the other grooves become narrower, thereby rapidly increasing the movement ratio。
When a car moves slowly, the width of the dent of the active slider is greater than that of the passive slider, and the metal radius of the active slider is smaller than the circular radius of the passive slider, i. E., the small round belt large, so that it can pass the larger turn-around; when the vehicle gradually moves to high speed, the one side wheel of the active slider leans towards the inside, the smaller width of the groove forces the metal to rise up to the top and the other side wheel of the passive slider to the opposite extent, the movement of the large tusk width forces the metal belt to drop, i. E., the round radius of the active slider metal belt is greater than the half of the circle of the passive slider metal belt, so it becomes a small round belt, thus ensuring that the speed required for the vehicle to travel at high speed
The structure and working principles of the dsg automatic transformer box:
There is a temporary break in power transmission between the separation and connection of the clutch when the manual block vehicle is switched. This has had little impact on civilian vehicles in general, but it has had a significant impact on the success of races. Double-disconnected gearboxes can eliminate interruptions in power transmission during block shifts, shorten block shifts and make them more smooth。
The above figure is a six-speed dsg double-disconnected gearbox for the public. Two clutches were assembled in the same unit as the gearbox, one of which (1) was attached to one, three, five and reverse; the other (2) was attached to two, four, six. When the driver is on the first block, the crossbar is on the first and the second block at the same time, but the clutch 1 is combined, the clutch 2 is separated, the power is exported through the first gear, and the second gear is emptied. When the driver turns to the second block, the fork shift is accompanied by two and three barriers, and the clutch 1 is separated by a combination of two and power is exported through two gears and three gears are emptied. The remaining tranches are transitioned in a similar manner. This solves the problem of power transmission interruptions during the breakout。
The above figure is a popular seven-speed dsg double-disconnected gearbox working in a similar way to six speeds. Compressor 1 controls block 1, 3, 5, 7; clutch 2 controls block 2, 4, 6 and reverse。
If you still don't understand the principles of the double-segregation gearbox, you can see a summary of the principles of the six-speed dsg bin above. This sketch shows very clearly the dynamics of the double-segregation gearbox. Here's a video about the working principles of the double-segregation gearbox。
