Transmission Features
Manual Transmission MT: manual transmission, also called manual transmission, that is, shifting the shift lever by hand can change the gear meshing position in the transmission, change the transmission ratio, so as to achieve the purpose of shifting speed. When you step on the clutch, you can dial the shift lever. If the driver's technology is good, a car equipped with a manual transmission is faster than an automatic transmission when it is accelerating or overtaking, and it is also fuel-efficient. The disadvantage is that when the vehicle is driven on a crowded road, frequent shifts will cause the driver's fatigue.
Automatic Transmission AT: An automatic transmission that uses a planetary gear mechanism to shift gears. It automatically shifts gears according to the degree of accelerator pedal and changes in vehicle speed. The driver only needs to operate the accelerator pedal to control the vehicle speed, so that the car can obtain good dynamic performance and fuel economy, and reduce engine emission pollution.
Tiptronic transmission Tiptronic: manual / automatic integration gearbox, manual / automatic can be freely converted, automatic adjustment of engine speed and gear, while having manual transmission driving pleasure and the convenience of automatic transmission. In addition to the D, 3, and 2 gear positions of the automatic gearbox, as long as the gear lever is pushed to the left, it can be moved up and down to move forward and backward. At this time, the driver can freely select the gear, not limited to automatic gear selection of the automatic system. In order to avoid engine damage caused by wrong shifting, the Tiptronic system operates in manual mode, if the engine speed is too high and the driver If there is still no shift, the computer will intervene to perform the shift in due course. Conversely, the driver will shift gears at an inappropriate engine speed and the computer will immediately make a judgment to avoid damage to the car.
CVT: Continuosly Variable Transmission (CVT) technology is a continuously variable transmission technology. It adopts transmission belts and main and driven wheels with variable working diameters to transmit power, and can achieve continuous change of transmission ratio, thereby obtaining a drive train and an engine. The best match for working conditions. Common continuously variable transmissions include a hydromechanical continuously variable transmission and a metal belt type continuously variable transmission (VDT-CVT). The automatic transmission is designed for easy operation and reduced driving fatigue. According to the control method of the gear transmission system, it can be divided into a hydraulically controlled hydraulic automatic transmission and an electronically controlled hydraulic automatic transmission; according to the change of the transmission ratio, it can be further classified into graded Automatic transmission and stepless automatic transmission. Therefore, a continuously variable transmission is actually one type of automatic transmission, but it is much more complicated and technically more advanced than a common automatic transmission.
The biggest difference between a continuously variable transmission and a common hydraulic automatic transmission is the structure. The latter is composed of a hydraulically controlled gear transmission system or a gear. What it can achieve is infinitely variable transmission between two gears. The continuously variable transmission is composed of two sets of shifting discs and one belt, which is simpler and smaller than traditional automatic transmissions. In addition, it can freely change the transmission ratio, thus achieving full-step continuously variable transmission, so that the vehicle speed changes more smoothly, and there is no feeling of "ton" when shifting the conventional transmission.
DSG (Direct Shift Gearbox) Chinese surface means "direct shift transmission." DSG transmission is different from general transmission system, it is based on manual transmission, not automatic. Manual is much more efficient than automatic, and DSG can provide uninterrupted power output in addition to manual flexibility and automatic comfort at the same time. When the conventional manual transmission depresses the clutch, the output of the power is interrupted, and the ordinary automatic transmission is not without the clutch, but the clutch is changed to be controlled by the computer, and power interruption will occur when the gear is shifted. .
There are two automatically controlled clutches in the DSG transmission. In one gear, the clutch 1 is combined and a set of gears engage the output power. When the gear is approaching the gear, the next set of gears has been preselected and linked to it. The clutch 2 is still in a disengaged state; when switching to the next gear, the clutch 1 in the active state is disengaged, the gear in use is disengaged, and the clutch 2 engages the preselected gear and enters the next gear. During the entire gear shift, the two groups of clutches work alternately to ensure that at least one set of gears is delivering power so that there is no discontinuity in power.
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