Before understanding the structure of the geartronic transmission, we must first know why the gearbox is needed and what it does. According to different driving conditions, the speed and power requirements of the vehicle can be changed within a large range. To achieve this, in addition to effective braking, the choice of gear is also very important. Therefore, changing the transmission ratio to adapt to different driving conditions is a major role of the gearbox. In addition, the realization of reversing and the use of neutral to cut off the power transmission without turning off the engine are also the reasons why geartronic transmission is widely used in the field of internal combustion engines.
Manual transmissions aren't a hallmark of lower-spec models. This position needs to be stated before the introduction of this type of geartronic transmission. Vehicles equipped with manual transmissions require the driver to switch gears with their hands and feet during driving. But some people also see this direct communication with machinery as a joy.
The manual transmission also has gears. We commonly have a 5-speed manual geartronic transmission and a 6-speed manual transmission. What is certain is that the more gears, the tighter the gear ratio can be, the more comfortable the power connection will be, and the better the performance of fuel economy and comfort at high speed.
From the point of view of operation mode, models equipped with AMT geartronic transmission can be attributed to the category of automatic transmission models. But structurally speaking, the AMT gearbox adopts the structure of the manual geartronic transmission more. However, it controls the clutch through a set of servos, freeing the driver's left foot. The mechanism installed above the geartronic transmission is the control module of the AMT gearbox. Under the deployment of the transmission control unit, the control module can control the clutch and at the same time select the gear required for driving. During the entire driving process, the driver controls the vehicle speed only through the accelerator and brake pedals. Of course, you still have to flip the shift lever to select neutral, forward or reverse.
At present, the vast majority of automatic geartronic transmission models on the market are equipped with this type of automatic transmission, and the number of gears is still one of the standards to measure the technical content. The original 4-speed automatic transmission is no longer mainstream. At present, most family cars have 5 or 6 gears, while luxury cars favor automatic transmissions with more gears.
As early as 1886, the CVT continuously geartronic transmission was installed on a Mercedes-Benz car. However, due to the immature technology in all aspects at that time, the gearbox of this structure has not been paid attention to at that time. With the continuous advancement of technology, CVT technology has also matured, and its advantages in transmission smoothness and fuel economy have been highlighted. In terms of driving operation, a car equipped with a CVT also uses a shift lever to select park, reverse, neutral, and forward or manual gears.
To distinguish from the operation mode, the twin clutch automatic transmission still belongs to the category of automatic transmission. It is somewhat similar to an AMT automatic transmission. All of them rely on switching gears with different gear ratios between the shafts to change the transmission ratio, and the device responsible for cutting off or engaging the power is also realized by the clutch located at the input end of the gearbox. In terms of shifting speed and shifting quality, the more logical dual-clutch automatic transmission is better than the AMT clutch actuator transmission.
The dual-clutch geartronic transmission is composed of a gear box responsible for realizing different gear ratios of each gear, a dual-clutch control module for switching or engaging power, and an electromechanical control module for coordinating various actuators. Compared to other types of automatic transmissions, the twin clutch automatic transmission has less power interruption during the shift process, so it is faster and improves fuel economy to a certain extent.