The core logic of AT transmission automatic shifting is that it has a transmission control module. AT transmission consists of three parts: torque converter, transmission control module and speed change mechanism. The torque converter is a power component, which is responsible for flexibly transmitting the power of the engine to the transmission. Since it relies on the hydraulic oil filled inside to transmit power, when the brake wheel stops rotating, the drag force will not be fed back to the engine, and the engine will not be stalled.
The transmission control module is the core of the AT transmission, which can automatically identify and automatically send shift instructions. The controller control module is located at the bottom of the gearbox. It consists of a large number of integrated circuits and oil channels. When it collects engine speed information, the opening information of the driver’s accelerator pedal and the current vehicle speed information, it can identify the driver’s operating intention to decide whether to shift up or down, and then control the locking of the clutch plate in the speed change mechanism by adjusting the pressure of the oil in the oil channel in the shift valve body, and finally realize the shifting and speed change through the planetary gear. Among them, each of the densely packed oil channels has its specific function. For example, the clutch plate can be pressed to close by the pressure of the oil in the oil channel. By locking and releasing these clutches, different combinations of planetary gears can be realized and different speeds can be output, thus realizing the automatic switching of different gears.
The speed change mechanism in the transmission is commonly known as the planetary gear and multi-plate clutch plate. The planetary gear set is responsible for completing the conversion of different transmission ratios. The multi-plate clutch plate is responsible for locking and releasing the engagement of different mechanisms in the planetary gear set. The gear combinations of different planetary sets are also different, and the speeds obtained are also different. The speed change mechanism is a specific command executor. They are only responsible for switching the corresponding gear and outputting the corresponding speed. They do not have their own thinking and consciousness and do not have automatic control capabilities.