referred to the AT automatic transmission, full name Auto Transmission, which is a torque converter, a planetary gear and the hydraulic control system components, and through a combination of hydraulic transmission gear to achieve variable speed torque.
1. Noun interpretation automatic transmission
referred to the AT automatic transmission, full name Auto Transmission, which is a torque converter, a planetary gear and the hydraulic control system components, through a torque transmission mode and gear assembly to achieve variable speed torque.
2. The structural characteristics of the automatic transmission
and compared with the manual transmission, automatic transmission are very different in structure and use. Mainly by adjusting the various manual transmission gear assembly to replace gear, the automatic transmission is by way of a gear and the hydraulic transmission in combination to achieve the purpose of the transmission. Wherein the torque converter automatic transmission is the most characteristic part, which consists of a pump wheel, a turbine, and a stator composed like member, the pump and the turbine wheel is a pair of working composition, the liquid pump driven by the turbine wheel to rotate, and the pump impeller between the turbine and the guide wheel by the reaction force between the impeller and the turbine so that the rotational speed difference to achieve variable speed and torque to achieve the function, the driver, you only need to hold the pedal in different strength, speed automatic transmission can be carried out bit down.
Since the automatic transmission torque converter torque variation range is not large enough, so the turbine back again several series Top planetary gear efficiency, hydraulic control system will work with its own actuating the planetary gear of the engine changes, so that the automatic transmission variable torque. In order to meet various needs (such as parking, reverse) and the like during running, the automatic transmission is also provided with some manual lever position, P range image (parking), R stopper (rear stopper), N range (Neutral) , D range (forward) or the like.
From the performance said that the more gear automatic transmission, the car is also in the process of moving more smoothly, the better acceleration, but also more fuel-efficient. In addition to providing relaxing driving experience, automatic transmission also has not overcome the deficiencies. Automatic power transmission is not a direct response, making it the “fun to drive” slightly less than. Furthermore, since the hydraulic transmission, the automatic transmission of the power transmission which has a loss.
3. The operating principle of the automatic transmission
The principle of the automatic transmission presentation