Automatic Transmission Parts

Often known by many names and abbreviations, such as AT, auto transmission, self-shifting transmission, or n-shift transmission (' n ' is the number of forward gear ratios). The automatic transmission, as these names indicate, helps the vehicle to automatically change gears on acceleration and deceleration without the hassle of manual shift. This handles the internal combustion mechanism of the engine efficiently and controls speed, torque and strength to produce varied outputs, without pause or jerks. The automatic hydraulic transmission is the most common transmission used in today's cars. Larger, equally working parts are used in gigger vehicles. In place of friction clutch, a fluid coupling is used which changes gears by hydraulically locking and unlocking the planetary gears. The automatic transmission has set gears with parking gear that locks the output shaft to keep vehicles from rolling back or forward. For vehicles where speed such as a forklift or lawn mower is limited, a simple torque converter is used to shift energy from the engine to the wheels.

There are other types of systems other than the hydraulic automatic transmission system that are also used in the automotive industry. These are Continuous Voltage Variable (CVT) and Semi-Automatic Transmission. Such systems use the transmission control unit to anticipate gear changes, instead of allowing the driver to manually shift gear. During internal operation, standard automatic transmissions differ widely from a CVT and Semi-Automatic transmission system. The CVT makes use of a belt or torque transmission to allow the transmission to have an infinite number of automatic transmission gears instead of finite gear ratios. In semi-automatic transmission, the clutch is operated by electrohydraulic processes, in the present as in the manual transmission. In some models, one may also consider the manual shifting facility such as paddle shifting, whether automatic, semi-automatic or CVT. The best advantage of an automatic transmission system is that there is no need to coordinate between the automatic transmission clutch and the gear. This decreases exhaustion and makes a more relaxed and relaxing ride for the rider. This service is more useful when the driver has long distances to travel. Automatic transmission system has also enabled many people with disabilities to be self-sufficient in driving. It also makes for a more concentrated drive on the lane, thus reducing accident chances. The automatic transmission also improves vehicle control at low and idle speeds. Nonetheless, the common hydraulic system reduces the power transferred to the engine and the drivetrain due to the fluid coupling that is attached to the gearbox. This may result in lower torque ratings compared with the same engine specs of manual transmissions. It can also lead to reduced fuel economy in urban traffic.

An automatic transmission system uses a variety of moving parts for its operation. This happens with the use of various mechanical components, fluids and electrical parts working together in complete coordination, enabling smooth ride and avoiding any jerks while shifting. The power is sent to the torque converter pump by the engine. The power from the pump goes to the converter turbine via transmission fluid. The fluid is sent back by the turbine via the stator. The power in the transmission fluid is multiplied using a stator, allowing the pump to send more power to the turbine. This results a vortex power rotation in the converter. The turbine connected to the central shaft connects it to the transmission. The shaft spins as the turbine spins, which sends power to the gear set of the transmission. Depending on the clutch disc and brake band engagement, the transmission decides whether to move the gears or stay stationary. Depending on the moving parts, the gear system decides the gear ratios and decides the amount of power needed from transmission for the drivetrain. That is basically how a transmission system works automatically. There are various sensors and control modules to support all the physical functions of the system.