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Seminar report and PPT: cars automatic transmission

Definition

Transmission is attached to the back of the engine and the drive wheels to engine sends power to a device. An automobile engine to a certain RPM (revolutions per minute) range runs at its best and that's keeping the engine power within range for the wheels is to ensure transmission work. It does this through the various gear combinations. In first gear, the engine into high gear to more than 70 mph the engine car can be, even if loafing while very sharp changes in relation to the drive wheels. In addition, a different forward gear transmission to also drive wheels turn in the opposite direction back to the causes to which disconnect the engine from the wheels, drive and reverse what is a neutral position.

Need guidance for automatic transmission to shift from

A manual and an automatic transmission the main difference between the gears in an automatic transmission gear ratios all the same set of produces, while the manual transmission locks and various gear ratio to achieve the output shaft gear unlocks different sets. Planetary gear set in an automatic transmission makes it possible for that device. A manual transmission is especially painful in driving you to change your gear State where traffic, stop and go. You also own transmission shifting to focus on some of your attention away when you really should be focused on the traffic when you have your tachometer or gearshift can be focused on, because dangerous driving, which can make the case that takes off. An automatic transmission is completely ignores these problems.

Planetary gear set

The current automobile automated system instead of the traditional manual transmission gear set of a planetary gear set uses. Kendrapsartaya the Sun gear, planetary gear set, planet carrier, ring based on the planetary gear (see Figure 1), the Sun gear, planetary gear and planet carrier, ring gear sets spin: in four parts. One of them closed, engaging and disengaging gear set set the planets without a reverse gear, including three different gear ratios, can generate.

The difference their planet-meshed gear is usually an automatic transmission system with two different sizes of Sun gear planetary gear set. There is only one planet carriers to connect both sets of planet gear is used. It's a compound planetary gear set is called. This design four different gear ratio and can generate a reverse gear.



Hydraulic system

This planetary gear sets in order to control the clutches and bands to control valve body through an oil pump under pressure sent by a special transmission fluid uses. Band and clutch piston are both by hydraulic system pressure. Output shaft for hydraulic systems add a Governor (see Figure 4) is called, while adding bands or clutches for part of the hydraulic system, shift valve is called. With a spring loaded valve a centrifugal Governor sensor. Fast spins, Governor More valve opens. Valve opens more, shift valve to apply pressure goes through more fluid and more. Therefore, each band and clutch output shaft of the Governor, based on a specific detected by spin speed gear can be pushed to lock.