casinilogic

How The Automatic Transmission Works The animation below shows how all of the parts are hooked up in a transmission. Move the shift lever to see how power is transmitted through the transmission. First Gear • In first gear, the smaller sun gear is driven clockwise by the turbine in the torque converter. The planet carrier tries to spin counterclockwise, but is held still by the one-way clutch (Which only allows rotation in the clockwise direction) and the ring gear turns the output. Second Gear • This transmission does something really neat in order to get the ratio needed for second gear. It acts like two planetary gear sets connected to each other with a common planet carrier. • The first stage of the planet carrier actually uses the larger sun gear as the ring gear.

So the first stage consists of the sun (The smaller sun gear), the planet carrier, and the ring (The larger sun gear). • The input is the small sun gear; the ring gear (Large sun gear) is held stationary by the band, and the output is the planet carrier. Third Gear • Most automatic transmissions have a 1:1 ratio in third gear. You'll remember from the previous section that all we have to do to get a 1:1 output is lock together any two of the three parts of the planetary gear. With the arrangement in this gear set it is even easier -- all we have to do is engage the clutches that lock each of the sun gears to the turbine. • If both sun gears turn in the same direction, the planet gears lockup because they can only spin in opposite directions.

Automatic transmission is a type of automotive transmission that can automatically change the gear ratios. This does the work of changing gears for you when driving.

This locks the ring gear to the planets and causes everything to spin as a unit, producing a 1:1 ratio. Overdrive • By definition, an overdrive has a faster output speed than input speed. It's a speed increase -- the opposite of a reduction. In this transmission, engaging the overdrive accomplishes two things at once. In order to improve efficiency, some cars have a mechanism that locks up the torque converter so that the output of the engine goes straight to the transmission.

• In this transmission, when overdrive is engaged, a shaft that is attached to the housing of the torque converter (Which is bolted to the flywheel of the engine) is connected by clutch to the planet carrier. The small sun gear freewheels, and the larger sun gear is held by the overdrive band. Nothing is connected to the turbine; the only input comes from the converter housing. • So the output spins once for every two-thirds of a rotation of the engine. If the engine is turning at 2000 rotations per minute (RPM), the output speed is 3000 RPM. This allows cars to drive at freeway speed while the engine speed stays nice and slow. Reverse • Reverse is very similar to first gear, except that instead of the small sun gear being driven by the torque converter turbine, the bigger sun gear is driven, and the small one freewheels in the opposite direction.

The planet carrier is held by the reverse band to the housing. • So the ratio in reverse is a little less than first gear in this transmission. We give our thanks to for allowing us to use their info and graphics! Ekey Control4 Driver here. For more information on how engines or anything else in this world works, visit.

Automatic Transmissions For a car owner, there may be no better invention than the automatic transmission. Giving drivers the ability to drive without having to shift gears, the automatic transmission makes driving easier than ever before. Unfortunately, with all the advantages that your automatic transmission provides, it also has many things that can go wrong with it. If your automatic transmission breaks down, call GotTransmissions.com. Solidworks 2013 Crack 64 Bit on this page. We sell new and used transmissions for every make and model vehicle on the road.