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Level 3 Torque Converter

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During the 4-month semester for Level 3 Drivetrains we reviewed in detail the operations for Torque converters, Planetary gears, Inputs and Outputs for Allison World Transmissions, and Power flow for Allison 1000/2000 series transmissions. In this essay, I will be revising and explaining how these systems work and what operations they serve. Torque converters act as the main torque multiplier in any automatic transmission, starting from the engine, going through the torque converter, then into the transmission. There are three main parts to the torque converter. The impeller, which is driven by the engine crank shaft or the flywheel. The stator, which is a freewheeling rotating member that also includes a one-way clutch. The turbine is a …show more content…

A driver input (drive range such as drive, neutral or reverse), A speed signal, and a load signal from the Throttle position sensor. The driver input from the shifter controls a hydraulic spool valve on the transmission, blocking a port when placed in neutral or park. The speed signal is acquired by the governor valve. This valve is placed on the transmission output shaft and is controlled by hydraulic main pressure. The load signal or TPS is the last key to controlling an automatic transmission. The load signal is sent to the TCM by a cable or electric signal sent from the TPS. When load is applied, it will move a throttle position valve on the …show more content…

These three paths all start from the rotating clutch module attached to the input shaft. There are five rotating clutches known as C-1, C-2, C-3, C-4, and C-5. There are also three planetary gear sets known as P-1, P-2, and P-3. All power flows have a few requirements. They must have an input through either C-1 or C-2, and they have to output through the P-3 carrier because it is splined directly to the output shaft of the transmission. The way these gears are put together forms the world transmission. The P-1 sun gear is directly bolted to the driving member attached to a rotating clutch. The P-1 carrier is splined to the P-2 ring gear, also being controlled by the C-4 clutch. C-3 is splined to the P-1 ring gear. The P-1 gear set is driven through an input from the P-1 sun gear. P-2 ring gear is attached directly to the P-1 carrier and the C-4 rotating clutch. P-2 sun gear rides on main shaft through a set of splines, as well as being in contact with the C-5 clutch. P-2 can be inputted through 2 means, the C-2 clutch driving the P-2 carrier or through the sun gear on the main shaft. The P-3 ring gear is splined to the p2 carrier. C-5 clutch and the P-3 ring gear is meshed together and the P-3 sun gear is again, splined to the main shaft. In order for the Alison transmission to function, there needs to be a series of clutches being applied to achieve the selected or desired gear to

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