Continuously variable transmission( CVT) · Primary and secondary Vpulleys · Steel belt or chain · The gear-ratio change is continuously variable.
Automated manual transmission (AMT) · Diaphragmspring dry clutch · Spur gears · The gearratio change is stepped.
Chapter 6 Power train
3.5 Automatic gearbox
servos. When fluid passes through the accumulator on the way to the servo, it must move the accumulator piston against spri l systems (Fig. 3-14) are used on automatic transmissions or transaxles to control the line pressure, converter lockup, shift po
3.5 Automatic gearbox
Fig.3-12 band brake
Fig.3-13 A hydraulic system Chapter 6 Power train
3.5 Automatic gearbox
Chapter 6 Power train
3.5 Automatic gearbox
Chapter 6 Power train
3.5 Automtomatic transmission with hydrodynamic converter (AT)-Conventional automatic transmission Torque converter ( Fig.3-10 ) serves as a starting clutch to facilitates smooth and comfortable drawing away, transmits and multiplies the engine torque, and damps engine torsional vibrations. gear systems are used to multiply torques, reduce speeds and reverses the direction of rotation for the reverse gear. Most automatics use the planetary gear sets (Fig.3-11). The commonly used planetary gears are Ravigneaux set and Simpson set. A simple planetary-gear set can also be connected to the upstream or downstream of a Ravigneaux set or Simpson set. Either the outer gear or the sun gear may be held stationary, providing more than one possible torque multiplication factor for each set of gears. Also, if all three gears are forced to rotate at the same speed, the gear set forms, in effect, a solid shaft.