Torque Converter 1
All torque converters are nonservice able.
True or False
False
What spins the turbine?
The impeller or pump.
What is attached to the input shaft of the transmission?
Torque converter turbine
What determines the actual pressure in the governor circuit?
The position of the governor valve.
What do trimmer valves do?
Help avoid shift shock.
What is an induction retarder often called?
Electric retarder
What assist in creating torque multiplication at low speeds?
Stator
How does the over running clutch work?
Springs and roller bearings.
Can you flat tow a vehicle with an automatic transmission without doing anything special to protect it?
Yes or No?
No
What are the planetary gearset components?
Sun gear, carrier with planetary pinion gears, ring gear or annulus.
What does the inhibitor valve do?
Prevents a second gear to first gear shift if the road speed is too high.
What is Governor pressure approximately when the transmission output is not rotating?
2 psi
What is stall torque on an Allison TC-10?
1.84:1
What pushes on the lockup friction disc?
Hydraulically driven piston.
Where is the largest amount of fluid in an automatic transmission system?
Torque converter
How is the hydraulic retarder activated?
By the driver when needed.
What is needed for the transmission to have a one to one turn ratios?
Lock up torque converter.
Who pioneered the use of planetary gearing in automatic transmissions for Ford Motor company?
Howard W. Simpson
Name the five stages of torque converter operation?
Torque multiplication phase, coupling phase, lockup phase, vortex flow, and rotary flow.
How does the torque converter get around that small amount of slippage?
Lockup clutch.
What is the weak component in the auto transmission that manufactures are trying to no use anymore?
Bands or Belts.
What is a standard transmission that is electronically controlled?
Engine torque is transmitted to it using a mechanical clutch.
What are some of the notable advantages of a simple planetary gearset?
Constantly meshed gears, gears forces are divided equally, versatility seven gear combinations of speed and direction, additional variations of both speed and direction can be added through the use of compound planetary gears.
In a transmission designed to start in second gear, besides governor pressure what else is used on the 1-2 shift valve and modulator valve to cause the shift valve to move upward against its stop?
Spring force
The three components of a torus consist of what?
Impeller, stator, turbine.
What kind of vehicles are variable pitch stators used on?
Specialized equipment used to transport unusually heavy loads in rough terrain.
What needs to be done in order to flat tow a car with an automatic transmission?
Drive line or half shafts need removed.
What is a hydro mechanical automatic transmission
a fully automatic transmission that uses no control electronics. Engine torque is transmitted to it by a torque converter and output ratios are optioned using planetary gear sets. Upshifts and downshifts take place with no direct assistance from the driver.
What is an electronic automatic transmission?
fully automatic transmission that is controlled by computer. Engine torque is transmitted to it by a torque converter and output ratios are optioned using planetary gear set. Upshifts and downshifts are managed electronically with no direct assistance from the driver.
Why does it look like there are two input shafts on an automatic transmission?
The outer shaft is there so that the one-way clutch has something to have leverage with.
Why does it look like there are two input shafts on an automatic transmission?
The outer shaft is there so that the one-way clutch has something to have leverage with.
Why is there no “Flywheel” required on an automatic transmission?
Because the combined mass of the T/C and flex disc acts like a flywheel to smooth out the power pulses produced by the engine.
A five-speed, four gear set transmission uses six clutches, what are they and what do they do?
Forward clutch locks the converter turbine to the main unput drive shaft. First clutch anchors the rear planetary ring gear, second clutch anchors the front planetary carrier, third clutch anchors the sun gear shaft, fourth locks the main input drive shaft to the center sun gear shaft, low clutch (five speeds only) anchors the low planetary carrier.
What are the grooves in the friction disk thought to be an advantage?
Allows the disc to store fluid to lubricate, cool and quiet clutch engagement, provide channels through which the fluid can escape and drain quickly, allow for a clean disengagement at high speeds.
What is maximum overdrive?
The carrier is rotating less than one turn input compared to one turn output, resulting in an overdrive condition.
What does Chapter 39 cover out of the Heavy duty truck systems book?
There is no chapter 39