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Fluid Couplings and Torque Converters

Fluid Couplings and Torque Converters. Chapter 5 Classroom Manual. Introduction. Engine and Transmission needs to be automatically coupled and uncoupled Uses Torque Converter to multiply torque and transmit power Components Impeller Turbine Stator. Fluid Coupling .

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Fluid Couplings and Torque Converters

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  1. Fluid Couplings andTorque Converters Chapter 5 Classroom Manual

  2. Introduction • Engine and Transmission needs to be automatically coupled and uncoupled • Uses Torque Converter to multiply torque and transmit power • Components • Impeller • Turbine • Stator

  3. Fluid Coupling Fluid travels either in a rotary or vortex motion

  4. Impeller turns Tubine Turbine Impeller

  5. Fluid drives turbine at an angle

  6. Difference in speed creates a turbulence

  7. Components • Flexplate drives T.C. • Torque Converter Hub drives oil pump • Impeller drives Turbine • Turbine drives input shaft • Input shaft drives Clutch Hub

  8. Vanes are curved to accelerate fluid flow

  9. Rear Wheel Drive • Input shaft directly connects to turbine with splines • Input shaft is usually hollow for lock up operation

  10. Front Wheel Drive Turbine Shaft drives Input Shaft

  11. Stator Operation • Stator assembly mounts on One-way clutch. • Stator multiplies torque • At 90% speed ratio, the stator • rotates same speed as turbine • and impeller and “coupling phase” • occurs. Pg 90C

  12. Early Converter were repairable • Older converters had drains

  13. One Way Clutch

  14. Chrysler TCC Release pressure disengages clutch plate Venting pressure causes lock up Page 94C

  15. Ford Lock Up Clutch Piston hub splines directly to the turbine

  16. GM TCC First used in 1980, Applied by TCC Solenoid

  17. Vane curvature controls amount of multiplication

  18. Converter Operation • Stator redirects fluid back into impeller to multiply force • More torque happens at lower rpms. • At higher rpm, components equalize

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