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Welcome to. AfterSales Training. R105. Electro Mechanical Continuously Variable Transmission (Em-CVT) Type Instructor Name Here. Introduction. Your Name Your Dealership Previous Training Courses or Past Experience Hobbies and Interests Did You Ask to Come on This Course

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  1. Welcome to AfterSalesTraining

  2. R105 Electro Mechanical Continuously Variable Transmission (Em-CVT) Type Instructor Name Here

  3. Introduction • Your Name • Your Dealership • Previous Training Courses or Past Experience • Hobbies and Interests • Did You Ask to Come on This Course • What Do You Hope to Gain From This Course

  4. Comfort & Convenience • Coffee Breaks • Lunch Arrangements • Telephones • Messages • Start & Finish Times • Toilets • Smoking Policy • Fire Precautions

  5. Introduction • Course Code : R105 • Course Title : Em-CVT • Course Duration : 1 Day

  6. Course Aim : - Introduction To Ensure All Delegates Are Familiar With the Components, Structure and Operation of the Em-CVT Gearbox

  7. Course Objective : - At the End of This Course With the Aid of Support Material, the Delegates Will Be Familiar With the Operation, Location & Functionality of the Em-CVT Gearbox and Interfaces and Be Able to Diagnose the Em-CVT Systems Using the Latest Diagnostic Equipment.

  8. Introduction Course Content : • Exercises in Fault Diagnosis • Fault Code Retrieval • Vehicle Repair Procedures • A Detailed Insight into all Em-CVT Components, Their Function & Location.

  9. Continuously Variable Transmission • Origins Date Back to 1974 • Rubber Drive Belt Construction External to Gearbox • Replaced by a Steel Belt Internal to Gearbox Unit

  10. EM – CVT Stepspeed

  11. EM-CVT Advantages • Low Engine Revolutions at Constant Vehicle Speeds • Improved Emission Control • Low Noise, Vibration and Harshness Levels • Smooth Acceleration • Flexible Mountain Driving

  12. Models Available MGF & MG TF • 1.8i K – Series 16 valve Rover 25/MG ZR • 1.6i K – Series 16 valve • 1.8i K – Series 16 valve Rover 45/MG ZS • 1.6i K – Series 16 valve • 1.8i K – Series 16 valve

  13. Operation Primary Pulley Secondary Pulley

  14. Planetary Gear Set Multiple Clutches Primary Pulley Steel Drive Belt Secondary Pulley Pinion Shaft Differential Unit Mechanical Layout – Group One Elements Providing Torque Flow Through the Transmission

  15. Mechanical Layout - Group Two Elements Relate to the Hydraulic System According to Load and Driver Conditions • Hydraulic Pump • Hydraulic Control Unit

  16. Selector Mechanism Speedometer Steering Wheel Switches MGF & TF Only Ratio Control Motor Oil Cooler Connections Park/Neutral Switch Mechanical Layout – Group Three Elements That Have External Connections From the Transmission

  17. Group One Torque Flow

  18. Torsional Vibration Damper

  19. Torsional Vibration Damper • Replaces Torque Converter Used by Conventional Automatic Transmission • Engine Power Connected to Input Shaft of the Transmission Via Torsional Damper • Splined to Input Shaft of Transmission • Bolted to “Drive Plate” on Engine

  20. Planetary Gear Set

  21. Planetary Gear Set • Planetary Gear Set Provides Drive Torque in Two Directions – Forward & Reverse • Engine Torque Always Enters Transmission Via Planet Carrier Through Input Shaft

  22. Forward & Reverse Clutches

  23. Clutch Packs

  24. Clutches • Two Multiplate Clutch Packs - One Forward One Reverse • Forward Clutch Operates and Epicyclical Gear Set Operates As One Unit – Forward Drive

  25. Forward Clutch Applied

  26. Clutches • Reverse Clutch Operates • Annulus of the Planetary Gear Set Is Held Stationary • Three Pairs of Planet Gears Driven by Planet Carrier Forcing Sun Wheel to Operate in Opposite Direction – Reverse Drive

  27. Reverse Clutch Applied

  28. Park/Neutral

  29. Primary Pulley

  30. Secondary Pulley

  31. Pulleys • Each Pulley Consists of One Fixed Half and One Axially Mobile Half Both Having 11º Angles • Distance Between Primary and Secondary Pulleys 155mm

  32. Drive Belt

  33. Drive Belt • Van Doorne “Push” Type Belt 24mm Wide • Drive Belt Consists of 450 Segments (VT1 CVT Had 350 Segments) • Drive Belt Held Together by 24 Steel Bands – 12 Per Side

  34. Belt Construction

  35. Differential & Pinion Shaft

  36. Layout

  37. Group Two Hydraulics

  38. Hydraulic Control System Functions • To Match the Belt Tension With Engine Torque to Prevent Belt Slip • To Control the Operation of the Forward & Reverse Clutches at Take off and Also Driving • To Provide Optimum Ratio for All Driving Conditions

  39. Oil Pump

  40. Oil Pump • Oil Pump Housed Within the Transmission Case • Pump Shaft Splined and Driven by Planet Carrier • Always Runs at Engine Speed

  41. Oil Pump • Oil Pressure Used for Controlling Both Transmission Hydraulically and for Lubrication Purposes • Oil Cooler Stabilises Temperature at 80ºc - 120ºc • Operates at 40 Bar (588 Psi)

  42. Hydraulic Control Unit

  43. Hydraulic Control Unit Controls the Pulleys and Clutches • Primary Pressure Supplied to Primary Pulley to Control Ratio for All Driving Conditions • Secondary Pressure Supplied to Secondary Pulley to Ensure That There Is Always Adequate Clamping Force • Selection of Correct Clutch – Forward or Reverse

  44. Primary Valve Secondary Valve Accumulator Valve Throttle Valve Pilot Valve Clutch Valve Safety Valve Cooler/Lock up Valve Manual Valve Hydraulic Control Unit Contents

  45. Valve Body Inputs

  46. 3 1 2 Primary Valve A Secondary Pressure B Primary Pitot Pressure C Primary Pressure D Return to Sump 1 Ratio Control Motor 2 Cap 3 Valve

  47. Secondary Valve 2 A Secondary Pressure B Throttle Pressure C Clutch Pressure D Engine Pitot Pressure 1 Sensing Shoe 2 Valve 1

  48. Sensing Shoe

  49. Hydraulic Control System

  50. Group Three External Connections

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