“Getting the Power to the Pavement” Module 2: Power Train Eric Klang The Rock 2005 “Getting the Power to the Pavement” MAE 442 – Automotive Engineering 2006

Vehicle Layout MAE 442 – Automotive Engineering 2006 Rear engine / rear wheel drive Mid engine / four wheel drive Front engine / front wheel drive Front engine / rear wheel drive MAE 442 – Automotive Engineering 2006

Drive Train Outline 2.1 Couplers 2.2 Transmissions 2.3 Differentials 2.4 Bearings 2.5 Axels 2.6 Brakes Grease Fitting Locations MAE 442 – Automotive Engineering 2006

2.1 Couplers MAE 442 – Automotive Engineering 2006

2.1 Couplers Needs: Solutions: Start and Stop Shift gears Mechanical Coupler (clutch) Fluid Coupler (torque converter) Electrical Coupler (generator) MAE 442 – Automotive Engineering 2006

2.1.1 Clutches MAE 442 – Automotive Engineering 2006

2.1.1 Clutches MAE 442 – Automotive Engineering 2006

2.1.1 Clutch Operation Eric Klang Eric Klang Engine Disengaged With Transmission Clutch pedal in Eric Klang Engine Engaged With Transmission Clutch pedal out Eric Klang MAE 442 – Automotive Engineering 2006

2.1.1 Clutches MAE 442 – Automotive Engineering 2006

2.1.1 Clutches Torque equations for clutches d D F = spring force (normal to surface) m = friction coefficient N = number of surfaces (= 2 for most cars) Torque equations for clutches MAE 442 – Automotive Engineering 2006

2.1.1 Clutches MAE 442 – Automotive Engineering 2006

2.1.1 Clutch References http://auto.howstuffworks.com/clutch.htm Automotive Engineering Fundamentals MAE 442 Student Projects: Automotive Clutches Clutch Assembly MAE 442 – Automotive Engineering 2006

2.1.2 Torque Converters MAE 442 – Automotive Engineering 2006

2.1.2 Torque Converters Turbine, Stator and Pump MAE 442 – Automotive Engineering 2006

2.1.2 Torque Converters Turbine (driven) Pump (driver) Stator MAE 442 – Automotive Engineering 2006

2.1.2 Torque Converters References http://auto.howstuffworks.com/torque-converter.htm Automotive Engineering 2006 Fundamentals MAE 442 Student Projects: None Yet MAE 442 – Automotive Engineering 2006

2.2 Transmissions MAE 442 – Automotive Engineering 2006

2.2 Transmission Outline 2.2.1 Gears 2.2.2 Manual Transmissions 2.2.3 Automatic Transmissions 2.2.4 CVT’s MAE 442 – Automotive Engineering 2006

2.2.1 Gears Spur Rack and pinion Internal Helical Herringbone Bevel Miter Worm MAE 442 – Automotive Engineering 2006

2.2.1 Gear Ratio Small = Pinion Large = Gear Input vs. Output GR = dout /din MAE 442 – Automotive Engineering 2006

2.2.1 Gear Terminology MAE 442 – Automotive Engineering 2006

Note: dout /din = Nout /Nin = GR 2.2.1 Gear Terminology Pitch = N/d N = Number of Teeth d = Diameter of Pitch Circle Pressure Angle Through Pitch Point Tangent to Base Circle Gears mesh if Pitch and Pressure Angle match Note: dout /din = Nout /Nin = GR MAE 442 – Automotive Engineering 2006

2.2.1 Gear Pressure Angle Lower angle = more efficiency Higher angle = more clearance 20o & 25o standard MAE 442 – Automotive Engineering 2006

2.2.1 Gear Animations gear_teeth_contact.mov involute_curve.mov spur_gear.mov helical_gears.mov bevel_gears.mov worm_gears.mov herringbone_gears.mov MAE 442 – Automotive Engineering 2006

2.2.2 Manual Transmissions Jetta Transmission Removal Real World Theoretical World Real World Jetta Transmission Removal MAE 442 – Automotive Engineering 2006

2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

2.2.2 Manual Transmissions MAE 442 – Automotive Engineering 2006

2.2.2 Synchronizers MAE 442 – Automotive Engineering 2006

2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

2.2.3 Automatic Transmissions MAE 442 – Automotive Engineering 2006

2.2.4 CVT References CVT.ppt CVT Project.pdf MAE 442 – Automotive Engineering 2006

Homework 2.1 Problem 6 MAE 442 – Automotive Engineering 2006