Unit 1 Introduction to Two and Three Wheelers

4 lecture hours

• 1.1 Overview of Two and Three-Wheeler: (Definition
• History and Evolution) 1.2 Types and Application of Two and Three-Wheeler 1.3 Major manufacturers and their models 1.4 Basic technology for Electric Two and Three-Wheeler

Unit 2 Power and Transmission System

14 lecture hours

• 2.1 Types of engines used in SI and CI (2-stroke
• 4-stroke) 2.2 Difference between Valve Timing and Port Timing Diagrams 2.3 Scavenging -types
• merits and demerits 2.4 Engine cooling and lubrication systems 2.5 Fuel systems (Carburettor and Fuel Injection) 2.6 Clutch types (Single plate
• Wet multi-plate
• Centrifugal) 2.7 Gearbox (Manual and CVT) 2.8 Final drive (Chain
• Shaft drive)

Unit 3 Electrical and Auxiliary systems

12 lecture hours

• 3.1 Electronic ignition systems (Conventional (Contact point type)
• Magneto, TCI, CDI) 3.2 Starting system (Kick Start
• Electric Start (Self-start)
• Auto start) 3.3 Battery 3.4 Indicators & Lighting system 3.5 Dashboard instruments 3.6 Sensors and ECUs in modern two-wheelers

Unit 4 Steering, Suspension and Frame 9 20%

• Program Name: Diploma Engineering Level: Diploma Branch: Automobile Engineering Subject Code: DI04002061 Subject Name: Two and Three - Wheeler Technology 4.1 Steering: Handlebar (2-Wheeler)
• Handlebar/Rack-and-pinion (3- Wheeler) 4.2 Control cables and linkages (clutch
• throttle) 4.3 Suspension (telescopic
• swing arm, mono-shock
• leaf spring) 4.4 Types of frames (underbone
• cradle) 4.5 Materials used for frame 4.6 Ergonomics: Rider position and comfort for different vehicle types

Unit 5 Braking, Wheels & Tyre Systems

6 lecture hours

• 5.1 Braking: Disc brake
• Drum brake, CBS, ABS 5.2 Wheels: Spoke wheel
• Alloy wheel
• Pressed steel wheel (3W) 5.3 Tyres: Tubed and tubeless tyres
• tyre construction