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Advanced CAD Techniques for Honda CBX Motorcycle Engine Design in Mechanical Engineering

This project explores the design challenges and solutions in drafting the Honda CBX motorcycle engine components using Computer-Aided Drafting (CAD). Issues such as measuring difficult dimensions and adjusting for machining imperfections are addressed. We focus on enhancements for drag racing, including optimizing air flow and surface area for heat dissipation. Comprehensive animations and references highlight the detailed assembly and firing cycle of the engine, providing insights into the mechanisms and engineering principles involved.

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Advanced CAD Techniques for Honda CBX Motorcycle Engine Design in Mechanical Engineering

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Presentation Transcript

  1. Computer Aid Drafting in Mechanical Engineering Group 1 Phil Vanderwerker Rees Keck Amy Rose Kyle Whipple Jonathan Scarpa Anand Subramanian 14:650:388 Rutgers University School of Engineering

  2. 6 Cylinder Honda CBX Motorcycle Engine

  3. Cylinder Head

  4. Engine Block and Cylinders

  5. Camshaft and Gears

  6. Crankshaft

  7. Piston and Connecting Rod

  8. Valve, Valve Springs and Bucket

  9. Casing Upper Crank Case Lower Crank Case Valve Cover

  10. Timing Intake Stroke Compression Stroke Power Stroke Exhaust Stroke

  11. Gear Connections

  12. Difficulties and Obstacles • Problem: Many dimensions were immeasurable because of their location, i.e. valve guides, Solution: Dimensions had to be inferred based on function and location. • Problem: Imperfections in machining meant that not all corresponding dimensions were equal. Solution: Dimensions had to be adjusted during assembly to facility function. • Problem: Establishing a cam follower connection between the cams and the buckets. Solution: Rounding the surface of the bucket left for an easier 24 connections. • Limitations of DSV lab computers made extensive cam/follower connections very difficult.

  13. Difficulties and Obstacles (Cont’d) • Not having the valve shims, it is very difficult in achieving the proper valve timing for the 4 stroke cycle.

  14. Improvements and Modifications • This engine will be used for drag racing, therefore instead of straddling the engine, the rider lays on top, eliminating the need for angled intakes. This also increases air flow into the cylinder head. • Drag racing runs an engine hot for only a few seconds. Maximizing surface area to dissipate heat on the engine is no longer needed, though we still added minimal fins to act as heat sinks.

  15. Drag Racing Videos

  16. Firing Cycle Animation

  17. Assembly Animation

  18. References • 4 Stroke Cycle. Vic High Mechanics Home Page. Grew, Mike. http://abbysenior.com/mechanics/images/4strokehtm.pdf • Motorcycle Engine Parts. Ziggys Motorworks. http://www.ziggysmotorworks.com/chief/CHIEFpwr.html • Honda CBX Drag Racing. Sproul, Mark.http://www.cbxracing.com/ • Valve Timing Tutorial. Comp Cams. http://www.compcams.com/Technical/TimingTutorial/ • Pro Engineer Forum: Mechanisms. MCAD Central.http://www.mcadcentral.com/proe/forum/

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