Computer Aid Drafting in Computer Aid Drafting in Mechanical EngineeringMechanical Engineering

Group 1Phil Vanderwerker

Rees KeckAmy Rose

Kyle WhippleJonathan Scarpa

Anand Subramanian

14:650:388

Rutgers University School of Engineering

6 Cylinder Honda CBX Motorcycle 6 Cylinder Honda CBX Motorcycle EngineEngine

Cylinder HeadCylinder Head

Engine Block and CylindersEngine Block and Cylinders

Camshaft and GearsCamshaft and Gears

CrankshaftCrankshaft

Piston and Connecting RodPiston and Connecting Rod

Valve, Valve Springs and BucketValve, Valve Springs and Bucket

CasingCasing

Lower Crank Case

Upper Crank Case

Valve Cover

TimingTiming

Intake Stroke Compression Stroke

Power Stroke Exhaust Stroke

Gear ConnectionsGear Connections

Difficulties and ObstaclesDifficulties 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.

Difficulties and Obstacles (Cont’d)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.

Improvements and ModificationsImprovements 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.

Drag Racing VideosDrag Racing Videos

Firing Cycle AnimationFiring Cycle Animation

Assembly AnimationAssembly Animation

ReferencesReferences

-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/