Examining Physical Engines

Name:

Feel free to work in teams, but each individual will turn in a write-up as part of HW #2

Orientation:

Several engines are provided where you can examineengine components and their relationships, recognizing similarities and drawing distinctions between SI and CI engines. This experience will strengthen your ability to reverse engineer how engine systems function based on physical layout. Hands-on exploration with engines and their components is likely to help you construct simple thermo-fluid models in future homework assignments.

Learning Objectives:

  1. Identify major components of engines used for different applications.
  2. Understand which variables are most critical in estimating power output.
  3. Appreciate how components interact to create an engine cycle.

Targeted Skills:

Inquiring – asking key questions

Reasoning with theory – explaining data with accepted knowledge

Collaborating – working together for mutual benefit

Sharing knowledge – effectively presenting relevant facts and interpretations

Station 1: 4-stroke SI engine (Cadillac 500 CID V8)

  1. Identify the following components on the engine block
  2. Intake manifold
  3. Cylinder head
  4. Pushrods
  5. Exhaust Manifold
  6. Starter motor
  7. Flywheel
  8. Oil pan
  9. Carburetor

Station 2: Cylinder Head (Cadillac 500 CID V8)

  1. Identify the following components on the cylinder head
  2. Spark plug
  3. Intake valve
  4. Exhaust valve
  5. Combustion chamber
  1. Given a ¼” valve lift, what is the cross-sectional area for intake and exhaust
    into and out of each cylinder? Which area is larger? Why?

Station 3: 2-stroke SI engine (Homelite Chainsaw)

  1. Identify the following components
  2. Piston
  3. Intake port
  4. Exhaust port
  5. Carburetor
  6. Starter
  7. Flywheel/clutch
  8. Which ports open first? Which ports open second? Why?
  1. Will a 2-stroke engine produce twice as much power as a 4-stroke engine? Why/why not?

Station 4: Turbochargers

7.Locate the following

  • Compressor wheel
  • Turbine wheel
  • Bearings
  • Wastegate

8.What limitations surround the selection of boost pressure?

  1. How is the wastegate used to control boost pressure?

Other Items of Interest in the Vehicle Research Laboratory10. What is something interesting you learned about each the following items? YZ250 Engine

CFR Engine

Eddy Current Dynamometer

Fuel Measurement Cart

Dilution Tunnel

Flow Bench

Toyota 3S-GTE (training engine)
Waterbrake Dynamometer

Yamaha R6 (training engine)
Computer w/SAE Papers
Rotax 600cc 2-stroke cylinders (DI and SDI)