Lab_07__Blocks_Cranks_and_Pistons_

Lab_07__Blocks_Cranks_and_Pistons_ - BSE 2484 Lab 7...

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BSE 2484 Lab 7 (Blocks, Cranks & Pistons) STATION # 1 (Cylinder Block) Observe the engine block at this station. Which type of cylinder arrangement does this engine have? Blank # 1 Is this engine air cooled or liquid cooled? Blank # 2 What type of valve arrangement does this engine have? Blank # 3 Typical liquid cooled engine, note the water jacket Typical air cooled cylinder, note the to circulate coolant around the cylinders. cooling fins for heat exchange.
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BSE 2484 Lab 7 (Blocks, Cranks & Pistons) STATION # 2 (Cylinders & Sleeves) Observe the cylinders at this station. What type of cylinder is # 1 (two or four stroke and state if it is the wet or dry type) Blank # 4 What type of cooling does cylinder # 2 require? Blank # 5 Two & Four Stroke Engines Unlike four stoke engines two stoke types such as a Detroit Diesel, will have intake ports machined into them near the bottom of the piston travel. These ports allow the intake air charge into the cylinder when the piston is at bottom dead center. Wet & Dry Sleeve Engines Wet sleeves have seals at the top and bottom to keep the coolant in the water jacket. Dry sleeve cylinders generally have thinner wall construction and lack the coolant seals of the wet sleeve type. Air Cooled Cylinders Air cooled cylinders can be identified by their characteristic cooling fins which increase the surface area of the cylinder for better heat exchange.
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BSE 2484 Lab 7 (Blocks, Cranks & Pistons) STATION # 3 (Cylinders & Sleeves) Observe the cylinders at this station. Which cylinder is the wet type? Blank # 6 How can you tell the difference between a wet sleeve and a dry sleeve? Blank # 7
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BSE 2484 Lab 7 (Blocks, Cranks & Pistons) STATION # 4 (Pistons) Pistons: The functions of pistons: Receives the force of combustion Transmits this force to the crankshaft Carries the piston rings which seal and wipe the cylinder The design of a piston’s head will effect the compression ratio of the engine by increasing or decreasing the clearance volume. Assume all other factors, such as combustion chamber volume and cylinder
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This note was uploaded on 03/31/2008 for the course BSE 2484 taught by Professor Dhvaughan during the Spring '08 term at Virginia Tech.

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Lab_07__Blocks_Cranks_and_Pistons_ - BSE 2484 Lab 7...

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