MAT 101 DrG flashcard 9. Engine displacement and Compression ratio

Front

What is engine displacement?

Back

Engine displacement is the total volume of all the cylinders in an engine, typically measured in liters or cubic inches. It indicates the engine's size and capacity.

Front

How is engine displacement calculated?

Back

Engine displacement can be calculated using the formula: Displacement = π × (bore/2)² × stroke × number of cylinders.

Front

What is the formula for the volume of a cylinder?

Back

The volume of a cylinder is calculated using the formula: Volume = π × (radius)² × height.

Front

What is the bore of an engine?

Back

The bore is the diameter of the engine's cylinders, which affects the engine's displacement and power output.

Front

What is stroke in an engine?

Back

Stroke is the distance the piston travels within the cylinder from the top to the bottom, affecting the engine's displacement.

Front

What is the compression ratio?

Back

The compression ratio is the ratio of the maximum to minimum volume in the cylinder, indicating how much the air-fuel mixture is compressed before ignition.

Front

How does increasing the bore affect engine performance?

Back

Increasing the bore allows for a larger volume of air-fuel mixture, potentially increasing power output and efficiency.

Front

How does increasing the stroke affect engine performance?

Back

Increasing the stroke increases the engine's displacement, which can enhance torque and power at lower RPMs.

Front

What is the relationship between engine displacement and power?

Back

Generally, a larger engine displacement can produce more power, but efficiency and design also play crucial roles.

Front

Calculate the engine displacement for a 4-cylinder engine with a bore of 4 inches and a stroke of 3 inches.

Back

Displacement = π × (4/2)² × 3 × 4 = 151 cubic inches.