Four-stroke cycle Flashcards
To help prepare for the quiz on Friday.
What is the cylinder and the function?
Hole in block.
Function: contain burning air/fuel mixture
What is the piston and the function?
Metal plug and fits inside cylinder.
Function: Convert pressure of burning air/fuel into concentrated force
What is the connecting rod and the function?
Metal bar.
Function: transfer force from piston to crank.
What is the crank and the function?
Funny shaped metal things.
Function: Up & down to round & round: linear motion to circular motion.
What is the spark plug and the function?
Cylinder of ceramic material holding a metal hook.
Function: Creates spark to ignite/fuel mixture.
What is the intake port and the function?
Opening (hole) in head of engine.
Function: Direct air/fuel into the cylinder.
What is the intake valve and the function?
Big metal golf tee: bigger than the exhaust valve.
Function: Control flow of air/fuel
What is the exhaust port and the function?
Hole in side of engine head.
Function: direct combustion…products outside engine channel.
What is the exhaust valve and the function?
Big metal golf tee: smaller than intake valve.
Function: Control flow through exhaust port.
What are the four parts of the 4 Stroke Cycle?
I. Induction Stroke
II. Combustion Stroke
III. Power Stroke
IV. Exhaust Stroke
What happens in the Induction Stroke?
Piston moves down, sucking in air/fuel mixture; the intake valve is open, the exhaust valve is closed, and the spark plug is off.
What happens in the Compression Stroke?
The inlet valve closes and the piston moves up and the mixture is compressed.
What happens in the Power Stroke?
Piston moves down and spark plug is on which causes the fuel to ignite.
What happens in the Exhaust Stroke?
The piston rises which causes the outlet valve opens and the pressure pushes exhaust gases out.
What is Cam and the function?
Metal lobe looking things.
Function: open and close the intake and exhaust valves in time with the motion of the piston.
