4 Stroke Cycle
Engine Mechanicals
Laws
Science
Are you efficient
100
First stroke the piston takes in the 4 stroke process. When the piston is traveling downwards,the intake valve is open allowing the cylinder to fill with air.
What is Intake Stroke
100
The distance a piston travels from top dead center to bottom dead center is known as the piston what?
What is Stroke
100
A moving object will travel in a straight line and in one direction
What is Newton's Second Law
100
Energy of motion
What is Kinetic Energy
100
The fraction of the indicated horsepower delivered at the crankshaft
What is Mechanical Efficiency
200
As the piston nears bottom dead center, the exhaust valve, operated by a camshaft lobe, begins to open. The piston begins to rise , forcing thespent gasses past the exhaust valve and out of the cylinder. This is known as which one of the four strokes?
What is Exhaust Stroke
200
A twisting or turning force measured in pound-feet(lb/ft)
What is Torque
200
This unchanging action, assuming that there is no outside force acting on or against an object, is called what?
What is Inertia
200
The absence of pressure, or lower pressure than atmospheric pressure
What is Vacuum
200
When you climb above sea level, this decreases
What is Atmospheric Pressure
300
The turning crankshaft now forces the piston upwards. Both valves are closed; there is no way for the air fuel mixture to get out. The volume in the cylinder is decreasing as the piston rises, so air is compressed.
What is Compression stroke.
300
The volume of the cylinder at the beginning of the compression stroke(BDC) divided by the volume of the cylinder at the end of the compression stroke(TDC)
What is Compression Ratio
300
An object at rest tends to stay at rest and an object in motion tends to stay in motion
What is Newton's First Law
300
Energy at rest
What is Potential Energy
300
The percentage of the fuel supplied heat energy that appears at the crankshaft as work
What is Thermal Efficiency
400
High pressures from the burning of the fuel and air in the cylinder force the piston down the bore, which causes the crankshaft to rotate.
What is Power Stroke
400
The diameter of a cylinder in an engine
What is Bore
400
Air in aconfined space will compress, however, liquid in a confined space will not compress. When pressure is applied to a liquid in a confined space, the pressure is transferred equally in all directions.
What is Pascal's Law
400
The ability to do work
What is Energy
400
A 1 inch piston being pushed 1 inch with 100 lbs of force, will push a 2 inch piston 1/2 inch in distance but will put out how much force?
What is 200 lbs
500
The piston at the very top and very bottom of its travel are known as what?
What is Top dead center and Bottom dead center
500
The total volume of space inside the cylinders occupied and the evacuated by all of the pistons in an engine.
What is Displacement
500
For every action there is an equal and opposite reaction
What is Newton's Third Law
500
The 3 necessary ingredients needed for combustion
What is Air, Fuel, Ignition
500
The ratio of the weight of air actually entering the cylinder, compared to the weight of air that could enter the cylinder
What is Volumetric Efficiency