16-01-2013, 02:09 PM
4 Stroke Engine cycle
4 Stroke Engine cycle.ppt (Size: 4.33 MB / Downloads: 111)
Engine displacement
A cylinders displacement is the volume of the cylinder when the piston is at BDC.
It is the sum of the displacement of each cylinder.
It is defined as the volume of air/fuel mixture an engine can draw in.
Torque
Torque is the term used to describe a rotating force.
More torque generally means a car can accelerate faster
Torque is the actual reading of how “hard” and with how much “Force” the engine turns.
Horsepower
Horsepower: 1 hp = 33,000 lb-ft / min
One horsepower is the ability to lift 33000 pounds one foot in one minute
The horsepower specification for an engine tells you how much power the engine can produce.
Horsepower is the rate at which the engine does work
Torque and Horsepower
Think about:
Torque being how hard you can pound away on bicycle pedals
Horsepower being how fast you can spin the bicycle pedals.
Piston, connecting rod, crankshaft
Is a can-shaped part closely fitted inside the cylinder.
Piston rings consist of compression rings and oil rings.
Crankshaft takes the up-down motion of the piston and convertors it to a rotation motion
Connecting rod connects the piston to the crankshaft.