Engines Flashcards
converts heat energy of fuel into mechanical energy
internal combustion engine
two types of combustion engines
internal combustion engine
external combustion engine
thermal efficiency range of internal combustion engine
15% to 40%
combustion chamber of engine
cylinder
cylinder block
forms a cover on one end of the cylinder
cylinder head
transmits the force of expansion from inside the cylinder to the connecting rod and drives the crankshaft into rotary motion; designed to withstand extreme heat and pressure, usually made of cast iron and aluminum
piston
transmits the force of expansion from inside the cylinder to the connecting rod and drives the crankshaft into rotary motion; designed to withstand extreme heat and pressure, usually made of cast iron and aluminum
piston
functions as a seal against the cylinder wall
piston rings
types of piston rings
compression ring (top)
middle piston ring (middle)
oil scraper ring (bottom)
seals the gap between the piston and cylinder wall
compression ring
ensures that the combustion chamber and the crank case are segregated
compression ring
adjustment to match the required power
overhaul
combustion chamber outside the cylinder
external combustion chamber
Advantages of ICE over ECE
- more efficient
- weigh less
- more compact
- original cost per hp
- less time and work necessary preliminary to starting
- less time and attention required while in operation
- range of adaptability
receives, exert, and transmits the motive forces
power chain components
constrain and support moving parts
stationary parts components
time the operating sequence
valve system components
cool and lubricate the surfaces and provide ignition and fuel for the engine
auxiliary parts and accessories component
receives and transmits the pressure forces in the combustion chamber to the rotating crankshaft
piston
retain compression; reduce cylinder wall contact thereby reducing friction losses wear
piston rings
serves to fasten the piston to the upper end of the connecting rod; wrist pin
piston pin
transmits the power of combustion from the piston to the crankshaft
connecting rod
bearing where connecting rod fastens to crankshaft
connecting rod bearing
converts the rectilinear motion of the piston into rotation
crankshaft
inertia, keep the engine at uniform speed when the crankshaft is receiving power from the piston
flywheel
confines the expanding gases and forms the combustion chamber
cylinder
cylinder block
houses the valves and forms a cover to the cylinder
cylinder head
end of the cylinder between the head and the piston face where combustion occurs; sometimes synonymous with the term “cylinder”
combustion chamber
guiding the oil along the piston as well as into crankcase to lubricate and cool down the components
oil scraper ring
functions of engine oil
lubrication
cooling of the components
Without engine oil or oil at low level may be
detrimental to the components
open and closes the parts leading into and out of the combustion chamber
valves
