03-07-2012, 01:10 PM
Engine Parts, Description, Function, Construction
Cylinder Walls
Inside surface of cylinder barrel is _________ to a controlled amount of roughness
Rough enough to __________ but smooth enough to minimize friction and wear
Plain steel cylinder walls are not _______ to prevent wear or corrosion
Nitrided cylinder walls are _________ to reduce wear but still rust as easily as plain steel walls. Nitriding is exposing the cylinder wall to ammonia at high temperatures and it hardens the wall to a thickness of approximately .005”
Chrome cylinder walls use ______________ to resist wear and provide a corrosion resistant surface.
Cylinders may be chromed back to __________ inside dimensions if they become worn
Chrome is too smooth to hold oil without etching or channeling during the ____________________
Piston head designs
Piston rings (general)
Provide _____ between cylinder wall and piston
Rings ride on a thin film of oil
Conduct ______ from the piston out to the cylinder and the fins
Material is ___________ or chrome steel
Piston rings (type)
____________________ are located at the top of the piston and seal the combustion chamber
Types include rectangular, tapered,wedge
Oil _____________________
On bottom of piston below compression rings
Regulates oil film ___________ on cylinder wall
Holes in ring and piston allow excess oil to drain back to crankcase
Too much ________ and the engine will use excessive oil and too little oil causes heat and insufficient lubrication
Oil ___________________
Directs the oil away from or towards the oil control rings depending upon the requirements of the engine