 |
| line art example of a cylinder. (Photo credit: Wikipedia) |
.Basic
Engine Parts
The first basic part of an engine is the
cylinder
why so ??
to understand that we need to analyze what actually a cylinder looks from inside
here in the picture you can see what actually a cylinder looks like
the cylinder has pistons which moves up and down and is the core of the cylinder
. The engine shown here has one cylinder. That is typical of most lawn mowers, but most
cars have more than one cylinder (four, six and eight cylinders are common).
IN MULTI CYLINDER engine the engines are basically of three parts : inline, V or flat (also known as horizontally opposed or boxer),
 |
| Cylinder head of the Nissan VQ35DE engine (Photo credit: Wikipedia) |
now moving o to some other key engine
parts in more detail.
 |
| Spark plug (Photo credit: Wikipedia) |
The spark plug is the device used to provide enough spark to the mixture of gas-air to have a combustion
Valves
 |
| Outside view of the cylinder and of the valves of a side valves engine. (Photo credit: Wikipedia) |
 |
| Piston rings (Photo credit: Wikipedia) |
 |
| Piston (Photo credit: Wikipedia) |
Piston
A piston is a cylindrical
piece of metal that moves up and down inside the cylinder.
Piston rings provide a
sliding seal between the outer edge of the piston and the inner edge of the
cylinder.
now many of you must be in deep thoughts that what actually is the role of piston rings
now many of you must be in deep thoughts that what actually is the role of piston rings
- They prevent the fuel/air mixture and exhaust in the combustion chamber from leaking into the sump during compression and combustion.
- They keep oil in the sump from leaking into the combustion area, where it would be burned and lost.
- Most cars that "burn oil" and have to have a quart added every 1,000 miles are burning it because the engine is old and the rings no longer seal things properly.
Connecting rod
 |
| Components of a typical, four stroke cycle, DOHC piston engine. (E) Exhaust camshaft, (I) Intake camshaft, (S) Spark plug, (V) Valves, (P) Piston, (R) Connecting rod, (C) Crankshaft, (W) Water jacket for coolant flow. (Photo credit: Wikipedia) |
The connecting rod connects
the piston to the crankshaft. It can rotate at both ends so that its angle can
change as the piston moves and the crankshaft rotates.
Crankshaft
The crankshaft turns the
piston's up and down motion into circular motion just like a crank on a
jack-in-the-box does.
Sump
The sump surrounds the
crankshaft. It contains some amount of oil, which collects in the bottom of the
sump (the oil pan).
in the next blog we will be focussing on the basic problems we encounter in day to day life
in the next blog we will be focussing on the basic problems we encounter in day to day life
