Any type of engine or machine which derives
heat energy from the combustion of fuel or
any other source and converts this energy
into mechanical work is termed as a “heat
In an IC engine, the cylinder head sits atop
the cylinders and consists of a platform
containing part of the combustion chamber
and the location of the valves and spark
The spark plug ignites the air/fuel mixture
inside the cylinder.
This occurs when high voltage, triggered at
precisely the right instant, bridges the gap
between the center and the ground
electrodes. The end result is an even burning
of the air/fuel mixture inside the cylinder..
The rocker arm is a reciprocating lever that
conveys radialinformation from the cam lobe
into linear information at the poppet valve to
open it. One end is raised and lowered by the
rotating lobes of the camshaft (either directly or
via a lifter (tappet) and pushrod) while the other
end acts on the valve stem.
The circular housing that the piston moves in
when the Cylinder is not an integral part of
the block. Also known as a "Sleeve”.
The cylinder block or engine block is a
machined casting (or sometimes an
assembly of modules) containing cylindrically
bored holes for the pistons of a multi-cylinder
reciprocating internal combustion engine.
A piston is a component of reciprocating
engines, pumps andgas compressors. It is
located in a cylinder and is made gas-tight by
piston rings. In an engine, its purpose is to
transferforce from expanding gas in the cylinder
to the crankshaft via apiston rod and/or
In a reciprocating piston engine, the
connecting rod or conrod connects the piston
to the crank or crankshaft.The small end
attaches to the piston pin.The big end
connects to the bearing journal on the crank
throw, running on replaceable bearing shells.
Sometimes casually abbreviated to crank, is the
part of an engine which translates reciprocating
linear piston motion into rotation. To convert the
reciprocating motion into rotation, the crankshaft
has "crank throws" or "crankpins", additional
bearing surfaces whose axis is offset from that
of the crank, to which the "big ends" of the
connecting rods from each cylinder attach.
A flywheel is a rotating disc used as a storage
device for kinetic energy. Flywheels resist
changes in their rotational speed, which helps
steady the rotation of the shaft when a
fluctuating torque is exerted on it by its power
source such as a piston-based (reciprocating)
The sump surrounds the crankshaft. It
contains some amount of oil, which collecting
the bottom of the sump (the oil pan).