Easy step by step guide on how an automotive internal combustion engines work,
though appearances may vary to concept is the same for most engine.
Engine's are designed to have any number of cylinders and are created in all
sizes. The pistons are designed to fire consecutively to rotate the crankshaft inside
the engine block. Motor oil is used to cool and lubricate internal engine parts
including the crankshaft, camshaft, cylinders, pistons, piston rings, wrist pin,
lifters, rock arm, followers, intake and exhaust valves, timing gears and chain.
The oil then travels back into the oil pan creating a re-circulation system. The
oil pump determines the amount of oil pressure the engine will have via a pressure
spring fitted into a relief valve of the pump.
There are primarily two styles of valve train systems, "overhead cam" which consists
of a camshaft mounted on top of the cylinder head, and "in block" systems
which consist of a camshaft mounted inside the engine block, designs to perform
this action will vary depending manufacturer. The cylinder head is bolted to the
engine block using a gasket to seal the engine parts together.
An engine's power output rating is known as horsepower, which has been rated
differently in the past. A more standardized system is used today. Acceleration
is the process of changing the rate of velocity or movement of a vehicle, when a
turbocharger or supercharger accompanies
the engine, it increases the rate of acceleration by increasing horsepower.
The compression ratio of an engine is the measurement of how many times the volume
of the combustion chamber can be fitted into the cylinder when the piston is at
the bottom of its stroke. The compression ratio determines the octane required for
optimum performance and dictates the rate in which fuel that can be compressed without
If self ignition does occur, its represented by an engine "ping"
or "knock" sound. Manufacturers create automobiles with improved horsepower and
lighter, stronger construction. This combination improves vehicle performance with
increased mileage. The measurement of horsepower has been successfully used to motivate
Step 1 - An internal combustion engine is designed
to compress and use combustion of a fuel air mixture.