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General Info- Identifying engines

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General Info- Identifying engines

Post by LhYnxz on Fri May 02, 2008 6:42 pm

Summary
Multi-cylinder engines are produced in four common configurations. They are: Inline, "Vee", Horizontally Opposed, Rotary.


Multi-cylinder engines are produced in four common configurations. They are:


  • Inline
  • "Vee"
  • Horizontally Opposed
  • Rotary


Inline

Inline
engines can be found in 2, 3, 4, 5, and 6 cylinder configurations.
There have been inline 8 cylinder engines, but they are too long to fit
into an engine bay of a conventional modern car.
Cylinders
arranged side by side in a single row identify the 'Inline' engine.
They can be mounted longitudinally (lengthwise) or transversely
(sideways) in the engine bay. However, it is uncommon to find a longer
6-cylinder engine mounted transversely.


Vee

"Vee"
engines are shorter than an equivalent capacity inline engine. They can
be found in 2, 4, 6, 8, 10 and 12 cylinder configurations and consist
of two banks of cylinders arranged in a Vee that is joined at the
bottom. They are shorter than inline engines, because offsetting the
wider top parts of alternate cylinders into the different arms of the
Vee allows them to be connected closer together at the crankshaft.
Vee
engines can be mounted longitudinally (lengthwise) or transversely
(sideways) in the engine bay. A V6 will have two banks of 3 cylinders,
a V8 two banks of 4 cylinders.
The angle of the "Vee" varies
according to the number of cylinders. The natural angle for a V4 and V8
is 90. The natural angle for a V6 and V12 is 60 and for a V10 is 72.
Some manufacturers vary their angles due to convenience or design
requirements. Some manufacturers use 90 and 15 V6s


Horizontally opposed

Horizontally
opposed engines are commonly found in 2, 4, 6, and 12 cylinder
configurations. Like a "Vee" engine, they have two banks, but in this
case they are 180 apart. Unlike "Vee" engines their crankshaft differs
in the way the pistons are paired. A Horizontally Opposed engine is
only fitted longitudinally.


Rotary

Rotary
engines are very powerful for their size, but they do not use
conventional pistons that slide back and forth inside a straight
cylinder. Instead, a rotary engine uses a rotor which has three convex
sides, attached to an eccentric shaft inside a specially shaped
housing. As the rotor rotates, it covers and uncovers inlet and exhaust
ports, and its curved shape alters the size of the working chambers,
which are formed in the spaces between the outside of the rotor and the
inside of the housing. For each complete rotation of the rotor, there
are three power pulses, and three rotations of the shaft.

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