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1- Engine Types and Their Operation
There are many different types of internel combustion engines. They can be classified by :
1 - Application :
Automobiles , truck , locomotive , light aircaft ,marine , portable power system , power generation
2 - Engine design:
Reciprocating engines which in turn subdivided by arrangement of cylinders for examples:
2-1 Single cylinder engine :
2-2 In-line cylinder engine :
2-3 Vee in-line engine :
* Single cylinder engines have several advantages :
1 - It's simple design .
2 - economical construction .
3 - Balance shafts and counterweights on the
crankshaft must be used to balance the weight
of reciprocating parts.
- The first inline six was produced by Napier and Sons in 1904.
- The Straight-6 is smoother than engines with a fewer
number of cylinders because the power strokes of
pistons partially overlap.
- Since each power stroke lasts 180 degree of Crankshaft
rotation,while a new piston starts its power stroke every
120 degrees, there are 60 degrees of overlap on each
stroke in which one piston is finishing while the next
is starting .
- in line arrangement is the most common for Automobile
engine up to about 2.5 lite displacement.
- The V arrangement , with two banks of cylinders provides a compact block and is used extensivlely for larger displacment engines.
-The V arrangement ,with two banks of cylinders provides a smooth , low vibration .
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