Internal Combustion Engine

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Internal Combustion Engine Valve Trains
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Objective -To help develop a basic
understanding of valve
trains Valve trains -A fundamental element
of internal combustion engines -Allow the
combustion chamber of a piston engine to be
opened and closed
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Basic Components -Valves -Cam shaft -Push
rods -Rocker Arms
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Types of Valve Trains Pushrod -Cam shaft found
within the engine block -Cam shaft
lifts pushrods ?which lift
the rocker arms? which lift the valves Overhead
cam -Cam found in the cylinder head
-Cam shaft lifts rocker arms
?which lift the valves
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Pros and Cons -A major goal of car manufactures
is to get better gas mileage. -Pushrod engines
are generally large displacement, low performance
-Make most of their power at low RPM -Overhead
cam engines are much more efficient -Capable of
higher RPM Reference http//abbysenior.co
m/mechanics/valve.htm