above is an image the machine using the mechanism of valve OHV
(Over Head Valve), and one is a camshaft drive which consists of
other timing chain and timing gear direct use. machine with such
a mechanism is usually much found on a machine that still uses a
carburetor fuel system and still use a connecting push rod to
move the trigger valve (rocker arm).
The mechanical flow of OHV is as shown in Figure 2.
System like this is not efective, because so many using
mechanical circuit to open and close the valve so that
generated a lot of grit on a power loss working machine.
Not only is the resulting loss in engine friction, such
a system It also can not achieve the high rpm because the
level accuracy of the lid Valve (valve) is very small which
also caused by amount cavities of the valve drive starts
to crank Saft valve.
See more about Overhead Camshaft dan Automatic Transmision Clutch
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