MECHANICAL
DECOMPRESSOR
During Engine Operation
Function Figure
7-1
2
The mechanical decompressor is mounted over the During engine operation, the centrifugal force that
is
exhaust cam on the camshaft to decrease the com- applied to the weight increases to turn the release
pression pressure by opening the exhaust valve in lever
so
that the crescent cam goes down below the
the latter half of the compression stroke 'of the working force of the exhaust cam, turning the
engine. Which in turn makes it easier to start the decompressor
off.
engine.
F
Starting
the
Engine
Figure
7-1
1
With the weight itself, larger than the centrifugal
force obtained by starting the engine, the crescent
cam projects from the peak of the exhaust cam
to
push the tappet up. Which in turn opens the exhaust
valve to decrease the pressure in starting the
engine.
CRESCENT
1-
TAPPET
Figure
7-1
1.
1
74
To Next Page
Loading...
Need help?
General
