4-5
CAMSHAFT
Models
EY3S-B,
3S-BS,
EY40-B
and
40-BS
have intake
and
exhaust cams
of
forged carbon steel, which are fitted with
a
cam gear under pressure. The assembly serves as output shaft
that
is
driven at one
half
the speed of the crankshaft.
The
cam gear has a governor fitted
to
it.
Model EY35-D,
35-DS,
EY40-D
and
40-DS
have a camshaft
of
special cast iron, which is integrally assembled with a cam
gear. The two ends of the shaft serve as plain bearings
so
no
ball bearings are used.
(See
Fig.
6.)
4-6
CYLINDER HEAD
The cylinder head
is
an
aluminum
die
casting,
and
forms a
Ricardo type combustion chamber with ample area
for
high
combustion effeciency. The spark plug is tilted for easy
mounting of the fuel tank.
(See
Fig.
7.)
0
Fig.
6
Fig.
7
4-7
VALVE ARRANGEMENT
.
"
. ".
.._
_.
The exhaust valve is located upstream of the cooling air with
the
result that the exhaust valve is intensively cooled
for
improved engine durability. The inner side
of
the valve head
is reinforced with hard alloy fused
to
it
for
added durability.
(See
Fig.
8.)
Fig.
8
-6-
To Next Page
Loading...
Need help?
General
