1
ENGINE
(2) Cylinder Head
0109F014
0087F009
0087F010
(3) Crankshaft
GJ
(A)
81700·82100'82400 WSM,11770
The
cross-flow type intake/exhaust ports in this
engine have
their
openings
at
both
sides
of
the
cylinder head.
Because
overlaps
of
intake/exhaust
ports are smaller than in ports
of
other types which
have openings on one side, the suction
air
can
be
protected
from
bei ng heated and expanded by
heated exhaust air.
The
cool, high density suction air
has
high volume efficiency and
raises
the power
of
the engine. Furthermore, distortion
of
the cylinder
head by heated exhaust
gas
is
reduced because
intake
ports
are
arranged
alternately.
The
combustion chamber
is
of
KUBOTA's
exclusive
E-
TVCS
combustion chamber type. Suction air
is
whirled
to
be
mixed
effectively
with
fuel,
prompting
combustion and reducing fuel consumption.
In
the combustion chamber are installed
throttle
type injection nozzle and rapid heating sheathed
type
glow
plug.
This
glow
plug
assures
easier than
ever engine starts even at -15°C
(5°F).
(1) Combustion Chamber
(2) Intake Port
(3) Exhaust Port
(4) Nozzle
Assem
bly
(5) Glow Plug
(6) Cylinder Head
(7) Depression
(8) Compressed
Air
, [Al Connect
to
Combustion Chamber
0343F104
The
crankshaft
with
the connecting rod converts
the
reciprocating
motion
of
the
piston
into
the
rotating motion.
The
crankshaft
is
made
of
tough special alloy steel,
and the journals, pins and oil
seal
sliding portions are
induction
hardened
to
increase
the
hardness
for
higher wear resistance.
The
front
journal
is
supported by a solid
type
bearing, the intermediate journal
by
a split type, and
the rear journal
by
a split type
with
thrust bearings.
The
crankshaft
is
provided
with
an oil gallery,
through
which engine oil
is
fed
to
the
crankpin
portion, and lubricate it.
1-M2
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