M.l
ENGINE BODY
68 mm
STROKE
SERIES
WSM,
01
160
a
ENGINE
BODY
[I]
CYLINDER BLOCK
[2]
CYLINDER HEAD
11 09F014
29
3087F009
60
D087F010
The engine has
a
high durability tunnel-type
cylinder block
in
which
the
crank bearing component
is
a
constructed body. Furthermore, liner
less
type,
allow effective cooling,
less
distortion, and greater
wear-resistance.
The noise
level
is
reduced to
a
minimum because each cylinder has
its
own chamber.
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 being 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 New
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 Assembly
(5)
Glow
Plug
(6) Cylinder Head
(7) Fan-shaped Concave
(8)
Stream
(9)
Air Inlet
Combustion System
These
engine use the "NTVCS" (New Three Vortex
Combustion System) to achieve perfect combustion
for maximum power. The
NTVCS
combustion system
provides unique shape of throat
in
the
air inlet
(9)
for
combustion chamber, to produce three streams
(8)
of
air
in
the
chamber
(1)
when compressing, giving
an
ideal mixture
of
air and fuel.
In addition,
a
fan-shaped concave
(7)
is
provided
on top of
the
piston to allow
a
smooth ejection of
the
exhaust gas, offering highly efficient
com bustion.
M-3
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