B2410
•
B2710
•
B2910
WSM,
12271
1 ENGINE
(5) Injection Nozzle
Retaining
Nut
Nozzle
Body
Needle
Valve
Heat
Seal
Gasket
(6)
(7)
(8)
(9)
(10)
This nozzle
is
of a flat cut provided double throttle
type. This type of nozzle
is
designed to control the
injection quantity when the lift rate
is
low at start of the
injection, and to cut down
on
the knocking sound caused
by
excessive fuel injection by giving the needle valve
section more taper than before to prevent the rapid
increase
in
the injection quantity when the initial injection
turns into the full-force injection.
Also, employed to prevent the injection quantity loss
in
the throttle section caused by carbon, the flat cut
provided
at
the needle valve section helps the throttle
withstand long use and reduce
as
much knocking sound
as
when
it
was new.
The heat seal
is
employed to improve the durability
and reliability of the nozzle.
The injection pressure
is
13.73 to
14.71
MPa (140 to
150 kgf/cm
2
,
1991
to 2133 psi), and
is
adjusted with
adjusting washers (3).
(1)
Bar
Filter
(2)
Nozzle
Holder
Body
(3) Adjusting
Washer
(4)
Nozzle
Spring
(5)
Push
Rod
11790F10300
11790M10271
(6) Governor
This mechanism maintains engine speed
at
a
constant level even under fluctuating loads, provides
stable idling and regulates maximum engine speed by
controlling the fuel injection rate.
This engine uses a mechanical governor that controls
the fuel injection rate at all speed ranges (from idling to
maximum speed) by utilizing the balance between the
flyweight's centrifugal force and spring tension.
A governor shaft for monitoring engine speed
is
independent of the injection pump shaft and rotates at
twice the speed of conventional types, providing better
response to load fluctuation and delivering greater
engine output.
(1
)
Start
Spring
(6)
Fork
Lever
Shaft
(2)
Governor
Spring
1
(7)
Flyweight
(3)
Governor
Spring
2
(8)
Torque
Spring
(4)
Fork
Lever
1
(9)
Governor
Shaft
(5)
Fork
Lever
2
(10)
Governor
Sleeve
11900F10170
11900M10190
1-M17
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