II js a
pOSJtive
displacemtnt pump with
its
rot
O[3
m
troc.hoidal
mes
h.
This
mesh
is
relatively
free
of
abrasive
a
ClJon
and
enables t
he
rotors to
serv~
long
and
keeps
up
i
ts
pum
ping
pcrronnance .
It
s d
e.s.i
gn performance
is
as
foUow.:
P.J
mp .pe,{j
Displacement Discharge
pre
ssu
re
1200 rpm
19.2
li
ters
(l
In 3
ks/cm'
(43 psi)
cu in.)/minu«
a\
50
°C
(In"F)
OiJ
filler
The
ruler
is.
m
ounted
on
the
righ
lahand
.sidt:.
of c
rank
case
al
its
ccnttr
piU'
t.
The
vaJ\te
mentioned
above
f
or
lett
ing
the
o
li
bypa
ss
the
element
is
actually
::I
relief
val'Ye
located
in
the center portion
of
the elemen
t.
This
va
lve
IS
Stt to open
when
the
differ~nt
i
a
l
pr
e
ssure
aCrOSS
the
element
rises
\0
J.O
± 0.2 kg/cm'
(1
4.2 ± 2.8 psi); when
the
V;\
]
vc
opens. the oil flows
di
rectly from
in.let
s
ide-
to
outlet side. The
fllter
element must
be
ser,r:lc~d
regularly
or
before the element becomes so di
ny
as to ac!uate
lru
bypass
valve.
-=
/
~3
'
""
(j)
~
,
<..A..I
1·EIDmcnl
3·SVPIii5S
V.1lvtJ
2..a.
r.acket
Oil
filter -
Cross
sect
i
on
T
he
oil fil\er head
has
a built·in relief
va
l
ve
operut
ing
in
r
es
ponse
to
the
oil
pump dischalge
pre"u,
•. This
valve
starts
relieving
when
the
pre
ssure
rises
10
3 ± 0.3
kg/eml
(43
± 4.3 psi), thereby bleeding tho excess oil
\0
the oil
pan
and
limiting the
preSSllre
of
oil
reaching
the
engine
oil
gallery
to a
cons.tant
leveL
Fuel system
f u
el
circuit
CONSTRUCTION AND FUNCTION
~
ti
cv
•
(1)
~~
@
i-®
O
il
fi
lt
er
' ·Elem!l!fl!
2
.c
e
J1le
r seraw
J·
9f11etc:et
4·Reliei valve
The f
uel
feed
pump, mounted on
the
fue
l injection
pump body and
f
orming'
part
of
lhe injection pump
uni
t,
draws
fuel
f,om Ihe fuel tan k
and
delivers it
through
the
fuel
fil
t
er
to the gallery
inside
the
mject
ion
pump.
The
in.iection
pum
p
is
of
indivjdual
plunge-r
ty
pe,
con
-
sistjng
of
(our
plunger
pump
elements
wruch
ilr
c
dnven
from
il
COmJllOrt
camshaft. Each pump
eien;erH
delivus,
intermittently, a
.hot
of
high-p,.ssure
fue
l
oil
to its
injection nozzle through its own injection
pi
pe. These
sbots
are
sync
hr
onized to the diesel c
yd
e
in
each
cylinder
and
timed
by
the setting
of
the
ttming
mecha~
njsm
.
"I
nje
c
ti
o
ll
quantity."
or
the amount
of
fuel delivered
uniformly by the four pump elements
10
Ih. 'nglne
thro
u
gh
t
heir
in
j
ection
noz.z.les
,
is
c
on.trolled
from
the
accel
e
rator
through
a
linkage
and
ilutomaticiJlIy
adju
s
ted
by
the
inje-elion
pum
p governor on
the
baSi
s
of
engjne
speed
and
load
rc:quiremeJlts.
Each injection nozzle
is
spring·loaded
10
>pray
fuel"
prcssures not lower than J 20 kg/cm'
(J
706
psi)
. A
P3Tt
of
each
shot
of
fue
l
reaching
the
nozzle
returns
10
fuel
feed pump through a leak·off pipe commOn to
all
four
nou.le •. The
in
jection nozzle
is
of
throttle type
(a>
distingu
is
hed from standard type), and
>p
r
ays
fuel
in
atomized
form
int
o
the
pr
ec
om
b
us
t
ion
chamber.
The
governor
built in the injection
pump
bo
dy
is
a
mechanical
aJl.speed
governor,
which
limits
the
maxi
-
mum
and
minimum
e
ngine
sp
ee
ds
and
actuates
the
control
ra
ck
of
the
inject
io
n
pump
10
maintain
3
co
rutant
engme
s
peed
under
varying
load
condition
at
a
speed
level
proportionaJ
to
th
e
po~tlon
of
the
acceJera
·
lo
r.
23
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