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-lJmlr
.
~
.'~
'..,.;I)
.
:"
l·D~lYBry
valy!!
4.conlTOll'1ck
7.Plunger
2·Dt1jlltry chamber
s.control pi nion
B-Feed
hole
3.cOl'ltrOI
grooVE
6-ConlTol
'$"1C'.!tl'Ve
9-f
u-e' chambe,.
Plunger rotating mechanism
Ftfd
1'I0re
"rTol
groove
EffeoetjYI!I UrDk'll
CONSTRUCTION AND FUNCTION
b.
Control .ction
The
amount
of fuel delivery, or injection
quantity,
per stroke
is
determined
primaJily by the
effective
pumping
stroke
of
the plungeL
The control groove
milled out in
the
plunger
being
slanted,
tu
rning
the plunger around
its axis changes
its effective
stroke, and this turning
is
effected
by
moving
the
con
teol rack
.
How the
e:ffl!'ctivestroke is
va.titd
is
illus.trated in
thr-ee
views
of the
plunger,
cylinder,
contlol pinion
and rack
:
,
A'
De-llvery
stroili'
"T
;
{
Doh\o'tfV 5"troki!
EHe-c-l
ive m~l
T
[1
1
Nono
ir.jeCl
ion
(21 Half
iniectlon
Injection
Quantity
control
13)
Fun IniEI!Cllon
(4)
DeIivety
valve
The
seat
of
the
delivery
valve
tak ..
its
position
right .bove the
barr.1
and is held down tight
by
the
screw-in
pipe connection.
The
valve has its
guide portion
fined
into
the
bore
of
the
seat
,
and
is capable
of
moving \'e:rticaily. A coil
sprinS
urges
the
ruve
downw:ud
lo
keep
the
valve
in
contact
with
the
sea,
face
by
ils conical
f.ce
,
It should
be
noted that a
land
is formed of
the
valve, a
little
above
its guide
porlian, forming an
annular reces.s
be-tween
it
and
the
cone.
This recess
assumes
importance
in
regard
to
Usxtraction
vol·
ume
,"
ment ioned
previously.
CD~
CV"' - ---ijID
V,'ve
1
~
Del;"",
y,l",
,
~a
1
1..s'.lU"Ig
fare
2-l,.and
Dslivary v.alve
27
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