Skoda 105 s 1980 Workshop Manual page 60

Technical Description
C a r M o d e l
1976/1979
Carburettor type and model
1 9 7 9 o n w a r d s *
1 0 5
120
120
S a n d 1 0 5 L
L
LS
Types of carburettors and their functional elements according to the,polex cdnparison table or
their bore (in millimetres)
JlKOV32 EDSR - 443751 290 1 00
JlKOV32 EDSR - 443751 292400
JrKOV32 EDSR - 443751 31 9 800
JlKOV32 EDSR - 443751 292500
J|KOV32 EDSR - 443751290000
J|KOVg2 EnFF - 443751 292600
to
; 1
C a r m o d e l
1 0 5 S , 1 O 5 L
i t Z O r -
'
l 2 O L s :
Carburettor type and model
Se.B above
E l e m e n t s o f s t a g e I a n d l l o r i n c o m m o n
F g e
1
2
1 2 t
2
A t o m i z e r c o n e d i a m e t e r
M a i n p e t r o l j e t
M a i n a i r j e t
P i l o t j e t
P i l o t a i r j e t
A u x i l i a r y p i l o t j e t
Econostat petrol jet
Econostat mixture jet
Econostat air jet
Choke petrol jet
C h o k e a i r j e t d i a m e t e r
Diaphragm control air valve
Pump by-pass orifice
Injector
N e e d l e v a l v e d i a m e t e r
S u c t i o n c o n n e c t i o n d i a m e t e r
2 1
1 0 5
1 7 0
50
1 4 0
60
95/85'
70
90
4.5/5.5*
1 3 0
40/45*
50
1 . 5
1 . 2
2 2
1 1 2 / 1 1 0 *
1 7 0
50
140
60
1 1 0
7 0
1 00/90*
4.5/5.5'
1 6 0
40/45*
50
22
23
' . 1 1 2 / 1 1 0 *
1 3 0 / 1 2 5 *
170
50
140
1Orygo*
4.5/5.s*
. 8 0
40/45*
2 2
120
1 6 0
4 5
1 . 5
1 . 2
1 , 5
1 . 2
2 3
125
1 6 0
45
1 6 0
45
60
Jo
70
1 ' t o
70
50
Jo
*erF
or"fs?
,.w'1'
80
A c c e l e r a t i o n p u m p d i s c h a r g e
Float weight
2O t 1 gram
7 to 9 c.c. per 1O strokes (1976-79) 6 to 8.$19f9 onwards)
Fuel level. Float Removed.'28mm t'1mm frEm bp face
Moin System (Fig. 2.1gl1l
Both mixing chombers hove self-contoined
moin systems. Air is mixed with petrol in the
emulsion tube ond the finol odiustment of the
mixture tokes ploce while it is corried off by
the oir flow with the throttle disc open.
ldle Run ond By-poss System
(Fis.2.19l2l
These ore token core of by two circuits - by
the idle run system in stoge I ond the ouxiliory
oir system in stoge ll. Both systems ore con-
nected to the moin systems of both stoges in
the zone of the emulsion orifice by the re-
spective elements terminoted by the odiustoble
idling screw ond fost-idling (ouxiltory oir)
screw.
- Stoge I incorporotes the petrol iet seporotor
for the prevention of self-ignition. The idling ori-
fice is interconnected with the mixing chomber
by two by-poss bolts enobling c smboth tron-
sition to the moin system, ond o hole is pro-
vided in the mixing chomber to obviote ony
interference with the smooth flow ot o hlgtler
u n d e r p r e s s u r e ( v o c u u m ) .
.
ln stoge ll, the by-poss hole enhonces
o smooth ond continuous intgrconnection of
both corburettor stoges.
Econostot or rich-mixture syste4 (Fig. 2.19/3)
This system enriches the mixture in stoge I
ot higher engine lood (output). lt operotes
outomoticolly occording to the volue of under',
pressure in the otomizer ond in dependence onf
the flow of oir sucked-in by the engine.
Accelerqtion pumP (Fig. 2.19i5)
This is o mechonicol, diophrogm-type PumP
controlled by the throttle disc of stoge l. Fuel
sucked-in by the diophrogm from the floot
chomber posses through o non'return boll volve
to the iniector ond through the by'poss orifice
bock into the floot chomber. At o sudden open-
ing of the throttle disc, the moior part of the
fuel poses through the iniector, ot o slow
opening into the by-poss without the oction
of the iniector.
60