Bajaj Discover 100M Service Station Manual page 109

CARBURETTOR CIRCUITS
PILOT SYSTEM - Slow Speed System
TPS
hi[ l s[ º Tr
TPS
(Hall Sensor)
a[ r Ak| &
Air Screw
Engine
Side
Delivery
Of Air - Fuel
Mixture
a[ r fy& a l
m)xrn) D)l)vr)
Idling
Adjusting
Screw
a[ e Dl)> g a[ D jAT)> g Ak| &
fli[ T
Float
Pilot Jet
pieli[ T j[ T
Main Jet
m[ e n j[ T
pieli[ T j[ T s)ATm, aieD)l)> g an[ ai[ C i K& l [ l i Y\ i [ T lmi> jyir[ m& ² y s)ATm cil& n hi[ y Ryir[ hvi fy& a ln& >
m)xr p& r & piD[ C[ .
• The pilot system provides the air fuel fixture at idling and at small throttle opening when the main system is not in
operation.
• Fuel from the bowl is metered by the pilot jet and mixed with the air proportionately controlled by the air screw. The
atomized fuel reaches the venturi through the pilot outlet and mixes with the air flowing through venturi. The pilot
outlet is located on the manifold side of the carburettor and is just covered by the throttle valve wall. Since the
throttle valve is almost closed at idling speed, the pilot outlet is only partially exposed to the manifold vacuum.
Hence it gives minimum fuel just to run the engine. When the throttle valve is raised opening throttle, pilot outlet is
fully exposed to the manifold vacuum and supplies fuel to its full extent which is sufficient to meet the engine
requirement at slow speed.
• Air-fuel mixture becomes lean when Air Screw (AS) is loosened (AS turned anticlockwise) and rich when it is
tightened (AS turned clockwise).
hvi fy& a l n& > m)~N jyir[ a[ r Ak| & { } Q)li[ Yiy Ryir[ l)n {ai[ C & > } hi[ y an[ TieT hi[ y Ryir[ r)c {vFir[ } hi[ y C[ .
Discover 100 M
Service Station Manual
pieli[ T s)ATm {Ali[ Ap)D s)ATm}
AS
78
Y\ i [ T l k[ p
Cap Throttle
TPS
m[ g n[ T { }
Magnet (TPS)
fy& a l enl[ T
Fuel Inlet
Venturi
v[ º c& r )
Air
Filter
Side
Air Inlet
a[ r enl[ T
(For Pilot Jet)
hvi {pieli[ T j[ T miT[ }
fli[ T p)n
Float Pin
p[ T ^ i [ l
Petrol
Float
fli[ T c[ À br {biul}
Chamber
(Bowl)
Side View
sieDni[ d[ K iv
Air
Dealer Development Center
Akurdi Pune