Bajaj pulsar DTS-i, Service Station Manual

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CO CHECKING & SETTING
Pulsar 150/180 DTS-i
Service Station Manual
74
Dealer Development Center
Akurdi Pune
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Remove M-5 bolt & aluminum
washer fitted to the nozzle
(12mm OD) shown in figure,
of the connecting tube welded
to silencer pipe before CAT
converter.
Use a Silicon Rubber tube of
approximately 300 mm to fit
onto the nozzle. Only a
Silicon rubber tube should be
used, as it has better high
temp. resistance & will not
deform / melt due to high temp. at the nozzle.
Connect the other end of the Silicon Rubber tube to
the flexible probe pipe of machine. Ensure that the
inner diameter of Silicon tube perfectly matches with
outer diameter of flexible probe pipe of Gas Analyzer.
The Silicon rubber tube must fit snugly onto the
nozzle to prevent any air / exhaust gas leakage.
Note the CO / HC readings when the reading display
stabilizes.
As per Emission Norms the recommended CO% for 2
Wheelers is 3.5% at idling RPM. But CO% for Bajaj
Vehicles, for best results in terms of fuel efficiency are
different for different models. The ideal CO% is
between 1.5 to 2.5% at idling RPM = 1400 + 100.
If the reading is shown excess or less than BAL
specifications, try to achieve by adjusting VC Screw.
Turning in VC Screw will lead to less CO% and
turning out will lead to more CO%.
If the CO% is not falling within recommended % in
spite of adjusting the VC Screw then find out the
cause & rectify. After rectifying the problem confirm
the CO% in the same way as mentioned above.
Important: For better mileage & performance, achieve
CO% as recommended.
In Pulsar motorcycle for better mileage and performance
achieve values given below.
Note: Remember the VC Screw should not be taken out more
than the recommended position. Every time VC Screw setting is
changed specified Idling RPM must be restored & then reading
should be considered.
Warm up the CO Gas Analyzer
for 10~15 minutes before
proceeding further. Warming up
is essential every time machine
is put on to purge out any
gases left in side.
Carry out Span Check as per
manufacturer's Recommendation
to confirm the OK condition of
the Equipment (If Span Check
does not confirm the reading,
then carry out Gas Calibration as per mfgrs.
recommendation). Set the Equipment display to Zero
before taking the reading.
Readiness of CO Gas Analyser
Readiness of the Vehicle
Taking the Reading
Before checking CO emission, prepare the vehicle for
checking the CO.
Warm up the engine to its normal operating temp. by
riding 5~6 Kms. The crankcase cover should be
warm enough by feel. (Engine Oil Temp. = 60 C).
: In choke ‘ON’ condition CO % is high : 9~10%.
Hence warming up of engine is a must.
Set CO to 1.5 ~ 2.5 %.
Note: If engine does not go off, then attend to the
additional air supply problem in the carburetor circuit &
intake system. After solving the problem once again
confirm that engine should die down on closing the VC
Screw.
Set CO to 1.5 ~ 2.5 %.
Set Idling speed to specified
Idling 1400 100 rpm. Raise
the engine to moderate
speed at no load condition
for about 15 seconds. Then
bring back to specified idling
RPM.
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Caution
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1.5% ~ 2.5%
2.5 2
turns out
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1400 100 rpm +
Recommended
CO%
VC Screw Position
Recommended
Idling RPM
Recommended CO% value w.r.t. VC Screw
and Idling RPM for Better Fuel Efficiency