ELE. - 24
SENSORS
LAMBDA PROBE
L
They are situated on the exhaust manifold (A), Fig. L.
The lambda probe serves to detect the oxygen concentration in
the exhaust gases. More precisely, the lambda value indicates
the air/petrol ratio, in which:
• Value 1, when combustion is stoichiometric
• <1, in case of fuel excess
• <1, in case of air excess
The probe transmits the electric signal to the ECU, which con-
trols the insertion of fuel and air into the combustion chamber.
- Threshold value of air-fuel ratio: >750 mVcc
- Dilute threshold of air-fuel ratio: >120 mVcc
- Heating power of lambda probe: 7.0 W
- 450°C exhausted gas temperature, 70% duty ratio, 10Hz,
13.5V voltage.
- Heatingpower:9.6±1.5Ω(measuredat21°C)
- Operating temperature range: 260-850°C
A
CHARACTERISTIC OPERATING CURVE
COUPLER
COPY - Moto GB - Grant Martland - grantmartland@motogb.co.uk
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