O 2 Feedback System - Suzuki DF 40 Service Manual

O FEEDBACK SYSTEM
2
After extended usage, the engine components may become deteriorated or worn out.
This might make the A / F (air / fuel mixture ratio) incorrect which could affect exhaust emissions. To correct
the A/F, an O sensor is temporally installed to the exhaust manifold. This sensor is used to measure the
2
concentration of oxygen in the exhaust gas at engine speeds of 2500, 3500 and 4500 r/ min.
The ECM uses the input data from the O
duration map within the ECM itself.
O sensor :
2
Informs ECM of concentration of oxygen in exhaust gas.
NOTE:
See the "FUEL MIXTURE CHECK (O
procedure.
sensor to correct the compensation coefficient of the fuel injection
2
FEEDBACK)" section on page 2-21 for the O
2
ENGINE CONTROL SYSTEM 3-32
ECM
feedback operation
2
Feedback