Type Of O2 Sensor Simulation - A.E.B. AEB215 Manuel D'utilisation

VEHICLE CONFIGURATION

TYPE OF O2 SENSOR SIMULATION

The LEONARDO fuel management computer includes an Oxygen Sensor signal simulator, which has the
function of reproducing an Oxygen Sensor signal pattern that is acceptable to the E.C.U. during the GAS
operation.
Normally, the Oxygen Sensor's signal carrier wire is cut and connected to the PURPLE and GREY wires of
the LEONARDO. The PURPLE wire (connected to the Oxygen Sensor) is used as an input to control the
GAS carburetion, while the GREY wire (connected to the E.C.U.) delivers a simulated signal to prevent
the acquisition of incorrect data by the E.C.U. which could adversely affect PETROL operation.
The type of simulation changes according to the different types of E.C.U..
STANDARD SQUARE WAVE (Fig. 30)
The simulation is a square wave with fixed frequency, i.e.
RICH carburetion
LEAN carburetion
CONSTRUCTED SQUARE WAVE (Fig. 31)
By using this function, it is possible to generate an Oxygen Sensor
simulation with specific characteristics. When this function is selected,
it is possible to modify the following parameters:
HIGH WAVE DURATION (rich carburetion signal)
(Fig. 32)
This value, expressed in seconds, determines the duration of A (see
figure below). This parameter is displayed only if the "CONSTRUCTED
SQUARE WAVE" function is selected.
LOW WAVE DURATION (lean carburetion signal)
(Fig. 33)
This value, expressed in seconds, determines the duration of B (see
Figure below). This parameter is displayed only if the "CONSTRUCTED
SQUARE WAVE" function is selected.
50 - 188
A
B
LEONARDO
TYPE OF O2 SENSOR
SIMULATION
STANDARD SQUARE
WAVE
Fig. 30
TYPE OF O2 SENSOR
SIMULATION
CONSTRUCTED
SQUARE WAVE
Fig. 31
HIGH WAVE DURATION
0.36 s
Fig. 32
LOW WAVE DURATION
0.36 s
Fig. 33
Is215-2 Rev. 110105-2