Installation and adjustament manual
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PROGRAMMATION
The data that can be modified are arranged in four screens,
which can be viewed by clicking the mouse on the
appropriate tab or by pressing the keys F1, F2, F3, F4 and
F5.
The screens containing modifiable data are:
- Simulation: contains the necessary data to completely
configure the type of Lambda sensor simulation.
- Fuel Level Sensor: contains the necessary data to set
up the fuel level sensor.
- Fuel Switch-Over: contains the parameters that
establish the necessary condition for the ECU to perform
the petrol to LPG switch-over.
- Adaptive Learn: contains the parameters for the
Adaptive Learn strategy.
- CutOff: contains the parameters and datas to select the
gas cutoff during the deceleration.
Each data field only allows a certain value range to be
entered. This range changes from data field to data field.
In case of input error:
-
the computer warns the operator.
-
the computer shows the range of acceptable values.
5.7.1 Simulation
In this screen it is possible to enter the parameters pertinent
to the type of Lambda sensor signal simulation that is going
to be fed to the OEM petrol ECU during LPG operation.
This signal pattern must mimic the one that the Lambda
sensor inputs in the ECU during petrol operation. The
appropriate simulation is available in the data file, which
is uploaded in the ECU during the programming phase.
Therefore do not modify the Lambda sensor signal
simulation unless directly advised to do so by the
LANDI technical support centre.
SIMULATION TYPES:
1) O2-disconnected Simulation: simulates a disconnected
lambda sensor for the OEM petrol computer. When
sensing a disconnected lambda sensor, some older OEM
computers are programmed to ignore the input and proceed
according to a pre-programmed mode.
2) Ground Simulation: sends a constantly “lean” signal
to the OEM computer. This simulation works for MONO-
BOSCH systems and other new vehicles.
3) Constructed Wave: sends to the OEM computer a
simulation constructed with the following parameters:
- Frequency: number of waves sent to the OEM compu-
ter after simulating disconnection of the lambda sensor.
- High Simulation Duration: time during which the signal
simulates rich mixture.
- Low Simulation Duration: time during which the signal
simulates lean mixture.
- O2-disconnected Duration: time elapsed between two
pulsation sequences.
5.7.2 Fuel Level Sensor
This screen allows the set-up of the type of LPG level
sensor that has been installed. The default set-up is the
one for the Landi Sensor.
By clicking on the option NOT STANDARD or NOT
STANDARD - INVERTED it is possible to customize
the set-up for the type of LPG level sensor that has been
installed.
5.7.3 Fuel switch-over
This screen allows the set-up of the parameters for the
petrol to LPG switch-over. The appropriate parameter
values for the specific vehicle are already entered in the
ECU at the time of the program upload. In most cases the
fuel switch-over is programmed to occur during
deceleration.
5.7.4 Adaptive Learn
The adaptive learn screen (Fig 5.9) makes possible to:
- set-up some parameters for mapping modification;
- enable or disable Adaptive Learn;
- modify the degree of enrichment;
- verify the changes performed by the Adaptive Learn.
A) MAXIMUM NUMBER OF CORRECTIVE
STEPS: This is the maximum number of steps that
both the installer and the Adaptive Learn System can
perform; this is the maximum value that can be
entered in the area CORRECTIVE STEPS
PERFORMED (B).
B) CORRECTIVE STEPS PERFORMED: these cells
show the steps that the LIS strategy (“Automatic”
line) and the installer (“Installer” line) sum to the
number of steps programmed in the map.
C) AVERAGE DRIFT: The value shown in this cell
is an average of the drift of the integrator. This
average is calculated during alternative fuel operation.
If the abbreviation NDA is shown, this means that the
engine has not worked in this specific range for a
sufficient time.
D) ENRICHMENT RANGE: this parameter allows
modification of the fuel enrichment during
acceleration, and it can be modified by +/- 5 steps
Fig.5.9
