Landi LIS Installation And Adjustment Manual
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Contents
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Installation and adjustament manual20/26PROGRAMMATIONThe data that can be modified are arranged in four screens,which can be viewed by clicking the mouse on theappropriate tab or by pressing the keys F1, F2, F3, F4 andF5.The screens containing modifiable data are:- Simulation: contains the necessary data to completelyconfigure the type of Lambda sensor simulation.- Fuel Level Sensor: contains the necessary data to setup the fuel level sensor.- Fuel Switch-Over: contains the parameters thatestablish the necessary condition for the ECU to performthe petrol to LPG switch-over.- Adaptive Learn: contains the parameters for theAdaptive Learn strategy.- CutOff: contains the parameters and datas to select thegas cutoff during the deceleration.Each data field only allows a certain value range to beentered. 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 SimulationIn this screen it is possible to enter the parameters pertinentto the type of Lambda sensor signal simulation that is goingto be fed to the OEM petrol ECU during LPG operation.This signal pattern must mimic the one that the Lambdasensor inputs in the ECU during petrol operation. Theappropriate simulation is available in the data file, whichis uploaded in the ECU during the programming phase.Therefore do not modify the Lambda sensor signalsimulation unless directly advised to do so by theLANDI technical support centre.SIMULATION TYPES:1) O2-disconnected Simulation: simulates a disconnectedlambda sensor for the OEM petrol computer. Whensensing a disconnected lambda sensor, some older OEMcomputers are programmed to ignore the input and proceedaccording to a pre-programmed mode.2) Ground Simulation: sends a constantly “lean” signalto the OEM computer. This simulation works for MONO-BOSCH systems and other new vehicles.3) Constructed Wave: sends to the OEM computer asimulation 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 signalsimulates rich mixture.- Low Simulation Duration: time during which the signalsimulates lean mixture.- O2-disconnected Duration: time elapsed between twopulsation sequences.5.7.2 Fuel Level SensorThis screen allows the set-up of the type of LPG levelsensor that has been installed. The default set-up is theone for the Landi Sensor.By clicking on the option NOT STANDARD or NOTSTANDARD - INVERTED it is possible to customizethe set-up for the type of LPG level sensor that has beeninstalled.5.7.3 Fuel switch-overThis screen allows the set-up of the parameters for thepetrol to LPG switch-over. The appropriate parametervalues for the specific vehicle are already entered in theECU at the time of the program upload. In most cases thefuel switch-over is programmed to occur duringdeceleration.5.7.4 Adaptive LearnThe 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 CORRECTIVESTEPS: This is the maximum number of steps thatboth the installer and the Adaptive Learn System canperform; this is the maximum value that can beentered in the area CORRECTIVE STEPSPERFORMED (B).B) CORRECTIVE STEPS PERFORMED: these cellsshow the steps that the LIS strategy (“Automatic”line) and the installer (“Installer” line) sum to thenumber of steps programmed in the map.C) AVERAGE DRIFT: The value shown in this cellis an average of the drift of the integrator. Thisaverage is calculated during alternative fuel operation.If the abbreviation NDA is shown, this means that theengine has not worked in this specific range for asufficient time.D) ENRICHMENT RANGE: this parameter allowsmodification of the fuel enrichment duringacceleration, and it can be modified by +/- 5 stepsFig.5.9 |
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