VOGELS VGI User manual

HARDWARE MANUAL
LPG Engine kit
VGI
Vogels Autogas Systems
Ekkersrijt 3016, 5692 CA Son, The Netherlands
Email: [e-mail]
Online: www.vogelsautogas.com

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INHOUDSOPGAVE:
INHOUDSOPGAVE:.....................................................................................................................................................2
1 SYSTEM DESCRIPTION AND INSTALLATION:..................................................................................................4
1.1 I NTRODUCTION .................................................................................................................................................4
1.2 I NLET AND OUTLET SIGNALS :..............................................................................................................................5
1.2.1 Inlet signals .............................................................................................................................................5
1.2.2 Outlet signals ..........................................................................................................................................6
1.3 C OMPONENTS SURVEY ......................................................................................................................................6
1.4 G ENERAL CONDITIONALS BEFORE THE INSTALLATION ..........................................................................................7
1.5 G AS HOSES SURVEY :........................................................................................................................................8
1.6 P RESSURE REGULATORS ..................................................................................................................................9
1.6.1 Pressure Regulator Landi LI02...............................................................................................................9
1.6.2 Pressure regulator Landi IG1................................................................................................................10
1.6.3 Pressure Regulator Emer Palladio:.......................................................................................................11
1.6.4 Pressure regulator installation instructions:..........................................................................................12
1.7 G AS FILTER - UNIT ............................................................................................................................................13
1.8 G AS I NJECTOR R AILS ......................................................................................................................................14
1.8.1 Injectorrail Landi GI...............................................................................................................................14
1.8.2 Injector rail AEBINJ...............................................................................................................................15
1.8.3 Injector rail Valtek Type 34 ...................................................................................................................16
1.8.4 Injectorrail installation instructions........................................................................................................17
1.9 N OZZLES ........................................................................................................................................................18
1.9.1 Nozzle installation instructions:.............................................................................................................18
1.10 W ATER TEMPERATURE SENSOR .......................................................................................................................18
1.11 P RESSURE - MAP- SENSOR AEB025................................................................................................................19
1.11.1 MAP-sensor installation instructions:....................................................................................................19
1.12 G AS -ECU......................................................................................................................................................20
1.12.1 ECU Landi LRE184 / LRE188...............................................................................................................21
1.12.1.1 Electrical Connection Survey Landi Omegas 4 Cyl. ECU .............................................................22
1.12.1.2 Cable and Pin-out information for Landi ECU 4 cyl.......................................................................23
1.12.1.3 Cable and Pin-out information for Landi ECU 8 cyl.......................................................................24
1.12.2 ECU VGI 4 Cyl. AEB2001NC OBD.......................................................................................................25
1.12.2.1 PIN-OUT ECU VGI 4 Cyl. AEB2001NC ........................................................................................26
1.12.2.2 Electrical Connections ECU VGI 4 cyl. AEB2001NC ....................................................................27
1.12.3 ECU VGI 4 Cyl. MP 48 OBD.................................................................................................................25
1.12.3.1 PIN-OUT ECU VGI 4 Cyl. MP 48 OBD..........................................................................................26
1.12.3.2 Electrical Connections ECU VGI 4 cyl. MP 48 OBD......................................................................30
1.12.4 ECU VGI 8 Cyl. AEB2568D OBD .........................................................................................................31
1.12.4.1 PIN-OUT ECU VGI 8 Cyl. AEB2568D...........................................................................................32
1.12.4.2 Electrical Connections ECU VGI 8 cyl. AEB2568D.......................................................................33
1.13 GAS ECU I NSTALLATION I NSTRUCTIONS .........................................................................................................34
1.14 E LECTRICAL I NSTALLATION I NSTRUCTIONS :......................................................................................................35
1.14.1 Fuse Installation Instructions ................................................................................................................35
1.14.2 Injection Signal Cutting Installation Instructions: ..................................................................................36
1.14.3 OBD Connections .................................................................................................................................40
1.15 U SERINTERFACE / G AS S WITCH .......................................................................................................................41
Emergency start procedure on gas .....................................................................................................................41

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2 MAINTENANCE AND SERVICE.........................................................................................................................42
2.1 I
NTRODUCTION ...............................................................................................................................................42
2.2 M AINTENANCE ................................................................................................................................................42
Error codes and diagnostic check .......................................................................................................................42
External check.....................................................................................................................................................42
Filter unit maintenance........................................................................................................................................42
System pressure check and adjustment .............................................................................................................43
2.3 R ECOMMENDATIONS .......................................................................................................................................43
2.4 I N C ASE O F A CCIDENT ....................................................................................................................................43
2.5 ARRANGEMENT OF THE LPG RETROFIT SYSTEM TYPE APPROVAL MARK.......................................43
This document is called: VGI Components and Installation Manual#02.pdf

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1 System description and installation:
1.1 Introduction
The VGI gas system is one of the most modern auto gas systems momentarily available in the market. It concerns
as the name already indicates a sequential slave injection system, which means that for each cylinder the right
amount of gas is being injected.
The system uses the petrol-injector signals as main inlet signal to determine the right amount of gas to be injected
for each cylinder of the engine on that particular moment.
The system normally starts on petrol and when the engine is warm enough, the fuel switch in gas mode, the gas
ECU (Electronic Control Unit) will pick the right moment to switch over to gas.
As first the solenoids on the tank and pressure regulator will open, so LPG can enter the pressure regulator. The
pressure will be regulated at approximately 1 bar overpressure for the rest of the gas injection system. The gas
flows from the pressure regulator through a dry gas filter the injector rail to feed each single gas injector. The gas
filter will block particulars and avoid them polluting the gas injectors. From the switch-over moment (petrol to gas)
the petrol injector signals will be interrupted by the gas-ECU and routed to its micro processor to calculate the gas
injection signals.
Using the petrol injection signal to determine the gas injection signal is called the slave system principle. Moreover
the VGI system works according the “same cylinder” principle, which means that the gas injection signal is based
upon the petrol injection signal of the very same cylinder and rotation of the engine. So no delay which can cause
any control frequency degreasing will occur. So is the gas injection signal for cylindernr. 1 based upon the petrol
injection signal of petrol injectornr. 1 of that very same moment. Each gas injector will inject the same amount of
gas in fuel quantity as it would do on petrol.
Petrol and LPG are two very different fuels and have totally different properties which need to be taken in
consideration for the “translation” of the petrol to gas injection signal. In transient conditions and during the
warming up phase, compensation strategies need to be activated to correct the differences between the two fuels.
To be able to effectuate these compensation strategies, the system uses other inlet signals such as gas
temperature, gas pressure and water temperature. Besides the driving of the gas injectors the gas ECU has also
other functions, such as measuring and indicating the fuel level, driving the solenoids on the tank and pressure
regulator and switch over from one fuel to another. When the car has run out of LPG the system automatically
switches back to petrol and warns the driver with an acoustic sound.
During the installation and maintenance of the system it is possible to check its functioning and check its
diagnostics with the interface loom and interface software installed on a laptop or other PC.
Image is copyright protected by Luccio Engineering

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1.2 Inlet and outlet signals:
1.2.1 Inlet signals
Gas ECU
Cyl.1
Cyl.4
Cyl.3
Cyl.2
Petrol injectors
R.P.M
Engine temp.
MAP
G. Inj.1
G. Inj.4
G. Inj.3
G. Inj.2
Gas temp . & pressure
Pressure
regulator
LPG-tank
Fuel level
Tank solenoid
Gas solenoid
Gas filter
Inlet signal Function
Petrol-injection signals The system uses as main inlet signal the petrol injection signals of each separate
petrol injector to determine the gas injector signal. The VGI system is a “slave system”
and follows the petrol injector signals to translate this signal to a gas injection signal.
The power supply of the petrol injectors is used as an ignition signal for the gas-ECU.
RPM signal The RPM signal (engine speed) is used as a reference parameter to be able to
translate the petrol injection signal to the gas injection signal. Moreover the signal is
used to determine whether the engine is still running.
Water temperature signal The water temperature is used as a condition for switch over from petrol to gas.
Moreover it’s being used for the correction of the fuel differences in cold engine
conditions. The temperature signal can be taken from a temperature sensor that is to
be placed in a water hose or from the original engine temperature sensor.
Gas pressure signal By an increasing absolute gas pressure the density of the gas will increase as well and
so will the energy value per volume unit. To compensate this variation, a gas pressure
correction strategy is introduced to shorten in this case the injection duration. A very
low gas pressure will make the system switch back to petrol.
Gas temperature signal An increasing gas temperature will lead to a lower gas density. To compensate this
variation, a gas temperature correction strategy is introduced to increase in this case
the injection duration.
Fuel level signal The fuel level sensor gives the gas ECU an indication of the remaining fuel in the tank.
The gas ECU displays the fuel level on the fuel switch.
MAP signal The manifold absolute pressure signal can be used as an option to determine the
pressure difference between the inlet and outlet of the gas injectors.
Lambda signal As an option the lambda signal can be connected to the gas ECU to display its value in
the interface software. This can be beneficial during the calibration of the vehicle.

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1.2.2 Outlet signals
1.3 Components survey
1 Fuel switch / User interface
2 Gas ECU (Electronic Control Unit)
3 Dry gas filter
4 Pressure regulator
5 Gas injector rail with pressure and temperature sensor
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Outlet signal Function
Gas-injectionsignal The main outlet signals are gas injector signals which determine the amount of
injected fuel into the engine. Each cylinder has its own injector and signal. Petrol
injection signal of cylinder A corresponds with gas injector A.
Tank solenoid signal This signal opens or closes the solenoid valve on the outlet of the LPG tank, so LPG
can or cannot run to the pressure regulator.
Gas solenoid valve This signal opens or closes the solenoid valve on the inlet of pressure regulator, so
LPG can or cannot run into the pressure regulator and the rest of the system.
Serial communication
with the fuel switch. The fuel switch and Gas ECU are connected with each other through a serial communication link. They inform each other on fule selection, fuel level and possible
diagnostics errors.
Serial communication
with a PC. Using an interface cable and an interface program on the PC or laptop it is possible to check the system and modify settings. The gas ECU and PC communicate trough a
serial connection.

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1.4 General conditionals before the installation
Before the conversion
Check before you start with any conversion of there are any malfunctions or diagnostics in the vehicle on petrol.
This can avoid many problems after the conversion.
Moreover check the vehicle on the following points:
•The state of the engine air inlet filter.
•The state of the ignition system such as spark plugs, spark plug cablesabels, coils.
•Inlet and outlet valves for leakkage and check the valves clearance.
•Functioning of the lambda probe and the catalyst.
When neccessary first make the proper adjustments on petrol and replace broken parts before converting the
vehicle to gas.
The following types of vehicles can NOT be converted with the VGI system
- With engine with a carburettor
- Bosch K-jetronic injection
- Engines with Peak and Hold petrol injectors (Resistance of injector is less than 6 Ohm)
- Direct injection engines (Use a special version of VGI)
Remarks regarding all gas containing components
•Fix all components in the engine compartment according the specific installation manual of that particular
vehicle. Fix the components using the brackets coming with the kit on to solids parts of the vehicle or directly
on to these solid parts.
•Never fix a gas component in or close to space of the ventilation system of the passenger compartment.
•Never fix any component closer than 200 mm away from a heat source such as the exhaust system for
example. In any case this unavoidable, place a heat sheeld of minimum 1 mm thick in between.
•Avoid hoses and tubes to make sharp bends or to fold.
Remarks regarding all components
Add a protective anti corrosion layer to all metal components such as the regulator and brackets and all fixing
points after the complete installation and check-up of the system. Do this to avoid rust and corrosion and a good
conservation of the system and vehicle.
Fix all components according European and or national regulations.

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1.5 Gas hoses survey:
The pictures below give a schematic view of how the (gas) hoses are connected to the various gas components
and therefor how these components are connected to one another.
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Legenda:
1. LPG-inlet
2. 14 mm hose between pressure regulator and gasfilter.
3. 14 mm hose between gasfilter and injectorrail.
4. 6 mm hose between injectorrail and nozzle in inlet manifold.
5. MAP-connection
6. Overpressure connection. The hose has to finish outside of the enige compartment (R-67-01)
Gas hose installation instructions:
•Avoid gas hoses to run closely to heat sources.
•Avoid gas hoses to run past sharp objects and possibly be damaged in time.
•Connect the gas hoses correctly to the components and avoid and check for leakages.

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1.6 Pressure regulators
The VGI gas system is available with different types of pressure regulators. The choice depends on the power of
the engine and the budget of the installation.
LI02
IG1
Palladio
The available pressure regulators are decribed below:
1.6.1 Pressure Regulator Landi LI02
The pressure regulator (Fig. 4) is a single-stage, compensated, diaphragm type, with water-gas heat exchanger, It
is calibrated for a supply pressure of: - 0.95 bar (95 kPa), higher than the pressure present in the inlet manifold for
normally-aspirated vehicles.
Technical specifications:
Weight 840 g.
Working pressure:…………. 0.95 bar (95 kPa) rel.
Nominal operating flow rate:…………..… 30 Kg/h
Working temperature:……………… -20 to 120 °C
Safety valve calibration pressure:. 3.5 bar (350 kPa)
Type approval R67:………….. E13 67R-010056
Shut-off valve specifications:
Type:…………………….…MED Type 71
Coil tension:………………….…..12V DC
Power of coil:……………………..….11W
Normally:……………………….…..Closed
Homologation LPG No.:.E4 67R-0193001
Legend:
1) LPG-input and connection with shut-
off valve.
2) LPG-outlet
3) Pressure adjustment
4) Engine vacuum (MAP)
5) Overpressure valve
6) Water in- and outlet
7) Fixing point
A: Pressure Regulator
B: Filter-unit
C: Injector rail
D: Nozzles
E: MAP-connection
F: Inlet manifold
G: Gas inlet
H: Gas Tube 14mm
I: Gas Tube 14mm
L: Gas Tube 6mm
M: MAP Tube
N: Water heating tubes

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1.6.2 Pressure regulator Landi IG1
The IG1 pressure regulator is a two-stage type. It is heated with engine heat by the engine coolant. The integrated
valve (1 to 3) also filters incoming gas. The pressure regulator adjusts the output pressure to just 1.0 bar (100 kPa)
above the pressure at the compensation port (6) (MAP). The first stage has an operating pressure of 1.6 bar above
atmposperic pressure. The second stage ensures further pressure reduction and is adjustable.
Specifications:
First stage operating pressure:1.6 bar (160 kPa) relative
Second stage operating pressure:.1.0 bar (100 kPa) rel.
Nominal flow volume:.......................................40 Nm3/h
Working temperature:……………………… -20 to 120 °C
Pressure relief flow valve:....................4.5 bar (450 kPa)
Homologation LPG No.:....................... E13 67R-010025
Shut-off valve specifications:
Type:…………………….…MED Type 71
Coil tension:………………….…..12V DC
Power of coil:……………………..….11W
Normally:……………………….…..Closed
Homologation LPG No.:.E4 67R-0193001
The IG1 pressure reducer is available in 3 versions:
IG1 Normal: until engine power of 160 kW.
IG1 Maggiorato: until engine power of 200 kW
IG1 Super Maggiorato: until engine power of 280 kW
Legend:
1) LPG inlet port
2) Filter
3) LPG flow valve
4) LPG outlet port
5) Second stage pressure adjustment
6) MAP connection
7) Water inlet and outlet port
8) Fixing points
A: Pressure Regulator
B: Filter-unit
C: Injector rail
D: Nozzles
E: MAP-connection
F: Inlet manifold
G: Gas inlet
H: Gas Tube 14mm
I: Gas Tube 14mm
L: Gas Tube 6mm
M: MAP Tube
N: Water heating tubes

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1.6.3 Pressure Regulator Emer Palladio:
The vaporizer, as its name indicates, is a device which has two
principal functions:
regulate the feed pressure of LPG tank, to the service pressure;
and convert the LPG from liquid state to gaseous state. This
device has two independents contiguous chambers. In first
chamber the pressure is regulated and LPG is gasified
(entering in liquid state). Second chamber makes the
interchanger of heat function.
The maximum LPG feeding pressure, in liquid state, to reducer
is 3.000 Kpa (30 bar).
In regulation chamber, pressure is reduced to 140 Kpa (1,4 bar)
relative, by a regulation device formed by a spring and the
diaphragm, that is hooked to the closing valve direct plunger.
Also, when is gasified, the gas which is in the chamber is 100%
gaseous state, that is which comes out through the hose toward
the injectors rail.
Specifications:
Nominal operating pressure:...1.4 bar (140 kPa) relative
Adjustable operating pressure:…….0.9 – 1.6 bar relative
Nominal flow volume:.......................................50 Nm3/h
Working temperature:……………………… -20 to 120 °C
Pressure relief flow valve:....................4.5 bar (450 kPa)
Intergrated temp. sensor:……………………..NTC 4,7 kΩ
Homologation LPG No.:......................... E4 67R-010218
Shut off valve specifications:
Type:…………………….…Valtek 07 BFC
Coil tension:………………….…..12V DC
Power of coil:……………………..….11W
Normally:……………………….…..Closed
Homologation LPG No.:..E4 67R-010041

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1.6.4 Pressure regulator installation instructions:
The following rules relate specifically to the installation of the pressure regulator:
•Install the regulator in such a way that it is accessible for maintenance and adjustment purposes.
•Never install the pressure regulator directly on the engine or on components located on the engine.
•Install the pressure regulator with the adjustment side at the top, unless otherwise specified in the installation
manual.
•Remove ALL plastic protection plugs from the pressure regulator.
•Connect the coolant hoses as indicated. The coolant nipples on the pressure regulator can be turned to ensure
proper routing of the coolant hoses.
•Secure the coolant hoses using the supplied hose clamps.
•The other ends of the coolant hoses are connected parallel to the heater hoses by means of T-pieces.
•Ensure there are no kinks in the coolant hoses. Proper and even heat exchange is necessary in order to allow
the LPG to evaporate.
•Install the pressure regulator below the highest fluid level of the cooling system to avoid air bubbles.
•Once the system has been installed, the engine must be allowed to warm up so that the heating of the
pressure regulator and any eventual coolant leakages can be checked.
•Every time the cooling system is drained, it must be filled and bled in accordance with factory specifications.
•Check the heating of the pressure regulator and for possible water leakage, by letting the engine run idle.

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1.7 Gas filter-unit
The filter has the function of filtering the LPG in the gas phase.
The input of the filter is connected to the output of the pressure reducer using
a tube with an internal diameter of 14 mm. The filter contains a replaceable filtering
Technical specifications:
Weight 75 g.
Degree of filtration 10 micron
Maximum working pressure 3 bar
LPG type approval N°: E13 67R-010278 class. 2A
Filter-unit installation instructions:
- Place the filter unit as close as possible to the injector rail and not too far from the reducer. The maximum
length of the tube between reducer and filter is 70 cm, while that between the filter unit and injector rail is
25 cm.
- Avoid the gas tubes passing close to thermal conduction points, in order to protect them and not heat the
gas.
- Fit the gas tubes as shown in the figure. The 14-mm tube A on the input coming from the reducer and the
14 mm tube B on the output that brings the gas to the rail.

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1.8 Gas Injector Rails
1.8.1 Injectorrail Landi GI
The LPG, coming from the filter, enters fitting A and feeds the injectors. Appropriately dosed, the gas exits the
injectors through nozzles B and reaches, through a suitable connector, the suction manifold and, thus, the engine.
The injectors are driven by the gas ECU and are connected to it through the connectors D.
The gas pressure and temperature are measured by sensor C.
Technical specifications:
Weight (4-cylinders):…………………….. 850 g.
Injectors per rail:………………….…….2, 3 or 4
Response time:………………….…1.7 ms ± 0.2
Working temperature:………….-40 to + 120° C
Maximum working pressure:………………3 bar
Injector approval N°:………… E13 67R-010234
Injectors rail approval N°:…… E13 67R-010233
Driving method:………………….Peak and Hold
The injector comes in three different sizes,
depending on the power of the engine and
number of cylinders.
Ne can recognize the injectorsize from the color
of the cap on the injector.
Small = Green
Medium = Black
Large = White
The injectors are separately exchangeable.
Size Name Diameter
(mm) Power (kW/cil.)
Small (Green) GI-22-65 2,2 Until 15
Medium (Black) GI-25-65 2,5 from 15 until 30
Large (White) GI-28-80 2,8 from 30 until 40
Legend:
1. Gas inlet with filter
2. Gas outlet
3. Electrical connection
4. Inlet filter
5. O-ring

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1.8.2 Injector rail AEBINJ
Specifications:
Name:………………………….….AEBINJ
Coil tension:…………………..…..12V DC
Nominal power:…………………..….41W
Normally:……………………...…..Closed
Injectors per rail:……………......2, 3 or 4
Approval LPG No.:……E13 67R-010290
Approval CNG No.:……E13 110R-00123
NOZZLE TABLE FOR LPG POWERED VEHICLES
Information is calculated based on 1 bar pressure
4 CYL.
Nozzle Diameter Displacement
Ø1,8 mm Below 1100 cc
Ø2,0 mm Up 1100 to 1300 cc
Ø2,2 mm Up 1300 to 1600 cc
Ø2,4 mm Up 1600 to 2000 cc
Ø2,6 mm Up 2000 to 2200 cc
Ø2,8 mm Up 2200 to 2400 cc
Ø3,0 mm**** Over 2400 cc
8 CYL.
Nozzle Diameter Displacement
Ø2,2 mm Below 3000 cc
Ø2,4 mm Up 3000 to 4000 cc
Ø2,6 mm Up 4000 to 5000 cc
Ø2,8 mm Up 5000 to 5700 cc
Ø3,0 mm**** Over 5700 cc
3 CYL.
Nozzle Diameter Displacement
Ø2,2 mm Up 900 to 1100 cc
6 CYL.
Nozzle Diameter Displacement
Ø2,2 mm Below 2600 cc
Ø2,4 mm Up 2600 to 3000 cc
Ø2,6 mm Up 3000 to 3500 cc
Ø2,8 mm Up 3500 to 4000 cc
Ø3,0 mm**** Over 4000 cc
ATTENTION: 3.0 diameter nozzles have a larger
O-ring do not mix with others.
The AEB injectorrail is available with 2, 3 or 4 injectors in one complete rail. The oulet nozzle is exchangeable, and
is available in different diameters, which makes the rail adjustable for the required power.
The table below indicates which nozzle size to use, based on number of cylinders and engine displacement.
A simple way for understanding if the nozzle is of the correct diameter.
1) Complete a correct calibration using GAS.
2) Bring the vehicle to idle while running on GAS.
3) Check the GAS injection time:
The nozzle is correct if the injection time is between 4.5 ms and 6.0 ms, the nozzle is too large if it is under 4.5 ms
and too small if it is over 6.0 ms.
Legend:
1. Gas inlet (cmming from gasfilter)
2. Injector nozzle (exchangeable)
3. Electric connection per injector (AMP super seal 2 way)
4. Tube connection for gas pressure sensor
5. Rubber bracket for fixation
6. Gas temperature sensor (NTC) (Sicma 2 way connector)

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1.8.3 Injector rail Valtek Type 34
Specifications:
Coil tension:…………………..…..12V DC
Nominal power:…………………..….55W
Normally:……………………...…..Closed
Injectors per rail:……………......2, 3 or 4
Approval LPG No.:…… E4 67R-010196
Outlet nozzle size:……. Ø 1,5 to 2,8mm
Injector Layout:………… 2,3,4 cylinders
Temperature sensor:…………NTC type
Working temperature:……-40°C÷120°C
Maximum service pressure:…… 4,5 bar
Opening time:.1,7÷1,8 ms @1bar-13,5V
Closing time:...0,9÷1,0 ms @1bar-13,5V
Coil resistance:……….2,5±0,1Ω@20°C
Current control:………….Peak and hold
The Valtek Type 34 injectorrail is available with 2, 3 or 4 injectors in one complete rail. The oulet nozzle is
exchangeable, and is available in different diameters, which makes the rail adjustable for the required power.
Please refer to the table shown before (Injectorrail AEBINJ) that indicates which nozzle size to use, based on
number of cylinders and engine displacement.

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1.8.4 Injectorrail installation instructions
Follow the procedures for installing the injector rail, as shown below:
- The injector rail has two 6mm holes for fitting the unit using the support provided in the kit.
- It will be necessary to place the tubes with the 6-mm interior Ø on the injector output to connect the injector
with the nozzle placed on the inlet manifold. (see Chapter that describes the nozzle)
- There is a tight correlation between the location of the injector rail and the nozzles.
- Place the injector rail close to the inlet manifold in such a way that the connection tubes can be as short as
possible and so that the nozzles can easily be connected without kinks.
- The injector rail/manifold tubes must be no longer than 18 cm.
- The difference in length between the tubes must not be greater than 4 cm.

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1.9 Nozzles
A nozzle is mounted in each cylindre’s individual inlet channel of the inlet manifold and connected to the injectors
by means of a suitable tube.
Technical specifications:
Calibrated pass-through hole: Ø 4 mm
Connection to the fuel rail: outside Ø 6 mm
Manifold connection: M6 x 1 thread
1.9.1 Nozzle installation instructions:
The correct installation of the nozzles is crucial for the good operation of the engine. These must be installed
exclusively with the prior removal of the manifold.
- Dismantle the suction manifold taking care not to damage the gasket. Carefully note the connections and
assembly of all the components installed on the manifold.
- Following the instructions provided on the “vehicle cards,” make the holes for installing the nozzles on the
manifold.
- In the event that no vehicle card is available to define the positions of the nozzles, place them as close as
possible to the petrol injector.
- Mark the points to be drilled.
- Before making the holes, punch the exact points where the holes will be made.
- Apply grease to the point of the drill bit so as to avoid spreading swarf, then drill using a 5-mm bit if the
suction manifold is made of aluminum alloy. In the case that the inlet manifold is plastic, use a 4.8 mm bit.
During drilling, it is important to keep the drill in a perpendicular position with respect to the surface to be
drilled.
- Tap a thread with a male M6x1.
- Carefully clean the inlet manifold and remove all the drilling swarf.
- Take care not to damage the threads in tightening the fittings.
- Use a drop of brake thread sealant in the coupling to improve the grip.
- Reassemble the inlet manifold and use new manifold gaskets, if necessary reassemble all the components
previously removed during the course of the dismantling operation.
1.10 Water temperature sensor
This sensor is used to measure the engine temperature. This signal is used by the ECU to determine when to
switch over to gas.
The electric signal is sent to the ECU as part of a string of information necessary for the engine running on gas.
Technical specifications:
Weight 71 g.
Tube connection 15 mm
Sensor type 4.7 ohm
Connector IP 54 type SICMA 2
Legend:
1. Water hose connections
2. NTC temperature sensor
3. Electrical connection
Installation intruction Temp. sensor:
The temperature sensor is fitted on the cooling
circuit just upstream of the pressure regulator.

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1.11 Pressure- MAP-sensor AEB025
Specifications:
Name: AEB025
LPG type approval N°: E3 67R-01 0216
The four wire connection (with 4way superseal connector) is for :
- +5V feeding
- Ground
- Vacuum signal (0 – 2,5 bar)
- Pressure signal (0-4,5 bar) Class2
This component is used in bifuel LPG vehicles. It measures
pressure after pressure regulator and vacuum at manifold.
Pressure signals are changed in electrical signals in the way
that they can be analyzed by ECU. The AEB 025 Double Map sensor is suitable to manage two different pressure
signals: one from manifold (V) and one from injector rail gas pressure.
1.11.1 MAP-sensor installation instructions:
•Check whether an original unused connection point is available.
If no such point is available;
•Detach the inlet manifold, ensuring that the gasket is not damaged and take note of any components and
connections.
•Determine the position of the vacuum connection that will be made in accordance with the specific installation
instructions.
•If not explicitly specified in the installation instructions, personally determine an easily accessible connection
point, preferably just behind the throttle valve.
•First determine the centre before drilling the hole.
•Apply some grease around the drill bit to prevent the shavings from flying around and drill a 4.8-mm hole in
case of an aluminium manifold and a 4.5-hole in case of a plastic manifold. While drilling, it is important that the
drill is held at a right angle to the surface.
•Tapping screw thread M6x1.
•Carefully remove all drill shavings.
•Install the vacuum connecting nipple using sealant/adhesive fluid.
•Only install the inlet manifold once the nozzles have been mounted.
•Reinstall the inlet manifold, with a new gasket if required, and connect all detached components again.
MAP-sensor connection OK MAP-sensor connection NOT OK

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1.12 Gas-ECU
The Electronic Control Unit (ECU), also referred to as the brain of the system, controls the system. The key
functions of the gas system ECU are:
1. Detection and processing of original engine management signals:
a) Petrol injectors
b) Coolant temperature
c) Engine RPM
d) On-board voltage
e) OBD-communication (Option)
2. Detection and processing of gas system signals:
a) Gas pressure
b) Manifold pressure
c) Gas temperature
d) Tank level sensor
e) Selected fuel type
3. Controlling of flow valves
4. Controlling of gas injectors
5. Deactivation of petrol injectors
6. Serial communication with the selector switch
7. LPG level indication
8. Controlling of buzzer
9. System monitoring and diagnosis
10. Communication with interface software (PC).
The firmware (software strategy) memory and the configuration memory can both be reprogrammed. This means
that in the case of software upgrades, management strategy and calibration can be modified by reprogramming the
memory of the ECU.
There are 5 different hardware versions available. The choice depends on the application, size of the engine and
the budget of the installation.
- Landi Omegas 4 Cyl.
- Landi Omegas 8 Cyl.
- AEB 4 Cyl. Mono Plug
- AEB2001 4 Cyl. (Bi Plug) (OBD)
- AEB2568D 8 Cyl.