fast_man_eng.pdf

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Installation manual
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Index
9.9.1 Advanced calibration .................................................................................... page 42
9.10.1 “Diagnostics flag” window ............................................................................ page 44
9.12.1 Map management: “Multipliers” directory ..................................................... page 45
9.12.2 Map management: “Petrol times” directory .................................................. page 46
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1.0
General recommendations
•
Before installing the gas system, disconnect the battery earth cable (unless specified to the
contrary by the car maker).
Attention: this may delete the car radio and telephone memories and jam the centralised
door locking and anti-theft systems. In this case, you may connect the battery temporarily.
•
Always smooth holes after drilling and apply anti-rust to the edges.
•
Apply silicon to each cable through-hole to prevent water from entering the interior.
•
Always soft solder connections without connectors to prevent the formation of false con-
tacts.
•
Always observe the current laws and/or regulations in the State where the LPG system is
mounted.
•
Remember that, as per the relative standards, all the assembly instructions refer to the
driving position.
•
Before assembling the “FAST” control unit, make sure the relative fuses are disconnected.
•
Do not wash the engine after installation.
ATTENTION
FAILURE TO OBSERVE THE INSTRUCTIONS CONTAINED IN THIS MANUAL MAY CAUSE
THE FAST SYSTEM TO WORK INCORRECTLY OR NOT WORK AT ALL. THIS MAY CAUSE
DAMAGE TO LOVATO COMPONENTS AND INVALIDATE THE WARRANTY.
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2.0
“FAST” gas injection system features
2.1
System description
The system comprises:
-
Tank
-
Multivalve
-
Safety lock-off valve
-
Reducer / vaporiser
-
Injector assembly
-
Electronic control unit
-
Compressed air connections
-
Gas temperature and pressure sensor
-
Wiring harnesses
-
Smart injector-cutter control unit
-
Switch
-
Buzzer.
2.2 Operating principle
The liquid LPG is stored in equilibrium with the vapour phase in a tank fitted with a multivalve.
Storage pressure depends on the composition and temperature of the fuel. The LPG is collected
in its liquid phase and delivered to the reducer/vaporiser along the pressurised piping to which
the LPG lock-off valve is fitted. The reducer/vaporiser is heated by the engine cooling water,
vaporises the fuel and adjusts its pressure, known as injection pressure, to a value that is propor-
tional to the pressure in the inlet manifold downline from the engine butterfly valve (M.A.P.). The
gaseous LPG then reaches the injector assembly controlled by the electronic control unit. The
LPG is batched by the injection time and phasing signal. This is determined by the electronic
control unit according to the signals from the engine and petrol supply system.
2.3
Precautions for fitters
-
The vehicle must be fitted with a four (4) cylinder engine with a capacity ranging between
900 and 2,250 cm 3 and a maximum power of 85kW.
ATTENTION
MAKE SURE THE ELECTRONIC PETROL INJECTION MANAGEMENT SYSTEM, ESPE-
CIALLY THE LAMBDA PROBE, IS IN PERFECT WORKING ORDER; ANY IRREGULARITIES
OR FAULTS MAY BE TRANSFERRED TO THE GAS INJECTION SYSTEM AND CAUSE IT
TO WORK INCORRECTLY.
•
Check the general condition of the car.
•
Check the signals required for conversion, especially the Lambda probe.
•
Follow the instructions in this manual with care.
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3.0
FAST system components
3.1
FAST kit components
The LPG 4-cylinder FAST Kit comprises the following components:
-
1 12 Volt E67R1 LPG lock-off valve,
-
1 FAST reducer complete with guarantee certificate,
-
1 galvanized reducer support,
-
2 aluminium brackets for control unit and injector assembly,
-
1 FAST injector assembly,
-
1 LPG filter,
-
1 FAST service bag,
-
1 length of 15x23 rubber water hosing,
-
2 lengths of 5x10.5 rubber “only air” hosing,
-
1 length of 12x19 E67R1 rubber hosing,
-
2 lengths of 4x10 E67R1 rubber hosing,
-
1 coil of 4x6 copper piping,
-
1 FAST electronic control unit,
-
1 EMU FAST injector-cutter control unit for emulating the petrol injection signal,
-
1 gas Temperature and Pressure sensor,
-
1 FAST wiring harness,
-
1 EMU FAST emulator wiring harness,
-
1 microswitch,
-
1 acoustic signal,
-
1 use and maintenance manual.
3.2
Description of parts
LPG lock-off valve
This electromagnetic device interrupts the flow of LPG when the en-
gine is stopped or when the fuel supply is switched to the petrol
mode.
Reducer / vaporizer
The reducer / vaporizer provides the heat required to vaporize the
liquid LPG from the tank and reduces and adjusts the pressure of the
LPG in its gaseous phase according to the pressure in the engine
intake system downline from the butterfly valve (MAP, short for Mani-
fold Absolute Pressure). This component is fitted with a temperature
sensor for the petrol / LPG switching procedure, an overpressure
valve and an adjustment screw for modifying the gas reduction pres-
sure.
“FAST” injector assembly
This component delivers the quantity of gaseous LPG determined
for each cycle by the electronic control unit to each cylinder. The
fuel supply is sequenced and phased by the lock-off valves con-
trolled by the electronic control unit.
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