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SWITCHING TO PETROL FOR LOW GAS TEMPERATURE
If the temperature of GAS falls below the threshold set, the ECU switches to the petrol mode and
the corresponding diagnosis is activated (code S110). The ECU automatically back to gas mode
when the gas temperature allows it
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ANTICIPATE INJECTION SEQUENCE.
This is a guided procedure allowing the automatic acquisition of the injection sequence, as well as
the enabling of an advance phase shift of the gas injection; the entity of the phase shift depends
also on the command “Number of main bearings” of the page F3 Sensors.
This advance can increase the car operation above all in case of gas injectors far from the suction
manifold.
This function is to be used only if really necessary, since it disables the characteristic of GRA-
DUAL PETROL-GAS switching performing such switching instantaneously.
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IDLE OPERATION.
GAS
- By enabling this function, the car at minimum always works by GAS feeding (default and
suggested option).
CHANGE BACK TO PETROL
- During the return to minimum the car switches for some
seconds to petrol and then returns to gas feeding, avoiding in some cases the shut-
off during this phase. It is suggested to use this function only if necessary. The va-
lue “Revolutions for identifi cations of the minimum (Giri per identifi cazione del mi-
nimo)” determines the number of revolutions under which this procedure is enabled.
PETROL
- The operation at minimum, under the set value of revolutions, is always by petrol fe-
eding. The restoration of gas operation occurs when the revolutions exceed the set value. This
function has to be used only when the operation at minimum by gas feeding is impossible, insta-
ble and results in frequent shut-offs.
The indication that the system is working by petrol feeding does not occur by means of indication
on the switch that remains on gas feeding, but by the reading on the computer of the gas injection
time that becomes null.
In fact, in this phase the switch keeps signaling the gas operation and the gas solenoid valves
remain enabled.
In case of presence of the advance converter, which remains fed in this phase, it is necessary to
pay attention that introduced advance does not disturb the operation of the system.
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OPERATION AT HIGH REVOLUTIONS
GAS
- The car works on gas. If the gas time limit is reached (gas exceeds the time of cyvle), a
small correspondent quantity of petrol is added at the same time. The signalling on the switch
remain on gas operation.
Removing the cue from the check box you disable this function and if the gas time limit is reached
the car automatically changes back to petrol with consequent signalling on the switch.
PETROL
- The car temporarily runs on petrol mode at high rpm and high engine loads.
You can set the number of rpm and the injection time over which car will run in petrol: both condi-
tions must be met to run on petrol mode.
In this case, the switch is on gas mode
PETROL CONTRIBUTION
– You can make a small contribution of petrol during gas mode. You
can set the injection time beyond which you can get the petrol contribution and set the millisecon-
ds of contribution.
This contribution is then subtracted from the petrol injection time before calculating the correspon-
ding gas injection time
