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that for the selected injection times the multiplier is too high (the mixture is too rich). In this case,
lower the multiplier value for the 5 [ms] injection time (in our case). If upon switching to LPG the blue
marker moves to the right, it means the mixture is not reach enough and the multiplier needs to be
brought up for given injection times.
The procedure described above should be performed for a few different injection times, starting at the
calibration point all the way until heavy load injections. You can check the multiplier map e.g. every 2
[ms] starting at the calibration point. If necessary, add a point at the multiplier map to set it more
precisely.
Once the manual setting is complete, both maps
– petrol and LPG – should match.
3.6. LPG temperature correction
If the petrol injection time changes when the LPG temperature is changed in the LPG mode, the LPG
temperat
ure calibration must be corrected. The correction may be made by means of the “LPG
temperature calibration map” (see 2.12).
However, it must be remembered that this operation may
be performed if the auto-calibration and the multiplier setting while driving have been carried
out correctly.
In order to make the correction in a proper way, the car must be started with a cold
engine. Then, beginning with the temperature of switching to LPG, the petrol injection time must be
checked and after switching to LPG the petrol injection time should be compared. If the petrol injection
time value is bigger after switching to LPG, the positive correction must be made for this LPG
temperature value (the LPG temperature calibration map must be brought up). If the petrol injection
time value is lower after switching to LPG, the calibration map for a given LPG temperature value must
be brought down. The calibration map must be set in such a way as to ensure that the petrol injection
time remains the same after switching from petrol to LPG. In order to set the LPG temperature
calibration map correctly, the procedure described above must be repeated for the full range of LPG
temperature values in 5 [°C] steps.
3.7. Intelligent gas level indicator
The function is supported by all Q-generation controllers (Q-max, Q-box, Q-next), but its operation
requires the use of the WPGH-type gas level indicator.
This function is used to indicate the level of gas to the user more precisely (on the LED switch panel)
without the impact of the terrain slope. It is particularly important in the mountain area, where long
uphill driving or long downhill driving results in indications that do not represent the actual gas amount
in the tank. This problem should be eliminated by the described function.
Perform the following steps to use the function:
1. Perform WPGH level indicator auto-calibration.
2. Use all gas in the tank.
3. Fill up the tank to full.
4. Use all gas in the tank.
When the above-mentioned steps have been performed, the displayed gas level will be calculated
based on the actually used gas, instead of the WPGH indicator signal.
Note that it is not possible to measure the exact amount of the gas and the
number of gas fuel liters to be filled to an empty tank depends on many factors
and can vary even wit
hin ±15% at the same voltage value from the WPGH
indicator. This leads to an error that is not possible to be eliminated without
user's action.
