manuale per l'installatore - 1/3 tipologie d'installazione - 2/3 software ...

ing of a map. There are three files:
• Petrol Map
• GAS Map
• Condition Map
To go from a file to another you
just have to click on the icon of the
file you need to display.
Each file consists of a table with
16 lines and 16 columns. Each cell
contains a contains the memorise
operating point according to rpm
and manifold pressure (MAP).
Particularly, the petrol map memorised
the petrol injectors duty cycle;
the gas map contains the memorised
gas flow according to the
petrol map and the extrapolation
algorithms while the condition map
contains the system operation conditions
according to the lambda
control carried out with petrol. It is
possible to set three different operation
conditions:
• Closed loop = 4, for the areas
regularly checked by the oxygen
sensor.
• Open loop = 5, for the areas
which are not under the oxygen
sensor control.
• Indefinite = 7, for the “border”
areas between open loop (full
load) and closed loop (controlled
oxygen sensor) that are
those areas when you can have
open loop or closed loop conditions
according to the engine
load.
According to the selected condition
the colour of the cells in the
petrol and gas map will be different:
• Green: for closed loop cells.
• Red: for open loop cells
• Yellow: for indefinite cells
The white ones (picture 5.19)
indicates the operation area
where the system is working. To
manually modify a cell value,
Pic. 5.19 - Setting up – self-learning
click on it, push the space-bar,
introduce the new value and
click on enter key.
The other parameters represent:
• RPM and MAP: they respectively
indicate the engine rotation
condition and the suction
manifold pressure (MAP)
• Petrol inj. DC: indicates the
petrol injection duty cycle
instantaneously taken from the
petrol injectors.
• Reference DC: indicates the
petrol injection duty cycle
expected by the map for the
specific operation point.
• GAS inj. DC: indicates the gas
injectors duty cycle.
• % error: indicates the average
difference between the petrol
injectors duty cycle and the reference
one. It is positive if the
petrol injectors duty cycle is
higher that the reference one.
This has to be interpreted as the
signal of a lean gas map or of a
petrol map with too low values.
46
A graphic showing the oxygen
sensor behaviour is represented
hereunder and it is very useful to
identify the open loop and closed
loop areas.
The “Cancel last Digit” key
allows to settle the previous values
again.
At the bottom of the screen
there are two sliding bars. On the
left we have petrol self-learning
speed; on the right the gas selflearning
speed . These allow to
modify, decelerating and accelerating,
the system self-learning algorithms.
For each parameter we
have 6 different speeds:
• Very fast
• Fast
• Medium
• Slow
• Very Slow
• Stopped
The control of a map centering
reliability consists of positioning in
different operation points with RPM
and MAP constant and check the