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2.4.9. LPG System
There are two solutions for connecting LPG signal: (1) binary signal or (2) lpg injector control signal. In both cases appropriate signal should be
connected at pin
A11
. UTCOMP auto-recognize current fuel type (petrol/lpg) and do independent measurements (distance and fuel consumption) for
both modes.
1. LPG binary signal (recommended)
This type of signal inform UTCOMP about current fuel type (low state 0V - petrol, high state 3V and more - lpg). It can be signal from LED
indicator or from LPG electrovalve. This solution is recommended for most vehicles with 4th generation of LPG system.
2. LPG injector control signal
This solution is recommended only for vehicles with factory LPG system (single ECU for petrol and lpg). In this case at pin A10 is connected
petrol injector control signal and at pin A11 is connected lpg injector control signal.
Only single injector should be controlled at the
moment
. Working injector indicate UTCOMP about current fuel type.
Both injectors should be controlled the same method
(both PWM- or
both PWM-). Common ECU guarantee that signal at pin A10 will not appear when there is already signal at pin A11.
2.5. Graphic display: LCD or OLED
Kit includes a graphical display with a resolution of 122x32 pixels for UTCOMP-3
3
and 256x64 pixels for UTCOMP-PRO. The display must be
connected to the UTCOMP using a dedicated ribbon tape. The tape has a special key so that it cannot be wrong side connected. Standard tape length is
60cm for UTCOMP-3 and 100cm for UTCOMP-PRO. To properly run, the display should be connected before power is connected to the device.
Due to the huge variety of mounting preferences of users, the display is supplied without housing (there is possibility to buy enclosure too). Take
special care during installation. Do not use any glues or substances that can conduct electricity. If you use two-component epoxy adhesives avoid
electrical pads. Before connecting the display, wait until the glue completely dries (evaporate moisture). The display can be freely located in the car - it
all depends on the user imagination and dexterity. The most frequently used locations are around the center console/dashboard or in the instrument
3
There are two version of UTCOMP-3: LCD and OLED
