Installation and adjustament manual
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DESCRIPTION
2. INPUT SIGNALS
2.1 MAP (Manifold Absolute Pressure)
The MAP input signal is used as a reference for :
-
managing the mapping in combination with the RPM
input. The mapping determines the position of the
step- motors in the Proportioner.
-
managing the fuel working pressure from the
Regulator-Vaporizer as a function of the engine load.
2.2 Engine RPM
The RPM signal is read by the ECU for managing the
mapping, which in turn determines the correct position of
the step-motors in the Proportioner and handles the fuel
cut-off.
2.3 TPS (Throttle Position Sensor)
The TPS signal informs the ECU on the throttle position
and is mainly used for fuel enrichment during transients.
During acceleration phases the ECU uses appropriate
opening strategies for the step-motors of the Proportioner,
in order to get the injection system to promptly react to
the engine’s greater fuel demand.
During the deceleration phases the ECU operates the cut-
off electrovalve in order to reduce the amount of fuel
delivered to the engine, this way optimizing emissions
and engine braking effect.
2.4 Lambda sensor (Oxygen Sensor)
The Lambda signal informs the ECU on engine
combustion. To achieve the correct air-fuel ratio, it is
necessary that the air volume taken in by the engine
corresponds to the theoretical fuel volume required to
completely burn the fuel.
A value of Lambda > 1 indicates lean mixture.
A value of Lambda < 1 indicates rich mixture.
The Lambda signal is used by the ECU for setting the
proper gas output to the engine.
2.5 Regulator-vaporizer temperature
The Regulator-Vaporizer temperature signal is used for
setting the automatic change-over from petrol to gas . Once
the programmed temperature is reached by the Regulator-
Vaporizer, the ECU performs the fuel change-over .
3. COMPONENTS
In the figure 2 all the components of the conversion are visualized:
1)
Regulator-Vaporizer
2)
Proportioner
3)
Distributor
4)
ECU
5)
Gas/petrol switch and fuel level indicator
6)
Multivalve
7)
Filling point
8)
LPG tank
Fig.2
