LANDIRENZO OMEGAS Multipoint injection system

This CNG system is coming with LIANA CNG and is the latest gen in CNG technology.




LANDIRENZO's OMEGAS multipoint sequential injection system represents a new generation of bifuel (gasoline � CNG) CNG conversion system.The principle used by the CNG ECU to calculate the injection timing applied to the CNG injectors, is based on the acquisition of the gasoline injection timing by CNG ECU during CNG mode.The engine management is, therefore, mainly left to the gasoline ECU whilst the CNG control unit translates gasoline actuations into an appropriate control for CNG injectors.In order to maintain the coherence with the gasoline system, the CNG ECU drives CNG injectors in the same sequence as gasoline injectors.Roughly, the CNG ECU converts an amount of energy that should be actuated by the gasoline into an equivalent amount of energy that CNG has to release in order to compensate the differences between two fuels.LANDIRENZO OMEGAS can use different types of injectors according to the specifications of the application.LANDIRENZO OMEGAS is minimally invasive with respect to the original gasoline engine management system.It is able to be easily integrated with the main engine management functions as mixture control, cut off, EGR, purge canister, etc and auxiliaries engine management functions as air-conditioning, power-steering, electric loads, etc.. The CNG ECU is able to calculate CNG injection timing using specific information as CNG injector rail pressure, CNG temperature, engine coolant temperature, engine RPM and battery voltage, in addition to the inputs of the gasoline ECU.


Components


Regulator


This is a compensated, two-stage diaphragm type regulator, with water-gas heat exchanger, filter, gas solenoid valve and safety valve. It is calibrated for a supply pressure that is 2 bar (200 kPa) above the pressure of the intake manifold.
The nominal flow rate is 30 Kg. / h


Switch - Indicator


Electronic control module with the following functions:
i 2 positions LPG/gasoline switch and monitoring of the current fuel in use using two illuminated led;
ii monitor of the level of LPG in the tank using 5 illuminated led.
The switch is also equipped by an acoustic signal (buzzer). This buzzer is switched on when the system is switching into gasoline mode when a low level of CNG pressure is detected or a fault into CNG system occurs.


Electronic Control Unit


The injection control strategy and in particular LPG injection timing is calibrated using a look up table that is function of RPM and gasoline injection timing. The LPG pressure in the rail and the LPG temperature information is used to modify injection timing calculates by the main look up table. The coolant temperature information (coolant temperature sensor is installed upstream of the pressure regulator) is used to switch from gasoline to LPG in start up phase. Above mentioned switch is also controlled by a delay time from the start up and a minimum rpm threshold. The LPG system also includes diagnostics strategies and manage the automatic switch into gasoline mode in case of fault detections. The ECU is available in two versions for 4 or 6/8 cylinder engines.


Gas filter


This is located between the regulator and the injector rail and it is used to filter the gaseous-state CNG.
The filter contains a cartridge that guarantees 80-_m. filtering capacity.Maximum operating pressure is 250 kPa.


Injector rail


The CNG fuel stored in the rail is injected by CNG injectors into the intake manifold.
The injectors are driven by the CNG ECU. The rail allows to install 3 or 4 injectors in order to cover the entire range of possible applications.
CNG pressure and CNG temperature are measured into the injector rail.
The injectors are driven with a "peak and hold" actuation. Maximum operating pressure is 250 kPa.