DESCRIPTION OF THE "CONVENTIONAL CNG" KIT FOR A CARBURETTOR VEHICLE

DESCRIPTION OF THE "CONVENTIONAL CNG" KIT FOR A NON-CATALYTIC INJECTION VEHICLE

The CNG reaches the regulator ( 1 ) at a pressure of 220 Bar (22.000 kPa) through the CNG solenoid valve ( 2 ) which is only open when the vehicle is running on gas. The pressure of the CNG is reduced inside the regulator and is in-taken by the engine through the mixer ( 3 ), which is specific for each individual vehicle and fitted upstream from the throttle. The mixer allows the gas to mix perfectly with the air to create an even mix. Considering that the kit is standard, a maximum pressure register ( 4 ) is to be fitted on the connection hose between the regulator and the mixer which, together with the adjustment screw on the regulator, enables the installer to perfectly set and adjust the system. When the vehicle is running on gas the flow of petrol is intercepted by an electric relay or electronic emulator ( 5 ), which stops the original petrol electro-injectors. The relays or emulators are specific according to the type of petrol system. The choice of the fuel on which the vehicle is to run (CNG or Petrol) is completely up to the driver who can choose the fuel by operating the switch ( 6 ) fitted in a handy position inside the vehicle compartment. This switch can also be equipped with a fuel indicator.

DESCRIPTION OF THE "CONVENTIONAL CNG" KIT FOR A CATALYTIC INJECTION VEHICLE

The CNG reaches the regulator ( 1 ) at a pressure of 220 Bar (22.000 kPa) through the CNG solenoid valve ( 2 ) which is only open when the vehicle is running on gas. The pressure of the CNG is reduced inside the regulator and is in-taken by the engine through the mixer ( 3 ), which is specific for each individual vehicle and fitted upstream from the throttle. The mixer allows the gas to mix perfectly with the air to create an even mix. Considering that the kit is standard, a maximum pressure register is to be fitted on the connection hose between the regulator and the mixer which, together with the adjustment screw on the regulator, enables the installer to perfectly set and adjust the system. Considering that the vehicles are catalytic ones, a fuel adjustment control
system must be installed in the system. This system is equipped with an electronic control unit ( 7 ), which commands an actuator ( 4 ), fitted on the connection hose between the regulator and the mixer, ensuring the perfect stoichiometric ratio of the mix, based on the lambda signal sent to the Gas electronic control unit by the original petrol lambda probe. When the vehicle is running on gas the flow of petrol is intercepted by an electric relay or electronic emulator ( 5 ), which stops the original petrol electro-injectors. The relays or emulators are specific according to the type of petrol system. The choice of the fuel on which the vehicle is to run (LPG or Petrol) is completely up to the driver who can choose the fuel by operating the switch ( 6 ) fitted in a handy position inside the vehicle compartment and which is already equipped with a fuel indicator.