Principle of work:

    Natural gas comes out of the tank through the tank valve and goes to the engine compartment through a high-pressure pipe which is also connected to the refuelling system.
    The engine compartment contains the regulator where the pressure of the natural gas is reduced from 220 bar to the engine supply pressure. From the regulator the natural gas goes to the air/fuel mixer which, located on the intake manifold, meters the flow of gas according to the requirement of the engine (represented by vacuum generated in the mixing devices) so as to ensure optimum carburation in terms of driving, consumption and emissions.
    The high-pressure solenoid valve allows gas to flow only when the engine is running and the switch is in the gas position.
    During gas operation, the petrol solenoid valve cuts off the flow of petrol to the engine, whereas during petrol operation the flow of natural gas to the engine is cut off by the high-pressure solenoid valve.