Conversion to Autogas consists of 'bolt on' parts with no modifications needed to the engine, carburettor or fuel injection equipement. The vehicle starts on petrol to make sure that the fuel lines do not dry out and then switches over automatically
to Autogas.

Fuel Filling - A one way valve is fitted to the filler for safety and adaptors for the Italian type, Dutch type and the ACME threaded type are available

Autogas tank - these are designed for the type of fuel used.
They are made from steel and are designed for use with Autogas. Tanks can only be filled to a maximum of 80% to allow for the expansion of gas with increases of ambient temperature. This is an automatic function. There are two types of Autogas tanks, the first being cylindrical and fits in the boot and the second type is a doughnut shaped one that fits where the spare wheel sits. There are various types of under floor and specialist tanks available and being developed.

The illustrations below are of typical 'mono point' components.

Autogas Fuel Level Indicator - A fuel level indicator is fitted to the Autogas tank valve and an electronic sensor relays this information to the display. This display is incorporated into the selector switch. Reducer - from the Autogas tank, the liquid gas is piped underneath the vehicle to an electro solenoid shut-off valve located in the engine compartment. This valve shuts off the gas supply when the engine is running on petrol or at any time the engine is not running. Close to this shut off valve is the reducer, sometimes called the regulator or vaporiser. This converts the liquid gas into a vapour, reduces the pressure and supplies gas to the engine when required.. The reducer is fitted with a safety cut off valve to prevent leaks when stalled or in an accident situation. This reducer is water heated. Stepper Motor Switchover and fuel readout LCD display Electro shut off valve

Tank Valves- The Autogas tank valves are enclosed in a gas proof case to isolate them from the boot and/or interior of the vehicle. This enclosure and vent pipes ensure that in the unlikely event of a leak, the leak is vented to the outside of the vehicle.

The Mixer - This is where the gas and air are mixed and come in many shapes and design.

The latest LPG systems completely eliminate the problems associated with 'mono point venturi systems', 'spit backs' and erratic running are now a thing of the past.
The new systems are true Multi-Point Sequential injection systems that emulate the original petrol injection system, ensuring that the vehicle runs the same on each fuel.