Autogas LPG conversion does not require changes in the engine

      LPG autogas conversion works in exactly the same way as a normal petrol(diesel) engine, only the conventional fuel is replaced with autogas LPG. Everything about the vehicle remains the same but a separate autogas  fuel system is added.
Converted vehicles become “dual-fuel” - you can change between running on petrol (diesel) or LPG autogas , even whilst on the move.  LPG autogas tank constructed from steel is fitted in the boot. It is fitted with a multivalve. This unit comprises of a fuel gauge, a pressure relief valve, excess flow valve and various shut off valves. Tank is filled via a filling valve  located usually at the rear of the vehicle.

      The LPG autogas in liquid form is carried through plastic coated copper pipes to the front of the car. Here it goes through a filter and than to the autogas LPG or CNG reducer. At this point it is converted to a gas ready for use by the engine. The flow of gas to the engine is controlled by an autogas ECU. This unit works alongside the car's own ECU constantly monitoring the exhaust emissions and adjusting the gas supply accordingly. This unit is self learning and adapts to different drivers and road conditions automatically.
A switch on the dashboard allows you to select the option of running on autogas or petrol(diesel). LPG autogas or CNG kits to convert petrol and diesel engines consist of the same components. But the process of adjusting and setting the system looks different, cars with diesel engines requires more experience and knowledge.


Autogas conversion diagram

figure 1.   LPG kit car conversion

1. LPG Autogas Tank

Safety : The Autogas LPG or CNG tank is made of High quality steel, EC Approved, secured with bolts to the floor of the vehicle and steel straps.

Location : Back end. There are two types of tanks Cylindrical or Donut type.
The Autogas tank is fitted secured in the boot of the car.

2. Autogas filling valve
3. LPG autogas Multivalve
4. Autogas LPG or CNG Reducer
5. CNG and LPG Autogas Injectors
6. Autogas ECU
7. Petrol <-> LPG Autogas switch
8. Filter
9. MAP Sensor