An overview of the LPG system

How LPG works

Converting your vehicle to LPG, provides your vehicle with an additional fuel system. Whilst the process is called a conversion, it is perhaps more precise to call it an enhancement, as the existing fuel system is left as is. The LPG system is added to the vehicle and can operate either as well as or instead fo the existing fuel system.

Everything about your vehicle remains the same, accept that it has an additional fuel system, is now greener and more economical to run. Some vehicle will experience and increase in the amount of power (due to the nature of the way LPG burns in the engine providing better combustion and more power – read more).

As an entire fuel system fuel system is added to your vehicle, an LPG system requires, a tank, its own fuel lines, a computer (Engine Control Unit) and fuel injectors.

Inside the car, a gauge and display/alarm mechanism is fitted to enable you to control the system and to alert you if required.

Below each part of the LPG system is explained.

LPG TANK

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

The tank is the largest and heaviest addition and is installed in the rear of the vehicle, securely fixed to the vehicle structure.There are two types of LPG tanks: Cylindrical, housed in the luggage compartment, or ring-shaped/ Toroidal, housed in the spare wheel well.

In all cases LPG tanks are made from heat treated HT steel and tested up to 30 bar pressure. Normal operating pressure is 2 to 15 bar. All tanks are certified by the manufacturer as complying with EEC requirements.

FILLER POINT

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

Converting your vehicle to LPG, provides your vehicle with an additional fuel system. Whilst the process is called a conversion, it is perhaps more precise to call it an enhancement, as the existing fuel system is left as is. The LPG system is added to the vehicle and can operate either as well as or instead fo the existing fuel system.

REDUCER/VAPOURISER

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

This is an important device located in the engine compartment. It allows the gas to be delivered at the correct operating pressure and temperature.LPG is delivered to the reducer as liquid and becomes gaseous when the pressure is reduced. In order to prevent freezing it is attached to the vehicles coolant system.

ECU(Engine Control Unit)

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

The ECU is a sophisticated computer controlled unit which operates the entire LPG system. The unit operates by interfacing with the vehicle`s own ECU so that performance and emissions control are maintained.

All ECU`s are fitted with a safety feature so that in the event of an accident, even with the ignition switched on, the solenoid valves will be closed automatically to prevent any gas leakage.

INJECTORS

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

There is one injector per cylinder. The injectors are the electromechanical instruments that precisely control the gas supply to be delivered to the engine. The injectors are controlled by the ECU which utilises signals from specific vehicle sensors.

LPG GAUGE

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

Converting your vehicle to LPG, provides your vehicle with an additional fuel system. Whilst the process is called a conversion, it is perhaps more precise to call it an enhancement, as the existing fuel system is left as is. The LPG system is added to the vehicle and can operate either as well as or instead fo the existing fuel system.

FILTER

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

Gas going from the reducer to the injectors is passed through a filter which has the important task of filtering gas impurities and preventing them from passing into the injectors.

It is very important that the filters are replaced with genuine BRC parts at the specified service intervals.

TANK VALVES

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

There are two types of valves used dependent on vehicle type. The valves control several functions. These include an 80% shut off for refuelling, a safety solenoid to cut the LPG supply, excess flow and safety valve.

There is also an electronic device which sends information about the fuel level to the switch.

SOLENOID VALVE

  • Image Description Tordial Tank
  • Image Description Tordial Tank
  • Image Description Tordial Tank

This device automatically isolates the gas supply line from the tanks to the engine. It includes a filter which must be changed periodically.The valve performs the important function of isolating the gas flow in the event of an accident, even when the ignition is switched on.

The fuel tank is also equipped with a similar valve.




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