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have been used in motor vehicles throughout the world for many years, Proving to be a reliable and Lpg as a safe motor fuel, Engines last longer running on gas as there is No carbon deposits in Lpg fuel, Engine oil stays cleaner - lasting longer and so protecting the engines, No major modifications are required to the engine or system to run a vehicle on Lpg gas.
Conventional Systems Work By
Supplying gas into the engine via a mixer unit this is normally fitted just before the carburettor or on injection engines just before the butterfly throttle valve, Air passed through the venturi of the mixer causes a suction this draws gas from the vaporizer unit to supply gas through the mixer to the engine under demand as and when required. conventional systems are suitable for carburettor & older injection engines on some vehicles up to 1999 then gas injection should only be fitted due to more advanced engine sensors, emission control & plastic manifolds, etc.
Carburettor Engine Conversions
throughout the years carburettor engines still use basically the same type of system with only a few modifications being made to parts over the years for more reliability and safety, parts such as electronic control switches controlling the electric fuel shutoff valves, digital fuel gauges, safety shutdown, etc. Lambda control systems can also be added to carburettor engines to continuously correct the gas mixture & emissions to maximise the mpg while running on Lpg gas.
Injection Engines
Some Pre 1999 vehicles can also be fitted with a conventional type system by adding such items as a lambda control system to correct emissions and control the vehicles Ecu & sensors, sometimes other parts are required such as memory relays, OBD11 fixes to fall the vehicles Ecu & sensors, etc. vehicles from 1999 onwards should only be fitted with gas injection to comply with Euro3 & 4 emissions & to protect the engine & vehicles system, etc...
How a Conventional System Works
LPG liquid is stored in a tank the tank is fitted in the rear or under the vehicle, Lpg tanks are far stronger than conventional petrol tanks they are normally made from 3 to 4 mm of steel so they are very strong & very safe. filling of the Lpg tank is done at a garage similar to filling your petrol tank, the filling entry unit is fitted in the vehicles body, bumper or tow-bar, The tank is fitted with a multi valve unit, this unit controls the liquid gas level inside the tank and incorporates many safety features, Lpg is supplied from the tank through a copper fuel pipe to the engine bay to the vaporizer unit, this unit is heated by the engines water coolant system as Lpg enters the vaporizer unit it turns in to a gas vapour & reduced to a low pressure, Gas is then drawn by suction to the engine under demand through a gas hose to the mixer unit & into the engines air intake, gas and air are mixed in to a usable fuel to power the engine, the system is controlled by an internal dash safety switch unit which also incorporates an led tank fuel gauge the driver can select Lpg or petrol at any time even while driving, some vehicles will also require other parts such as Lambda controls to control emissions, obd11 fixes to fall sensors, emulators units to turn on & off petrol injectors, etc...
How a Gas Injection System Works
LPG liquid is stored in a tank the tank is fitted in the rear or under the vehicle, Lpg tanks are far stronger than conventional petrol tanks they are normally made from 3 to 4 mm of steel so they are very strong & very safe. filling of the Lpg tank is done at a garage similar to filling your petrol tank, the filling entry unit is fitted in the vehicles body, bumper or tow-bar, The tank is fitted with a multi valve unit, this unit controls the liquid gas level inside the tank and incorporates many safety features, Lpg is supplied from the tank through a copper fuel pipe to the engine bay to the Reducer unit, this unit is heated by the engines water coolant system as Lpg enters the reducer unit it turns in to a gas vapour and reduced in pressure, Gas is then supplied under pressure to the gas injectors fitted in the engines manifold near the petrol injectors, the gas injectors work just like petrol injectors the are controlled by a gas Ecu to fire gas vapour into the engine as & when require to power the engine, the petrol injectors are turned off by the gas Ecu the signals from the petrol's Ecu to the petrol injectors are used to control the gas injectors via the gas Ecu, on some vehicles like GDi engines (direct petrol injection) the Lpg injection system must also inject a small amount of petrol while running on Lpg to protect the engine & petrol system this is also required with some other vehicles like engines with soft engine valves like some Honda, Ford, Jaguar, Vauxhall engines, etc. Note only the Vogas gas injection system can do this! the system is controlled by an internal dash safety switch unit which also incorporates an led tank fuel gauge the driver can select Lpg or petrol at any time even while driving,
