Under the Bonnet: Technical Aspects of Conversion
The following information is purely for the more technical minded people
who are interested in how the system is installed into the vehicle engine
Here is some basic information and pictures as to how the Etagas system
is installed in to the engine bay of a Renault Laguna 1600 16v.
Tartarini Etagas Pressure Regulator
A small compact pressure regulator is easily fitted into the tight engine
bay of most modern cars.
This unit controls the pressure of gas being supplied from the gas tank
under its own pressure and regulates the liquid gas down to vapour against
vacuum created in the inlet manifold.
Tartarini Etagas ECU
The Etagas ECU is the heart of the system and takes signals from various
engine sensors to enable the correct metering of the fuel to the engine.
A durable waterproof alloy case allows the ECU to be mounted in the engine
bay and with all the wiring sheathed in black, so the installation looks
professional and tidy.
Rapid processing of signals from the various engine sensors allows the
Etagas system to adapt to all driving styles and road conditions encountered.
The Etagas ECU acts in the same way as the modern day petrol
ECU in the case of an accident the Etagas system will shut down all supply
of fuel from the LPG tank; the same process as employed on modern day
Tartarini Etagas Distributor
Gas is supplied in vapour form from the regulator to the distributor mounted
on the engine via a cut-off solenoid.
Fuel is then adjusted by the Etagas ECU using the fine trim stepper motor
of the Etagas distributor before allowing the gas under pressure to be
injected into the engine inlet manifold in just the right amounts and
at just the right time.
Due to such small amounts of gas being injected the risk of an engine
backfire is eliminated resulting in smoother running and better engine
Tartarini Etagas Injector nozzles
The injector nozzles are calibrated carefully to the engine size and drilled
into the inlet manifold at the closest position to the engine cylinder
Special hoses are used with specific clips to ensure a good seal to the
nozzles and easy routing of the hoses.
This procedure is always best done with the manifold removed and on the
Through user friendly software the system can be configured to suit different
engine sensors encountered on the modern day vehicle engine.
A simple on the road calibration process ensures that the Tartarini Etagas
system is calibrated perfectly to each vehicle before final hand over
to the end user.
Here is a completed engine bay.