G-Tron; Natural Gas Engine - Audi A3 Sportback g-tron Owner's Manual

102 g-tron
g-tron
Natural gas engine
Introduction
Applies to vehicles with natural gas engine
Your vehicle will run on CNG (Compressed
Natural Gas) and petrol. The fuel mode is
changed over automatically.
Using compressed natural gas (CNG)
In addition to petrol, vehicles with a natural
gas engine will run on either CNG, e·gas or
biomethane.
The tank must NOT be filled with any other
ava ilable types of fu:el, such as LNG (Liquefied
Natural Gas), LPG (Liquefied Petroleum Gas)
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or hythane (a mixture of hydrogen and
methane)
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Natural gas quality and fuel consumption
Natural gas is subdivided into two quality cat·
egories: Group H and Group
L.
H-gas has a higher methane content and thus
a higher calorific value than L-gas. The higher
the calorific value of the natural gas, the low-
er the fuel consumption.
However, the methane content and the calo-
rific value can vary within the same quality
group. Consequently, the vehicle's fuel con-
sumption can vary even if the gas tank is al-
ways filled with fuel of the same quality.
The quality of the natural gas is detected au·
tomatically. The engine management system
adapts the vehicle set· up to variations in natu-
ral gas quality. It is therefore possible to mix
both quality groups in the gas fuel tan k.
It
is
not necessary to run the gas tank dry before
filling up with natural gas of a different quali-
ty group.
Safe operation of natural gas powered
vehicles
If you notice a gas odour or suspect that the
natural gas fuel system may be leaking,
please follow the instructions below
Q
& .
- Stop the vehicle Immediately.
- Extinguish any cigarettes immediately.
- Switch off the ignition .
- Open all the doors and the boot lid to en-
sure an adequate supply of fresh air.
- Switch off or remove from the vehicle all
items which could cause sparks or fire.
- Do NOT drive on if the gas odour persists.
- Obtain professional assistance and have the
fault rectified .
A
WARNING
- Serious personal injury can result if you
ignore a gas odour inside the vehicle or
when filling the tank.
- Follow the instructions above
~ page
102, Safe operation of natural
gas powered vehicles if you notice a gas
odour.
- Leave the danger area .
- If necessary, notify the rescue services.
- Natural gas is highly explosive and highly
inflammable. Improper use of natural
gas can cause accidents, serious burns
and other injuries.
- The vehicle is not suitable for the use of
liquefied natural gas (LNG) or liquefied
petroleum gas (LPG) and must never be
fuelled or driven with LNG or LPG. Lique·
fied gas can cause the natural gas tank
to explode and can cause serious injuries.
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CAUTION
The vehicle is not su itable for the use of
hythane and must never be fuelled with
hythane. Otherwise, serious damage to
the engine and fuel system could result.
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Note
Have the natural gas fuel system checked
at regular intervals by a qualified work·
shop.