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4.9. FUEL SYSTEM
GAS
The gas system design always conforms to the applicable regulations (UNE 60.620) and comprises the
following elements:
ERM. Gauge and meter panel built to the applicable standard for this type of engine to ensure a gas
supply under the set pressure conditions.
VALVE TRAIN. Set of elements comprising a hand-operated shut-off valve, gas filters, a pressure control
gauge, a double normally-closed solenoid valve to stop the gas flow to the engine and a venting line for
leaks control or electronic leak control, all consistent with the standard specifications.
CONNECTIONS TO THE ENGINE, by DIN flanges and homologated hoses in all cases.
ENGINE-MOUNTED PRE-CARBURATION PIPING designed with a minimum of development and
connections. In any case, the pipes are made to the installer's standards and checked for leaks during the
engine tests.
POST-CARBURATION AIR/GAS MIXTURE PIPING. The whole circuit has been mechanically sealed
with Viton O-rings (all rubber or silicone couplings have been suppressed).
ETHANOL
The ethanol fuel system includes:
ERM. Gauge and meter panel built to the applicable standard for this type of engine to ensure an ethanol
supply under the set pressure conditions.
VALVES Set of elements comprising a hand-operated shut-off valve, ethanol filters, a control pressure
gauge and a double normally-closed solenoid valve to stop the ethanol flow to the engine, all in
accordance with the specifications as required by regulation.
CONNECTIONS TO THE ENGINE in all cases by DIN flanges, NPT couplings and authorised hoses.
ENGINE-MOUNTED PIPING designed with a minimum of development and connections. In any case, the
pipes are made in accordance with standards and checked for leaks during the engine test phase. To
ensure sealing and avoid any incident, the solution adopted includes double layer hoses using a stainless
braid without any type of elastomer that deteriorates on contact with ethanol.
Both fuel systems (gas and ethanol) come equipped with the following additional safeguards:
"BACKFIRING" or "DETONATION" PROTECTION. In a gas engine, backfiring may happen when burning
of the fuel mixture takes place in the intake manifold because damaged valves do not seal the
combustion chamber hermetically. Detonation occurs if the mixture strength varies out of control or when
the mixture self-ignites in contact with hot surfaces.
Two forms of protection or safeguards have been adopted as a direct protection against these
phenomena. The mechanical resistance of the equipment (as regards intake manifold joints, ribs, etc) has
been increased with respect to the normal design specification (diesel type) and two pressure-relief
valves have been installed in the intake manifold to permit a pressure leak while preventing any overload
of the manifolds.
Indirect protection is provided by the engine's own control and regulating systems which have been
designed to protect the engine against erratic or abnormal operation.
PRODUCT INFORMATION
IC-G-D-60-003e
REVIEW OF COMPLIANCE WITH EUROPEAN MACHINERY
SAFETY REGULATIONS AND "CE" MARK
1.12
INDEX
DATE
D
May 2016
O&M_2.002211.810_A_10_2016
Dep. 2
4/7
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