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Gaseous Fuel Systems
In a low-pressure system, the
ordering of components is reversed,
with the carburetor located upstream
of the turbocharger. Refer to Figure
7. In this order (carburetor before
turbocharger), the carburetor does
not have to manage the boosted air
stream, so fuel supply pressure
requirements are much lower. Low-
Application and Installation Guide
pressure gas fuel systems operate
on gas supply pressure ranging from
7 kPa (1 psig) to 70 kPa (10 psig)
depending on the engine model.
The low-pressure system is often
used in situations where gas supply
pressures at a particular site are
limited, either by building code or
by the gas supply source itself.
Low-Pressure Gas Carbureted Fuel System
Figure 7
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