22 TP-7173 10/20
5.1 Gaseous Fuel System Concept (Single Fuel)
The gaseous fuel system uses a fuel solenoid valve to control the fuel flow to the direct acting electronic pressure regulator
(DEPR). The generator set-mounted DEPR reduces the fuel pressure as fuel passes to the fuel mixer.
The fuel mixer controls the ratio of fuel to air under varying load and speed conditions. Because the air-fuel mixer receives fuel
in a gaseous state, the air-fuel mixer does not have to vaporize the fuel.
Figure 3 Fuel Regulator and Valve, Typical
5.1.1 Natural Gas and LPG Conversion
Most gaseous-fueled models can be converted to operate on either natural gas or LPG fuel. The engine ECM has fuel tables
and spark advance curves programmed for both natural gas and LPG. To change the fuel type, change the electrical connections
between the fuel system and the engine ECM as shown in the following instructions and connection diagrams. A hang tag on
the fuel regulator may provide additional conversion setup information. Fuel conversion may decrease generator set output.
Refer to the respective generator set spec sheet for ratings based on fuel selection. Changing fuel does not alter the emissions
compliance of the generator set engine. Consult your local generator set distributor/dealer for additional information.
Note:
If a gaseous-fueled model has the fuel type changed (LPG to natural gas or natural gas to LPG), order a new nameplate from
an authorized distributor/ dealer with the updated ratings and attach to the generator set.
Be sure to review the respective wiring diagram for your specific model for possible special applications.
Note:
KG150 engines ordered for use with natural gas cannot be converted to operate with LPG fuel.
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