OPERATION
TP-6901 3/16a Operation 15
Section 4 Operation
4.1 INTRODUCTION
The KG2204 and KG2204T are four-stroke internal
combustion engines certified to operate on either
Propane, Liquid Petroleum Gas (LPG) or Natural Gas
(NG). System configuration is factory preset for NG.
Instructions for switching to LPG are provided within
this section.
The fuel system on this engine is a closed loop design.
As the engine runs, sensors located at various points
within the system provide continuous operating
feedback to the Engine Control Module (ECM). The
ECM adjusts the engine speed, ignition timing, and fuel
supply in response to changes in the applied load,
surrounding air temperature, operating temperature of
the engine, and amount of oxygen present in the
exhaust.
Refer to the equipment Operation Manual for specific
information on how fault codes are displayed.
4.2 FUEL SYSTEM
Components
Fuel Shut-Off Valves
Figure4-1
The fuel supply contains two fuel shut-off valves
located upstream from the fuel connection point on the
engine. Each valve consists of a 12V solenoid and a
normally closed port. When energized, the solenoid
opens the valve and allows the LPG/NG vapor to flow
through the system.
The valves are open during the engine cranking and
run cycles. Voltage to the valves is controlled by the
ECM.
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