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OPERATION
TP-6901 6/14 Operation 13
Section 4 Operation
4.1 INTRODUCTION
The KG2204 is a four-stroke internal combustion
engine 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
Figure4-3
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.
K0404