The CG137 Engines are standard engines with low-pressure gas fuel systems. These engines are used for industrial applications and generator set applications. The engines will successfully operate on commercial pipeline natural gas and wellhead gas (field gas).
For the low-pressure gas fuel system, the carburetor is located after the air cleaner. Filtered air and gas are mixed in the carburetor. The mixture is compressed by the turbocharger (if equipped). The fuel system operates with a gas pressure between
The engine is equipped with electronic ignition which is controlled by the electronic control module (ECM) and with conventional spark plugs. The system provides dependable firing and low maintenance. The system provides precise control of the duration of the spark and the ignition timing.
The system also provides diagnostic capability that enhances troubleshooting. Primarily, the ignition wiring is routed externally. A short stretch of wire is routed under the valve covers.
The engine lubrication oil is circulated by a gear-driven pump. The oil is cooled and filtered. A bypass valve provides unrestricted flow of lubrication oil to the engine parts if the engine oil filter elements become plugged.
The standard cooling system has a gear-driven pump. The cooling system has two temperature regulators that regulate the outlet temperature of the coolant. The temperature depends on the application. Jacket water coolant temperature is limited from
For engines with a Separate Circuit Aftercooler (SCAC), the air is cooled by a heat exchanger. The water that cools the air in the heat exchanger is in a circuit that is separate from the jacket water. The aftercooler coolant is pumped by an auxiliary water pump. The SCAC is required to operate at one of the following temperatures. The engine rating depends on the temperature and the application.
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54 °C (130 °F)
| CG137 Engine Specifications | ||
| Item | CG137-12 Engine | |
| Rated speed (rpm) | 1800 | |
| Cylinders and arrangement | 65 degree V-12 | |
| Bore | |
|
| Stroke | |
|
| Compression Ratio | 8.5:1 | |
| Aspiration | Turbocharged Aftercooled (TA) (1) | |
| Total displacement | |
|
| Firing order | 1-4-9-8-5-2-11-10-3-6-7-12 | |
| Rotation (flywheel end) | Counterclockwise | |
| (1) | Separate Circuit Aftercooling (SCAC) |
| |
| Illustration 1 | g02728065 |
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CG137-12 Engine design (A) Inlet valves (B) Exhaust valves (C) Flywheel | |
Engine efficiency and maximum utilization of engine performance depend on adherence to proper operation and maintenance recommendations. These recommendations include the use of recommended lubricants, fuels, and coolants.
For the engine maintenance that is required, Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule".