C6.6 Generator Sets Caterpillar

Product Description

Usage:

C6.6 LC6

C6.6 Generator Set Engine

The Cat C6.6 Generator Set Engine has the following characteristics.

In-line six cylinder
Four stroke cycle
Turbocharged aftercooled

Engine Specifications

Note: The front end of the engine is opposite the flywheel end of the engine. The left and the right sides of the engine are determined from the flywheel end. The number 1 cylinder is the front cylinder.

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Illustration 1	g01127295
Cylinder and valve location (A) Exhaust valves (B) Inlet valves

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Table 1
C6.6 Engine Specifications
Operating Range (rpm)	900 to 2800 ⁽¹⁾
Number of Cylinders	6 In-Line
Bore	105 mm (4.13 inch)
Stroke	127 mm (5.0 inch)
Aspiration	Turbocharged aftercooled
Compression Ratio	16.2:1
Displacement	6.6 L (403 in³)
Firing Order	1-5-3-6-2-4
Rotation (flywheel end)	Counterclockwise

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The operating rpm is dependent on the engine rating, the application, and the configuration of the throttle.

Electronic Engine Features

The engine operating conditions are monitored. The Electronic Control Module (ECM) controls the response of the engine to these conditions and to the demands of the operator. These conditions and operator demands determine the precise control of fuel injection by the ECM. The electronic engine control system provides the following features:

Engine monitoring
Engine speed governing
Control of the injection pressure
Cold start strategy
Automatic air/fuel ratio control
Torque rise shaping
Injection timing control
System diagnostics

For more information on electronic engine features, refer to the Operation and Maintenance Manual, "Features and Controls" topic (Operation Section).

Engine Diagnostics

The engine has built-in diagnostics in order to ensure that the engine systems are functioning correctly. The operator will be alerted to the condition by a "Stop or Warning" lamp. Under certain conditions, the engine horsepower and the vehicle speed may be limited. The electronic service tool may be used to display the diagnostic codes.

There are three types of diagnostic codes: active, logged and event.

Most of the diagnostic codes are logged and stored in the ECM. For additional information, refer to the Troubleshooting Manual, "Diagnostic Code Cross Reference" topic.

The ECM provides an electronic governor that controls the injector output in order to maintain the desired engine rpm.

Engine Cooling and Lubrication

The cooling system consists of the following components:

Gear-driven centrifugal water pump
Water temperature regulator which regulates the engine coolant temperature
Gear-driven rotor type oil pump
Oil cooler

The engine lubricating oil is supplied by a rotor type oil pump. The engine lubricating oil is cooled and the engine lubricating oil is filtered. The bypass valve can provide unrestricted flow of lubrication oil to the engine if the oil filter element should become plugged.

Engine efficiency, efficiency of emission controls, and engine performance depend on adherence to proper operation and maintenance recommendations. Engine performance and efficiency also depend on the use of recommended fuels, lubrication oils, and coolants. Refer to this Operation and Maintenance Manual, "Maintenance Interval Schedule" for more information on maintenance items.