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CHAPTER 9

DIESEL FUEL SYSTEMS AND ENGINE CONTROL DEVICES

In the first part of this chapter, we will discuss the common types of fuels and the hardware systems that store, clean, transfer, and finally in-ject the fuel into the engine for burning. In the second section, we will describe how the injection of fuel is controlled to maintain the engine at a set speed.

After studying the information in this chapter, you should be able to identify the characteristics of engine fuels in terms of properties, combustion, volatility, and turbulence. You should also be able to identify diesel engine fuel systems in terms of external fuel systems and fuel injection systems. You should be able to describe the jerk-type, distributor-type, and unit fuel injector systems in terms of design and function of components and methods of operation. Additionally, you should understand how the operating speed of a diesel engine is controlled. Finally, you should be able to identify methods you can use to purge air from the fuel system of a diesel engine.







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