Lesson 2/Learning Event 1
LESSON 2
FUNDAMENTALS OF COMPRESSION IGNITION ENGINE FUEL SYSTEMS
TASK
Describe the fundamentals of compression ignition engine fuel systems.
CONDITIONS
Given information about the types, location, operation, and inspection of compression ignition engine fuel
system components.
STANDARDS
Answer 70 percent of the multiple-choice test items covering fundamentals of compression ignition engine
fuel systems.
REFERENCES
TM 9-8000
Learning Event 1:
DESCRIBE THE COMPONENTS, PRINCIPLES, AND OPERATION OF FUEL INJECTION SYSTEMS
INTRODUCTION
The function of an injection system is to meter the fuel accurately, deliver equal amounts of fuel to all
cylinders at a pressure high enough to ensure atomization, and control the start, rate, and duration of
injection. Keep this threefold function in mind, and you will understand the operation of the various
systems.
Diesel engines and some gasoline engines use fuel injection instead of carburetion. There are several types
of fuel injection systems used on Army equipment: multiple-unit injection pump, unit injection, distributor
injection, and pressure-time systems.
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