Figure 4-64. Electronic-Timed Injection.

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Figure 4-63. Mechanical-Timed Injection.

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TM-9-8000 Principles of Automotive Vehicles Manual

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Figure 4-65. Continuous Injection.

TM 9-8000

Figure 4-64. Electronic-Timed Injection.

(5) Throttle valve position

4-27. Continuous Fuel Injection (Fig. 4-65).

Continuous fuel Injection systems provide a continuous

(6) Intake manifold airflow.

spray of fuel from each injector at a point in the Intake

port located just before each intake valve. Because the

The computer receives this Information and uses it to

entrance of the fuel into the cylinder is controlled by the

calculate the amount of fuel delivered at each Injection

intake valve, the continuous system will fulfill the

cycle. The computer is capable of changing the rate of

requirements of a gasoline engine. Timed Injection

fuel delivery to the engine hundreds of times a second,

systems, though a necessity on diesel engines, are

making the system extremely accurate. The computer

costlier than continuous systems and are used on

regulates the amount of fuel delivered by varying the

gasoline engines only when more precise fuel metering

duration of Injector operation.

is desired. In the continuious system, fuel is delivered

TA233428

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