Delphi Multec 3.5 - Page 76

Product Description Multec 3.5 Fuel Injector Application Manual
3-32 Delphi Energy and Chassis Systems
Revision: 11/05-1
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0.5
1.0
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0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Single Or Mean Flow Curve
Single Or Mean Regression Line
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Linear Range
Pulse Width (ms)
Flow Rate (g/s)
% Flow Deviation From Regression
Figure 3-17 - Linear Range
Note
The 5% limit for linear flow range is an SAE J1832 standard to allow
comparison of injector data. Using values other than 5% may be more
appropriate depending on the fueling accuracy needs of the engine
control system.
Linear range can apply to a single injector or an average of a population of
injectors (this must be specified when reporting the linear range value.) A
high linear range is desirable for the following reasons:
• Allows accurate fueling at lower idle and higher peak engine speeds.
• Better low pulse-width performance combined with higher maximum
flow. (Important for high specific output engines and turbocharged or
supercharged engines).
• Aids in engine controller calibration accuracy.
• Can allow for one injector model to be used for multiple engine
applications.