Delphi Multec 3.5 Applications Manual page 76

Product Description
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
1 0 .0
5 .0
0 .0
-5 .0
-1 0 .0
Note
3-32
Single Or Mean Flow Curve
Single Or Mean Regression Line
1.0 2.0 3.0
Figure 3-17 - Linear Range
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.
Multec 3.5 Fuel Injector Application Manual
Linear Range
4.0 5.0 6.0
Pulse Width (ms)
Delphi Energy and Chassis Systems
7.0 8.0 9.0
Revision: 11/05-1
10.0