Software Multec 3.5 Fuel Injector Application Manual
5-4
Delphi Energy and Chassis Systems
Revision: 11/05-1
Figure 5-1 - Injector Firing Schemes (red bar = injection event)
5.2.2 Open Loop Injector and Fuel Rail Characterization
For ease of calculation and calibration, the engine controller’s software
assumes the injector is a linear device. As a linear device, the injector can
be characterized by the slope in the traditional Y = M*X + B equation of a
line.
In most fuel systems, fuel flow rate varies linearly and proportionally with
injector on-time. Y = M*X + B can be used to effectively model “fuel
flow” vs. “on-time.”
Y = Fuel flow (grams/sec)
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