F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 45/00 (2006.01) F02D 41/38 (2006.01) F02D 41/40 (2006.01) F02M 51/06 (2006.01) F02M 57/02 (2006.01)
Patent
CA 2350269
A fuel injection control system and method for delivering multiple fuel injections to a cylinder of an engine during a fuel injection event based upon engine operating conditions, the control system including an electronic controller coupled to an electronically controlled fuel injector, and a plurality of sensors coupled to the controller for inputting certain signals representative of certain engine operating conditions, the controller being operable to output a fuel injection signal to the fuel injector to deliver multiple fuel shots to the cylinder during a fuel injection event based upon the sensor signals. The controller also determines when an active fuel injection waveform should transition to another waveform based on fuel and engine speed changes. The controller sets single check fuel and engine speed hysteresis values, and determines fuel and engine speed changes. If both the fuel and engine speed changes are greater than the respective hysteresis values, the active waveform is changed to a potential waveform, which is found in a lookup table or map. The waveform will also change if the fuel change is continuously greater than a loop fuel hysteresis value, which value is larger than the single check fuel hysteresis value, for longer than a selected period of time such as approximately 3.8 seconds.
Caterpillar Inc.
Kirby Eades Gale Baker
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