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US 12,203,425 B2Granted
Method and system for measuring fueling quantity variation during multipulse fuel injection event
AssigneeCummins Inc.
InventorsJalal Syed, Donald J. Benson, David Michael Carey, Sanjay Manglam
Life of this patent
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Abstract
The present invention provides a method for analyzing and optimizing the injection of fluid into an internal combustion engine via a common rail system. Once various injection parameters are determined for a given injection system, these data may be used to model the effect of sequential injection events for the system. A processer can then be used to run the model and to adjust sequential fuel injection events to optimize engine performance and fuel usage.
Claims15
A method for optimizing fluid injection into an engine via a common rail system, comprising:
- determining, by a processing unit, a fueling interaction quantity indicating an amount of fueling interaction between a pilot pulse and a main pulse of a multipulse fuel injection event;
- determining, by the processing unit, an adjustment to be made to the pilot pulse or the main pulse using a fueling interaction model involving the multipulse fuel injection event based on the amount of fueling interaction, the determining including (a) in response to a target main injection pulse quantity exceeding the fueling interaction quantity, subtracting the fueling interaction quantity from the target main injection pulse quantity to determine a first adjusted fuel quantity as the adjustment and (b) in response to the target main injection pulse quantity not exceeding the fueling interaction quantity subtracting the target main injection pulse quantity from the fueling interaction quantity and adding an adjustment term to determine a second adjusted fuel quantity differing from the first adjusted fuel quantity as the adjustment;
- and
- performing, by the processing unit, the determined adjustment on the pilot pulse or the main pulse.
1 more element
An engine fuel system comprising:
- a rail;
- a plurality of fuel injectors fluidly coupled to the rail, the fuel injectors configured to inject fuel therefrom;
- a control system comprising at least one sensor and a processing unit operatively coupled to the plurality of fuel injectors, the at least one sensor configured to measure an amount of fueling interaction between a pilot pulse and a main pulse during a multipulse fuel injection event, the processing unit configured to:
- determine a fueling interaction quantity indicating the amount of fueling interaction between the pilot pulse and the main pulse of the multipulse fuel injection event;
- determine an adjustment to be made to the pilot pulse or the main pulse using a fueling interaction model involving the multipulse fuel injection event based on the measured amount of fueling interaction, wherein to determine the adjustment, the processing unit one of (a) in response to a target main injection pulse quantity exceeding the fueling interaction quantity, subtracts the fueling interaction quantity from the target main injection pulse quantity to determine a first adjusted fuel quantity as the adjustment and (b) in response to the target main injection pulse quantity not exceeding the fueling interaction quantity subtracts the target main injection pulse quantity from the fueling interaction quantity and adds an adjustment term to determine a second adjusted fuel quantity differing from the first adjusted fuel quantity as the adjustment;
- and
- perform the determined adjustment on the pilot pulse or the main pulse.
4 more elements
Dependencies are inferred from the claim text.