Fuel control
AssigneeHusqvarna AB
InventorJohan Ikonen
Life of this patent
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Abstract
A method in a combustion engine 100 for determining a desired fuel setting λ+. The method comprises configuring a fuel setting λ, determining a combustion engine parameter β in dependence of the configured fuel setting λ, wherein the combustion engine parameter is related to the fuel setting by a convex function relationship, and updating the fuel setting λ towards the desired fuel setting λ+, based on the determined combustion engine parameter β and on the convex function relationship between the fuel setting λ and the combustion engine parameter β.
Claims20
A method in a combustion engine for determining a desired fuel setting, the method comprising;
- configuring a fuel setting;
- determining a combustion engine parameter in dependence of the configured fuel setting, wherein the combustion engine parameter is associated with an ignition timing value of the combustion engine;
- and
- updating the fuel setting towards the desired fuel setting, based on the determined combustion engine parameter and on a convex function relationship between the fuel setting and the combustion engine parameter.
A control unit for a combustion engine, wherein the combustion engine is arranged to output an ignition timing value on an output port and to receive a fuel setting on an input port, the control unit comprising processing circuitry and an interface module, wherein the processing circuitry is arranged to:
- configure the fuel setting and to output the fuel setting to the input port;
- determine a combustion engine parameter in dependence of the configured fuel setting, wherein the combustion engine parameter is associated with the ignition timing value of the combustion engine;
- and
- update the fuel setting towards a desired fuel setting, based on the determined combustion engine parameter and on a convex function relationship between the fuel setting and the combustion engine parameter.
Dependencies are inferred from the claim text.