Mixture adaptation method
AssigneeRobert Bosch GmbH
InventorsJens Wagner, Peter Kaltenbrunn
Life of this patent
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Abstract
A method for compensating for mismatches of the precontrol of a fuel metering for an internal combustion engine. A regulation being superimposed on the precontrol. At least one correction quantity being formed, from the behavior of the regulation at high temperatures of the internal combustion engine, which influences the fuel metering even at low temperatures of the internal combustion engine in a supplementing manner to the superimposed regulation for compensating for the mismatches. At low temperatures a further correction quantity is formed which acts upon the fuel metering, whose effect at low temperatures of the internal combustion engine is greater than at high temperatures.
Claims12
A method for compensating for mismatches of a precontrol of a fuel metering for an internal combustion engine, the method comprising:
- superimposing a regulation on the precontrol;
- adapting at least one first correction quantity based on a behavior of the regulation at high temperatures of the internal combustion engine;
- influencing the fuel metering via the at least one first correction quantity even at low temperatures of the internal combustion engine in a supplementary manner to the superimposed regulation for compensating for mismatches;
- and
- providing a temperature-dependent adaptation of a further correction quantity which acts upon the fuel metering, an effect of the further correction quantity at low temperatures of the internal combustion engine being greater than at high temperatures.
An electronic control unit of an internal combustion engine which performs a method for compensating for mismatches of a precontrol of a fuel metering for an internal combustion engine including:
- a superimposing arrangement to superimpose a regulation on the precontrol;
- an adapting arrangement to adapt at least one first correction quantity on a basis of a behavior of the regulation at high temperatures of the internal combustion engine;
- an influencing arrangement to influence the fuel metering via the at least one first correction quantity even at low temperatures of the internal combustion engine in a supplementary manner to the superimposed regulation for compensating for mismatches;
- and
- an arrangement to provide a temperature-dependent adaptation of a further correction quantity which acts upon the fuel metering, an effect of the further correction quantity at low temperatures of the internal combustion engine being greater than at high temperatures.
Dependencies are inferred from the claim text.