Fuzzy control of an internal combustion engine
OwnerMichael Feyinventor
Life of this patent
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Abstract
To further reduce pollutant emissions during operation of an internal combustion using an exhaust catalytic converter and in particular to promptly detect and possibly even prevent a departure from the catalytic converter window, a first oxygen filling level in a front area of the exhaust catalytic converter and a second oxygen filling level in a rear area be determined as a function of a signal of a lambda sensor and that the fuel mixture of the internal combustion engine be influenced as a function of the two oxygen filling levels with the aid of a fuzzy controller.
Claims10
A method for controlling operation of an internal combustion engine, an exhaust aftertreatment system being assigned to the internal combustion engine, including at least one exhaust catalytic converter and one lambda sensor situated upstream from the exhaust catalytic converter, the method comprising:
- determining, as a function of a signal of the lambda sensor, a first oxygen filling level in a front area of the exhaust catalytic converter, and a second oxygen filling level in a rear area of the exhaust catalytic converter;
- and
- influencing, with the aid of a fuzzy controller, a fuel mixture of the internal combustion engine as a function of the first oxygen filling level and the second oxygen filling level.
A control unit for regulating the operation of an internal combustion engine, an exhaust aftertreatment system being assigned to the internal combustion engine, including at least one exhaust catalytic converter and one lambda sensor situated upstream from the exhaust catalytic converter, the control unit configured to:
- determine, as a function of a signal of the lambda sensor, a first oxygen filling level in a front area of the exhaust catalytic converter, and a second oxygen filling level in a rear area of the exhaust catalytic converter;
- and
- influence, with the aid of a fuzzy controller, a fuel mixture of the internal combustion engine as a function of the first oxygen filling level and the second oxygen filling level;
- wherein the fuzzy controller is formed in the control unit.
A non-transitory computer-readable storage medium storing a computer program for controlling operation of an internal combustion engine, an exhaust aftertreatment system being assigned to the internal combustion engine, including at least one exhaust catalytic converter and one lambda sensor situated upstream from the exhaust catalytic converter, the computer program, when executed by a control unit, causing the control unit to perform:
- determining, as a function of a signal of the lambda sensor, a first oxygen filling level in a front area of the exhaust catalytic converter, and a second oxygen filling level in a rear area of the exhaust catalytic converter;
- and
- influencing, with the aid of a fuzzy controller, a fuel mixture of the internal combustion engine as a function of the first oxygen filling level and the second oxygen filling level.
Dependencies are inferred from the claim text.