Method and apparatus for monitoring the functioning of a catalytic converter
First Claim
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1. A method for monitoring a functioning of a catalytic converter of a self-ignition internal combustion engine, the method comprising the steps of:
- providing a sensor for generating an output signal indicating a proportion of hydrocarbons in an exhaust gas of the internal combustion engine; and
recognizing a defect in the catalytic converter as a function of the output signal of the sensor and at least one variable predetermined as a function of at least one operating characteristic of the internal combustion engine.
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Abstract
A method and an apparatus are described for monitoring the functioning of a catalytic converter, particularly an oxidation catalytic converter and/or a reduction catalytic converter of a self-ignition internal combustion engine. A sensor is provided which generates an output signal that indicates the proportion of hydrocarbons in the exhaust gas. A defect of the catalytic converter is recognized as a function of the output signal of the sensor.
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10 Claims
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1. A method for monitoring a functioning of a catalytic converter of a self-ignition internal combustion engine, the method comprising the steps of:
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providing a sensor for generating an output signal indicating a proportion of hydrocarbons in an exhaust gas of the internal combustion engine; and recognizing a defect in the catalytic converter as a function of the output signal of the sensor and at least one variable predetermined as a function of at least one operating characteristic of the internal combustion engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for monitoring a functioning of a catalytic converter of an internal combustion engine, the apparatus comprising:
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a sensor for generating an output signal that indicates a proportion of hydrocarbons in an exhaust gas of the internal combustion engine; and an arrangement for recognizing a defect of the catalytic converter as a function of the output signal of the sensor and at least one variable predetermined as a function of at least one operating characteristic of the internal combustion engine.
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Specification