Method for operating a heatable exhaust gas probe
AssigneeRobert Bosch GmbH
InventorsClaudius Bevot, Eberhard Schnaibel, Jens Wagner
Life of this patent
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Abstract
A method for operating an exhaust gas probe, in particular a lambda probe, in the exhaust gas of an internal combustion engine, where at least one heating element for achieving the operating temperature in the exhaust gas probe and determination of the temperature of the exhaust gas probe is performed by measuring the internal resistance. Measurement of the internal resistance occurs by the superimposition of discrete bipolar test pulses that include a pulse and a counter pulse, and by acquisition of the Nernst voltage.
Claims12
A method for operating an exhaust gas probe in an exhaust gas of an internal combustion engine, wherein the exhaust gas probe comprises at least one heating element for achieving an operating temperature of the exhaust gas probe and a determination of the temperature occurs by measuring the internal resistance of the exhaust gas probe, the method comprising:
- measuring the internal resistance by superimposing discrete bipolar test pulses comprising a pulse and a counter pulse and by acquiring a Nernst voltage.
A device configured to implement a method for operating an exhaust gas probe in an exhaust gas of an internal combustion engine, wherein the exhaust gas probe comprises at least one heating element for achieving an operating temperature of the exhaust gas probe and a determination of the temperature occurs by measuring the internal resistance of the exhaust gas probe, the method comprising:
- measuring the internal resistance by superimposing discrete bipolar test pulses comprising a pulse and a counter pulse and by acquiring a Nernst voltage.
A computer program that executes all steps of a method, if run in a control unit of an internal combustion engine, for operating an exhaust gas probe in an exhaust gas of an internal combustion engine, wherein the exhaust gas probe comprises at least one heating element for achieving an operating temperature of the exhaust gas probe and a determination of the temperature occurs by measuring the internal resistance of the exhaust gas probe, the method comprising:
- measuring the internal resistance by superimposing discrete bipolar test pulses comprising a pulse and a counter pulse and by acquiring a Nernst voltage.
A computer program product with a program code, that is stored on a machine-readable carrier, for carrying out a method, if executed on a computer or in a control unit, for operating an exhaust gas probe in an exhaust gas of an internal combustion engine, wherein the exhaust gas probe comprises at least one heating element for achieving an operating temperature of the exhaust gas probe and a determination of the temperature occurs by measuring the internal resistance of the exhaust gas probe, the method comprising:
- measuring the internal resistance by superimposing discrete bipolar test pulses comprising a pulse and a counter pulse and by acquiring a Nernst voltage.
Dependencies are inferred from the claim text.