Testing and calibration device for an oxygen probe evaluation circuit and method of use of the device
First Claim
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1. A testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, said device comprising:
- a probe equivalent circuit electrically coupled to the evaluation circuit in the same manner as the oxygen probe is coupled to the evaluation circuit, said probe equivalent circuit configured to emulate the oxygen probe and to simulate probe faults, wherein the probe equivalent circuit is in electical communication with the evaluation circuit instead of the oxygen probe, or in parallel with it, during testing calibration.
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Abstract
A testing and calibrating device for an evaluation circuit of a linear oxygen probe (S) of an internal combustion engine is disclosed. Said device comprises a probe equivalent circuit (SES) having the same terminals (Vs+, Vs−/Vp−, Vp+ and Rc) as the oxygen probe (S). The probe equivalent circuit can largely emulate the electrical and chemical behaviors of the oxygen probe (S) and simulate probe faults and, at least during a testing and calibrating process, is connected to the evaluation circuit in place of the oxygen probe (S) or is connected parallel to said oxygen probe.
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Citations
14 Claims
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1. A testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, said device comprising:
a probe equivalent circuit electrically coupled to the evaluation circuit in the same manner as the oxygen probe is coupled to the evaluation circuit, said probe equivalent circuit configured to emulate the oxygen probe and to simulate probe faults, wherein the probe equivalent circuit is in electical communication with the evaluation circuit instead of the oxygen probe, or in parallel with it, during testing calibration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for operating a testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, said method comprising the steps of:
coupling a probe equivalent circuit to the evaluation circuit in the same manner as the oxygen probe is coupled to the evaluation circuit, said probe equivalent circuit configured to emulate, the oxygen probe and to simulate probe faults, wherein said probe equivalent circuit is in electrical communication with the evaluation circuit instead of the oxygen probe during testing and/or calibration. - View Dependent Claims (9, 10, 11)
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12. A method for operating a testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, said method comprising the steps of:
coupling a probe equivalent circuit to the evaluation circuit in the same manner as the oxygen probe is coupled to the evaluation circuit, said probe equivalent circuit configured to emulate the oxygen probe and to simulate probe faults, wherein the probe equivalent circuit is in electrical communication with the evaluation circuit instead of the oxygen probe and is coupled in parallel with the oxygen probe, during testing and/or calibration. - View Dependent Claims (13, 14)
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