Testing and calibrating device for an evaluation circuit for a linear oxygen probe (lambda probe)
AssigneeSiemens Aktiengesellschaft
InventorsDariusch Akhavan, Stephan Bolz
Life of this patent
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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.
Claims20
A testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, comprising:
- a probe equivalent circuit having the same connections as the oxygen probe, which largely emulates the electrical and chemical behaviour of the oxygen probe and can simulate probe faults, and which is connected to the evaluation circuit instead of the oxygen probe, or in parallel with it, at least during a testing and calibrating process.
A method for operating a testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, comprising the steps of:
- coupling a probe equivalent circuit having the same connections as the oxygen probe, which largely emulates the electrical and chemical behaviour of the oxygen probe and can simulate probe faults, with the evaluation circuit instead of the oxygen probe during a testing and calibrating process.
A method for operating a testing and calibrating device for an evaluation circuit for a linear oxygen probe in an internal combustion engine, comprising the steps of:
- coupling a probe equivalent circuit having the same connections as the oxygen probe, which largely emulates the electrical and chemical behaviour of the oxygen probe and can simulate probe faults, with the evaluation circuit instead of the oxygen probe in parallel with the oxygen probe, at least during a testing and calibrating process.
Dependencies are inferred from the claim text.