Patent · US Active

Fault simulator for checking the diagnosis implemented in a control device for a lambda sensor in an internal combustion engine

US9880127B2 · kind B2 · utility

1Cited by

9References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Bernhard Ledermann · Weil der Stadt, DE
Claudius Bevot · Stuttgart, DE
Thomas Steinert · Waiblingen, DE

Key dates

Filing date	Jul 9, 2013
Grant date	Jan 30, 2018
Priority date	—
Expiry date	Dec 8, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/007
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for checking fault detection of a control device of an internal combustion engine for malfunction of a connected broadband lambda probe, including checking with a fault simulator between the lambda probe and the control device; to simulate faults of the broadband lambda probe, the fault simulator modifies electrical signals between the broadband lambda probe and the control device. A Nernst voltage of the lambda probe and a pump current of the control device are delivered to the fault simulator; the fault simulator delivers a pump current to the lambda probe and a Nernst voltage to the control device; to simulate faults of the lambda probe, the fault simulator modifies the Nernst voltage to the control device as to the Nernst voltage outputted from the lambda probe. Also described is a related fault simulator. The method and fault simulator monitor the fault detection of control devices for lambda probes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.