Patent · US Active

Method for error diagnosis of an ambient-pressure sensor and an intake-manifold pressure sensor

US7463960B2 · kind B2 · utility

9Cited by

4References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Christof Thiel · Heilbronn, DE
Andreas Bethmann · Ditzingen, DE
Steffen Ziel · Schwieberdingen, DE

Key dates

Filing date	May 12, 2006
Grant date	Dec 9, 2008
Priority date	—
Expiry date	Aug 24, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method for error diagnosis of an ambient-pressure sensor and an intake-manifold pressure sensor of an internal combustion engine, a defective intake-manifold pressure sensor or a defective ambient-pressure sensor is unambiguously detected by measuring the signals of the ambient-pressure sensor and the intake-manifold pressure sensor with the internal combustion engine stopped, and comparing the ambient pressure represented by the sensor signal of the ambient-pressure sensor to the intake-manifold pressure represented by the sensor signal of the intake-manifold pressure sensor to determine a pressure difference. If the determined pressure difference is greater than a predetermined maximum value, at least one additional sensor signal is measured with the internal combustion engine running, which additional sensor signal is used for identifying the defective sensor.

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