Patent · US Expired

Fail-safe brake system

US6244675A · kind A · utility

12Cited by

2References

14Claims

0Family size

Assignee

Continental AG · DE

Inventors

Holger Behrends · Hannover, DE
Christof Maron · Kelkheim, DE
Thomas Dieckmann · Pattensen, DE

Key dates

Filing date	Sep 8, 1999
Grant date	Jun 12, 2001
Priority date	—
Expiry date	Sep 8, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/2829
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A fail-safe system 2, in which the position of an actuating device 4 is measured by three sensors 8, 10 and 12 that operate independently of one another. The sensor 8 is directly supplied with energy by a first energy source 20, and the sensor 12 is directly supplied with energy by the second energy source 22 of the system 2. The sensor 10 is supplied with energy by the first energy source 20 or by the second energy source 22 via a diode circuit 14, 16 such that, if one of the energy sources 20 or 22 fails, two of the three sensors 8, 10 and 12 are still supplied with energy. A majority decision can be carried out in the microprocessors 32 or 34 if the signal of one sensor is lacking, wherein it can also be determined which of the energy sources 20 or 22 has failed.

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