Patent · US Expired

Device for measuring the mass of a flowing medium

US5712425A · kind A · utility

18Cited by

7References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hans Hecht · Stuttgart, DE
Heinz Rilling · Eberdingen, DE
Stefan Lehenberger · Weitnau, DE
Uwe Konzelmann · Asperg, DE

Key dates

Filing date	Aug 26, 1996
Grant date	Jan 27, 1998
Priority date	—
Expiry date	Aug 26, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01F1/6842
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device for measuring the mass of a flowing medium by use of a temperature-dependent measuring resistor bathed by the flowing medium and accommodated in a measuring channel. The device has a flow obstacle, embodied in the form of a trip edge, upstream of the measuring element in the region of an inlet opening of the measuring channel, so as to create a chronologically and spatially stable separation zone in the region of the trip edge, thereby preventing chronologically and spatially unstable separation zones and makes it possible to attain a reduction in measuring signal noise. The invention is contemplated for measuring the mass of a flowing medium, especially for measuring the aspirated air mass in internal combustion engines.

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