Patent · US Expired

Method of and device for controlling the burn-off of a measuring resistor

US4579098A · kind A · utility

8Cited by

5References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Bernhard Mattes · Sachsenheim, DE
Egbert Perenthaler · Stuttgart, DE
Gunther Plapp · Echterdingen, DE

Key dates

Filing date	Mar 19, 1985
Grant date	Apr 1, 1986
Priority date	—
Expiry date	Mar 19, 2005

Classification

Technology area (CPC G)Physics
CPC primaryG01F1/6983
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Disclosed is a method of and a device for controlling a burn-off function of a measuring resistor, particularly heated wire or heated film in an air flow sensor of an internal combustion engine. The burn-off operation for fast cleaning the measuring resistor is normally made either periodically or in response to preset operational conditions of the engine. The invention interrupts this burn-off function when detrimental operational condition of the engine depending on the rotary speed has occurred. The stoppage of the burn-off function preferably occurs after a simultaneous detection of a predetermined temperature value detected by a sensor.

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