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Device for measurement of gas mass flow. Einrichtung zur Gasmassenstrommessung

Abstract

The invention is concerned with a device for the measurement of gas mass flow, particularly measuring air mass flow for vehicles with internal combustion engines, with a measurement bridge, in one branch of which a gas flow resistance, particularly a hot film sensor, with gas flowing round it, is connected in series with a measurement resistance and in another branch of which a compensation resistance measuring the gas temperature is connected in series with a fixed resistor, where the bridge differential voltage is measured in the zero branch of the measuring bridge and a control parameter is produced from this, in order to control a transistor valve situated in the bridge supply path of a DC voltage source via its control electrode until the bridge is balanced, and where the voltage at the measurement resistance after the bridge is balanced is used as a measure of the gas mass flow. In order to obtain exact results of measurement in spite of relatively high interference noise from the cables, it is proposed that an increased supply DC voltage appreciably decreasing the occurring interference noise from the cables should be produced from a small DC voltage and that the output of the  More>>
Authors:
Publication Date:
Sep 28, 1989
Product Type:
Patent
Report Number:
DE 3809110; A1
Reference Number:
DE-93-007764; EDB-93-091617
Resource Relation:
Patent File Date: 18 Mar 1988
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; FLOWMETERS; INTAKE STRUCTURES; CONTROL SYSTEMS; DC TO DC CONVERTERS; MEASURING METHODS; ELECTRICAL EQUIPMENT; ENGINES; EQUIPMENT; HEAT ENGINES; MEASURING INSTRUMENTS; MECHANICAL STRUCTURES; METERS; 330603* - Vehicle Design Factors- Engine System
OSTI ID:
6346905
Country of Origin:
Germany
Language:
German
Availability:
Available from Deutsches Patentamt, Muenchen (Germany).
Submitting Site:
DE
Size:
Pages: (7 p)
Announcement Date:

Citation Formats

Sass, W. Device for measurement of gas mass flow. Einrichtung zur Gasmassenstrommessung. Germany: N. p., 1989. Web.
Sass, W. Device for measurement of gas mass flow. Einrichtung zur Gasmassenstrommessung. Germany.
Sass, W. 1989. "Device for measurement of gas mass flow. Einrichtung zur Gasmassenstrommessung." Germany.
@misc{etde_6346905,
title = {Device for measurement of gas mass flow. Einrichtung zur Gasmassenstrommessung}
author = {Sass, W}
abstractNote = {The invention is concerned with a device for the measurement of gas mass flow, particularly measuring air mass flow for vehicles with internal combustion engines, with a measurement bridge, in one branch of which a gas flow resistance, particularly a hot film sensor, with gas flowing round it, is connected in series with a measurement resistance and in another branch of which a compensation resistance measuring the gas temperature is connected in series with a fixed resistor, where the bridge differential voltage is measured in the zero branch of the measuring bridge and a control parameter is produced from this, in order to control a transistor valve situated in the bridge supply path of a DC voltage source via its control electrode until the bridge is balanced, and where the voltage at the measurement resistance after the bridge is balanced is used as a measure of the gas mass flow. In order to obtain exact results of measurement in spite of relatively high interference noise from the cables, it is proposed that an increased supply DC voltage appreciably decreasing the occurring interference noise from the cables should be produced from a small DC voltage and that the output of the DC/DC voltage converter should be connected to the control electrode of the transistor valve, so that the control parameter for the control electrode is derived from the raised DC supply voltage through reducers depending on the gas flow.}
place = {Germany}
year = {1989}
month = {Sep}
}