DE4226379A1 - Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages - Google Patents

Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages

Info

Publication number
DE4226379A1
DE4226379A1 DE4226379A DE4226379A DE4226379A1 DE 4226379 A1 DE4226379 A1 DE 4226379A1 DE 4226379 A DE4226379 A DE 4226379A DE 4226379 A DE4226379 A DE 4226379A DE 4226379 A1 DE4226379 A1 DE 4226379A1
Authority
DE
Germany
Prior art keywords
display instruments
matching
measurement value
sensor connected
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE4226379A
Other languages
German (de)
Inventor
Ralf Krause
Ulrich-Dieter Dr Standt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to DE4226379A priority Critical patent/DE4226379A1/en
Publication of DE4226379A1 publication Critical patent/DE4226379A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/02—Registering or indicating driving, working, idle, or waiting time only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/14—Measuring arrangements giving results other than momentary value of variable, of general application giving a distribution function of a value, i.e. number of times the value comes within specified ranges of amplitude
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity of catalytic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • F01N2900/0421—Methods of control or diagnosing using an increment counter when a predetermined event occurs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

An arrangement for detecting and reproducing a measurement value according to value ranges contains a sensor (1) for the value concerned. The sensor is connected to integrating display instruments (14-19) via discriminator stages (3-5) associated with individual value ranges. The display instruments are in the form of operating hour meters. USE/ADVANTAGE - Esp. for measuring temp. of exhaust gas converter of i.c. engine. The parameter is detected and displayed according to value range at low cost. Can be simply adapted to each measurement requirement.

Description

Die Erfindung betrifft eine Vorrichtung gemäß dem Oberbegriff des Patentanspruchs. Bevorzugter Einsatzfall der Erfindung ist die Wiedergabe der "thermischen Vorgeschichte" von Abgaskonvertern für Kraftfahrzeug-Brennkraftmaschinen. Aus dieser thermischen Vorge­ schichte kann man auf Alterungserscheinungen und durch Überhitzung begründete Beschädigungen des Konverters schließen.The invention relates to a device according to the preamble of Claim. The preferred application of the invention is Reproduction of the "thermal history" of exhaust gas converters for Motor vehicle internal combustion engines. For this thermal Vorge You can layer on signs of aging and overheating close justified damage to the converter.

Bekannt sind gattungsgemäße Vorrichtungen, die mit einem program­ mierbaren Rechner ausgerüstet sind, der es gestattet, über einen Drucker Temperaturbeanspruchungen auch wertebereichsmäßig wieder­ zugeben. Abgesehen von dem relativ hohen Preis einer derartigen Vorrichtung muß diese durch Neuprogrammierung an die jeweilige Aufgabe angepaßt werden.Generic devices are known which are associated with a program mable computer are equipped, which allows a Printer temperature stresses also in terms of values admit. Apart from the relatively high price of one The device must be reprogrammed to the respective device Task to be adjusted.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vor­ richtung zu schaffen, die mit geringem Aufwand die wertebereichs­ mäßige Erfassung und Wiedergabe einer Meßgröße gestattet und mit einfachen Mitteln die Möglichkeit einer Anpassung an die jeweilige Meßaufgabe bietet.The invention has for its object a generic before direction to create the value range with little effort moderate recording and reproduction of a measured variable allowed and with simple means the possibility of adaptation to the respective Offers measurement task.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kenn­ zeichnenden Merkmalen des Patentanspruchs. The inventive solution to this problem consists in the drawing features of the claim.  

Die Erfindung verwendet in vorteilhafter Weise also erprobte Anzei­ geinstrumenten nach Art von Betriebsstundenzählern. Als Diskrimina­ toren können handelsübliche ICs Verwendung finden, und durch Ände­ rung ihrer Referenzspannung können die Wertebereiche an die jewei­ lige Meßaufgabe angepaßt werden.The invention thus advantageously uses tried and tested advertisements instruments by type of operating hours counter. As a discriminator commercially available ICs can be used, and through changes The value ranges can be matched to the respective current measuring task can be adapted.

Eine Programmierung erübrigt sich also, Datenverluste können nicht auftreten. Die Wiedergabe erfolgt an den Anzeigeinstrumenten so­ fort, d. h. ein nachträglicher Druckvorgang erübrigt sich.Programming is unnecessary, data loss cannot occur. The playback takes place on the display instruments like this away, d. H. a subsequent printing process is not necessary.

Ein Ausführungsbeispiel der Erfindung für den Fall der wertebe­ reichsmäßigen Wiedergabe der Temperaturbelastung eines Abgaskonver­ ters wird im folgenden anhand der Zeichnung erläutert.An embodiment of the invention in the case of the values rich reproduction of the temperature load of an exhaust gas converter ters is explained below with reference to the drawing.

An geeigneter Stelle des einen üblichen und daher hier nicht wie­ derzugebenden Aufbau besitzenden Katalysators ist als Sensor das Thermoelement 1 mit dem nachgeschalteten Temperaturerfassungs-IC 2 angeordnet. Dieser steht mit Eingängen der Spannungsdiskriminatoren 3, 4 und 5 in Verbindung, deren Schwellwerte durch den die Wider­ stände 6 enthaltenden Spannungsteiler bestimmt werden. In der ange­ nommenen Wahl der Temperaturwertebereiche ist die Referenzspannung am Punkt 7 mittels des Potentiometers 8 auf 1,5 V eingestellt. Zwecks Erzielung einer genauen Messung erfolgt die Speisung der Diskriminatoren 3, 4 und 5 über einen Stromkreis, der außer dem Einschalter 9 und dem mit einem Zündschloß der Maschine in Ver­ bindung stehenden Relais 10 mit seinen Kontakten 11 und 12 den Spannungsregler 13 bekannten Aufbaus enthält.The thermocouple 1 with the downstream temperature detection IC 2 is arranged as a sensor at a suitable point on the catalyst which is conventional and therefore does not have the structure to be given here. This is connected to inputs of the voltage discriminators 3 , 4 and 5 , the threshold values of which are determined by the resistors 6 containing the resistors 6 . In the accepted selection of the temperature value ranges, the reference voltage at point 7 is set to 1.5 V by means of the potentiometer 8 . In order to achieve an accurate measurement, the discriminators 3 , 4 and 5 are fed via a circuit which, in addition to the switch 9 and the relay 10 connected to an ignition lock of the machine, contains the voltage regulator 13 of known construction with its contacts 11 and 12 .

Je nachdem, in welchen der vorgegebenen Wertebereiche die Tempera­ tur am Ort des Thermoelements 1 jeweils fällt, erfolgt über die Diskriminatoren 3, 4 und 5 die individuelle Ansteuerung eines der Betriebsstundenzähler 14 bis 19. Jeder dieser Betriebsstundenzähler integriert also die Zeitspanne, in denen im Katalysator eine Tempe­ ratur vorliegt, die in den jeweiligen Wertebereich fällt. Demgemäß gibt die Anzeige aller Instrumente 14 bis 19 in jedem Augenblick gleichsam die thermische Vorgeschichte des Katalysators wieder. Depending on the range of values in which the temperature at the location of the thermocouple 1 falls, the discriminators 3 , 4 and 5 are used to individually control one of the operating hours counters 14 to 19 . Each of these operating hours counters thus integrates the time span in which a temperature is present in the catalytic converter that falls within the respective value range. Accordingly, the display of all instruments 14 to 19 reflects the thermal history of the catalytic converter at every moment, as it were.

Die Schwellwerte der Diskriminatoren 3, 4 und 5 können in einfacher Weise durch Verstellung des Potentiometers 8 oder andere Wahl der Widerstände 6 an die jeweilige Meßaufgabe angepaßt werden.The threshold values of the discriminators 3 , 4 and 5 can be adapted to the respective measurement task in a simple manner by adjusting the potentiometer 8 or other choice of the resistors 6 .

An den Schaltungspunkt 20 kann ein weiterer Zähler angeschlossen werden, der bei ordnungsgemäßem Zustand der Vorrichtung die Summe der Anzeigen der Zähler 14 bis 19 wiedergibt. So ist eine einfache Kontrolle möglich.A further counter can be connected to the switching point 20 , which, when the device is in proper condition, reproduces the sum of the displays of the counters 14 to 19 . This makes it easy to check.

Mit der Erfindung ist demgemäß eine gattungsgemäße Vorrichtung ge­ schaffen, die mit zuverlässigen, preisgünstigen Mitteln jederzeit eine zuverlässige Anzeige gewährleistet.With the invention is accordingly a generic device ge create that with reliable, affordable means at any time ensures a reliable display.

Claims (1)

Vorrichtung zur wertebereichsmäßigen Erfassung und Wiedergabe einer Meßgröße, insbesondere der Temperatur eines Abgaskonverters einer Brennkraftmaschine, mit einem Sensor für die Meßgröße, dadurch ge­ kennzeichnet, daß dem Sensor (1) über Diskriminatorstufen (3, 4, 5) den einzelnen Wertebereichen individuell zugeordnete integrierende Anzeigeinstrumente (14 bis 19) nach Art von Betriebsstundenzählern nachgeschaltet sind.Device for the detection and reproduction of a measured variable, in particular the temperature of an exhaust gas converter of an internal combustion engine, with a sensor for the measured variable, characterized in that the sensor ( 1 ) via discriminator stages ( 3 , 4 , 5 ) individually integrating indicating instruments assigned to the individual value ranges ( 14 to 19 ) are connected in the manner of operating hours counters.
DE4226379A 1991-08-19 1992-08-10 Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages Withdrawn DE4226379A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4226379A DE4226379A1 (en) 1991-08-19 1992-08-10 Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127379 1991-08-19
DE4226379A DE4226379A1 (en) 1991-08-19 1992-08-10 Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages

Publications (1)

Publication Number Publication Date
DE4226379A1 true DE4226379A1 (en) 1993-02-25

Family

ID=25906487

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4226379A Withdrawn DE4226379A1 (en) 1991-08-19 1992-08-10 Measurement value reproducer matching to scale range - has sensor connected to integrating display instruments via discriminator stages

Country Status (1)

Country Link
DE (1) DE4226379A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850578C1 (en) * 1998-11-03 2000-03-09 Honeywell Sa Temperature measuring transducer, e.g. for process control; has microprocessor to detect and store operating temperatures provided by temperature sensor and associated operating times

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850578C1 (en) * 1998-11-03 2000-03-09 Honeywell Sa Temperature measuring transducer, e.g. for process control; has microprocessor to detect and store operating temperatures provided by temperature sensor and associated operating times
WO2000026623A1 (en) * 1998-11-03 2000-05-11 Honeywell Sa Temperature measuring transducer

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8139 Disposal/non-payment of the annual fee