DE3334622A1 - Test rig for internal combustion engines with a dynamometer - Google Patents

Test rig for internal combustion engines with a dynamometer

Info

Publication number
DE3334622A1
DE3334622A1 DE19833334622 DE3334622A DE3334622A1 DE 3334622 A1 DE3334622 A1 DE 3334622A1 DE 19833334622 DE19833334622 DE 19833334622 DE 3334622 A DE3334622 A DE 3334622A DE 3334622 A1 DE3334622 A1 DE 3334622A1
Authority
DE
Germany
Prior art keywords
fuel consumption
computer unit
internal combustion
signal
test stand
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.)
Granted
Application number
DE19833334622
Other languages
German (de)
Other versions
DE3334622C2 (en
Inventor
Herwig Dipl.-Ing. Dr. 7146 Tamm Richter
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Priority to DE19833334622 priority Critical patent/DE3334622C2/en
Publication of DE3334622A1 publication Critical patent/DE3334622A1/en
Application granted granted Critical
Publication of DE3334622C2 publication Critical patent/DE3334622C2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
    • G01M15/044—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
    • G01F9/008—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine where the other variable is the flight or running time

Abstract

This test rig comprises a computer unit which calculates the work performed by the internal combustion engine over a measuring period from a braking torque signal and an angle signal. From this work performed and the fuel required by the internal combustion engine for this the specific fuel consumption of an engine to be tested is precisely calculated.

Description

Prüfstand für Brennkraftmaschinen Test bench for internal combustion engines

mit einem Dynamometer Die Erfindung betrifft einen Prüfstand für Brennkraftmaschinen mit einem Dynamometer. with a dynamometer The invention relates to a test stand for Internal combustion engines with a dynamometer.

Bei Entwicklungsarbeiten an Verbrennungsmotoren hat sich gezeigt, daß die Ermittlung des spezifischen Verbrauchs mit Streuungen behaftet ist, die um so größer werden, je niedriger die Motorbelastung bzw. Drehzahl des untersuchten Betriebspunktes ist. Die Ursachen dafür liegen in Streuungen der Verbrauchsmessung sowie in unzureichend genauer Erfassung der Last bzw. Drehzahl, sowie in Schwankungen dieser Größen während der Meßzeit.Development work on internal combustion engines has shown that that the determination of the specific consumption is subject to scatter, the the greater the lower the engine load or speed of the examined Operating point is. The reasons for this are scattered in the consumption measurement as well as insufficiently accurate detection of the load or speed, as well as fluctuations of these quantities during the measurement period.

Aufgabe der Erfindung ist es, einen Prüfstand für eine Brennkraftmaschine zu schaffen, mit dem der spezifische Kraftstoffverbrauch exakt ermittelt und angezeigt wird.The object of the invention is to provide a test stand for an internal combustion engine with which the specific fuel consumption is precisely determined and displayed will.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere, die Erfindung ausgestaltende Merkmale sind in den Unteransprüchen enthalten.According to the invention, this object is achieved by the characterizing features of claim 1 solved. Further features defining the invention are shown in Contain subclaims.

Die mit der Erfindung hauptsächlich erzielten Vorteile sind darin zu sehen, daß mit den in der Rechnereinheit des Prüfstands verarbeiteten Werten der spezifische Verbrauch der Brennkraftmaschine mit einfachen Mitteln exakt erfaßt und angezeigt wird.The main advantages achieved by the invention are therein to see that with the values processed in the computer unit of the test bench the specific consumption of the internal combustion engine is recorded exactly with simple means and is displayed.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Schemadarstellung gezeigt und nachstehend näher beschrieben.An embodiment of the invention is based on a schematic representation shown and described in more detail below.

Darin sind die zu messenden Größen mit durchgezogenen Linien dargestellt, Signale und Daten mit unterbrochenen Linien und Steurgröcn mit strichpunkticrten Linien.The quantities to be measured are shown with solid lines, Signals and data with broken lines and control variables with dash-dotted lines Lines.

Die Schemadarstellung zeigt einen Prüfstand 1 mit einer Brennkraftmaschine 2. An einer nicht gezeigten Abtriebswelle der Brennkraftmaschine 2 ist ein Dynamometer 3 angebracht, das ein Bremsmomentsignal Md abgibt. Ferner ist an der Abtriebswelle ein Winkelgeber 4 vorgesehen, der den von der Abtriebswelle umfahrenen Winkel ermittelt und ein Winkelsignal A ç erzeugt.The diagram shows a test stand 1 with an internal combustion engine 2. There is a dynamometer on an output shaft (not shown) of the internal combustion engine 2 3 attached, which emits a braking torque signal Md. It is also on the output shaft an angle encoder 4 is provided which determines the angle traversed by the output shaft and generates an angle signal A ç.

Das Bremsmomentsignal Md und das Winkelsignal P werden einer Rechnereinheit 5 zugeführt. An die Rechnereinheit 5 ist ferner ein Kraftstoffverbrauchsmeßgerät 6 angeschlossen, das den Kraftstoffverbrauch der Brennkraftmaschine 2 erfaßt und ihr ein Kraftstoffverbrauchssignal mk bereitstellt.The braking torque signal Md and the angle signal P are a computer unit 5 supplied. A fuel consumption meter is also attached to the computer unit 5 6 connected, which detects the fuel consumption of the internal combustion engine 2 and provides her with a fuel consumption signal mk.

Eine Zeitgebereinheit 7 gibt ein Synchronsignal ts an die Rechnereinheit 5 und das Kraftstoffverbrauchsmeßgerät 6 zur Bestimmung einer Meßzeit ab.A timer unit 7 sends a synchronization signal ts to the computer unit 5 and the fuel consumption meter 6 to determine a measuring time.

Die Rechnereinheit 5 berechnet aus dem Bremsmomentsignal Md und dem Winkelsignal t tp durch Integration die von der Brennkraftmaschine während der Meßzeit geleistete Arbeit A und daraus, zusammen mit dem Kraftstoffverbrauchssignal mk, den spezifischen Kraftstoffverbrauch b . Die geleistete Arbeit A e und der spezifische Kraftstoffverbrauch be werden von einer Anzeigeeinheit 8 dargestellt.The computer unit 5 calculates from the braking torque signal Md and the Angle signal t tp by integrating that from the internal combustion engine during the measurement time work done A and from it, together with the fuel consumption signal mk, the specific fuel consumption b. The work done A e and the specific Fuel consumption are shown by a display unit 8.

In weiterer Ausgestaltung der Erfindung werden von der Rechnereinheit 5 noch die Werte mittleres Moment Md, mittlere Drehzahl n, mittlere Leistung P und Kraftstoffverbrauch V ermite telt und auf der Anzeigeeinheit 8 angezeigt.In a further embodiment of the invention, the computer unit 5 also the values mean torque Md, mean speed n, mean power P and Fuel consumption V ermite telt and shown on the display unit 8.

Es ist ferner sinnvoll, die oben erwähnten Werte mittels eines an die Rechnereinheit 5 angeschlossenen Druckers 9 zu dokumentieren.It is also useful to indicate the values mentioned above by means of an to document the computer unit 5 connected printer 9.

Die Zeitgebereinheit 7 ist im Ausführungsbeispiel unabhängig von der Rechnereinheit 5 und dem Kraftstoffverbrauchsmeßc3erät 6 dargestellt; sie kann aber auch in eines dieser Geräte integriert sein.In the exemplary embodiment, the timer unit 7 is independent of the Computer unit 5 and the fuel consumption measuring device 6 shown; but she can also be integrated into one of these devices.

- L e e r s e i t e -- L e r s e i t e -

Claims (5)

Patentansprüche 1. Prüfstand für Brennkraftmaschinen mit einem Dynamometer, dadurch gekennzeichnet, daß von einer Abtriebswelle der Brennkraftmaschine über das Dynamometer ein Bremsmomentsignal (Md), und über einen Winkelgeber ein Winkelsignal (t ) abgenommen und einer Rechnereinheit zugeführt wird, und daß die Rechnereinheit von einem Kraftstoffverbrauchsmeßgerät ein Kraftstoffverbrauchssignal (mk) ) erhält, wobei die Rechnereinheit und das Kraftstoffverbrauchsmeßgerät über eine, ein Synchronsignal (t5) erzeugende Zeitgebereinheit angesteuert wird, und daß die Rechnereinheit einerseits aus dem Bremsmomentsignal (Md) und dem Winkelsignal (act), die von der Brennkraftmaschine im Meßzeitraum geleistete Arbeit (A) und andererseits aus dieser geleisteten Arbeit (A) und dem Kraftstoffverbrauchssignal (mm), den spezifischen Kraftstoffverbrauch (be) im Meßzeitraum berechnet und anzeigt. Claims 1. Test stand for internal combustion engines with a dynamometer, characterized in that from an output shaft of the internal combustion engine the dynamometer a braking torque signal (Md), and an angle signal via an angle encoder (t) is removed and fed to a computer unit, and that the computer unit receives a fuel consumption signal (mk)) from a fuel consumption meter, wherein the computer unit and the fuel consumption meter via a, a synchronous signal (t5) generating timer unit is controlled, and that the computer unit on the one hand from the braking torque signal (Md) and the angle signal (act) from the internal combustion engine work done in the measurement period (A) and, on the other hand, from this work done (A) and the fuel consumption signal (mm), the specific fuel consumption (be) calculated and displayed in the measurement period. 2. Prüfstand nach Anspruch 1, dadurch gekennzeichnet, daß über die Rechnereinheit die Werte mittleres Moment (Md), mittlere Drehzahl (n), mittlere Leistung (P ) und Kraftstoffvere brauch (V) im Meßzeitraum ermittelt und angezeigt werden.2. Test stand according to claim 1, characterized in that over the Computer unit the values mean torque (Md), mean speed (n), mean Power (P) and fuel consumption (V) determined and displayed in the measuring period will. 3. Prüfstand nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die von der Rechnereinheit ermittelten Werte geleistete Arbeit (A), spezifischer Kraftstoffverbrauch (be) mittleres Moment (Md), mittlere Drehzahl (n), mittlere Leistung (Pe) und Kraftstoffverbrauch (V) von einer an der Rechnereinheit angeschlossenen Druckereinheit ausgedruckt werden.3. Test stand according to claims 1 and 2, characterized in that that the values determined by the computer unit work done (A), more specific Fuel consumption (be) mean torque (Md), mean speed (n), mean Power (Pe) and fuel consumption (V) from one connected to the computer unit Can be printed out in the printer unit. 4. Prüfstand nach Anspruch 1, dadurch gekennzeichnet, daß die Zeitgebereinheit in das Kraftstoffverbrauchsmeßgerät integriert ist.4. Test stand according to claim 1, characterized in that the timer unit is integrated in the fuel consumption meter. 5. Prüfstand nach Anspruch 1, dadurch gekennzeichnet, daß die Zeitgebereinheit in die Rechnereinheit integriert ist.5. Test stand according to claim 1, characterized in that the timer unit is integrated into the computer unit.
DE19833334622 1983-09-24 1983-09-24 Test bench for internal combustion engines with a dynamometer Expired DE3334622C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833334622 DE3334622C2 (en) 1983-09-24 1983-09-24 Test bench for internal combustion engines with a dynamometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833334622 DE3334622C2 (en) 1983-09-24 1983-09-24 Test bench for internal combustion engines with a dynamometer

Publications (2)

Publication Number Publication Date
DE3334622A1 true DE3334622A1 (en) 1985-04-11
DE3334622C2 DE3334622C2 (en) 1985-07-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833334622 Expired DE3334622C2 (en) 1983-09-24 1983-09-24 Test bench for internal combustion engines with a dynamometer

Country Status (1)

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DE (1) DE3334622C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125589A1 (en) * 1991-08-02 1993-02-04 Werner Prof Dr I Schiroslawski Measuring specific fuel consumption and torque of motor vehicle IC engine - setting engine speed at full throttle by braking then idling while measuring average consumption and crankshaft acceleration
EP1411328A2 (en) * 2002-10-15 2004-04-21 Electrolux Home Products, Inc. Method and arrangement for achieving an adjusted engine setting utilizing engine output and/or fuel consumption
CN101893467A (en) * 2010-07-28 2010-11-24 康明斯东亚研发有限公司 Method for measuring fuel consumption of medium and heavy vehicles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NICHTS-ERMITTELT *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125589A1 (en) * 1991-08-02 1993-02-04 Werner Prof Dr I Schiroslawski Measuring specific fuel consumption and torque of motor vehicle IC engine - setting engine speed at full throttle by braking then idling while measuring average consumption and crankshaft acceleration
EP1411328A2 (en) * 2002-10-15 2004-04-21 Electrolux Home Products, Inc. Method and arrangement for achieving an adjusted engine setting utilizing engine output and/or fuel consumption
EP1411328A3 (en) * 2002-10-15 2006-03-15 Electrolux Home Products, Inc. Method and arrangement for achieving an adjusted engine setting utilizing engine output and/or fuel consumption
US7353804B2 (en) 2002-10-15 2008-04-08 Husqvarna Outdoor Products Inc. Method and arrangement for achieving an adjusted engine setting utilizing engine output and/or fuel consumption
CN100422538C (en) * 2002-10-15 2008-10-01 伊莱克绰勒克斯家用产品有限公司 Method and device for regulating engine by outlet and/or fuel cosumption
CN101893467A (en) * 2010-07-28 2010-11-24 康明斯东亚研发有限公司 Method for measuring fuel consumption of medium and heavy vehicles

Also Published As

Publication number Publication date
DE3334622C2 (en) 1985-07-11

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