DE3039050A1 - IC engine valve shaft oil leakage measurement system - has suction pump and vibrating membrane for representative conditions - Google Patents

IC engine valve shaft oil leakage measurement system - has suction pump and vibrating membrane for representative conditions

Info

Publication number
DE3039050A1
DE3039050A1 DE19803039050 DE3039050A DE3039050A1 DE 3039050 A1 DE3039050 A1 DE 3039050A1 DE 19803039050 DE19803039050 DE 19803039050 DE 3039050 A DE3039050 A DE 3039050A DE 3039050 A1 DE3039050 A1 DE 3039050A1
Authority
DE
Germany
Prior art keywords
membrane
gas exchange
crank
test stand
suction pump
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
DE19803039050
Other languages
German (de)
Other versions
DE3039050C2 (en
Inventor
Hans-Jürgen Dipl.-Ing. 7000 Stuttgart Strauber
Horst 7057 Winnenden Zielke
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19803039050 priority Critical patent/DE3039050C2/en
Publication of DE3039050A1 publication Critical patent/DE3039050A1/en
Application granted granted Critical
Publication of DE3039050C2 publication Critical patent/DE3039050C2/en
Expired legal-status Critical Current

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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
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Engines (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

A test fixture for measuring the quantity of oil leaking from a valve shaft seal is applicable to vehicle i.c. cylinder heads with camshafts actuating the valves. The fixture is a simple improvement on similar arrangements enabling fully representative operating conditions to be set up in the gas mixing channel (3). A device (4) for generating vibrations is placed in the gas exchange channel (3). It consists of a membrane (5) in a vibration tube (15) and a speed regulated electric motor (7) driving the membrane via a crank system (6). The vibration pipe (15) is connected to a suction pump (13). The crank (8) has a adjustable point (11) of connection to the connecting rod (10). The arrangement enables representative fluctuations to be superimposed on a representative pipe pressure.

Description

'tPrüfstandsvorrichtung zum Messen der't Test bench device for measuring the

Leckölmenge an Ventilschaftabdichtungen Die Erfindung beieht sich auf eine Prüfstandsvorrichtung zum Messen der Leckölmenge an Ventilschaftabdichtungen in einem für Brennkraftmaschinen vorgesehenen Zylinderkopf mit einer Ventile betätigenden Nockenwelle, die von einem Elektromotor antreibbar ist, mit einem Schmierölzulauf für die Ventiltriebteile und einem unter dem Zylinderkopf angeordneten die Leckölmenge aufnehmenden Meßbehälter sowie mit einer mit einem Gaswechselkanal verbundenen Unterdruckpumpe. Leakage Amount of Valve Stem Seals The invention relates on a test bench device for measuring the amount of leakage oil at valve stem seals in a cylinder head intended for internal combustion engines with a valve actuating Camshaft, which can be driven by an electric motor, with a lubricating oil inlet for the valve train parts and one arranged under the cylinder head for the amount of leakage oil receiving measuring container and with a vacuum pump connected to a gas exchange channel.

Zum Messen der den Ventilpartien zuzuordnenden Leckölmenge bei Otto- und Dieselmotoren wird bekanntlich ein Original-Zylinderkopf herangezogen. Um nch einem Dauerlauf innerhalb eines bestimmten Zeitraumes oder nach einer angenommenen Fahrstrecke die Leckölmenge ermitteln zu können' wird in, dem Gaswechselventil mittels einer Unterdruckpumpe ein den Betriebszuständen der Brennkraftmaschine angepaßter Unterdruck erzeugt (-Fachschrift E9, Goetzewerke A6, Burscheid).To measure the amount of leakage oil to be assigned to the valve sections in the case of gasoline and diesel engines, as is well known, an original cylinder head is used. To nch an endurance run within a certain period of time or after an assumed one Driving distance to be able to determine the amount of leakage oil 'is in, the gas exchange valve by means of a vacuum pump adapted to the operating conditions of the internal combustion engine Negative pressure generated (-letters E9, Goetzewerke A6, Burscheid).

Der Erfindung liegt die Aufgabe zugrunde, eine Prüfstandsvorrichtung der eingangs genannten Art durch einfache Maßnahmen so zu verbessern' daß in dem Gaswechselkanal Betriebszustände geschaffen werden, die den tatsächlichen Betriebszuständen einer Brennkraftmaschine voll entsprechen.The invention is based on the object of a test stand device of the type mentioned above by simple measures so to improve ' that operating states are created in the gas exchange channel which correspond to the actual Fully correspond to operating states of an internal combustion engine.

Die Aufgabe wird gemäß der Erfindung dadaurch gelöst, daß an dem Gaswchselkan,al eine Schwingungen erzeugende Einrichtung angeschlossen ist.The object is achieved according to the invention in that on the Gaswchselkan, al a vibration generating device is connected.

Mit, einer derartigen Prüfstandsvorrichtung ist neben der Erzeugung eines bestimmten Unterdrucks auch die Simulierung von in dem Gaswechselkanal einer Brennkraftmaschine auftretenden üblichen Schwingungen möglich, so daß eine exakte Leckölmengenmessung durchführbar ist.With, such a test rig device is next to the generation of a certain negative pressure also the simulation of a in the gas exchange channel Internal combustion engine occurring usual vibrations possible, so that an exact Leakage measurement is feasible.

Eine bevorzugte Ausführungsform der Erfindung ergibt sich dadurch, daß die Einrichtung eine Membran in einem mit dem Gaswechselkanal verbundenen Schwingrohr und einen die Membran über einen Kurbeltrieb antreibbaren drehzahlgeregelten Elektromotor aufweist.A preferred embodiment of the invention results from that the device has a membrane in an oscillating tube connected to the gas exchange duct and a speed-regulated electric motor that can be driven by a crank mechanism to drive the membrane having.

ueber die Membrane ist somit das Überlagern einer beliebigen Pulsfrequenz möglich.The membrane can be used to superimpose any pulse frequency possible.

In vorteilhafter Weise kann die Unterdruckpumpe mit dem Schwingrohr in Verbindung stehen.Advantageously, the vacuum pump with the oscillating tube stay in contact.

In weiterer Ausgestaltung der Erfindung kann der aus Kurbel und Pleuelstange bestehende Kurbeltrieb an seiner Kurbel einen verstellbaren Anlenkpunkt für die Pleuelstange aufweisen, um auf diese einfache Weise den Hub der Membran und somit die Unterdruckamplitude beliebig verändern zu können.In a further embodiment of the invention, the crank and connecting rod can existing crank mechanism on its crank an adjustable pivot point for the Have connecting rod to in this simple way the stroke of the diaphragm and thus to be able to change the vacuum amplitude at will.

Die Erfindung ist anhand eines in der Zeichnung veranschaulichten Ausführungsbeispieles im folgenden näher erläutert.The invention is illustrated by means of one in the drawing Embodiment explained in more detail below.

Zum Messen der Leckölmenge an Ventilschaftabdichtungen wird ein Originalzylinderkopf 1 einer bekannten Brennkraftmaschine verwendet. Für den Antrieb der Nockenwelle 2 ist in diesem Fall ein Elektromotor (nicht dargestellt) vorgesehen. An den Zylinderkopf 1 im Bereich des Qaswechselkanals 3 wird eine Einrichtung 4 angeflanscht, die aus einer Membran 5, einem Kurbeltrieb 6 und einem drehzahlgesteuerten Elektromotor 7 besteht. Der Kurbeltrieb 6 weist eine Kurbel 8 mit einem Langloch 9 auf, in dem die Pleuelstange 10 gelagert ist. Der Anlenkpunkt 11 der Pleuelstange ist zwecks Änderung des Membranhubs in dem Langloch 9 verstellbar. Das andere Ende der Pleuelstange ist mit einer an der Membran 5 befestigten Hubstange 12 gelenkig verbunden.An original cylinder head is used to measure the amount of leakage oil at valve stem seals 1 used a known internal combustion engine. For driving the camshaft 2 an electric motor (not shown) is provided in this case. To the cylinder head 1 in the area of the Qaswechselkanals 3 a device 4 is flanged, which from a membrane 5, a crank mechanism 6 and a speed-controlled electric motor 7 consists. The crank mechanism 6 has a crank 8 with an elongated hole 9 in which the connecting rod 10 is mounted. The articulation point 11 of the connecting rod is for the purpose Change of the diaphragm stroke in the elongated hole 9 is adjustable. The other end of the connecting rod is articulated to a lifting rod 12 attached to the membrane 5.

Ferner ist eine Unterdruckpumpe 13 vorgesehen, die über eine Anschlußleitung 14 mit dem zum Gaswechselkanal 3 hinführenden Schwingrohr 15 der Einrichtung 4 verbunden ist.Furthermore, a vacuum pump 13 is provided, which via a connecting line 14 is connected to the oscillating pipe 15 of the device 4 leading to the gas exchange duct 3 is.

An dem Zylinderkopf 1 im Bereich des Ventiltellers 16 des Gaswechselventiles 17 ist ein die Leckölmenge auffangender Meßbehälter 18 befestigt.On the cylinder head 1 in the area of the valve disk 16 of the gas exchange valve 17, a measuring container 18 which collects the amount of leakage oil is attached.

In dem Zylinderkopf 1 befindet sich noch ein Schmierölzulauf 19 sowie ein Schmierölablauf 20.In the cylinder head 1 there is also a lubricating oil inlet 19 as well as a lubricating oil drain 20.

Mit einer derartigen Prüfstandsvorrichtung können die motortypischen, saugseitigen Betriebszustände einer Brennkraftmaschine simuliert und somit eine exakte Messung der Leckölmengen durchgeführt werden.With such a test stand device, the typical engine, Simulated suction-side operating states of an internal combustion engine and thus a exact measurement of the leakage oil quantities can be carried out.

LeerseiteBlank page

Claims (4)

Ansprüche i;l Prüfstandsvorrichtung zum Messen der Leckölmenge an Ventilschaftabdichtungen in einem für Brennkraftmaschinen vorgesehenen Zylinderkopf mit einer Ventile betätigenden Nockenwelle, die von einem Elektromotor antreibbar ist, mit einem Schmierölzulauf für die Ventiltriebteile und einem unter dem Zylinderkopf angeordneten, die Leckölmenge aufnehmenden Meßbehälter sowie'mit einer mit einem Gaswechselkanal verbundenen Unterdruckpumpe, d a -d u r c h g e k e n n z e i c h n e t; daß an dem Gaswechselkanal (3) eine Schwingungen erzeugende Einrichtung (4) angeschlossen ist.Claims i; l test stand device for measuring the amount of leakage oil Valve stem seals in a cylinder head intended for internal combustion engines with a valve-actuating camshaft that can be driven by an electric motor is, with a lubricating oil inlet for the valve train parts and one under the cylinder head arranged, the amount of leak oil receiving the measuring container as well as'mit one with a Vacuum pump connected to the gas exchange duct, d a -d u r c h e k e n n n z e i c h n e t; that a vibration generating device on the gas exchange channel (3) (4) is connected. 2. Prüfstandsvorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Einrichtung (4) eine Membran (5) in einem mit.dem Gaswechselkanal (3) verbundenen Schwingrohr (15) und einen die Membran (5)-über einen Kurbeltrieb (6) antreibbaren drehzahlgeregelten Elektromotor (7) aufeist.2. Test stand device according to claim 1, d a d u r c h g e k e n It is noted that the device (4) has a membrane (5) in a gas exchange channel (3) connected oscillating tube (15) and a membrane (5) via a crank mechanism (6) drivable speed-controlled electric motor (7) aufeist. 3 Prüfstandsvorrichtung nach den Ansprüchen 1 und 2, d a d u r c h g e k e n n z e i c h n e t, daß die Unterdruckpumpe (13) mit dem Schwingrohr (15) in Verbindung steht.3 test stand device according to claims 1 and 2, d a d u r c h it is not indicated that the vacuum pump (13) with the oscillating tube (15) communicates. 4. Prüfstandsvorrichtung nach den Ansprüchen 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, daß die Kurbel (8) des Kurbeltriebs (6) einen verstellbaren Anlenkpunkt (11) für die Pleuelstange (10) aufweist.4. Test stand device according to claims 1 to 3, d a d u r c h g e k e n n n z e i c h n e t that the crank (8) of the crank drive (6) is adjustable Has pivot point (11) for the connecting rod (10).
DE19803039050 1980-10-16 1980-10-16 Test bench device for measuring the amount of leakage oil at valve stem seals Expired DE3039050C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803039050 DE3039050C2 (en) 1980-10-16 1980-10-16 Test bench device for measuring the amount of leakage oil at valve stem seals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803039050 DE3039050C2 (en) 1980-10-16 1980-10-16 Test bench device for measuring the amount of leakage oil at valve stem seals

Publications (2)

Publication Number Publication Date
DE3039050A1 true DE3039050A1 (en) 1982-04-22
DE3039050C2 DE3039050C2 (en) 1983-06-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518758A1 (en) * 1991-06-14 1992-12-16 Renault Automation Procedure and device for controlling the correct realisation of an assembly
DE202009004133U1 (en) 2009-03-21 2009-06-04 IAMT Prüfsysteme GmbH Test bench with adjustable crank drive and servo motor for tension and compression testing
CN102313630A (en) * 2010-07-07 2012-01-11 广西玉柴机器股份有限公司 Method for quickly and actually measuring sealing performance of valve oil seal of engine
CN114111668A (en) * 2021-12-07 2022-03-01 北京蔚海明祥科技有限公司 Be used for stay-supported displacement sensor reliability cycle testing arrangement

Non-Patent Citations (1)

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518758A1 (en) * 1991-06-14 1992-12-16 Renault Automation Procedure and device for controlling the correct realisation of an assembly
FR2677762A1 (en) * 1991-06-14 1992-12-18 Renault Automation METHOD AND DEVICE FOR MONITORING THE CORRECT REALIZATION OF AN ASSEMBLY.
DE202009004133U1 (en) 2009-03-21 2009-06-04 IAMT Prüfsysteme GmbH Test bench with adjustable crank drive and servo motor for tension and compression testing
CN102313630A (en) * 2010-07-07 2012-01-11 广西玉柴机器股份有限公司 Method for quickly and actually measuring sealing performance of valve oil seal of engine
CN114111668A (en) * 2021-12-07 2022-03-01 北京蔚海明祥科技有限公司 Be used for stay-supported displacement sensor reliability cycle testing arrangement

Also Published As

Publication number Publication date
DE3039050C2 (en) 1983-06-23

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