DE10360337A1 - Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned - Google Patents

Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned Download PDF

Info

Publication number
DE10360337A1
DE10360337A1 DE2003160337 DE10360337A DE10360337A1 DE 10360337 A1 DE10360337 A1 DE 10360337A1 DE 2003160337 DE2003160337 DE 2003160337 DE 10360337 A DE10360337 A DE 10360337A DE 10360337 A1 DE10360337 A1 DE 10360337A1
Authority
DE
Germany
Prior art keywords
leak
tank system
precision
conforms
concerned
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Withdrawn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
DE2003160337
Other languages
German (de)
Inventor
Tilo Faul
Holger Nagel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE2003160337 priority Critical patent/DE10360337A1/en
Publication of DE10360337A1 publication Critical patent/DE10360337A1/en
Withdrawn legal-status Critical Current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
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/007—Leak detector calibration, standard leaks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The process involves subjecting a precision leak (100) to a pressure for leakage calibration. The hole has 0.020 inch opening (110) comprising a recess (120) on both sides of the opening. The precision leak conforms to Standards of Californian Air Resource Board (CARB), when shape and dimension of the precision leak are concerned, to ascertain the size or magnitude of the leak in a tank system. An independent claim is also included for a device for detecting leakages in a tank system having an electric pump.

Description

Die Erfindung geht aus von einer Vorrichtung zur Erkennung von Lecks in einem Tanksystem nach der Gattung des unabhängigen Anspruchs.The The invention is based on a device for detecting leaks in a tank system according to the preamble of the independent claim.

Stand der TechnikState of technology

Die kalifornische Umweltbehörde CARB (Californian Air Recources Board) genauso wie amerikanische Bundesbehörden fordern bei Kraftfahrzeugen eine bordeigene Diagnose (on-board-diagnose (OBD) zur Erkennung von Kleinstlecks (>= 0,5 mm) und Groblecks (>= 1,0 mm) im Tanksystem.The California Environmental Agency CARB (Californian Air Recources Board) as well as American federal authorities demand on-board diagnosis of motor vehicles (on-board diagnostics (OBD) for the detection of small leaks (> = 0.5 mm) and large baffles (> = 1.0 mm) in the tank system.

Aus der DE 102 04 132 A1 ist bereits ein Verfahren und eine Vorrichtung zur Dichtheitsprüfung eines Behältnisses bekannt, bei dem mit mindestens einer Druckquelle ein Referenzleck oder das Behältnis mit einem Über- oder Unterdruck beaufschlagt und dabei jeweils mindestens eine Kenngröße der Druckquelle ermittelt wird. Die Kenngrößen werden miteinander verglichen und aus dem Ergebnis des Vergleichs auf das Vorhandensein eines Lecks geschlossen.From the DE 102 04 132 A1 A method and a device for leak testing of a container is already known in which a reference leak or the container is acted upon by at least one pressure source with an overpressure or underpressure and in each case at least one parameter of the pressure source is determined. The parameters are compared with each other and concluded from the result of the comparison on the presence of a leak.

Vorteile der ErfindungAdvantages of invention

Erfindungsgemäß wird bei der Erkennung von Lecks in einem Tanksystem die Leckerkennung mit Hilfe eines Referenzlecks kalibriert. In vorteilhafter Weise entspricht das Referenzleck in Geometrie und Abmessungen einem genormten Standard. Dies hat den besonderen Vorteil, dass bei der Kalibrierung der Leckdiagnose die gleichen Bedingungen und Strömungsverhältnisse herrschen, wie sie den genormten Standard bereits be kannt sind und so die ermittelten Kenngrößen direkt mit Kenngrößen, die für den genormten Standard bekannt sind in einfacher Weise verglichen werden können.According to the invention is at the detection of leaks in a tank system with the leak detection Help of a reference leak calibrated. In an advantageous manner corresponds the reference leak in geometry and dimensions a standardized standard. This has the particular advantage that when calibrating the leak diagnosis the same conditions and flow conditions prevail, as they are already known to the standardized standard and so the determined parameters directly with characteristics that for the standardized standard are known to be compared in a simple manner can.

Von besonderem Vorteil ist es, ein Referenzleck zu verwenden, dass in Geometrie und Abmessungen einem Standard der Californian Air Recources Board (CARB) entspricht. Dies hat den Vorteil, dass die gewonnen Kenngrößen direkt mit Kenngrößen der CARB zu vergleichen sind und so Fehlerkennungen oder -messungen schnell erkannt und behoben werden können.From It is particularly advantageous to use a reference leak that in Geometry and dimensions a standard of Californian Air Recources Board (CARB) corresponds. This has the advantage of being won Characteristics directly with characteristics of the CARB are to be compared and so error detections or measurements can be quickly detected and corrected.

Es zeigen:It demonstrate:

1 ein Referenzleck gemäß des bekannten Stands der Technik; 1 a reference leak according to the known art;

2 eine schematische Darstellung eines erfindungsgemäßen Referenzlecks gemäß der CARB-Vorschriften 2 a schematic representation of a reference leak according to the invention according to the CARB regulations

Beschreibungdescription

Zur Diagnose eines Lecks in einem Tanksystem ist es typischerweise vorgesehen, dass ein Tankleckdiagnosemodul (DTML) im Tank einen Überdruck aufbaut. Zum Aufbau des Überdrucks wird eine elektrische Pumpe betrieben, wobei die Stromaufnahme der elektrischen Pumpe mit dem Tankdruck korreliert. Aus dem Verlauf und der Höhe des sich einstellenden elektrischen Pumpenstroms wird auf die Größe des Lecks geschlossen.to Diagnosing a leak in a tank system is typically provided that a Tank Leak Diagnostic Module (DTML) in the tank overpressures builds. To build up the overpressure an electric pump is operated, the current consumption of electric pump correlated with the tank pressure. From the course and the height the adjusting electrical pump current is based on the size of the leak closed.

Weiterhin ist vorgesehen, dass vor jeder Diagnose eine Kalibrierungsmessung durchgeführt wird. Dazu ist das Tankleckdiagnosemodul (DMTL) mit einem 0,5 mm großen Referenzleck ausgestattet. Durch dieses Leck wird zu Anfang der Diagnose Luft gepumpt, um damit die aktuellen Schwellen zu berechnen. Wie in 1 gezeigt, ist das Referenzleck 1 bislang als flache Scheibe mit einer im Durchmesser 0,5 mm großen Öffnung 10 ausgeführt.Furthermore, it is provided that a calibration measurement is carried out before each diagnosis. For this purpose, the tank leak diagnosis module (DMTL) is equipped with a 0.5 mm reference leak. This leak pumps air at the beginning of the diagnostic to calculate the current thresholds. As in 1 shown is the reference leak 1 so far as a flat disc with a diameter of 0.5 mm large opening 10 executed.

Erfindungsgemäß ist nun vorgesehen, als Referenzleck nicht eine einfache Blende mit einer 0,5 mm großen Öffnung vorzusehen, sondern in vorteilhafter Weise ein Präzisionsleck 100 gemäß eines genormten Standards. 2 zeigt ein Präzisionsleck 100 mit einer 0,020 inch großen Öffnung 110 mit einer rotationssymmetrischen Ausnehmung 120 auf beiden Seiten der Öffnung. Das Präzisionsleck 100 entspricht sowohl in der Geometrie als auch in den Abmessungen einem Referenzleck bzw. einem Messleck für externe Mes sungen gemäß den Bestimmungen der CARB. Derartige Präzisionslecks sind beispielsweise über die Firma O'Keefe Controls Co. unter der Teile Nr. B-20-SS; 0,020 inch Durchmesser zu beziehen.According to the invention, it is now provided to provide as reference leak not a simple aperture with a 0.5 mm aperture, but advantageously a precision leak 100 according to a standardized standard. 2 shows a precision leak 100 with a 0.020 inch opening 110 with a rotationally symmetrical recess 120 on both sides of the opening. The precision leak 100 Corresponds both in the geometry and in the dimensions of a reference leak or a measurement leak for external Mes solutions according to the provisions of the CARB. Such precision leaks are known, for example, from O'Keefe Controls Co. under Part No. B-20-SS; 0.020 inch diameter.

Claims (4)

Verfahren zur Erkennung von Lecks in einem Tanksystem, wobei zur Kalibrierung ein Referenzleck mit Druck beaufschlagt wird, dadurch gekennzeichnet, dass das Referenzleck in Geometrie und Abmessungen einem genormten Standard genügt.A method for detecting leaks in a tank system, wherein for calibration a reference leak is pressurized, characterized in that the reference leak in geometry and dimensions meets a standard standard. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass das Referenzleck in Geometrie und Abmessungen einem Standard der Californian Air Recources Board (CARB) entspricht.Method according to claim 1, characterized in that the reference leak in geometry and Dimensions a standard of Californian Air Recources Board (CARB) equivalent. Vorrichtung zur Erkennung von Lecks in einem Tanksystem, mit einer elektrischen Pumpe, durch welche über ein Schaltmittel entweder ein Tank oder zur Kalibrierung ein Referenzleck mit Druck beaufschlagbar ist, wobei aus einem Verlauf und der Höhe des sich einstellenden elektrischen Pumpestroms auf ein Größe eines Lecks im Tanksystem ermittelbar ist, dadurch gekennzeichnet, dass das Referenzleck in Geometrie und Abmessungen einem genormten Standard genügt.Apparatus for detecting leaks in a tank system, comprising an electric pump, by means of which a switching means either a tank or for calibration a reference leak can be pressurized, wherein from a course and the height of the self-adjusting electric pumping current a size of a leak in the tank system can be determined, characterized in that the reference leak in geometry and dimensions meets a standard standard. Vorrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass das Referenzleck in Geometrie und Abmessungen einem Standard der Californian Air Recources Board (CARB) entspricht.Device according to claim 3, characterized in that the reference leak in geometry and Dimensions a standard of Californian Air Recources Board (CARB) equivalent.
DE2003160337 2003-12-20 2003-12-20 Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned Withdrawn DE10360337A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2003160337 DE10360337A1 (en) 2003-12-20 2003-12-20 Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2003160337 DE10360337A1 (en) 2003-12-20 2003-12-20 Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned

Publications (1)

Publication Number Publication Date
DE10360337A1 true DE10360337A1 (en) 2005-07-14

Family

ID=34672992

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2003160337 Withdrawn DE10360337A1 (en) 2003-12-20 2003-12-20 Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned

Country Status (1)

Country Link
DE (1) DE10360337A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2913497A1 (en) * 2007-03-05 2008-09-12 Trace Sarl Calibrated leak device for motor vehicle field, has unit applying forces on end surfaces of ring to form deformation such that ring wall is plated against sleeve wall, and connecting unit connecting sleeve ends with fluid volume and meter
DE102009036263A1 (en) 2009-08-05 2011-02-10 Daimler Ag Method for performing tightness test of tank system of internal combustion engine utilized in motor vehicle, involves performing leakage testing in partial space of tank system comprising storage and line between storage and valve
DE102009036265A1 (en) 2009-08-05 2011-02-10 Daimler Ag Method for testing leakage of tank system of internal combustion engine of e.g. hybrid vehicle, involves implementing leakage testing based on comparison of detected and adjusted pressures and/or temporal changing of detected pressure
DE102012008686A1 (en) 2012-04-28 2013-10-31 Audi Ag Method for determining a leak in a tank ventilation device of a motor vehicle and motor vehicle
DE102013012881A1 (en) 2013-08-01 2015-02-05 Daimler Ag Method for detecting a leak in a fuel system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2913497A1 (en) * 2007-03-05 2008-09-12 Trace Sarl Calibrated leak device for motor vehicle field, has unit applying forces on end surfaces of ring to form deformation such that ring wall is plated against sleeve wall, and connecting unit connecting sleeve ends with fluid volume and meter
DE102009036263A1 (en) 2009-08-05 2011-02-10 Daimler Ag Method for performing tightness test of tank system of internal combustion engine utilized in motor vehicle, involves performing leakage testing in partial space of tank system comprising storage and line between storage and valve
DE102009036265A1 (en) 2009-08-05 2011-02-10 Daimler Ag Method for testing leakage of tank system of internal combustion engine of e.g. hybrid vehicle, involves implementing leakage testing based on comparison of detected and adjusted pressures and/or temporal changing of detected pressure
DE102009036263B4 (en) 2009-08-05 2022-06-30 Mercedes-Benz Group AG Procedure for leak testing a tank system and tank system
DE102012008686A1 (en) 2012-04-28 2013-10-31 Audi Ag Method for determining a leak in a tank ventilation device of a motor vehicle and motor vehicle
WO2013159890A1 (en) 2012-04-28 2013-10-31 Audi Ag Method for detecting a leak in a tank ventilation device of a motor vehicle, and motor vehicle
DE102013012881A1 (en) 2013-08-01 2015-02-05 Daimler Ag Method for detecting a leak in a fuel system

Similar Documents

Publication Publication Date Title
DE19636431B4 (en) Method and device for testing the functionality of a tank ventilation system
DE19735549B4 (en) Device for diagnosing a tank ventilation system of a vehicle
DE19809384C2 (en) Procedure for checking the functionality of a tank ventilation system
DE19648688B4 (en) Method for recording the fill level of a tank system
DE4401085C1 (en) Method and device for the stationary determination of leaks in a fuel tank venting system
DE102005027825A1 (en) Ball joint with sensor device and method for leak detection
DE10129695A1 (en) Method and device for tank leak diagnosis using a reference measurement method
EP0920611B1 (en) Diagnostic module for testing the tightness of a container
DE102019103113B4 (en) SEAL INTEGRITY VERIFICATION SYSTEM AND ELECTRIC POWER STEERING SYSTEM
DE19834332B4 (en) Method for testing the functionality of a container
DE19503311B4 (en) Apparatus for testing filter elements by a water intrusion test
DE102016107216B4 (en) Method and device for leak testing a component of a wiring harness for a vehicle
DE10360337A1 (en) Tank system`s leakage detecting process, involves subjecting precision leak to pressure, where leak conforms to standards of Californian Air Resource Board, when shape and dimension of leak are concerned
DE102013223019A1 (en) Method and device for measuring the tightness of a luminaire housing
DE10357353A1 (en) Device for testing at least one pressure sensor
DE19836967C2 (en) Procedure for checking the functionality of a container
DE102013002775A1 (en) Deforming tool e.g. transfer tool, for use in transfer press for deforming axle carriers of motor vehicle, has eddy current probe arranged in measuring head of tool, and executing crack test of axle carriers arranged in tool
DE19836295B4 (en) Procedure for checking the functionality of a vehicle tank ventilation system
DE102015016958A1 (en) Method and device for checking the tightness of at least one reactant circuit of a fuel cell system
DE4212938A1 (en) Seal testing appts. e.g. for testing vehicle shock absorber - has pressure source for filling first chamber with gas and uses pressure sensor to determine pressure increase in second chamber
DE19920767A1 (en) Arrangement for leakage testing of vehicle car bodies has gas delivery arrangement and sensor(s) for detecting gas and/or physical parameters of the gas and/or of secondary effects
DE102011080754B4 (en) Device for detecting the impact of an object on a vehicle
DE202016006152U1 (en) Measuring and testing device for the detection of bubbles in optically accessible liquids
DE102007016217A1 (en) Low pressure valve movability testing method for e.g. car, involves testing position of low pressure valve in response to increase in pressure inside of fuel system when low pressure valve resides in closed condition
DE102005045169B4 (en) Method and apparatus for filling a wheel tire mounted on a wheel rim in a tire inflation station

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20120703