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WO2017001090A1 - Procédé de surveillance de la capacité de fonctionnement d'une pompe conçue pour le refoulement d'un fluide - Google Patents

Procédé de surveillance de la capacité de fonctionnement d'une pompe conçue pour le refoulement d'un fluide Download PDF

Info

Publication number
WO2017001090A1
WO2017001090A1 PCT/EP2016/060252 EP2016060252W WO2017001090A1 WO 2017001090 A1 WO2017001090 A1 WO 2017001090A1 EP 2016060252 W EP2016060252 W EP 2016060252W WO 2017001090 A1 WO2017001090 A1 WO 2017001090A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
roller
determined
pressure
fluid
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.)
Ceased
Application number
PCT/EP2016/060252
Other languages
German (de)
English (en)
Inventor
Markus MAUEL
Arno Lorenz
Frieder Necker
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
Publication of WO2017001090A1 publication Critical patent/WO2017001090A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system

Definitions

  • the invention relates to a method for checking the operability of a designed for the promotion of a fluid pump, in particular a
  • the invention has for its object to provide a method for checking a pump, with the reliability of the pump or a pump-containing system is improved.
  • the pump is then continuously or intermittently sensory checked during operation (including a start case) to determine whether an operating condition exists that can cause damage to the pump. For this purpose, in particular, it is checked whether an operating state value sensory recorded during operation coincides with a stored operating value.
  • the advantage of this method is that on the one hand the intended use of the pump for the test must not be interrupted and on the other hand, a possible damage to the pump can be detected very early. As a result, for example, due to an entry stored in a fault memory in a routine inspection of the pump or the system on which the pump is installed, to be checked whether a repair or replacement of the pump is required.
  • the pump is intended to be filled and operated with a defined fluid.
  • this is a fuel, for example diesel fuel. If now the pump is operated with an inferior or wrong fuel, this can be based on
  • Deviating structure-borne sound signals are determined.
  • the degree of filling of the engine is determined.
  • Experiences determined in corresponding tests show that the degree of filling of the engine compartment at least with
  • Engine room determined This also makes it possible to reliably determine whether the engine room is sufficiently filled with fuel.
  • This process step may alternatively or in addition to the determination of the degree of filling of
  • a high-pressure pump of a common-rail injection system has a drive shaft, such as an eccentric shaft or camshaft, on which rolls a roller of a roller tappet for driving a fuel pump piston conveying. Now occurs between the roller and the drive shaft or between the roller and a roller shoe of the roller tappet on a poor hydrodynamic lubricant film, this is a special burden on the pump. This possible load is due to the
  • Fuel parameters such as a low vapor pressure, a low
  • Lubricity a low viscosity, a water content, a
  • Particle or other deposits are caused.
  • external influences outside the specification may also be present, for example an increased pump inlet temperature of the fuel, in particular at a particularly low ambient pressure. This one
  • Damage to the pump may be caused by comparing a current speed of the roller of the pump with a potential triggering criteria
  • the rotational speed of the roller is acoustically detected by means are provided on the pump, which cause dependent on the speed of the pump pressure pulsations. These pressure pulsations can in turn be sensed without problems.
  • the means are mounted on a front side of the roller grooves.
  • Frequency spectrum can be stimulated, the use of a filter may be useful.
  • the filter should allow a band of frequencies to pass, which is a known expectation of the pressure pulsations of the pulley.
  • the rolling condition of the roller on the drive shaft for example, the camshaft. It depends on the speed of the pump, the cam shape, the roller diameter and the position of the roller on the camshaft. If the filter is tuned exactly to the expected frequency, it can be concluded from a drop in the measured frequency or below a threshold value to slip between the roller and the camshaft.
  • the rotational speed of the roller is detected inductively by means are provided on the roller, the inductively a
  • This method step is provided alternatively or in addition to the previously described acoustic determination of the rotational speed of the roller.
  • means in the form of structural changes for example in the form of structures / grooves are introduced on the roller, for example on one or both end faces and / or a shell side, by means of an inductive pulse generator, for example in the manner of a permanent magnet with an electric conductive coil / coil, or a field plate encoder can be detected without contact in their position change by their rotational movement.
  • an inductive pulse generator for example in the manner of a permanent magnet with an electric conductive coil / coil, or a field plate encoder can be detected without contact in their position change by their rotational movement.
  • Evaluation with the calibration with rotational sensor information at the drive of the pump and the known geometric relationships can be determined whether the roller rotates at the correct speed and thus there is no slip against the cam.
  • the measured values which are identified as being damaging the pump are stored and / or displayed and / or cause an intervention in the conveying characteristic of the pump.
  • Different values can be considered here.
  • an intervention in the delivery characteristic of the pump is provided if a serious deviation of the pump operating values from reference values occurs.
  • Figure 1 is a schematic sectional view of a high pressure pump designed as a pump of a common rail injection system of an internal combustion engine and
  • Figure 2 is a detail view of a camshaft with a
  • trained pump is a fluid from a low-pressure fuel system
  • High-pressure accumulator is promoted.
  • fuel is stored up to a pressure of 3,000 bar and discharged from
  • the high-pressure pump 1 has a pump housing 2 with an engine compartment 17, in which a drive shaft in the form of a camshaft 3 is rotatably mounted.
  • the camshaft 3 is from the internal combustion engine, at the
  • High pressure pump 1 is installed, with one to the crankshaft of the
  • the camshaft 3 has, for example, two opposite cams 4a, 4b.
  • Pump housing 2 of the high pressure pump 1 is at least one integrally formed preferably integrally with a pump cylinder head 5
  • Pump cylinder 6 connected in which a pump piston 7 is guided axially displaceable.
  • the pump piston 7 cooperates with the camshaft side with a roller tappet 8, which is guided in a recess 13 in the pump housing 2.
  • the pump piston 7 by a pump spring 9, which is supported on the pump cylinder head 5 and a support plate 10 against a shoulder 11 of a plunger body 12 of the roller tappet 8, against the camshaft third or their cams 4a, 4b pressed.
  • On the opposite side to the support disk 10 is located on the shoulder 11 of the plunger body 12, a roller shoe 14 of the roller tappet 8, in which a cylinder-section-shaped recess 15 is inserted, in which a roller 16 of the roller tappet 8 is inserted.
  • the roller 16 rolls in a rotational movement of the camshaft 3 on this or the cam 4a, 4b and sets the rotational movement of the camshaft 3 in the translational up and down movement of
  • Pump piston 7 um which promotes in a arranged in the pump cylinder head 5 pump working chamber via a suction valve fuel in an upward movement via a check valve and a pressure line in the high-pressure accumulator.
  • the roller 16 During operation of the high-pressure pump 1, there may be slippage of the roller 16 with respect to the camshaft 3 or its cams 4a, 4b and / or the recess 15 in the roller shoe 14. This slip can be determined by the sensor according to the invention. This slip can lead to damage to the high-pressure pump 1. Additively or alternatively, it can be determined whether the engine compartment 17 of the high-pressure pump 1 accommodating the camshaft 3 is filled with fuel. This located in the engine compartment 17 fuel lubricates the moving components of the
  • High-pressure pump 1 in particular the roller 16 relative to the roller shoe 14 or the recess 15 and the camshaft 3. Furthermore, the components of the high pressure pump 1 are cooled by the fuel. In this case, a defined amount of fuel is normally continuously introduced into the engine compartment 17 and also discharged again. If a wrong fuel or too little fuel or a mixture of fuel and air or fuel vapors is introduced into the engine compartment 17, this is also determined by sensors. The "incorrect filling" of the engine compartment can also lead to damage to the high-pressure pump 1. The determination is made by an acceleration sensor 18, which is shown only schematically, which is arranged on the pump housing 2 and the structure-borne noise at the
  • Figure 2 shows a perspective view of the interaction of
  • the equipment of the high-pressure pump 1 with the acceleration sensor 18 are on the roller 16 frontally grooves 19 are mounted, which in response to the speed of the high-pressure pump 1 pressure pulsations cooperating with the roller tappet 8 or the
  • Figure 1 sensor 20 shown or determines the rotational movement of the roller 16 is inductively detected by an induction sensor which is disposed adjacent to an end face of the roller 16 opposite to the grooves 19 in the pump housing 2.
  • the induction sensor is designed so that from this, the rotational movement of the roller 16 unaffected by the
  • the induction sensor is arranged on the roller tappet 8 and thus follows its translational up and down movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un procédé de surveillance de la capacité de fonctionnement d'une pompe conçue pour le refoulement d'un fluide, en particulier d'une pompe haute pression (1) d'un système d'injection à rampe commune de moteur à combustion interne. Elle concerne précisément un procédé de surveillance de pompe, selon lequel la fiabilité de la pompe ou d'un système contenant ladite pompe est améliorée. À cet effet, ladite pompe est surveillée à l'aide de capteurs pendant son fonctionnement de manière à détecter si elle se trouve dans un état de fonctionnement qui peut entraîner sa détérioration.
PCT/EP2016/060252 2015-07-02 2016-05-09 Procédé de surveillance de la capacité de fonctionnement d'une pompe conçue pour le refoulement d'un fluide Ceased WO2017001090A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015212426.6A DE102015212426A1 (de) 2015-07-02 2015-07-02 Verfahren zum Überprüfen der Funktionsfähigkeit einer zur Förderung eines Fluids ausgelegten Pumpe
DE102015212426.6 2015-07-02

Publications (1)

Publication Number Publication Date
WO2017001090A1 true WO2017001090A1 (fr) 2017-01-05

Family

ID=56024251

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/060252 Ceased WO2017001090A1 (fr) 2015-07-02 2016-05-09 Procédé de surveillance de la capacité de fonctionnement d'une pompe conçue pour le refoulement d'un fluide

Country Status (2)

Country Link
DE (1) DE102015212426A1 (fr)
WO (1) WO2017001090A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2568089A (en) * 2017-11-06 2019-05-08 Delphi Tech Ip Ltd Fuel pump with accelerometer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0554640A1 (fr) * 1992-02-07 1993-08-11 Sulzer Pumpen Ag Procédure et dispositif pour la détermination de l'érosion occasionnée par le cavitation d'éléments traversés par un écoulement de fluides
WO1997038292A1 (fr) * 1996-04-11 1997-10-16 Rosenhave Per Einar Controle acoustique de l'etat d'objets
US20040167738A1 (en) * 2003-02-21 2004-08-26 Miller J. Davis System and method for power pump performance monitoring and analysis
WO2009106421A1 (fr) * 2008-02-25 2009-09-03 Siemens Aktiengesellschaft Procédé et dispositif pour déterminer une fuite dans un composant d'installation et/ou un état d'un composant d'installation
US20100300683A1 (en) * 2009-05-28 2010-12-02 Halliburton Energy Services, Inc. Real Time Pump Monitoring
DE102011084906A1 (de) * 2011-10-20 2013-04-25 Endress+Hauser Meßtechnik GmbH+Co.KG Verfahren zur Überwachung einer Pumpe für Flüssigkeiten und Pumpe
DE102012107596A1 (de) * 2012-08-20 2014-03-13 Denso Corporation Hochdruckpumpe und Verfahren zum Betrieb einer Hochdruckpumpe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009045369A1 (de) 2009-10-06 2011-04-07 Robert Bosch Gmbh Verfahren zum Überprüfen der Funktionsfähigkeit einer Hochdruckpumpe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0554640A1 (fr) * 1992-02-07 1993-08-11 Sulzer Pumpen Ag Procédure et dispositif pour la détermination de l'érosion occasionnée par le cavitation d'éléments traversés par un écoulement de fluides
WO1997038292A1 (fr) * 1996-04-11 1997-10-16 Rosenhave Per Einar Controle acoustique de l'etat d'objets
US20040167738A1 (en) * 2003-02-21 2004-08-26 Miller J. Davis System and method for power pump performance monitoring and analysis
WO2009106421A1 (fr) * 2008-02-25 2009-09-03 Siemens Aktiengesellschaft Procédé et dispositif pour déterminer une fuite dans un composant d'installation et/ou un état d'un composant d'installation
US20100300683A1 (en) * 2009-05-28 2010-12-02 Halliburton Energy Services, Inc. Real Time Pump Monitoring
DE102011084906A1 (de) * 2011-10-20 2013-04-25 Endress+Hauser Meßtechnik GmbH+Co.KG Verfahren zur Überwachung einer Pumpe für Flüssigkeiten und Pumpe
DE102012107596A1 (de) * 2012-08-20 2014-03-13 Denso Corporation Hochdruckpumpe und Verfahren zum Betrieb einer Hochdruckpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2568089A (en) * 2017-11-06 2019-05-08 Delphi Tech Ip Ltd Fuel pump with accelerometer

Also Published As

Publication number Publication date
DE102015212426A1 (de) 2017-01-05

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