DE3828933A1 - Method for monitoring a hydraulic system - Google Patents
Method for monitoring a hydraulic systemInfo
- Publication number
- DE3828933A1 DE3828933A1 DE3828933A DE3828933A DE3828933A1 DE 3828933 A1 DE3828933 A1 DE 3828933A1 DE 3828933 A DE3828933 A DE 3828933A DE 3828933 A DE3828933 A DE 3828933A DE 3828933 A1 DE3828933 A1 DE 3828933A1
- Authority
- DE
- Germany
- Prior art keywords
- current
- electronic controller
- brake
- standard
- spectra
- 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- Withdrawn
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4018—Pump units characterised by their drive mechanisms
- B60T8/4022—Pump units driven by an individual electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4031—Pump units characterised by their construction or mounting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4036—Pump units characterised by their failure-responsive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/92—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action
- B60T8/94—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action on a fluid pressure regulator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/403—Brake circuit failure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/413—Plausibility monitoring, cross check, redundancy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/08—Cylinder or housing parameters
- F04B2201/0804—Noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1209—Radial force on the bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0209—Rotational speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0211—Noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/09—Flow through the pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/13—Pressure pulsations after the pump
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Überwachung einer Hydraulikanlage, insbesondere einer hydraulischen Bremsanlage, vorzugsweise zur Regelung des hydraulischen Drucks im Rahmen einer Antiblockier- und/oder Antriebs schlupfregelung, mit einer Volumen- und/oder Druckpulsa tionen erzeugenden Einheit, beispielsweise einer oder mehrerer Pumpen.The invention relates to a method for monitoring a hydraulic system, especially a hydraulic one Brake system, preferably to control the hydraulic Pressure in the context of an anti-lock and / or drive slip control, with a volume and / or pressure pulse tion-generating unit, for example one or several pumps.
Durch die Deutsche Patentanmeldung P 37 31 603.6 ist bereits eine Bremsanlage, insbesondere für Kraftfahrzeuge mit einem Hauptzylinder, Radzylindern und einer Vorrichtung zur Antiblockierregelung bekannt geworden. Die Deutsche Patentanmeldung P 37 31 603.6 gilt nach § 3, Absatz 2, Patentgesetz, als Stand der Technik.Through the German patent application P 37 31 603.6 is already a braking system, especially for motor vehicles with a master cylinder, wheel cylinders and a device become known for anti-lock control. The German Patent application P 37 31 603.6 applies according to § 3, paragraph 2, patent law, as the state of the art.
Die Bremsanlage nach diesem Stand der Technik zeichnet sich dadurch aus, daß im Regelmodus zur Positionierung des Kolbens des Hauptzylinders in einer gewünschten Position eine Druckmittelquelle, insbesondere eine Pumpe, vorgesehen ist, deren Fördervolumen variierbar ist, die durch eine hydraulische Leitung mit dem Hauptzylinder verbunden ist und die durch ihr Fördervolumen den Kolben positioniert.The brake system according to this state of the art is characterized in that in the control mode for positioning the piston of the master cylinder in a desired one Position of a pressure medium source, in particular a pump, is provided, the funding volume is variable, the through a hydraulic line to the master cylinder is connected and the piston through their delivery volume positioned.
Der Erfindung liegen folgende Aufgaben zugrunde:The invention is based on the following objects:
Es soll eine sichere und kostengünstige Überwachung der Funktion von Hydraulikanlagen, insbesondere von hydrau lischen Bremsanlagen, erzielt werden. It is intended to monitor the Function of hydraulic systems, especially hydrau brake systems.
Insbesondere soll die Überwachung der Pumpenförderung bei hydraulischen Bremsanlagen, die mit Antiblockier- und/oder Antriebsschlupfregelung arbeiten, verbessert werden. Diese Aufgabenstellung gilt insbesondere für Bremsanlagen, wie sie im oben zitierten Stand der Technik beschrieben werden. Es gehört weiterhin zur Aufgabenstel lung, daß die Sicherheit, insbesondere beim Ausfall einkreisiger Bauteile, erhöht wird. Der Pumpenkreislauf soll überprüfbar werden.In particular, the monitoring of pump delivery should hydraulic brake systems with anti-lock and / or traction control work, improved will. This task applies in particular to Brake systems as they are in the prior art cited above to be discribed. It is still part of the job that security, especially in the event of failure single-circuit components, is increased. The pump circuit should be verifiable.
Die erfindungsgemäßen Aufgaben werden dadurch gelöst, daß permanent oder in Stichproben die Volumen- und/oder Druckpulsationsbilder aufgenommen und überprüft werden, daß die Volumen- und/oder Druckpulsationsbilder als Indiz für ein ordnungsgemäßes Funktionieren der Anlage, insbe sondere der die Volumen- und/oder Druckpulsationen erzeugenden Einheit, beispielsweise einer Pumpe, genutzt werden.The tasks according to the invention are achieved by that the volume and / or Pressure pulsation images are recorded and checked, that the volume and / or pressure pulsation images as an indication for the proper functioning of the system, esp in particular the volume and / or pressure pulsations generating unit, such as a pump used will.
Weiterhin wird vorgeschlagen, daß permanent oder in Stichproben die Körperschallspektra aufgenommen und über prüft werden, daß die Körperschallspektra als Indiz für ein ordnungsgemäßes Funktionieren der Anlage, insbesondere des die Körperschallspektra erzeugenden Bauteils, bei spielsweise Pumpenventil-, Pumpenkolben-, Rohrleitungs-, Tandemhauptzylinderventil- und/oder Motorteils, genutzt werden.It is also proposed that permanent or in Samples of the structure-borne noise spectra recorded and over be checked that the structure-borne noise spectra as an indication of the proper functioning of the system, in particular of the component generating the structure-borne noise spectra, at for example pump valve, pump piston, pipeline, Tandem master cylinder valve and / or engine part used will.
Die beiden soeben beschriebenen Verfahren können kombi niert werden.The two methods just described can be combined be kidneyed.
Zur Überwachung einer Bremsdruckregelanlage für eine Antiblockier- und/oder Antriebsschlupfregelung mit einem elektronischen Regler, in dem vorzugsweise ein Regelalgorithmus gespeichert ist, kann in weiterer Ausgestaltung der Erfindung vorgesehen werden, daß im elektronischen Regler, vorzugsweise im Rahmen des Regel algorithmus oder zusätzlich zum Regelalgorithmus, minde stens ein Volumen- und/oder Druckpulsationsbild elektro nisch gespeichert ist, das ein ordnungsgemäßes Funktio nieren der Bremsanlage repräsentiert (Standardbild), daß die aktuellen, insbesondere durch einen oder mehrere Sensoren in der Bremsanlage aufgenommenen, Volumen- und/oder Druckpulsationsbilder (aktuelle Bilder) mit dem Standardbild verglichen werden, daß bei Abweichungen eines oder mehrerer aktueller Bilder von dem Standardbild ein eine Störung anzeigendes Signal durch den elektro nischen Regler erzeugt wird.For monitoring a brake pressure control system for a Anti-lock and / or traction control with an electronic regulator, in which preferably A control algorithm is stored in another Embodiment of the invention can be provided that in electronic regulator, preferably within the scope of the rule algorithm or in addition to the control algorithm, min least a volume and / or pressure pulsation image electro nically stored, that a proper function kidneys of the brake system represented (standard picture), that the current, especially by one or more Sensors recorded in the brake system, volume and / or pressure pulsation images (current images) with the standard picture are compared, that in the case of deviations one or more current images from the standard image a signal indicating a fault by the electro African controller is generated.
Alternativ oder zusätzlich wird vorgeschlagen, daß im elektronischen Regler, vorzugsweise im Rahmen des Regelal gorithmus oder zusätzlich zum Regelalgorithmus, mindestens ein Körperschallspektrum elektronisch gespeichert ist, das ein ordnungsgemäßes Funktionieren der Bremsanlage repräsentiert (Standardspektrum), daß die aktuellen, insbesondere durch einen oder mehrere Sensoren in der Bremsanlage aufgenommenen Körperschallspektra (aktuelle Spektra) mit dem Standardspektrum verglichen werden, daß bei Abweichungen eines oder mehrerer aktueller Spektra von dem Standardspektrum ein eine Störung anzeigendes Signal durch den elektronischen Regler erzeugt wird.Alternatively or additionally, it is proposed that in electronic controller, preferably as part of the control room algorithm or in addition to the control algorithm, at least a structure-borne noise spectrum is stored electronically, the proper functioning of the brake system represents (standard spectrum) that the current, in particular by one or more sensors in the Braking system recorded structure-borne noise spectra (current Spectra) can be compared with the standard spectrum, that in the event of deviations from one or more current spectra of the standard spectrum indicating a fault Signal is generated by the electronic controller.
Bei einer Bremsdruckregelanlage, insbesondere für eine Antiblockier- und/oder Antriebsschlupfregelung, die mit mindestens einer durch einen Motor angetriebenen Pumpe ausgerüstet ist, wird im Rahmen eines weiteren Ausführungsbeispiels vorgesehen, daß in einem elektronischen Regler ein oder mehrere Standardvolumen- und/oder Druckpulsationsbilder (Standardbilder), die ein ordnungsgemäßes Funktionieren der Bremsdruckregelan lage repräsentieren, in ihrer Abhängigkeit von der Motor drehzahl gespeichert sind, daß die aktuellen in der Brems druckregelanlage sensierten Volumen- und/oder Druckpulsa tionsbilder (aktuelle Bilder) bei entsprechender Motor drehzahl mit den Standardbildern verglichen werden, daß bei Abweichung eines oder mehrerer aktueller Bilder von dem entsprechenden Standardbild ein eine Störung anzei gendes Signal durch den elektronischen Regler erzeugt wird.In a brake pressure control system, especially for one Anti-lock and / or traction control that with at least one by an engine driven pump is equipped as part of a Another embodiment provided that in one electronic controller one or more standard volume and / or pressure pulsation images (standard images) that proper functioning of the brake pressure control represent location, depending on the engine speed are stored that the current in the brake pressure control system sensed volume and / or pressure pulse tion pictures (current pictures) with appropriate motor speed can be compared with the standard images that if one or more current images deviate from the corresponding standard picture to indicate a malfunction signal generated by the electronic controller becomes.
Anstelle des Arbeitens mit Pulsationsbildern oder zusätz lich zu dieser Methode wird weiterhin vorgeschlagen, daß in einem elektronischen Regler ein oder mehrere Körperschallspektra (Standardspektra), die ein ordnungsge mäßes Funktionieren der Bremsdruckregelanlage repräsen tieren, in ihrer Abhängigkeit von der Motordrehzahl gespeichert sind, daß die aktuellen in der Bremsdruck regelanlage sensierten Körperschallspektra (aktuelle Spektra) bei entsprechender Motordrehzahl mit den Stan dardspektra verglichen werden, daß bei Abweichung eines oder mehrerer aktueller Spektra von dem entsprechenden Standardspektrum ein eine Störung anzeigendes Signal durch den elektronischen Regler erzeugt wird.Instead of working with pulsation pictures or additional For this method, it is also proposed that that one or more in an electronic controller Structure-borne noise spectra (standard spectra), which are a proper Represent the proper functioning of the brake pressure control system animals, depending on the engine speed are stored that the current in the brake pressure control system sensed structure-borne noise spectra (current Spectra) at the appropriate engine speed with the Stan dardspektra be compared that if a or several current spectra from the corresponding one Standard spectrum a signal indicating a disturbance is generated by the electronic controller.
Zur Durchführung der Überwachungsverfahren können im Förderstrom der Pumpe ein oder mehrere die aktuellen Volumen- und/oder Druckpulsationen erfassende Sensoren angeordnet werden.In order to carry out the monitoring procedure, Flow rate of the pump one or more the current Sensors detecting volume and / or pressure pulsations to be ordered.
Außerdem ist es möglich, daß mindestens ein Körperschall erzeugendes Bauteil mit einem das aktuelle Körperschall spektrum erfassenden Sensor ausgerüstet ist.It is also possible that at least one structure-borne noise generating component with a current structure-borne noise spectrum sensing sensor is equipped.
Die das aktuelle Körperschallspektrum erfassenden Sensoren können angebracht sein im Bereich eines Pumpenventils, Pumpenkolbens, eines Teils der Rohrleitungen, des Tandem hauptzylinderregelventils, des Pumpenantriebsmotors. Letzterer kann zur Erfassung der Drehzahl mit einem Dreh zahlsensor versehen sein, der über eine Signalleitung mit dem elektronischen Regler verbunden ist.The sensors that record the current structure-borne noise spectrum can be installed in the area of a pump valve, Pump piston, part of the piping, the tandem master cylinder control valve, the pump drive motor. The latter can be used to record the speed with one turn number sensor be provided via a signal line is connected to the electronic controller.
Weitere Einzelheiten der Erfindung sind der folgenden Beschreibung mehrerer Ausführungsbeispiele zu entnehmen. Diese Ausführungsbeispiele werden anhand einer Figur erläutert.Further details of the invention are as follows Description of several embodiments can be found. These exemplary embodiments are based on a figure explained.
Die Figur zeigt das schematisierte Schaltbild einer Brems druckregelvorrichtung für eine Antiblockier- und/oder Antriebsschlupfregelung.The figure shows the schematic circuit diagram of a brake Pressure control device for an anti-lock and / or Drive slip control.
In der Figur sind nur die für die Erläuterung der Erfin dung notwendigen Teile dargestellt. Weitere Einzelheiten können dem eingangs zitierten Stand der Technik entnommen werden.In the figure are only those for the explanation of the inven necessary parts shown. more details can be taken from the prior art cited at the beginning will.
In der Figur ist mit 1 die Gesamtheit eines Hauptzylinders dargestellt. 2 bezeichnet den Radzylinder der Scheiben bremse 3. Mit 4 ist ein elektronischer Regler bezeichnet. In the figure, 1 shows the entirety of a master cylinder. 2 denotes the wheel cylinder of the disc brake 3 . 4 with an electronic controller is designated.
5 ist der Antriebsmotor für die Pumpe 6. 7 ist der Vorratsbehälter für das Druckmedium der Pumpe 6. Mit 8 ist der Vorratsbehälter für den Hauptzylinder 1 bezeich net. 5 is the drive motor for the pump 6 . 7 is the reservoir for the pressure medium of the pump 6 . With 8 , the reservoir for the master cylinder 1 is designated net.
Wird der Kolben 9 des Hauptzylinders nach links bewegt, baut sich im Druckraum 10 ein hydraulischer Druck auf. Dieser Druck wird durch die Leitungen 11, 12, 13 an den Radzylinder 2 weitergeleitet. Mit 14 ist ein Druckmodula tor, der aus einer Vielzahl von Elektromagnetventilen besteht, bezeichnet. Pars pro toto ist in der Figur das Symbol eines Elektromagnetventils für die Vielzahl der Elektromagnetventile des Druckmodulators eingetragen. Es handelt sich um eine schematisierte Darstellung. Dieser Druckmodulator, siehe den oben genannten Stand der Tech nik, kann insbesondere aus mehreren Stromlos-Offen- und Stromlos-Geschlossen- Ventilen bestehen, die elektromagne tisch schaltbar sind, wobei die Schaltungen aufgrund eines im elektronischen Regler 4 installierten Regelalgo rithmusses erfolgen, siehe auch hierzu den eingangs zitierten Stand der Technik.If the piston 9 of the master cylinder is moved to the left, hydraulic pressure builds up in the pressure chamber 10 . This pressure is passed through the lines 11 , 12 , 13 to the wheel cylinder 2 . With 14 a Druckmodula tor, which consists of a plurality of electromagnetic valves, is designated. Pars pro toto the symbol of a solenoid valve for the large number of solenoid valves of the pressure modulator is entered in the figure. It is a schematic representation. This pressure modulator, see the above-mentioned state of the art technology, can in particular consist of several normally closed and normally closed valves which can be switched electromagne table, the circuits being carried out on the basis of a control algorithm installed in the electronic regulator 4 , see also the prior art cited at the beginning.
Der Druckmodulator ist in der Lage, die Leitungen 12, 13 im Normalbremsmodus zu verbinden. Im Antiblockierregel modus werden die Ventile des Druckmodulators durch elek trische Leitungen, die sie mit dem elektronischen Regler verbinden, betätigt. In der Figur ist rein symbolisch eine dieser Leitungen dargestellt, sie trägt die Bezugs ziffer 15.The pressure modulator is able to connect the lines 12 , 13 in the normal braking mode. In the anti-lock control mode, the valves of the pressure modulator are actuated by electrical lines that connect them to the electronic controller. In the figure, one of these lines is shown purely symbolically, it bears the reference number 15 .
Im Regelmodus öffnet oder schließt der Druckmodulator 14 die Verbindung zwischen den Leitungen 12, 13. Oder er stellt eine Verbindung von der Leitung 13 zur Leitung 16 her, die zum Vorratsbe hälter 7 führt. Die verschiedenen Positionen der Ventil elemente des Modulators können im Radzylinder den gewünschten Druckverlauf erzeugen. Dieser Druckverlauf umfaßt Drucksenkungs-, Druckanstiegs- und Druckkonstant haltephasen. Die Folge und die Länge dieser Phasen wird durch den Regelalgorithmus bestimmt, der im elektronischen Regler gespeichert ist, siehe hierzu den oben zitierten Stand der Technik.In the control mode, the pressure modulator 14 opens or closes the connection between the lines 12 , 13 . Or he makes a connection from line 13 to line 16 , which leads to container 7 Vorratsbe. The various positions of the valve elements of the modulator can generate the desired pressure curve in the wheel cylinder. This pressure curve includes pressure drop, pressure rise and pressure hold phases. The sequence and the length of these phases is determined by the control algorithm, which is stored in the electronic controller, see the prior art cited above.
Im Regelmodus kann die Pumpe 7 über die Druckleitungen 17 und 11 Druckmittel in den Druckraum 10 des Hauptzylin ders fördern. Außerdem kann die Pumpe 7 über die Drucklei tungen 17 und 11 Druckmittel zum Druckmodulator 14 fördern.In control mode, the pump 7 can convey pressure medium into the pressure chamber 10 of the main cylinder via the pressure lines 17 and 11 . In addition, the pump 7 via the Drucklei lines 17 and 11 pressure medium to the pressure modulator 14 promote.
In der Leitung 17, die unter Druck steht, sind die von der Pumpe 7 erzeugten Volumen- und/oder Druckpulsations bilder sensierbar. Mit 18 ist ein Volumen- und/oder Druck pulsationssensor bezeichnet, der diese Bilder aufnimmt, die in Form von elektrischen Signalen über die Signallei tung 19 an den elektronischen Regler weitergeleitet werden.In the line 17 , which is under pressure, the volume and / or pressure pulsation images generated by the pump 7 can be sensed. At 18 , a volume and / or pressure pulsation sensor is referred to, which records these images, which are forwarded in the form of electrical signals via the signal line 19 to the electronic controller.
Selbstverständlich kann der Sensor 18 auch an anderen Teilen der Anlage, insbesondere des Rohrleitungssystems oder im Druckmodulator der Bremsanlage, angeordnet werden, Voraussetzung ist, daß dort von der Pumpe erzeugte Volumen- und/oder Druckpulsationsbilder auftreten. Of course, the sensor 18 can also be arranged on other parts of the system, in particular the piping system or in the pressure modulator of the brake system, provided that volume and / or pressure pulsation images generated by the pump occur there.
Der Motor 5 ist mit einem Körperschallsensor 20 versehen. Die Sensorsignale werden über die Signalleitung 21 an den elektronischen Regler weitergeleitet.The engine 5 is provided with a structure-borne noise sensor 20 . The sensor signals are forwarded to the electronic controller via the signal line 21 .
Der Motor 5 ist weiterhin mit einem Drehzahlsensor 22 ausgerüstet, der über die Signalleitung 23 mit dem elek tronischen Regler verbunden ist.The motor 5 is also equipped with a speed sensor 22 which is connected via the signal line 23 to the electronic controller.
Es folgt die Beschreibung einiger durch die Anlage gemäß der Figur durchführbaren Verfahren:The following is a description of some of the features of the facility Methods feasible in the figure:
Durch den Sensor 18 werden permanent oder in Stichproben Volumen- und/oder Pulsationsbilder aufgenommen. Diese Bilder gelangen, wie dargelegt, in Form von Signalen in den elektronischen Regler. Im elektronischen Regler werden die aktuell gemessenen Volumen- und/oder Druck pulsationsbilder mit einem Volumen- und/oder Druckpulsa tionsstandardbild, das im elektronischen Regler gespei chert ist, verglichen. Bei jeder oder bei bestimmten Abweichungen der aktuellen Bilder vom Standardbild wird ein, eine Störung anzeigendes, Signal durch den elektro nischen Regler erzeugt.The sensor 18 records volume and / or pulsation images permanently or in random samples. As explained, these images arrive in the form of signals in the electronic controller. In the electronic controller, the currently measured volume and / or pressure pulsation images are compared with a volume and / or pressure pulsation standard image, which is stored in the electronic controller. With each or certain deviations of the current images from the standard image, a signal indicating a malfunction is generated by the electronic controller.
In einer weiteren Ausführungsform der Erfindung kann vorgesehen sein, daß im elektronischen Regler 4 im Rahmen des Regelalgorithmus oder zusätzlich zum Regelalgorithmus ein Körperschallspektrum elektronisch gespeichert ist, das ein ordnungsgemäßes Funktionieren der Bremsanlage repräsentiert. Durch den Körperschallsensor 20 wird ein aktuelles Körperschallspektrum des Motors permanent oder stichprobenweise aufgenommen und in Form von elektrischen Signalen an den elektronischen Regler weitergeleitet. Im elektronischen Regler wird das aktuelle, das heißt gemessene, Spektrum mit dem gespeicherten Standardspektrum verglichen. Bei jeder oder bei bestimmten Abweichungen wird ein Signal erzeugt, das die Störung anzeigt.In a further embodiment of the invention, it can be provided that a structure-borne noise spectrum that represents a proper functioning of the brake system is electronically stored in the electronic controller 4 as part of the control algorithm or in addition to the control algorithm. A current structure-borne noise spectrum of the engine is recorded permanently or randomly by the structure-borne noise sensor 20 and is forwarded to the electronic controller in the form of electrical signals. The current, i.e. measured, spectrum is compared in the electronic controller with the stored standard spectrum. With each or certain deviations, a signal is generated which indicates the fault.
In einer weiteren Ausführungsform der Erfindung werden im elektronischen Regler 4 Standardbilder der Volumen- und/oder Druckpulsation in der Abhängigkeit von der Dreh zahl des Motors 5 gespeichert. Sie stellen das Muster dar, das als Vergleichsbasis für die aktuellen Volumen- und/oder Druckpulsationsbilder bei verschiedenen Dreh zahlen des Motors dient. Diese sensierten, aktuellen Bilder werden durch den Körperschallsensor 20 bei verschiedenen Drehzahlen aufgenommen und über die Leitung 21 an den elektronischen Regler 4 weitergeleitet. Bei jeder oder bei bestimmten Abweichungen der aktuellen Bilder von den Standardbildern wird ein, eine Störung anzeigendes, Signal durch den elektronischen Regler erzeugt.In a further embodiment of the invention, standard images of the volume and / or pressure pulsation are stored in the electronic controller 4 as a function of the speed of the motor 5 . They represent the pattern that serves as a basis for comparison of the current volume and / or pressure pulsation images at different engine speeds. These sensed, current images are recorded by the structure-borne noise sensor 20 at different speeds and passed on to the electronic controller 4 via the line 21 . With each or certain deviations of the current images from the standard images, a signal indicating a malfunction is generated by the electronic controller.
Es können im elektronischen Regler ein oder mehrere Körperschallspektra, die ein ordnungsgemäßes Funktionieren der Bremsdruckregelanlage repräsentieren, als Standard spektra in Abhängigkeit von der Motordrehzahl gespeichert sein. Diese Standardspektra werden dann mit den durch den Körperschallsensor 20 bei verschiedenen Drehzahlen des Motors aufgenommenen aktuellen Spektra verglichen. Bei jeder oder bei bestimmten Abweichungen wird das beschriebene, die Störung anzeigende Signal erzeugt.One or more structure-borne noise spectra, which represent the proper functioning of the brake pressure control system, can be stored in the electronic controller as standard spectra depending on the engine speed. These standard spectra are then compared with the current spectra recorded by the structure-borne noise sensor 20 at different engine speeds. With each or with certain deviations the described signal indicating the fault is generated.
Der Körperschallsensor 20, der in der Figur am Motor angebracht ist, kann in jedem anderen Bereich der Anlage, der einen Körperschall erzeugt, untergebracht werden. Voraussetzung ist, daß der Körper schall eine Indikation über das aktuelle Arbeiten der Anlage darstellt.The structure-borne noise sensor 20 , which is attached to the engine in the figure, can be accommodated in any other area of the installation that generates structure-borne noise. The prerequisite is that the body sound is an indication of the current work of the system.
Bevorzugte Teile für die Erfassung eines solchen Körper schalls sind Pumpenventile, Pumpenkolben, Teile der Rohr leitungen, Ventile im Tandemhauptzylinder und weitere Teile des Antriebsmotors.Preferred parts for the detection of such a body Sounds are pump valves, pump pistons, parts of the pipe lines, valves in the tandem master cylinder and others Parts of the drive motor.
Für die Erfassung des Körperschalls der Teile der Pumpe ist der Sensor 24 vorgesehen. The sensor 24 is provided for detecting the structure-borne noise of the parts of the pump.
Liste der EinzelteileList of items
1 Hauptzylinder
2 Radzylinder
3 Scheibenbremse
4 elektronischer Regler
5 Antriebsmotor
6 Pumpe
7 Vorratsbehälter
8 Vorratsbehälter
9 Kolben
10 Druckraum
11 Leitung
12 Leitung
13 Leitung
14 Druckmodulator/Elektromagnetventile
15 Leitung
16 Leitung
17 Leitung
18 Sensor
19 Leitung
20 Sensor
21 Leitung
22 Sensor
23 Leitung
24 Sensor 1 master cylinder
2 wheel cylinders
3 disc brake
4 electronic controllers
5 drive motor
6 pump
7 storage containers
8 storage containers
9 pistons
10 pressure chamber
11 line
12 line
13 line
14 pressure modulator / solenoid valves
15 line
16 line
17 line
18 sensor
19 management
20 sensor
21 line
22 sensor
23 line
24 sensor
Claims (14)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3828933A DE3828933A1 (en) | 1988-08-26 | 1988-08-26 | Method for monitoring a hydraulic system |
EP92102185A EP0487507B1 (en) | 1988-08-26 | 1989-06-29 | Method for monitoring a hydraulic brake system and a brake system for carrying out this method |
KR1019900700822A KR0120932B1 (en) | 1988-08-26 | 1989-06-29 | Hydraulic brake system and monitoring method with abs and tcs |
DE58909473T DE58909473D1 (en) | 1988-08-26 | 1989-06-29 | Method for monitoring a hydraulic brake system and brake system for performing this method. |
EP89907700A EP0396640B1 (en) | 1988-08-26 | 1989-06-29 | Hydraulic braking devices with antilock or traction control device |
DE58909036T DE58909036D1 (en) | 1988-08-26 | 1989-06-29 | HYDRAULIC BRAKE SYSTEMS WITH ANTI-SKID CONTROL OR DRIVE SLIP CONTROL. |
EP19920102184 EP0485367A3 (en) | 1988-08-26 | 1989-06-29 | Method for monitoring a brake system and a brake system for carrying out this method |
PCT/EP1989/000750 WO1990002066A1 (en) | 1988-08-26 | 1989-06-29 | Process for checking the function or operatability of a device or of an installation or components thereof |
JP1507223A JPH03501007A (en) | 1988-08-26 | 1989-06-29 | A method of monitoring the operation or functioning of a device, system or system component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3828933A DE3828933A1 (en) | 1988-08-26 | 1988-08-26 | Method for monitoring a hydraulic system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3828933A1 true DE3828933A1 (en) | 1990-03-01 |
Family
ID=6361617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3828933A Withdrawn DE3828933A1 (en) | 1988-08-26 | 1988-08-26 | Method for monitoring a hydraulic system |
Country Status (1)
Country | Link |
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DE (1) | DE3828933A1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3902131A1 (en) * | 1989-01-25 | 1990-07-26 | Teves Gmbh Alfred | Hydraulic anti-lock brake system for motor vehicles |
DE4014052A1 (en) * | 1990-05-02 | 1991-11-07 | Teves Gmbh Alfred | Electronic pressure regulator for vehicular hydraulic braking system - establishes corrective connection between brake fluid reservoirs serving master cylinder and two-pump fluid pressure modulator |
DE4040919A1 (en) * | 1990-12-20 | 1992-06-25 | Krupp Maschinentechnik | MEASURING DEVICE FOR DETECTING CHARACTERISTIC SIZES WHICH MAKE THE WORKING METHOD OF HYDRAULIC AGGREGATES DETECTABLE |
DE4110494A1 (en) * | 1991-03-30 | 1992-10-01 | Teves Gmbh Alfred | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCKING PROTECTION AND SLIP CONTROL |
DE4232614A1 (en) * | 1992-09-29 | 1994-03-31 | Teves Gmbh Alfred | Anti-lock hydraulic brake system |
DE10002452A1 (en) * | 2000-01-21 | 2001-07-26 | Bayerische Motoren Werke Ag | Hydraulic fluid leakage detection for swivel motor used in vehicle service station, involves comparing pressure difference between two hydraulic fluid supply lines after cut-off of fluid supply, with predefined threshold |
FR2825961A1 (en) * | 2001-06-15 | 2002-12-20 | Bosch Gmbh Robert | SYSTEM AND METHOD FOR THE RECOGNITION OF A DEFECT DURING INTERVENTION ON THE DRIVING BEHAVIOR OF A MOTOR VEHICLE |
DE10312545A1 (en) * | 2003-03-21 | 2004-10-07 | Audi Ag | Operating motor vehicle braking system involves controlling at least one arrangement for regulating braking pressure at one or more wheels depending on detected braking pressure profile |
WO2010122132A1 (en) * | 2009-04-23 | 2010-10-28 | Continental Teves Ag & Co. Ohg | Method for calibrating a pump motor in a pressure control system |
WO2016126328A1 (en) * | 2015-02-05 | 2016-08-11 | Parker-Hannifin Corporation | Acoustic/vibration prediction of hydraulic pumps |
WO2017033015A1 (en) * | 2015-08-25 | 2017-03-02 | Artemis Intelligent Power Limited | The measurement and use of hydraulic stiffness properties of hydraulic apparatus |
DE102007034113B4 (en) | 2007-07-21 | 2018-07-19 | Continental Teves Ag & Co. Ohg | Method for calibrating a hydraulic pump |
CN112267996A (en) * | 2020-11-23 | 2021-01-26 | 中国人民解放军海军工程大学 | Flow pulsation testing device of hydraulic pump |
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DE2823960A1 (en) * | 1978-06-01 | 1979-12-06 | Deutsche Forsch Luft Raumfahrt | Electrohydraulic adjusting drive - has ram supplied via quick-acting valves controlled by computer pulses |
DE3227265A1 (en) * | 1982-07-21 | 1984-01-26 | Alfred Teves Gmbh, 6000 Frankfurt | Monitoring device for the energy supply to a plant actuated by pressure medium |
DE2342307C2 (en) * | 1973-08-22 | 1984-12-20 | Robert Bosch Gmbh, 7000 Stuttgart | Arrangement for checking an anti-lock control system for vehicle brake systems |
DE3731603A1 (en) * | 1986-11-06 | 1988-05-19 | Teves Gmbh Alfred | BRAKE SYSTEM |
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DE2342307C2 (en) * | 1973-08-22 | 1984-12-20 | Robert Bosch Gmbh, 7000 Stuttgart | Arrangement for checking an anti-lock control system for vehicle brake systems |
DE2823960A1 (en) * | 1978-06-01 | 1979-12-06 | Deutsche Forsch Luft Raumfahrt | Electrohydraulic adjusting drive - has ram supplied via quick-acting valves controlled by computer pulses |
DE3227265A1 (en) * | 1982-07-21 | 1984-01-26 | Alfred Teves Gmbh, 6000 Frankfurt | Monitoring device for the energy supply to a plant actuated by pressure medium |
DE3731603A1 (en) * | 1986-11-06 | 1988-05-19 | Teves Gmbh Alfred | BRAKE SYSTEM |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3902131A1 (en) * | 1989-01-25 | 1990-07-26 | Teves Gmbh Alfred | Hydraulic anti-lock brake system for motor vehicles |
DE4014052A1 (en) * | 1990-05-02 | 1991-11-07 | Teves Gmbh Alfred | Electronic pressure regulator for vehicular hydraulic braking system - establishes corrective connection between brake fluid reservoirs serving master cylinder and two-pump fluid pressure modulator |
DE4040919A1 (en) * | 1990-12-20 | 1992-06-25 | Krupp Maschinentechnik | MEASURING DEVICE FOR DETECTING CHARACTERISTIC SIZES WHICH MAKE THE WORKING METHOD OF HYDRAULIC AGGREGATES DETECTABLE |
US5168753A (en) * | 1990-12-20 | 1992-12-08 | Krupp Maschinentechnik Gesellschaft Mit Beschrankter Haftung | Measuring device for detecting parameters charterizing the operating behavior of hydraulic assembles |
DE4110494A1 (en) * | 1991-03-30 | 1992-10-01 | Teves Gmbh Alfred | HYDRAULIC BRAKE SYSTEM WITH ANTI-BLOCKING PROTECTION AND SLIP CONTROL |
DE4232614A1 (en) * | 1992-09-29 | 1994-03-31 | Teves Gmbh Alfred | Anti-lock hydraulic brake system |
DE10002452B4 (en) * | 2000-01-21 | 2006-06-29 | Bayerische Motoren Werke Ag | Method for checking the function and tightness of a hydraulic swing motor |
DE10002452A1 (en) * | 2000-01-21 | 2001-07-26 | Bayerische Motoren Werke Ag | Hydraulic fluid leakage detection for swivel motor used in vehicle service station, involves comparing pressure difference between two hydraulic fluid supply lines after cut-off of fluid supply, with predefined threshold |
FR2825961A1 (en) * | 2001-06-15 | 2002-12-20 | Bosch Gmbh Robert | SYSTEM AND METHOD FOR THE RECOGNITION OF A DEFECT DURING INTERVENTION ON THE DRIVING BEHAVIOR OF A MOTOR VEHICLE |
DE10312545A1 (en) * | 2003-03-21 | 2004-10-07 | Audi Ag | Operating motor vehicle braking system involves controlling at least one arrangement for regulating braking pressure at one or more wheels depending on detected braking pressure profile |
DE10312545B4 (en) * | 2003-03-21 | 2006-05-24 | Audi Ag | Method for operating the brake system of a motor vehicle |
DE102007034113B4 (en) | 2007-07-21 | 2018-07-19 | Continental Teves Ag & Co. Ohg | Method for calibrating a hydraulic pump |
WO2010122132A1 (en) * | 2009-04-23 | 2010-10-28 | Continental Teves Ag & Co. Ohg | Method for calibrating a pump motor in a pressure control system |
WO2016126328A1 (en) * | 2015-02-05 | 2016-08-11 | Parker-Hannifin Corporation | Acoustic/vibration prediction of hydraulic pumps |
WO2017033015A1 (en) * | 2015-08-25 | 2017-03-02 | Artemis Intelligent Power Limited | The measurement and use of hydraulic stiffness properties of hydraulic apparatus |
US11078934B2 (en) | 2015-08-25 | 2021-08-03 | Artemis Intelligent Power Limited | Measurement and use of hydraulic stiffness properties of hydraulic apparatus |
CN112267996A (en) * | 2020-11-23 | 2021-01-26 | 中国人民解放军海军工程大学 | Flow pulsation testing device of hydraulic pump |
CN112267996B (en) * | 2020-11-23 | 2022-03-29 | 中国人民解放军海军工程大学 | Flow pulsation testing device of hydraulic pump |
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