DE10221456B4 - Method for calibrating the current / opening characteristic of an analog hydraulic valve - Google Patents
Method for calibrating the current / opening characteristic of an analog hydraulic valve Download PDFInfo
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- DE10221456B4 DE10221456B4 DE10221456A DE10221456A DE10221456B4 DE 10221456 B4 DE10221456 B4 DE 10221456B4 DE 10221456 A DE10221456 A DE 10221456A DE 10221456 A DE10221456 A DE 10221456A DE 10221456 B4 DE10221456 B4 DE 10221456B4
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 3
- 238000002955 isolation Methods 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 abstract 1
- SVIFGEVWHFNGCZ-UHFFFAOYSA-N n-[2-[di(propan-2-yl)amino]ethyl]-2-(2-oxopyrrolidin-1-yl)acetamide;hydron;chloride Chemical compound Cl.CC(C)N(C(C)C)CCNC(=O)CN1CCCC1=O SVIFGEVWHFNGCZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000004044 response Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- B60T8/34—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
- B60T8/42—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 having expanding chambers for controlling pressure, i.e. closed systems
- B60T8/4275—Pump-back systems
-
- 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
- B60T8/36—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 including a pilot valve responding to an electromagnetic force
-
- 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
- B60T8/36—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 including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/3655—Continuously controlled electromagnetic valves
-
- 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
- B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
- B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
- B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
- B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
- B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
Verfahren zum Kalibrieren der Strom/Öffnungs-Charakteristik eines analogen oder analogisierten Hydraulikventils eines geregelten Kraftfahrzeug-Bremsen- oder Regelungssystems, wie eines ABS-, ASR-, ESP-Systems etc., bei dem mit Hilfe eines Bremsdruckgebers erzeugter Bremsdruck über ein Trennventil und über ein Einlassventil zu einer Radbremse gelangt und bei dem in einem geschlossenen System Bremsdruck über ein Auslassventil aus der Radbremse in einen Niederdruckspeicher geleitet und über eine Rückförderpumpe in den Bremskreis zurückgefördert wird, wobei als Trennventil und als Einlassventil die analogisierten Hydraulikventile verwendet werden, dadurch gekennzeichnet, – dass in einem Diagnose- oder Kalibriervorgang mit einer Prüfstange, die an den Bremsdruckgeber angelegt wird, Bremsdruck in dem Bremsensystem und einer Radbremse hervorgerufen wird, – dass durch Öffnen des Auslassventils Druckmittel aus der Radbremse in den Niederdruckspeicher abgeleitet und der Druck im Bremsensystem abgebaut wird, – dass nach dem Schließen des Einlassventils das Druckmittel durch Ansteuern der Pumpe zurückgefördert wird, – dass der von der...Method for calibrating the current / opening characteristic of an analog or analogized hydraulic valve of a regulated motor vehicle brake or control system, such as an ABS, ASR, ESP system etc., in the case of the brake pressure generated with the aid of a brake pressure sensor via a isolating valve and an inlet valve arrives at a wheel brake and in which, in a closed system, brake pressure is passed from the wheel brake to a low-pressure accumulator via an outlet valve and is fed back into the brake circuit via a return pump, the analogized hydraulic valves being used as isolating valve and inlet valve, characterized in that that in a diagnostic or calibration process with a test rod that is applied to the brake pressure sensor, brake pressure is generated in the brake system and a wheel brake, - that pressure medium is discharged from the wheel brake into the low-pressure accumulator by opening the exhaust valve and the pressure in the B remen system is dismantled, - that after closing the inlet valve, the pressure medium is returned by activating the pump, - that the ...
Description
Die Erfindung bezieht sich auf ein Verfahren zum Kalibrieren der Strom/Öffnungs-Charakteristik eines analogen oder analogisierten Hydraulikventils eines geregelten Kraftfahrzeug-Bremsen- oder Regelungssystems, wie eines ABS-, ASR-, ESP-Systems etc., bei dem mit Hilfe ein Bremsdruckgebers erzeugter Bremsdruck über ein Trennventil und über ein Einlassventil zu einer Radbremse gelangt und bei dem in einem geschlossenen System Bremsdruck über ein Auslassventil aus der Radbremse in einen Niederdruckspeicher geleitet und über eine Rückförderpumpe in den Bremskreis zurückgefördert wird, wobei als Trennventil und als Einlassventil die analogisierten Hydraulikventile verwendet werden.The invention relates to a method for calibrating the current / open characteristic of an analog or analog hydraulic valve of a controlled vehicle brake or control system, such as an ABS, ASR, ESP system, etc., in which generated by means of a brake pressure generator Brake pressure passes through a release valve and an intake valve to a wheel brake and passed in a closed system brake pressure via an exhaust valve from the wheel in a low-pressure accumulator and fed back via a return pump in the brake circuit, using as an isolation valve and as an inlet valve, the analogized hydraulic valves become.
In der Weiterentwicklung von ABS/ESP-Systemen werden vermehrt analogisierte Ventile (AD-Ventile) zur Regelung der Hydraulikflüssigkeit eingesetzt. Der Strom bei dem das AD-Ventil öffnet, ist jedoch stark von der am Ventil anliegenden Druckdifferenz abhängig. Um die AD-Ventile regeln zu können, ist es notwendig, diesen Stromwert, der hier weiterhin als ”Öffnungspunkt” bezeichnet wird, zu kennen.In the further development of ABS / ESP systems, more and more analogized valves (AD valves) are used to control the hydraulic fluid. However, the current at which the AD valve opens is highly dependent on the pressure difference across the valve. In order to be able to control the AD valves, it is necessary to know this current value, which is still referred to here as the "opening point".
Der Öffnungspunkt ist weiterhin von Fertigungstoleranzen und vom Verschleiß des Ventils und anderer Bauteile des Bremsensystems abhänig. Daher ist bei einem Reglertausch eine Anpassung der Hydraulik an den Regler notwendig. Die Öffnungspunkte müssen in dem Regler abgelegt werden.The opening point is still dependent on manufacturing tolerances and wear of the valve and other components of the brake system. Therefore, when changing the regulator it is necessary to adapt the hydraulics to the regulator. The opening points must be stored in the controller.
Aus der
Der Erfindung liegt die Aufgabe zu Grunde, ein Verfahren zum Kalibrieren von Hydraulikventilen (AD-Ventilen) der eingangs genannten Art zu entwickeln, das zuverlässig arbeitet, zu Ergebnissen mit hoher, in jedem Fall ausreichender Genauigkeit führt und das sich mit vergleichsweise geringem Zeitaufwand durchführen lässt.The invention is based on the object to develop a method for calibrating hydraulic valves (AD valves) of the type mentioned, which works reliably, leads to results with high, in each case sufficient accuracy and can be performed with relatively little time ,
Es hat sich herausgestellt, dass diese Aufgabe durch das im Anspruch 1 beschriebene Verfahren gelöst wird, dessen Besonderheit darin besteht,
- – dass in einem Diagnose- oder Kalibriervorgang mit einer Prüfstange, die an den Bremsdruckgeber angelegt wird, Bremsdruck in dem Bremsensystem und einer Radbremse hervorgerufen wird,
- – dass durch Öffnen des Auslassventils Druckmittel aus der Radbremse in den Niederdruckspeicher abgeleitet und der Druck im Bremsensystem abgebaut wird,
- – dass nach dem Schließen des Einlassventils das Druckmittel durch Ansteuern der Pumpe zurückgefördert wird,
- – dass der von der Ansteuerung der Pumpe abhängige Druck im Bremsensystem oder die Druckdifferenz über dem zu kalibrierenden Hydraulikventil gemessen oder geschätzt wird,
- – dass das zu kalibrierende Hydraulikventil durch rampenförmige oder stufenförmige Änderung des Ventilstromes umgeschaltet wird, und
- – dass der zu Beginn des Umschaltvorgangs, d. h. zu Beginn des Öffnens oder Schließens des Ventils fließende Ventilerregerstrom ermittelt.
- - That in a diagnostic or calibration process with a test rod, which is applied to the brake pressure transducer, brake pressure in the brake system and a wheel brake is caused,
- - That by opening the exhaust valve pressure fluid from the wheel brake in the low pressure accumulator derived and the pressure in the brake system is reduced,
- - That after closing the inlet valve, the pressure medium is fed back by driving the pump,
- That the pressure in the brake system dependent on the control of the pump or the pressure difference across the hydraulic valve to be calibrated are measured or estimated,
- - That the hydraulic valve to be calibrated is switched by ramp-shaped or stepped change of the valve current, and
- - That determines the current at the beginning of the switching, ie at the beginning of opening or closing of the valve valve excitation current.
Nach einem vorteilhaften Ausführungsbeispiel der Erfindung ist das zu kalibrierenden Ventil ein stromlos offenes Hydraulikventil, wobei der beim Abbau des Ventilerregerstroms zu Beginn des Ventilöffnens fließende Strom ermittelt wird.According to an advantageous embodiment of the invention, the valve to be calibrated is a normally open hydraulic valve, wherein the current flowing in the degradation of the valve exciter current at the beginning of the valve opening current is determined.
Weiterhin hat es sich als zweckmäßig erwiesen, den Ventilerregerstrom, der zu Beginn des Ventilöffnens fließt, durch Beobachten des Druckverlaufs im Bremsdruckgeber zu detektieren. Ein Drucksensor im Hauptzylinder ist hierfür von Nutzen.Furthermore, it has proven to be expedient to detect the valve exciter current flowing at the beginning of valve opening by observing the pressure profile in the brake pressure generator. A pressure sensor in the master cylinder is useful for this purpose.
Zur Bestimmung der Ventilcharakteristik des zu kalibrierenden Ventils werden nach einer weiteren Ausführungsart der Erfindung systematisch Differenzdrücke bestimmter Höhe über dem geschlossenen Ventile eingestellt, und es wird jeweils der Ventilöffnungsstrom in Abhängigkeit von der Druckdifferenz ermittelt und in der Reglerelektronik gespeichert.In order to determine the valve characteristic of the valve to be calibrated, according to a further embodiment of the invention, differential pressures of specific height are systematically set above the closed valves, and the valve opening current is determined as a function of the pressure difference and stored in the controller electronics.
Schließlich ist noch möglich, Differenzdrücke verschiedener Höhe über dem zu kalibrierenden Ventil durch entsprechende Ansteuerung der Rückförderpumpe einzustellen und mit Hilfe des im Bremsdruckgeber installierten Drucksensors zu messen. In anderen Fällen genügt es, die Höhe des durch die Pumpenansteuerung hervorgerufenen Druckes in Abhängigkeit von einer vorgegebenen Pumpenansteuerungs-Vorgabe abzuschätzen.Finally, it is still possible to set differential pressures of different height above the valve to be calibrated by appropriate control of the return pump and to measure with the help of installed in the brake pressure sensor pressure sensor. In other cases, it is sufficient to estimate the amount of pressure caused by the pump control in response to a given pump drive specification.
Weitere Vorteile und Einzelheiten gehen aus der folgenden Beschreibung von Ausführungsbeispielen der Erfindung anhand der beigefügten Abbildungen hervor. Es zeigen:Further advantages and details will become apparent from the following description of embodiments of the invention with reference to the accompanying drawings. Show it:
In
Dargestellt ist ein Bremsdruckgeber
Für das erfindungsgemäße Verfahren sind nur die analogisierten Hydraulikventile (AD-Ventile), also die Einlassventile (EV)
Mit der Prüfstange wird (Schritt 1) ein bestimmter Systemdruck aufgebaut und dadurch ein entsprechendes Druckmittelvolumen in die Radbremse verschoben. Nach dem Abbau des Druckes durch Öffnen des Auslassventils AV (Schritt 2) und Abfluss des Druckmittels in den Niederdruckspeicher NDS sinkt der Druck im Hauptzylinder HZ und am Sensor
Nun wird das Einlassventil EV (Schritt 5) mit einer fallenden Stromrampe oder Treppenfunktion bestromt. Bei voller Bestromung ist das Ventil EV geschlossen. Bei einem der Druckdifferenz über dem Ventil entsprechenden Wert des Ventilerregerstromes beginnt das Ventil zu öffnen. Der damit verbundene Druckausgleich wird durch den Drucksensor
Der gespeicherte Stromwert ist der zur Druckdifferenz zugehörige Öffnungspunkt. Die Ansteuerung des AD-Ventils kann mittels Stromrampe, Treppenfunktion oder einer veränderbaren PWM realisiert werden. Da mittels der Prüfstange verschiedene Drücke vorgegeben werden können und somit verschiedene Volumina in das System eingebracht werden können, ist es auf sehr einfache Weise möglich, den Öffnungspunkt für verschiedene Differenzdrücke zu bestimmen.The stored current value is the opening point associated with the pressure difference. The control of the AD valve can be realized by means of current ramp, staircase function or a variable PWM. Since different pressures can be predetermined by means of the test rod and thus different volumes can be introduced into the system, it is possible in a very simple way to determine the opening point for different differential pressures.
Es handelt sich wiederum um ein stromlos offenes analogisiertes Hydraulikventil. Im Unterschied zum Verfahrensablauf nach
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE10221456A DE10221456B4 (en) | 2001-07-11 | 2002-05-15 | Method for calibrating the current / opening characteristic of an analog hydraulic valve |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10133079.0 | 2001-07-11 | ||
DE10133079 | 2001-07-11 | ||
DE10219309.6 | 2002-04-30 | ||
DE10219309 | 2002-04-30 | ||
DE10221456A DE10221456B4 (en) | 2001-07-11 | 2002-05-15 | Method for calibrating the current / opening characteristic of an analog hydraulic valve |
Publications (2)
Publication Number | Publication Date |
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DE10221456A1 DE10221456A1 (en) | 2003-02-06 |
DE10221456B4 true DE10221456B4 (en) | 2011-08-11 |
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DE10221456A Expired - Fee Related DE10221456B4 (en) | 2001-07-11 | 2002-05-15 | Method for calibrating the current / opening characteristic of an analog hydraulic valve |
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Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112004002379D2 (en) | 2003-12-08 | 2006-11-02 | Continental Teves Ag & Co Ohg | Method for calibrating analogously controlled electrically actuatable hydraulic valves |
DE102005014097A1 (en) * | 2004-09-30 | 2006-04-06 | Continental Teves Ag & Co. Ohg | Method for calibrating the current / opening characteristic of an electrically controllable, analogously regulating hydraulic valve |
JP4552720B2 (en) * | 2005-03-25 | 2010-09-29 | 株式会社アドヴィックス | Brake hydraulic pressure control device for vehicles |
DE102005049300A1 (en) | 2005-10-12 | 2007-04-26 | Continental Teves Ag & Co. Ohg | Method for determining the wheel pressure in an electronically controllable motor vehicle brake control system |
DE102005051436A1 (en) * | 2005-10-27 | 2007-05-03 | Continental Teves Ag & Co. Ohg | Calibration values generating method for e.g. antilock braking system, involves determining braking effect, that is caused due to valve opening signal, based on antilock braking system-wheel rotational sensors provided within motor vehicle |
JP4631660B2 (en) * | 2005-11-11 | 2011-02-16 | トヨタ自動車株式会社 | Brake control device |
DE102007015265B4 (en) * | 2006-03-28 | 2021-01-07 | Continental Teves Ag & Co. Ohg | Method for determining the opening current characteristics of analog controlled valves |
DE102006057501A1 (en) * | 2006-05-19 | 2007-11-22 | Continental Teves Ag & Co. Ohg | Calibration of hydraulic inlet valve under analog control, closes inlet valve, builds up pressure in brake with pressure sensor and determines flow during inlet valve opening |
DE102007019732A1 (en) * | 2006-06-06 | 2007-12-27 | Continental Teves Ag & Co. Ohg | Calibration of pressure versus opening current characteristics of hydraulic block valves operated under analog control in vehicle braking systems, is inferred from vehicle deceleration |
DE102006055767B4 (en) * | 2006-06-13 | 2015-10-01 | Continental Teves Ag & Co. Ohg | Method for calibrating analog controlled hydraulic valves |
DE102006040127A1 (en) * | 2006-08-26 | 2008-03-06 | Continental Teves Ag & Co. Ohg | Electronic motor vehicle brake control system`s hydraulic pump calibrating method, involves predetermining generator voltage, and determining correction values, while reaction of engine is evaluated based on controlled electrical signal |
DE102007008908A1 (en) * | 2007-02-23 | 2008-08-28 | Continental Teves Ag & Co. Ohg | Intake valve chain controlling method for use during anti-blocking brake system regulation process, involves controlling separating valve in such manner that increase in fluid pressure occurs in wheel brake unit with smaller gradients |
DE102007010514A1 (en) * | 2007-03-05 | 2008-09-11 | Continental Teves & Co. Ohg | Method for calibrating analogized valves in a pressure regulator |
DE102008013043B4 (en) | 2007-03-09 | 2020-08-20 | Continental Teves Ag & Co. Ohg | Method for controlling valves in a brake system |
DE102008040534B4 (en) * | 2008-07-18 | 2021-01-07 | Robert Bosch Gmbh | Method and device for determining and balancing the operating point of valves in a hydraulic system |
DE102010032929A1 (en) * | 2010-07-30 | 2012-02-02 | Lucas Automotive Gmbh | Method for operating an electrically controllable brake system |
DE102011075295A1 (en) * | 2011-05-05 | 2012-11-08 | Continental Teves Ag & Co. Ohg | Method for calibrating analog regulating hydraulic valve in hydraulic pressure control circuit, involves supplying pressure relief valve with current ramp, to carry out sensing of incipient change in pressure by pressure sensor |
DE102013203599B4 (en) | 2012-03-06 | 2023-09-28 | Continental Automotive Technologies GmbH | Method for calibrating analogue controlled hydraulic valves and a brake system |
DE102019212968A1 (en) * | 2019-08-29 | 2021-03-04 | Continental Teves Ag & Co. Ohg | Method for determining a hydraulic pressure in a brake system and brake system |
CN114876791B (en) * | 2022-06-02 | 2024-12-13 | 河南航天液压气动技术有限公司 | Intelligent flow calibration gear pump |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19850386A1 (en) * | 1998-05-12 | 1999-11-18 | Continental Teves Ag & Co Ohg | Hydraulic brake system for regulated and gentle braking |
DE10104497A1 (en) * | 2000-02-02 | 2002-08-08 | Continental Teves Ag & Co Ohg | Method for controlling pressure in wheel brakes of electronically regulated braking system, involves using valve current magnitude at time of valve changeover to compute required valve current |
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2002
- 2002-05-15 DE DE10221456A patent/DE10221456B4/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19850386A1 (en) * | 1998-05-12 | 1999-11-18 | Continental Teves Ag & Co Ohg | Hydraulic brake system for regulated and gentle braking |
DE10104497A1 (en) * | 2000-02-02 | 2002-08-08 | Continental Teves Ag & Co Ohg | Method for controlling pressure in wheel brakes of electronically regulated braking system, involves using valve current magnitude at time of valve changeover to compute required valve current |
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