DE10221456A1 - Calibrating current/opening characteristic of analogue hydraulic valve for regulated motor vehicle brake system, involves diagnostic or calibration process in which test rod is applied to brake pressure transducer and valve changeover - Google Patents
Calibrating current/opening characteristic of analogue hydraulic valve for regulated motor vehicle brake system, involves diagnostic or calibration process in which test rod is applied to brake pressure transducer and valve changeoverInfo
- Publication number
- DE10221456A1 DE10221456A1 DE10221456A DE10221456A DE10221456A1 DE 10221456 A1 DE10221456 A1 DE 10221456A1 DE 10221456 A DE10221456 A DE 10221456A DE 10221456 A DE10221456 A DE 10221456A DE 10221456 A1 DE10221456 A1 DE 10221456A1
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- valve
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- brake
- opening
- pump
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 5
- 230000001419 dependent effect Effects 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000004913 activation Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
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 calibration 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 Systems etc., in which generated with the help of a brake pressure sensor Brake pressure via an isolating valve and an inlet valve too a wheel brake and in a closed System brake pressure via an outlet valve from the wheel brake in a low-pressure accumulator and a return pump is conveyed back into the brake circuit, using as a separating valve and the analogized hydraulic valves as the inlet valve be used.
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. The further development of ABS / ESP systems is increasing Analogized valves (AD valves) for controlling the Hydraulic fluid used. The current at which the AD valve opens, is, however, strongly dependent on the pressure difference across the valve dependent. In order to be able to regulate the AD valves, it is necessary this current value, which continues to be the "opening point" is known to know.
Der Öffnungspunkt ist weiterhin von Fertigungstoleranzen und vom Verschleiß des Ventils und anderer Bauteile des Bremsensystems abhängig. 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 of manufacturing tolerances and from the wear of the valve and other components of the Brake system dependent. Therefore, an adjustment is necessary when replacing a controller the hydraulics to the controller. The opening points must be stored in the controller.
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 of a method for Calibration of hydraulic valves (AD valves) of the input to develop the type mentioned that works reliably Results with high, in any case sufficient accuracy leads and that with comparatively little expenditure of time can be carried out.
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 brake pressure is generated in the brake system and a wheel brake in a diagnostic or calibration process with a test rod that is applied to the brake pressure transmitter,
- - that pressure medium is discharged from the wheel brake into the low-pressure accumulator and the pressure in the brake system is reduced by opening the outlet valve,
- that after the inlet valve has been closed, the pressure medium is returned by activating the pump,
- - that the pressure in the brake system or the pressure difference across the hydraulic valve to be calibrated, which is dependent on the control of the pump, is measured or estimated,
- - That the hydraulic valve to be calibrated is switched over by ramp-shaped or step-like change in the valve current, and
- - That the valve excitation current flowing at the beginning of the switching process, ie at the beginning of the opening or closing of the valve, is determined.
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 normally open Hydraulic valve, the when the valve excitation current at the beginning of the Valve opening flowing 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 useful Valve excitation current flowing at the start of valve opening Observe the pressure curve in the brake pressure sensor to detect. On Pressure sensor in the master cylinder is useful for this.
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. To determine the valve characteristics of the calibrated Valve are according to a further embodiment of the invention systematic differential pressures of a certain height above the closed valves set, and it becomes the Valve opening current determined depending on 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 differentiate differential pressures Height above the valve to be calibrated by appropriate Control of the return pump set and with the help of Brake pressure sensor installed to measure pressure. In in other cases, it is sufficient to adjust the level of the pump control caused pressure depending on a predetermined Estimate pump control 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 follow from the following Description of exemplary embodiments of the invention using the attached pictures. Show it:
Fig. 1 in schematisch vereinfachter Darstellung die wichtigsten hydraulischen und mechanischen Komponenten eines geregelten Bremsensystems, Fig. 1 in a schematically simplified representation of the main hydraulic and mechanical components of a controlled brake system,
Fig. 2 tabellarisch die wichtigsten Schritte eines Verfahrens zur Kalibrierung eines Einlassventils und Fig. 2 tabulates the main steps of a method for calibrating an intake valve and
Fig. 3 in gleicher Darstellungsweise wie Fig. 2 die wesentlichen Schritte zur Kalibrierung eines Trennventils. Fig. 3 in the same representation as Fig. 2, the essential steps for the calibration of a isolation valve.
In Fig. 1 sind die Komponenten eines Bremsensystems wiedergegeben, das in Verbindung mit einem nicht dargestellten elektronischen Regler zur Bremsen- und Fahrstabilitätsregelung (ABS, ASR, ESP etc.) geeignet ist. In Fig. 1, the components of a brake system are shown, which is suitable in conjunction with an electronic controller, not shown, for brake and driving stability control (ABS, ASR, ESP etc.).
Dargestellt ist ein Bremsdruckgeber 14, der im vorliegenden Beispiel aus einem pedalbetätigten Tandem-Hauptzylinder (HZ) mit vorgeschaltetem Servo-Aggregat besteht. Es handelt sich um ein zweikreisiges Bremssystem. Beide Bremskreise sind im Prinzip identisch aufgebaut und über Trennventile (TV) 1, 2 an den Hauptzylinder angeschlossen. Zur Bremsdruckregelung sind jedem Rad bzw. jeder Radbremse in bekannter Weise ein Einlassventil (EV) 3-6 und ein Auslassventil (AV) 9-12 zugeordnet. Die Trennventile 1, 2 und die Einlassventile 3-6 sind als stromlos offene AD-Ventile ausgebildet. Jeder hydraulische Kreis enthält einen Niederdruckspeicher NDS zur Aufnahme des im Druckabbau- Modus über die stromlos geschlossenen 2/2-Wegeventile (AV) abgeleiteten Druckmittels sowie des weiteren eine Rückförderpumpe 16. Ein elektrisch steuerbares, stromlos geschlossenes 2/2- Wegeventil 7, 8 wird im ASR-Modus zumindest zeitweise auf Durchlass umgeschaltet. Shown is a brake pressure transmitter 14 , which in the present example consists of a pedal-operated tandem master cylinder (HZ) with an upstream servo unit. It is a two-circuit braking system. In principle, both brake circuits are constructed identically and connected to the master cylinder via isolating valves (TV) 1 , 2 . An inlet valve (EV) 3-6 and an outlet valve (AV) 9-12 are assigned to each wheel or each wheel brake in a known manner for brake pressure control. The isolating valves 1 , 2 and the inlet valves 3-6 are designed as de-energized open AD valves. Each hydraulic circuit contains a low pressure accumulator NDS for receiving the pressure medium derived in the pressure reduction mode via the normally closed 2/2-way valves (AV) and also a return pump 16 . An electrically controllable, normally closed 2/2-way valve 7 , 8 is at least temporarily switched to passage in the ASR mode.
Für das erfindungsgemäße Verfahren sind nur die analogisierten Hydraulikventile (AD-Ventile), also die Einlassventile (EV) 3-6 und die Trennventile (TV) 1, 2, von Belang. Durch das erfindungsgemäße Verfahren wird es möglich, diese AD-Ventile auf einfache Weise zu kalibrieren. Only the analogized hydraulic valves (AD valves), that is to say the inlet valves (EV) 3-6 and the separating valves (TV) 1 , 2 , are relevant for the method according to the invention. The method according to the invention makes it possible to calibrate these AD valves in a simple manner.
Fig. 2 zeigt die erforderlichen Schritte zum Kalibrieren eines Einlassventils. Erfindungsgemäß wird zunächst mit Hilfe einer sogenannten Prüfstange hydraulischer Druck im Bremsensystem hervorgerufen. Durch die Prüfstange legt das Bremspedal einen festen Weg zurück und ruft im Hauptzylinder einen bestimmten Druck hervor. Dieser Systemdruck kann mit einem im Bremsdruckgeber, hier im Hauptzylinder HZ, installierten Drucksensor 13gemessen werden. In modernen Bremsanlagen, z. B. in Bremsanlagen mit ESP-Funktion, sind solche Drucksensoren ohnehin bereits vorhanden. Figure 2 shows the steps required to calibrate an intake valve. According to the invention, hydraulic pressure is first generated in the brake system with the aid of a so-called test rod. The brake pedal travels a fixed path through the test rod and creates a certain pressure in the master cylinder. This system pressure can be measured with a pressure sensor 13 installed in the brake pressure transmitter, here in the master cylinder HZ. In modern braking systems, e.g. B. in brake systems with ESP function, such pressure sensors are already available anyway.
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 13 auf nahezu 0 bar. Durch Einschalten der Hydraulikpumpe (HP) 16 und Rückförderung des Druckmittels in den Bremskreis (Schritt 3) wird ein Druckanstieg an der Einlassseite des Einlassventils EV erreicht, wobei durch Bemessung der Pumpen-Ansteuerungszeit vorgegebene Druck-Sollwerte in Abhängigkeit von der Pumpenansteuerung einstellbar sind. Auf diese Weise lassen sich mehrere Stufen oder Messpunkte zur Erfassung einer Ventilcharakteristik gewinnen, ohne dass die Pedalbetätigung geändert werden müsste; die durch die Prüfstange hervorgerufenen Pedalverschiebung wird beibehalten. Für den Kälibrierungsvorgang oder Kalibrierungsaufwand ist dies ein entscheidender Vorteil. Der durch die Pumpenansteuerung eingestellte Druck wird durch den Drucksensor 13 gemessen (Schritt 4). An der Bremsenseite des geschlossenen Einlassventils herrscht der Druck 0; die Druckdifferenz über dem Einlassventil EV ist somit bekannt. A certain system pressure is built up with the test rod (step 1 ) and a corresponding pressure medium volume is thereby shifted into the wheel brake. After the pressure has been reduced by opening the outlet valve AV (step 2 ) and the pressure medium has drained into the low-pressure accumulator NDS, the pressure in the master cylinder HZ and on the sensor 13 drops to almost 0 bar. By switching on the hydraulic pump (HP) 16 and returning the pressure medium to the brake circuit (step 3 ), a pressure increase on the inlet side of the inlet valve EV is achieved, whereby predetermined pressure setpoints can be set as a function of the pump control by measuring the pump activation time. In this way, several stages or measuring points for acquiring a valve characteristic can be obtained without having to change the pedal actuation; the pedal displacement caused by the test rod is maintained. This is a decisive advantage for the calibration process or calibration effort. The pressure set by the pump control is measured by the pressure sensor 13 (step 4 ). The pressure on the brake side of the closed intake valve is 0; the pressure difference across the inlet valve EV is thus known.
Nun wird das Einlassventil EV (Schritt S) 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 13 im HZ ermittelt. Für verschiedene Druckdifferenzen kann der entsprechende Öffnungspunkt (Stromwert) bestimmt und gespeichert werden. Now the inlet valve EV (step S) is energized with a falling current ramp or stair function. The valve EV is closed when the current is fully supplied. At a value of the valve excitation current corresponding to the pressure difference across the valve, the valve begins to open. The associated pressure compensation is determined by the pressure sensor 13 in the HZ. The corresponding opening point (current value) can be determined and saved for different pressure differences.
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 that for the pressure difference associated opening point. The AD valve can be activated by means of Current ramp, stair function or a changeable PWM will be realized. Because of the test rod different pressures can be specified and thus different volumes in the System can be introduced, it is very simple Way possible, the opening point for different differential pressures to determine.
Fig. 3 beschreibt die einzelnen Schritte zur Kalibrierung eines Trennventils TV, hier des TV 2 (siehe Fig. 1), das die Einlassventile 5 und 6 mit dem Hauptzylinder HZ des Bremsdruckgebers 14 verbindet. Fig. 3 describes the steps for calibrating a separating valve TV, here of the television 2 (see FIG. 1) connected to the master cylinder HZ connecting the intake valves 5 and 6 of the braking pressure generator fourteenth
Es handelt sich wiederum um ein stromlos offenes analogisiertes Hydraulikventil. Im Unterschied zum Verfahrensablauf nach Fig. 2 kann im Schritt 4 die Bremsdruckdifferenz über dem geschlossenen Trennventil nur geschätzt, nicht jedoch mit dem Sensor 13 am HZ gemessen werden. Ein weitere Drucksensor neben dem Sensor 13 steht in der Ausführungsart nach Fig. 3 nicht zur Verfügung. Der Druck an der Eingangsseite des Einlassventils und damit die Druckdifferenz über dem geschlossenen Trennventil TV (der Druck im HZ ist in dieser Phase nahezu 0) lässt sich ausreichend genau aus der Ansteuerungszeit der Hydraulikpumpe HP errechnen bzw. auf Basis der Pumpenansteuerungszeit abschätzen. It is in turn a currentless, open, analogized hydraulic valve. In contrast to the process sequence according to FIG. 2, the brake pressure difference across the closed isolation valve can only be estimated in step 4 , but not measured with the sensor 13 at the HZ. Another pressure sensor in addition to the sensor 13 is not available in the embodiment according to FIG. 3. The pressure at the inlet side of the inlet valve and thus the pressure difference across the closed isolation valve TV (the pressure in the HZ is almost 0 in this phase) can be calculated with sufficient accuracy from the activation time of the hydraulic pump HP or estimated on the basis of the pump activation time.
Claims (6)
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. 1. A 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 which brake pressure generated with the aid of a brake pressure sensor via a isolating valve and enters via an inlet valve to a wheel brake and directed in which, in a closed system brake pressure via an outlet valve from the wheel brake to a low-pressure accumulator and conveyed back through a return pump into the brake circuit, wherein as are used separating valve and as an inlet valve which analogized hydraulic valves, characterized .
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 and the pressure in the brake system is reduced by opening the outlet valve,
that after closing the inlet valve, the pressure medium is returned by activating the pump,
that the pressure in the brake system or the pressure difference across the hydraulic valve to be calibrated, which is dependent on the control of the pump, is measured or estimated,
that the hydraulic valve to be calibrated is switched over by a ramp-shaped or step-like change in the valve current, and
that the valve excitation current flowing at the beginning of the switching process, ie at the beginning of the opening or closing of the valve, is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 | 2001-07-11 | ||
| DE10133079.0 | 2001-07-11 | ||
| DE10219309 | 2002-04-30 | ||
| DE10219309.6 | 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 |
|---|---|
| DE10221456A1 true DE10221456A1 (en) | 2003-02-06 |
| DE10221456B4 DE10221456B4 (en) | 2011-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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| DE (1) | DE10221456B4 (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005054028A1 (en) | 2003-12-08 | 2005-06-16 | Continental Teves Ag & Co. Ohg | Method for calibrating analogue regulating, electrically controllable hydraulic valves |
| WO2006035036A1 (en) * | 2004-09-30 | 2006-04-06 | Continental Teves Ag & Co. Ohg | Method for calibrating the flow/opening characteristics of an electrically controllable, analogue regulating hydraulic valve |
| WO2007042349A1 (en) * | 2005-10-12 | 2007-04-19 | Continental Teves Ag & Co. Ohg | Method for determining the wheel pressure in an electronically actuable 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 |
| EP1795416A1 (en) * | 2005-11-11 | 2007-06-13 | Toyota Jidosha Kabushiki Kaisha | Brake control apparatus and control method thereof |
| 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 |
| 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 |
| DE102006055767A1 (en) * | 2006-06-13 | 2008-03-27 | Continental Teves Ag & Co. Ohg | Method for calibrating pressure flow characteristic of analogue or analogue controlled hydraulic inlet valve of controlled break system for vehicle, involves building up pressure through driver by pedal actuated break pressure dispenser |
| 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 |
| DE102008013043A1 (en) | 2007-03-09 | 2008-09-11 | Continental Teves Ag & Co. Ohg | Process for controlling analog valves of a motor vehicle braking system using a current/pressure characteristic curve comprises assigning an upper and lower limit value to the curve that represent an upper and lower tolerance |
| WO2008107219A1 (en) * | 2007-03-05 | 2008-09-12 | Continental Teves Ag & Co. Ohg | Method for the calibration of analogized valves in a pressure control device |
| CN100418815C (en) * | 2005-03-25 | 2008-09-17 | 丰田自动车株式会社 | Vehicle brake fluid pressure control device |
| WO2010006919A1 (en) * | 2008-07-18 | 2010-01-21 | Robert Bosch Gmbh | Method and device for determining and balancing the working point of valves in a hydraulic system |
| WO2012013328A1 (en) | 2010-07-30 | 2012-02-02 | Lucas Automotive Gmbh | Method of operating an electrically controllable brake system and brake system which is operated according to the method |
| 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 |
| DE102007015265B4 (en) * | 2006-03-28 | 2021-01-07 | Continental Teves Ag & Co. Ohg | Method for determining the opening current characteristics of analog controlled valves |
| 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 |
| CN114876791A (en) * | 2022-06-02 | 2022-08-09 | 河南航天液压气动技术有限公司 | Flow intelligent calibration gear pump |
| DE102013203599B4 (en) | 2012-03-06 | 2023-09-28 | Continental Automotive Technologies GmbH | Method for calibrating analogue controlled hydraulic valves and a brake system |
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 |
-
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 |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005054028A1 (en) | 2003-12-08 | 2005-06-16 | Continental Teves Ag & Co. Ohg | Method for calibrating analogue regulating, electrically controllable hydraulic valves |
| WO2006035036A1 (en) * | 2004-09-30 | 2006-04-06 | Continental Teves Ag & Co. Ohg | Method for calibrating the flow/opening characteristics of an electrically controllable, analogue regulating hydraulic valve |
| 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 |
| CN100418815C (en) * | 2005-03-25 | 2008-09-17 | 丰田自动车株式会社 | Vehicle brake fluid pressure control device |
| WO2007042349A1 (en) * | 2005-10-12 | 2007-04-19 | Continental Teves Ag & Co. Ohg | Method for determining the wheel pressure in an electronically actuable motor vehicle brake control system |
| US8718895B2 (en) | 2005-10-12 | 2014-05-06 | Continental Teves Ag & Co. Ohg | Method for determining the wheel pressure in an electronically actuatable 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 |
| EP1795416A1 (en) * | 2005-11-11 | 2007-06-13 | Toyota Jidosha Kabushiki Kaisha | Brake control apparatus and control method thereof |
| US8007056B2 (en) | 2005-11-11 | 2011-08-30 | Toyota Jidosha Kabushiki Kaisha | Brake control apparatus and control method thereof |
| CN1962330B (en) * | 2005-11-11 | 2010-05-12 | 丰田自动车株式会社 | Brake control apparatus and control method thereof |
| 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 |
| DE102006055767A1 (en) * | 2006-06-13 | 2008-03-27 | Continental Teves Ag & Co. Ohg | Method for calibrating pressure flow characteristic of analogue or analogue controlled hydraulic inlet valve of controlled break system for vehicle, involves building up pressure through driver by pedal actuated break pressure dispenser |
| 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 |
| CN101626927A (en) * | 2007-03-05 | 2010-01-13 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for the calibration of analogized valves in a pressure control device |
| WO2008107219A1 (en) * | 2007-03-05 | 2008-09-12 | Continental Teves Ag & Co. Ohg | Method for the calibration of analogized valves in a pressure control device |
| DE102008013043B4 (en) * | 2007-03-09 | 2020-08-20 | Continental Teves Ag & Co. Ohg | Method for controlling valves in a brake system |
| DE102008013043A1 (en) | 2007-03-09 | 2008-09-11 | Continental Teves Ag & Co. Ohg | Process for controlling analog valves of a motor vehicle braking system using a current/pressure characteristic curve comprises assigning an upper and lower limit value to the curve that represent an upper and lower tolerance |
| WO2010006919A1 (en) * | 2008-07-18 | 2010-01-21 | Robert Bosch Gmbh | Method and device for determining and balancing the working point of valves in a hydraulic system |
| CN103140396A (en) * | 2010-07-30 | 2013-06-05 | 卢卡斯汽车股份有限公司 | Method of operating an electrically controllable brake system and brake system which is operated according to the method |
| CN103140396B (en) * | 2010-07-30 | 2015-09-09 | 卢卡斯汽车股份有限公司 | The method of operation electric-controlled gate system and the brake system according to the method operation |
| US9085289B2 (en) | 2010-07-30 | 2015-07-21 | Lucas Automotive Gmbh | Method of operating an electrically controllable brake system and brake system which is operated according to the method |
| WO2012013328A1 (en) | 2010-07-30 | 2012-02-02 | Lucas Automotive Gmbh | Method of operating an electrically controllable brake system and brake system which is operated according to the method |
| 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 |
| CN114876791A (en) * | 2022-06-02 | 2022-08-09 | 河南航天液压气动技术有限公司 | Flow intelligent calibration gear pump |
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