DE102013209936A1 - Method and device for carrying out braking in a motor vehicle - Google Patents
Method and device for carrying out braking in a motor vehicle Download PDFInfo
- Publication number
- DE102013209936A1 DE102013209936A1 DE201310209936 DE102013209936A DE102013209936A1 DE 102013209936 A1 DE102013209936 A1 DE 102013209936A1 DE 201310209936 DE201310209936 DE 201310209936 DE 102013209936 A DE102013209936 A DE 102013209936A DE 102013209936 A1 DE102013209936 A1 DE 102013209936A1
- Authority
- DE
- Germany
- Prior art keywords
- switching valve
- hsv
- pressure switching
- return pump
- braking
- 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.)
- Pending
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Classifications
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
- B60T13/142—Systems with master cylinder
- B60T13/145—Master cylinder integrated or hydraulically coupled with booster
- B60T13/146—Part of the system directly actuated by booster pressure
-
- 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
- B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/441—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters
- B60T8/442—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters the booster being a fluid return pump, e.g. in combination with a brake pedal force booster
-
- 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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur Durchführung einer Bremsung bei einem Kraftfahrzeug mit wenigstens einem eine Rückförderpumpe, ein Hochdruckschaltventil und ein Umschaltventil aufweisenden Bremskreis, wobei die Bremsung einen vom Fahrers mittels eines Bremspedals vorgegebenen ersten Bremskraftanteil und einen mittels der Rückförderpumpe fahrerunabhängig erzeugten zweiten Bremskraftanteil umfasst, bei dem – zuerst bei geschlossenem Hochdruckschaltventil und offenem Umschaltventil die Rückförderpumpe aktiviert wird, – zu einem späteren Zeitpunkt das geschlossene Hochdruckschaltventil geöffnet wird und – zu einem noch späteren Zeitpunkt das offene Umschaltventil geschlossen wird.The invention relates to a method for carrying out braking in a motor vehicle with at least one brake circuit having a return pump, a high-pressure switching valve and a changeover valve, the braking comprising a first braking force component specified by the driver by means of a brake pedal and a second braking force component generated independently of the driver by means of the return pump which - first the return pump is activated when the high-pressure switching valve is closed and the switching valve is open, - the closed high-pressure switching valve is opened at a later point in time and - the open switching valve is closed at a later point in time.
Description
Stand der TechnikState of the art
Offenbarung der ErfindungDisclosure of the invention
Die Erfindung betrifft ein Verfahren zur Durchführung einer Bremsung bei einem Kraftfahrzeug mit wenigstens einem eine Rückförderpumpe, ein Hochdruckschaltventil und ein Umschaltventil aufweisenden Bremskreis, wobei die Bremsung einen vom Fahrers mittels eines Bremspedals vorgegebenen ersten Bremskraftanteil und einen mittels der Rückförderpumpe fahrerunabhängig erzeugten zweiten Bremskraftanteil umfasst, bei dem
- – zuerst bei geschlossenem Hochdruckschaltventil und offenem Umschaltventil die Rückförderpumpe aktiviert wird,
- – zu einem späteren Zeitpunkt das geschlossene Hochdruckschaltventil geöffnet wird und
- – zu einem noch späteren Zeitpunkt das offene Umschaltventil geschlossen wird.
- - first the return pump is activated when the high-pressure switching valve is closed and the switching valve is open,
- - At a later date, the closed high-pressure switching valve is opened and
- - At an even later date, the open switching valve is closed.
Durch die Erfindung wird eine Abmilderung bzw. Dämpfung von Druckausgleichsvorgängen bewirkt, welche bei Bremsvorgängen auftreten, welche neben der vom Fahrer mittels des Bremspedals vorgegebenen Bremskraftkomponente eine zusätzliche fahrerunabhängig erzeugte Bremskraftkomponente enthalten. By the invention, a mitigation or damping of pressure compensation processes is effected, which occur during braking processes, which contain an additional driver-independently generated braking force component in addition to the predetermined by the driver by means of the brake pedal brake force component.
Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass das Verfahren nur dann durchgeführt wird, wenn die Intensität des ersten Bremskraftanteils unterhalb eines vorgegebenen Schwellenwertes liegt.An advantageous embodiment of the invention is characterized in that the method is only performed when the intensity of the first braking force component is below a predetermined threshold value.
Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass das Zeitintervall zwischen der Aktivierung der Rückförderpumpe und dem Öffnen des Hochdruckschaltventils geringer als das Zeitintervall zwischen dem Öffnen des Hochdruckschaltventils und dem Schließen des Umschaltventils ist.An advantageous embodiment of the invention is characterized in that the time interval between the activation of the return pump and the opening of the high-pressure switching valve is less than the time interval between the opening of the high-pressure switching valve and the closing of the switching valve.
Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass das Zeitintervall zwischen dem Öffnen des Hochdruckschaltventils und dem Schließen des Umschaltventils eine Länge von ungefähr 0.1 Sekunden aufweist.An advantageous embodiment of the invention is characterized in that the time interval between the opening of the high-pressure switching valve and the closing of the switching valve has a length of about 0.1 seconds.
Weiter umfasst die Erfindung eine Vorrichtung, enthaltend Mittel, die zur Durchführung der vorstehend genannten Verfahren ausgestaltet sind. Bei dieser Vorrichtung handelt es sich insbesondere um ein Steuergerät, welches mit dem Programmcode zur Durchführung der erfindungsgemäßen Verfahren ausgestattet ist.Furthermore, the invention comprises a device comprising means which are designed to carry out the above-mentioned methods. In particular, this device is a control device which is equipped with the program code for carrying out the method according to the invention.
Die Zeichnung umfasst die
Aktuelle Fahrzeugregelsysteme enthalten neben den die Fahrzeugbewegung stabilisierenden Eigenschaften zunehmend erweiterte Funktionsumfänge. Eine solche zusätzliche Funktion ist die Hydraulic-Brake-Boost-Funktion HBB. Diese Funktion unterstützt den Fahrerfuß bei der Bremsaktuation im Falle eines kleinen oder in der Unterstützungsausprägung zu geringen Vakuumbremskraftverstärkers. Der hierbei notwendige aktive Druckaufbau wird durch ein Öffnen des Hochdruckschaltventiles HSV und ein Einschalten der Rückförderpumpe bewirkt. Fahrzeugregelsysteme mit Hochdruckschaltventilen besitzen eine Vorkammer zwischen dem Hochdruckschaltventil und dem Einlasselement der Rückförderpumpe. Liegt am Hochdruckschaltventil eine Druckdifferenz an, dann führt ein Öffnen des HSV zu einem schlagartigen Druckausgleichsvorgang. Dieser Druckausgleichsvorgang kann zu einer den Fahrer störenden Rückwirkung am Bremspedal führen.Current vehicle control systems contain in addition to the vehicle movement stabilizing properties increasingly extended functional scope. One such additional feature is the HBB Hydraulic Brake Boost function. This function supports the driver's foot during brake actuation in the case of a small or, in the support characteristic, too low a vacuum brake booster. The case necessary active pressure build-up is effected by opening the high-pressure switching valve HSV and switching on the return pump. Vehicle control systems with high-pressure switching valves have an antechamber between the high-pressure switching valve and the inlet element of the return pump. If there is a pressure difference at the high-pressure switching valve, opening the HSV leads to a sudden pressure equalization process. This pressure equalization process can lead to a disturbing effect on the driver on the brake pedal.
Ein vereinfachter Hydraulikschaltplan eines solchen Fahrzeugregelsystems ist in
Während einer teilaktiven Bremsung mit einer Aktivierung des Hochdruckschaltventils bei einer laufenden Rückförderpumpe soll der resultierende Druckausgleichsvorgang möglichst stark gedämpft werden. Eine Dehnung bzw. Verschmierung des Druckausgleichsvorgangs über die Zeit soll zu einem verbesserten Pedalgefühl für den Fahrerfuß am Bremspedal dienen. Unter dem Begriff der „teilaktiven Bremsung“ wird dabei eine Bremsung verstanden, bei welcher sowohl die Bremspedalbetätigung des Fahrers als auch ein aktiver Druckaufbau durch die Rückförderpumpe parallel zum Druckaufbau in den Radbremszylindern beitragen.During a partially active braking with an activation of the high-pressure switching valve in a running return pump, the resulting pressure equalization process should be damped as much as possible. Stretching or blurring the pressure equalization process over time should serve to provide an improved pedal feel for the driver's foot on the brake pedal. The term "partially active braking" is understood to mean a braking operation in which both the brake pedal actuation of the driver and an active pressure build-up by the return pump contribute in parallel to the pressure build-up in the wheel brake cylinders.
In den
- – der Status der Rückförderpumpe, bezeichnet mit „pump activation flag“,
- – der Status des Umschaltventils, bezeichnet mit „USV activation flag“ und
- – der Status des Hochdruckschaltventils, bezeichnet mit „HSV activation flag“. Dabei ist anfangs, d.h. am linken Abszissenrand, jeweils
- – die Rückförderpumpe ausgeschaltet, d.h. es ist der Status „Low“ für das „pump actuation flag“,
- – das stromlos offene Umschaltventil ist offen, das „USV actuation flag“ weist ebenso den Status „Low“ auf und
- – das stromlos geschlossene Hochdruckschaltventil ist geschlossen, das „HSV activation flag“ hat den Status „Low“.
- - the status of the return pump, marked "pump activation flag",
- - the status of the changeover valve, labeled "USV activation flag" and
- - the status of the high pressure switching valve, marked "HSV activation flag". It is initially, ie on the left abscissa edge, respectively
- - the return pump is switched off, ie it is the status "Low" for the "pump actuation flag",
- - The normally open changeover valve is open, the "UPS actuation flag" also has the status "Low" and
- - The normally closed high-pressure switching valve is closed, the "HSV activation flag" has the status "Low".
Zu unterschiedlichen Zeitpunkten wie dargestellt werden diese drei Flags in den Status „High“ geschaltet und am rechten Abszissenrand ist die Rückförderpumpe in Betrieb, das Umschaltventil geschlossen und das Hochdruckschaltventil offen.At different times as shown, these three flags are switched to the "High" status, and the return pump is in operation at the right abscissa, the changeover valve is closed and the high-pressure switching valve is open.
In
Insbesondere im sogenannten Komfortbremsbereich, welcher sich durch kleine bis mittlere Druckgradienten am Hauptbremszylinder auszeichnet, soll durch eine gezielte Ansteuerung vorhandener Komponenten in ESP-Systemen eine Dämpfung der Druckausgleichsvorgänge bewirkt werden und damit die Rückwirkung des Bremspedals auf den Fahrerfuß reduziert werden.In particular, in the so-called comfort brake range, which is characterized by small to medium pressure gradients on the master cylinder, should be effected by a targeted control of existing components in ESP systems damping the pressure compensation operations and thus the retroactive effect of the brake pedal can be reduced to the driver's foot.
Dies wird erfindungsgemäß dadurch erreicht, dass das USV gegenüber dem HSV zeitlich verzögert angesteuert wird. Das bedeutet, dass beim Öffnungsvorgang des HSV das USV kurzzeitig noch offen ist, es findet kein schlagartiger Druckausgleichsvorgang statt. Eine entsprechende Messung ist in
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310209936 DE102013209936A1 (en) | 2013-05-28 | 2013-05-28 | Method and device for carrying out braking in a motor vehicle |
JP2014109026A JP6537784B2 (en) | 2013-05-28 | 2014-05-27 | Method and apparatus for braking in a vehicle |
CN201410226910.1A CN104210478B (en) | 2013-05-28 | 2014-05-27 | Method and apparatus for implementing braking on motor vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310209936 DE102013209936A1 (en) | 2013-05-28 | 2013-05-28 | Method and device for carrying out braking in a motor vehicle |
Publications (1)
Publication Number | Publication Date |
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DE102013209936A1 true DE102013209936A1 (en) | 2014-12-04 |
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ID=51899316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201310209936 Pending DE102013209936A1 (en) | 2013-05-28 | 2013-05-28 | Method and device for carrying out braking in a motor vehicle |
Country Status (3)
Country | Link |
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JP (1) | JP6537784B2 (en) |
CN (1) | CN104210478B (en) |
DE (1) | DE102013209936A1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004029838B4 (en) * | 2004-06-19 | 2017-03-23 | Robert Bosch Gmbh | Method for avoiding pressure pulses in a brake system |
JP2006069372A (en) * | 2004-09-02 | 2006-03-16 | Bosch Corp | Inspection method for pump in vehicle brake control device |
DE102004050755A1 (en) * | 2004-09-09 | 2006-03-16 | Robert Bosch Gmbh | Method for pre-filling a low-pressure accumulator of a motor vehicle brake system |
DE102009045993A1 (en) * | 2009-10-26 | 2011-04-28 | Robert Bosch Gmbh | Method for controlling a high-pressure switching valve in a hydraulic vehicle brake system |
DE102010062188A1 (en) * | 2010-11-30 | 2012-05-31 | Robert Bosch Gmbh | Method for operating hydraulic vehicle brake assembly, involves controlling braking pressure structure valve, braking pressure sinking valve and separation valve such that pulsation of delivered flow of piston pump is reduced |
-
2013
- 2013-05-28 DE DE201310209936 patent/DE102013209936A1/en active Pending
-
2014
- 2014-05-27 CN CN201410226910.1A patent/CN104210478B/en active Active
- 2014-05-27 JP JP2014109026A patent/JP6537784B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN104210478A (en) | 2014-12-17 |
JP6537784B2 (en) | 2019-07-03 |
JP2014231352A (en) | 2014-12-11 |
CN104210478B (en) | 2018-08-07 |
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