DE102013004618B3 - Braking system for motor vehicle, particularly hybrid electric vehicle, comprises unit for detecting fault, counter for counting actuation of brake pedal, and vacuum brake force booster that is deactivated when error is detected - Google Patents
Braking system for motor vehicle, particularly hybrid electric vehicle, comprises unit for detecting fault, counter for counting actuation of brake pedal, and vacuum brake force booster that is deactivated when error is detected Download PDFInfo
- Publication number
- DE102013004618B3 DE102013004618B3 DE201310004618 DE102013004618A DE102013004618B3 DE 102013004618 B3 DE102013004618 B3 DE 102013004618B3 DE 201310004618 DE201310004618 DE 201310004618 DE 102013004618 A DE102013004618 A DE 102013004618A DE 102013004618 B3 DE102013004618 B3 DE 102013004618B3
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- Prior art keywords
- brake
- vacuum
- counter
- brake pedal
- motor vehicle
- Prior art date
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- Expired - Fee Related
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- 230000003213 activating effect Effects 0.000 claims abstract description 3
- 230000007257 malfunction Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012544 monitoring process 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
- 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
- B60T13/24—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 gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
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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
- 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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
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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
-
- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Die Erfindung betrifft eine Bremsanlage für ein Kraftfahrzeug, mit einem Bremspedal und einem an eine Unterdruckquelle angeschlossenen Unterdruck-Bremskraftverstärker.The invention relates to a brake system for a motor vehicle, with a brake pedal and a negative pressure brake booster connected to a vacuum source.
Eine Bremsanlage für ein Kraftfahrzeug besteht üblicherweise aus einer Energieversorgung, einer Betätigungseinrichtung, einer Übertragungseinrichtung zur Bremskraftsteuerung und Radbremsen.A brake system for a motor vehicle usually consists of a power supply, an actuating device, a transmission device for braking force control and wheel brakes.
Bremsanlagen in Kraftfahrzeugen weisen normalerweise eine Bremskraftunterstützung (Hilfskraft-Bremsanlage) auf, die als Energiequelle die Druckdifferenz zwischen der Umgebung und einem Unterdruck nutzt. Dazu ist ein Bremskraftverstärker (BKV), insbesondere ein Unterdruck-Bremskraftverstärker vorgesehen. Bei einem Unterdruck-Bremskraftverstärker wird pedalkraftabhängig eine pedalseitige Arbeitsmembranfläche mit Außenluftdruck beaufschlagt, während auf der anderen Seite der Membran Unterdruck anliegt. Die aus der Druckdifferenz resultierende Kraft auf die Arbeitsmembran bewirkt einen die Fußkraft unterstützenden Kraftanteil.Brake systems in motor vehicles normally have a brake power assistance (auxiliary power brake system), which uses as an energy source, the pressure difference between the environment and a negative pressure. For this purpose, a brake booster (BKV), in particular a vacuum brake booster is provided. In the case of a vacuum brake booster, a pedal-side working diaphragm surface is subjected to external air pressure, depending on the pedal force, while negative pressure is applied to the other side of the diaphragm. The force resulting from the pressure difference on the working diaphragm causes a force component supporting the foot force.
Der Unterdruck wird entweder durch den Saugrohrunterdruck in einem Ottomotor oder durch eine Pumpe im Riementrieb eines Dieselmotors erzeugt.The negative pressure is generated either by the Saugrohrunterdruck in a gasoline engine or by a pump in the belt drive of a diesel engine.
Bei Fahrzeugen, die zumindest teilweise elektrisch fahren können, z. B. ein Hybridelektrofahrzeug (HEV), ein Plug-in-Hybridfahrzeug (PHEV) oder ein batterieelektrisches Fahrzeug (BEV) wird eine Unterdruckpumpe von einem Elektromotor angetrieben, der von dem Bordnetz des Kraftfahrzeugs gespeist wird.For vehicles that can drive at least partially electrically, for. As a hybrid electric vehicle (HEV), a plug-in hybrid vehicle (PHEV) or a battery electric vehicle (BEV), a vacuum pump is driven by an electric motor, which is powered by the electrical system of the motor vehicle.
Eine gattungsgemäße Bremsanlage für ein Kraftfahrzeug ist aus der
Aus dem Dokument
Die
Die
Bremsanlagen für Kraftfahrzeuge müssen Zulassungsvorschriften erfüllen, in denen festgelegt ist, welche Mindestfunktion und Bremsleistung ein Bremssystem aufweisen muss, sowohl bei normaler Funktion als auch in Sondersituationen, wie beispielsweise einem Teilausfall.Automotive braking systems must comply with registration requirements that specify the minimum function and braking performance of a braking system, both during normal functioning and in special situations, such as a partial failure.
Die Zulassungsvorschrift ECE R79 schreibt vor, dass bei einem Ausfall der Energieversorgung des Bremssystems, das aus derselben Quelle wie die Lenkung gespeist wird, nach achtmaligem vollständigen Niederdrücken des Bremspedals noch eine Mindestbremswirkung von 2,9 m/s2 erreicht werden muss. Allerdings ist die Speicherkapazität eines herkömmlichen Unterdruck-Bremskraftverstärkers nicht ausreichend, um nach achtfacher Betätigung noch eine Bremskraftunterstützung zu liefern. Das Vorsehen einer redundanten Energieversorgung oder ein entsprechend vergrößerter Unterdruckspeicher sind mit erheblichen Kosten, Entwicklungsaufwand und Platzbedarf verbunden. In der Praxis muss eine Bremsanlage, einschließlich der Radbremsen und aller Komponenten daher so ausgelegt werden, dass die vorgeschriebene Verzögerung von 2,9 m/s2 auch ohne Bremskraftunterstützung erreicht wird. Herkömmliche Bremsanlagen sind daher nicht optimal im Hinblick auf Gewicht, Pedalweg und Pedalgefühl.The approval requirement ECE R79 stipulates that in case of failure of the power supply of the braking system, which is fed from the same source as the steering, a minimum braking effect of 2.9 m / s 2 must be achieved after eight full depressions of the brake pedal. However, the storage capacity of a conventional vacuum brake booster is not sufficient to still provide a brake assist after eightfold operation. The provision of a redundant power supply or a correspondingly enlarged vacuum reservoir are associated with considerable costs, development effort and space requirements. In practice, a brake system, including the wheel brakes and all components must therefore be designed so that the prescribed deceleration of 2.9 m / s 2 is achieved even without brake assist. Conventional brake systems are therefore not optimal in terms of weight, pedal travel and pedal feel.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Bremsanlage für ein Kraftfahrzeug anzugeben, die bei einem Ausfall der Energieversorgung auch nach mehrmaligem Betätigen des Bremspedals eine Bremskraftunterstützung durch einen Unterdruck-Bremskraftverstärker zur Verfügung stellen kann, so dass die Zulassungsvorschriften eingehalten werden können.The invention is therefore based on the object to provide a brake system for a motor vehicle, which in case of failure of Power supply even after repeated actuation of the brake pedal can provide a brake power assistance by a vacuum brake booster available, so that the approval requirements can be met.
Zur Lösung dieser Aufgabe ist bei einer Bremsanlage der eingangs genannten Art erfindungsgemäß vorgesehen, dass sie ein Mittel zum Erkennen einer Störung aufweist und dass bei einer erkannten Störung ein mit dem Bremspedal verbundener Zähler aktivierbar ist, der jede Bewegung des Bremspedals zählt und dass bei einer erkannten Störung der Unterdruck-Bremskraftverstärker deaktiviert und erst nach einer festgelegten Anzahl von Betätigungen des Bremspedals wieder aktiviert wird.To solve this problem is provided according to the invention in a brake system of the type mentioned that it has a means for detecting a fault and that at a detected fault connected to the brake pedal counter is activated, which counts every movement of the brake pedal and that at a detected Malfunction of the vacuum brake booster disabled and only after a specified number of actuations of the brake pedal is activated again.
Die Erfindung beruht auf die Idee, dass nach einem Ausfall der Energieversorgung des Unterdruck-Bremskraftverstärkers die zur Verfügung stehende Energie, das heißt der zur Verfügung stehende Unterdruckvorrat erst nach einer bestimmten Anzahl von Betätigungen des Bremspedals eingesetzt wird. Dadurch wird sichergestellt, dass die in den Zulassungsvorschriften geforderte Hilfsbremswirkung eingehalten wird.The invention is based on the idea that after a failure of the power supply of the vacuum brake booster the available energy, that is, the available vacuum supply is used only after a certain number of operations of the brake pedal. This ensures that the auxiliary braking effect required in the approval regulations is maintained.
Vorzugsweise ist der Zähler der erfindungsgemäßen Bremsanlage als mechanischer, elektrischer oder elektronischer Zähler ausgebildet. Bei der erfindungsgemäßen Bremsanlage kann es vorgesehen sein, dass sie ein Ventil zum Deaktivieren oder Aktivieren des Unterdruck-Bremskraftverstärkers aufweist. Im aktivierten Zustand ist das Ventil geöffnet, so dass wie bei einem herkömmlichen Bremskraftverstärker die Bremskraftunterstützung in der vorgesehenen Weise zur Verfügung steht. Im deaktivierten Zustand wird das Ventil geschlossen, so dass der in dem Unterdruck-Bremskraftverstärker vorhandene Unterdruckvorrat nicht verbraucht wird. In diesem Betriebszustand wird die Bremsanlage lediglich durch die Betätigung des Bremspedals durch den Fahrer gebremst.Preferably, the counter of the brake system according to the invention is designed as a mechanical, electrical or electronic counter. In the brake system according to the invention, it may be provided that it has a valve for deactivating or activating the vacuum brake booster. When activated, the valve is open, so that as in a conventional brake booster, the brake assist is available in the intended manner. In the deactivated state, the valve is closed, so that the existing in the vacuum brake booster vacuum supply is not consumed. In this operating state, the brake system is braked only by the operation of the brake pedal by the driver.
Gemäß einer bevorzugten Weiterbildung der erfindungsgemäßen Bremsanlage kann der Zähler mit einer Steuerscheibe gekoppelt sein, um das Ventil nach der festgelegten Anzahl von Betätigungen des Bremspedals zu schalten. Wesentlich ist dabei, dass der Zähler und die Steuerscheibe rein mechanisch arbeiten, so dass keine elektrische Stromversorgung, ein Steuergerät oder dergleichen erforderlich ist.According to a preferred embodiment of the brake system according to the invention, the counter may be coupled to a control disk to switch the valve after the predetermined number of operations of the brake pedal. It is essential that the counter and the control disk work purely mechanically, so that no electrical power supply, a control unit or the like is required.
Daneben betrifft die Erfindung ein Kraftfahrzeug. Das erfindungsgemäße Kraftfahrzeug zeichnet sich dadurch aus, dass es eine Bremsanlage der beschriebenen Art aufweist.In addition, the invention relates to a motor vehicle. The motor vehicle according to the invention is characterized in that it has a brake system of the type described.
Vorzugsweise kann das erfindungsgemäße Kraftfahrzeug als Hybridelektrofahrzeug oder als Plug-in-Hybridfahrzeug oder als batterieelektrisches Fahrzeug ausgebildet sein.Preferably, the motor vehicle according to the invention may be designed as a hybrid electric vehicle or as a plug-in hybrid vehicle or as a battery electric vehicle.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung erläutert.The invention will be explained below with reference to an embodiment with reference to the drawing.
Die Zeichnung zeigt ein erfindungsgemäßes Kraftfahrzeug mit einer erfindungsgemäßen Bremsanlage.The drawing shows an inventive motor vehicle with a brake system according to the invention.
Das in der Figur schematisch dargestellte Kraftfahrzeug
Die Bremsanlage
Die Bremsanlage
Die Bremsanlage
Das Deaktivieren des Unterdruck-Bremskraftverstärkers
Der Zähler
In dem Fall, wenn die Störung beziehungsweise der Fehler beseitigt ist, wird der Zähler wieder zurückgesetzt.In the case when the fault is eliminated, the counter is reset.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310004618 DE102013004618B3 (en) | 2013-03-15 | 2013-03-15 | Braking system for motor vehicle, particularly hybrid electric vehicle, comprises unit for detecting fault, counter for counting actuation of brake pedal, and vacuum brake force booster that is deactivated when error is detected |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310004618 DE102013004618B3 (en) | 2013-03-15 | 2013-03-15 | Braking system for motor vehicle, particularly hybrid electric vehicle, comprises unit for detecting fault, counter for counting actuation of brake pedal, and vacuum brake force booster that is deactivated when error is detected |
Publications (1)
Publication Number | Publication Date |
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DE102013004618B3 true DE102013004618B3 (en) | 2014-01-16 |
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DE201310004618 Expired - Fee Related DE102013004618B3 (en) | 2013-03-15 | 2013-03-15 | Braking system for motor vehicle, particularly hybrid electric vehicle, comprises unit for detecting fault, counter for counting actuation of brake pedal, and vacuum brake force booster that is deactivated when error is detected |
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DE (1) | DE102013004618B3 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002009989A1 (en) * | 2000-07-28 | 2002-02-07 | Continental Teves Ag & Co. Ohg | System, position transmitter and a receiving device for reliably transmitting the position of a control element, and the use thereof |
JP2002145044A (en) * | 2000-11-14 | 2002-05-22 | Daihatsu Motor Co Ltd | Brake booster pressure estimating device |
DE102006036387A1 (en) * | 2005-08-02 | 2007-02-22 | Continental Teves Ag & Co. Ohg | Method for testing the operation of a brake actuating unit comprises deactivating a connecting/disconnecting device using an actuator by operating the brake pedal and detecting and evaluating the movement of the brake pedal |
DE102006015483A1 (en) * | 2006-04-03 | 2007-10-04 | Robert Bosch Gmbh | Controlling method e.g. for controlling braking system of vehicle, involves having vacuum brake booster and vacuum source with variable triggering threshold value dependent upon vacuum level or vacuum gradients |
-
2013
- 2013-03-15 DE DE201310004618 patent/DE102013004618B3/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002009989A1 (en) * | 2000-07-28 | 2002-02-07 | Continental Teves Ag & Co. Ohg | System, position transmitter and a receiving device for reliably transmitting the position of a control element, and the use thereof |
JP2002145044A (en) * | 2000-11-14 | 2002-05-22 | Daihatsu Motor Co Ltd | Brake booster pressure estimating device |
DE102006036387A1 (en) * | 2005-08-02 | 2007-02-22 | Continental Teves Ag & Co. Ohg | Method for testing the operation of a brake actuating unit comprises deactivating a connecting/disconnecting device using an actuator by operating the brake pedal and detecting and evaluating the movement of the brake pedal |
DE102006015483A1 (en) * | 2006-04-03 | 2007-10-04 | Robert Bosch Gmbh | Controlling method e.g. for controlling braking system of vehicle, involves having vacuum brake booster and vacuum source with variable triggering threshold value dependent upon vacuum level or vacuum gradients |
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