WO2007088165A1 - Vacuum supply device - Google Patents

Vacuum supply device Download PDF

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Publication number
WO2007088165A1
WO2007088165A1 PCT/EP2007/050894 EP2007050894W WO2007088165A1 WO 2007088165 A1 WO2007088165 A1 WO 2007088165A1 EP 2007050894 W EP2007050894 W EP 2007050894W WO 2007088165 A1 WO2007088165 A1 WO 2007088165A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum
vacuum pump
consumer
pump
supply device
Prior art date
Application number
PCT/EP2007/050894
Other languages
German (de)
French (fr)
Inventor
Gerd Baur
Werner Quirant
Andreas Tost
Matthias Leiblein
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2007088165A1 publication Critical patent/WO2007088165A1/en

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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
    • B60T13/24—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
    • 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
    • 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
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/30—Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles

Definitions

  • the invention relates to a vacuum supply device for at least one
  • negative pressure is needed primarily for brake boosting and secondarily for the operation of various other consumers. It is known to use the negative pressure generated by the internal combustion engine in the intake tract to supply the consumer. Furthermore, the internal combustion engine mechanically driven, wet-running vacuum pumps to supply the consumer with
  • Vacuum provided.
  • electrically driven, dry-running vacuum pumps as additional pumps for certain operating situations in which the internal combustion engine in the intake tract, or driven by the engine vacuum pump can not provide the required negative pressure.
  • Such operating situations are, for example, the start-stop operation of the internal combustion engine or a cold start with an open throttle for catalyst heating.
  • the electrically operated vacuum pump is parallel to the mechanically driven by the engine vacuum pump or parallel to a
  • Vacuum supply line between consumer and intake arranged.
  • the electrically operated vacuum pumps of the prior art have due to their execution as a dry-running pump worse efficiency at evacuation below 200 mbar absolute pressure compared to the conventional mounted on the engine mechanical vacuum pumps, which achieve higher efficiency by their oil lubrication and the gap seal achieved thereby , This results in longer evacuation times and thus a reduced braking force support in certain driving situations and longer maturities of the electromotive vacuum pump with the result of high costs to ensure the required life.
  • the invention has for its object to provide an improved vacuum supply device with a vacuum pump with reduced running time.
  • the invention is based on the idea to arrange the vacuum pump in series between the consumer and the vacuum source.
  • the input of the vacuum pump with a consumer, in particular a brake booster, connected, whereby air is sucked out of this.
  • the output of the pump is, in contrast to the prior art, not connected to the atmosphere, but with the vacuum source, in particular the intake tract of the internal combustion engine.
  • the vacuum pump does not demand the intake sucked by the consumers against the atmosphere, but against the provided by the vacuum source vacuum level.
  • the use of the intake tract as a vacuum source can be used in particular in gasoline engines, which are preferably used in motor vehicles with hybrid drive. Also, the intake can be used in direct-injection engines as a vacuum source, although the negative pressure in the intake system is reduced in such engines.
  • the vacuum supply device is particularly suitable for use in motor vehicles with hybrid drive.
  • the inventive arrangement of the electric motor operated vacuum pump whose disadvantages, such as in particular the worse efficiency, compensated.
  • the electric motor driven vacuum pump has to overcome only a small pressure difference, whereby the running time is reduced compared to a conventional parallel arrangement.
  • At least one vacuum sensor connected to a regulating and / or control device is provided for controlling the vacuum pump.
  • This vacuum sensor is preferably arranged on the suction side of the vacuum pump and thus measures the negative pressure applied to the consumer. If a predetermined switch-off, eg 150 mbar absolute pressure is exceeded, the vacuum pump is switched off. If the absolute pressure measured by the vacuum sensor exceeds a predetermined upper switch-on threshold of, for example, 330 mbar, the pump is switched on again.
  • a bypass line is provided in an embodiment of the invention, bypassing the vacuum pump the vacuum source, in particular the intake tract of the internal combustion engine, directly to the consumer, in particular the Bremskraftverstarker connects.
  • Vacuum supply device the mileage of the internal combustion engine can be used in certain operating situations, for example, immediately after the start of the engine at low vacuum level, without throttle losses.
  • a non-return valve within the bypass line is advantageously arranged in an embodiment of the invention.
  • a non-return valve in the connecting line between the vacuum pump and the consumer is arranged so that the vacuum level can be maintained in the consumer even when the vacuum pump is switched off.
  • the invention is at least one on the pressure side of the vacuum pump Vacuum reservoir provided. This serves to obtain a vacuum on the pressure side of the vacuum pump when the internal combustion engine is at a standstill, in particular in motor vehicles with a hybrid drive, in order to reduce the running time of the vacuum pump even when the internal combustion engine is switched off.
  • FIG. 1 shows a first embodiment of a vacuum supply device with an electric motor driven vacuum pump
  • Fig. 2 shows a second embodiment of a vacuum supply device
  • Fig. 3 shows a third embodiment of a vacuum supply device with additional vacuum reservoir.
  • a vacuum supply device 1 is shown.
  • the vacuum supply device 1 comprises a consumer to be supplied with negative pressure 2, which is formed in the illustrated embodiments as a brake booster.
  • the consumer 2 is part of a brake system 3.
  • the brake booster 2 supports the force applied to a brake pedal 4 foot force when you press the brake and thus reduces the required effort.
  • the vacuum required by the brake booster 2 is provided on the one hand by an internal combustion engine 5 in its intake tract 6 and by a vacuum pump 7 with an electric drive motor 8.
  • the vacuum pump 7 is a dry-running pump.
  • the vacuum pump 7 is in series between the intake
  • Vacuum pump 7 is connected via a second connecting line 12 to the intake tract 6 of the internal combustion engine 5.
  • Vacuum pump 7 in series between the intake manifold 6 and the brake booster 2 can thus shorten the duration of the vacuum pump 7 and thus their life can be extended.
  • the power consumption in the motor vehicle is reduced to supply the consumers with negative pressure.
  • a bypass line 13 is provided, which is the first connection line 10 and the second
  • check valve 14, 15 is arranged in each case.
  • the check valves 14, 15 have the task to maintain the vacuum level at standstill of vacuum pump 7 and / or engine 5 in the brake booster 2.
  • a vacuum sensor 16 is provided, which measures the pressure in the connecting line 10 between the check valve 15 and the brake booster 2.
  • the vacuum sensor 16 is connected to a control and / or control device 17 which acts directly on the drive motor 8. If a predetermined absolute pressure in the brake booster 2 is exceeded, the drive motor 8 is turned on, whereby the
  • Vacuum pump 7 promotes air from the brake booster 2 in the intake manifold 6.
  • the drive motor 8 is switched off again by the control and / or control device when a predetermined absolute pressure, for example 150 mbar, is reached or undershot in the brake booster 2.
  • a predetermined absolute pressure for example 150 mbar
  • the exemplary embodiment according to FIG. 2 essentially corresponds to the exemplary embodiment according to FIG. 1. The only difference is that the return valve 15 is arranged directly adjacent to the vacuum pump 7. 2, only an inflow of air through the vacuum pump 7 in the direction of brake booster 2 is prevented, whereas the check valve of FIG. 1 additionally seals the bypass line 13.
  • a connecting line to a vacuum reservoir 18 extends into the second connecting line 12 between the intake tract 6 and the vacuum pump 7. This serves to maintain a negative pressure on the pressure side 11 of the vacuum pump 7 when the internal combustion engine is switched off, for example in motor vehicles with hybrid drive .
  • a third check valve 20 is arranged between the junction 19 of the connecting line to the vacuum reservoir 18 with the second connecting line 12 and the intake manifold 6, . Otherwise, the configuration of the vacuum supply device according to FIG. 3 corresponds to the exemplary embodiment according to FIG. 2.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The invention relates to a vacuum supply device (1) for at least one consumer (2) in a motor vehicle. In order to supply the consumer (2) with a vacuum, a vacuum source (6) and a vacuum pump (7) are provided. In order to reduce the operating time of the vacuum pump, the suction side (9) of the vacuum pump (7) is connected to the consumer (2) and the pressure side (11) is connected to the vacuum source (6).

Description

UnterdruckversorgungseinrichtungUnder pressure supply device
Stand der TechnikState of the art
Die Erfindung betrifft eine Unterdruckversorgungseinrichtung für mindestens einenThe invention relates to a vacuum supply device for at least one
Verbraucher in einem Kraftfahrzeug gemäß dem Oberbegriff des Anspruchs 1.Consumer in a motor vehicle according to the preamble of claim 1.
In Kraftfahrzeugen wird Unterdruck primär zur Bremskraftverstärkung und sekundär zum Betrieb diverser sonstiger Verbraucher benötigt. Es ist bekannt, den vom Verbrennungsmotor im Ansaugtrakt erzeugten Unterdruck zur Versorgung der Verbraucher zu nutzen. Ferner werden vom Verbrennungsmotor mechanisch angetriebene, nass laufende Unterdruckpumpen zur Versorgung der Verbraucher mitIn motor vehicles, negative pressure is needed primarily for brake boosting and secondarily for the operation of various other consumers. It is known to use the negative pressure generated by the internal combustion engine in the intake tract to supply the consumer. Furthermore, the internal combustion engine mechanically driven, wet-running vacuum pumps to supply the consumer with
Unterdruck bereitgestellt. Zusätzlich ist es bekannt, elektrisch angetriebene, trocken laufende Unterdruckpumpen als Zusatzpumpen für bestimmte Betriebssituationen einzusetzen, in denen der Verbrennungsmotor im Ansaugtrakt, oder die vom Verbrennungsmotor angetriebene Unterdruckpumpe nicht den benötigten Unterdruck bereitstellen können. Solche Betriebssituationen sind beispielsweise der Start- Stop-Betrieb des Verbrennungsmotors oder ein Kaltstart mit offener Drosselklappe zur Katalysatorheizung. Die elektrisch betriebene Unterdruckpumpe ist dabei parallel zu der mechanisch vom Verbrennungsmotor angetriebenen Unterdruckpumpe bzw. parallel zu einerVacuum provided. In addition, it is known to use electrically driven, dry-running vacuum pumps as additional pumps for certain operating situations in which the internal combustion engine in the intake tract, or driven by the engine vacuum pump can not provide the required negative pressure. Such operating situations are, for example, the start-stop operation of the internal combustion engine or a cold start with an open throttle for catalyst heating. The electrically operated vacuum pump is parallel to the mechanically driven by the engine vacuum pump or parallel to a
Unterdruckversorgungsleitung zwischen Verbraucher und Ansaugtrakt angeordnet. Die elektrisch betriebenen Unterdruckpumpen nach dem Stand der Technik haben aufgrund ihrer Ausfuhrung als trocken laufende Pumpe einen schlechteren Wirkungsgrad bei Evakuierung unter 200 mbar Absolutdruck im Vergleich zu den herkömmlichen am Verbrennungsmotor angebauten mechanischen Unterdruckpumpen, die durch ihre Olschmierung und die dadurch erreichte Spaltabdichtung einen höheren Wirkungsgrad erzielen. Hieraus folgen längere Evakuierungszeiten und damit eine reduzierte Bremskraft-Unterstützung in bestimmten Fahrsituationen sowie längere Laufzeiten der elektromotorischen Unterdruckpumpe mit der Folge hoher Kosten zur Gewahrleistung der benotigten Lebensdauer.Vacuum supply line between consumer and intake arranged. The electrically operated vacuum pumps of the prior art have due to their execution as a dry-running pump worse efficiency at evacuation below 200 mbar absolute pressure compared to the conventional mounted on the engine mechanical vacuum pumps, which achieve higher efficiency by their oil lubrication and the gap seal achieved thereby , This results in longer evacuation times and thus a reduced braking force support in certain driving situations and longer maturities of the electromotive vacuum pump with the result of high costs to ensure the required life.
Aufgabe und Vorteile der ErfindungPurpose and advantages of the invention
Der Erfindung liegt die Aufgabe zugrunde eine verbesserte Unterdruckversorgungseinrichtung mit einer Unterdruckpumpe mit reduzierter Laufzeit bereitzustellen.The invention has for its object to provide an improved vacuum supply device with a vacuum pump with reduced running time.
Diese Aufgabe wird mit den Merkmalen des Anspruchs 1 gelost. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteranspruchen angegeben.This object is achieved by the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, die Unterdruckpumpe in Reihe zwischen dem Verbraucher und der Unterdruckquelle anzuordnen. Dabei ist der Eingang der Unterdruckpumpe mit einem Verbraucher, insbesondere einem Bremskraftverstarker, verbunden, wodurch Luft aus diesem abgesaugt wird. Der Ausgang der Pumpe ist im Gegensatz zum Stand der Technik nicht mit der Atmosphäre, sondern mit der Vakuumquelle, insbesondere dem Ansaugtrakt des Verbrennungsmotors, verbunden. Hierdurch fordert die Unterdruckpumpe die von den Verbrauchern angesaugte Lauft nicht gegen die Atmosphäre, sondern gegen das von der Unterdruckquelle bereit gestellte Unterdruckniveau.The invention is based on the idea to arrange the vacuum pump in series between the consumer and the vacuum source. In this case, the input of the vacuum pump with a consumer, in particular a brake booster, connected, whereby air is sucked out of this. The output of the pump is, in contrast to the prior art, not connected to the atmosphere, but with the vacuum source, in particular the intake tract of the internal combustion engine. As a result, the vacuum pump does not demand the intake sucked by the consumers against the atmosphere, but against the provided by the vacuum source vacuum level.
Hierdurch liegt eine geringere Druckdifferenz zwischen Saugseite und Druckseite der Unterdruckpumpe an, wodurch die Laufzeit der Unterdruckpumpe erheblich reduziert wird, wodurch sich wiederum die Lebensdauer der Unterdruckpumpe verlängert. Ferner resultiert aus der erfindungsgemäßen Unterdruckversorgungseinrichtung eineThis results in a lower pressure difference between On the suction side and pressure side of the vacuum pump, whereby the running time of the vacuum pump is significantly reduced, which in turn extends the life of the vacuum pump. Furthermore, results from the vacuum supply device according to the invention a
Laufgeräuschreduzierung, da die von der Unterdruckpumpe erzeugten Schallwellen nicht unmittelbar nach außen, sondern in die Unterdruckquelle geleitet werden.Noise reduction, because the sound waves generated by the vacuum pump are not passed directly to the outside, but in the vacuum source.
Die Verwendung des Ansaugtraktes als Unterdruckquelle kann insbesondere bei Benzin-Motoren, die bei Kraftfahrzeugen mit Hybrid-Antrieb vorzugsweise zum Einsatz kommen, eingesetzt werden. Auch lässt sich der Ansaugtrakt bei Direkteinspritzer-Motoren als Unterdruckquelle nutzen, wenn auch der Unterdruck im Ansaugtrakt bei derartigen Motoren reduziert ist.The use of the intake tract as a vacuum source can be used in particular in gasoline engines, which are preferably used in motor vehicles with hybrid drive. Also, the intake can be used in direct-injection engines as a vacuum source, although the negative pressure in the intake system is reduced in such engines.
Wenn als Unterdruckpumpe eine elektromotorisch angetriebene, insbesondere trocken laufende, Pumpe eingesetzt wird, eignet sich die erfindungsgemäße Unterdruckversorgungseinrichtung insbesondere für den Einsatz in Kraftfahrzeugen mit Hybrid-Antrieb. Durch die erfindungsgemäße Anordnung der elektromotorisch betriebenen Unterdruckpumpe werden deren Nachteile, wie insbesondere der schlechtere Wirkungsgrad, kompensiert. Die elektromotorisch angetriebene Unterdruckpumpe muss nur eine geringe Druckdifferenz überwinden, wodurch die Laufzeit gegenüber einer herkömmlichen Parallelanordnung verringert ist.If an electric motor-driven, in particular dry-running, pump is used as a vacuum pump, the vacuum supply device according to the invention is particularly suitable for use in motor vehicles with hybrid drive. The inventive arrangement of the electric motor operated vacuum pump whose disadvantages, such as in particular the worse efficiency, compensated. The electric motor driven vacuum pump has to overcome only a small pressure difference, whereby the running time is reduced compared to a conventional parallel arrangement.
In Weiterbildung der Erfindung ist vorgesehen, dass zur Steuerung der Unterdruckpumpe mindestens ein mit einer Regelungs- und/oder Steuerungseinrichtung verbundener Unterdrucksensor vorgesehen ist. Dieser Unterdrucksensor ist bevorzugt auf der Saugseite der Unterdruckpumpe angeordnet und misst somit den am Verbraucher anliegenden Unterdruck. Wird eine vorgegebene Abschaltschwelle, z.B. 150 mbar Absolutdruck unterschritten, wird die Unterdruckpumpe abgeschaltet. Überschreitet der von dem Unterdrucksensor gemessene Absolutdruck eine vorgegebene obere Einschaltschwelle von z.B. 330 mbar, wird die Pumpe wieder eingeschaltet.In a development of the invention, it is provided that at least one vacuum sensor connected to a regulating and / or control device is provided for controlling the vacuum pump. This vacuum sensor is preferably arranged on the suction side of the vacuum pump and thus measures the negative pressure applied to the consumer. If a predetermined switch-off, eg 150 mbar absolute pressure is exceeded, the vacuum pump is switched off. If the absolute pressure measured by the vacuum sensor exceeds a predetermined upper switch-on threshold of, for example, 330 mbar, the pump is switched on again.
Um in Betriebssituationen, in denen die Vakuum-Saugleistung des Verbrennungsmotors im Ansaugtrakt großer ist als die Vakuum-Saugleistung der Unterdruckpumpe eine Drosselung durch die in Reihe geschaltete Unterdruckpumpe zu verhindern, ist in Ausgestaltung der Erfindung eine Bypass- Leitung vorgesehen, die unter Umgehung der Unterdruckpumpe die Unterdruckquelle, insbesondere den Ansaugtrakt des Verbrennungsmotors, direkt mit dem Verbraucher, insbesondere dem Bremskraftverstarker, verbindet. Durch diese erfindungsgemaße Ausgestaltung derIn order to prevent in operating situations in which the vacuum suction power of the internal combustion engine in the intake is greater than the vacuum suction of the vacuum pump throttling by the series-connected vacuum pump, a bypass line is provided in an embodiment of the invention, bypassing the vacuum pump the vacuum source, in particular the intake tract of the internal combustion engine, directly to the consumer, in particular the Bremskraftverstarker connects. By this inventive design of the
Unterdruckversorgungseinrichtung kann die Laufleistung des Verbrennungsmotors in bestimmten Betriebssituationen, beispielsweise unmittelbar nach dem Start des Verbrennungsmotors bei niedrigem Vakuumniveau, ohne Drosselverluste genutzt werden.Vacuum supply device, the mileage of the internal combustion engine can be used in certain operating situations, for example, immediately after the start of the engine at low vacuum level, without throttle losses.
Um das Vakuumniveau in den Verbrauchern bei abgeschaltetem Verbrennungsmotor oder bei höherer Saugleistung der elektromotorisch betriebenen Unterdruckpumpe zu erhalten, ist in Ausgestaltung der Erfindung mit Vorteil ein Ruckschlagventil innerhalb der Bypassleitung angeordnet.In order to maintain the vacuum level in the consumers when the internal combustion engine is switched off or at higher suction power of the vacuum pump operated by an electric motor, a non-return valve within the bypass line is advantageously arranged in an embodiment of the invention.
Bevorzugt ist ebenfalls ein Ruckschlagventil in der Verbindungsleitung zwischen Unterdruckpumpe und Verbraucher angeordnet, damit das Vakuumniveau im Verbraucher auch bei abgeschalteter Unterdruckpumpe aufrechterhalten werden kann .Preferably, a non-return valve in the connecting line between the vacuum pump and the consumer is arranged so that the vacuum level can be maintained in the consumer even when the vacuum pump is switched off.
Gemäß einer vorteilhaften Weiterbildung der Erfindung ist auf der Druckseite der Unterdruckpumpe mindestens ein Unterdruckreservoir vorgesehen. Dieses dient dazu, bei Stillstand des Verbrennungsmotors, insbesondere bei Kraftfahrzeugen mit Hybrid-Antrieb, einen Unterdruck auf der Druckseite der Unterdruckpumpe zu erhalten, um die Laufzeit der Unterdruckpumpe auch bei abgeschaltetem Verbrennungsmotor zu reduzieren.According to an advantageous embodiment of the invention is at least one on the pressure side of the vacuum pump Vacuum reservoir provided. This serves to obtain a vacuum on the pressure side of the vacuum pump when the internal combustion engine is at a standstill, in particular in motor vehicles with a hybrid drive, in order to reduce the running time of the vacuum pump even when the internal combustion engine is switched off.
Zeichnungendrawings
Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:
Fig. 1 ein erstes Ausführungsbeispiel einer Unterdruck- Versorgungseinrichtung mit einer elektromotorisch angetriebenen Unterdruckpumpe,1 shows a first embodiment of a vacuum supply device with an electric motor driven vacuum pump,
Fig. 2 ein zweites Ausführungsbeispiel einer Unterdruckversorgungseinrichtung undFig. 2 shows a second embodiment of a vacuum supply device and
Fig. 3 ein drittes Ausführungsbeispiel einer Unterdruckversorgungseinrichtung mit zusätzlichem Unterdruckreservoir .Fig. 3 shows a third embodiment of a vacuum supply device with additional vacuum reservoir.
Ausführungsbeispieleembodiments
In den Figuren sind gleiche Bauteile und Bauteile gleicher Funktion mit den gleichen Bezugszeichen gekennzeichnet.In the figures, the same components and components have the same function with the same reference numerals.
In Fig. 1 ist eine Unterdruckversorgungseinrichtung 1 gezeigt. Die Unterdruckversorgungseinrichtung 1 umfasst einen mit Unterdruck zu versorgenden Verbraucher 2, welcher in den gezeigten Ausführungsbeispielen als Bremskraftverstärker ausgebildet ist. Der Verbraucher 2 ist Teil einer Bremskraftanlage 3. Der Bremskraftverstärker 2 unterstützt die auf ein Bremspedal 4 aufgebrachte Fußkraft beim Betätigen der Bremskraftanlage und verringert damit den erforderlichen Kraftaufwand.In Fig. 1, a vacuum supply device 1 is shown. The vacuum supply device 1 comprises a consumer to be supplied with negative pressure 2, which is formed in the illustrated embodiments as a brake booster. The consumer 2 is part of a brake system 3. The brake booster 2 supports the force applied to a brake pedal 4 foot force when you press the brake and thus reduces the required effort.
Der von dem Bremskraftverstärker 2 benötigte Unterdruck wird einerseits von einem Verbrennungsmotor 5 in dessen Ansaugtrakt 6 sowie von einer Unterdruckpumpe 7 mit elektrischem Antriebsmotor 8 bereitgestellt. Bei der Unterdruckpumpe 7 handelt es sich um eine trocken laufende Pumpe .The vacuum required by the brake booster 2 is provided on the one hand by an internal combustion engine 5 in its intake tract 6 and by a vacuum pump 7 with an electric drive motor 8. The vacuum pump 7 is a dry-running pump.
Die Unterdruckpumpe 7 ist in Reihe zwischen dem AnsaugtraktThe vacuum pump 7 is in series between the intake
6 des Verbrennungsmotors 5 und dem Bremskraftverstärker 2 angeordnet. Hierzu ist die Saugseite 9 der Unterdruckpumpe6 of the internal combustion engine 5 and the brake booster 2 are arranged. For this purpose, the suction side 9 of the vacuum pump
7 mittels einer ersten Verbindungsleitung 10 mit dem Bremskraftverstärker 2 und die Druckseite 11 der7 by means of a first connecting line 10 with the brake booster 2 and the pressure side 11 of
Unterdruckpumpe 7 über eine zweite Verbindungsleitung 12 mit dem Ansaugtrakt 6 des Verbrennungsmotors 5 verbunden.Vacuum pump 7 is connected via a second connecting line 12 to the intake tract 6 of the internal combustion engine 5.
Die von der Unterdruckpumpe 7 aus dem Bremskraftverstärker 2 angesaugte Luft muss nicht gegen Atmosphärendruck sondern lediglich gegen das Unterdruckniveau im Ansaugtrakt 6 des Verbrennungsmotors 5 gefördert werden. Nimmt man an, dass der Absolutdruck im Ansaugtrakt etwa 330 mbar und der Absolutdruck im Bremskraftverstärker 2 etwa 150 mbar beträgt, so muss die elektromotorisch betriebeneThe sucked by the vacuum pump 7 from the brake booster 2 air must not be promoted against atmospheric pressure but only against the vacuum level in the intake manifold 6 of the engine 5. Assuming that the absolute pressure in the intake tract is about 330 mbar and the absolute pressure in the brake booster 2 is about 150 mbar, the electromotive-operated
Unterdruckpumpe 7 lediglich eine Druckdifferenz Δp = 180 mbar überwinden. Wäre die Druckseite der Unterdruckpumpe 7 unmittelbar mit der Atmosphäre verbunden, müsste die Unterdruckpumpe 7 eine Druckdifferenz von 850 mbar überwinden. Durch die erfindungsgemäße Anordnung derVacuum pump 7 only overcome a pressure difference Δp = 180 mbar. If the pressure side of the vacuum pump 7 were directly connected to the atmosphere, the vacuum pump 7 would have to overcome a pressure difference of 850 mbar. By the inventive arrangement of
Unterdruckpumpe 7 in Reihe zwischen dem Ansaugtrakt 6 und dem Bremskraftverstärker 2 kann somit die Laufzeit der Unterdruckpumpe 7 verkürzt und damit ihre Lebensdauer verlängert werden. Zusätzlich wird der Stromverbrauch im Kraftfahrzeug zur Versorgung der Verbraucher mit Unterdruck reduziert . Weiterhin ist eine Bypassleitung 13 vorgesehen, die die erste Verbindungsleitung 10 und die zweiteVacuum pump 7 in series between the intake manifold 6 and the brake booster 2 can thus shorten the duration of the vacuum pump 7 and thus their life can be extended. In addition, the power consumption in the motor vehicle is reduced to supply the consumers with negative pressure. Furthermore, a bypass line 13 is provided, which is the first connection line 10 and the second
Verbindungsleitung 12 unter Umgehung der Unterdruckpumpe 7 miteinander verbindet. In Betriebssituationen, in denen die Vakuum-Saugleistung des Verbrennungsmotors 5 größer ist als die Vakuum-Saugleistung der Unterdruckpumpe 7 kann die Vakuum-Saugleistung des Verbrennungsmotors 5 über die Bypassleitung 13 ohne eine Drosselung durch die Unterdruckpumpe 7 direkt genutzt werden, um Luft aus dem Bremskraftverstärker 2 abzusaugen.Connecting line 12, bypassing the vacuum pump 7 connects to each other. In operating situations in which the vacuum suction power of the engine 5 is greater than the vacuum suction power of the vacuum pump 7, the vacuum suction power of the engine 5 via the bypass line 13 without throttling by the vacuum pump 7 can be used directly to air from the brake booster 2 to suck off.
Sowohl in der Bypassleitung 13, als auch in der ersten Verbindungsleitung 10 zwischen Unterdruckpumpe 7 und Bremskraftverstärker 2 ist jeweils ein Rückschlagventil 14, 15 angeordnet. Die Rückschlagventile 14, 15 haben die Aufgabe das Unterdruckniveau bei Stillstand von Unterdruckpumpe 7 und/oder Verbrennungsmotor 5 im Bremskraftverstärker 2 zu erhalten.Both in the bypass line 13, as well as in the first connecting line 10 between vacuum pump 7 and brake booster 2, a check valve 14, 15 is arranged in each case. The check valves 14, 15 have the task to maintain the vacuum level at standstill of vacuum pump 7 and / or engine 5 in the brake booster 2.
Zur Steuerung der Unterdruckpumpe 7 bzw. des elektrischen Antriebsmotors 8 der Unterdruckpumpe 7 ist ein Unterdrucksensor 16 vorgesehen, welcher den Druck in der Verbindungsleitung 10 zwischen Rückschlagventil 15 und Bremskraftverstärker 2 misst. Der Unterdrucksensor 16 ist mit einer Regelungs- und/oder Steuerungseinrichtung 17 verbunden, welche unmittelbar steuernd auf den Antriebsmotor 8 einwirkt. Wird ein vorgegebener Absolutdruck im Bremskraftverstärker 2 überschritten, so wird der Antriebsmotor 8 eingeschaltet, wodurch dieTo control the vacuum pump 7 and the electric drive motor 8 of the vacuum pump 7, a vacuum sensor 16 is provided, which measures the pressure in the connecting line 10 between the check valve 15 and the brake booster 2. The vacuum sensor 16 is connected to a control and / or control device 17 which acts directly on the drive motor 8. If a predetermined absolute pressure in the brake booster 2 is exceeded, the drive motor 8 is turned on, whereby the
Unterdruckpumpe 7 Luft aus dem Bremskraftverstärker 2 in den Ansaugtrakt 6 fördert. Der Antriebsmotor 8 wird von der Regelungs- und/oder Steuerungseinrichtung wieder abgeschaltet, wenn ein vorgegebener Absolutdruck, beispielsweise 150 mbar, im Bremskraftverstärker 2 erreicht oder unterschritten wird. Das Ausfuhrungsbeispiel gemäß Fig. 2 entspricht im Wesentlichen dem Ausfuhrungsbeispiel gemäß Fig. 1. Der einzige Unterschied besteht darin, dass das Ruckschlag- ventil 15 unmittelbar benachbart zu der Unterdruckpumpe 7 angeordnet ist. Über das Ruckschlagventil 15 gemäß Fig. 2 wird lediglich ein Einstromen von Luft durch die Unterdruckpumpe 7 in Richtung Bremskraftverstarker 2 verhindert, wohingegen das Ruckschlagventil gemäß Fig. 1 zusatzlich noch die Bypassleitung 13 abdichtet.Vacuum pump 7 promotes air from the brake booster 2 in the intake manifold 6. The drive motor 8 is switched off again by the control and / or control device when a predetermined absolute pressure, for example 150 mbar, is reached or undershot in the brake booster 2. The exemplary embodiment according to FIG. 2 essentially corresponds to the exemplary embodiment according to FIG. 1. The only difference is that the return valve 15 is arranged directly adjacent to the vacuum pump 7. 2, only an inflow of air through the vacuum pump 7 in the direction of brake booster 2 is prevented, whereas the check valve of FIG. 1 additionally seals the bypass line 13.
Bei dem Ausfuhrungsbeispiel gemäß Fig. 3 mundet in die zweite Verbindungsleitung 12 zwischen dem Ansaugtrakt 6 und der Unterdruckpumpe 7 eine Verbindungsleitung zu einem Unterdruckreservoir 18. Dieses dient zur Aufrechterhaltung eines Unterdrucks auf der Druckseite 11 der Unterdruckpumpe 7 bei abgeschaltetem Verbrennungsmotor, beispielsweise in Kraftfahrzeugen mit Hybridantrieb. Zwischen der Verbindungsstelle 19 der Verbindungsleitung zum Unterdruckreservoir 18 mit der zweiten Verbindungsleitung 12 und dem Ansaugtrakt 6 ist ein drittes Ruckschlagventil 20 angeordnet. Ansonsten entspricht die Konfiguration der Unterdruckversorgungseinrichtung gemäß Fig. 3 dem Ausfuhrungsbeispiel gemäß Fig. 2. In the exemplary embodiment according to FIG. 3, a connecting line to a vacuum reservoir 18 extends into the second connecting line 12 between the intake tract 6 and the vacuum pump 7. This serves to maintain a negative pressure on the pressure side 11 of the vacuum pump 7 when the internal combustion engine is switched off, for example in motor vehicles with hybrid drive , Between the junction 19 of the connecting line to the vacuum reservoir 18 with the second connecting line 12 and the intake manifold 6, a third check valve 20 is arranged. Otherwise, the configuration of the vacuum supply device according to FIG. 3 corresponds to the exemplary embodiment according to FIG. 2.

Claims

Ansprüche claims
1. Unterdruckversorgungseinrichtung für mindestens einen Verbraucher (2) in einem Kraftfahrzeug, wobei zur Versorgung des Verbrauchers (2) mit Unterdruck eine Unterdruckquelle (6) und eine Unterdruckpumpe (7) vorgesehen sind, dadurch gekennzeichnet, dass die Saugseite (9) der Unterdruckpumpe (7) mit dem Verbraucher (2) und die Druckseite (11) der Unterdruckpumpe (7) mit der Unterdruckquelle (6) verbunden ist.1. Vacuum supply device for at least one consumer (2) in a motor vehicle, wherein a vacuum source (6) and a vacuum pump (7) are provided for supplying the consumer (2) with negative pressure, characterized in that the suction side (9) of the vacuum pump ( 7) with the consumer (2) and the pressure side (11) of the vacuum pump (7) with the vacuum source (6) is connected.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Unterdruckpumpe (7) eine elektromotorisch betriebene, insbesondere trocken laufende, Pumpe ist.2. Device according to claim 1, characterized in that the vacuum pump (7) is an electric motor operated, in particular dry-running, pump.
3. Einrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass ein mit einer Regelungs- und/oder3. Device according to one of claims 1 or 2, characterized in that one with a regulatory and / or
Steuerungseinrichtung (17) verbundener Unterdrucksensor (16) zur Steuerung der Unterdruckpumpe (7) vorgesehen ist.Control device (17) connected vacuum sensor (16) for controlling the vacuum pump (7) is provided.
4. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Bypassleitung (13) vorgesehen ist, die die Unterdruckquelle (6) unter Umgehung der Unterdruckpumpe (7) mit dem Verbraucher (2) verbindet.4. Device according to one of the preceding claims, characterized in that a bypass line (13) is provided which connects the vacuum source (6), bypassing the vacuum pump (7) with the consumer (2).
5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, dass in der Bypassleitung (13) ein erstes Rückschlagventil (14) angeordnet ist. 5. Device according to claim 4, characterized in that in the bypass line (13) a first check valve (14) is arranged.
6. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Verbindungsleitung (10) zwischen Unterdruckpumpe (7) und Verbraucher (2) ein zweites Rückschlagventil (15).6. Device according to one of the preceding claims, characterized in that in the connecting line (10) between the vacuum pump (7) and consumer (2), a second check valve (15).
7. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verbindungsleitung (12) zwischen Unterdruckpumpe (2) und Unterdruckquelle (6) mit mindestens einem Unterdruckreservoir (18) verbunden ist.7. Device according to one of the preceding claims, characterized in that the connecting line (12) between the vacuum pump (2) and vacuum source (6) with at least one vacuum reservoir (18) is connected.
8. Einrichtung nach Anspruch 7, dadurch gekennzeichnet, dass zwischen dem Unterdruckreservoir (18) und der Unterdruckquelle (6) ein drittes Rückschlagventil (20) angeordnet ist.8. Device according to claim 7, characterized in that between the vacuum reservoir (18) and the vacuum source (6), a third check valve (20) is arranged.
9. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Unterdruckquelle (6) der Ansaugtrakt (6) eines Verbrennungsmotors (5) ist.9. Device according to one of the preceding claims, characterized in that the vacuum source (6) of the intake tract (6) of an internal combustion engine (5).
10. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Verbraucher (2) ein Bremskraftverstärker (6) ist. 10. Device according to one of the preceding claims, characterized in that the consumer (2) is a brake booster (6).
PCT/EP2007/050894 2006-01-31 2007-01-30 Vacuum supply device WO2007088165A1 (en)

Applications Claiming Priority (2)

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DE102006004288.3 2006-01-31
DE102006004288A DE102006004288A1 (en) 2006-01-31 2006-01-31 Low-pressure feeder device for a consumer/power brake in a motor vehicle has a source of low pressure for supplying the consumer with low pressure and a vacuum pump

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008032242B4 (en) * 2008-07-01 2015-03-05 Joma-Polytec Gmbh Device for generating and providing a negative pressure, and ventilation valve
ITBO20090073A1 (en) * 2009-02-13 2010-08-14 Ferrari Spa HYBRID VEHICLE WITH PNEUMATIC BRAKE SERVO
FR2945264B1 (en) * 2009-05-07 2011-04-29 Peugeot Citroen Automobiles Sa BRAKING SYSTEM, IN PARTICULAR FOR MOTOR VEHICLES, COMPRISING A BRAKING AMPLIFIER
DE102011016629B4 (en) * 2011-04-09 2019-01-17 Volkswagen Aktiengesellschaft System comprising an internal combustion engine and a vacuum component operated by a function and method for operating such a system
DE102011085252A1 (en) 2011-10-26 2013-05-02 Robert Bosch Gmbh Method and device for determining a fault condition in a brake booster system
JP2014084055A (en) * 2012-10-26 2014-05-12 Aisan Ind Co Ltd Failure diagnostic device for brake system and failure diagnostic method for brake system
FR3009702B1 (en) * 2013-08-13 2016-12-30 Technoboost MOTOR VEHICLE COMPRISING ELECTRICAL MEANS FOR PRODUCING VACUUM
FR3014392B1 (en) * 2013-12-05 2016-01-01 Peugeot Citroen Automobiles Sa DEVICE FOR MONITORING THE BRAKING ASSISTANCE OF A THERMAL MOTOR VEHICLE BY MULTIPLE DEPRESSION SOURCES
DE102014018944B4 (en) * 2014-12-22 2016-09-15 Henzel Formenbau Gmbh Vacuum device for a pneumatic brake booster
EP3248850B1 (en) * 2016-05-27 2021-09-01 Aqseptence Group GmbH Method for operating a vacuum pump and vacuum pump assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322176A1 (en) * 1983-06-21 1985-01-10 Alfred Dipl.-Ing.(FH) 7257 Ditzingen Wieland Vacuum system for a motor vehicle
EP0439672A1 (en) * 1990-01-31 1991-08-07 VDO Adolf Schindling AG Vacuum supply installation
DE19929880A1 (en) * 1999-06-29 2001-01-04 Bosch Gmbh Robert Producing vacuum in vehicle involves activating pump if measured vacuum near vacuum-operated device falls below threshold and depending on vehicle's drive engine operating state
DE10057728A1 (en) * 1999-12-06 2001-06-07 Luk Automobiltech Gmbh & Co Kg Vacuum pump arrangement to supply low pressure air to a motor vehicle brake booster
DE10001060C1 (en) * 2000-01-13 2001-07-26 Daimler Chrysler Ag Negative pressure creating device for vehicle system has additional fuel vapor retention system on induction side of pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322176A1 (en) * 1983-06-21 1985-01-10 Alfred Dipl.-Ing.(FH) 7257 Ditzingen Wieland Vacuum system for a motor vehicle
EP0439672A1 (en) * 1990-01-31 1991-08-07 VDO Adolf Schindling AG Vacuum supply installation
DE19929880A1 (en) * 1999-06-29 2001-01-04 Bosch Gmbh Robert Producing vacuum in vehicle involves activating pump if measured vacuum near vacuum-operated device falls below threshold and depending on vehicle's drive engine operating state
DE10057728A1 (en) * 1999-12-06 2001-06-07 Luk Automobiltech Gmbh & Co Kg Vacuum pump arrangement to supply low pressure air to a motor vehicle brake booster
DE10001060C1 (en) * 2000-01-13 2001-07-26 Daimler Chrysler Ag Negative pressure creating device for vehicle system has additional fuel vapor retention system on induction side of pump

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