DE102012203576A1 - Powertrain of motor vehicle has low pressure pump for low pressure brake booster drivable connected with motor operable electric machine - Google Patents
Powertrain of motor vehicle has low pressure pump for low pressure brake booster drivable connected with motor operable electric machine Download PDFInfo
- Publication number
- DE102012203576A1 DE102012203576A1 DE201210203576 DE102012203576A DE102012203576A1 DE 102012203576 A1 DE102012203576 A1 DE 102012203576A1 DE 201210203576 DE201210203576 DE 201210203576 DE 102012203576 A DE102012203576 A DE 102012203576A DE 102012203576 A1 DE102012203576 A1 DE 102012203576A1
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- DE
- Germany
- Prior art keywords
- electric machine
- powertrain
- combustion engine
- internal combustion
- low pressure
- 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.)
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K25/00—Auxiliary drives
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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
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K25/00—Auxiliary drives
- B60K2025/005—Auxiliary drives driven by electric motors forming part of the propulsion unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K25/00—Auxiliary drives
- B60K25/02—Auxiliary drives directly from an engine shaft
- B60K2025/022—Auxiliary drives directly from an engine shaft by a mechanical transmission
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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)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen Antriebsstrang eines Kraftfahrzeugs und Verfahren zum Antreiben einer Unterdruckpumpe für einen Bremskraftverstärker.The present invention relates to a powertrain of a motor vehicle and method for driving a vacuum pump for a brake booster.
Stand der TechnikState of the art
Die Erfindung befasst sich mit der Bremskraftverstärkung durch Unterdruck in Kraftfahrzeugen, insbesondere PKW. Bei dieser Art von Bremskraftverstärkung kann der nötige Unterdruck am Saugrohr hinter der Drosselklappe abgegriffen oder durch eine Unterdruckpumpe erzeugt werden. Die Unterdruckpumpen können vom Verbrennungsmotor des Kraftfahrzeugs angetrieben werden. The invention is concerned with the brake force boost by negative pressure in motor vehicles, especially cars. In this type of brake booster the necessary vacuum can be tapped on the intake manifold behind the throttle or generated by a vacuum pump. The vacuum pumps can be driven by the internal combustion engine of the motor vehicle.
In modernen Kraftfahrzeugen sind Start/Stopp-Betriebsarten verbreitet, bei denen die Brennkraftmaschine in bestimmten Betriebssituationen abgestellt und später wieder angelassen werden soll. Beispielsweise kann die Brennkraftmaschine bei Stillstand des Fahrzeugs, beispielsweise an einer Ampel, oder auch bei Bergabfahrten abgestellt und bei Betätigung der Kupplung oder des Gaspedals wieder angelassen werden. Wird die Unterdruckpumpe für den Bremskraftverstärker von dem Verbrennungsmotor angetrieben, muss der Verbrennungsmotor wiederangelassen werden, wenn der Unterdruck ansteigt, obwohl der Verbrennungsmotor für den Vortrieb nicht benötigt wird. Dies ist unwirtschaftlich.In modern motor vehicles start / stop modes are common in which the engine should be turned off in certain operating situations and later restarted. For example, the engine can be turned off when the vehicle is at a standstill, for example at a traffic light, or when driving downhill and be started again when the clutch or accelerator pedal is actuated. When the vacuum pump for the brake booster is driven by the engine, the engine must be restarted when the negative pressure increases, although the engine is not needed for propulsion. This is uneconomical.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß werden ein Antriebsstrang eines Kraftfahrzeugs und ein Verfahren zum Antreiben einer Unterdruckpumpe für einen Bremskraftverstärker mit den Merkmalen der unabhängigen Patentansprüche vorgeschlagen. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche sowie der nachfolgenden Beschreibung.According to the invention, a drive train of a motor vehicle and a method for driving a vacuum pump for a brake booster with the features of the independent claims are proposed. Advantageous embodiments are the subject of the dependent claims and the following description.
Vorteile der ErfindungAdvantages of the invention
Die Erfindung verbessert den Betrieb und die Wirtschaftlichkeit von Unterdruckpumpen für Bremskraftverstärker, indem diese bei Stillstand des Verbrennungsmotors von einer elektrischen Maschine (insbesondere einer Permanentmagnet-Synchronmaschine) angetrieben werden. Die elektrische Maschine ist mittels einer betätigbaren Kupplung mit der Kurbelwelle des Verbrennungsmotors verbunden, so dass ein Drehmomentschluss zwischen elektrischer Maschine und Verbrennungsmotor nach Belieben hergestellt oder getrennt werden kann. Infolgedessen bietet ein solcher Antriebsstrang vielfältige vorteilhafte Möglichkeiten des Betriebs. Die Erfindung verknüpft in vorteilhafter Weise Elemente des Fahrbetriebs mit Elementen der Bremskraftverstärkung. The invention improves the operation and the economy of vacuum pumps for brake booster by these are driven at standstill of the internal combustion engine by an electric machine (in particular a permanent magnet synchronous machine). The electric machine is connected by means of an actuatable clutch with the crankshaft of the internal combustion engine, so that a torque lock between the electric machine and the internal combustion engine can be made or separated at will. As a result, such a powertrain offers a variety of advantageous ways of operating. The invention advantageously combines elements of the driving operation with elements of the brake booster.
Bei geöffneter Kupplung kann die Unterdruckpumpe von der elektrischen Maschine als Motor unabhängig vom Betriebszustand des Verbrennungsmotors angetrieben werden (Stillstand, Rollen, Bergabrollen). Bei geschlossener Kupplung wird die Unterdruckpumpe von dem sich drehenden Verbrennungsmotor (befeuerter Normalbetrieb oder unbefeuerter Schubbetrieb) angetrieben. Die elektrische Maschine kann hierbei ausgeschaltet sein (herkömmliches Fahren), generatorisch betrieben werden (z.B. Lastpunktanhebung, Lichtmaschinenbetrieb) oder auch motorisch betrieben werden (z.B. Boostbetrieb). Für den motorischen Betrieb der elektrischen Maschine ist ein Energiespeicher, wie z.B. eine Fahrzeugbatterie, vorhanden. When the clutch is open, the vacuum pump can be driven by the electric machine as a motor, regardless of the operating state of the internal combustion engine (standstill, rolling, rolling downhill). When the clutch is closed, the vacuum pump is driven by the rotating internal combustion engine (fired normal operation or unfired overrun operation). The electric machine may in this case be switched off (conventional driving), operated as a generator (for example, load point raising, alternator operation) or else operated by a motor (for example, boost mode). For the motor operation of the electric machine is an energy storage, such. a vehicle battery, available.
Insbesondere in modernen Hybrid- oder Rekuperationssystemen oder bei Startergeneratoren ist eine solche elektrische Maschine ohnehin vorhanden, so dass besondere Vorteile erzielt werden, da keine zusätzlichen Elektromotoren nötig sind. Lediglich das Vorsehen einer zusätzlichen Kupplung kann notwendig sein.In particular, in modern hybrid or Rekuperationssystemen or starter generators such an electric machine is available anyway, so that special advantages are achieved because no additional electric motors are needed. Only the provision of an additional clutch may be necessary.
Elektrische Maschinen werden als Startergeneratoren eingesetzt, um einerseits den Verbrennungsmotor im Motorbetrieb der elektrischen Maschine zu starten ("anzulassen") und andererseits Strom für das Bordnetz und zum Laden der Kraftfahrzeugbatterie im Generatorbetrieb der elektrischen Maschine zu erzeugen. Elektrische Maschinen, die auch zum Fahrzeug-Antrieb eingesetzt werden, (z.B. sog. "Booster") sind aus dem Bereich der Hybrid-Fahrzeuge bekannt. Ein Ziel hierbei ist, den Verbrennungsmotor bei niedrigen Drehzahlen, bei denen dieser noch nicht sein volles Drehmoment liefert, zu unterstützen (sog. Boostbetrieb, Turboloch-Kompensation). Mit dem Begriff "Rekuperationssystem" werden Systeme bezeichnet, bei denen eine elektrische Maschine als Generator mit möglichst großem Drehmoment betrieben wird, um das Fahrzeug abzubremsen und die dabei rückgewonnene Bremsenergie zwischenzuspeichern. Electrical machines are used as starter generators, on the one hand to start ("start up") the internal combustion engine during engine operation of the electric machine and, on the other hand, to generate electricity for the vehicle electrical system and for charging the motor vehicle battery during generator operation of the electric machine. Electric machines which are also used for vehicle propulsion (for example so-called "boosters") are known from the field of hybrid vehicles. One goal here is to support the engine at low speeds at which it does not yet deliver its full torque (so-called boost mode, turbo lag compensation). The term "recuperation system" refers to systems in which an electric machine is operated as a generator with the greatest possible torque in order to decelerate the vehicle and to buffer the braking energy recovered in the process.
Die Verbindung zwischen Kurbelwelle und elektrischer Maschine einerseits sowie zwischen elektrischer Maschine und Unterdruckpumpe andererseits kann direkt oder über eine Getriebe (Riemen, Zahnräder usw.) sein.The connection between crankshaft and electric machine on the one hand and between the electric machine and vacuum pump on the other hand can be directly or via a transmission (belts, gears, etc.).
Die Erfindung ermöglicht, den Verbrennungsmotor in Betriebssituationen, in denen er für den Vortrieb nicht benötigt wird, unbefeuert zu lassen, so dass dessen Verlustleistung vermieden und der Kraftstoffverbrauch reduziert wird. The invention makes it possible to leave the internal combustion engine unfired in operating situations in which it is not needed for the propulsion, so that its power loss is avoided and the fuel consumption is reduced.
Eine erfindungsgemäße Recheneinheit, z.B. ein Steuergerät eines Kraftfahrzeugs, ist, insbesondere programmtechnisch, dazu eingerichtet, ein erfindungsgemäßes Verfahren durchzuführen.An arithmetic unit according to the invention, e.g. a control device of a motor vehicle is, in particular programmatically, configured to perform a method according to the invention.
Auch die Implementierung des Verfahrens in Form von Software ist vorteilhaft, da dies besonders geringe Kosten verursacht, insbesondere wenn ein ausführendes Steuergerät noch für weitere Aufgaben genutzt wird und daher ohnehin vorhanden ist. Geeignete Datenträger zur Bereitstellung des Computerprogramms sind insbesondere Disketten, Festplatten, Flash-Speicher, EEPROMs, CD-ROMs, DVDs u.a.m. Auch ein Download eines Programms über Computernetze (Internet, Intranet usw.) ist möglich.The implementation of the method in the form of software is also advantageous, since this causes particularly low costs, in particular if an executing control device is still used for further tasks and therefore exists anyway. Suitable data carriers for providing the computer program are, in particular, floppy disks, hard disks, flash memories, EEPROMs, CD-ROMs, DVDs and the like. It is also possible to download a program via computer networks (Internet, intranet, etc.).
Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der Beschreibung und der beiliegenden Zeichnung.Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.
Es versteht sich, dass die vorstehend genannten und die nachfolgend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen. It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.
Die Erfindung ist anhand eines Ausführungsbeispiels in der Zeichnung schematisch dargestellt und wird im Folgenden unter Bezugnahme auf die Zeichnung ausführlich beschrieben.The invention is illustrated schematically with reference to an embodiment in the drawing and will be described in detail below with reference to the drawing.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
In
Die Kupplung ist mit einer elektrischen Maschine
Die Ausgangswelle
Beim normalen motorischen Betrieb des Verbrennungsmotors
Wird eine Vortriebsleistung des Verbrennungsmotors
Bei der elektrischen Maschine handelt es sich vorzugsweise um eine ohnehin im betreffenden Kraftfahrzeug vorhandene Maschine, wie z.B. einen Startergenerator oder eine elektrische Maschine eines Hybrid- oder Rekuperationssystems. The electric machine is preferably a machine already present in the relevant motor vehicle, such as e.g. a starter generator or an electric machine of a hybrid or Rekuperationssystems.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210203576 DE102012203576A1 (en) | 2012-03-07 | 2012-03-07 | Powertrain of motor vehicle has low pressure pump for low pressure brake booster drivable connected with motor operable electric machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE201210203576 DE102012203576A1 (en) | 2012-03-07 | 2012-03-07 | Powertrain of motor vehicle has low pressure pump for low pressure brake booster drivable connected with motor operable electric machine |
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DE102012203576A1 true DE102012203576A1 (en) | 2013-03-21 |
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DE201210203576 Ceased DE102012203576A1 (en) | 2012-03-07 | 2012-03-07 | Powertrain of motor vehicle has low pressure pump for low pressure brake booster drivable connected with motor operable electric machine |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2522261A (en) * | 2014-01-20 | 2015-07-22 | Mira Ltd | A power unit and a vehicle |
DE102020118924A1 (en) | 2020-07-17 | 2022-01-20 | Audi Aktiengesellschaft | Hybrid motor vehicle and method of operating a hybrid motor vehicle |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10036504A1 (en) * | 1999-08-02 | 2001-02-08 | Luk Lamellen & Kupplungsbau | Drive path, especially for motor vehicle with combustion engine, having at least one auxiliary aggregate connected concisely with, or forming, energy conversion machine |
-
2012
- 2012-03-07 DE DE201210203576 patent/DE102012203576A1/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10036504A1 (en) * | 1999-08-02 | 2001-02-08 | Luk Lamellen & Kupplungsbau | Drive path, especially for motor vehicle with combustion engine, having at least one auxiliary aggregate connected concisely with, or forming, energy conversion machine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2522261A (en) * | 2014-01-20 | 2015-07-22 | Mira Ltd | A power unit and a vehicle |
GB2522261B (en) * | 2014-01-20 | 2020-06-17 | Mira Ltd | A power unit and a vehicle |
DE102020118924A1 (en) | 2020-07-17 | 2022-01-20 | Audi Aktiengesellschaft | Hybrid motor vehicle and method of operating a hybrid motor vehicle |
US11345333B2 (en) | 2020-07-17 | 2022-05-31 | Audi Ag | Hybrid motor vehicle and method for operating a hybrid motor vehicle |
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Effective date: 20140225 |