WO2001018361A1 - Internal combustion piston engine with vacuum generation and throttle-free air intake - Google Patents
Internal combustion piston engine with vacuum generation and throttle-free air intake Download PDFInfo
- Publication number
- WO2001018361A1 WO2001018361A1 PCT/EP2000/008505 EP0008505W WO0118361A1 WO 2001018361 A1 WO2001018361 A1 WO 2001018361A1 EP 0008505 W EP0008505 W EP 0008505W WO 0118361 A1 WO0118361 A1 WO 0118361A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- internal combustion
- vacuum pump
- combustion engine
- air intake
- pump
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
- F01M2001/123—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10 using two or more pumps
Definitions
- Tandem solutions by coupling to the power generator, the power steering pump or an existing air conditioning compressor are also possible.
- Air intake tract which is connected to at least one device to be pressurized with vacuum and a drivable oil pump for engine lubrication and in which a vacuum pump is provided which is in drive connection with the oil pump, the vacuum pump being assigned a ventilation system which is associated with the Air intake tract is connected.
- This arrangement has the advantage that the oil supply to the vacuum pump can be carried out directly from the oil pump with little effort.
- the vacuum pump which can be designed, for example, as a vane pump, also offers the advantage that the oil pump has a relatively low speed, which gives it a high degree of efficiency.
- the vacuum pump is arranged coaxially with the oil pump and is directly coupled to it and is thus driven in unison with the oil pump, there is little construction effort, since an additional tap from the drives for other auxiliary units is not required.
- the air released by the vacuum pump can be discharged directly into the crank chamber and from there, if available, can be discharged via the crankcase ventilation. It is particularly expedient to supply the air to the ventilation system via at least one separate duct. This channel can be integrated in the engine block or can be guided in the form of a pipe on the inside or outside of the engine block.
- crankcase is usually vented via a ventilation system with a liquid separator for separating entrained oil droplets, which then opens into the air intake tract, so that the combustible constituents, in particular oil mist, still contained in the air drawn off from the crank chamber and not separated by the separator are fed to the combustion process of the piston internal combustion engine.
- a liquid separator for separating entrained oil droplets, which then opens into the air intake tract, so that the combustible constituents, in particular oil mist, still contained in the air drawn off from the crank chamber and not separated by the separator are fed to the combustion process of the piston internal combustion engine.
- the activated carbon filter of the tank ventilation system must be "backwashed” with fresh air at predeterminable time intervals in order to remove the adsorbed hydrocarbon components from the activated carbon.
- This air which is loaded with hydrocarbons, is then fed via the air intake tract to the combustion process of the piston internal combustion engine.
- the vacuum pump is arranged in the crank chamber together with the oil pump.
- the drawing shows a in the form of a block diagram
- 4-cylinder piston internal combustion engine 1 which is provided with an air intake tract 2 and an exhaust tract 3.
- an oil pump 4 is arranged in the crank chamber of the piston internal combustion engine and is in drive connection with the crankshaft 7 via a shaft bushing 5, for example via a chain drive 6 only indicated schematically.
- a vacuum pump 8 for example a vane pump, is arranged in the crank chamber of the piston internal combustion engine 1 same speed as the oil pump 4 is driven.
- the pump speed should be between 0.5 to 1 times the crankshaft speed.
- the vacuum pump 8 On the suction side, the vacuum pump 8 is connected to a device 9 to be pressurized, which is shown here as a tank vent.
- the tank ventilation consists essentially of an activated carbon filter 12 connected to the fuel tank 10 via a suction line 11, via which the tank clearance is vented into the environment.
- the activated carbon filter 12 is also connected to the vacuum pump 8 via a suction line 13, backwashing of the activated carbon filter 12 being possible via control valves 14.1 and 14.2, which can be controlled via the engine control 15.
- the control valve 14.1 is opened and the control valve 14.2 closed at predeterminable time intervals, so that the activated carbon filter 12 can be subjected to negative pressure and, accordingly, ambient air is sucked in and the load is rinsed with hydrocarbons and discharged with the sucked-in air.
- the vacuum pump 8 On the pressure side, the vacuum pump 8 has a blow-off line 16.
- the blow-off line can open directly into the crank chamber of the piston internal combustion engine 1, so that the air sucked out of the filter and loaded with hydrocarbons can be released into the crank chamber and drawn off via a crankcase ventilation.
- the crankcase ventilation essentially consists of a liquid separator 17, shown only schematically here, through which the entire exhaust air of the engine interior is passed and whose exhaust line 18 opens into the air intake tract 2. So that the hydrocarbon content in the air drawn from the activated carbon filter 12 is also utilized in the combustion process of the piston internal combustion engine. If the activated carbon filter 12 is backwashed only when the engine is warm, the hydrocarbons in the crankcase remain in vapor form and dilution of the lubricating oil is avoided.
- liquid separator 17 is integrated into the engine block in such a way that it is also heated, then condensation phenomena in the separator 17 can also be prevented, so that the oil returned from the separator 17 into the crank chamber is not diluted by the hydrocarbon components, but instead these are supplied to the air intake tract 2 with the exhaust air.
- the blow-off line 16 can also be guided as a separate line to the liquid separator 17.
- a brake booster 19 can be provided as a further device to be pressurized with vacuum, which is connected directly to the suction line 13 and is therefore permanently pressurized with vacuum.
- pumps of a different type can also be used, for example so-called capsule pumps or Roots pumps or piston-diaphragm pumps.
- capsule pumps or Roots pumps or piston-diaphragm pumps are complex and expensive.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
Bezeichnung: Kolbenbrennkraftmaschine mit Unterdruckerzeugung bei drosselfreiem LuftansaugDescription: Piston internal combustion engine with vacuum generation with throttle-free air intake
Beschreibungdescription
Bei Kolbenbrennkraftmaschinen für Fahrzeuge mit drosselfreier Laststeuerung, wie sie beispielsweise bei Kolbenbrennkraftmaschinen mit voll variabel ansteuerbaren Gaswechselventilen möglich ist, besteht das Problem, daß aufgrund des fehlenden Unterdrucks im Luftansaugtrakt für Nebenaggregate, die mit Unterdruck zu beaufschlagen sind, wie beispielsweise Bremskraftverstärker oder Aktivkohlefilter einer Tankentlüftungseinrichtung kein Unterdruck zur Verfügung steht. Es ist daher erforderlich, bei derartigen Kolbenbrennkraftmaschinen zur Erzeugung eines Unterdrucks eine zusätzliche Unterdruckpumpe vorzusehen, die über die Kurbelwelle angetrieben werden muß. Der Antrieb der Unterdruckpumpe kann beispielsweise dadurch erfolgen, daß sie in den Riementrieb für die übrigen Nebenaggregate integriert wird oder aber mit dem freien Ende der Nockenwelle oder der Kurbelwelle unmittelbar verbunden wird.In piston internal combustion engines for vehicles with throttle-free load control, as is possible, for example, in piston internal combustion engines with fully variably controllable gas exchange valves, there is the problem that due to the lack of negative pressure in the air intake tract for auxiliary units, such as brake boosters or activated carbon filters, of a tank ventilation device, none Vacuum is available. It is therefore necessary to provide an additional vacuum pump in such piston internal combustion engines to generate a vacuum, which vacuum pump must be driven via the crankshaft. The vacuum pump can be driven, for example, by integrating it into the belt drive for the other auxiliary units or by connecting it directly to the free end of the camshaft or the crankshaft.
Auch Tandemlösungen durch Ankopplung an den Stromgenerator, an die Lenkhilfepumpe oder an einen etwa vorhandenen Klimakompressor sind möglich.Tandem solutions by coupling to the power generator, the power steering pump or an existing air conditioning compressor are also possible.
Aus DE-A-28 33 167 ist es grundsätzlich bekannt, bei einer Kolbenbrennkraftmaschine die Olpumpe unmittelbar mit einer Vakuumpumpe zu koppeln und hierbei die Vakuumpumpe innerhalb des Motorgehäuses anzuordnen. Die Vakuumpumpe dient nur zur Unterdruckerzeugung an einem Bremskraftverstärker, so daß nur Luft in den Motorraum abgeblasen wird. Das Problem der Motorraumentlüftung ist nicht angesprochen.From DE-A-28 33 167 it is basically known to couple the oil pump directly to a vacuum pump in a piston internal combustion engine and to arrange the vacuum pump within the motor housing. The vacuum pump is only used to generate negative pressure on a brake booster, so that only air is blown into the engine compartment. The problem of engine room ventilation is not addressed.
Neben den Problemen des zusätzlichen Raumbedarfs im Motorraum des Fahrzeugs ergeben sich speziell für die zuletzt genannten Tandemlösungen zusätzlich Probleme hinsichtlich der Ölversorgung und der Unterdruckführung sowie ein schlechter irkungs- grad der Unterdruckpumpe aufgrund der ungünstigen Wellendrehzahl bei einer derartigen Ankopplung an ein anderes Aggregat.In addition to the problems of the additional space required in the engine compartment of the vehicle, there are also problems with the last-mentioned tandem solutions with regard to the oil supply and the vacuum management, as well as a poor response degree of the vacuum pump due to the unfavorable shaft speed with such a coupling to another unit.
Um diese Nachteile zu vermeiden, wird erfindungsgemäß vorge- schlagen eine Kolbenbrennkraftmaschine mit drosselfreiemIn order to avoid these disadvantages, a piston internal combustion engine with a throttle-free one is proposed according to the invention
Luftansaugtrakt, die mit wenigstens einer mit Unterdruck zu beaufschlagenden Einrichtung und einer antreibbaren Olpumpe für die Motorschmierung in Verbindung steht und bei der eine Unterdruckpumpe vorgesehen ist, die mit der Olpumpe in An- triebsverbindung steht, wobei der Unterdruckpumpe ein Entlüftungssystem zugeordnet ist, das mit dem Luftansaugtrakt verbunden ist. Diese Anordnung hat den Vorteil, daß die Ölversorgung der Unterdruckpumpe mit geringem Aufwand direkt aus der Olpumpe erfolgen kann. Die Unterdruckpumpe, die bei- spielsweise als Flügelzellenpumpe ausgebildet sein kann, bietet ferner den Vorteil, daß aufgrund der relativ niedrigen Drehzahl der Olpumpe ein guter Wirkungsgrad gegeben ist. Dadurch, daß erfindungsgemäß die Unterdruckpumpe koaxial zur Olpumpe angeordnet und mit dieser direkt gekoppelt ist und somit gleichlaufend mit der Olpumpe angetrieben wird, ergibt sich ein geringer Bauaufwand, da ein zusätzlicher Abgriff von den Antrieben für andere Nebenaggregate entfällt. Die von der Unterdruckpumpe abgegebene Luft kann unmittelbar in den Kurbelraum abgegeben werden und von dort, sofern vorhanden, über die Kurbelraumentlüftung abgeführt werden. Es ist besonders zweckmäßig, die Luft über wenigstens einen gesonderten Kanal dem Entlüftungssystem zuzuführen. Dieser Kanal kann in den Motorblock integriert sein oder in Form einer Rohrleitung innen oder außen am Motorblock geführt sein. Damit entfällt so- wohl bei einer an der Außenseite der Kolbenbrennkraftmaschine angeordneten Unterdruckpumpe wie auch bei einer entsprechend der vorteilhaften Ausgestaltung im Kurbelraum angeordneten Unterdruckpumpe die Notwendigkeit, die Absaugluft über ein gesondertes Entlüftungssystem zu führen. Üblicherweise wird der Kurbelraum über ein Entlüftungssystem mit einem Flüssigkeitsabscheider zum Abscheiden von mitgerissenen Öltröpfchen entlüftet, der dann in den Luftansaugtrakt ausmündet, so daß die in der aus dem Kurbelraum abgezogenen Luft noch enthaltenen, vom Abscheider nicht abgetrennten brennbaren Bestandteile, insbesondere Ölnebel, dem Verbrennungsprozeß der Kolbenbrennkraftmaschine zugeführt werden. Dies ist besonders vor- teilhaft, wenn entsprechend einer erfindungsgemäßen Ausgestaltung die mit Unterdruck zu beaufschlagende Einrichtung durch den Aktivkohlefilter einer Tankentlüftungsanlage gebildet wird. Der Aktivkohlefilter der Tankentlüftungsanlage muß in vorgebbaren Zeitabständen mit Frischluft "rückgespült" werden, um die adsorbierten Kohlenwasserstoffanteile aus der Aktivkohle zu entfernen. Diese mit Kohlenwasserstoffen bela- dene Luft wird dann über den Luftansaugtrakt dem Verbrennungsprozeß der Kolbenbrennkraftmaschine zugeführt.Air intake tract which is connected to at least one device to be pressurized with vacuum and a drivable oil pump for engine lubrication and in which a vacuum pump is provided which is in drive connection with the oil pump, the vacuum pump being assigned a ventilation system which is associated with the Air intake tract is connected. This arrangement has the advantage that the oil supply to the vacuum pump can be carried out directly from the oil pump with little effort. The vacuum pump, which can be designed, for example, as a vane pump, also offers the advantage that the oil pump has a relatively low speed, which gives it a high degree of efficiency. The fact that, according to the invention, the vacuum pump is arranged coaxially with the oil pump and is directly coupled to it and is thus driven in unison with the oil pump, there is little construction effort, since an additional tap from the drives for other auxiliary units is not required. The air released by the vacuum pump can be discharged directly into the crank chamber and from there, if available, can be discharged via the crankcase ventilation. It is particularly expedient to supply the air to the ventilation system via at least one separate duct. This channel can be integrated in the engine block or can be guided in the form of a pipe on the inside or outside of the engine block. With a vacuum pump arranged on the outside of the piston internal combustion engine as well as with a vacuum pump arranged in the crank chamber in accordance with the advantageous embodiment, there is thus no need to conduct the exhaust air via a separate ventilation system. The crankcase is usually vented via a ventilation system with a liquid separator for separating entrained oil droplets, which then opens into the air intake tract, so that the combustible constituents, in particular oil mist, still contained in the air drawn off from the crank chamber and not separated by the separator are fed to the combustion process of the piston internal combustion engine. This is particularly advantageous if, in accordance with an embodiment according to the invention, the device to be subjected to negative pressure is formed by the activated carbon filter of a tank ventilation system. The activated carbon filter of the tank ventilation system must be "backwashed" with fresh air at predeterminable time intervals in order to remove the adsorbed hydrocarbon components from the activated carbon. This air, which is loaded with hydrocarbons, is then fed via the air intake tract to the combustion process of the piston internal combustion engine.
In besondere vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß die Unterdruckpumpe zusammen mit der Olpumpe im Kurbelraum angeordnet ist. Durch die Ausnutzung des im Kurbelraum ohnehin zur Verfügung stehenden Raumvolumens entfällt für die Anordnung der Unterdruckpumpe ein zusätzlicher Raumbedarf.In a particularly advantageous embodiment of the invention, it is provided that the vacuum pump is arranged in the crank chamber together with the oil pump. By utilizing the space available in the crankcase anyway, there is no additional space requirement for the arrangement of the vacuum pump.
Die Erfindung wird anhand einer schematischen Zeichnung eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail using a schematic drawing of an embodiment.
Die Zeichnung zeigt in Form eines Blockschaltbildes eineThe drawing shows a in the form of a block diagram
4-Zyliner-Kolbenbrennkraftmaschine 1, die mit einem Luftsansaugtrakt 2 und einem Abgastrakt 3 versehen ist.4-cylinder piston internal combustion engine 1, which is provided with an air intake tract 2 and an exhaust tract 3.
Wie hier nur schematisch angedeutet, ist im Kurbelraum der Kolbenbrennkraftmaschine eine Olpumpe 4 angeordnet, die über eine Wellendurchführung 5, beispielweise über einen nur schematisch angedeuteten Kettentrieb 6 mit der Kurbelwelle 7 in Antriebsverbindung steht.As indicated only schematically here, an oil pump 4 is arranged in the crank chamber of the piston internal combustion engine and is in drive connection with the crankshaft 7 via a shaft bushing 5, for example via a chain drive 6 only indicated schematically.
Gleichachsig und drehfest mit der Olpumpe 4 ist im Kurbelraum der Kolbenbrennkraftmaschine 1 eine Unterdruckpumpe 8, beispielsweise eine Flügelzellenpumpe angeordnet, die mit der gleichen Drehzahl wir die Olpumpe 4 angetrieben wird. Die Pumpendrehzahl sollte etwa zwischen dem 0,5 bis 1-fachen der Kurbelwellendrehzahl liegen.Coaxial and non-rotatable with the oil pump 4, a vacuum pump 8, for example a vane pump, is arranged in the crank chamber of the piston internal combustion engine 1 same speed as the oil pump 4 is driven. The pump speed should be between 0.5 to 1 times the crankshaft speed.
Saugseitig steht die Unterdruckpumpe 8 mit einer Unterdruck zu beaufschlagenden Einrichtung 9 in Verbindung, die hier als Tankentlüftung dargestellt ist. Die Tankentlüftung besteht hierbei im wesentlichen aus einem mit dem Kraftstofftank 10 über eine Saugleitung 11 verbundenen Aktivkohlefilter 12, über den der Tankfreiraum in die Umgebung entlüftet wird.On the suction side, the vacuum pump 8 is connected to a device 9 to be pressurized, which is shown here as a tank vent. The tank ventilation consists essentially of an activated carbon filter 12 connected to the fuel tank 10 via a suction line 11, via which the tank clearance is vented into the environment.
Der Aktivkohlefilter 12 steht ferner über eine Saugleitung 13 mit der Unterdruckpumpe 8 in Verbindung, wobei über Stellventile 14.1 und 14.2, die über die Motorsteuerung 15 ansteuer- bar sind, eine Rückspülung des Aktivkohlefilters 12 möglich ist. In vorgebbaren Zeitabständen wird das Stellventil 14.1 geöffnet und das Stellventil 14.2 geschlossen, so daß der Aktivkohlefilter 12 mit Unterdruck beaufschlagt werden kann und dementsprechend Umgebungsluft angesaugt und die Beladung mit Kohlewasserstoffen abgespült und mit der angesaugten Luft abgeführt wird.The activated carbon filter 12 is also connected to the vacuum pump 8 via a suction line 13, backwashing of the activated carbon filter 12 being possible via control valves 14.1 and 14.2, which can be controlled via the engine control 15. The control valve 14.1 is opened and the control valve 14.2 closed at predeterminable time intervals, so that the activated carbon filter 12 can be subjected to negative pressure and, accordingly, ambient air is sucked in and the load is rinsed with hydrocarbons and discharged with the sucked-in air.
Druckseitig weist die Unterdruckpumpe 8 eine Abblasleitung 16 auf. Die Abblasleitung kann unmittelbar in den Kurbelraum der Kolbenbrennkraftmaschine 1 mündet, so daß die aus dem Filter abgesaugte, mit Kohlenwasserstoffen beladene Luft in den Kurbelraum abgegeben und über eine Kurbelraumentlüftung abgezogen werden kann.On the pressure side, the vacuum pump 8 has a blow-off line 16. The blow-off line can open directly into the crank chamber of the piston internal combustion engine 1, so that the air sucked out of the filter and loaded with hydrocarbons can be released into the crank chamber and drawn off via a crankcase ventilation.
Die Kurbelraumentlüftung besteht im wesentlichen aus einem hier nur schematisch dargestellten Flüssigkeitsabscheider 17, durch den die gesamte Abluft des Motorinnenraums hindurchgeführt wird und dessen Abzugsleitung 18 in den Luftansaugtrakt 2 einmündet. Damit wir der Gehalt an Kohlenwasserstoffen in der aus dem Aktivkohlefilter 12 abgezogenen Luft im Verbrennungsprozeß der Kolbenbrennkraftmaschine mit verwertet. Wird die Rückspülung des Aktivkohlefilters 12 nur bei betriebswarmem Motor vorgenommen, dann bleiben die Kohlenwasserstoffe im Kurbelraum in Dampfform erhalten und eine Verdünnung des Schmieröls wird vermieden. Wird der Flüssigkeits- abscheider 17 in den Motorblock so integriert, daß er ebenfalls erwärmt ist, dann können Kondensationserscheinungen im Abscheider 17 ebenfalls unterbunden werden, so daß auch das aus dem Abscheider 17 in den Kurbelraum zurückgeführte Öl durch die Kohlenwasserstoffanteile nicht verdünnt wird son- dern diese mit der Abluft dem Luftansaugtrakt 2 zugeführt werden.The crankcase ventilation essentially consists of a liquid separator 17, shown only schematically here, through which the entire exhaust air of the engine interior is passed and whose exhaust line 18 opens into the air intake tract 2. So that the hydrocarbon content in the air drawn from the activated carbon filter 12 is also utilized in the combustion process of the piston internal combustion engine. If the activated carbon filter 12 is backwashed only when the engine is warm, the hydrocarbons in the crankcase remain in vapor form and dilution of the lubricating oil is avoided. If the liquid separator 17 is integrated into the engine block in such a way that it is also heated, then condensation phenomena in the separator 17 can also be prevented, so that the oil returned from the separator 17 into the crank chamber is not diluted by the hydrocarbon components, but instead these are supplied to the air intake tract 2 with the exhaust air.
Die Abblasleitung 16 kann aber auch als gesonderte Leitung zum Flüssigkeitsabscheider 17 geführt werden.The blow-off line 16 can also be guided as a separate line to the liquid separator 17.
Anstatt einer Tankentlüftungseinrichtung oder zusätzlich zu einer Tankentlüftungseinrichtung kann als weitere mit Unterdruck zu beaufschlagende Einrichtung ein Bremskraftverstärker 19 vorgesehen sein, der unmittelbar mit der Saugleitung 13 verbunden ist und damit auf Dauer mit Unterdruck beaufschlagt wird.Instead of a tank ventilation device or in addition to a tank ventilation device, a brake booster 19 can be provided as a further device to be pressurized with vacuum, which is connected directly to the suction line 13 and is therefore permanently pressurized with vacuum.
Statt der als Ausführungsbeispiel angegebenen Flügelzellenpumpe können auch Pumpen anderer Bauart eingesetzt werden, so beispielsweise sogenannte Kapselpumpen bzw. Roots-Pumpen oder auch Kolben-Membran-Pumpen Letztere sind jedoch bauaufwendig und teuer. Instead of the vane cell pump specified as an exemplary embodiment, pumps of a different type can also be used, for example so-called capsule pumps or Roots pumps or piston-diaphragm pumps. The latter, however, are complex and expensive.
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00960567A EP1129274A1 (en) | 1999-09-03 | 2000-08-31 | Internal combustion piston engine with vacuum generation and throttle-free air intake |
| JP2001521875A JP2003508675A (en) | 1999-09-03 | 2000-08-31 | Piston-type internal combustion engine equipped with a negative pressure generator that sucks air without throttling |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19942011.4 | 1999-09-03 | ||
| DE1999142011 DE19942011A1 (en) | 1999-09-03 | 1999-09-03 | Piston engine with negative pressure generation with throttle-free air intake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001018361A1 true WO2001018361A1 (en) | 2001-03-15 |
Family
ID=7920665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/008505 Ceased WO2001018361A1 (en) | 1999-09-03 | 2000-08-31 | Internal combustion piston engine with vacuum generation and throttle-free air intake |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1129274A1 (en) |
| JP (1) | JP2003508675A (en) |
| DE (1) | DE19942011A1 (en) |
| WO (1) | WO2001018361A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10241302B4 (en) * | 2002-09-04 | 2005-02-10 | Carl Freudenberg Kg | Method and device for venting an internal combustion engine |
| DE102008052763B4 (en) * | 2008-10-22 | 2017-03-30 | Bayerische Motoren Werke Aktiengesellschaft | Tank ventilation device for a motor vehicle |
| DE102009049024B4 (en) | 2009-10-10 | 2018-03-08 | Bayerische Motoren Werke Aktiengesellschaft | Process for extracting gases from a tank ventilation system |
| JP6111697B2 (en) | 2013-01-30 | 2017-04-12 | スズキ株式会社 | Engine negative pressure supply device |
| DE102014224750B4 (en) * | 2014-06-18 | 2017-03-02 | Magna Powertrain Bad Homburg GmbH | Vacuum system for an internal combustion engine and method of operating the same |
| DE102015222977A1 (en) | 2015-11-20 | 2017-05-24 | Robert Bosch Gmbh | Provision of vacuum for tank ventilation or brake booster |
| DE102019110952A1 (en) * | 2019-04-29 | 2020-10-29 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Air supply system |
| CN116026533B (en) * | 2023-03-28 | 2023-09-05 | 苏州恩都法汽车系统股份有限公司 | Diagnostic system and diagnostic method |
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|---|---|---|---|---|
| US2737341A (en) * | 1950-02-25 | 1956-03-06 | Trico Products Corp | Rotary pump |
| DE2833167A1 (en) | 1978-07-28 | 1980-02-14 | Barmag Barmer Maschf | CONSTRUCTION UNIT CONSTRUCTING AN OIL PUMP FOR LUBRICATING OIL CIRCUIT FOR AN INTERNAL COMBUSTION ENGINE AND A VACUUM PUMP FOR GENERATING A VACUUM FOR THE BRAKE POWER REINFORCEMENT IN MOTOR VEHICLES |
| EP0059086A1 (en) * | 1981-02-19 | 1982-09-01 | Wabco Automotive U.K. Limited | Ancillary rotary equipment for engines |
| US4497618A (en) * | 1983-09-12 | 1985-02-05 | General Motors Corporation | Combined vacuum pump and power steering pump assembly |
| DE3506433A1 (en) * | 1984-03-07 | 1985-10-03 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Assembly comprising a vane vacuum pump and a booster pump |
| DE3637229A1 (en) * | 1985-11-13 | 1987-06-04 | Barmag Barmer Maschf | Structural unit consisting of a hydraulic pump and a vacuum pump |
| GB2317649A (en) * | 1995-04-12 | 1998-04-01 | Bosch Gmbh Robert | Positive displacement fuel delivery pump combined with vacuum pump |
-
1999
- 1999-09-03 DE DE1999142011 patent/DE19942011A1/en not_active Withdrawn
-
2000
- 2000-08-31 EP EP00960567A patent/EP1129274A1/en not_active Withdrawn
- 2000-08-31 WO PCT/EP2000/008505 patent/WO2001018361A1/en not_active Ceased
- 2000-08-31 JP JP2001521875A patent/JP2003508675A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2737341A (en) * | 1950-02-25 | 1956-03-06 | Trico Products Corp | Rotary pump |
| DE2833167A1 (en) | 1978-07-28 | 1980-02-14 | Barmag Barmer Maschf | CONSTRUCTION UNIT CONSTRUCTING AN OIL PUMP FOR LUBRICATING OIL CIRCUIT FOR AN INTERNAL COMBUSTION ENGINE AND A VACUUM PUMP FOR GENERATING A VACUUM FOR THE BRAKE POWER REINFORCEMENT IN MOTOR VEHICLES |
| EP0059086A1 (en) * | 1981-02-19 | 1982-09-01 | Wabco Automotive U.K. Limited | Ancillary rotary equipment for engines |
| US4497618A (en) * | 1983-09-12 | 1985-02-05 | General Motors Corporation | Combined vacuum pump and power steering pump assembly |
| DE3506433A1 (en) * | 1984-03-07 | 1985-10-03 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Assembly comprising a vane vacuum pump and a booster pump |
| DE3637229A1 (en) * | 1985-11-13 | 1987-06-04 | Barmag Barmer Maschf | Structural unit consisting of a hydraulic pump and a vacuum pump |
| GB2317649A (en) * | 1995-04-12 | 1998-04-01 | Bosch Gmbh Robert | Positive displacement fuel delivery pump combined with vacuum pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003508675A (en) | 2003-03-04 |
| DE19942011A1 (en) | 2001-03-08 |
| EP1129274A1 (en) | 2001-09-05 |
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