DE10239879A1 - Air resistance/drag reduction method for a motor vehicle uses a ventilator for cooling an internal combustion engine by feeding a stream of surrounding air into the vehicle engine area - Google Patents
Air resistance/drag reduction method for a motor vehicle uses a ventilator for cooling an internal combustion engine by feeding a stream of surrounding air into the vehicle engine area Download PDFInfo
- Publication number
- DE10239879A1 DE10239879A1 DE2002139879 DE10239879A DE10239879A1 DE 10239879 A1 DE10239879 A1 DE 10239879A1 DE 2002139879 DE2002139879 DE 2002139879 DE 10239879 A DE10239879 A DE 10239879A DE 10239879 A1 DE10239879 A1 DE 10239879A1
- Authority
- DE
- Germany
- Prior art keywords
- fan
- vehicle
- internal combustion
- combustion engine
- air
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
- F01P5/043—Pump reversing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Reduzierung des Luftwiderstands eines Kraftfahrzeugs nach dem Oberbegriff des Patentanspruchs 1, sowie auf eine zur Durchführung des Verfahrens besonders geeignete Vorrichtung.The invention relates to a Method for reducing the air resistance of a motor vehicle according to the preamble of claim 1, as well as to implement the Device particularly suitable for the method.
Aus der
Die
Aufgabe der Erfindung ist, ein Verfahren eingangs genannter Art derart zu verbessern, dass der cw-Wert eines Kraftfahrzeugs auf einfache Weise optimiert wird.The object of the invention is to improve a method of the type mentioned at the outset in such a way that the c w value of a motor vehicle is optimized in a simple manner.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren gemäß Anspruch 1 gelöst. Vorteilhafte Weiterbildungen sind die Gegenstände der abhängigen Ansprüche, wobei weiterhin eine bevorzugte zur Durchführung des Verfahrens geeignete Vorrichtung angegeben ist.This object is achieved by a Method according to claim 1 solved. Advantageous further developments are the subject of the dependent claims, wherein furthermore a preferred one suitable for carrying out the method Device is specified.
Erfindungsgemäß wird ein Lüfter, der insbesondere zur Kühlung einer Brennkraftmaschine durch Förderung eines Luftstroms aus der Umgebung in den Fahrzeug-Motorraum vorgesehen ist, derart angesteuert, dass bei hohen Fahrzeuggeschwindigkeiten (also wenn die Fahrzeuggeschwindigkeit einen vorgegebenen Grenzwert überschreitet) und ggf. in Abhängigkeit von zumindest einer weiteren Randbedingung der aus der Umgebung in den Fahrzeug-Motorraum eintretende Luftmassestrom reduziert wird. Es ist nämlich erkannt worden, dass bei hohen Fahrzeuggeschwindigkeiten es nicht notwendig ist, den Lüfter für die Kühlung dauernd im Betrieb zu haben. Die erfindungsgemäße Steuerung des Lüfters wird bspw. mittels eines ohnehin vorhandenen Brennkraftmaschinen-Steuergeräts durchgeführt, in dem die Fahrzeuggeschwindigkeit und weitere Randbedingungen üblicherweise bereits als digitale Information vorliegen.According to the invention, a fan that especially for cooling an internal combustion engine through funding an air flow from the environment in the vehicle engine compartment is controlled in such a way that at high vehicle speeds (i.e. if the vehicle speed exceeds a predetermined limit) and possibly depending of at least one other constraint from the environment Air mass flow entering the vehicle engine compartment is reduced. Because it is been recognized that at high vehicle speeds it didn't is necessary the fan for the cooling to be in permanent operation. The control of the fan according to the invention is carried out, for example, by means of an internal combustion engine control unit, which is present anyway which the vehicle speed and other boundary conditions usually already exist as digital information.
Vorzugsweise kann der Lüfter in Abhängigkeit der Fahrzeuggeschwindigkeit und zuminderst einer weiteren Randbedingung, bei der es sich um die Kühlwassertemperatur und/oder den Lastzustand der Brennkraftstoffmaschine handeln kann, erfindungsgemäß angesteuert werden.The fan can preferably be in dependence the vehicle speed and at least one other constraint, which is the cooling water temperature and / or the load state of the fuel machine can act, controlled according to the invention become.
Beispielsweise kann die Drehrichtung des Lüfters bei hohen Fahrzeuggeschwindigkeiten umgekehrt werden. Dadurch reduziert sich der Luftstrom , der durch den Lüfter in den Fahrzeug-Motorraum gelangt. Die in die Gegenrichtung rotierenden Lüfterblätter wirken wie eine geschlossene Kühlerjalousie. Der Luftwiderstand des Fahrzeugs reduziert sich.For example, the direction of rotation of the fan be reversed at high vehicle speeds. This reduces the air flow through the fan into the vehicle engine compartment arrives. The fan blades rotating in the opposite direction act like a closed one Radiator shutter. The Air resistance of the vehicle is reduced.
Vorzugsweise kann der Lüfter, der insbesondere zur Kühlung einer Brennkraftmaschine vorgesehen ist, fallweise auch bei hohen Fahrzeuggeschwindigkeiten arretiert werden. Beim Abschalten des Lüfters verhalten sich die Kühlerblätter des Lüfters in etwa ähnlich wie eine Kühlerjalousie und reduzieren damit einen Lufteintritt bzw. eine Durchströmung des Fahrzeugs, genauer des Fahrzeug-Motorraums, in dem die Brennkraftstoffmaschine sowie ggf. ein Kühler für den Kühlflüssigkeitskreislauf angeordnet sind. Es wird dadurch eine Verblockung des Kühlers bzw. des Motorraums erreicht.Preferably, the fan, the especially for cooling an internal combustion engine is provided, occasionally even at high Vehicle speeds can be locked. When switching off the fan the radiator blades of the fan roughly similar like a radiator blind and thus reduce air entry or flow through the vehicle, more precisely the vehicle engine compartment in which the fuel engine and possibly a cooler for the Coolant circuit are arranged. This will block the cooler or the Engine compartment reached.
Ist also z. B. eine vorgegebene Fahrzeuggeschwindigkeit erreicht, bei der es für die Reduzierung des Luftwiderstands sinnvoll wäre, den Lüfter zu arretieren, wird erfindungsgemäß überprüft, ob beispielsweise die Kühlwassertemperatur unter einem vorgegeben Grenzwert liegt. Der Lastzustand der Brennkraftmaschine stellt eine weitere Randbedingung dar, die für das Arretieren des Lüfters von Bedeutung sein kann, wobei bei geringen Lasten und folglich geringem Kühlbedarf eine Verblockung in Frage kommt.So is z. B. a predetermined vehicle speed achieved at it for the reduction of the air resistance would make sense to lock the fan, is checked according to the invention whether, for example the cooling water temperature is below a predetermined limit. The load state of the internal combustion engine represents another constraint that is required for locking the fan of May be meaningful, with low loads and consequently low cooling requirements blocking is an option.
Vorzugsweise kann der Lüfter mit einem Elektromagneten arretiert werden. Dieser Elektromagnet soll nahe an der von den Lüfterflügeln aufgespannten Fläche an einem geeigneten feststehenden Bauelement befestigt sein. Dies kann beispielsweise eine Halterung an dem die Lüfterflügel in Rotation versetzenden Elektromotor oder die Brennkraftstoffmaschine oder der Kühler sein. Sind die oben genannten Bedingungen erfüllt, wird der Elektromagnet mithilfe eines geeigneten Steuergeräts erregt, und dadurch der Lüfter arretiert.The fan can preferably be used with be locked with an electromagnet. This electromagnet is said to close to that spanned by the fan blades area be attached to a suitable fixed component. This can for example, a bracket on which the fan blades set in rotation Electric motor or the fuel machine or the cooler. If the above conditions are met, the electromagnet will be used a suitable control unit excited, and thereby the fan locked.
Mit dem erfindungsgemäßen Verfahren, wird nicht nur der cw-Wert des Fahrzeugs deutlich verbessert, ebenso fallen keine wesentlichen Kosten für zusätzliche Bauteile an. Es kann mit dieser Vorrichtung bei hohen Fahrzeuggeschwindigkeiten der Kraftstoffverbrauch reduziert werden. Es können jedoch noch eine Vielzahl weiterer Details durchaus abweichend von obiger Beschreibung gestaltet sein, ohne den Inhalt der Patentansprüche zu verlassen.With the method according to the invention, not only is the c w value of the vehicle significantly improved, there are also no significant costs for additional components. With this device, fuel consumption can be reduced at high vehicle speeds. However, it can still a large number of further details may be designed to deviate from the above description without departing from the content of the claims.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002139879 DE10239879A1 (en) | 2002-08-29 | 2002-08-29 | Air resistance/drag reduction method for a motor vehicle uses a ventilator for cooling an internal combustion engine by feeding a stream of surrounding air into the vehicle engine area |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002139879 DE10239879A1 (en) | 2002-08-29 | 2002-08-29 | Air resistance/drag reduction method for a motor vehicle uses a ventilator for cooling an internal combustion engine by feeding a stream of surrounding air into the vehicle engine area |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10239879A1 true DE10239879A1 (en) | 2004-03-18 |
Family
ID=31724187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002139879 Withdrawn DE10239879A1 (en) | 2002-08-29 | 2002-08-29 | Air resistance/drag reduction method for a motor vehicle uses a ventilator for cooling an internal combustion engine by feeding a stream of surrounding air into the vehicle engine area |
Country Status (1)
Country | Link |
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DE (1) | DE10239879A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1486650A1 (en) | 2003-06-11 | 2004-12-15 | Bayerische Motoren Werke Aktiengesellschaft | Cooling device for a motor vehicle |
DE102005034775A1 (en) * | 2005-07-26 | 2006-11-09 | Daimlerchrysler Ag | Louver control for cooling system of internal combustion engine allows louver to open depending upon conditions relating to temperature of cooling fluid, engine temperature, fan status, suction air temperature, and vehicle speed |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3211793C2 (en) * | 1981-04-06 | 1985-11-07 | Alfa Romeo Auto S.p.A., Neapel/Napoli | Coolant temperature control system for a motor vehicle internal combustion engine |
DE4216135A1 (en) * | 1991-05-16 | 1992-11-19 | Mazda Motor | CONTROL DEVICE FOR A ROTATION BODY FOR COOLING A MOTOR |
DE4130066A1 (en) * | 1991-09-11 | 1993-03-18 | Licentia Gmbh | BLOWED, ESPECIALLY FOR MOTOR VEHICLES |
DE4431042A1 (en) * | 1994-09-01 | 1996-03-07 | Himmelsbach Johann | Cooling system for motor vehicle IC engine |
DE69801876T2 (en) * | 1997-08-01 | 2002-04-25 | C.R.F. S.C.P.A., Orbassano | Cooling system for a motor vehicle internal combustion engine |
-
2002
- 2002-08-29 DE DE2002139879 patent/DE10239879A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3211793C2 (en) * | 1981-04-06 | 1985-11-07 | Alfa Romeo Auto S.p.A., Neapel/Napoli | Coolant temperature control system for a motor vehicle internal combustion engine |
DE4216135A1 (en) * | 1991-05-16 | 1992-11-19 | Mazda Motor | CONTROL DEVICE FOR A ROTATION BODY FOR COOLING A MOTOR |
DE4130066A1 (en) * | 1991-09-11 | 1993-03-18 | Licentia Gmbh | BLOWED, ESPECIALLY FOR MOTOR VEHICLES |
DE4431042A1 (en) * | 1994-09-01 | 1996-03-07 | Himmelsbach Johann | Cooling system for motor vehicle IC engine |
DE69801876T2 (en) * | 1997-08-01 | 2002-04-25 | C.R.F. S.C.P.A., Orbassano | Cooling system for a motor vehicle internal combustion engine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1486650A1 (en) | 2003-06-11 | 2004-12-15 | Bayerische Motoren Werke Aktiengesellschaft | Cooling device for a motor vehicle |
DE10326637B3 (en) * | 2003-06-11 | 2005-01-13 | Bayerische Motoren Werke Ag | Cooling device for a motor vehicle |
DE102005034775A1 (en) * | 2005-07-26 | 2006-11-09 | Daimlerchrysler Ag | Louver control for cooling system of internal combustion engine allows louver to open depending upon conditions relating to temperature of cooling fluid, engine temperature, fan status, suction air temperature, and vehicle speed |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |