DE587555C - Cooling device for vehicles in streamlined form with engine installed in the rear - Google Patents

Cooling device for vehicles in streamlined form with engine installed in the rear

Info

Publication number
DE587555C
DE587555C DEO20283D DEO0020283D DE587555C DE 587555 C DE587555 C DE 587555C DE O20283 D DEO20283 D DE O20283D DE O0020283 D DEO0020283 D DE O0020283D DE 587555 C DE587555 C DE 587555C
Authority
DE
Germany
Prior art keywords
vehicles
cooling device
vehicle
engine installed
streamlined form
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.)
Expired
Application number
DEO20283D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WINFRIED OPPELT
Original Assignee
WINFRIED OPPELT
Publication date
Priority to DEO20283D priority Critical patent/DE587555C/en
Application granted granted Critical
Publication of DE587555C publication Critical patent/DE587555C/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Description

Es ist bekannt, Fahrzeuge stromlinienförmig auszubilden, um Wirbelbildung" und damit den Luftwiderstand zu verringern. Solche Wagen werden zweckmäßig mit Heck-,5 motor ausgerüstet. Die Kühlung des hintenliegenden Motors bereitet hierbei Schwierigkeiten, welchen durch nachfolgend beschriebene Anordnung begegnet wird.It is known to streamline vehicles to avoid vortex formation "and thus reducing air resistance. Such wagons are expediently equipped with a rear, 5 motor equipped. The cooling of the rear engine causes difficulties here, which is countered by the arrangement described below.

Bei stromlinienförmigen Fahrzeugen tritt eine nur geringe Wirbelbildung auf. Das Strömungsbild entspricht daher ungefähr den in Fig. ι dargestellten Verhältnissen und stellt eine Annäherung an die Potentialströmung dar. Hierbei erweitern sich die Stromlinien ./4 gegen Ende des Fahrzeuges zu vA. Da nun das zwischen zwei Stromlinien eingeschlossene Luftvolumen konstant ist (Kontinuitätsbedingung), muß sich die Relativgeschwindigkeit der Luftteilchen gegen das Fahrzeugende zu verringern. Nach der Bernoullischen Gleichung ist die Summe aus kinetischer und Druckenergie für dasselbe Luftvolumen stets gleich. Mit fallender Geschwindigkeit steigt also der Druck an; zwisehen zwei Stellen verschiedener Luftgeschwindigkeit befindet sich daher eine Druckdifferenz. Die Druckverteilung in der Längsebene des Fahrzeuges, wie sie der Versuch ergibt, ist in Fig. 1 ebenfalls eingezeichnet. In the case of streamlined vehicles, there is only a small amount of vortex formation. The flow pattern therefore corresponds approximately to the relationships shown in FIG. 1 and represents an approximation of the potential flow. Here, the streamlines ./4 widen to v A towards the end of the vehicle. Since the volume of air enclosed between two streamlines is constant (continuity condition), the relative speed of the air particles must decrease towards the end of the vehicle. According to Bernoulli's equation, the sum of kinetic and pressure energy is always the same for the same volume of air. As the speed decreases, the pressure increases; There is therefore a pressure difference between two points with different air velocities. The pressure distribution in the longitudinal plane of the vehicle, as shown by the experiment, is also shown in FIG. 1.

.Zwischen Heck und Mittelstück des Fahrzeuges entsteht also eine Druckdifferenz Ap, die hier dazu benutzt wird, um die Kühlluft durch das Fahrzeug zu treiben. Diese Kühlluft strömt vom Fahrzeugende entgegen der äußeren Strömungsrichtung Va nach vorn zu der nahe dem größten Querschnitt des Wagenstromlinienkörpers gelegenen Austrittsöffnung. Die Auslaßöffnungen befinden sich also ati Stellen hoher Luftgeschwindigkeit und demgemäß niederen Druckes, wohingegen die Einströmöffhungen an Stellen geringer Luftgeschwindigikeit und daher höherenJDrukkes verlegt sind, also zweckmäßig gegen das Profilende des Stromlinienkörpers zu. Verschiedene Möglichkeiten sind in Fig. 2 dargestellt. So können sich beispielsweise Einlaßöffnungen α und Auslaßöffnungen c beide an der Fahrzeugoberseite befinden. Öffnungen b, d können aber auch an den Seitenwänden^ angebracht werden. Eine Strömung ist jetzt möglich von α nach c, von α nach d, von b nach d, von b nach c und von α und b nach c und d. Da Em- und Ausströmöffnungen durch das Fahrzeuginnere miteinander verbunden sind, suchen sich hierüber die Druckdifferenzen auszugleichen und rufen dabei die Kühlluftströmung hervor. So there is a pressure difference Ap between the rear and the middle section of the vehicle, which is used here to drive the cooling air through the vehicle. This cooling air flows from the end of the vehicle against the outer flow direction Va forwards to the outlet opening located near the largest cross section of the vehicle streamlined body. The outlet openings are therefore at points of high air speed and, accordingly, low pressure, whereas the inflow openings are relocated at points of low air speed and therefore higher pressures, i.e. appropriately towards the end of the profile of the streamlined body. Different possibilities are shown in FIG. For example, inlet openings α and outlet openings c can both be located on the top of the vehicle. Openings b, d can also be attached to the side walls ^. A flow is now possible from α to c, from α to d, from b to d, from b to c and from α and b to c and d. Since the inflow and outflow openings are connected to one another through the vehicle interior, the pressure differences try to equalize each other and thereby induce the flow of cooling air.

Ein- und Ausströmöffnungen werden zweckmäßig durch einen Kanal verbunden, in dem 6p sich bei Wasserkühlung (vgl. Fig. 4) der Kühler K., bei Luftkühlung (vgl. Fig. 3) die Zylinder Z des Motors befinden. Besonders um für genügende Strömung bei Stillstand des Wagens zu sorgen, wird zweckmäßig ein vom Motor angetriebener Windflügel eingebaut. Die Richtung dieser Ventilatorströmung vv muß dann übereinstimmen mit der durch das aerodynamische DruckgefälleJ^ hervorgerufenen Kühlluftströmung Vj1. Inlet and outflow openings are expediently connected by a channel in which 6p the radiator K is located for water cooling (cf. FIG. 4) and the cylinder Z of the engine for air cooling (cf. FIG. 3). In order to ensure a sufficient flow when the car is at a standstill, a wind vane driven by the motor is expediently installed. The direction of this fan flow v v must then coincide with the cooling air flow Vj 1 caused by the aerodynamic pressure gradient J ^.

Claims (1)

Patentanspruch:Claim: Kühleinrichtung für Fahrzeuge in Stromlinienform mit hinten eingebautem Motor, dadurch gekennzeichnet, daß sich nahe dem größten Profilquerschnitt an einem Ort niederen statischen Druckes die Ausströmöffnung [c, d) für die an einer am Heck befindlichen Einströmstelle (a, b) ins Wageninnere einströmende Kühlluft befindet, die bei ihrem gegebenenfalls mit Gebläseunterstützung in Fahrtrichtung erfolgenden Durchströmen durch das Wageninnere die Teile (Z, K) der Maschinenanlage kühlt.Cooling device for vehicles in streamlined form with engine installed at the rear, characterized in that the outflow opening [c, d) for the cooling air flowing into the interior of the vehicle at an inflow point (a, b) at the rear is located near the largest profile cross-section at a location of low static pressure which cools the parts (Z, K) of the machine system when it flows through the interior of the car, possibly with the assistance of a fan, in the direction of travel. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DEO20283D Cooling device for vehicles in streamlined form with engine installed in the rear Expired DE587555C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO20283D DE587555C (en) Cooling device for vehicles in streamlined form with engine installed in the rear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO20283D DE587555C (en) Cooling device for vehicles in streamlined form with engine installed in the rear

Publications (1)

Publication Number Publication Date
DE587555C true DE587555C (en) 1933-11-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEO20283D Expired DE587555C (en) Cooling device for vehicles in streamlined form with engine installed in the rear

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DE (1) DE587555C (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE866150C (en) * 1940-04-26 1953-02-09 Auto Union A G Motor vehicle with slippery fairing
DE753332C (en) * 1938-10-23 1953-02-23 Bayerische Motoren Werke Ag Cooling air supply for vehicles with a streamlined structure
DE762590C (en) * 1940-07-31 1954-12-20 Ringhoffer Tatra Werke Ag Cooling air duct for streamlined rear-engined vehicles
DE943746C (en) * 1951-11-09 1956-06-01 Erik Olof Emanuel Af Geijersta Arrangement for reducing the air resistance in automobiles and similar vehicles
DE1032117B (en) * 1955-02-22 1958-06-12 Halleiner Motorenwerke Hinterb Cooling device for scooters or the like.
US2958385A (en) * 1954-07-09 1960-11-01 Volkswagenwerk Ag Motor compartment ventilator especially for motor vehicles having rear mounted motors
DE1107539B (en) * 1955-12-01 1961-05-25 Fichtel & Sachs Ag Cooling air duct for blown-cooled vehicle engines, especially for scooters
US6179077B1 (en) * 1997-12-19 2001-01-30 Georgia Tech Research Corporation Vehicle heat exchanger system and method for a vehicle that augments and modifies aerodynamic forces
DE10233041A1 (en) * 2002-07-20 2004-02-12 Daimlerchrysler Ag Rear body section for motor vehicles esp. cars has air outlet in upper contour section for ejection of air to act like rear spoiler
ITBI20110005A1 (en) * 2011-05-19 2012-11-20 Leonardo Rossi HEAT EXCHANGER SYSTEM FOR HOT LIQUIDS OUTDOOR, FOR VEHICLES AND MOTORCYCLES, IMPLEMENTABLE ON COMPETITION AND STANDARD VEHICLES

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753332C (en) * 1938-10-23 1953-02-23 Bayerische Motoren Werke Ag Cooling air supply for vehicles with a streamlined structure
DE866150C (en) * 1940-04-26 1953-02-09 Auto Union A G Motor vehicle with slippery fairing
DE762590C (en) * 1940-07-31 1954-12-20 Ringhoffer Tatra Werke Ag Cooling air duct for streamlined rear-engined vehicles
DE943746C (en) * 1951-11-09 1956-06-01 Erik Olof Emanuel Af Geijersta Arrangement for reducing the air resistance in automobiles and similar vehicles
US2958385A (en) * 1954-07-09 1960-11-01 Volkswagenwerk Ag Motor compartment ventilator especially for motor vehicles having rear mounted motors
DE1032117B (en) * 1955-02-22 1958-06-12 Halleiner Motorenwerke Hinterb Cooling device for scooters or the like.
DE1107539B (en) * 1955-12-01 1961-05-25 Fichtel & Sachs Ag Cooling air duct for blown-cooled vehicle engines, especially for scooters
US6179077B1 (en) * 1997-12-19 2001-01-30 Georgia Tech Research Corporation Vehicle heat exchanger system and method for a vehicle that augments and modifies aerodynamic forces
DE10233041A1 (en) * 2002-07-20 2004-02-12 Daimlerchrysler Ag Rear body section for motor vehicles esp. cars has air outlet in upper contour section for ejection of air to act like rear spoiler
DE10233041B4 (en) * 2002-07-20 2006-04-20 Daimlerchrysler Ag Rear end of a motor vehicle
ITBI20110005A1 (en) * 2011-05-19 2012-11-20 Leonardo Rossi HEAT EXCHANGER SYSTEM FOR HOT LIQUIDS OUTDOOR, FOR VEHICLES AND MOTORCYCLES, IMPLEMENTABLE ON COMPETITION AND STANDARD VEHICLES

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