US2955869A - Aerodynamic motorcar - Google Patents

Aerodynamic motorcar Download PDF

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Publication number
US2955869A
US2955869A US624399A US62439956A US2955869A US 2955869 A US2955869 A US 2955869A US 624399 A US624399 A US 624399A US 62439956 A US62439956 A US 62439956A US 2955869 A US2955869 A US 2955869A
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United States
Prior art keywords
undersurface
car
motorcar
aerodynamic
cross
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Expired - Lifetime
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US624399A
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English (en)
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Blaser Hans
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining

Definitions

  • Modern automobile bodies mostly are of streamline shape in which in most cases the frontmost and the hindmost points of the cowling are positioned near the bumpers which are disposed at rather low levels.
  • the car bottom often is curved upwardly on both broadsides so that the air to be displaced by the car partly passes along the car head and partly is displaced to both sides of the car.
  • the technical literature also points in this direction, for example on page 177 of the book Aerodynamics of Motorcars by R. Koenig-Fachsenfeld, volume II, it is said:
  • the car bow has to be designed so that it raises most of the air above the car and does not depress same underneath the car.
  • the main object of my present invention is to eliminate these deficiencies by designing the car body or cowling differently, i.e. so that the lift is reduced to a minimum or eliminated altogether.
  • An even better result is obtained, of course, by virtue of a body shape of which the lift coefiicient is negative, that is a shape in the case of which the air currents passing under the car are narrowed, whereby, according to the aerodynamic principle, known as the Venturi effect, a downwardly directed suction is produced.
  • Such additional pressure obviously may increase the drag coefficient to some extent
  • the motorcar according to the present invention is characterized by the fact that it comprises a bottom with a smooth underside and without projecting portions, said underside being cambered upwardly in front and so designed that in each section which is perpendicular to the driving direction no point of the bottom underside is at a lower level than the two marginal points in order to pass as much as possible of the air to be displaced rearwardly below the car bottom and not above the car nor sidewards thereof.
  • an important object of the present invention is to provide a vehicle body having a smooth and uninterrupted undersurface with the undersurface being devoid of depending and projecting elements and being transversely concave along the vehicles longitudinal axis with the transverse concave cross-sections in the immediate regions of the front and rear axles being displaced from the ground surface at a height less than the height of the cross-sections in the regions of the rear, center and front portions of the'bodys undersurface.
  • Figure 1 is a schematic longitudinal elevational view of the vehicle body of the present invention.
  • Figure 2 is a schematic transverse view of the vehicle body.
  • the surface motor vehicle includes a body it that has a smooth and uninterrupted undersurface 12.
  • the undersurface 12 is devoid of dependent and projecting elements and is transversely concave along the vehicles longitudinal axis.
  • the undersurface is formed so that in any vertical cross-section of the body no portion of the undersurface is disposed at a lower level than the side marginal points 14 and 16, as shown in Figure 2.
  • transverse concave cross-sections uniformly vary in height relative to the ground surface along the vehicles longitudinal axis and, in this respect, the transverse concave cross-sections in the immediate regions of the front and rear axles 13 and 20, respectively, are displaced from the ground surface at a height less than the height of the cross sections in the regions of the rear portion 22, the center portion 24 and the front portion 26 of the bodys undersurface.
  • the undersurface uniformly diverges outwardly from the regions of the front and rear axles so that the cross-sectional area perpendicular to the vehicles longitudinal axis and formed between the bodys undersurface and the ground surface 28 at the region of the rear front axles 18 and 20 is less than at any other portion of the undersurface to provide points of low pressure relative to the rest of the undersurface during vehicle operation.
  • a vehicle body having a smooth and uninterrupted undersurface, said undersurface being devoid of dependent and projecting elements, and being transversely concave along the vehicles longitudinal axis, and being so formed that in any vertical cross-section of the body, no portion of the undersurface is disposed at a lower level than the side marginal points thereof, said transverse'concave cross-sections uniformly varying in height relative to the ground surface along the vehicles longitudinal axis, said transverse concave cross-sections in the immediate regions of the front and rear axles being displaced from the ground surface at a height less than the height of the cross-sections in the regions of the rear, center and front portions of the bodys undersurface, whereby the undersurface uniformly diverges outwardly from theregions of the front and rear axles so thatthe cross-sectional area perpendicular to-the vehicles longitudinal axis and formed between thebodys undersurface and the ground surface at the References Cited in the file of this patent UNITED STATES PATENTS Best Aug. 16,

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Toys (AREA)
  • Vehicle Body Suspensions (AREA)
US624399A 1955-11-30 1956-11-26 Aerodynamic motorcar Expired - Lifetime US2955869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH818936X 1955-11-30

Publications (1)

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US2955869A true US2955869A (en) 1960-10-11

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ID=4539215

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US624399A Expired - Lifetime US2955869A (en) 1955-11-30 1956-11-26 Aerodynamic motorcar

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US (1) US2955869A (de)
CH (1) CH339068A (de)
DE (1) DE1109046B (de)
FR (1) FR1160973A (de)
GB (1) GB818936A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425741A (en) * 1966-11-04 1969-02-04 Walter H Korff Land vehicle having minimum air drag
US3776587A (en) * 1972-02-14 1973-12-04 K Oxlade Surface vehicles with venturi attachment
US4049309A (en) * 1976-02-06 1977-09-20 Board Of Trustees Western Washington State College Automotive vehicle
US4386801A (en) * 1979-11-28 1983-06-07 Team Lotus International Limited Ground effect vehicle
FR2547262A1 (fr) * 1983-06-10 1984-12-14 Porsche Ag Element de carenage pour le bas d'un vehicule automobile, notamment d'une voiture particuliere
US6230836B1 (en) 1995-09-25 2001-05-15 Cke Technologies Inc. Aerodynamic automobile
CN102975778A (zh) * 2011-09-05 2013-03-20 董兰田 小弧顶、大弧底盘轿车
US20130291758A1 (en) * 2010-09-10 2013-11-07 Bombardier Transportation Gmbh Vehicle Head
US8731781B2 (en) 2012-03-06 2014-05-20 Michael Prentice Dynamically-supported movable downforce-generating underbody in a motor vehicle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1138285B (it) * 1981-04-30 1986-09-17 Renato Monzini Autoveicolo,per il trasporto di persone
DE3132341A1 (de) * 1981-08-17 1983-03-03 Ford-Werke AG, 5000 Köln Kraftfahrzeug-frontende mit einer verstellbaren luftleiteinrichtung
FR2517273B1 (fr) * 1981-11-27 1986-12-12 Bertin & Cie Carrosserie de vehicule automobile, notamment a derive arriere, et vehicule comprenant cette carrosserie
DE3150952A1 (de) * 1981-12-23 1983-06-30 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart "verkleidungsteil fuer die unterseite eines kraftfahrzeuges, insbesondere personenwagens"
GB2135941B (en) * 1983-03-01 1987-05-28 Stevens John Thomas Improving motor vehicle road holding
FR3107029B1 (fr) * 2020-02-10 2021-12-31 Psa Automobiles Sa Écran sous moteur pour véhicule automobile

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2126943A (en) * 1937-02-27 1938-08-16 Packard Motor Car Co Motor vehicle
US2719053A (en) * 1952-05-02 1955-09-27 James R Mcinnis Airfoils for motor vehicles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE927853C (de) * 1951-04-07 1955-05-20 Daimler Benz Ag Kraftfahrzeug mit windschnittiger Umrissform
DE1707591U (de) * 1952-09-25 1955-09-22 Wilhelm Dr Ing Ludowici Kraftfahrzeug.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2126943A (en) * 1937-02-27 1938-08-16 Packard Motor Car Co Motor vehicle
US2719053A (en) * 1952-05-02 1955-09-27 James R Mcinnis Airfoils for motor vehicles

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425741A (en) * 1966-11-04 1969-02-04 Walter H Korff Land vehicle having minimum air drag
US3776587A (en) * 1972-02-14 1973-12-04 K Oxlade Surface vehicles with venturi attachment
US4049309A (en) * 1976-02-06 1977-09-20 Board Of Trustees Western Washington State College Automotive vehicle
US4386801A (en) * 1979-11-28 1983-06-07 Team Lotus International Limited Ground effect vehicle
FR2547262A1 (fr) * 1983-06-10 1984-12-14 Porsche Ag Element de carenage pour le bas d'un vehicule automobile, notamment d'une voiture particuliere
US4569551A (en) * 1983-06-10 1986-02-11 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Panel member for an underside of an automotive vehicle, especially a passenger car
US6230836B1 (en) 1995-09-25 2001-05-15 Cke Technologies Inc. Aerodynamic automobile
US20130291758A1 (en) * 2010-09-10 2013-11-07 Bombardier Transportation Gmbh Vehicle Head
US9481377B2 (en) * 2010-09-10 2016-11-01 Bombardier Transportation Gmbh Vehicle head
CN102975778A (zh) * 2011-09-05 2013-03-20 董兰田 小弧顶、大弧底盘轿车
US8731781B2 (en) 2012-03-06 2014-05-20 Michael Prentice Dynamically-supported movable downforce-generating underbody in a motor vehicle

Also Published As

Publication number Publication date
DE1109046B (de) 1961-06-15
CH339068A (de) 1959-06-15
FR1160973A (fr) 1958-08-18
GB818936A (en) 1959-08-26

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