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DE-102024133051-A1 - motor vehicle

DE102024133051A1DE 102024133051 A1DE102024133051 A1DE 102024133051A1DE-102024133051-A1

Abstract

The invention relates to a motor vehicle (1), in particular a passenger car, preferably a sports car, with a chassis (2) having four wheels (3) with which the motor vehicle (1) stands or drives on a roadway (4), and with a body (5) supported by the chassis (2), which has a rear section (6) at the rear and a front section (7) at the front, wherein the front section (7) has two wheel housings (8) in which one of the wheels (3) is arranged in each, and two fenders (9) for covering each of the two wheel housings (8). The two fenders (9) each have a wheel arch vent (10) for discharging cooling air (12) for cooling a brake system (13) of the respective wheel (3) into an environment (11) of the motor vehicle (1), wherein the respective wheel arch vent (10) has an air inlet opening (15) open towards the respective wheel (3) on the respective wheel arch (8) and an air outlet opening (16) open towards the environment (11) on the respective fender (9). To improve pedestrian protection, the air inlet opening (15) and the air outlet opening (16) in the respective wheel arch ventilation (10) are connected by a cooling air duct (17) running in the fender (9), the respective air outlet opening (16) being located on the respective fender (9) at a rear end section (35) of a head impact area (18) in which, in a crash event in which the motor vehicle (1) collides head-on with a pedestrian, the pedestrian's head can strike.

Inventors

  • Benjamin Müller
  • Jost Boettcher
  • Thorsten Kernchen
  • Oliver Kube

Assignees

  • DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT

Dates

Publication Date
20260513
Application Date
20241112

Claims (10)

  1. Motor vehicle (1), in particular passenger car, preferably sports car, - with a chassis (2) having four wheels (3) with which the motor vehicle (1) is stationary or moving on a roadway (4), - with a body (5) supported by the chassis (2), which has a rear section (6) at the rear and a front section (7) at the front, - wherein the front section (7) has two wheel housings (8), in each of which one of the wheels (3) is arranged, and two fenders (9) for covering each of the two wheel housings (8), - wherein each of the two fenders (9) has a wheel housing vent (10) for discharging cooling air (12) for cooling a brake system (13) of the respective wheel (3) into an environment (11) of the motor vehicle (1), - wherein the respective wheel housing vent (10) has an air inlet opening (15) on the respective wheel housing (8) open towards the respective wheel (3) and on the respective fender (9) an opening towards the environment (11). has open air outlet openings (16) which are connected to each other by a cooling air duct (17) running in the fender (9), - wherein the respective air outlet opening (16) on the respective fender (9) is located at a rear end section (35) of a head impact area (18) in which, in a crash event in which the motor vehicle (1) collides head-on with a pedestrian, the head of the pedestrian may strike.
  2. motor vehicle (1) according to Claim 1 , characterized in that the respective air outlet opening (16) is arranged behind a pivot axis (19) of the wheel (3) arranged in the respective wheel housing (8).
  3. motor vehicle (1) according to Claim 1 or 2 , characterized in that the respective air outlet opening (16) is arranged at a rear end (20) of the respective fender (9).
  4. Motor vehicle (1) according to one of the preceding claims, characterized in that a front end (22) of the respective air outlet opening (16) is spaced rearward from a rear end (23) of the respective air inlet opening (15).
  5. Motor vehicle (1) according to one of the preceding claims, characterized in that the respective cooling air duct (17) extends further in a longitudinal direction (X) of the vehicle than transversely to the longitudinal direction (X) of the vehicle.
  6. Motor vehicle (1) according to one of the preceding claims, characterized in that the cooling air duct (17) has a crash structure (24) for energy absorption in the event of a crash.
  7. Motor vehicle (1) according to one of the preceding claims, characterized in that the respective wheel arch ventilation (10) has air guide vanes (26) in the respective air outlet opening (16) which are flexibly designed.
  8. motor vehicle (1) according to Claim 7 , characterized in that the air guide vanes (26) are held by a supporting structure (27) on the respective fender (9) which has a crash structure (28) for energy absorption in the event of a crash.
  9. motor vehicle (1) according to Claim 6 or 8 , characterized in that , - the crash structure (24, 28) has at least one predetermined breaking point (29).
  10. motor vehicle (1) according to Claim 9 , characterized in that the respective predetermined breaking point (29) has at least one of a slot (30) and a material weakening (32) and a fracture-promoting geometry (33) or is formed by at least one of them.

Description

The present invention relates to a motor vehicle, in particular a passenger car, preferably a sports car. A motor vehicle typically has a chassis with four wheels, which allow the vehicle to stand or move on a roadway, and a body supported by the chassis, comprising a rear section and a front section. The rear and front sections may each have two wheel arches, each housing one wheel, and two fenders to cover each wheel arch. For increased pedestrian protection, motor vehicles must meet requirements for a so-called HIC value, where HIC stands for Head Injury Criterion. The HIC value defines a criterion for assessing acceleration-related head injuries in a crash. From the US 6 547 316 B2 A known impact-absorbing fender structure for a motor vehicle with a pedestrian protection function. EP 1 403 175 B1 A fender with deformation elements is known. In the EP 1 484 235 B1 A fender bracket is described that has ribs configured to buckle in the event of a downward impact. EP 1 608 536 B1 Disclosing a device for supporting a body part of a motor vehicle. From the EP 2 004 475 B1 A front section of a motor vehicle is known in which a component is provided to support a front fender. For effective pedestrian protection, it is therefore desirable to configure an energy-absorbing head impact zone in the front area, including the fenders. This zone is defined as a space where, in a head-on collision, the pedestrian's head can impact the vehicle head-on. High energy absorption is essential for effective pedestrian protection, and this is facilitated by soft and flexible structures in the front area, including the fenders. In sporty vehicles, particularly sports cars, there is a need to integrate wheel arch vents into the front fenders. These vents allow cooling air, used to cool the brakes of the respective wheels, to be discharged into the surrounding area. Such vents stiffen the fender, resulting in conflicting requirements regarding pedestrian protection. In the present context, a “configuration” corresponds to a “design” and/or a “setup”, so that the phrase “configured so that” is synonymous with the phrase “designed so that” and/or “set up so that”. The present invention addresses the problem of providing an improved or at least a different embodiment for a motor vehicle of the type described above, which is characterized by increased pedestrian protection and is particularly suitable for sports cars or sports vehicles. This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims. The invention is based on the general concept of repositioning an air outlet opening located on the outside of a motor vehicle, where the front fenders are equipped with wheel arch ventilation, by means of a cooling air duct, so far rearward that the air outlet opening is ultimately located at a rear end section of the head impact area. This measure largely avoids a collision with a structure of the respective fender stiffened by the air outlet opening, thus increasing pedestrian protection. The air outlet opening can still be located entirely within the head impact area. Preferably, however, the air outlet opening is located at least partially outside and thus behind the head impact area. Particularly preferably, the air outlet opening is located entirely outside or behind the head impact area. In this context, the relative terms "front" and "rear" refer to the motor vehicle, with "front" being the front area and "rear" the rear area. The vehicle's longitudinal direction extends from front to rear or vice versa. The extent of the head impact area on the respective fender is determined in particular by regulations and standardized tests. Specifically, a motor vehicle, in particular a passenger car, preferably a sports car, is proposed, which has a chassis with four wheels with which the motor vehicle stands or drives on a roadway, as well as a body supported by the chassis, which has a rear The vehicle has a rear section and a front section. The front section has two wheel housings, each containing one of the wheels, and two fenders, each enclosing one of the wheel housings. In the vehicle according to the invention, each fender has a wheel housing vent for discharging cooling air for cooling the brake system of the respective wheel into the surrounding area of the vehicle. Each wheel housing vent has an air inlet opening open towards the respective wheel and an air outlet opening open towards the surrounding area on the respective fender, which are fluidically connected to each other by a cooling air duct running within the fender. According to the invention, the respective air outlet opening on each fender is located at a rear end section of a head impact area. In this head impact area, the pedestrian's head can strike the surface in a crash where the vehicle collides head-on with a pedestrian. In addition to or as an alternative t