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CN-116096606-B - Bumper system for motor vehicle

CN116096606BCN 116096606 BCN116096606 BCN 116096606BCN-116096606-B

Abstract

The present invention relates to a motor vehicle comprising a distal end, at least one crash bar and a bumper system provided at the distal end, wherein the bumper system is configured to limit damage to the motor vehicle by absorbing crash energy in a low speed collision with an object at the distal end, wherein the bumper system comprises a bumper beam and at least one crash box, wherein the bumper beam is configured to absorb at least 35%, preferably at least 40%, more preferably at least 45% of the crash energy in a RCAR low speed structural crash test, and wherein the at least one crash box is configured to absorb at least 35%, preferably at least 40%, more preferably at least 45% of the crash energy in the RCAR low speed structural crash test to limit a maximum intrusion distance of the object.

Inventors

  • STORM POTKAMP

Assignees

  • 阿特拉斯科技控股有限公司

Dates

Publication Date
20260505
Application Date
20210914
Priority Date
20200915

Claims (10)

  1. 1. A motor vehicle (1), comprising: chassis, wherein an outer body (18) is provided on the chassis, the outer body comprising an upper surface (19), the upper surface (19) comprising at least one solar panel (20), A distal end (2), At least one crash bar (3) extending in a longitudinal direction (4) of the vehicle towards the distal end, the crash bar comprising a free end (5), A bumper system (6) provided at the distal end, wherein the bumper system is configured to limit damage to the motor vehicle by absorbing collision energy in a low speed collision (7), wherein the bumper system comprises: a bumper beam (10) extending substantially perpendicular to a longitudinal axis (11) of the motor vehicle, At least one crash box (12) extending substantially parallel to the longitudinal axis of the motor vehicle, the at least one crash box comprising a first end (13) and an opposite second end (14), wherein the first end is connected to the bumper beam, and wherein the second end is connected to the free end of the at least one crash bar of the motor vehicle, Wherein the bumper beam is configured to absorb at least 35% of the impact energy in a RCAR low speed structural impact test (15), and wherein the at least one crash box is configured to absorb at least 35% of the impact energy in the RCAR low speed structural impact test to limit a maximum intrusion distance (16) of an object, Wherein in the low-speed collision, the maximum intrusion distance along the distal end defines a maximum intrusion line (21) extending substantially parallel to the distal end at a distance (22) thereof, wherein in a top view the at least one solar panel extends away from the distal end from the maximum intrusion line, And/or wherein the at least one crash bar is connected at its free end to the second end of the at least one crash box and at its opposite end (23) to the chassis, wherein in a top view the at least one solar panel extends from the free end of the at least one crash bar away from the distal end.
  2. 2. A motor vehicle according to claim 1, wherein the bumper system comprises two crash boxes positioned at a distance (24) from each other in a direction substantially perpendicular to the longitudinal axis of the motor vehicle.
  3. 3. Motor vehicle according to claim 1, wherein the at least one crash box comprises a hollow beam (26), wherein the interior volume (27) of the hollow beam comprises an aluminum foam filler (28).
  4. 4. A motor vehicle according to claim 3, wherein the hollow beam has a wall thickness of between 1-3 mm.
  5. 5. A motor vehicle in accordance with claim 1, wherein the bumper beam and/or the at least one crash box are made of a material comprising aluminum.
  6. 6. Motor vehicle according to claim 1, wherein the bumper beam has a filling rate (30) of at least 25% in a cross-sectional view.
  7. 7. A motor vehicle according to claim 1, wherein the bumper beam has a wall thickness (31) of between 3-5 mm.
  8. 8. The motor vehicle of claim 1, wherein the bumper beam is curved in plan view.
  9. 9. The motor vehicle according to claim 2, wherein the bumper beam has a length (32), wherein the length is equal to or greater than a distance (24) between two crash boxes and at least less than or equal to a distal width (34) of the distal end of the motor vehicle.
  10. 10. The motor vehicle according to claim 1, wherein the bumper beam and the at least one crash box are configured to absorb the crash energy by plastic deformation (35) thereof.

Description

Bumper system for motor vehicle Technical Field The present invention relates to a bumper system for a motor vehicle and a motor vehicle comprising said bumper system. The project on which the application is based has been sponsored by the European Union horizon 2020 research and innovation program, and the money dialing protocol number is 848620. Background When the motor vehicle comes into contact with an external object, for example another motor vehicle, the external object and/or the motor vehicle will be damaged. Typically the motor vehicle is damaged. To limit damage, motor vehicles typically include a bumper system at their distal ends (i.e., front and/or rear ends). For an automobile crash, a distinction is made between a low-speed crash and a high-speed crash. In this case, a collision of 15km/h is considered a low-speed collision, and a collision of a speed higher than 15km/h is considered a high-speed collision. During low speed collisions, there is a major concern for reducing damage to the vehicle, while for high speed collisions there is a major concern for occupant safety. The object of the invention is to reduce damage to a motor vehicle in a low-speed collision. This object is particularly relevant for expensive motor vehicles, since the maintenance costs are often also expensive. Expensive motor vehicles are for example motor vehicles comprising solar panels. A vehicle that is at least partially charged by solar energy includes a solar panel provided on an upper surface of the motor vehicle and used to charge one or more battery packs of the motor vehicle. The battery pack provides at least part of the required energy for driving the motor vehicle. In order to maximize solar charge capacity, it is desirable to maximize the solar panel area on the upper surface of the motor vehicle. Solar panel area is related to kilometers that are driven by the sun alone each year, with larger solar panel area implying more annual solar mileage. Because the solar panel is an expensive component, damage to the solar panel during a low-speed collision should be prevented. Disclosure of Invention Object of the Invention It is an object of the present invention to provide a motor vehicle that suffers less damage in low speed collisions. Another object of the invention is to provide a motor vehicle that is capable of traveling for more years with solar power mileage. Summary of The Invention To achieve at least one object, there is provided a motor vehicle comprising: At the distal end of the tube, At least one crash bar extending in a longitudinal direction of the vehicle towards the distal end, the crash bar comprising a free end, A bumper system provided at the distal end, wherein the bumper system is configured to limit damage to the motor vehicle by absorbing collision energy in a low-speed collision with an object at the distal end, wherein the bumper system comprises A bumper beam extending substantially perpendicular to a longitudinal axis of the motor vehicle, At least one crash box extending generally parallel to the longitudinal axis of the motor vehicle, the at least one crash box comprising a first end and an opposing second end, wherein the first end is connected to the bumper beam, and wherein the second end is connected to the free end of the at least one impact beam of the motor vehicle, Wherein the bumper beam is configured to absorb at least 35%, preferably at least 40%, more preferably at least 45% of the impact energy in a RCAR low speed structural impact test, and wherein the at least one crash box is configured to absorb at least 35%, preferably at least 40%, more preferably at least 45% of the impact energy in the RCAR low speed structural impact test to limit the maximum intrusion distance of the object. RCAR stands for the research committee for car repair, hereinafter abbreviated as RCAR. The RCAR low speed structural crash test is a widely used test for determining the extent of damage to a motor vehicle. A bumper system for a motor vehicle is configured to limit a maximum intrusion distance of an object. By limiting the maximum intrusion distance, a greater portion of the motor vehicle remains undamaged during low speed collisions. This reduces the damage costs and increases the available space, e.g. of the trunk, and in case the vehicle comprises solar panels, increases the available area of these solar panels. This is advantageous for expensive motor vehicles, since a limited intrusion distance will result in less damage than a larger intrusion distance. This is particularly advantageous for motor vehicles having solar panels on their upper surface. By limiting the maximum intrusion distance, a greater upper surface area of the motor vehicle can be used to provide solar panels without damaging them in low speed collisions. Further, providing more solar panels will increase the solar mileage. The maximum intrusion distance is reduced by having the bumper beam absorb at least 35%,