Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
  • B62D25/08—Front or rear portions
  • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
  • B62D25/105—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles for motor cars
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
  • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
  • B60R2021/343—Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components

Definitions

• the present invention is related to vehicle bonnet structure. More particularly the present invention is related to bonnet structure having deformable head impact zone and used in automobile vehicle and like other vehicles that protects the pedestrian at the time of impact. BACKGROUND OF THE PRESENT INVENTION:-
• the vehicle bonnets include a generally planar or curvilinear outer skin which is joined to a series of reinforcing ribs provided by a stamped metallic sheet of material.
• a stamped metallic sheet of material a stamped metallic sheet of material.
• the main objective of the present invention is to provide vehicle bonnet structure for pedestrian protection.
• Another objective of the present invention is to provide vehicle bonnet structure with semi-spherical bulbs having a definite cut outs for pedestrian protection.
• Another objective of the present invention is to provide vehicle bonnet structure for pedestrian protection wherein head impact energy is absorbed by the semi-spherical structures by undergoing deformation.
• the vehicle bonnet structure for pedestrian protection comprises outer panel between front end and wind shield of vehicle; an inner panel disposed and secured along the entire region of a reverse surface of the said outer panel; the plurality of Semi-spherical configurations; each semi-spherical configuration having the plurality of cuts on the periphery are provided on the inner panel of the bonnet; a bead is provided on the top of each of the said semispherical structure ; the said semi-spherical structure with bead accommodated between said inner panel and outer panel .
• Figure 1 shows isometric view of panel of a bonnet structure in accordance with the present invention.
• Figure 2 shows bonnet structure wherein semi-spherical projections on the panel are deformed due to the head impact.
• Figure 3 shows acceleration versus time plot and HIC criteria of a location hood.
• the vehicle bonnet structure is located between the front end and a windshield of a vehicle.
• the vehicle bonnet structure comprises of an outer panel structuring a vehicle body outer side surface, an inner panel disposed along the entire region of a reverse surface of the bonnet outer panel and secured to the outer panel.
• Semi- spherical configurations (1 ) with specially made cuts (2) are provided on the inner panel of the bonnet as disclosed in Figure 1.
• Each semi-spherical structure is provided with the bead (3) on the top of the semi-spherical structure (1).
• the semi- spherical structures (1) with cut outs (2) provides the flexibility of changing the stiffness as required for the head impact at particular location by changing the cutout size, thickness, sphere diameter and by adding bead on the sphere.
• the semi- spherical structures with cut outs are accommodated in between the space between inner panel and outer panel of the bonnet and outer panel of the bonnet rests on the beads of the semi-spherical structure.
• the semi-spherical structure is provided with plurality of cuts along its periphery.
• Head impact criteria sometimes called as head performance criteria, is measured by a spherical like object simulating the pedestrian head is impacted with the bonnet.
• the spherical object has an aceelerometer mounted therein and HIC is calculated from the resultant of aceelerometer time histories. Because of this semi- spherical structure on the inner panel of the bonnet HIC value is reduced too much below the permissible limit as shown in Figure 3.
• This design can be adopted for different vehicle engine layout by altering the stiffness. This design gives the flexibility of changing the stiffness as required for the head impact at particular location by changing the cutout size, thickness, sphere diameter and by adding bead on the sphere.
• the bonnet structure for automotive vehicle as disclosed herein can be made in plastic or metal sheets or combination of thereof.
• the inner panel of the bonnet can be made of metal sheet and the semi-spherical, structure can be made of suitable grade of plastic.
• the impact absorbing semi-spherical structures can be the add-on kind of fittings to the inner panel of the bonnet.
• the bonnet inner panel with semi-spherical structures can be made by forming to get an integrated inner panel.
• the semi-spherical structures can be attached to the inner panel by clinching and/or riveting processes.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Superstructure Of Vehicle (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=45529499

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Citations (7)

Family Cites Families (5)

• 2011
  • 2011-07-27 WO PCT/IN2011/000499 patent/WO2012014230A1/en active Application Filing
  • 2011-07-28 KR KR1020137004949A patent/KR20130141450A/ko not_active Application Discontinuation
  • 2011-07-28 EP EP11811947.8A patent/EP2598381A4/de not_active Withdrawn
  • 2011-07-28 JP JP2013521288A patent/JP2013537862A/ja active Pending

Patent Citations (7)

Non-Patent Citations (1)

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