EP2598381A1 - Vehicle bonnet structure for pedestrian protection - Google Patents

Vehicle bonnet structure for pedestrian protection

Info

Publication number
EP2598381A1
EP2598381A1 EP11811947.8A EP11811947A EP2598381A1 EP 2598381 A1 EP2598381 A1 EP 2598381A1 EP 11811947 A EP11811947 A EP 11811947A EP 2598381 A1 EP2598381 A1 EP 2598381A1
Authority
EP
European Patent Office
Prior art keywords
bonnet
inner panel
semi
vehicle
spherical
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.)
Withdrawn
Application number
EP11811947.8A
Other languages
German (de)
French (fr)
Other versions
EP2598381A4 (en
Inventor
Sudesh Kumar Kaisare
Suresh Raghunath Kale
Ritesh Kumar Jain
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.)
Mahindra and Mahindra Ltd
Original Assignee
Mahindra and Mahindra Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahindra and Mahindra Ltd filed Critical Mahindra and Mahindra Ltd
Publication of EP2598381A1 publication Critical patent/EP2598381A1/en
Publication of EP2598381A4 publication Critical patent/EP2598381A4/en
Withdrawn legal-status Critical Current

Links

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)

Abstract

The invention relates to the vehicle bonnet structure for pedestrian protection. The vehicle bonnet 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 (1) having plurality of cuts (2) on the periphery are provided on the inner panel of the bonnet. A bead (3) is provided on the top of each of the said semispherical structure (1). The said semi-spherical structure (1) with bead (3) accommodated between said inner panel and outer panel.

Description

TITLE:-
VEHICLE BONNET STRUCTURE FOR PEDESTRIAN PROTECTION FIELD OF INVENTION:- 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:-
Most of 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. During vehicle and pedestrian collision, it is observed that the pedestrian is seriously injured due to the pedestrian's head striking the bonnet of the vehicle. To keep the risk of injury as low as possible, controlled resilience in the head impact region of the bonnet is required. The present invention addresses this problem and provides the novel bonnet structure that will protect the pedestrian in case of pedestrian impact by absorbing the impact energy.
OBJECTIVES OF THE PRESENT INVENTION:-
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.
Accordingly the invention provides 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..
BRIEF DESCRIPTION OF THE FIGURES:-
The invention will become more fully understood from the following detailed description, taken in conjunction with the accompanying drawings, wherein
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.
DETAILED DESCRIPTION OF THE PRESENT INVENTION:-
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. In case of pedestrian impact on the outer panel of the bonnet, the semi-spherical structure on the inner panel absorbs the impact energy and undergoes deformation as shown in Figure 2; thus protecting the pedestrian from serious injury. Head impact criteria (HIC), 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. Also 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. In case of modular inner panel the semi-spherical structures can be attached to the inner panel by clinching and/or riveting processes.

Claims

WE CLA1 :-
1. 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 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.
2. The vehicle bonnet structure as claimed in claim 1 wherein the said bonnet structure for automotive vehicle as disclosed herein made in plastic or metal sheets or combination of thereof.
3. The vehicle bonnet structure as claimed in claims 1 to2 wherein the inner panel of the bonnet made of metal sheet and the semi-spherical structure made of suitable grade of plastic fulfilling the requirement to absorb the head impact.
4. The vehicle bonnet structure as claimed in claims land 3 wherein the cutout size, thickness, sphere diameter and adding bead on the sphere of the said semi-spherical structures decided as per the stiffness as required for the head impact at particular location.
5. The vehicle bonnet structure as claimed in claims 1 to 4 wherein the said bonnet inner panel with semi-spherical structures made by forming process to get an integrated inner panel.
6. The vehicle bonnet structure as claimed in claims 1 to 5 wherein the modular inner panel the semi-spherical structures attached to the inner panel by clinching and/or riveting processes. The vehicle bonnet structure as claimed in claims 1 to 6 wherein the said semi- spherical structures are the add-on kind of fittings to the inner panel of the bonnet.
EP11811947.8A 2010-07-27 2011-07-28 Vehicle bonnet structure for pedestrian protection Withdrawn EP2598381A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2131MU2010 2010-07-27
PCT/IN2011/000499 WO2012014230A1 (en) 2010-07-27 2011-07-27 Vehicle bonnet structure for pedestrian protection

Publications (2)

Publication Number Publication Date
EP2598381A1 true EP2598381A1 (en) 2013-06-05
EP2598381A4 EP2598381A4 (en) 2014-01-08

Family

ID=45529499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11811947.8A Withdrawn EP2598381A4 (en) 2010-07-27 2011-07-28 Vehicle bonnet structure for pedestrian protection

Country Status (4)

Country Link
EP (1) EP2598381A4 (en)
JP (1) JP2013537862A (en)
KR (1) KR20130141450A (en)
WO (1) WO2012014230A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3017352B1 (en) * 2014-02-07 2017-07-21 Renault Sas AUTOMOTIVE BODY ELEMENT COMPRISING A TREILLIS LINING
CN112238835B (en) * 2019-07-19 2022-06-21 广州汽车集团股份有限公司 Engine cover assembly structure

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000168622A (en) * 1998-12-11 2000-06-20 Nissan Motor Co Ltd Planar member structure for automobile
JP2003054449A (en) * 2001-06-05 2003-02-26 Toyota Motor Corp Car body panel
DE102004061303A1 (en) * 2003-12-25 2005-08-04 Toyota Jidosha Kabushiki Kaisha, Toyota Hood for motor vehicle, has adjacent cone type projections mutually joined by beads provided at inner panel between projections provided at inner panel at equal intervals
JP2007137288A (en) * 2005-11-18 2007-06-07 Inoac Corp Impact absorbing member for vehicle
DE102006000502A1 (en) * 2006-04-30 2008-04-17 Jan Jansen Deformation structure for motor vehicles for protection of passengers or pedestrians in case of accident, has connecting element connects outer and inner parts and predetermined breaking point is provided within complete interconnection
KR20080059786A (en) * 2006-12-26 2008-07-01 현대자동차주식회사 Method for manufacturing the bonnet for cars
JP2009280008A (en) * 2008-05-20 2009-12-03 Toyota Central R&D Labs Inc Expansion structure body, and shock absorbing device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621677B1 (en) * 1987-10-13 1990-06-22 Heuliez Henri France Design RIGID STRUCTURE FOR REALIZING THREE-DIMENSIONAL PANELS OR ELEMENTS
DE10063586A1 (en) * 2000-05-08 2002-08-29 Volkswagen Ag Energy-absorbent body part for motor vehicles has internal chambers formed by honeycomb profiles, containing airbags and connected to gas generator
JP4282377B2 (en) * 2003-06-04 2009-06-17 株式会社神戸製鋼所 Body panel structure
DE102005015057A1 (en) * 2005-03-31 2006-10-19 Benteler Automobiltechnik Gmbh Front hood for a motor vehicle
JP4801524B2 (en) * 2006-07-21 2011-10-26 株式会社神戸製鋼所 Automotive hood

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000168622A (en) * 1998-12-11 2000-06-20 Nissan Motor Co Ltd Planar member structure for automobile
JP2003054449A (en) * 2001-06-05 2003-02-26 Toyota Motor Corp Car body panel
DE102004061303A1 (en) * 2003-12-25 2005-08-04 Toyota Jidosha Kabushiki Kaisha, Toyota Hood for motor vehicle, has adjacent cone type projections mutually joined by beads provided at inner panel between projections provided at inner panel at equal intervals
JP2007137288A (en) * 2005-11-18 2007-06-07 Inoac Corp Impact absorbing member for vehicle
DE102006000502A1 (en) * 2006-04-30 2008-04-17 Jan Jansen Deformation structure for motor vehicles for protection of passengers or pedestrians in case of accident, has connecting element connects outer and inner parts and predetermined breaking point is provided within complete interconnection
KR20080059786A (en) * 2006-12-26 2008-07-01 현대자동차주식회사 Method for manufacturing the bonnet for cars
JP2009280008A (en) * 2008-05-20 2009-12-03 Toyota Central R&D Labs Inc Expansion structure body, and shock absorbing device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012014230A1 *

Also Published As

Publication number Publication date
WO2012014230A8 (en) 2013-11-07
EP2598381A4 (en) 2014-01-08
JP2013537862A (en) 2013-10-07
KR20130141450A (en) 2013-12-26
WO2012014230A1 (en) 2012-02-02

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