CN1636817A - Vehicle engine hood - Google Patents
Vehicle engine hood Download PDFInfo
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- CN1636817A CN1636817A CNA2004101036581A CN200410103658A CN1636817A CN 1636817 A CN1636817 A CN 1636817A CN A2004101036581 A CNA2004101036581 A CN A2004101036581A CN 200410103658 A CN200410103658 A CN 200410103658A CN 1636817 A CN1636817 A CN 1636817A
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- wainscot
- tapered
- protuberance
- ripple
- tapered protuberance
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- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 22
- 239000011324 bead Substances 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000003042 antagnostic effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 101100135641 Caenorhabditis elegans par-3 gene Proteins 0.000 description 2
- 206010019196 Head injury Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- 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
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- 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
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- 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
- B62D25/12—Parts or details thereof
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Superstructure Of Vehicle (AREA)
Abstract
The invention provides an automobile hood which has an engine hood outer panel constituting an outer side part of a vehicle body of an engine hood and in the automobile hood, an inner panel made of aluminum alloy is joined to an inner side of an engine room of the engine hood outer panel. A plurality of cone-like projections 2 independently provided each other and having an apex part directed to the outer panel side are formed on the inner panel 1 with a gap. These adjacent cone-like projections 2 are connected to each other by a bead 4 provided on the inner panel 3 between these cone-like projections. With such arrangement, safety at head part collision of a pedestrian is ensured.
Description
Technical field
The present invention relates to a kind of automotive hood, even pedestrian's head bumps against any part of this automotive hood, the head that also can alleviate the pedestrian helps pedestrian's safety because of the injured degree of collision.
Background technology
In the past, car bonnet as automobile, the general use (adorned panel or outside plate outward with the car bonnet outer panels, hereinafter to be referred as outer panels) with the inner face that is arranged at this outer panels, as wainscot (interior panel or the inner panel of the strengthening part of outer panels, hereinafter to be referred as wainscot) one engages, and be provided with the composite panel in space between the two.
In these composite panels, wainscot particularly in order to realize lightweight, has brought into use the high strength such as 3000 series, 5000 series, 6000 series, 7000 series of AA or JIS standard, the aluminium alloy plate of high formability to replace employed in the past steel plate.
As the wainscot of this aluminum alloy system, for lightweight, have and remove panel is local, and by beam profile plate that a plurality of beam constituted.For the wainscot of steel plate system, carried out this utilization and removed and the lightweight of realization in the past.
Be directed to this, as the wainscot of aluminum alloy system, known have awl (cone) shape panel that a plurality of projections are set on the surface.This tapered panel, car bonnet 11 as automobile represented among Fig. 7 12, on the wainscot 1 that constitutes car bonnet 11, form a plurality of tapered protuberances 2 with interval top 6 outer panels 5 sides toward the outer side, separate that make, Fig. 8 has represented the block diagram of this tapered protuberance 2, is made of the top 6 of general planar and the bigger independently projection (protuberance) frustum of a cone (cross section is trapezoidal shape), that be called awl (cone) that the inclined-plane 7 that enlarges gradually constitutes.Be flat part or recess 3 between this tapered protuberance 2 and the protuberance 2.
In the automotive engine skin plate, on thin plateization and weight-saving basis, also pursue high rigidity, require bending stiffness, torsion rigidity and stretching rigidity (Dent resistance) height as characteristics of components.
Be directed to this, described tapered wainscot is compared with beam type wainscot, has the high torsion rigidity about 1.2 times.So this tapered wainscot even compare with beam type wainscot and flat panel, even do not increase thickness of slab, even the attenuate thickness of slab, also can improve the rigidity of composite panels such as automotive hood, weight-saving effect height.
But, in recent years,, on the basis of these lightweights and high rigidization, proposed to guarantee the new demand of the safety when colliding again with the pedestrian for automotive hood etc.More specifically, in automotive hood, the safety when colliding with pedestrian's head requires HIC value (HeadInjury Criteria, head injury value) low.So, even above-mentioned tapered panel also requires to reduce the HIC value, the safety when guaranteeing pedestrian's head impact.
By Fig. 6 A, Fig. 6 B of the effect of expression aftermentioned embodiment, the acceleration/accel and the time relation (Fig. 6 B) that during to pedestrian's head impact the relation (Fig. 6 A) of acceleration/accel and the stroke of head are reached head are illustrated.Each curve among Fig. 6 A, Fig. 6 B is made of first (first ripple) peak value P1 and second (second ripple) peak value P2.Peak value P1 is out of shape by the collision of pedestrian's head and automotive hood, automotive hood and shows.Peak value 2 is that the automotive engine skin plate is owing to pedestrian's head impact is out of shape, with inner matter (hereinafter to be referred as the driving engine) antagonistic force that secondary collision produced as the engine room of rigid body.The HIC value is by to carrying out integration to the acceleration/accel of head and the curve of time and try to achieve among Fig. 6 B.Under the situation of engine embedded thing and car bonnet panel nearer (distance is short), for this HIC value is suppressed at below 1000, the peak value P1 among Fig. 6 A, Fig. 6 B is risen, peak value P2 descends.
In this, tapered wainscot is compared with above-mentioned beam type wainscot, and the peak value P1 of the head acceleration during pedestrian's head primary collision is big.This is because tapered wainscot because of there being tapered protuberance, can disperse impacting with pedestrian's head impact the time, and the impact absorption amount is increased.
But, particularly in wainscot, and the position of the narrow gaps between the rigid body thing in the automotive hood such as driving engine, i.e. the position on the positive top of driving engine (position that symbol 13 encloses among Fig. 7) etc. in the wainscot, even tapered panel, situation is also relatively severeer.Be pedestrian's head and this wainscot position when colliding, because the wainscot (car bonnet) of distortion and driving engine generation secondary collision as rigid body, so the possibility that peak value 2 is increased is arranged.In other words, even tapered wainscot, at the position on the positive top of driving engine (symbol 13), for example with the gap of driving engine under the narrow situation below the 50mm, peak value P2 is increased.
And, tapered protuberance in tapered wainscot and the clearance portion between the tapered protuberance lower part of rigidity of grading, (flat part among Fig. 6 A, Fig. 6 B or recess 3) also can increase at the deflection of the situation lower faceplate that collides with pedestrian's head.Therefore, on the top of the driving engine of above-mentioned narrow gaps etc., the body panel of distortion and driving engine generation secondary collision as rigid body have the possibility that peak value P2 is increased.So, even under the situation of tapered panel, consider the panel position of described narrow gaps and the collision of the compartment between tapered protuberance and pedestrian's head, still have the leeway of improving crash survivability.
Be directed to this, proposed the improvement scheme of multiple tapered wainscot in the past.For example, following motion is arranged: the height (degree of depth) that makes in the car bonnet tapered protuberance in the tapered wainscot position with rigid body thing opposite face such as driving engine than other not with the height low (shallow) of the tapered protuberance of rigid body thing opposite face, (spy opens the 2000-168622 communique to increase gap between rigid body thing such as driving engine and the tapered wainscot, 1～3 page, Fig. 1).
And, tapered protuberance top end face (raised face) normally smooth, also proposed recess, step, breach, crack or thickness of slab minimizing portion etc. are set on this top end face (raised face (RF)), the scheme of improper local shape (the irregular part of shape) has been set.In this technology in the past, body panel and pedestrian's head collides, even secondary collision takes place the object (rigid body) in body panel and the car body, the distortion of the projection of body panel (damaging by pressure) can concentrate on raised face (RF) (particularly raised face (RF) top) with lower load.Like this, by the local deformation of this projection, in the time of can alleviating described secondary collision to the antagonistic force of pedestrian's head (open the 2003-54449 communique with reference to the spy, 1～3 page, Fig. 1).
And, also have around the tapered protuberance of tapered wainscot a plurality of through holes are set, reduce the rigidity of the residing faceplate part of through hole, even when pedestrian and any part collide; The also motion that the value of described HIC can be suppressed lower (spy opens the 2003-191865 communique, and 1～3 page, Fig. 2).
And then, other also have, the mitigation and the absorption of impact when strengthening car bonnet panel and collision usually is provided with the motion of glass wool outside between panel and the wainscot.And, be associated therewith, also have outside that the inboard of panel is provided with no rigidity, have quality materialses such as the soft board of quality or α gel motion (spy opens flat 6-239268 communique, 1～3 page, Fig. 2).
But, in these technology in the past,, all adopting under the situation of aluminium alloy plate at the outer panels and the wainscot of automotive hood for lightweight, the force of inertia during pedestrian's head impact (relevant with the quality and the rigidity of panel) reduces.Therefore, even tapered wainscot, the uptake deficiency of energy when pedestrian's head primary collision is also arranged, the possibility that head acceleration peak value P1 can not increase.
And, the spy opens 2000-168622 communique and the special technology of opening the 2003-54449 communique, in order to obtain set effect, carry out pressure forming and form tapered wainscot from flat board, and make the height (size) of the tapered protuberance of this tapered wainscot carry out various variations, perhaps at tapered protuberance improper local shape is set, this is very difficult.
And then, the tapered protuberance at tapered wainscot of opening the 2003-191865 communique the spy is provided with in the technology of a plurality of through holes on every side, because the rigidity of this through hole part reduces, so deflection increases when this part and pedestrian's head impact, on the top of the driving engine of described narrow gaps etc., body panel that distortion arranged and possibility as the driving engine generation secondary collision of rigid body.
And, in the technology of described configuration absorbing body, under the little situation in the gap of car bonnet and driving engine, the problem that antagonistic force increases on the contrary when having the collision of car bonnet panel and in-to-in driving engine.And, just can obtain this effect in order only to use absorbing body, be necessary to select to fill the amount and the material in the space between outer panels and the wainscot.Therefore exist and sacrificed the car body lightweight, and the cost that is used to fill absorbing body increases and problem such as thing followed complex operation.From this point, the technology that the spy opens in the flat 6-239268 communique also is same.
Summary of the invention
The objective of the invention is to, provide a kind of under the situation of using aluminium alloy plate as wainscot for lightweight, superior to the protectiveness of pedestrian's head when colliding with pedestrian's head, can improve the automotive hood of pedestrian's safety.
Automotive hood of the present invention is the car panel of aluminum alloy system wainscot that has the car bonnet outer panels of the car body outside portion that constitutes car bonnet and be engaged in the engine room inboard of this car bonnet outer panels.And, described wainscot has: the top forms towards described outer panels side, the a plurality of tapered protuberance of the separate configuration of devices spaced apart, and be arranged on ripple on the wainscot between the described tapered protuberance to connect described adjacent tapered protuberance mode each other.
In this case, preferred described outer panels also is an aluminum alloy system.
In the present invention, by the ripple that between the tapered protuberance of wainscot, is provided with, make between the adjacent tapered protuberance to interconnect.So, need not increase thickness of slab, just can improve rigidity as tapered wainscot.Consequently, the energy absorbing in the time of can fully guaranteeing pedestrian's head primary collision increases head acceleration peak value P1.
And, in the present invention,, can improve the rigidity of the panel of part between the tapered protuberance of tapered wainscot and the tapered protuberance by above-mentioned ripple.And ripple self also can play the function of absorption by the impact that body panel and head impact produced.Consequently, even under the situation of this gap portion and pedestrian's head impact, also can reduce the deflection of body panel, even in the top of narrow and small driving engine in described gap etc., the also possibility of body panel that can reduce to be out of shape and driving engine generation secondary collision.So can reduce the second peak value P2 of described acceleration/accel, reduce the HIC value.
Thus, the impact of the pedestrian's head in the time of can suppressing pedestrian's head impact improves its safety.
And, 2 described by the present invention, even for lightweight, the outer panels of the car bonnet of automobile and wainscot all use under the situation of aluminium alloy plate, in the present invention, because can be by the ripple that between the tapered convex of wainscot, is provided with, interconnect between the adjacent tapered protuberance and tapered protuberance, so the described force of inertia in the time of can not reducing pedestrian's head impact, and the amount of energy when guaranteeing pedestrian's head primary collision increases head acceleration peak value P1.
And then, described ripple can with tapered protuberance simultaneously, utilize pressure forming etc. to be shaped at wainscot simply from the tabular panel.
Description of drawings
Fig. 1 is the block diagram of a form of automotive hood (wainscot) in the expression embodiments of the present invention.
Fig. 2 A, Fig. 2 B are the partial enlarged drawings of the automotive hood (wainscot) of presentation graphs 1, and Fig. 2 A is the block diagram of ripple, and Fig. 2 B is partial cross section's block diagram of ripple.
Fig. 3 A, Fig. 3 B are the partial enlarged drawings of another form of expression ripple, and Fig. 3 A is the block diagram of tapered protuberance, and Fig. 3 B is partial cross section's block diagram of ripple.
Fig. 4 is the section drawing in the gap between the interior rigid body thing of automotive hood and engine room in the expression embodiments of the present invention.
Fig. 5 is the block diagram that is illustrated in the form of the automotive hood that Fig. 1 is installed on the car body.
Diagram of curves, the acceleration/accel when representing pedestrian's head impact during Fig. 6 B and the diagram of curves of time relation of relation between acceleration/accel when Fig. 6 A is expression pedestrian head impact and the stroke (displacement).
Fig. 7 is the block diagram of tapered wainscot general in the automotive hood of representing in the past.
Fig. 8 is the amplification stereogram of tapering convex in the presentation graphs 7.
The specific embodiment
Below referring to figs. 1 through Fig. 5 the automotive hood in the embodiments of the present invention is carried out specific description.Fig. 1 is the block diagram of wainscot in the automotive hood of expression present embodiment.Fig. 2 A is the partial perspective view of a form of expression ripple, and Fig. 2 B is the cross-sectional perspective view of this ripple.Fig. 3 A is the block diagram of another form of expression ripple, and Fig. 3 B is the cross-sectional perspective view of this ripple.Fig. 4 is along the section drawing of the A-A line of Fig. 1 (expression be the cross section part of wainscot and outer panels combination).Fig. 5 is the block diagram that is illustrated in the form that car bonnet of the present invention is installed on the car body.
In Fig. 1, constituting on the wainscot 1 of car bonnet devices spaced apart and form the separate tapered protuberance 2 of a plurality of tops 6 towards the outer panels side.Tapered protuberance 2 and the part between the tapered protuberance 2 on the wainscot 1 become flat board or recess 3.And then, between these adjacent tapered protuberances 2, interconnect by the ripple 4 that is provided with on the wainscot 3 between these tapered protuberances 2.
(tapered protuberance)
In the present invention, as wainscot, be that the tapered panel that is formed with the independently tapered protuberance of the outside panel side of a plurality of top surfaces with devices spaced apart is an object.As mentioned above, this tapered wainscot is compared with beam profile plate etc., has high torsion rigidity, can improve the rigidity of automotive hood composite panel, weight-saving effect height.
Tapered protuberance (projection) in the tapered wainscot, as Fig. 7, illustrated in fig. 8, having substantially smooth top 6 and the inclined-plane (hypotenuse) 7 that enlarges gradually, is by independent separately basically, is spaced from each other and the protuberance group of the roughly same or similar shape that forms constitutes.But, in tapered protuberance of the present invention, can comprise between the tapered protuberance the local protuberance group who links to each other, size such as the height of tapered protuberance and diameter or shape be because of the different protuberance group in position, and the protuberance group who is combined by them.And except tapered protuberance, if for having a shape of described hypotenuse, then suitable protuberance shape such as embossing shape also can be used.
And, constituting the shape on the inclined-plane 7 of tapered protuberance 2, its leaning angle is arbitrarily.And linearity can be selected in the inclined-plane 7 of tapered protuberance 2 in the cross section of tapered protuberance, outside (top) protruding curve-like, curve-like that inside (below) is protruding or their different shapes such as combination.And then tapered protuberance can not be the inclined-plane also, but has with respect to substantially rectangular longitudinal wall of wainscot or sidewall etc.Also have, protuberance links to each other comprehensively, loses protuberances such as the raised line shape of mutual independence or corrugated with protuberance, be not contained in scope of the present invention.
And then, for the condition and the configuration (number, interval etc.) of tapered protuberance, basic identical with the wainscot in the past that is provided with tapered protuberance.In other words, so-called a plurality of tapered protuberances mean plural tapered protuberance, and conditions such as the configuration of tapered protuberance and number can or require rigidity etc. to carry out suitable selection according to the design of body panel.But in the present invention, the purpose from the protection pedestrian must make tapered protuberance have certain density, and the situation when colliding with any part of body panel with the head the pedestrian is corresponding.Therefore; hope is to configurations such as the interval of tapered protuberance and numbers; according to size,, and carry out to protect effectively pedestrian's suitable design apart from ground-surface height, with ground angulation etc. and the forms of collision of the pedestrian's head that changes with automotive hood.
And tapered protuberance is not must be to form on the full surface of wainscot, can select the only local necessary position that is arranged on yet.And what can become problem especially in pedestrian's collision safety is the smaller body panel part in gap of driving engine and body panel, also can only with this part, body panel part corresponding wainscot position tapered protuberance be set.
(ripple)
Alleged ripple 4 among the present invention is meant shown in Fig. 2 A, Fig. 2 B and Fig. 3 A, Fig. 3 B, has the roughly semicircle and circular-arc cross sectional shape of top towards above-mentioned outer panels one side, the jog of raised line shape that extends at length direction or corrugated etc.This ripple 4 is not limited to only form one shown in Fig. 2 A, Fig. 2 B, also comprises the situation more than two of the adjacent extension of formation shown in Fig. 3 A, 3B.Owing to be subjected to the wainscot restriction of processing that is shaped, and can not increase under the situation of height of ripple, can increase the number of ripple, improve rigidity.
Here, the cross sectional shape of ripple 4 also can not be a semi-circular shape or circular-arc roughly, can suitably select can be shaped, can effectively improve the wainscot rigid shape.And then the top 4a of ripple 4 also might not be only towards the outer panels side, even all or part of under the situation of engine room side, also have the effect that improves rigidity.According to panel-shaped and the position around the ripple, aspect shaping processing, convex surface is difficult to towards the situation of outer panels one side etc. down, even at convex surface under the situation of engine room one side processing, also have the effect that improves rigidity.
Shown in Fig. 1, Fig. 2 A, Fig. 3 A etc., tapered protuberance 2 with the corresponding position, top of driving engine of wainscot central portion or described narrow gaps etc., because it is on every side around the tapered protuberance 2 that disposes other, so interconnect by each ripple 4 and its other tapered protuberance 2 on every side.Be directed to this, with the tapered protuberance 2 at corresponding position beyond the top of the driving engine of wainscot periphery and described narrow gaps etc., compare with above-mentioned tapered protuberance, adjacent tapered protuberance is few, and correspondingly, the number of bonded assembly ripple 4 also reduces.Also have, the configuration of ripple 4 also can all not be connected between the adjacent tapered protuberance that forms on the wainscot.For example, can be only be provided with easily and between the tapered protuberance of the car bonnet central part of pedestrian's head impact etc. and the tapered protuberance.In addition, also can be as a tapered protuberance, not all to link to each other with other tapered protuberance adjacent to this tapered protuberance by ripple 4.
(function of ripple)
Then, the function to above-mentioned ripple 4 is illustrated.When pedestrian's head impact, automotive hood is out of shape to the engine room direction owing to the distortion of outer panels and wainscot.And in this when collision, each ripple 4 can improve tapered wainscot 1 self rigidity and the tapered protuberance 2 panel rigidity with the part between the tapered protuberance 2.And the top 4a of each ripple 4 self can end compression bursts and is out of shape the function of the impact that is produced when playing absorption by body panel and head impact.
Consequently, even for lightweight, in the outer panels of automotive hood and wainscot, all use under the situation of aluminium alloy plate, described force of inertia in the time of also can not reducing pedestrian's head impact, amount of energy when fully guaranteeing pedestrian's head primary collision increases head acceleration peak value P1.And, even under the situation that gap portion between the tapered protuberance 2 and pedestrian's head collides, also can reduce the deflection of body panel, even top at driving engine of described narrow gaps etc., also can reduce the possibility of the body panel and the driving engine generation secondary collision of distortion, the second peak value P2 of described acceleration/accel can be reduced, therefore, described HIC value can be reduced.
In order to make ripple bring into play these functions, on the basis of the method to set up of described ripple, also should design shape and sizes such as the height of ripple and width, must have size to a certain degree.
(automotive hood)
Then, use Fig. 4, Fig. 5 that the situation that this wainscot is applied to automotive hood is illustrated.Fig. 4 is that the wainscot 1 of presentation graphs 1 engages with outer panels, constitutes the section drawing of a form of automotive hood.
In Fig. 4, by pressure forming etc. and be formed with the wainscot of each ripple 4 simultaneously, engage, as automotive hood and integrated with the outer panels 5 that has corresponding to car body design-calculated certain curvature with each tapered protuberance 2.
In the figure, on the top 6 of the tapered protuberance 2 of wainscot 1, dispose resin bed 9.And by this resin bed 9, the top 6 of the tapered protuberance 2 of wainscot 1 is bonded with each other with the back side of outer panels 5.And chimeric by with by the formed kink 8a such as bending machining of the circumference 8 of outer panels 5 makes the circumference 1a of wainscot 1 and outer panels 5 integrated.In Fig. 4, symbol 10 is inner matters such as driving engine, and gap S is the bottom (par 3) of expression wainscot 1 and the distance of engine room 10.
And, represent the automotive hood 11 of this Fig. 4 is installed on the form of automobile 12 among Fig. 5 with block diagram.Also have, in the automotive hood 11 of present embodiment, can be suitable for necessary ripple and anchor clamps etc. in the automotive hood, and panel and panel between, car body panel joint method and the automotive engine cover structure known altogether with the joint method of other body part and panel etc.
In the present invention, as employed material in the automotive hood, wainscot is an aluminum alloy system, and outer panels can also be used steel plate or resin board except the aluminum alloy system.Automotive hood of the present invention, irrelevant with the material of different outer panels and bring into play its effect.Therefore, can as wainscot, change the material of outer panels and wainscot with aluminium alloy plate with steel plate as outer panels.But the material of panel and wainscot adopts under the situation of aluminium alloy plate equally outside, has the further lightweight that can reach automotive hood and the advantage of pedestrian's protectiveness.
In this case, in outer panels and the wainscot, as mentioned above, on thin plateization and weight-saving basis, pursue high rigidity.As characteristics of components, demanding bending stiffness, torsional rigid or stretching rigidity.But, under the blocked up situation of the thickness of these panels, or outside under the too high situation of the intensity of panel and wainscot,, the unnecessarily too high possibility of integral rigidity that makes composite panel (car bonnet) is just arranged by connecting tapered protuberance 2 by ripple 4.Consequently, there is to make the peak value of first ripple that takes place by the primary collision of pedestrian and panel too high the possibility that the HIC value also increases.Therefore, when on wainscot, forming ripple 4, the thickness of outer panels and wainscot and intensity, hope can alternative condition so that the peak value of this first ripple can be not too high.Under the situation that is suitable for general outer panels,, think that HIC value in the primary collision is above 1000 if when the thickness summation of outer panels and wainscot surpasses 3mm.
Also have, at wainscot is under the situation of aluminum alloy, even in the raw MAT'L aluminium alloy plate, the panel material of using as the particularly wainscot thin plate below the 1.2mm, viewpoint from high formability and high strength (yield strength), wish to use the Al-Mg-Si system (6000 are) and the Al-Mg system aluminium alloy plates such as (5000 are) that can reach the lightweight purpose, but, if can satisfy panel requirement performance, except 6000 be and 5000 be, also can use 3000 to be and 7000 to be to wait other various aluminium alloy plates.
Then, about the tapered wainscot (example) of Fig. 1 and the tapered wainscot of Fig. 7 (example in the past), Fig. 6 represents to suppose under the situation that (par 3) and pedestrian's head collide between the tapered protuberance 2 and tapered protuberance 2 of central portion of wainscot, the analysis result of acceleration/accel one displacement curve.And the gap of supposing car bonnet in-to-in driving engine and wainscot is 40mm.
Also have, use FEM to resolve, suppose that hitting part carries out modelling by the oblique upper case of collision between two tapered protuberances 2.Tapered protuberance 2 according in number among each figure and the mutual protuberance in the heart interval (160mm) and configuration forms, the size of tapered protuberance 2, identical in each example.Frustum of a cone bottom surface diameter L2 shown in Figure 8 is 140mm, and the diameter L1 of top (top) is 20mm, and height h is 30mm.
The ripple 4 of tapered wainscot example as shown in Figure 1, is the structures that all link to each other between the adjacent tapered protuberance 2.The size of ripple 4 all is width 20mm, the cardinal principle semi-circular cross-section of height 5mm.
And the raw material plate of tapered wainscot supposes it is 6016 aluminium alloy plates of thickness 0.8mm, and carried out the baking vanish processing, as having carried out the material that artificial aging is handled after solutionizing and the Quenching Treatment, mechanical property is pulling strengrth 287MPa, yield strength 200MPa, stretch ratio 26.3%.
To above analysis result, when having represented pedestrian's head impact respectively among Fig. 6 A, Fig. 6 B to the relation of the acceleration/accel and the stroke (displacement) of head, and to head acceleration and time relation.In Fig. 6 A, Fig. 6 B, the example in the past 1 that long and short dash line is represented is not for connecting the situation of ripply tapered wainscot in the past.In the past in the example 1, though a minor peaks is higher, acceleration/accel in two minor peaks P2 (to the antagonistic force of head) rises at this.So under the little situation in the gap of inner matters such as body panel (car bonnet panel) and driving engine, prediction HIC value has can't be lower than 1000 possibility.
And, the example of the situation that the example in the past 2 that dotted line is represented is supposition pedestrian head impacts to the beam of in the past beam type wainscot.In the past in the example 2, a minor peaks P1 is low, can fully not absorb the energy of collision at this.Therefore, improve, under the little situation in the gap of body panel and driving engine etc., predict that the HIC value can't be lower than 1000 possibility height at two minor peaks P2.
For this, the tapered wainscot (example) that is all linked to each other by ripple 4 between the represented adjacent tapered protuberance 2 of solid line is compared with example 1 in the past, and a minor peaks P1 is big.And two minor peaks P2 of example are than example 1 was little in the past.So, according to connecting tapered protuberance 2 tapered wainscot each other by ripple 4, even between tapered protuberance 2 and tapered protuberance 2 with pedestrian's head impact, and under the little situation in the gap between body panel and the driving engine etc., also the HIC value can be reduced to below 1000 pedestrian's safety when guaranteeing head impact.
As described above, according to the present invention, even all adopt at automotive hood under the situation of aluminum alloy, and between tapered protuberance 2 and the tapered protuberance 2 with the situation of pedestrian's head impact under, and then under little situation such as the gap between body panel and the driving engine etc., also can provide the HIC value is reduced to below 1000 the automotive hood of pedestrian's safety when guaranteeing head impact.
Claims (5)
1. an automotive hood has
Constitute car bonnet the car body outside portion the car bonnet outer panels and
Be engaged in the aluminum alloy system wainscot of the engine room inboard of this car bonnet outer panels;
It is characterized in that: described wainscot has:
The top forms towards described outer panels side, a plurality of tapered protuberance of the separate configuration of devices spaced apart and
Be arranged on ripple on the wainscot between the described tapered protuberance to connect described adjacent tapered protuberance mode each other.
2. automotive hood according to claim 1 is characterized in that: described outer panels is an aluminum alloy system.
3. automotive hood according to claim 1 and 2 is characterized in that: described ripple and described tapered protuberance are shaped by the tabular panel is carried out pressure forming simultaneously.
4. according to each described automotive hood in the claim 1～3, it is characterized in that: the inclined-plane of described tapered protuberance is linearity, protruding curve-like, protruding curve-like or their combination to the inside laterally on the cross section of tapered protuberance.
5. according to each described automotive hood in the claim 1～4, it is characterized in that: described ripple is circular-arc or semicircle shape on the cross-sectional plane of described ripple.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003430261 | 2003-12-25 | ||
| JP2003430261A JP4332026B2 (en) | 2003-12-25 | 2003-12-25 | Car hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1636817A true CN1636817A (en) | 2005-07-13 |
| CN100391775C CN100391775C (en) | 2008-06-04 |
Family
ID=34736334
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101036581A Expired - Fee Related CN100391775C (en) | 2003-12-25 | 2004-12-24 | Vehicle engine hood |
| CNU2004201166684U Expired - Fee Related CN2767285Y (en) | 2003-12-25 | 2004-12-24 | Car engine hood |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004201166684U Expired - Fee Related CN2767285Y (en) | 2003-12-25 | 2004-12-24 | Car engine hood |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4332026B2 (en) |
| CN (2) | CN100391775C (en) |
| DE (1) | DE102004061303B4 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101223078B (en) * | 2005-07-18 | 2010-05-19 | 雷诺股份公司 | Motor vehicle front hood |
| WO2011097791A1 (en) * | 2010-02-09 | 2011-08-18 | Basf (China) Company Limited | Engine hood |
| CN104973139A (en) * | 2014-04-09 | 2015-10-14 | 株式会社神户制钢所 | Vehicle hood |
| CN109863077A (en) * | 2016-10-24 | 2019-06-07 | 本田技研工业株式会社 | The manufacturing method of automobile bottom board and automobile bottom board |
| CN110065538A (en) * | 2019-05-23 | 2019-07-30 | 崔鹏 | A kind of automobile light-duty multifunctional hood |
| CN115335277A (en) * | 2020-03-30 | 2022-11-11 | 日本制铁株式会社 | Automobile engine cover |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4332026B2 (en) * | 2003-12-25 | 2009-09-16 | トヨタ自動車株式会社 | Car hood |
| 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 |
| JP5046656B2 (en) * | 2006-06-26 | 2012-10-10 | 新日本製鐵株式会社 | Automotive food panels with excellent pedestrian protection |
| JP2008168844A (en) * | 2007-01-15 | 2008-07-24 | Nippon Steel Corp | Hood panel for automobile having excellent pedestrian protecting performance |
| CN101626943B (en) * | 2007-03-07 | 2011-08-03 | 美铝公司 | Pedestrian safe automotive hood having reinforcing foam |
| FR2914266B1 (en) * | 2007-03-28 | 2010-01-08 | Peugeot Citroen Automobiles Sa | HOOD WITH REINFORCED LINING FOR VEHICLE. |
| GB2434125A (en) * | 2007-04-17 | 2007-07-18 | Novelis Inc | Sheet member with part-conical elements providing impact protection |
| KR100872930B1 (en) * | 2007-08-09 | 2008-12-08 | 현대자동차주식회사 | Hood panel for car |
| DE102009059984A1 (en) * | 2009-12-22 | 2011-06-30 | Volkswagen AG, 38440 | Front flap for a motor vehicle |
| US9022161B2 (en) * | 2010-07-27 | 2015-05-05 | Mahindra & Mahindra Limited | Vehicle bonnet structure for pedestrian protection |
| WO2012014230A1 (en) * | 2010-07-27 | 2012-02-02 | Mahindra & Mahindra Limited | Vehicle bonnet structure for pedestrian protection |
| CN103328311B (en) * | 2011-03-02 | 2016-03-02 | 本田技研工业株式会社 | Front hood structure for vehicle |
| DE102011117936A1 (en) * | 2011-11-08 | 2013-05-08 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Bonnet, particularly front bonnet or engine bonnet, for motor vehicle, has stiffening element provided with central piece and base, where stiffening element supports outer skin between both contact points |
| DE102011119093A1 (en) * | 2011-11-22 | 2013-05-23 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | Bonnet e.g. front opening bonnet, for motor car, has supporting element locally filling intermediate space between outer shell and stiffening layer and formed by foam, which expands in intermediate space, where layer locally supports shell |
| DE102014015536A1 (en) * | 2014-10-21 | 2016-04-21 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Hood for a motor vehicle body |
| JP6692253B2 (en) * | 2016-03-31 | 2020-05-13 | 株式会社神戸製鋼所 | Vehicle hood |
| JP6781657B2 (en) * | 2017-03-29 | 2020-11-04 | 株式会社神戸製鋼所 | Vehicle trunk lid panel |
| CN107244355A (en) * | 2017-07-24 | 2017-10-13 | 江苏莘翔机电有限公司 | A kind of lightweight automobile engine cover |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2988172B2 (en) * | 1993-02-18 | 1999-12-06 | 日産自動車株式会社 | Car hood |
| JP3697917B2 (en) * | 1998-12-11 | 2005-09-21 | 日産自動車株式会社 | Plate member structure for automobiles |
| JP2001301658A (en) * | 2000-04-25 | 2001-10-31 | Nissan Motor Co Ltd | Hood structure |
| EP1357018B1 (en) * | 2000-12-13 | 2007-02-14 | Kabushiki Kaisha Kobe Seiko Sho | Panel structure for car body hood |
| DE10104334B4 (en) * | 2001-02-01 | 2007-10-18 | Wilhelm Karmann Gmbh | Motor vehicle with a hood |
| JP3912585B2 (en) * | 2001-06-05 | 2007-05-09 | トヨタ自動車株式会社 | Body panel |
| JP3829715B2 (en) * | 2001-12-26 | 2006-10-04 | マツダ株式会社 | Bonnet structure for vehicles |
| JP4336079B2 (en) * | 2002-03-08 | 2009-09-30 | 株式会社神戸製鋼所 | Body panel |
| JP4332026B2 (en) * | 2003-12-25 | 2009-09-16 | トヨタ自動車株式会社 | Car hood |
-
2003
- 2003-12-25 JP JP2003430261A patent/JP4332026B2/en not_active Expired - Fee Related
-
2004
- 2004-12-20 DE DE102004061303A patent/DE102004061303B4/en not_active Expired - Fee Related
- 2004-12-24 CN CNB2004101036581A patent/CN100391775C/en not_active Expired - Fee Related
- 2004-12-24 CN CNU2004201166684U patent/CN2767285Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101223078B (en) * | 2005-07-18 | 2010-05-19 | 雷诺股份公司 | Motor vehicle front hood |
| WO2011097791A1 (en) * | 2010-02-09 | 2011-08-18 | Basf (China) Company Limited | Engine hood |
| EP2534030A1 (en) * | 2010-02-09 | 2012-12-19 | Basf Se | Engine hood |
| EP2534030A4 (en) * | 2010-02-09 | 2013-07-24 | Basf Se | Engine hood |
| CN104973139A (en) * | 2014-04-09 | 2015-10-14 | 株式会社神户制钢所 | Vehicle hood |
| CN104973139B (en) * | 2014-04-09 | 2017-06-13 | 株式会社神户制钢所 | Engine cover for vehicle |
| CN109863077A (en) * | 2016-10-24 | 2019-06-07 | 本田技研工业株式会社 | The manufacturing method of automobile bottom board and automobile bottom board |
| US11230082B2 (en) | 2016-10-24 | 2022-01-25 | Honda Motor Co., Ltd. | Automobile floor panel and automobile floor panel manufacturing method |
| CN110065538A (en) * | 2019-05-23 | 2019-07-30 | 崔鹏 | A kind of automobile light-duty multifunctional hood |
| CN110065538B (en) * | 2019-05-23 | 2021-02-12 | 崔鹏 | Light multifunctional engine cover for automobile |
| CN115335277A (en) * | 2020-03-30 | 2022-11-11 | 日本制铁株式会社 | Automobile engine cover |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4332026B2 (en) | 2009-09-16 |
| CN100391775C (en) | 2008-06-04 |
| DE102004061303B4 (en) | 2008-10-16 |
| DE102004061303A1 (en) | 2005-08-04 |
| CN2767285Y (en) | 2006-03-29 |
| JP2005186766A (en) | 2005-07-14 |
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Granted publication date: 20080604 Termination date: 20201224 |