CN104228955A - Liquid-filled energy absorption vehicle front longitudinal beam and vehicle comprising same - Google Patents
Liquid-filled energy absorption vehicle front longitudinal beam and vehicle comprising same Download PDFInfo
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- CN104228955A CN104228955A CN201410465705.0A CN201410465705A CN104228955A CN 104228955 A CN104228955 A CN 104228955A CN 201410465705 A CN201410465705 A CN 201410465705A CN 104228955 A CN104228955 A CN 104228955A
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Abstract
The invention discloses a liquid-filled energy absorption vehicle front longitudinal beam and a vehicle comprising the liquid-filled energy absorption vehicle front longitudinal beam. The liquid-filled energy absorption vehicle front longitudinal beam comprises a front longitudinal beam body; an energy absorption cavity is formed in the front longitudinal beam body; an energy absorption substance is filled in the energy absorption cavity; the energy absorption substance comprises nano-porous pieces after being subjected to hydrophobic treatment and inorganic salt solution or water. The liquid-filled energy absorption vehicle front longitudinal beam disclosed by the embodiment of the invention has the advantages of being simple in structure, low in manufacturing and maintenance cost and the like.
Description
Technical field
The invention belongs to vehicle passive security technical field, relate to a kind of liquid-filled energy-absorbing vehicle front side member of vehicle crash-worthiness and there is its vehicle of improving particularly.
Background technology
The front side member of vehicle is as vehicle by the main load parts after head-on crash, and the crash survivability of its energy absorption characteristics on vehicle has significant impact.Front rail structure in correlation technique is thin-wall metal pipe, after being collided, carry out apparatus with shock absorbing by plastic buckling, thus reduces the impact suffered by crew module, avoids producing the safety that large deformation threatens occupant.In order to improve the energy-absorbing level of part of vehicle front longitudinal-member structure, correlation technique proposes fills energy-absorbing material in part of vehicle front longitudinal-member, such as, disclosed in document CN103625553 A and CN103303329 A endergonic structure.But the endergonic structure in correlation technique adds the yield strength of front side member, thus increase the acceleration peak value in collision process.Too high car body acceleration will cause human body at crew module's impacted inside, form damage.
Summary of the invention
The present invention is intended to solve one of technical matters in correlation technique at least to a certain extent.For this reason, the present invention proposes a kind of novel liquid-filled energy-absorbing vehicle front side member, under the prerequisite not improving crash acceleration peak value, improves energy absorption level.
The present invention is also intended to propose a kind of vehicle with above-mentioned liquid-filled energy-absorbing vehicle front side member.
The liquid-filled energy-absorbing vehicle front side member of embodiment comprises according to a first aspect of the present invention: front side member body, in described front side member body, there is energy-absorbing chamber, be filled with energy-absorbing material in described energy-absorbing chamber, described energy-absorbing material comprises through the nanoporous part of hydrophobic process and inorganic salt solution or water.
According to the liquid-filled energy-absorbing vehicle front side member of the embodiment of the present invention have structure simple, manufacture and the advantage such as maintenance cost is low.
In addition, liquid-filled energy-absorbing vehicle front side member according to the above embodiment of the present invention can also have following additional technical characteristic:
According to one embodiment of present invention, described front side member body comprises the end cap at body and the described body two ends of sealing.
According to one embodiment of present invention, the average pore size in the hole on described nanoporous part is in the scope of 0.5 nanometer-500 nanometer, the pore volume of described nanoporous part 100 cu.mm.s/gram-2000 cu.mm.s/gram scope in, the specific surface area of described nanoporous part is in the scope of 100 meters squared per gram-1000 meters squared per gram;
Preferably, the average pore size in the hole on described porous member is in the scope of 2 nanometer-25 nanometers, the pore volume of described porous member 450 cu.mm.s/gram-650 cu.mm.s/gram scope in, the specific surface area of described porous member is in the scope of 150 meters squared per gram-500 meters squared per gram;
Further preferably, the average pore size in the hole on described porous member is in the scope of 4 nanometer-15 nanometers, the pore volume of described porous member 480 cu.mm.s/gram-620 cu.mm.s/gram scope in, the specific surface area of described porous member is in the scope of 200 meters squared per gram-350 meters squared per gram;
More preferably, the average pore size in the hole on described porous member is in the scope of 6 nanometer-10 nanometers, the pore volume of described porous member 520 cu.mm.s/gram-580 cu.mm.s/gram scope in, the specific surface area of described porous member is in the scope of 250 meters squared per gram-300 meters squared per gram.
According to one embodiment of present invention, the average pore size in the hole on described nanoporous part is 7.8 nanometers, the pore volume of described nanoporous part be 550 cu.mm.s/gram, the specific surface area of described nanoporous part is 287 meters squared per gram.
According to one embodiment of present invention, described inorganic salt solution is saturated solution.
According to one embodiment of present invention, described inorganic salt solution is one or more in lithium chloride solution, sodium chloride solution, calcium chloride solution, magnesium chloride solution, manganese chloride solution, cesium chloride solution, sodium bromide solution and Klorvess Liquid.
According to one embodiment of present invention, described nano-porous materials is permutite and/or silica gel.
Propose a kind of vehicle according to a second aspect of the invention, described vehicle comprises liquid-filled energy-absorbing vehicle front side member described according to a first aspect of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of liquid-filled energy-absorbing vehicle front side member of the present invention;
Fig. 2 is the pressure of energy-absorbing material under the quasistatic-volume variable curve of the liquid-filled energy-absorbing vehicle front side member according to the embodiment of the present invention;
Fig. 3 is the mechanical response of liquid-filled energy-absorbing vehicle front side member of the present invention under the dynamic load of 10m/s (crushing force-deformation quantity curve), and wherein dotted line is the corresponding mechanical response of the front side member of not filling energy-absorbing material under this loading environment;
Fig. 4 a is the distortion schematic diagram of front side member under the dynamic load of 10m/s (deformation quantity is 80mm place) of not filling energy-absorbing material;
Fig. 4 b is the distortion schematic diagram of liquid-filled energy-absorbing vehicle front side member of the present invention under the dynamic load of 10m/s (deformation quantity is 80mm place).
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
The invention provides a kind of vehicle.Liquid-filled energy-absorbing vehicle front side member 10 is comprised according to the vehicle of the embodiment of the present invention.
Below with reference to Fig. 1, the liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention is described.As shown in Figure 1, liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention comprises front side member body 101, there is in front side member body 101 energy-absorbing chamber, be filled with energy-absorbing material in this energy-absorbing chamber, this energy-absorbing material comprises through the nanoporous part 103 of hydrophobic process and inorganic salt solution 102 or water.In other words, this energy-absorbing material comprises and comprises nanoporous part 103 through hydrophobic process and water (such as deionized water) through the nanoporous part 103 of hydrophobic process and inorganic salt solution 102 or this energy-absorbing material.
Below with reference to Fig. 1, the working process according to the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention is described.When a vehicle is in a collision, first front side member body 101 produces initial conquassation, and occurs peak accelerator.Because this energy-absorbing material has good flowing power, therefore can not there is significant volume change in this energy-absorbing material under initial conquassation, and therefore it does not affect the collision peak accelerator of front side member body 101.
That is, due to the conquassation initial stage at front side member body 101, the flowing power of this energy-absorbing material avoids it provides longitudinal strength support to the tube wall of front side member body 101, and therefore the peak force of Collapse of Concrete does not increase.Therefore, liquid-filled energy-absorbing vehicle front side member 10 can in vehicle collisions the energy-absorbing level of the front portion of effective lifting vehicle, do not increase crash acceleration peak value simultaneously.
In follow-up Collapse of Concrete, the internal capacity of liquid-filled energy-absorbing vehicle front side member 10 constantly shrinks, and namely the volume in this energy-absorbing chamber constantly shrinks.Now, liquid-filled energy-absorbing vehicle front side member 10 starts to compress the energy-absorbing material in this energy-absorbing chamber under impact load.After being applied to the pressure on energy-absorbing material and reaching the energy-absorbing threshold value of energy-absorbing material, inorganic salt solution 102 or water start to enter in the duct of nanoporous part 103.Because nanoporous part 103 has huge specific surface area, therefore extraneous crash energy will be converted into solid liquid interface energy and heat energy in this course in large quantities, thus effectively promotes the energy-absorbing level of liquid-filled energy-absorbing vehicle front side member 10.
Fig. 2 shows the pressure of energy-absorbing material under the quasistatic-volume variable curve of the liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention.Wherein, this energy-absorbing material comprises the nanoporous silica gel that lithium chloride solution and average pore size are 7.8nm, and proportional volume is changed to the volume change of energy-absorbing material and the mass ratio of nanoporous part 103.The nanoporous part 103 adopting other inorganic salt solutions or water and have other parameters also can obtain similar result, lists no longer one by one at this.
As shown in Figure 2, after being applied to the pressure on energy-absorbing material and reaching the energy-absorbing threshold value of energy-absorbing material, inorganic salt solution 102 (lithium chloride solution) enters into overcoming capillary resistance in the duct of nanoporous part 103, thus external mechanical can be converted into solid liquid interface energy and heat energy.Particularly, the threshold pressure P on energy-absorbing material is applied to
incan be 27MPa, the energy absorption density of this nanoporous silica gel can reach more than 10J/g.
Fig. 3 shows according to the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention and the mechanical response of front side member under the dynamic load of 10m/s (crushing force-deformation quantity curve) of not filling energy-absorbing material.Wherein, the solid line in Fig. 3 is the crushing force-deformation quantity curve of the liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention, and the dotted line in Fig. 3 is the crushing force-deformation quantity curve of the front side member (existing front side member) of not filling energy-absorbing material.
Can be found by contrast crushing force-deformation quantity curve, according to energy absorbing efficiency under dynamic load of the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention far above the energy absorbing efficiency of the front side member of not filling energy-absorbing material under dynamic load (in the present embodiment, energy-absorbing total amount can be promoted more than 80% by the liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention), and do not increase peak force according to the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention.
This energy-absorbing material can improve the energy absorption level of liquid-filled energy-absorbing vehicle front side member 10 from following two aspects: the transformation of energy mechanism that 1, the solid-liquid effect of nanoporous part 103 as above and inorganic salt solution 102 or water is adjoint; 2, this energy-absorbing material is on the impact of the tube wall conquassation pattern of liquid-filled energy-absorbing vehicle front side member 10.As shown in Figure 4 b, the tube wall according to the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention will produce more less folds under compressive loading, and the energy that therefore tube wall is absorbed by plastic deformation also promotes to some extent.
Liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention passes through to fill energy-absorbing material in energy-absorbing chamber, thus when collision happens, energy-absorbing material can be made to produce large deformation by compression energy-absorbing material.The impact energy in the external world can be converted into solid liquid interface energy and heat energy thus, thus the impact suffered by crew module can be reduced, alleviate the threat suffered by occupant.
That is, can apply without the need to the structure changing front side member body 101, significantly reduce design cost and productive costs.And, the stability of front side member conquassation distortion can be improved.
Therefore, according to the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention have structure simple, manufacture and the advantage such as maintenance cost is low, good stability.And the liquid-filled energy-absorbing vehicle front side member 10 according to the embodiment of the present invention can not increase crash acceleration peak value.
The average crushing force of its operating pressure and liquid-filled energy-absorbing vehicle front side member 10 can be regulated easily, to be applicable to all kinds of vehicle and different applying working conditions by the component changing energy-absorbing material.Therefore, also there is the advantages such as applied range according to the liquid-filled energy-absorbing vehicle front side member 10 of the embodiment of the present invention.
Have that safety is high according to the vehicle of the embodiment of the present invention, low cost of manufacture, be convenient to the advantages such as maintenance.
As shown in Figure 1, in some embodiments of the invention, front side member body 101 comprises the end cap 1012 at body 1011 and sealed tube body 1011 two ends.The structure of front side member body 101 can be made thus more reasonable.
Particularly, front side member body 101 can utilize stainless steel 304 to make, and the sectional dimension of front side member body 101 is 40 millimeters × 40 millimeters, and length is 200 millimeters, and wall thickness is 1 millimeter.Body 1011 and end cap 1012 adopt welding manner to encapsulate, and form airtight energy-absorbing chamber, and assemble with front part of vehicle dependency structure.
In examples more of the present invention, the average pore size in the hole on nanoporous part 103 is in the scope of 0.5 nanometer-500 nanometer, the pore volume of nanoporous part 103 100 cu.mm.s/gram-2000 cu.mm.s/gram scope in, the specific surface area of nanoporous part 103 is in the scope of 100 meters squared per gram-1000 meters squared per gram.Can, when controlling the manufacturing cost of nanoporous part 103, make liquid-filled energy-absorbing vehicle front side member 10 can absorb more external mechanical energy thus.
Preferably, the average pore size in the hole on nanoporous part 103 is in the scope of 2 nanometer-25 nanometers, the pore volume of nanoporous part 103 450 cu.mm.s/gram-650 cu.mm.s/gram scope in, the specific surface area of nanoporous part 103 is in the scope of 150 meters squared per gram-500 meters squared per gram.Can, when controlling the manufacturing cost of nanoporous part 103, make liquid-filled energy-absorbing vehicle front side member 10 can absorb more external mechanical energy thus.
Further preferably, the average pore size in the hole on nanoporous part 103 is in the scope of 4 nanometer-15 nanometers, the pore volume of nanoporous part 103 480 cu.mm.s/gram-620 cu.mm.s/gram scope in, the specific surface area of nanoporous part 103 is in the scope of 200 meters squared per gram-350 meters squared per gram.Can, when controlling the manufacturing cost of nanoporous part 103, make liquid-filled energy-absorbing vehicle front side member 10 can absorb more external mechanical energy thus.
More preferably, the average pore size in the hole on nanoporous part 103 is in the scope of 6 nanometer-10 nanometers, the pore volume of nanoporous part 103 520 cu.mm.s/gram-580 cu.mm.s/gram scope in, the specific surface area of nanoporous part 103 is in the scope of 250 meters squared per gram-300 meters squared per gram.Can, when controlling the manufacturing cost of nanoporous part 103, make liquid-filled energy-absorbing vehicle front side member 10 can absorb more external mechanical energy thus.
Most preferably, the average pore size in the hole on nanoporous part 103 is 7.8 nanometers, the pore volume of nanoporous part 103 be 550 cu.mm.s/gram, the specific surface area of nanoporous part 103 is 287 meters squared per gram.Can, when controlling the manufacturing cost of nanoporous part 103, make liquid-filled energy-absorbing vehicle front side member 10 can absorb more external mechanical energy thus.
Preferably, inorganic salt solution 102 can be one or more in lithium chloride solution, sodium chloride solution, calcium chloride solution, magnesium chloride solution, manganese chloride solution, cesium chloride solution, sodium bromide solution and Klorvess Liquid.Wherein, inorganic salt solution 102 can utilize deionization water and minerals formulated.
Inorganic salt solution 102 can saturated solution.Such as, inorganic salt solution 102 can be saturated lithium chloride solution, saturated nacl aqueous solution, saturated calcium chloride solution, saturated magnesium chloride solution, saturated manganese chloride solution, saturated cesium chloride solution, saturated sodium bromide solution or saturated potassium chloride solution.
Wherein, the threshold pressure of saturated nacl aqueous solution is about 20MPa, and the energy-absorbing density of saturated nacl aqueous solution is about 15J/g.The threshold pressure of saturated lithium chloride solution is about 27MPa, and the energy-absorbing density of saturated lithium chloride solution is about 16J/g.The threshold pressure of saturated potassium chloride solution is about 21MPa, and the energy-absorbing density of saturated potassium chloride solution is about 15J/g.The threshold pressure of saturated sodium bromide solution is about 21MPa, and the energy-absorbing density of saturated sodium bromide solution is about 19J/g.
The threshold pressure of saturated calcium chloride solution is about 26MPa, and the energy-absorbing density of saturated calcium chloride solution is about 18J/g.The threshold pressure of saturated magnesium chloride solution is about 26MPa, and the energy-absorbing density of saturated magnesium chloride solution is about 13J/g.The threshold pressure of saturated manganese chloride solution is about 23MPa, and the energy-absorbing density of saturated manganese chloride solution is about 18J/g.The threshold pressure of saturated cesium chloride solution is about 21MPa, and the energy-absorbing density of saturated cesium chloride solution is about 14J/g.
Preferably, nanoporous part 103 can be nanoporous permutite or nanoporous silica gel.That is, nanoporous part 103 can be made up of nanoporous permutite or nanoporous silica gel.
The threshold pressure of energy-absorbing material can be changed by the kind changing nanoporous part 103 and/or inorganic salt solution 102.Particularly, the threshold pressure of energy-absorbing material can in the scope of 1MPa-100MPa.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " cw ", " conter clockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (8)
1. a liquid-filled energy-absorbing vehicle front side member, it is characterized in that, comprising: front side member body, in described front side member body, there is energy-absorbing chamber, be filled with energy-absorbing material in described energy-absorbing chamber, described energy-absorbing material comprises through the nanoporous part of hydrophobic process and inorganic salt solution or water.
2. liquid-filled energy-absorbing vehicle front side member according to claim 1, is characterized in that, described front side member body comprises the end cap at body and the described body two ends of sealing.
3. liquid-filled energy-absorbing vehicle front side member according to claim 1, it is characterized in that, the average pore size in the hole on described nanoporous part is in the scope of 0.5 nanometer-500 nanometer, the pore volume of described nanoporous part 100 cu.mm.s/gram-2000 cu.mm.s/gram scope in, the specific surface area of described nanoporous part is in the scope of 100 meters squared per gram-1000 meters squared per gram;
Preferably, the average pore size in the hole on described porous member is in the scope of 2 nanometer-25 nanometers, the pore volume of described porous member 450 cu.mm.s/gram-650 cu.mm.s/gram scope in, the specific surface area of described porous member is in the scope of 150 meters squared per gram-500 meters squared per gram;
Further preferably, the average pore size in the hole on described porous member is in the scope of 4 nanometer-15 nanometers, the pore volume of described porous member 480 cu.mm.s/gram-620 cu.mm.s/gram scope in, the specific surface area of described porous member is in the scope of 200 meters squared per gram-350 meters squared per gram;
More preferably, the average pore size in the hole on described porous member is in the scope of 6 nanometer-10 nanometers, the pore volume of described porous member 520 cu.mm.s/gram-580 cu.mm.s/gram scope in, the specific surface area of described porous member is in the scope of 250 meters squared per gram-300 meters squared per gram.
4. the liquid-filled energy-absorbing vehicle front side member according to any one of claim 1-3, it is characterized in that, the average pore size in the hole on described nanoporous part is 7.8 nanometers, the pore volume of described nanoporous part be 550 cu.mm.s/gram, the specific surface area of described nanoporous part is 287 meters squared per gram.
5. liquid-filled energy-absorbing vehicle front side member according to claim 1, is characterized in that, described inorganic salt solution is saturated solution.
6. liquid-filled energy-absorbing vehicle front side member according to claim 1 or 5, it is characterized in that, described inorganic salt solution is one or more in lithium chloride solution, sodium chloride solution, calcium chloride solution, magnesium chloride solution, manganese chloride solution, cesium chloride solution, sodium bromide solution and Klorvess Liquid.
7. liquid-filled energy-absorbing vehicle front side member according to claim 1, is characterized in that, described nano-porous materials is permutite and/or silica gel.
8. a vehicle, is characterized in that, comprises the liquid-filled energy-absorbing vehicle front side member according to any one in claim 1-7.
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| CN201410465705.0A CN104228955A (en) | 2014-09-12 | 2014-09-12 | Liquid-filled energy absorption vehicle front longitudinal beam and vehicle comprising same |
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| CN201410465705.0A CN104228955A (en) | 2014-09-12 | 2014-09-12 | Liquid-filled energy absorption vehicle front longitudinal beam and vehicle comprising same |
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Cited By (1)
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| US10442384B2 (en) | 2017-04-12 | 2019-10-15 | Ford Global Technologies, Llc | Energy-absorbing knee bolster |
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Application publication date: 20141224 |
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