CN1164207A - Means and method for filling airbag - Google Patents

Abstract

The present invention relates to apparatus for filling an empty, flexible container with gas essentially instantaneously when subjected to powerful retardation forces, wherein the gas-filled container functions as a force-absorbing cushion which protects against injuries, wherein the apparatus includes pressure receptacles which is filled with gas under high pressure, a conduit, means for opening the connection between the receptacles and the container when subjected to retardation forces that exceed a smallest value, a container-holding device, and a retardation meter. One pressure receptacle contains oxygen and an inert gas while the other receptacle contains inert gas and hydrogen.

Description

The apparatus and method of filling airbag

The present invention relates to a kind of device, moment was with this container of gas inflation when the automobile of the container that it is can be in that a sky is housed flexible was subjected to powerful deceleration force, when the collision accident for example took place, said container was tending towards making the personnel that take in the automobile so as not to sustaining an injury or reducing the degree of injury.

Some car equipment airbag is as the substitute or the fill-in of safety strap.When the collision accident took place, airbag can be got up by inflation as quick as thought in driver or passenger's front, driver or passenger was avoided otherwise the injury that can be subjected to, and threw to the place ahead as quilt and hit on the control wheel (bearing circle) or instrument carrier panel at vehicle.

Also not having automobile when presents is drafted is rear rider equipment airbag.This may be to need very big airbag because of the back seat at vehicle, and this may involve the many problems that belong to gas kinetics character purely.

When the collision accident of the collision that takes place to come on the opposite or other patterns, vehicle is stopped suddenly, at this moment driver or passenger continue to travel forward with the original speed of vehicle, will impinge upon the back of front stall or dished out and hit on control wheel and/or instrument carrier panel, therefore must get up the airbag inflation before this.

In order to obtain the actv. protection, estimate that airbag or similar cushion rubber must get up in inflation in a centisecond.

Suppose that automobile travels with 110 kilometers/hour speed when taking place to collide, the personnel that ride in this time in the car will be with respect to the earth through one section distance that is about rice.Because the vehicle entity can't stop at once, can bend inwards through one or the situation of several decimeters distance according to the forward position of vehicle, vehicle drivers or the passenger that in car, takes will be in 0.01 second time with respect to car body through one section distance that is about to two decimeter, the free inflation of cushion or airbag is in this case got up, and can so as to prevent driver or passenger by throwing to the backrest of control wheel, instrument carrier panel or front stall.

Under the situation of a gas at positive energy exchange (constant enthalpy) not, resemble under this situation and expand, according to so-called Jiao Er-Thomson effect, temperature can descend usually.

Under the situation of air or nitrogen, when making it expand into for 2 whens crust from 400 crust, temperature will descend approximately and from 70 to 100 to spend.When this gas is stored in the high pressure vessel, for example under the situation of using airbag, or corresponding heat must be supplied with this gas so that the volume that obtains at room temperature should obtaining, or pressure container must more than enrich with about 30% gases.

Except this temperature descends, also must remember, air, nitrogen and other gas compressible factor when 400 crust is about 1.2, this point must be considered when design airbag size, because otherwise, with idea1 gas situation about having is compared, pressure or volume just must be increased to corresponding degree.

Another problem that all can run into all heavy gases is that the speed ratio that this moment, gas flowed out is lower, because this gas flow rate is the function of mol wt and temperature.

An object of the present invention is to provide a kind of apparatus and method, it can enrich a sky and flexible container or cushion rubber with gas in moment when great collision accident takes place vehicle, this container or cushion rubber are former to be contained in the car, said gas filed container can play the effect of the cushion rubber of an energy absorption power, therefore can reduce the degree that is hurt.This device has a container that is filled with high pressure gas, article one, high pressure vessel is connected to the pipeline of inflatable container, deceleration force when vehicle is used for opening bonded assembly device between high pressure vessel and flexible cell when surpassing a certain minimum value, a flexible cell holding device and a decelerometer.

According to the present invention, this purpose is to realize with the apparatus and method with listed feature in the independent claims of apparatus and method.Actv. embodiment is then limited in dependent claims.

In conjunction with the accompanying drawings the present invention is done more detailed explanation now.In the accompanying drawings, Fig. 1 schematically illustrates two gas containers and is connected on the pipeline, and this pipeline is connected to again on the substantial gas cushion pad of a part; Fig. 2 schematically illustrates another embodiment, wherein two gas containers each with a discrete plumbing connection to gas cushion pad.

Figure 1 shows that one leads to the trunk line 5 of gas cushion pad 8, shown in cushion rubber part enrich.Gas cushion pad is installed in the clamper (retainer) 7.The end 6 punishment forks away from gas cushion pad 8 of trunk line 5 become two connecting tubes 3 and 4, are connected respectively to pressurization-gas cascade 1 and 2. Gas container 1 and 2 outlet are provided with weak link, it for example is the form of explosion plate or disk, its effect is for the gas in each container provides instantaneous clear passage, and the clear passage of this gas is that deceleration force when having an accident (impulsive contact force) is powerful produced simultaneously under the situation that enough makes the plate explosion.Container 1 and 2 contains the substantial required gas volume of gas cushion pad jointly.

Empty gas cushion pad 8 is fixed in the clamper 7.It can be that spark generator is installed in and is responsible in 5 near its outlet towards gas cushion pad 8 that one means of ignition is arranged, and perhaps can be contained near the outlet of clamper 7, perhaps can be contained in the outlet of contiguous trunk line 5 in the gas container.

First container 1 is filled with unreactable gas, for example the compound of argon, helium, nitrogen or two or more these gases.Container 1 also contains aerobic.The quantity by volume of the oxygen in container 1 be equivalent in two containers 1 and 2 volume of gas 2.5% to 20% between.Another container 2 also is filled with unreactable gas, and contains hydrogen, and its quantity by volume is equivalent to the 3-15% of volume of gas in two containers 1 and 2.Container 1 preferably contains identical unreactable gas or noble gas mixtures with 2.Helium is the most suitable gas.

When vehicle is subjected to powerful deceleration force, the weak link in the gas container exit is the explosion plate in a more excellent embodiment, can break, and causes an opening, and by this opening, gas just can be from two container flow to trunk line 5 at once.After the gas of a predetermined quantity flow in the flexible buffer pad 8, means of ignition just produced a spark, made the compound blast of oxygen and hydrogen and attack and formed water.Because this reaction, temperature can be improved in a large number, considerably beyond the required heat of cooling effect of compensation nitrogen and argon free expansion generation.The substantial required amount of gas of air cushioned bumping bag is significantly reduced.

Because oxygen one hydrogen mixture is stored in the same container dangerous, therefore these two kinds of gases are stored in respectively in the container 1 and 2 that separates, these two containers are opened simultaneously, and these two kinds of gases were just mixed before arriving cushion rubber.

Extremely important is that the pressure container 1,2 that is used for enriching gas cushion pad when the collision accident takes place must guarantee to accomplish not leak, and they will be after inflation in many years maintenance be pressurized to required pressure.Because it is on sale on market that highly sensitive helium leaks detector, therefore suit helium as a composition using gas in this respect.

Fig. 2 illustrates another embodiment, the pipeline 3 and 4 that it has two gas containers 1,2 and extends out respectively from this container respectively, these two pipelines 3,4 on being connected to gas cushion pad 8 time by a mixer 9, but its double as holding device is used.Mixer 9 comprises a blending box, and this chamber has many eyelets to be communicated with gas cushion pad.The air-flow that mixer is by convection into gas cushion pad 8 has only minimum resistance.In this case, means of ignition preferably is contained in the blending box.

According to the present invention, when having at least 30% to enter in the gas cushion pad 8 in the volume of gas of two gas containers, gas mixture is just lighted.This is lighted also and can be after two containers 1 and 2 are opened its to be taken place during through one section preset time.Gas cushion pad 8 will be reduced along with the time by the speed of enriching, because the differential pressures in two gas containers 1 and 2 will not allow all available gas volumes all to enrich in the gas cushion pad 8.

The temperature that makes the whole volume of gas in the gas container of lighting of gas mixture improves significantly and sharp, and the temperature that improves increases the volume of gas in the gas cushion pad significantly.According to the present invention, when having 30% process mixer in the cumulative volume of gas in container 1 and 2 at least, compound is just lighted, and the volume capacity of mixer is with respect to the volume capacity of gas cushion pad, and is less usually.But gas mixture can just be lighted when for example having only 10% volume having only a fraction of volume to arrive cushion rubber.Way is to have 75% in the volume of gas in container at least gas mixture is entered into flexible gas cushion pad before exploding in preferably.According to a suitable especially embodiment, when gas mixture is lighted, will contain 80% to 90% of volume of gas in the gas cushion pad.

Claims (10)

1, a kind of one be contained in sky on the vehicle and flexible container when being subjected to powerful deceleration force moment with the device of this container of gas inflation, wherein gas filed container (8) plays the effect of the cushion rubber of absorption power, can the protection personnel escape injury, wherein this device comprises: the pressure container (1 that under high pressure is filled with gas, 2), with pressure container (1,2) be connected to pipeline (5) on the flexible cell (8), when surpassing a minimum value, the deceleration force that is subjected to is used for opening pressure container (1,2) bonded assembly device and between the flexible cell (8), a container holding device (7), with a decelerometer, it is characterized in that: two pressure containers (1 are arranged, 2), each personal closing appliance is airtight, and each has connecting tube (3,4) be connected on the flexible cell (8); One of them pressure container (1) is filled with oxygen and unreactable gas, and another pressure container (2) is filled with said unreactable gas and hydrogen, and wherein unreactable gas is helium, argon and/or nitrogen; And in this device, be provided with means of ignition, so that be used for lighting the gas mixture in flexible cell (8).

According to the device of claim 1, it is characterized in that 2, connecting tube (3,4) extends to one in flexible cell fwd common-use tunnel (5), or be discharged into one with blending box (10) that flexible cell (8) is communicated with in.

According to the device of claim 2, it is characterized in that 3, means of ignition is contained in interior or its contiguous place of outlet of common-use tunnel (5).

According to the device of claim 2, it is characterized in that 4, means of ignition is contained in the blending box (10).

According to one or multinomial device in the above claim, it is characterized in that 5, the quantity by volume of hydrogen is equivalent to the 3-15% of volume of gas in two pressure containers.

According to one or multinomial device in the above claim, it is characterized in that 6, the quantity by volume of oxygen is equivalent to the 2.5%-20% of volume of gas in two pressure containers.

According to one or multinomial device in the above claim, it is characterized in that 7, two pressure containers have identical volume capacity.

According to one or multinomial device in the above claim, it is characterized in that 8, described unreactable gas is a helium.

9, a kind of at a sky and flexible container (8) when being subjected to powerful deceleration force in moment the method with this container of gas inflation, wherein this aeration vessel (8) play absorption power cushion rubber effect and can prevent the injury, wherein method comprises the such device of use, this device comprises two pressure containers (1,2), this two pressure container all under high pressure is filled with gas and each personal closing appliance sealing, and respectively has first and second pipelines (3,4) to receive flexible cell; One of them pressure container (1) is filled with oxygen and unreactable gas, another pressure container (2) is filled with said unreactable gas and oxygen, said unreactable gas is helium, argon and/or nitrogen, it is characterized in that available point burning device gas mixture when the gas of volume of gas enters in the flexible cell (8) in being at least two containers (1,2) of 30%.

According to the method for claim 9, it is characterized in that 10, the available point burning device is lighted gas mixture when the gas that is at least 75%, is preferably volume of gas in two containers (1,2) of 80-90% enters in the flexible cell (8).

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