DE102014010836B4 - Fluid pipe of a fluid line of a motor vehicle, motor vehicle and internal combustion engine with at least one fluid pipe - Google Patents

Abstract

Fluid tube (22) of a fluid line (18) of a motor vehicle (12) for at least one fluid, characterized in that the fluid tube (22) at least partially in the circumferential direction and / or longitudinal direction has different flexibility, wherein the fluid tube (22) support portions (34) comprising at least one stable pipe section (30) of the fluid pipe (22), at least one support section (34) having at least one flexible support element, wherein a plurality of support sections (34) are arranged side by side, wherein at least two support sections (34) 34) are arranged side by side and are secured on opposite sides, each with one end to at least one stable pipe section (30).

Description

Technical area

The invention relates to a fluid pipe of a fluid line of a motor vehicle for at least one fluid, in particular air, water, fuel or oil, in particular an internal combustion engine.

Furthermore, the invention relates to a motor vehicle with at least one fluid pipe of a fluid line for at least one fluid, in particular air, water, fuel or oil, in particular an internal combustion engine.

Moreover, the invention relates to an internal combustion engine having at least one fluid pipe of a fluid line of a motor vehicle for at least one fluid, in particular air, water, fuel or oil.

State of the art

The DE 10 2010 046 238 A1 shows a Frischluftansaugschlauch for connection to an internal combustion engine. The Frischluftansaugschlauch has at least a first and a third hose section, which are formed as connecting parts of components of the internal combustion engine made of a heat-resistant plastic material. Between the first and the third tube section, a second tube section is located, which is made of a heat-resistant material, which is made of a thermoformable plastic and has a plurality of passage openings.
From the DE 10 2013 201 866 A1 a pedestrian protection arrangement for a motor vehicle for implementing a pedestrian protection function is known, comprising an attached to the motor vehicle external body part to cover an underlying space of the motor vehicle with fixed components and a mounted on the fixed components functional component, which is below the external body part in the space above the is arranged stationary components.

Of the DE 101 44 972 C1 is to take a fluid guide with at least two members of acoustically substantially dense material and at least one opening for sound attenuation, wherein between two adjacent members an impedance change, in particular in the form of an impedance jump, the flow resistance of the fluid flowing through the fluid guide is present.
The DE 10 2006 021 386 A1 discloses an air duct for a motor vehicle, comprising a wall surrounding a channel. The wall has a first wall part made of a harder material and a second wall part made of a softer material. To produce such an air channel, a seal is injected, which contributes to the attachment of the two wall parts together.
The DE 10 2007 040 497 A1 shows an air duct for Rohluftansaugung a motor vehicle and a mounting bracket for a front end module of a motor vehicle. The air guide is formed as a hose with an air inlet opening and with an air outlet, wherein the hose is formed such that a cross section of the hose can be changed.
Of the DE 10 2004 032 597 A1 is a body cover, in particular motor vehicle bonnet, which is at least partially designed as pedestrian protection. An elastic air duct in an area designed for pedestrian protection is arranged below a cover skin.
From the JP 2007291858 A An intake line is known which forms an intake tract of an internal combustion engine of a motor vehicle. The suction line is made of a nonwoven fabric. The intake system includes a pipe main body that forms a clean air guide. Further, the intake system comprises an engaging part which is connected to an engaged part with the line main body and arranged on a filter or a frame of the motor vehicle. Portions that are in contact at least with the engaged part are formed of soft parts.

The invention has for its object to design a fluid pipe, a motor vehicle and an internal combustion engine of the type mentioned, in which a passive safety of the motor vehicle, in particular with respect to the protection of pedestrians in collisions, can be improved. Furthermore, a space utilization in the motor vehicle, in particular with respect to the fluid pipe to be improved.

Disclosure of the invention

This object is achieved in that the fluid tube has at least partially in the circumferential direction and / or longitudinal direction different flexibility.

According to the invention, the fluid pipe has different regions or pipe sections with regard to its flexibility and / or strength. The fluid pipe according to the invention is partially yielding.

Advantageously, the fluid tube may have different elasticities. Elastic pipe sections can undo an induced deformation. The fluid tube may additionally or alternatively comprise at least one wholly or partially elastic portion.

Advantageously, the fluid pipe can have at least one stable or less flexible pipe section and at least one flexible pipe section. The at least one flexible pipe section is more flexible or softer than the at least one stable pipe section.

The pipe sections may be circumferential sections, which extend in each case part-circumferentially and in the longitudinal direction of the fluid pipe. Advantageously, the pipe sections can complement each other to the entire circumference of the fluid pipe.

Advantageously, the fluid pipe can be so flexible at least in the region of the flexible pipe section that it yields in the event of a collision of a pedestrian. Advantageously, the fluid pipe with the flexible pipe section in the operating mounting state protrude into a pedestrian protection zone of the motor vehicle.

The pedestrian protection zone, which can also be referred to as a pedestrian protection area, is limited by a pedestrian protection area. The pedestrian protection surface is a virtual surface, in particular plane, which can usually be located below an engine hood of the motor vehicle. It can run parallel to the engine hood. The pedestrian protection zone can be located between the hood and the engine. There must be no components in the pedestrian protection zone that could injure a pedestrian in a collision. Any components located there must be able to yield accordingly in a collision. The pedestrian protection surface is not a fixed limit. It forms a limit that must not be exceeded with hard components. In the case of known motor vehicles, for reasons of safety, rigid lines, in particular blank air lines, must not protrude beyond the pedestrian protection surface. When using completely flexible raw air pipes, it is difficult to connect them with other components, in particular an air filter.

Due to its sectionally greater flexibility, the fluid pipe according to the invention can partially protrude into the pedestrian protection zone. The pedestrian protection area may be exceeded with the flexible pipe sections of the fluid pipe. The fluid tube can thus be placed in areas of the engine compartment that are otherwise not allowed for hard or inflexible components within the pedestrian protection zone. Thus, a space, in particular the engine compartment, of the motor vehicle can be better utilized. Space constraints or limitations, which may result from bottlenecks in lines or restrictions in air filters in the engine compartment or may be due to the dimensions of the vehicle, can be overcome.

The flexibility of the fluid pipe, in particular of the at least one flexible pipe section, can have an advantageous effect on a noise during operation. In particular, when using the fluid pipe as an air pipe, in particular unfiltered air line, so standing waves can be avoided.

With at least one stable tube section, the stability and shape of the fluid tube can be predetermined and ensured.

Furthermore, in particular by means of at least one stable pipe section, a connection of the fluid pipe can be easily realized in particular by plugging or plugging.

With the fluid pipe according to the invention correspondingly large diameters can be realized. As a result, pressure losses in the fluid pipe can be reduced. Furthermore, flow velocities in the fluid pipe can thus be reduced, which can lead to flow noise.

Advantageously, the material from which at least one pipe section is formed, have such a low inherent dimensional stability that it can be deformed with a small force, in particular by pressure changes in the fluid pipe. In particular, the material may be so flexible that it can not stably maintain its shape without another proppant.

The soft material of the at least one flexible pipe section may be embedded in a hard material or harder material of at least one stable pipe section. As a result, transitions between the pipe sections can be improved.

Advantageously, the fluid pipe may be circumferentially composed of at least one flexible pipe section and at least one stable pipe section. In this way, flexibility of the fluid tube in the circumferential direction may vary.

Advantageously, at least one stable pipe section and at least one flexible pipe section can realize a shell, in particular a half shell, of the fluid pipe. Advantageously, at least one further, in particular more stable, pipe section can be provided as a further shell, in particular a half shell, for circumferentially closing the fluid pipe.

Advantageously, at least one flexible pipe section may be at least partially permeable to fluid. In this way, a noise, in particular by standing waves, can be further reduced in the fluid pipe. The at least one flexible pipe section may be at least partially made of a fluid-permeable, in particular air-permeable, material.

Advantageously, at least one flexible pipe section may be at least partially made of a porous material. The material can advantageously be encapsulated with plastic or injected into it.

Advantageously, at least one flexible pipe section can be preformed. It may advantageously have a molded non-woven in shape.

Advantageously, at least one stable pipe section may comprise or be made of a plastic.

The fluid pipe can be used as an air pipe, in particular in conjunction with a raw air duct, an air filter or a clean air duct of an internal combustion engine, in particular as an intake manifold of an intake tract. With an air pipe according to the invention, the flow cross-sections can be easily realized, which are required due to power requirements and / or acoustic requirements for operating the internal combustion engine.

However, the invention is not limited to air pipes of internal combustion engines. Rather, it can also be used for other fluid pipes of a fluid line of motor vehicles for at least one different type of fluid, in particular water, fuel or oil. The invention can also be used outside of internal combustion engines, in particular in an interior ventilation or an air conditioning system of the motor vehicle.

According to the invention, the fluid pipe has at least one support section, which is fastened on one side to at least one stable pipe section of the fluid pipe.

Advantageously, the at least one support section can be configured so flexible that it gives way in the event of a pedestrian impact. Henceforth, in the manner in which the at least one support section in the operating assembly state protrude into a pedestrian protection zone of the motor vehicle.

Advantageously, at least one flexible pipe section of the fluid pipe with the at least one support section at least held, in particular clamped, be.

The at least one flexible pipe section can be supported by the at least one support section. In this way, with the at least one support section, the shape of the fluid pipe in the region of the at least one flexible pipe section can be maintained at least under normal operating conditions.

The at least one support section can give the at least one flexible pipe section, in particular its material, stability. The at least one support portion can ensure the necessary for operation vacuum rigidity.

At least one support portion may advantageously be pivoted, bent or broken. Advantageously, at least one free region of a support section fixed to one side, in particular pivoted, bent or possibly broken by at least one connection point with the at least one stable pipe section. Thus, in the case of a possible collision by corresponding deformation forces, the fluid pipe can easily be deformed in the region of the at least one support section and optionally of the at least one flexible pipe section.

Advantageously, the at least one support section can yield elastically, in particular, by its shape, shape, geometry, dimension and / or type of fastening. In this way, the at least one support portion can return to its shape after deformation. Also, operational vibrations can be so better attenuated, especially compensated, be. So a noise can be reduced accordingly.

Advantageously, the at least one support section can be elastic at least in sections. Advantageously, the at least one support section may comprise or be at least one elastic, in particular resilient, segment.

Advantageously, the at least one support portion may be at least partially made of a plastic or have such. Plastic can be flexible, in particular elastic.

Advantageously, at least a stable pipe section and at least one support portion integrally connected to each other. They can be realized by a plastic molding process, in particular by an injection molding or blow molding process. The at least one support section can be formed from the harder material of the at least one stable tube section. Additionally or alternatively, at least one stable pipe section and at least one support section can be realized in several parts, in particular as a two-component component or the like.

Advantageously, the at least one flexible pipe section and the at least one support section may be preformed together or separately.

Advantageously, the at least one support section may be attached to the at least one flexible pipe section or vice versa.

At least one support section can also be fastened on several sides to at least one stable pipe section of the fluid pipe.

In an advantageous embodiment, the at least one support section may have at least one flexible support element at least. The at least one support element may be part or component of the at least one support section. The at least one support portion may also consist partially or wholly of the at least one support element. The at least one flexible support element may give way in a collision. In this way, the at least one flexible pipe section can yield accordingly, so that a risk of injury to a pedestrian can be reduced. The flexibility of the at least one support element can be realized by its shape and / or its material and / or by its construction in cooperation with the at least one flexible pipe section.

Advantageously, a plurality of flexible support elements may be provided. The flexible support elements can advantageously be arranged along the at least one flexible pipe section, in particular evenly distributed. In this way, a shape can be improved. In addition, a correspondingly flexible yielding of the at least one flexible pipe section can thus be improved.

According to the invention, a plurality of support sections are arranged side by side. In this way, the at least one flexible pipe section with a plurality of support sections can be supported and / or held uniformly and / or comprehensively.

The shape of the at least one flexible pipe section can be specified and held in a simpler and more reliable manner.

According to the invention, at least two support sections are arranged side by side and fastened on opposite sides, each with one end, to at least one stable tube section. In this way, a uniform shape of the flexible pipe section can be realized. In addition, the support sections can be bent more uniformly in a possible impact.

The support portions may advantageously be arranged alternately on opposite sides. Thus, a tooth-like engagement of the adjacent support sections can be achieved. Between the support sections so the at least one flexible pipe section can be better clamped. Furthermore, the fluid pipe can yield better there.

At least two, in particular juxtaposed support portions may be secured on the same side with the same end to the at least one stable pipe section.

In a further advantageous embodiment, at least one flexible pipe section at least one flexible material, in particular nonwoven, at least have. The at least one flexible pipe section can be deformed and yielded more easily.

A fleece can be easily realized. Furthermore, it may be fluid-permeable, in particular air-permeable.

In a further advantageous embodiment, at least one support section may have at least one support arm or spring arm. In this way, a surface of the at least one support portion can be kept low. A support arm or spring arm can be easily bent. On the other hand, a support arm or a spring arm can have a sufficiently large clamping force in order to clamp the at least one flexible pipe section particularly resistant to a negative pressure in the fluid pipe.

In a further advantageous embodiment, the at least one support section can be at least partially embedded in the at least one flexible pipe section and / or placed on it.

At least one in particular harder support portion may be at least partially embedded in the at least one flexible pipe section. In this way, a stable connection between the at least one support section and the at least one flexible pipe section can be realized. Furthermore, such a space requirement can be reduced.

By embedding can also be a risk that the at least one flexible Separate pipe section of the at least one support portion, in particular tear, can be reduced. In particular, with operational vibrations so a permanent connection can be improved.

Alternatively or additionally, at least one support section may be at least partially placed on or inserted into the at least one flexible pipe section, or vice versa. In this way, another manufacturing method can be performed. In particular, the at least one support section can be prefabricated with the at least one stable tube section as a kind of framework. Subsequently, the at least one flexible pipe section can be secured on the at least one supporting section.

In a further advantageous embodiment, at least one flexible pipe section can be nationwide and / or continuous.

In a further advantageous embodiment, the fluid pipe, viewed at least in the region of at least one flexible pipe section and / or at least one support section, can be convex or concave from the outside. In this way, the fluid pipe can be adapted as needed to the operating requirements and / or the available space. Furthermore, by the shape of the at least one flexible pipe section, a deformation direction and / or deformation or deformation force and / or required deformation force can be varied. Overall pedestrian protection can be further improved.

In a further advantageous embodiment, the fluid pipe can have at least one round and / or at least one angular section in the profile, at least in the region of at least one flexible pipe section and / or the at least one support section. In this way, the fluid pipe can be adapted as needed to the operating requirements and / or the available space. Furthermore, by the shape of the at least one flexible pipe section, a deformation direction and / or deformation or deformation force and / or required deformation force can be varied. Overall pedestrian protection can be further improved.

Furthermore, the object is achieved according to the invention with the motor vehicle in that the fluid pipe has at least sections in the circumferential direction and / or longitudinal direction different flexibility.

In addition, the object is achieved according to the invention with the internal combustion engine, characterized in that the fluid pipe has at least partially in the circumferential direction and / or longitudinal direction different flexibility.

Incidentally, the features and advantages shown in connection with the fluid pipe according to the invention, the motor vehicle according to the invention and the internal combustion engine according to the invention and their respective advantageous embodiments apply mutatis mutandis and vice versa. The individual features and advantages can, of course, be combined with one another, whereby further advantageous effects can be achieved that go beyond the sum of the individual effects.

Brief description of the drawings

Further advantages, features and details of the invention will become apparent from the following description, are explained in more detail in the embodiments of the invention with reference to the drawing. The person skilled in the art will expediently also individually consider the features disclosed in the drawing, the description and the claims in combination and combine these into meaningful further combinations.

• 1 einen Motorraum eines Kraftfahrzeugs, bei dem ein flexibler Rohrabschnitt einer Rohluftleitung einer Brennkraftmaschine in eine Fußgängerschutzzone ragt;
• 2 eine Draufsicht der Rohluftleitung aus der 1;
• 3 einen Querschnitt der Rohluftleitung aus den 1 und 2;
• 4 einen Querschnitt einer Rohluftleitung gemäß einem zweiten Ausführungsbeispiel;
• 5 einen Querschnitt einer Rohluftleitung gemäß einem dritten Ausführungsbeispiel.

It show schematically

• 1 an engine compartment of a motor vehicle, in which a flexible pipe section of a raw air line of an internal combustion engine projects into a pedestrian protection zone;
• 2 a plan view of the raw air duct from the 1 ;
• 3 a cross section of the raw air line from the 1 and 2 ;
• 4 a cross section of a raw air duct according to a second embodiment;
• 5 a cross section of a raw air duct according to a third embodiment.

In the figures, the same components are provided with the same reference numerals.

Embodiment (s) of the invention

In the 1 is an engine room 10 of a motor vehicle 12 shown schematically. The engine compartment 10 is in a conventional manner with an open hood 14 , in the 1 above, closed.

In the engine compartment 10 there is an internal combustion engine 16 which in the 1 is merely indicated. The internal combustion engine 16 includes an intake tract 18 for sucking in combustion air. The intake tract 18 has an air filter 20 on, to which a raw air line 22 leads. The dirty air duct 22 has a suction port 24 , through which ambient air can be sucked.

In the 1 below the hood 14 there is a pedestrian protection area 26 in the form of a virtual plane, which is parallel to the engine hood 14 runs. An area between the pedestrian protection area 26 and the hood 14 is called a pedestrian protection zone 28 designated. In the pedestrian protection zone 28 For safety reasons, do not use hard parts of the motor vehicle 12 , For example, the raw air line 22 to protrude. All parts within the pedestrian protection zone 28 must be able to give in at a possible impact of a pedestrian.

The raw air line 22 is circumferentially composed of two shells. One of the pedestrian protection zone 28 facing, in the 1 upper, shell includes a stable pipe section 30 , In a recess of the stable pipe section 30 is a flexible pipe section 32 arranged. The flexible pipe section 32 covers the recess coherently.

The stable pipe section 30 is made of a solid plastic. The flexible pipe section 32 is made of a flexible, air-permeable fleece.

In the recess of the stable pipe section 30 for the flexible pipe section 32 sticks out, as well as in the 2 shown a plurality of elastic support spring arms 34 , In the 2 is the raw air line 22 in the area of the flexible pipe section 32 with the support spring arms 34 shown in plan view. The support spring arms 34 are each integral with the one end to the stable pipe section 30 formed. They run approximately parallel to each other. The support spring arms 34 are alternately on opposite sides of the recess in each case integral with the stable pipe section 30 connected. The support spring arms 34 are each, as in the 3 shown in cross section, bent along a virtual circular cylinder. The free ends of each adjacent support spring arms 34 overlap in the longitudinal direction of the raw air line 42 considered.

The support spring arms 34 are located on the one interior of the raw air line 22 opposite outside of the flexible pipe section 32 , The flexible pipe section 32 is planar from the inside to the support spring arms 34 created and is spanned by this. The flexible pipe section 32 is with each of the support spring arms 34 firmly connected. The support spring arms 34 hold the flexible pipe section 32 in its shape and keep the intake cross section of the raw air line 22 open. This can prevent the flexible pipe section 32 for example, at a negative pressure in the raw air line 22 can coincide.

The support spring arms 34 and the flexible pipe section 32 extend through the pedestrian protection area 26 in the pedestrian protection zone 28 , The stable pipe section 30 is outside the pedestrian protection zone 28 , in 1 below the pedestrian protection area 26 ,

Furthermore, the raw air line 22 a third, also stable pipe section 36 on. The third pipe section 36 includes the suction port 24 and is located on the pedestrian protection area 26 opposite side of the stable pipe section 30 , in 1 below. The third pipe section 36 is exemplary of the same stable plastic as the stable pipe section 30 ,

The third pipe section 36 further comprises a connection portion 38 , with which the raw air line 22 in a connecting piece 40 of the air filter 20 is plugged in.

The raw air line 22 is in the range of the flexible pipe section 32 with the support spring arms 34 convex viewed from the outside, as in the 3 is shown. The raw air line 22 has a cross section corresponding to a circular cylinder jacket. In a collision of a pedestrian, the support spring arms 34 and the flexible pipe section 32 due to its flexibility to the inside of the raw air line 22 in yield, so that a risk of injury to a pedestrian by the raw air line 22 is reduced.

For the production of the raw air line 22 be the stable pipe section 30 and 36 each formed from plastic, for example by an injection molding process. In this case, the support spring arms 34 to the stable pipe section 30 formed. The flexible pipe section 32 is pressed from fleece into its form.

The preformed flexible pipe section 32 is from the inside of the later raw air line 22 on the support spring arms 34 placed on and connected with these, for example by gluing or welding.

The stable pipe section with the flexible pipe section 32 is firmly connected to the third pipe section 36, for example glued, latched, bolted, glued, welded or the like.

Alternatively, the raw air line 22 can also be produced in other ways. The sequence of the production steps can also be changed meaningfully.

The finished raw air line 22 is connected to the connection section 38 in the connecting piece 40 of the air filter 20 for example plugged and / or fixed by means of latching and / or a hose clamp or the like.

In the 4 is a second embodiment of a raw air duct 22 shown. In contrast to the first embodiment of the 1 to 3 has the upper half shell of the raw air duct 22 with the flexible pipe section 32 and the support spring arms 34 in the second embodiment, an approximately rectangular cross-section.

In 5 is a third embodiment of a raw air duct 22 shown. In contrast to the first two embodiments, in the third embodiment, the upper half-shell of the raw air duct 22 concave shaped from the outside.

Claims (11)

Fluid tube (22) of a fluid line (18) of a motor vehicle (12) for at least one fluid, characterized in that the fluid tube (22) at least partially in the circumferential direction and / or longitudinal direction has different flexibility, wherein the fluid tube (22) support portions (34) comprising at least one stable pipe section (30) of the fluid pipe (22), at least one support section (34) having at least one flexible support element, wherein a plurality of support sections (34) are arranged side by side, wherein at least two support sections (34) 34) are arranged side by side and are secured on opposite sides, each with one end to at least one stable pipe section (30). Fluid pipe after Claim 1 , characterized in that at least one flexible pipe section (32) comprises at least one flexible material, in particular nonwoven. Fluid pipe according to one of the preceding claims, characterized in that at least one support portion (34) has at least one support arm or spring arm. Fluid pipe according to one of the preceding claims, characterized in that the at least one support portion (34) is at least partially embedded in the at least one flexible pipe section (32) and / or placed on this. Fluid pipe according to one of the preceding claims, characterized in that at least one flexible pipe section (32) is full-coverage and / or continuous. Fluid pipe according to one of the preceding claims, characterized in that the fluid pipe (22), viewed at least in the region of at least one flexible pipe section (32) and / or at least one support section (34), is convex or concave. Fluid pipe according to one of the preceding claims, characterized in that the fluid pipe (22) has at least in the region of at least one flexible pipe section (32) and / or the at least one support section (34) in profile at least one round and / or at least one angular section. Fluid pipe according to one of the preceding claims, characterized in that the fluid pipe (22) is a fluid pipe (22) of a fluid line (18) of an internal combustion engine (16). Fluid pipe (22) according to one of the preceding claims, characterized in that the fluid is air, water, fuel or oil. Motor vehicle (12) with at least one fluid pipe (22) of a fluid line (18) for at least one fluid according to one of the preceding claims, characterized in that the fluid pipe (22) at least in sections in the circumferential direction and / or longitudinal direction has different flexibility. Internal combustion engine (16) having at least one fluid tube (22) of a fluid line (18) of a motor vehicle (12) for at least one fluid according to one of Claims 1 to 9 , characterized in that the fluid pipe (22) at least in sections in the circumferential direction and / or longitudinal direction has different flexibility.

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