RU2301171C2 - Vehicle (versions) - Google Patents

Abstract

FIELD: transport engineering.

SUBSTANCE: proposed vehicle, particularly, passenger car, has load-bearing box members of body in spaces of which noise-isolating members in form of acoustic plugs 8 are locally arranged which overall passage sections of spaces with formation of limited lengths of hollow load-bearing members. Through drain and bypass holes and tubular channels are made in walls of separate limited lengths of sections of hollow members separated (formed) by end faces of acoustic plugs 8, particularly, in spaces of body floor sills. At least one of drain holes 10 is located in lowermost zone of wall 6 of body sill. Bypass hole 9 in upper wall 7 of body sill is made in form of tubular bypass air channel 16 whose inner space either completely or partially filled with high-frequency noise absorber in form of porous noise-absorbing material 13 permeable to air.

EFFECT: increased service life of structural members of body and improved acoustic comfort inside car.

12 cl, 27 dwg

Description

The invention relates to the field of mechanical engineering, in particular transport mechanical engineering, and is a construction of a wheeled vehicle, in particular a passenger car, the body power elements of which are made in the form of box-shaped hollow sections (thresholds, amplifiers, racks), which are equipped with local sealing soundproofing elements that overlap airborne sound-transmitting passage sections of hollow power elements in predetermined zones.

The car body frame is a spatial hollow power structure with interconnected air sound-transmitting channels formed by hollow power elements and in this regard communicating noisy spaces of the engine compartment and luggage compartment with the passenger compartment occupied by the driver and passengers, in which it is necessary to provide high acoustic comfort for the driver and passengers. A well-known technical solution used in the automotive industry, partially solving the problem of increasing the sound insulation of the passenger compartment space by sealing it by affecting structural elements, in particular the cavity of the hollow power elements of the body, is the use of so-called acoustic plugs (plugs), which seal the passage sections of these air channels formed by the hollow power elements of the car body frame (thresholds, struts, amplifiers). Acoustic plugs, as a rule, are a foaming polymer that is installed in a given local zone of the cavity of the power element, activated at high temperature. As the basis of the expandable polymer can be used programmed foam, elastic closed-cell polyurethane foam, thermoplastic polymer closed-cell structure. Some designs of plugs contain small through channels in their structure, providing partial removal of liquid (moisture), without efficient and complete evacuation of the specified liquid from the formed closed cavity due to the high hydraulic resistance of such channels, but only contributing to its partial evaporation due to weak blowing through the box channel through the air flow through a small-sized, with high hydroresistance channel in the plug during the movement of the car il For the fixed installation of the plug in a given local place of the hollow section of the hollow channel of the power frame of the body, it is known to use fastening brackets, welded pins, mechanical fasteners or adhesive tape. In particular, according to the known information [1] Jack Yamaguchi, Three Operating Modes of Mitsubishi's GDI V8, Automotive Engineering International, March 2000, p.28, the use of urethane plugs in the cavities of power elements of the body was noted to reduce noise levels in the passenger compartment of a Mitsubishi GDIV8. According to [2] RJChang, Bart Biche and Achilles Chiotis, Design and Acoustic Performance of Baffles Based on Programmed Heat-activated Foams, SAE TECHNICAL PAPER SERIES 1999-01-1673, reprinted from proceedings of the 1999 Noise and Vibration Conference Features of the use of the new programmed foam, activated by high temperature and used as an acoustic plug, completely sealing the cross-section of the through box channel. In the unexpanded state (prior to activation), the embedded element of the expandable polymeric material is a section of approximately two inches square. When activated during high-temperature heating (for example, the process of drying a car body at t = 140 ... 200 ° C, after the technological process of painting it), the foam directs its expansion according to the geometry of the “sewing” section in accordance with the specific geometric parameters of the section of the hollow body element . To ensure increased sound insulation provided by a foaming sealing plug, the design of the plug is double-walled (double), see figure 2 [2]. In this case, an additional soundproofing effect is realized, which is ensured by the double process of sound reflection with a double step-like change in the wave resistance of the passage of energy of sound waves through a double partition with an air gap caused by a step-like change in the stiffness and density of the structure of the stub and elastic air medium in which sound waves propagate in a hollow box channel (waveguide) sound propagation. Ensuring high sealing and sound insulation of the hollow sections of the box channels is, however, associated with a deterioration in the corrosion resistance and durability of the car body during its operation.

A known construction of an acoustic plug in the form of a thermoplastic polymer with a closed-cell structure is presented in the international patent for invention WO 01/92063 A1 [3], manufactured by Rieter Automotive International AG. The specified acoustic plug is installed in closed hollow sections of the power elements of the body frame and effectively blocks the transmission of sound waves propagating in the channels of the hollow power elements of the body into the living space of the passenger compartment of the car, which ultimately increases the acoustic comfort in the cabin. However, the use of this design is associated with a natural deterioration in the corrosion resistance of the body in the areas of hollow box-shaped elements limited by acoustic plugs due to the possible accumulation of condensate in them.

Known structural element made of foam for soundproofing cavities, a description of which is given in the patent of the Russian Federation for invention 2155689 [4]. This porous easily deformable foam element for sound insulation of cavities in a compressed state is evacuated and installed tightly in a closed shell of an airtight film to ensure its small dimensions and subsequent free entry into the cavity of the hollow element, made with the possibility of further expansion of its volumetric dimensions to obtain a limited shape at least two walls of the cavity, after entering into it by opening (tearing, piercing) the film with access of air. As a result of its elastic springy properties, in particular the polyurethane soft foam used, and at least one heavy layer consisting of a polyurethane flaky combined foam, this element overlaps the passage section of the hollow sound transmission channel, providing a certain soundproofing effect. The disadvantage of this technical solution, as well as other above-mentioned known vehicle designs, the passenger compartment (cabin) of which has improved sound insulation, in which the problem of increasing the sound insulation of the cavities of the hollow power elements of the body is solved by the use of sealed insulating plugs, the designs of which are presented in [1] - [4 ], is ineffective or completely ineffective drainage of condensate (moisture) that accumulates in the formed closed local cavities, in particular sections of floor thresholds Body limited data setting zones plugs, which eventually may reduce the corrosion resistance and durability of the vehicle during its operation. Moreover, in the presence of through holes that are not covered by technological plugs in the walls of the body thresholds, in areas limited by plugs that perform the direct function of draining the paint in the technological process of painting (after dipping the body in the painting chamber) and subsequent drying of the body, the transmission of noise energy through these technological holes in the hollow box-shaped body elements from a noisy zone of space under the body floor (noise energy transmitted from the engine compartment, noise, generated by tires, noise of transmission units, noise from an exhaust system) and then directly into the vehicle compartment through the indicated openings (open holes in the walls of the body sills serve as noise-transmitting channels from the space under the body floor to the passenger compartment space).

The proposed technical solution allows to eliminate the above disadvantages.

According to the claimed technical solution, in separate sections of the lower (bottom) and upper walls of the box-shaped hollow sections of the body floor thresholds, limited by the length of the acoustic plugs installed in them, performing additional soundproofing functions for the enclosed airspace of the passenger compartment due to the introduction of a separating insulating effect into sections of airborne sound-conducting elements connecting the inhabited airspace of a passenger compartment with noisy cavities of a motor compartment and luggage compartment, in the walls of the hollow sections of the body thresholds, drainage and bypass openings are made with at least one of the walls of the box-shaped hollow section of the floor threshold, tubular drainage ejection and / or bypass air channels communicating on one side with an open environment (space under the floor of the body), and on the other hand, with the space of the passenger compartment of the car, providing an effective output (ejection suction) generatrix during operation of the vehicle, moisture from closed (plugs) sections of the cavities of box-shaped threshold sections due to the resulting differential pressure of the air in the zones between the inner airspace of the passenger compartment (including the air cavities of the thresholds) and the outer surface of the body wall zone, under the thresholds (i.e. the resulting pressure drop due to excess air pressure in the space of the passenger compartment and the resulting vacuum formed on the outside of the lower wall of the floor threshold of the body of a moving vehicle). The internal cavity of the drainage ejection and bypass air channels is additionally fully or partially filled with a sound absorber in the form of a porous breathable sound-absorbing material (for example, fiber felt, open-cell foam, pressed metal mesh material, porous metal rubber - MP material, etc.). Moreover, due to the use of an elongated tubular outlet drainage ejection and / or bypass air channel design, an additional sound-blocking wave element for attenuating sound communication is realized, which has higher sound insulation in the low-frequency range compared to, for example, “thin” (without forming a tubular channel ) a hole of such a wave connection, made in the form of a through hole in the wall of the bottom of the body threshold, weakly blocking the intense transmission of low- and medium frequency sound energy through such a “thin” sound-transmitting element of wave communication from a noisy zone of space under the body floor (noise energy transmitted from the engine compartment, noise generated by tires, noise from transmission units, noise from the exhaust system) into the passenger compartment and passenger compartment (cab) car. The presence in the inner cavity of the drainage ejection and / or bypass air tubular channels of porous breathable high-frequency sound absorbers provides a positive effect of the additional absorption of high-frequency sound waves propagating through the formed tubular waveguide into the hollow cavity of the body frame member of the body, limited by plugs (for the option, the drainage channel or directly into the passenger compartment, for the variant - bypass channel), and then through the bypass e hole or a bypass air duct - into the interior of the passenger compartment (cabin) of the vehicle. In this case, due to the use of the porous breathable structure of sound absorbers located in the ejection drainage and / or bypass air channels, the pressure fields are balanced between the airspace of the cabin and the external environment with the corresponding implementation of the ejection effect of removing moisture from the box-shaped power element cavity (threshold) closed by acoustic plugs. bodywork.

Figure 1 presents a General view of the claimed invention as a vehicle, in particular a car, containing a power body frame, in the box elements of which acoustic plugs are used and in the walls of which (box elements bounded by acoustic plugs) drainage and bypass holes and channels are made .

Figure 2 presents a diagram of a longitudinal section of a fragment of a hollow section of a hollow body power element (in particular, a section of a body floor threshold), hermetically bounded at the ends by two end acoustic plugs, containing a through ejector in the wall on the outside of the floor threshold (from the road surface) a drainage hole made in the form of a local bent slotted slot in the wall of the body threshold, and on the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper st In the cabin located in the passenger compartment of the car, a tubular bypass air channel is installed, integrated with a porous breathable insert of a high-frequency sound absorber, which increases the sound insulation of the communication channel from noisy space under the floor of a car body.

Figure 3 presents a diagram of a cross section of a hollow section of a hollow power element of the body (in particular, the threshold of the floor of the body), hermetically limited at the ends by two end acoustic plugs, containing from the outside of the threshold of the floor (from the road surface) a through ejection drainage hole made in the form of a local bent slotted cut-out of the body threshold wall, which provides for the forced evacuation of the condensate formed from the cavity of the body's power element due to the ejecting effect caused by natural differences in air pressure in the cavity of the power element and the environment in the area of the drainage hole (vacuum), and on the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper wall there is a tubular bypass air channel integrated with a porous breathable insertion of a high-frequency sound absorber, increasing the sound insulation of the communication channel from noisy space under the floor of the body while ensuring the passage of air from the space Alon into the cavity of the hollow bearing element for subsequent sale ejection effect produced due to the pressure differential between the interior air space and suction on the outer surface of the body wall threshold.

Figure 4 presents a diagram of a longitudinal section of a hollow section of a hollow power body element (in particular, a body floor threshold), hermetically limited at the ends by two end acoustic plugs, containing a through-hole on the inside of the floor threshold (from the passenger compartment), and with on the outer side of the floor threshold (on the side of the road surface), on the outer surface of its bottom wall there is a tubular drainage ejection channel integrated with a highly porous breathable insert a frequency sound absorber that increases the sound insulation of the communication channel from the noisy space under the floor of the body and ensures the evacuation of the resulting condensate from the cavity of the body element of the body due to the ejection effect caused by differences in air pressure on both sides of the walls of the channel end sections.

Figure 5 presents a cross-sectional diagram of a hollow section of a hollow body power element (in particular, a body floor threshold), hermetically bounded at the ends by two end acoustic plugs, containing a through passage hole on the inside of the floor threshold (from the passenger compartment), and with on the outer side of the floor threshold (on the side of the road surface), on the outer surface of its bottom wall there is a tubular drainage ejection channel integrated with a porous breathable insert high frequency sound, increasing the sound insulation of the communication channel from the noisy space under the floor of the body and ensuring the evacuation of condensate from the cavity of the power element of the body due to the ejection effect caused by the difference in air pressure on both sides of the walls of the end sections of the channel (excess - in the passenger compartment and rarefaction - under threshold wall from the side of the external environment).

Figure 6 presents a diagram of a longitudinal section of a hollow section of a hollow body power element (in particular, a body floor threshold), hermetically bounded at the ends by two end acoustic plugs, containing a tubular drainage ejection channel from the outside of the floor threshold wall (from the road surface), increasing the sound insulation of the communication channel from the noisy space under the floor of the body and ensuring the evacuation of the resulting condensate from the closed cavity of the power element of the body due to the ejecting the effect caused by differences in air pressure on both sides of the walls of the end sections of the channel. On the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper wall, a tubular bypass air channel is installed, integrated with a porous breathable insert of a high-frequency sound absorber, which further increases the sound insulation of the communication channel from noisy space under the body floor.

Figure 7 presents a cross-sectional diagram of a hollow section of a hollow body power element (in particular, a body floor threshold), hermetically bounded at the ends by two end acoustic plugs, containing a tubular drainage ejection channel from the outside of the floor threshold wall (from the road surface), increasing the sound insulation of the communication channel from the noisy space under the floor of the body and ensuring the evacuation of the resulting condensate from the cavity of the body element of the body due to the ejection effect, in Rank air pressure differences on both sides of the end portions of the channel walls. On the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper wall, a tubular bypass air channel is installed, integrated with a porous breathable insert of a high-frequency sound absorber, which further increases the sound insulation of the communication channel from noisy space under the body floor.

On Fig presents a diagram of a longitudinal section of a hollow section of a hollow power element of the body (in particular, the threshold of the floor of the body), hermetically limited at the ends by two end acoustic plugs, containing from the outer side of the floor threshold (from the road surface) a tubular drainage ejection channel integrated with a porous breathable insert of a high-frequency sound absorber, which increases the sound insulation of the communication channel from the noisy space under the floor of the body and provides evacuation form egosya condensate from the body cavity of the actuator due to the ejection effect caused by air pressure differences on either side of the channel end wall portions. On the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper wall, a tubular bypass air channel is installed, which further increases the sound insulation of the communication channel from the noisy space under the body floor.

Fig. 9 is a cross-sectional diagram of a hollow portion of a hollow body power element (in particular, a body floor threshold) sealed at the ends by two end acoustic plugs containing, from the outside of the floor threshold (from the road surface), a tubular drainage ejection channel integrated with a porous breathable insert of a high-frequency sound absorber, which increases the sound insulation of the communication channel from the noisy space under the floor of the body and provides evacuation form egosya condensate from the body cavity of the actuator due to the ejection effect caused by air pressure differences on either side of the channel end wall portions. On the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper wall, a tubular bypass air channel is installed, which further increases the sound insulation of the communication channel from the noisy space under the body floor.

Figure 10 presents a diagram of a longitudinal section of a hollow section of a hollow power element of the body (in particular, the threshold of the floor of the body), hermetically bounded at the ends by two end acoustic plugs, containing on the outside of the wall of the floor threshold (from the road surface) a tubular drainage ejection channel, integrated with a porous breathable insert of a high-frequency sound absorber, increasing the sound insulation of the communication channel from noisy space under the floor of the body and providing evacuation Braz condensate from the body cavity of the actuator due to the ejection effect caused by air pressure differences on either side of the channel end wall portions. On the inner side of the floor threshold (from the passenger compartment), on the outer surface of its upper wall, a tubular bypass air channel is installed, integrated with a porous breathable insert of a high-frequency sound absorber, which further increases the sound insulation of the communication channel from noisy space under the body floor.

11 is a cross-sectional diagram of a hollow portion of a hollow body power element (in particular, a body floor threshold) sealed at the ends by two end acoustic plugs, comprising, from the outside of the floor threshold (from the road surface), a tubular drainage ejection channel integrated with a porous breathable insert of a high-frequency sound absorber, which increases the sound insulation of the communication channel from the noisy space under the floor of the body and provides evacuation form condensate from the cavity of the body’s power element due to the ejection effect caused by differences in air pressure on both sides of the walls of the end sections of the channel, and on the inner side of the floor threshold (from the passenger compartment), a tubular bypass air channel is installed on the outer surface of its upper wall, integrated with a porous breathable insert of a high-frequency sound absorber, which additionally increases the sound insulation of the communication channel from noisy space under the body floor.

On Fig presents a diagram of a longitudinal section of a hollow section of a hollow power element of the body (in particular, the threshold of the floor of the body), hermetically limited at the ends by two acoustic plugs, containing from the outside of the threshold of the floor (from the road surface) a through ejection drainage hole made in in the form of a local bent slotted slot in the wall of the body threshold, and on the inner side of the floor threshold (from the passenger compartment), on the inner surface of its upper wall, a tubular stand is installed air channel integrated with a porous breathable insert of a high-frequency sound absorber, which additionally increases the sound insulation of the communication channel between the passenger compartment (cabin) and the noisy space under the body floor due to the displaced location along the length of the limited hollow section of the body threshold end sections of the tubular bypass air channel (openings 9 and 14), with the passage area of each of the two holes 14 being fulfilled, 2 times smaller than the area of the passage section hole 9, which further improves sound insulation in the high-frequency region of the spectrum.

On Fig presents a diagram of a cross section of a hollow section of the hollow power element of the body (in particular, the threshold of the floor of the body), hermetically bounded at the ends by two acoustic plugs, containing from the outer side of the threshold of the floor (from the road surface) a through ejection drainage hole made in in the form of a local bent slotted slot in the wall of the body threshold, and on the inner side of the floor threshold (from the passenger compartment), on the inner surface of its upper wall, a tubular stand is installed air channel integrated with a porous breathable insert of a high-frequency sound absorber, which additionally increases the sound insulation of the communication channel between the passenger compartment (cabin) and the noisy space under the body floor due to the displaced location along the length of the limited hollow section of the body threshold end sections of the tubular bypass air channel (openings 9 and 14) with the passage area of each of the two holes 14 being fulfilled, 2 times smaller than the area of the passage section Ia holes 9, further improves the sound insulation in the high frequency region of the spectrum.

On Fig-15 shows the implementation of the notch in the form of an ejection hole in the lower wall of the threshold of the floor of the body, oriented in the longitudinal direction, i.e. with a 90 ° extended bend in relation to the notch execution perpendicular to the longitudinal axis of the vehicle (passenger car), which helps to reduce the turbulence of the air flow in the notch zone with a corresponding attenuation of the vortex sound generated by the free edges of the notch bend.

The positions in figures 1-15 are indicated:

1 - vehicle body (passenger car), containing box-shaped sections of the power frame;

2 - car interior;

3 - luggage compartment of the car;

4 - engine compartment;

5 is a cross-section of a box-shaped hollow power element of a body threshold;

6 - lower external (bottom) wall of the body threshold (from the side of the road surface);

7 - the upper inner wall of the threshold of the body (from the passenger compartment);

8 - acoustic plug;

9 - bypass hole (s) of the threshold of the body (from the passenger compartment), forming a bypass air channel;

10 - drainage hole of the threshold of the body (on the side of the road surface), forming a drainage ejection channel;

11 - drainage ejection channel in the form of a tubular element;

12 - the outer hole of the drainage ejection channel;

13 - porous absorber of high-frequency sound;

14 - the upper hole of the bypass air channel;

16 - bypass air channel in the form of a tubular element;

- избыточное давление воздуха в пространстве пассажирского салона (кабины) кузова легкового автомобиля;

- excessive air pressure in the space of the passenger compartment (cabin) of the car body;

- разрежение (пониженное давление), образуемое под поверхностью стенки пола кузова в зоне внешней стороны донной стенки пола (порога) кузова движущегося транспортного средства (легкового автомобиля).

- rarefaction (reduced pressure) formed under the surface of the floor wall of the body in the area of the outer side of the bottom wall of the floor (threshold) of the body of a moving vehicle (car).

In Fig.16-27 presents diagrams of various possible options for the mutual arrangement of drainage holes (drainage ejection channels) and bypass holes (bypass air channels) in the form of holes or tubular channels in the hollow power element of a car body, where:

L is the length of the air cavity inside the hollow box-shaped power element of the body floor threshold, limited at the ends by the ends of the installed acoustic plugs;

B is the width of the air cavity formed by the longitudinal opposite walls of the hollow box-shaped power element of the body floor threshold, limited by the ends of the installed acoustic plugs (average size, determined by the length L);

H is the height of the air cavity formed by the lower and upper opposite walls of the hollow box-shaped box power element of the body floor threshold, limited by the ends of the installed acoustic plugs (average size, determined by the length L);

V is the volume of the formed air cavity of the box-shaped hollow power element of the body of length L, limited by the ends of the installed acoustic plugs.

On separate sections of the upper walls 7 of the box-shaped hollow sections of the thresholds of the floor of the body 5 of limited length L, containing acoustic acoustic plugs 8 at the ends, tubular bypass air channels 16 are installed with simultaneous execution of the sections of the lower external (bottom) walls 6 of the box-shaped hollow sections of the thresholds of the body floor 5 through ejection drainage holes 10. It is also possible to perform in separate sections of the lower external (bottom) walls 6 box-like hollow sections of the thresholds of the floor of the body 5, containing boiling acoustic sealing cap 8, the tubular drainage ejecting channels 11 communicating with the environment through the drain hole 10 and the outer opening channel 12. The external opening 12 of the drain channel 11 is located by the channel opposite to the direction of vehicle forward travel (indicated by arrow). With the design of the drainage channels in the form of tubular elements, on the upper wall 7 of the box-shaped hollow sections of the thresholds of the floor of the body 5, containing acoustic acoustic plugs 8, it is possible to make a through bypass hole 9 forming a bypass air channel, or install a tubular bypass air channel 16. execution of a vehicle containing in the box-shaped power elements of the body (floor threshold) “elongated” bypass air and drainage ejecting The channels provide an effective output (suction) of the generated moisture (condensate) from the closed cavities of the box-shaped sections of the body floor thresholds, which are bounded at the ends by acoustic plugs, due to the resulting pressure drop between the air in the passenger compartment and the external air in the zone outside the body, directly near the walls 6, under the thresholds of the floor (that is, due to the formed pressure differential due to overpressure in the space of the passenger compartment, in FIGS. Shnei floor side wall of the body 6, from the road surface at the bottom wall area threshold indicated in fig.2-15 sign "-") of a moving vehicle. This ensures high soundproofing of the interior space of the body due to a significant weakening of the process of sound transmission by openings 9 and 10 and / or channels 11, 16 through the hollow box-shaped power elements of the body into the space of the passenger compartment (cabin) both from the engine compartment and the luggage compartment due to the use acoustic plugs, and from the noisy space under the floor of the body, when using elongated drainage and bypass air channels in the form of tubular elements 11 and 16, limited through openings 9, 10, 12 and 14 (with a larger mass of oscillating air column in the tubular version of the channels), i.e. providing the implementation of an inertial wave blocking element of sound communication with higher sound insulation, which ultimately creates less transfer of sound energy into the living space of the cabin (cabin) through such a wave communication element from a noisy zone of space under the body floor. At the same time, in order to obtain an additional sound-insulating effect by increasing the absorption of high-frequency noise energy transmitted through the hollow box-shaped power elements of the body into the space of the passenger compartment (cabin) of the vehicle, the internal cavity of at least one of the tubular channels (bypass air or drainage ejection) is completely or partially filled with an absorber of high-frequency sound 13 in the form of a porous breathable sound-absorbing material (for example, fiber felt, open-air plain PPU, metal wool, pressed metal mesh material, metal rubber - MR material, etc.). Specific structural options for the execution of hollow body thresholds with installed acoustic (soundproofing) plugs containing air bypass and drainage ejector tubular elements, at least one of them integrates porous high-frequency sound absorbers that increase the soundproofing of the interior space from airborne noise transmission can be different, for example, due to the tight fastening of the overhead tubular element to the opposing surfaces of individual hours s threshold metallic body in the area of the upper or lower overflow drainage holes in the walls of the body floor threshold (weld, adhesive, removable mechanical fasteners). It is possible to deliberately make depressions (punchings) in the steel walls of the lower and / or upper part of the thresholds with the subsequent installation of an adjacent shorter plate (metal, polymer) element with a length of l _t (see Figs. 4, 6), with the formation of end openings of the channels, together forming a tubular element of a given length. On Fig ... 27 presents examples of schemes of various possible options for the location of drainage and bypass holes, air bypass and ejection tubular drainage elements of the body threshold, at least one of which has porous breathable high-frequency sound absorbers, which provide, along with providing an effect ejection moisture drainage from a closed cavity of the hollow section of the threshold increased high-frequency sound insulation of the living space of the passenger compartment (cabin) of the car from the front Chi airborne airborne transmission. It is preferable to cut in the form of an ejecting hole in the lower wall of the threshold (see Fig. 14, 15) to perform longitudinal. In this case, the process of the possible generation of a turbulent whistle at the edges of the notch due to the possible disruption of the high-speed air flow under the bottom of the body in the area of the holes in the wall of the body threshold in contrast to the arrangement of the edges transverse to the longitudinal axis of the car is excluded (weakened).

Claims (12)

1. A vehicle, in particular a passenger car, containing power box elements of the body, inside the cavities of which are locally sealed soundproofing elements in the form of acoustic plugs that overlap the passage sections of the cavities with the formation of limited lengths of hollow power elements, characterized in that in the walls of the individual limited lengths sections of hollow elements, separated (formed) by the ends of the acoustic plugs, in particular, in the cavities of the thresholds of the floor of the body, bordering the space Through the passenger compartment and the external environment surrounding the vehicle body, through drainage and bypass holes and tubular channels are made, at least one of the drainage holes is located in the lowest zone of the body threshold wall, and the bypass hole in the upper wall of the body threshold made in the form of a tubular bypass air channel, the inner cavity of which is completely or partially filled with a high-frequency sound absorber in the form of a porous breathable sound-absorbing mat rial. 2. The vehicle according to claim 1, characterized in that the projections of the axes of the holes or open sections of the tubular elements on a horizontal plane are placed with an offset between themselves. 3. A vehicle, in particular a passenger car, containing power box elements of the body, inside the cavities of which are locally sealed soundproofing elements in the form of acoustic plugs that overlap the passage sections of the cavities with the formation of limited lengths of hollow power elements, characterized in that in the walls of the individual limited lengths sections of hollow elements, separated (formed) by the ends of the acoustic plugs, in particular, in the cavities of the thresholds of the floor of the body, bordering the space Through the passenger compartment and the external environment surrounding the vehicle body, through drainage and bypass openings and tubular channels are made, while in the lowest zone of the body threshold wall a tubular ejection drainage channel is installed, the inner cavity of which is completely or partially filled with a high-frequency sound absorber in the form of a porous breathable sound-absorbing material. 4. The vehicle according to claim 3, characterized in that the projections of the axes of the holes or open sections of the tubular elements on a horizontal plane are placed with an offset between themselves. 5. A vehicle, in particular a passenger car, containing power box elements of the body, inside the cavities of which locally sealing soundproofing elements in the form of acoustic plugs overlapping the passage sections of the cavities with the formation of limited lengths of hollow power elements, characterized in that in the walls of the individual limited lengths sections of hollow elements, separated (formed) by the ends of the acoustic plugs, in particular, in the cavities of the thresholds of the floor of the body, bordering the space Through the passenger compartment and the external environment surrounding the vehicle body, through drainage and bypass openings and tubular channels are made, in this case, a tubular ejection drainage channel is installed in the lowest area of the body threshold wall, and the bypass hole in the upper wall of the body threshold is made in the form of a tubular bypass air channel, the internal cavity of which is completely or partially filled with an absorber of high-frequency sound in the form of porous breathable sound-absorbing material la 6. The vehicle according to claim 5, characterized in that the projections of the axes of the holes or open sections of the tubular elements on a horizontal plane are placed with an offset between themselves. 7. A vehicle, in particular a passenger car, containing power box elements of the body, inside the cavities of which are locally sealed soundproofing elements in the form of acoustic plugs that overlap the passage sections of the cavities with the formation of limited lengths of hollow power elements, characterized in that in the walls of the individual limited lengths sections of hollow elements, separated (formed) by the ends of the acoustic plugs, in particular, in the cavities of the thresholds of the floor of the body, bordering the space Through the passenger compartment and the external environment surrounding the vehicle body, through drainage and bypass openings and tubular channels are made, while in the lowest zone of the body threshold wall a tubular ejection drainage channel is installed, the inner cavity of which is completely or partially filled with a high-frequency sound absorber in the form of a porous breathable sound-absorbing material, and the bypass hole in the upper wall of the body threshold is made in the form of a tubular bypass air channel la 8. The vehicle according to claim 7, characterized in that the projections of the axes of the holes or open sections of the tubular elements on a horizontal plane are placed with an offset between themselves. 9. A vehicle, in particular a passenger car, containing power box elements of the body, inside the cavities of which are locally sealed soundproofing elements in the form of acoustic plugs that overlap the passage sections of the cavities with the formation of limited lengths of hollow power elements, characterized in that in the walls of the individual limited lengths sections of hollow elements, separated (formed) by the ends of the acoustic plugs, in particular in the cavities of the thresholds of the floor of the body, bordering the space through the passenger compartment and the external environment surrounding the vehicle body, through drainage and bypass openings and tubular channels are made, while in the lowest zone of the body threshold wall a tubular ejection drainage channel is installed, and the bypass hole in the upper wall of the body threshold is made in the form of a tubular bypass air channel, the internal cavity of both channels is completely or partially filled with a high-frequency sound absorber in the form of a porous breathable sound-absorbing mat series. 10. The vehicle according to claim 9, characterized in that the projections of the axes of the holes or open sections of the tubular elements on a horizontal plane are placed with an offset between themselves. 11. A vehicle, in particular a passenger car, containing power box elements of the body, inside the cavities of which are locally sealed soundproofing elements in the form of acoustic plugs that overlap the passage sections of the cavities with the formation of limited lengths of hollow power elements, characterized in that in the walls of the individual limited lengths sections of hollow elements, separated (formed) by the ends of the acoustic plugs, in particular, in the cavities of the thresholds of the floor of the body, bordering the expanse Through the passenger compartment and the external environment surrounding the vehicle body, through drainage and bypass holes and tubular channels are made, at least one of the drainage holes is located in the lowest zone of the body threshold wall, and the bypass hole in the upper wall of the body threshold made in the form of a tubular bypass air channel located on the inner side of the upper wall, the inner cavity of which is completely or partially filled with a high-frequency sound absorber in the form of porous breathable sound-absorbing material. 12. The vehicle according to claim 11, characterized in that the projections of the axes of the holes or open sections of the tubular elements on a horizontal plane are placed with an offset between themselves.

Images