JPS59114167A - Structure of dash panel of automobile - Google Patents
Structure of dash panel of automobileInfo
- Publication number
- JPS59114167A JPS59114167A JP22325082A JP22325082A JPS59114167A JP S59114167 A JPS59114167 A JP S59114167A JP 22325082 A JP22325082 A JP 22325082A JP 22325082 A JP22325082 A JP 22325082A JP S59114167 A JPS59114167 A JP S59114167A
- Authority
- JP
- Japan
- Prior art keywords
- dash
- inner panel
- panel
- sound
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0815—Acoustic or thermal insulation of passenger compartments
- B60R13/083—Acoustic or thermal insulation of passenger compartments for fire walls or floors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/14—Dashboards as superstructure sub-units
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、特に遮音対策を考慮した自動屯のダッシュパ
ネルの構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the structure of a dash panel of an automatic turret, particularly taking sound insulation measures into consideration.
従来−第１図に示す如く、エンジンルーム１側の騒音が
車室２内に伝わるのを防止するために、ダッシュパネル
をダッシュインナーパネル３とダッシュアウターバネ／
Ｉ／４との二重構造にして、その間に防音材５を充填し
たものが提案されている（実開昭５３−６９９１４号）
。Conventional - As shown in FIG. 1, in order to prevent noise from the engine room 1 side from being transmitted into the passenger compartment 2, the dash panel is connected to the dash inner panel 3 and the dash outer spring/
It has been proposed to have a double structure with I/4 and fill the space with soundproofing material 5 (Utility Model Application No. 53-69914).
.
ところで、自動車の車内騒音は、第４図（ａｌ及び第４
図１ ｒｂｌに、３０００ｒＰｍ、レーシング時、前席
音の一例を示す如く、エンジン等による振動伝播音（固
体振動音）と空気伝播音とから構成され、一般的に、前
者は５００Ｈｚ以下の低周波音を支配し、後者は５ＱＱ
）ｌｚ以上の高周波音を支配するので、低周波域では振
動伝播音を少なくし、高周波域では空気伝播音を少なく
すれば、車内騒音の効果的な低減が図れることになる。By the way, the noise inside a car is shown in Figure 4 (al and 4).
As shown in Fig. 1 rbl, 3000rPm, racing, front seat sound is an example, it is composed of vibration-propagated sound (solid vibration sound) from the engine etc. and air-propagated sound, and the former generally has a low frequency of 500Hz or less. Dominates the sound of waves, the latter is 5QQ
)lz or higher, the noise inside the vehicle can be effectively reduced by reducing vibration-propagated sound in the low-frequency range and air-propagated sound in the high-frequency range.
ところが、上述の二重ダッシュパネル構造では、望気伝
播の騒音（高周波音）に対しては遮音効果が品いが、振
動伝播の騒音（低周波音）に対しては遮音効果が少ない
ので、車内騒音の効果的な低減を図ることが困難であっ
た。However, although the above-mentioned double dash panel structure has a good sound insulation effect against airborne noise (high frequency sound), it has a poor sound insulation effect against vibration propagation noise (low frequency sound). It has been difficult to effectively reduce in-vehicle noise.
本発明は、上記従来の問題点に鑑みてなされたもので、
空気伝播音の減衰に効果がある二重ダツシュ構造の採用
と相まって、振動伝播音を吸収するダイナミックダンパ
ーとして作用するダッシュアウターパネルをダッシュイ
ンナーパネルの前面にラバ一部材を介して取付けること
により、車内騒音の効果的な低減を図れるようにしたも
のである。The present invention has been made in view of the above-mentioned conventional problems.
Coupled with the adoption of a double dash structure that is effective at damping air-borne sound, the dash outer panel, which acts as a dynamic damper that absorbs vibration-borne sound, is attached to the front of the dash inner panel via a rubber piece, making it possible to improve the interior of the vehicle. This makes it possible to effectively reduce noise.
以下、本発明の実施例を添付図面について詳細に説明す
る。Embodiments of the invention will now be described in detail with reference to the accompanying drawings.
第２図及び第３図に示すように、自動車１０のエンジン
ルーム１１側と車室１２側を仕切るダッシュインナーパ
ネル１３は、フロア１４から連続してほぼ直角に立上が
り、上端部が、フロントウィンド１５を支承するカウル
ボックス１６のダッシュアッパー１７とカウルプレート
１８の両端部に接合される。カウルプレート１８の上部
にはボンネット１９が位置する。As shown in FIGS. 2 and 3, the dash inner panel 13 that partitions the engine room 11 side and the vehicle interior 12 side of the automobile 10 stands up continuously from the floor 14 at a substantially right angle, and its upper end is connected to the front window 15. It is joined to both ends of the dash upper 17 and cowl plate 18 of the cowl box 16 that supports the cowl box 16. A bonnet 19 is located above the cowl plate 18.
上記ダッシュインナーパネル１３の後面（車室１２側）
のほぼ全面には・塩化ビニールシート２０で被覆したフ
ェルト（吸音材）２１を貼付けて空気伝播音の遮音を行
なう。Rear surface of the dash inner panel 13 (vehicle compartment 12 side)
A felt (sound absorbing material) 21 covered with a vinyl chloride sheet 20 is pasted on almost the entire surface of the board to insulate airborne sound.
一方、ダッシュインナーパネル１３の前面（エンジンル
ーム１１側）のほぼ中央部には、ダッシュインナーパネ
ル１３の曲面と所定の間隔ｔをあ゛ けて横長長方形状
のダッシュアウターパネル２２を配置１．して、該ダッ
シュアウターパネル２２の四Ｉｌｌコ゛ムマウント（ラ
バ一部材）２３．・・・、２３を介してダッシュインナ
ーパネル１３に取付けている。On the other hand, a horizontally rectangular dash outer panel 22 is arranged approximately at the center of the front surface of the dash inner panel 13 (on the side of the engine room 11) with a predetermined distance t from the curved surface of the dash inner panel 13. 4Ill column mount (rubber member) 23. of the dash outer panel 22. . . , is attached to the dash inner panel 13 via 23.
上記ダッシュインナーパネル１３とダッシュアウターパ
ネル２２との間隔ｔは、空気層のままでもよいが、上記
と同様な吸音材としてのフェルトを充填してもよい。The distance t between the dash inner panel 13 and the dash outer panel 22 may be left as an air layer, or may be filled with felt as a sound absorbing material similar to the above.
上記ダッシュアッパーパネル２２は、重量がある剛性体
の伏板製であわ、ゴムマウント２３は弾性体であるから
、両者による共振系により、空気伝播音の遮音対策とす
ると同時に、この共振系をダイナミックダンパーとして
作用させて振動伝播音の遮音対策とする。The dash upper panel 22 is made of a heavy and rigid base plate, and the rubber mount 23 is an elastic body, so the resonance system created by both of them serves as a sound insulation measure against air-borne sound, and at the same time, this resonance system is dynamic. It acts as a damper to insulate vibration-propagated sound.
上記のような構成であれば、第５図（ａｌの振動伝播音
の騒音レベルを示すグラフから明らかなように、実：ｉ
ｌ ”で示す従来構造のものに比べて、点線すで示す本
案構造のものの理論値によれば、ダイナミックダンパー
としての作用により、低周波壊で圧倒的に高い背のピー
クレベルが低減されることがわかる。With the above configuration, as is clear from the graph showing the noise level of vibration-propagated sound in Figure 5 (al.
According to the theoretical value of the proposed structure shown by the dotted line, compared to the conventional structure shown by ``l'', the overwhelmingly high peak level of the height due to low frequency damage is reduced due to its action as a dynamic damper. I understand.
また、第５図ｆｂｌの空気伝播音の騒音レベルを示すグ
ラフから明らかなように、実線ａで示す従来構造のもの
に比べて１点ｖｓｂで示す本案構造のものの理論値によ
れば、共振系による減衰作用により、その共振周波数げ
０）のＶｉ倍以上の高周波域で遮音効果が大きいことが
わかる。Furthermore, as is clear from the graph showing the noise level of airborne sound in Fig. 5 fbl, the resonance system It can be seen that the sound insulation effect is large in the high frequency range that is more than Vi times the resonance frequency 0) due to the damping effect.
ただ、その共振周波数（ｆＯ）付近で多少レベル数
が高くなるが、どの周波域は、第４図（ａ’ 、 第４
図△
ｌｂｌに関連して説明したように振動伝播音が支配して
いるので、振動１云播音の低域化により空気伝播音の悪
化式をキャンセルして、さらにそれ以上の低減を図るこ
とができる。However, the number of levels increases somewhat near the resonance frequency (fO), but which frequency range is shown in Figure 4 (a', 4).
As explained in relation to Figure △ lbl, since vibration-borne sound is dominant, it is possible to cancel the deterioration equation of air-borne sound by lowering the frequency of the vibration-produced sound, and to further reduce it. can.
第５図（ｃｌは、振動伝播音＋空気伝播音の騒音レベル
、一つまり最終的な車体騒音を示すグラフで、実線ａで
示す従来構造のものに比べて、点線すで示す本案構造の
ものの理論値によれば、低周波域では約ＩＱｄＢ、高周
波域では約５ｄＢというように大幅に車内騒音が低減さ
れていることがわかる。Figure 5 (cl) is a graph showing the noise level of vibration-borne sound + air-borne sound, that is, the final car body noise. According to theoretical values, it can be seen that in-vehicle noise is significantly reduced by about IQdB in the low frequency range and about 5dB in the high frequency range.
以上の説明からも明らかなように、本発明は、ダッシュ
インナーパネルの前面にラバ一部材を介してダッシュア
ウターパネルを取付けたダッシュパネル構造であるから
、低周波域での振動伝播音が低減されて、二屯ダッシュ
枢造による高周波域での空気伝播音の低減と相まって車
内騒音が効果的に低減されるようになる。As is clear from the above description, the present invention has a dash panel structure in which a dash outer panel is attached to the front of a dash inner panel via a rubber member, so vibration propagation noise in the low frequency range is reduced. This, combined with the reduction of airborne sound in the high frequency range by the two-ton dash structure, effectively reduces interior noise.
【図面の簡単な説明】
第１図は従来のダッシュパネル構造の縦断面図、第２図
は本発明に係るダッシュ構造を採用した自動車の前部斜
視図、第３図は第２図のダッシュ構造の縦断面図、第４
図１ａｔは振動伝播音と空気伝播音の騒音レベルと周波
数域との関係を示すグラフ、第４図１ａｔは振動伝播音
と空気伝播音のエネルギー比率と周波数域との関係を示
すグラフ、第５図（ａｌは従来構造と本案構造の振動伝
播音の比較グラフ、第５図ｉｂｌは従来構造と本案構造
の窒気伝播音の比較グラフ、第５図（（＋は従来構造と
本案構造の車内騒音の比較グラフである。
１０・・・自１＋車、１１・・・エンジンｌシーム、１
２・・・車室、°１３・・−ダッシュインナーパネル％
１４・・・フロア％ １６・・・カウルボックス、２
１・・・フエＩレト、２２・・・ダッシュアウターパネ
ル、２３・・・ゴムマウント。
特 許 出 願 人 東洋工業株式会社代 理
人 弁理士 青白 葆外２名第１図
第２図
ｎ[Brief Description of the Drawings] Fig. 1 is a vertical sectional view of a conventional dash panel structure, Fig. 2 is a front perspective view of an automobile adopting the dash structure according to the present invention, and Fig. 3 is the dash of Fig. 2. Longitudinal cross-sectional view of the structure, No. 4
Figure 1at is a graph showing the relationship between the noise level and frequency range of vibration-borne sound and air-borne sound; Figure 4.1at is a graph showing the relationship between the energy ratio of vibration-borne sound and air-borne sound and the frequency range; Figure (al is a comparison graph of vibration-borne sound between the conventional structure and the proposed structure, Figure 5 ibl is a comparison graph of nitrogen-borne noise between the conventional structure and the proposed structure, It is a comparison graph of noise. 10... Own 1 + car, 11... Engine l seam, 1
2...Vehicle interior, °13...-Dash inner panel%
14...Floor% 16...Cowl box, 2
1... Hue Ireto, 22... Dash outer panel, 23... Rubber mount. Patent applicant: Toyo Kogyo Co., Ltd. Agent
People Patent Attorneys Aohaku, 2 people, Bōgai, Figure 1, Figure 2, n
Claims (1)
ネルであって、 該ダッシュパネルは、フロアから連続して立上がり上方
のカウルボックス部に接合されたダッシュインナーパネ
ルと、該ダッシュインナーパネルのエンジンルーム側に
配置されたダッシュアウタ、ａネルとからなり、該ダッ
シュアウターパネルは・ダッシュインナーパネルの前面
と所定の間隔をあけて配置されていて、ラバ一部材を介
してダッシュインナーパネルに取付けられていることを
特徴とする自動車のダッシュパネルの構造。(1) A dash panel that separates the engine room and the passenger compartment, and the dash panel includes a dash inner panel that rises continuously from the floor and is joined to the cowl box section above, and a dash inner panel that is connected to the engine room side of the dash inner panel. The dash outer panel is arranged at a predetermined distance from the front of the dash inner panel, and is attached to the dash inner panel via a rubber member. A structure of an automobile dash panel characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22325082A JPS59114167A (en) | 1982-12-20 | 1982-12-20 | Structure of dash panel of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22325082A JPS59114167A (en) | 1982-12-20 | 1982-12-20 | Structure of dash panel of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59114167A true JPS59114167A (en) | 1984-07-02 |
Family
ID=16795147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22325082A Pending JPS59114167A (en) | 1982-12-20 | 1982-12-20 | Structure of dash panel of automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59114167A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040025965A (en) * | 2002-09-17 | 2004-03-27 | 현대자동차주식회사 | An insulator mounted in engine room of automobile |
| WO2013005685A1 (en) * | 2011-07-04 | 2013-01-10 | 本田技研工業株式会社 | Structure for front portion of vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4714836U (en) * | 1971-03-16 | 1972-10-21 |
-
1982
- 1982-12-20 JP JP22325082A patent/JPS59114167A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4714836U (en) * | 1971-03-16 | 1972-10-21 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040025965A (en) * | 2002-09-17 | 2004-03-27 | 현대자동차주식회사 | An insulator mounted in engine room of automobile |
| WO2013005685A1 (en) * | 2011-07-04 | 2013-01-10 | 本田技研工業株式会社 | Structure for front portion of vehicle |
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