JP4716607B2 - Liquid seal vibration isolator - Google Patents

Liquid seal vibration isolator Download PDF

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Publication number
JP4716607B2
JP4716607B2 JP2001190528A JP2001190528A JP4716607B2 JP 4716607 B2 JP4716607 B2 JP 4716607B2 JP 2001190528 A JP2001190528 A JP 2001190528A JP 2001190528 A JP2001190528 A JP 2001190528A JP 4716607 B2 JP4716607 B2 JP 4716607B2
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Japan
Prior art keywords
liquid chamber
orifice passage
internal pressure
membrane
engine
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JP2001190528A
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Japanese (ja)
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JP2003004090A (en
Inventor
和俊 佐鳥
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Yamashita Rubber Co Ltd
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Yamashita Rubber Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、自動車用エンジンマウント等に使用される液封防振装置に関する。
【0002】
【従来の技術】
このような液封エンジンマウントとして、主液室と副液室間にアイドルオリフィス通路を設け、副液室を構成するダイヤフラムの一部を着座部として、ここでアイドルオリフィス通路を開閉するとともに、通常時は押圧部材の押当てにより着座部でアイドルオリフィス通路の開口を閉じさせ、アイドル時に押圧部材が着座部を開放するとにより、着座部がアイドルオリフィス通路の開口を開放してアイドルオリフィス通路を開くように構成したものが公知である(一例として特開平10−281214号参照)。
【0003】
【発明が解決しようとする課題】
ところで、上記のようにオリフィス通路の開閉手段を有する場合、この開閉手段によって異音を発生することがある。例えば、上記アイドルオリフィス通路の場合には、閉じている状態でエンジンの始動又は停止時における大きな振動が入力されると、弾性本体部が大きく弾性変形して主液室内を正圧又は負圧することにより、急激な内圧変動が生じて液中に多数の気泡となってエアが発生するキャビテーション現象を生じることがある。この現象が生じるとオリフィス通路を閉じている開閉手段が副液室側へ押し離されたり、逆に主液室側へ強く吸着されることになり、これを反復することにより前記異音が生じる。そこで本願発明は、このようなエンジンの始動又は停止時における主液室の内圧変動に基づく開閉手段による異音発生の抑制を目的とする。
【0004】
【課題を解決するための手段】
上記課題を解決するため本願の液封防振装置に係る発明は、仕切部材に区画された主液室と副液室をダンピングオリフィス通路とアイドルオリフィス通路で連絡し、アイドルオリフィス通路を開閉部材で開閉自在とした液封防振装置において、弾性本体部の主液室に臨む側壁部に弾性変形自在の横膜を設け、この横膜をアクチュエータで内外へ変形させ、かつ、この横膜の変形をエンジン振動波形とリンクして制御し、主液室の内圧変化を制御するとともに、
エンジンの停止又は始動時において、前記アクチュエータを作動させて、閉じた状態にある開閉部材の動きを低減又はキャンセル方向に横膜を変形させることを特徴とする。
【0005】
このとき、前記アクチュエータを、エンジン振動により弾性本体部が変形するとき、横膜を主液室の内圧変化が高くなるように作動させることもできる。
【0006】
さらに、アイドル時に横膜を上記したと同様に開閉部材の動きを低減又はキャンセル方向に作動させることもできる。また、アイドル状態から発進状態へ移行後の一般走行時に、アクチュエータが横膜を主液室の内圧変化に応じて自由に弾性変形させるようにもできる。
【0007】
【発明の効果】
横膜の動きをエンジンの振動波形とリンクさせたので、主液室の内圧変化が正圧となる方向の振動(以下、+振動)のとき、横膜を外方へ変形させ、逆に負圧となる方向の振動(以下、−振動)のとき、内方へ変形させることにより、主液室の急激な内圧変化を阻止し、仕切部材と開閉部材の干渉による異音の発生を抑制する。
【0008】
アクチュエータをエンジンの始動、停止時に作動させて横膜を制御することにより、エンジンの始動、停止時における主液室の急激な内圧変化を阻止して異音の発生を抑制する。
【0009】
エンジン振動により弾性本体部が変形したとき、横膜を変形させて主液室の内圧を高めると、ダンピングオリフィス通路へ流れる液量を多くしてダンピングオリフィス通路における液柱共振により、減衰効果を大きくして乗り心地を改善する。
【0010】
アイドル時に上記同様に制御すると、アイドルオリフィス通路への液量を大きくして、アイドルオリフィス通路の液柱共振による動バネの極小値を小さくして低動バネ化する。
【0011】
一般走行時にアクチュエータが横膜を主液室の内圧変化に応じて横膜を自由に弾性変形させると、主液室の内圧変化に応じて横膜が自由に弾性変形してこれを吸収するため、低動バネを実現する。
【0012】
【発明の実施の形態】
以下、図面に基づいて一実施例を説明する。図1は本実施例に係る液封エンジンマウントの全断面図、図2は構成部材の分解図、図3は横膜部の拡大図、図4はその制御方法を示すグラフである。
【0013】
まず、図1及び図2において、このエンジンマウントは、第1の取付部材1、第2の取付部材2及び弾性本体部3を有し、第1の取付部材1はネジにより振動源であるエンジンへ取付けられ、第2の取付部材2はフランジ4にて車体へ取付けられる。
【0014】
フランジ4は開閉手段室5を囲む金属製の作動室筒部6へ接続し、その上端部は主液室筒部7とカシメにより結合されている。主液室筒部7は弾性本体部3の裾部と一体化され、その内面には弾性本体部3と連続一体に形成されるライニング部8が形成される。
【0015】
主液室筒部7の側面には一部が円形の穴9とされ、この穴9部分のライニング部8は穴9を通して外方へ弾性変形自在の横膜部10をなす。横膜部10は主液室13の内圧変動を吸収するためのものであり、横膜部10の弾性変形は必要によりソレノイドなどの操作手段により制御してもよい。
【0016】
第1の取付部材1、第2の取付部材2及び弾性本体部3で囲まれた空間には液室が形成され、その内部は仕切り部材12により弾性本体部3側の主液室13と開閉手段室5側の副液室14に区画される。副液室14は開閉手段室5内のダイヤフラム15と仕切り部材12との間に形成される。
【0017】
主液室13には非圧縮性の液体が封入され、副液室14と常時連通するダンピングオリフィス通路16及び開閉自在のアイドルオリフィス通路17とで連絡される。アイドルオリフィス通路17の副液室14側開口18はダイヤフラム15の中央部に形成された、厚肉の着座部20で開閉され、この着座部20は押圧部材21により仕切り部材12への密着又は開口18の開放を制御される。
【0018】
図2に明らかなように、仕切り部材12は、主液室13内へ大きく突出する樹脂製の円形テーブル状をなす上部22、ゴム等の弾性部材からなる中間部23及びアルミダイカストよりなる金属製の下部24を組み合わせたものである。
【0019】
上部22の外周部はフランジ25が形成され、その一部はダンピングオリフィス通路16を形成する凹部26とされ、最外周部は固定部27となる。また、中央部には、下向きに開放された略渦巻き上の通路28が形成され、その一端は開口18へ連通し、他端は主液室13内へ連通している。
【0020】
中間部23は外周側へ次第に肉厚となるテーパー部30、その外周側に形成される凹溝31を備え、最外周部は凹溝31の外壁をなす立壁32となっている。凹溝31は凹部26と対面して組み合わされ、内側にダンピングオリフィス通路16の上段部分を形成する。立壁32の上端は径方向外方へ突出するクッションフランジ33になっている。
【0021】
このダンピングオリフィス通路16は上部22と中間部23の間及び中間部23と下部24の間に螺旋状に形成され、その一端は主液室13内へ連通し、他端は副液室14と連通する。この特性は、一般走行時における低周波数の振動に対して液柱共振するように設定されている。
【0022】
また、上部22と中間部23の接触部のうち、ダンピングオリフィス通路16に臨んでその内側部分はテーパー接合部29(図1)となっている。さらに、固定部27は立壁32のクッションフランジ33の上に重なる。
【0023】
下部24は、中央に開口18が形成され、かつ凹溝31の下方に凹溝34が形成され、凹溝34と中間部23との間にダンピングオリフィス通路16の下段部分が形成されている。中間部23の最外周部は立壁35をなして立壁32の外側へ重なり、上端をクッションフランジ33の下面へ当接させている。
【0024】
ゴム等の適宜可焼性材料よりなるダイヤフラム15は外周部は略クランク状断面をなす取付リング36と一体化され、その内面に沿って上方へ延びる弾性周壁37を形成し、立壁35の外側に沿って上方へ延び、固定部27の外周端が当接している 取付リング36の上端38は作動室筒部6と主液室筒部7の間に挟まれて一体にカシメ固定されている。
【0025】
これにより、仕切部材12は主液室筒部7のカシメフランジ7a(図2)及び取付リング36の下端に形成された内向きフランジ39(図2)の間に挟持固定され、かつクッションフランジ33及び弾性周壁37によりフローテイング支持される。
【0026】
押圧部材21は中央が円柱状に上方へ突出し、周囲が左右へ広がる形状をなし、全体が非通気性の可膜40で覆われ、その中央部にゴム等の弾性体からなる肉厚の押当部41が一体に形成されている。
【0027】
この押当部41に一端を一体化された金属プレート42が可膜40の内側に沿って設けられ、その外周部の他端は可膜40の外周部である肉厚端部43と一体化されている。
【0028】
肉厚端部43の周囲は、固定リング44により樹脂製のボトムプレート45の外周部及び全周でカシメ一体化されている。これにより可膜40とボトムプレート45の間に密閉空間を形成して負圧室46をなすとともに、ボトムプレート45の中央部には負圧室46と図示しないエンジンの吸気通路とを連通するためのジョイントパイプ47が形成されている。
【0029】
また、ジョイントパイプ47の周囲と押当部41の間にはコイルスプリング48が設けられ、負圧室46が大気開放されたときは押当部41を押し上げて着座部20を下部24の開口18周囲へ押し当て密着し、負圧を接続すると、コイルスプリング48に抗して押当部41を押し下げ、着座部20が開口18を開放するようになっている。
【0030】
図6は押圧部材21を図2の上方から示す平面視図であり、この図に明らかなように、押圧部材21の着座部20と接触する上面の中央には円形凹部49が設けられている。この円形凹部49は外周部へ達して開放されている十字状溝49aに連通している。
【0031】
図3に示すように、ソレノイド等からなるアクチュエータ11は、伸縮自在のロッド50を延出し、その先端の拡大頭部51を横膜10へ埋設一体化してある。また、アクチュエータ11は、制御部52により駆動制御される。
【0032】
制御部52はイグニッションスイッチのオン・オフ、エンジンの回転数、エンジン振動等を検知してアクチュエータ11を駆動し、横膜10を仮想線で示すように内外へ変形させる。横膜10が内方へ突出変形すると主液室13の内圧が上昇し、逆に外方へ変形すると主液室13の内圧が低下する。この制御について図4に示す。
【0033】
図4は上段にエンジン波形を示し、下段に横膜10の変形を示す。いずれも縦軸が変位量であり+,−は、それぞれ+振動,−振動に対応している。横軸は時間であり、エンジン振動が減衰する所定時間Tのみ横膜10をエンジン波形にリンクさせて制御する。
【0034】
すなわち、エンジン振動が+振動から始まると、横膜10は−方向へ変位し、続いてエンジンが大振幅Aなる−振動をすると、横膜10はこの変化量に対応した大きな変位量Bなる+方向の変位を行う。以後、制御時間T内にて、このようにエンジンの振動方向と逆向きで、かつその振幅と対応する変位量となるように制御する。
【0035】
この制御は主液室13内の容積を一定にするように行い、制御の基礎となる信号は、エンジン振動を検知する加速度計検出信号に基づき、その振動検出量に基づいて方向及び振幅を検知できる。
【0036】
このように。横膜10の動きをエンジンの振動波形とリンクさせたので、主液室13の内圧変化が正圧となる方向の振動(以下、+振動)のとき、横膜10を外方へ変形させ、逆に負圧となる方向の振動(以下、−振動)のとき、内方へ変形させることにより、主液室13の急激な内圧変化を阻止し、仕切部材12と開閉部材である着座部20の干渉による異音の発生を抑制できる。
【0037】
また、アクチュエータ11をエンジンの始動、停止時に作動させて横膜10を制御することにより、エンジンの始動、停止時における主液室13の急激な内圧変化を阻止して異音の発生を抑制できる。
【0038】
さらに、エンジン振動により弾性本体部材3が変形したとき、横膜10を変形させて主液室13の内圧を高めると、ダンピングオリフィス通路16へ流れる液量を多くしてダンピングオリフィス通路16における液柱共振により、減衰効果を大きくして乗り心地を改善する。
【0039】
そのうえ、アイドル時に上記同様に制御すると、アイドルオリフィス通路17への液量を大きくして、アイドルオリフィス通路17の液柱共振による動バネの極小値を小さくして低動バネ化させることができ。
【0040】
さらに、一般走行時にアクチュエータ11が横膜10をフリーにすると、主液室13の内圧変化に応じて横膜10が自由に弾性変形してこれを吸収するため、低動バネを実現できる。
【図面の簡単な説明】
【図1】実施例に係るエンジンマウントの全断面図
【図2】その一部拡大図
【図3】横膜部分の拡大図
【図4】制御方法を示すグラフ
【符号の説明】
3:弾性本体部材、10:横膜、11:アクチュエータ、12:仕切部材、13:主液室、14:副液室、15:ダイヤフラム、16:ダンピングオリフィス通路、17:アイドルオリフィス通路、20:着座部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid seal vibration isolator for use in an automobile engine mount or the like.
[0002]
[Prior art]
As such a liquid seal engine mount, an idle orifice passage is provided between the main liquid chamber and the sub liquid chamber, and a part of the diaphragm constituting the sub liquid chamber is used as a seating portion. time to close the opening of the idle orifice passage seat by the pushing of the pressing member, by the this pressing member during idling opens the seat, the idle orifice passage seat is to open the opening of the idle orifice passage A structure that is configured to open is known (see JP-A-10-281214 as an example).
[0003]
[Problems to be solved by the invention]
When the orifice passage opening / closing means is provided as described above, noise may be generated by the opening / closing means. For example, in the case of the idle orifice passage described above, if a large vibration is input when the engine is started or stopped in a closed state, the elastic main body is greatly elastically deformed to positively or negatively pressure the main liquid chamber. As a result, sudden internal pressure fluctuations may occur, resulting in a cavitation phenomenon in which air is generated as a large number of bubbles in the liquid. When this phenomenon occurs, the opening / closing means that closes the orifice passage is pushed away to the side of the secondary liquid chamber, or conversely, is strongly adsorbed to the side of the main liquid chamber. . SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to suppress the generation of abnormal noise by an opening / closing means based on fluctuations in the internal pressure of the main fluid chamber when the engine is started or stopped.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the invention relating to the liquid seal vibration isolator of the present application connects the main liquid chamber and the sub liquid chamber partitioned by the partition member by the damping orifice passage and the idle orifice passage , and the idle orifice passage by the opening / closing member. In the liquid seal vibration isolator which can be opened and closed, an elastically deformable lateral membrane is provided on the side wall facing the main liquid chamber of the elastic main body, the lateral membrane is deformed inward and outward by an actuator , and the lateral membrane is deformed. Is linked to the engine vibration waveform to control changes in the internal pressure of the main fluid chamber ,
When the engine is stopped or started, the actuator is operated to reduce the movement of the open / close member in the closed state or to deform the lateral membrane in the canceling direction.
[0005]
At this time, the actuator, when the elastic body section deforms by engine vibration can also be operated as a horizontal membrane pressure change in the main fluid chamber increases.
[0006]
Furthermore, the Yokomaku during idling can also be operated to reduce or cancel Direction movement likewise closing member and above. Further, from the idle state during normal driving after the transition to the starting state, the actuator can also so that is freely elastically deformed according to the transverse film changes in internal pressure in the main liquid chamber.
[0007]
【The invention's effect】
Since the movement of the diaphragm is linked to the vibration waveform of the engine, when the change in the internal pressure of the main fluid chamber is a positive vibration (hereinafter referred to as + vibration), the diaphragm is deformed outwards and negatively reversed. In the direction of pressure (hereinafter referred to as -vibration), by deforming inward, a sudden change in the internal pressure of the main liquid chamber is prevented, and the generation of noise due to interference between the partition member and the opening / closing member is suppressed. .
[0008]
By controlling the lateral membrane by operating the actuator at the start and stop of the engine, a sudden change in internal pressure of the main liquid chamber at the start and stop of the engine is prevented, thereby suppressing the generation of abnormal noise.
[0009]
When deformed elastic body section by the engine vibration, increasing the internal pressure in the main liquid chamber by deforming the lateral film, the liquid column resonance in the damping orifice passage by increasing the amount of liquid flowing into the damping orifice passage, the damping effect increases To improve riding comfort.
[0010]
When the same control is performed during idling, the amount of liquid flowing into the idle orifice passage is increased, and the minimum value of the dynamic spring due to liquid column resonance in the idle orifice passage is reduced to reduce the dynamic spring.
[0011]
When the actuator during normal driving is Ru is freely elastically deformable lateral membrane according transverse film changes in internal pressure in the main liquid chamber, the lateral film absorbs this freely elastically deformed according to the change in the internal pressure in the main liquid chamber Therefore, a low dynamic spring is realized.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment will be described below with reference to the drawings. FIG. 1 is a full sectional view of a liquid ring engine mount according to the present embodiment, FIG. 2 is an exploded view of components, FIG. 3 is an enlarged view of a lateral membrane portion, and FIG. 4 is a graph showing the control method.
[0013]
1 and 2, the engine mount includes a first mounting member 1, a second mounting member 2, and an elastic main body 3. The first mounting member 1 is an engine that is a vibration source by screws. The second attachment member 2 is attached to the vehicle body by a flange 4.
[0014]
The flange 4 is connected to a metal working chamber cylinder 6 surrounding the opening / closing means chamber 5, and its upper end is coupled to the main liquid chamber cylinder 7 by caulking. The main liquid chamber tube portion 7 is integrated with the bottom portion of the elastic main body portion 3, and the lining portion 8 formed integrally with the elastic main body portion 3 is formed on the inner surface thereof.
[0015]
A part of the side surface of the main liquid chamber tube portion 7 is a circular hole 9, and the lining portion 8 of the hole 9 portion forms a lateral membrane portion 10 that can be elastically deformed outwardly through the hole 9. The transverse membrane part 10 is for absorbing fluctuations in the internal pressure of the main liquid chamber 13, and the elastic deformation of the transverse membrane part 10 may be controlled by an operating means such as a solenoid if necessary.
[0016]
A liquid chamber is formed in a space surrounded by the first mounting member 1, the second mounting member 2, and the elastic main body 3, and the interior thereof is opened and closed with the main liquid chamber 13 on the elastic main body 3 side by a partition member 12. It is divided into a secondary liquid chamber 14 on the means chamber 5 side. The auxiliary liquid chamber 14 is formed between the diaphragm 15 in the opening / closing means chamber 5 and the partition member 12.
[0017]
The main liquid chamber 13 is filled with an incompressible liquid, and is communicated with a damping orifice passage 16 and a freely openable / closable idle orifice passage 17 which are always in communication with the sub liquid chamber 14. The opening 18 on the secondary liquid chamber 14 side of the idle orifice passage 17 is opened and closed by a thick seat 20 formed at the center of the diaphragm 15. The seat 20 is in close contact with or opened to the partition member 12 by the pressing member 21. The opening of 18 is controlled.
[0018]
As is apparent from FIG. 2, the partition member 12 includes a resin-made circular table-like upper portion 22 that protrudes greatly into the main liquid chamber 13, an intermediate portion 23 made of an elastic member such as rubber, and a metal made of aluminum die casting. The lower part 24 is combined.
[0019]
A flange 25 is formed on the outer peripheral portion of the upper portion 22, a part of which is a concave portion 26 that forms the damping orifice passage 16, and an outermost peripheral portion is a fixed portion 27. In addition, a substantially spiral passage 28 opened downward is formed in the central portion, one end of which communicates with the opening 18 and the other end communicates with the main liquid chamber 13.
[0020]
The intermediate portion 23 includes a tapered portion 30 that gradually increases in thickness toward the outer peripheral side, and a concave groove 31 formed on the outer peripheral side, and the outermost peripheral portion is a standing wall 32 that forms the outer wall of the concave groove 31. The concave groove 31 is combined so as to face the concave portion 26, and forms an upper stage portion of the damping orifice passage 16 inside. The upper end of the standing wall 32 is a cushion flange 33 that protrudes radially outward.
[0021]
The damping orifice passage 16 is formed in a spiral shape between the upper part 22 and the intermediate part 23 and between the intermediate part 23 and the lower part 24, one end communicating with the main liquid chamber 13 and the other end with the sub liquid chamber 14. Communicate. This characteristic is set so that the liquid column resonates with respect to low-frequency vibration during general traveling.
[0022]
Of the contact portion between the upper portion 22 and the intermediate portion 23, the inner portion thereof faces the damping orifice passage 16 and forms a tapered joint portion 29 (FIG. 1). Further, the fixing portion 27 overlaps the cushion flange 33 of the standing wall 32.
[0023]
The lower portion 24 has an opening 18 at the center, a recessed groove 34 is formed below the recessed groove 31, and a lower portion of the damping orifice passage 16 is formed between the recessed groove 34 and the intermediate portion 23. The outermost peripheral portion of the intermediate portion 23 forms a standing wall 35 and overlaps the outside of the standing wall 32, and the upper end is in contact with the lower surface of the cushion flange 33.
[0024]
Diaphragm 15 made of an appropriate flammable material such as rubber is integrated with a mounting ring 36 whose outer peripheral portion has a substantially crank-shaped cross section, and forms an elastic peripheral wall 37 extending upward along the inner surface thereof. The upper end 38 of the mounting ring 36 is sandwiched between the working chamber cylinder portion 6 and the main liquid chamber cylinder portion 7 and is integrally fixed by caulking.
[0025]
Thus, the partition member 12 is sandwiched and fixed between the caulking flange 7a (FIG. 2) of the main liquid chamber tube portion 7 and the inward flange 39 (FIG. 2) formed at the lower end of the mounting ring 36, and the cushion flange 33 And is supported by the elastic peripheral wall 37 for floating.
[0026]
The pressing member 21 without projecting center upward in a cylindrical shape, a shape surrounding spreads to the left and right, the whole is covered with an air-impermeable flexible membrane 40, the wall thickness made of an elastic material such as rubber at the center thereof The pressing part 41 is integrally formed.
[0027]
The abutting parts 41 metal plate 42 that is integrated with one end is provided along the inner side of the flexible membrane 40, the other end of the outer peripheral portion and the thickened portion 43 which is the outer peripheral portion of the flexible membrane 40 It is integrated.
[0028]
The periphery of the thick end portion 43 is integrally crimped by the fixing ring 44 on the outer peripheral portion and the entire periphery of the resin bottom plate 45. Together form a vacuum chamber 46 to form a closed space between Thereby flexible film 40 and the bottom plate 45, for communicating the intake path of an engine (not shown) in the central portion of the bottom plate 45 and the negative pressure chamber 46 A joint pipe 47 is formed.
[0029]
A coil spring 48 is provided between the periphery of the joint pipe 47 and the pressing portion 41, and when the negative pressure chamber 46 is opened to the atmosphere, the pressing portion 41 is pushed up so that the seating portion 20 is opened to the opening 18 in the lower portion 24. When pressed against the periphery and connected with a negative pressure, the pressing portion 41 is pushed down against the coil spring 48 and the seating portion 20 opens the opening 18.
[0030]
FIG. 6 is a plan view showing the pressing member 21 from above in FIG. 2. As is clear from this figure, a circular recess 49 is provided in the center of the upper surface of the pressing member 21 that contacts the seating portion 20. . The circular recess 49 communicates with a cross-shaped groove 49a that reaches the outer periphery and is open.
[0031]
As shown in FIG. 3, the actuator 11 made of a solenoid or the like extends a telescopic rod 50, and an enlarged head 51 at the tip thereof is embedded and integrated in the lateral membrane 10. The actuator 11 is driven and controlled by the control unit 52.
[0032]
The control unit 52 detects the on / off of the ignition switch, the engine speed, the engine vibration, and the like to drive the actuator 11 to deform the lateral membrane 10 inward and outward as indicated by a virtual line. When the lateral membrane 10 is deformed to project inward, the internal pressure of the main liquid chamber 13 increases, and conversely, when the lateral membrane 10 is deformed outward, the internal pressure of the main liquid chamber 13 decreases. This control is shown in FIG.
[0033]
FIG. 4 shows the engine waveform in the upper stage and the deformation of the transverse membrane 10 in the lower stage. In each case, the vertical axis represents the displacement amount, and + and − correspond to + vibration and −vibration, respectively. The horizontal axis represents time, and control is performed by linking the lateral membrane 10 to the engine waveform only for a predetermined time T when the engine vibration is attenuated.
[0034]
That is, when the engine vibration starts from + vibration, the lateral membrane 10 is displaced in the-direction, and when the engine subsequently vibrates with a large amplitude A, the lateral membrane 10 becomes a large displacement amount B corresponding to the amount of change + Displace the direction. Thereafter, control is performed within the control time T such that the displacement is in the opposite direction to the vibration direction of the engine and corresponding to the amplitude.
[0035]
This control is performed so that the volume in the main liquid chamber 13 is constant, and the signal that is the basis of the control is based on the accelerometer detection signal that detects engine vibration, and the direction and amplitude are detected based on the vibration detection amount. it can.
[0036]
in this way. Since the movement of the lateral membrane 10 is linked to the vibration waveform of the engine, when the internal pressure change of the main liquid chamber 13 is a vibration in the direction of positive pressure (hereinafter referred to as + vibration), the lateral membrane 10 is deformed outward, Conversely, when the vibration is in the direction of negative pressure (hereinafter, referred to as “−vibration”), it is deformed inward to prevent a sudden change in the internal pressure of the main liquid chamber 13, and the partition member 12 and the seating portion 20 that is an opening / closing member. Generation of abnormal noise due to interference can be suppressed.
[0037]
Further, by controlling the lateral membrane 10 by operating the actuator 11 when the engine is started and stopped, it is possible to prevent a sudden change in internal pressure of the main liquid chamber 13 during the start and stop of the engine, thereby suppressing the generation of abnormal noise. .
[0038]
Additionally, when deformed elastic body member 3 by the engine vibration and to deform the lateral film 10 increase the internal pressure of the main liquid chamber 13, in the damping orifice passage 16 by increasing the amount of liquid flowing into the damping cage Fi scan path 16 The liquid column resonance improves the riding comfort by increasing the damping effect.
[0039]
In addition, when the same control as described above is performed during idling, the amount of liquid flowing into the idle orifice passage 17 can be increased, and the minimum value of the dynamic spring due to the liquid column resonance in the idle orifice passage 17 can be reduced to reduce the dynamic spring.
[0040]
Further, when the actuator 11 frees the transverse membrane 10 during general traveling, the transverse membrane 10 freely elastically deforms and absorbs it in accordance with the change in the internal pressure of the main liquid chamber 13, so that a low dynamic spring can be realized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an engine mount according to an embodiment. FIG. 2 is a partially enlarged view of the engine mount. FIG. 3 is an enlarged view of a lateral membrane portion.
3: Elastic body member, 10: Transmembrane, 11: Actuator, 12: Partition member, 13: Main liquid chamber, 14: Sub liquid chamber, 15: Diaphragm, 16: Damping orifice passage , 17: Idle orifice passage , 20: Seating part

Claims (4)

仕切部材に区画された主液室と副液室をダンピングオリフィス通路とアイドルオリフィス通路で連絡し、アイドルオリフィス通路を開閉部材で開閉自在とした液封防振装置において、弾性本体部の主液室に臨む側壁部に弾性変形自在の横膜を設け、この横膜をアクチュエータで内外へ変形させ、かつ、この横膜の変形をエンジン振動波形とリンクして制御し、主液室の内圧変化を制御するとともに、
エンジンの停止又は始動時において、前記アクチュエータを作動させて、閉じた状態にある開閉部材の動きを低減又はキャンセル方向に横膜を変形させることを特徴とする液封防振装置。
A main liquid chamber of an elastic main body part in a liquid seal vibration isolator in which a main liquid chamber and a sub liquid chamber partitioned by a partition member are connected by a damping orifice passage and an idle orifice passage , and the idle orifice passage can be opened and closed by an opening / closing member. An elastically deformable lateral membrane is provided on the side wall facing the surface, and this lateral membrane is deformed inward and outward by an actuator , and the deformation of the lateral membrane is controlled by linking with the engine vibration waveform to change the internal pressure of the main fluid chamber. as well as control,
A liquid-sealed vibration isolating device characterized in that when the engine is stopped or started, the actuator is operated to reduce the movement of the open / close member in a closed state or to deform the lateral membrane in a canceling direction.
ダンピングオリフィス通路の共振時において、エンジン振動により弾性本体部が変形するとき、横膜を主液室の内圧変化が高くなるように作動させることを特徴とする請求項1の液封防振装置。 2. The liquid ring vibration isolator according to claim 1, wherein when the elastic main body portion is deformed by engine vibration at the time of resonance of the damping orifice passage , the transverse membrane is operated so that a change in internal pressure of the main liquid chamber is increased. アイドル時に横膜を主液室の内圧変化が高くなるように作動させることを特徴とする請求項1の液封防振装置。2. The liquid ring vibration isolator according to claim 1 , wherein the diaphragm is actuated so that a change in internal pressure of the main liquid chamber is increased during idling. アイドル状態から発進状態へ移行後の一般走行時は、主液室の内圧変化に応じて横膜を自由に弾性変形させることを特徴とする請求項1の液封防振装置。2. The liquid seal vibration isolator according to claim 1, wherein the transverse membrane is freely elastically deformed in accordance with a change in the internal pressure of the main liquid chamber during general running after transition from the idle state to the start state.
JP2001190528A 2001-06-22 2001-06-22 Liquid seal vibration isolator Expired - Fee Related JP4716607B2 (en)

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JP4830928B2 (en) * 2007-03-15 2011-12-07 トヨタ自動車株式会社 Active vibration isolator
JP5118904B2 (en) * 2007-07-04 2013-01-16 東海ゴム工業株式会社 Pneumatic actuator for vibration isolator and fluid filled vibration isolator using the same

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