JP2008230501A - Electronic control air brake device - Google Patents

Electronic control air brake device Download PDF

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JP2008230501A
JP2008230501A JP2007075227A JP2007075227A JP2008230501A JP 2008230501 A JP2008230501 A JP 2008230501A JP 2007075227 A JP2007075227 A JP 2007075227A JP 2007075227 A JP2007075227 A JP 2007075227A JP 2008230501 A JP2008230501 A JP 2008230501A
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air
brake
reservoir tank
air reservoir
axle modulator
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JP5064071B2 (en
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Yuta Sakamoto
勇太 坂元
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UD Trucks Corp
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UD Trucks Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic control air brake device attaining reduction and sound-attenuation of noise generated at brake operation in the electronic control air brake device. <P>SOLUTION: The electronic control air brake device is provided with an axle modulator attached to an air pipe between an air reservoir tank and a brake chamber for a rear wheel; and a control unit for detecting stepping-in timing and a stepping-in amount of a pedal by an electric signal from a brake valve and feeding a control signal to the axle modulator. The axle modulator feeds an air pressure determined as necessity from the control signal from the control unit from the air reservoir tank to the brake chamber to operate the brake. Onto the air pipe between the air reservoir tank and the axle modulator, an air reservoir tank having a smaller capacity than the air reservoir tank is separately attached. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、中大型のトラックやバス，トラクタ等の車両に搭載される電子制御エアブレーキ装置に関する。   The present invention relates to an electronically controlled air brake device mounted on vehicles such as medium and large trucks, buses, and tractors.

従来、中大型のトラックやバス，トラクタ等の車両では、圧縮空気を作動媒体とする空気圧応動アクチュエータにより、ブレーキシュー等の摩擦部材を車輪に固着したブレーキドラム等に圧接させて制動力を発生させるエアブレーキ装置が広く採用されている。
そして、昨今では、非特許文献１に開示されるようにエアブレーキ装置に電気信号系を追加して、ブレーキレスポンスとブレーキフィーリングを向上させた電子制御エアブレーキ装置（ＥＢＳエアブレーキ装置）が採用されている。 Conventionally, in vehicles such as medium- and large-sized trucks, buses, and tractors, a braking force is generated by pressing a friction member such as a brake shoe against a brake drum fixed to a wheel by a pneumatic actuator that uses compressed air as a working medium. Air brake devices are widely used.
And recently, as disclosed in Non-Patent Document 1, an electronically controlled air brake device (EBS air brake device) that improves the brake response and brake feeling by adding an electric signal system to the air brake device is adopted. Has been.

尚、ＥＢＳとは、エレクトロニック ブレーキ システム（Ｅｌｅｃｔｒｏｎｉｃ Ｂｒａｋｅ Ｓｙｓｔｅｍ）の略称である。
図２は電子制御エアブレーキ装置１の概略構成図を示し、コントロールユニット３は、ブレーキバルブ５からの電気信号によりペダル７の踏み込みタイミングと踏み込み量（角度）を検出し、踏み込み量に応じた減速度が得られるように、前輪側のプロポーショナルリレーバルブと後輪側のアクスルモジュレータ９に制御信号を送るようになっている。 Note that EBS is an abbreviation for Electronic Brake System (Electronic Brake System).
FIG. 2 shows a schematic configuration diagram of the electronically controlled air brake device 1. The control unit 3 detects the depression timing and the depression amount (angle) of the pedal 7 based on an electric signal from the brake valve 5, and reduces the depression according to the depression amount. In order to obtain the speed, control signals are sent to the proportional relay valve on the front wheel side and the axle modulator 9 on the rear wheel side.

そして、プロポーショナルリレーバルブは、コントロールユニット３からの電気信号から必要と判断される空気圧を、エアリザーバタンク１１から左右の前輪用のブレーキチャンバへ送ってブレーキを作動させる。
一方、アクスルモジュレータ９は、コントロールユニット３からの制御信号から必要と判断される空気圧を、エアリザーバタンク１１から左右の後輪（後前輪と後後輪）用のブレーキチャンバ１３，１５へ送って、ブレーキを作動させる構造となっている。 Then, the proportional relay valve operates the brake by sending air pressure determined to be necessary from the electrical signal from the control unit 3 from the air reservoir tank 11 to the left and right front wheel brake chambers.
On the other hand, the axle modulator 9 sends the air pressure determined to be necessary from the control signal from the control unit 3 from the air reservoir tank 11 to the brake chambers 13 and 15 for the left and right rear wheels (rear front wheels and rear rear wheels). The brake is actuated.

ところで、従来、この種の電子制御エアブレーキ装置１は構造上、前輪側の空気配管に比し後輪（後前輪と後後輪）側の空気配管１７が長く、圧縮空気がブレーキチャンバ１３，１５に到達する迄に時間を要して後輪側ブレーキの作動遅れが発生してしまう虞がある。
そこで、従来、この種の電子制御エアブレーキ装置１では、後輪側ブレーキの作動遅れを防止するため、ドライバーがペダル７を踏み込むと、その初期の僅かな踏み込み操作の段階で、コントロールユニット３はブレーキが作動しない程度に瞬間的に高圧の圧縮空気をエアリザーバタンク１１から後輪側の空気配管１７へ供給して、空気配管１７内を圧力で満たす制御を行っている。
整備要領書 ２００５大型車（Ｇ１０５Ｒ）VIII ＢＲＣ−６、１５、１６ ＢＲ−１３３ 編集・発行 日産ディーゼル工業株式会社 Conventionally, this type of electronically controlled air brake device 1 has a structure in which the air pipe 17 on the rear wheel (rear front wheel and rear rear wheel) side is longer than the air pipe on the front wheel side, and the compressed air is supplied to the brake chamber 13, There is a possibility that a delay in the operation of the rear-wheel brake occurs due to the time required to reach 15.
Therefore, conventionally, in this type of electronically controlled air brake device 1, when the driver depresses the pedal 7 in order to prevent the operation delay of the rear wheel side brake, the control unit 3 is operated at the initial slight depressing operation stage. Control is performed to supply high pressure compressed air from the air reservoir tank 11 to the air piping 17 on the rear wheel side so that the brake does not operate, and to fill the air piping 17 with pressure.
Maintenance Manual 2005 Large Car (G105R) VIII BRC-6, 15, 16 BR-133 Edit / Publish Nissan Diesel Industry Co., Ltd.

しかし乍ら、斯様に瞬間的に高圧の圧縮空気をエアリザーバタンク１１から後輪側の空気配管１７へ供給すると、圧縮空気の脈動により、エアリザーバタンク１１の材質によっては該エアリザーバタンク１１から高周波の異音が発生する虞があった。
本発明は斯かる実情に鑑み案出されたもので、上述の如きブレーキ操作時に発生する異音の低減，消音を図った電子制御エアブレーキ装置を提供することを目的とする。 However, when high-pressure compressed air is instantaneously supplied from the air reservoir tank 11 to the air piping 17 on the rear wheel side in this way, depending on the material of the air reservoir tank 11, the air reservoir tank 11 may be pulsated by the compressed air. Therefore, there is a risk that high-frequency noise is generated.
The present invention has been devised in view of such circumstances, and an object of the present invention is to provide an electronically controlled air brake device that can reduce and mute abnormal noise generated during brake operation as described above.

斯かる目的を達成するため、請求項１に係る発明は、エアリザーバタンクと後輪用のブレーキチャンバとの間の空気配管に装着されたアクスルモジュレータと、ブレーキバルブからの電気信号によりペダルの踏み込みタイミングと踏み込み量を検出して、前記アクスルモジュレータに制御信号を送るコントロールユニットとを備え、前記アクスルモジュレータは、コントロールユニットからの制御信号から必要と判断される空気圧をエアリザーバタンクからブレーキチャンバへ送って、ブレーキを作動させる電子制御エアブレーキ装置に於て、前記エアリザーバタンクとアクスルモジュレータとの間の空気配管に、該エアリザーバタンクより小容量のエアリザーバタンクを別途装着したことを特徴とする。   In order to achieve such an object, the invention according to claim 1 is directed to an axle modulator mounted on an air pipe between an air reservoir tank and a brake chamber for a rear wheel, and a pedal depression by an electric signal from a brake valve. A control unit that detects a timing and a depression amount and sends a control signal to the axle modulator, and the axle modulator sends an air pressure determined to be necessary from the control signal from the control unit from the air reservoir tank to the brake chamber. In the electronically controlled air brake device for operating the brake, an air reservoir tank having a smaller capacity than the air reservoir tank is separately attached to an air pipe between the air reservoir tank and the axle modulator. .

そして、請求項２に係る発明は、請求項１に記載の電子制御エアブレーキ装置に於て、小容量の前記エアリザーバタンクは、エアリザーバタンクとアクスルモジュレータとの間の左右の後輪用空気配管に、夫々、装着されていることを特徴とする。   According to a second aspect of the present invention, in the electronically controlled air brake device according to the first aspect, the small-capacity air reservoir tank includes air for the left and right rear wheels between the air reservoir tank and the axle modulator. It is characterized by being respectively attached to the piping.

請求項１に係る発明によれば、後輪側ブレーキの作動遅れを防止するため、ドライバーがペダルを踏み込むと、その初期の僅かな踏み込み操作の段階で、コントロールユニットは瞬間的に高圧の圧縮空気をエアリザーバタンクから空気配管へ供給して空気配管内を圧力で満たすが、このブレーキ操作時に、小容量のエアリザーバタンクがその上流側のエアリザーバタンクの急減圧を防止して、急減圧により起こる圧力変動を緩和する。   According to the first aspect of the present invention, when the driver depresses the pedal in order to prevent the operation delay of the rear wheel side brake, the control unit instantaneously pressurizes the high-pressure compressed air when the driver depresses the pedal slightly. Is supplied from the air reservoir tank to the air piping to fill the air piping with pressure.However, during this braking operation, the small-capacity air reservoir tank prevents the upstream air reservoir tank from suddenly depressurizing. Mitigates the pressure fluctuations that occur.

従って、圧縮空気の脈動によって上流側のエアリザーバタンクから高周波の異音が発生することがなくなり、ブレーキ操作時に発生する異音の低減，消音が図れることとなった。
そして、請求項２に係る発明は、エアリザーバタンクとアクスルモジュレータとの間の左右の後輪用の空気配管に、該エアリザーバタンクより小容量のエアリザーバタンクを夫々装着したので、左右の両ブレーキ系統に於ける異音の確実な低減，消音が図れる利点を有する。 Accordingly, high-frequency noise is not generated from the upstream air reservoir tank due to the pulsation of the compressed air, and noise generated during brake operation can be reduced and silenced.
In the invention according to claim 2, since the left and right rear wheel air pipes between the air reservoir tank and the axle modulator are respectively equipped with air reservoir tanks having a capacity smaller than that of the air reservoir tank. This has the advantage that noise can be reliably reduced and silenced in the brake system.

以下、本発明の実施形態を図面に基づいて詳細に説明する。
図１は請求項１及び請求項２の一実施形態に係る電子制御エアブレーキ装置を示し、図中、２１は前輪及び後輪用のエアリザーバタンクで、図示しないエンジンで駆動されるコンプレッサにより圧縮された圧縮空気が該エアリザーバタンク２１に蓄えられ、エアリザーバタンク２１内の空気圧はプレッシャガバナによって所定圧に保持されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an electronically controlled air brake device according to one embodiment of claims 1 and 2, in which 21 is an air reservoir tank for front and rear wheels, which is compressed by a compressor driven by an engine (not shown). The compressed air thus stored is stored in the air reservoir tank 21, and the air pressure in the air reservoir tank 21 is maintained at a predetermined pressure by a pressure governor.

そして、前記エアリザーバタンク２１と後輪用のブレーキチャンバ２３，２５との間に左右の後輪用空気配管２７，２９が接続され、各空気配管２７，２９は、夫々、ブレーキチャンバ２３，２５の上流側で後前輪用と後後輪用とに分岐している。そして、エアリザーバタンク２１とブレーキチャンバ２３，２５との間にアクスルモジュレータ３１が装着されている。   The left and right rear wheel air pipes 27 and 29 are connected between the air reservoir tank 21 and the rear wheel brake chambers 23 and 25. The air pipes 27 and 29 are connected to the brake chambers 23 and 25, respectively. Branches upstream and downstream for rear front wheels and rear rear wheels. An axle modulator 31 is mounted between the air reservoir tank 21 and the brake chambers 23 and 25.

また、図中、３３はブレーキバルブで、ドライバーがブレーキバルブ３３のペダル３５を踏み込むと、ブレーキバルブ３３内部の図示しないスイッチとストロークセンサが、ペダル３５の踏み込みタイミングと踏み込み量（角度）を電気信号としてコントロールユニット３７に送るようになっている。
そして、図２の従来例と同様、コントロールユニット３７は、ブレーキバルブ３３からの電気信号によりペダル３５の踏み込みタイミングと踏み込み量を検出し、踏み込み量に応じた減速度が得られるように、前輪側の図示しないプロポーショナルリレーバルブと後輪側のアクスルモジュレータ３１に制御信号を送るようになっており、プロポーショナルリレーバルブは、内蔵の弁を開いてコントロールユニット３７からの電気信号から必要と判断される空気圧を、エアリザーバタンク２１から左右の前輪用のブレーキチャンバへ送ってブレーキを作動させるようになっている。 In the figure, reference numeral 33 denotes a brake valve. When a driver steps on the pedal 35 of the brake valve 33, a switch and a stroke sensor (not shown) inside the brake valve 33 indicate the timing and amount (angle) of depression of the pedal 35 as an electrical signal. To the control unit 37.
As in the conventional example of FIG. 2, the control unit 37 detects the depression timing and depression amount of the pedal 35 from the electric signal from the brake valve 33, so that the deceleration corresponding to the depression amount can be obtained. The control signal is sent to the proportional relay valve (not shown) and the axle modulator 31 on the rear wheel side. The proportional relay valve opens the built-in valve and determines the air pressure determined to be necessary from the electrical signal from the control unit 37. Is sent from the air reservoir tank 21 to the left and right front wheel brake chambers to actuate the brake.

一方、アクスルモジュレータ３１は、内蔵の弁を開いてコントロールユニット３７の制御信号から必要と判断される空気圧を、エアリザーバタンク２１からブレーキチャンバ２３，２５へ送ってブレーキを作動させる構造となっている。
そして、本実施形態に係る電子制御エアブレーキ装置３９も、後輪側ブレーキの作動遅れを防止するため、ドライバーがペダル３５を踏み込むと、その初期の僅かな踏み込み操作の段階で、コントロールユニット３７はブレーキが作動しない程度に瞬間的に高圧の圧縮空気をエアリザーバタンク２１から空気配管２７，２９へ供給して、空気配管２７，２９内を圧力で満たす制御を行うが、斯様に瞬間的に高圧の圧縮空気をエアリザーバタンク２１から空気配管２７，２９へ供給すると、既述したように圧縮空気の脈動によってエアリザーバタンク２１から高周波の異音が発生してしまう虞がある。 On the other hand, the axle modulator 31 is configured to open a built-in valve and send air pressure determined to be necessary from the control signal of the control unit 37 from the air reservoir tank 21 to the brake chambers 23 and 25 to operate the brake. .
The electronic control air brake device 39 according to this embodiment also controls the control unit 37 when the driver depresses the pedal 35 in order to prevent a delay in the operation of the rear wheel side brake. Control is performed so that high pressure compressed air is instantaneously supplied from the air reservoir tank 21 to the air pipes 27 and 29 to fill the air pipes 27 and 29 with pressure so that the brake is not activated. When high-pressure compressed air is supplied from the air reservoir tank 21 to the air pipes 27 and 29, high-frequency abnormal noise may be generated from the air reservoir tank 21 due to the pulsation of the compressed air as described above.

そこで、本実施形態は、前記エアリザーバタンク２１とアクスルモジュレータ３１との間の左右の後輪用の空気配管２７，２９に、夫々、エアリザーバタンク２１より小容量（例えば、０．５〜１リットル程度）のエアリザーバタンク４１，４３を装着したもので、両エアリザーバタンク４１，４３は同一容量とされている。
そして、前記エアリザーバタンク２１，４１，４３に、エンジンで駆動されるコンプレッサにより圧縮された圧縮空気が蓄えられるようになっている。 Therefore, in the present embodiment, the right and left rear wheel air pipes 27 and 29 between the air reservoir tank 21 and the axle modulator 31 are smaller in capacity than the air reservoir tank 21 (for example, 0.5 to 1). Liters) of air reservoir tanks 41 and 43 are mounted, and both air reservoir tanks 41 and 43 have the same capacity.
In the air reservoir tanks 21, 41, 43, compressed air compressed by a compressor driven by an engine is stored.

本実施形態はこのように構成されているから、後輪側ブレーキの作動遅れを防止するため、ドライバーがペダル３５を踏み込むと、その初期の僅かな踏み込み操作の段階で、コントロールユニット３７は瞬間的に高圧の圧縮空気をエアリザーバタンク２１，４１，４３から空気配管２７，２９へ供給して空気配管２７，２９内を圧力で満たすが、このブレーキ操作時に、エアリザーバタンク２１の下流側に装着された小容量のエアリザーバタンク４１，４３がエアリザーバタンク２１の急減圧を防止して、急減圧により起こる圧力変動を緩和する。   Since the present embodiment is configured as described above, when the driver depresses the pedal 35 in order to prevent the operation delay of the rear wheel side brake, the control unit 37 is instantaneously operated at the initial slight depressing operation stage. High pressure compressed air is supplied from the air reservoir tanks 21, 41, 43 to the air pipes 27, 29 to fill the air pipes 27, 29 with pressure, but is mounted on the downstream side of the air reservoir tank 21 during this braking operation. The small-capacity air reservoir tanks 41 and 43 thus prevented from suddenly depressurizing the air reservoir tank 21 alleviate pressure fluctuations caused by the sudden depressurization.

従って、本実施形態によれば、ブレーキ操作時に瞬間的に高圧の圧縮空気がエアリザーバタンク２１，４１，４３から空気配管２７，２９へ供給されても、圧縮空気の脈動によってエアリザーバタンク２１から高周波の異音が発生することがなくなり、ブレーキ操作時に発生する異音の低減，消音が図れることとなった。
そして、本実施形態は、エアリザーバタンク２１とアクスルモジュレータ３１との間の左右の後輪用の空気配管２７，２９に、エアリザーバタンク４１，４３を夫々装着したので、左右の両ブレーキ系統に於ける異音の確実な低減，消音が図れる利点を有する。 Therefore, according to the present embodiment, even when high-pressure compressed air is instantaneously supplied from the air reservoir tanks 21, 41, 43 to the air pipes 27, 29 during the brake operation, the air reservoir tank 21 is caused by the pulsation of the compressed air. High-frequency noise is no longer generated, and noise generated during braking is reduced and silenced.
In the present embodiment, the air reservoir tanks 41 and 43 are mounted on the left and right rear wheel air pipes 27 and 29 between the air reservoir tank 21 and the axle modulator 31, respectively. This has the advantage that noise can be reliably reduced and silenced.

請求項１及び請求項２の一実施形態に係る電子制御エアブレーキ装置の概略構成図である。It is a schematic block diagram of the electronically controlled air brake device which concerns on one Embodiment of Claim 1 and Claim 2. 従来の電子制御エアブレーキ装置の概略構成図である。It is a schematic block diagram of the conventional electronically controlled air brake device.

符号の説明Explanation of symbols

２１，４１，４３ エアリザーバタンク
２３，２５ ブレーキチャンバ
２７，２９ 空気配管
３１ アクスルモジュレータ
３３ ブレーキバルブ
３５ ペダル
３７ コントロールユニット
３９ 電子制御エアブレーキ装置
21, 41, 43 Air reservoir tanks 23, 25 Brake chambers 27, 29 Air piping 31 Axle modulator 33 Brake valve 35 Pedal 37 Control unit 39 Electronically controlled air brake device

Claims (2)

エアリザーバタンクと後輪用のブレーキチャンバとの間の空気配管に装着されたアクスルモジュレータと、
ブレーキバルブからの電気信号によりペダルの踏み込みタイミングと踏み込み量を検出して、前記アクスルモジュレータに制御信号を送るコントロールユニットとを備え、
前記アクスルモジュレータは、コントロールユニットからの制御信号から必要と判断される空気圧をエアリザーバタンクからブレーキチャンバへ送って、ブレーキを作動させる電子制御エアブレーキ装置に於て、
前記エアリザーバタンクとアクスルモジュレータとの間の空気配管に、該エアリザーバタンクより小容量のエアリザーバタンクを別途装着したことを特徴とする電子制御エアブレーキ装置。 An axle modulator mounted on the air piping between the air reservoir tank and the brake chamber for the rear wheel;
A control unit that detects a pedal depression timing and depression amount by an electric signal from a brake valve and sends a control signal to the axle modulator;
In the electronically controlled air brake device for operating the brake, the axle modulator sends air pressure determined to be necessary from a control signal from the control unit to the brake chamber from the air reservoir tank.
An electronically controlled air brake device, wherein an air reservoir tank having a smaller capacity than the air reservoir tank is separately attached to an air pipe between the air reservoir tank and the axle modulator. 小容量の前記エアリザーバタンクは、エアリザーバタンクとアクスルモジュレータとの間の左右の後輪用空気配管に、夫々、装着されていることを特徴とする請求項１に記載の電子制御エアブレーキ装置。
2. The electronically controlled air brake device according to claim 1, wherein the small-capacity air reservoir tank is mounted on left and right rear wheel air pipes between the air reservoir tank and the axle modulator, respectively. 3. .
JP2007075227A 2007-03-22 2007-03-22 Electronically controlled air brake device Expired - Fee Related JP5064071B2 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50385U (en) * 1973-05-01 1975-01-06
JPS5563945A (en) * 1978-10-31 1980-05-14 Jidosha Kiki Co Ltd Pressure regulating relay valve located in double system air brake circuit
JPS5583153U (en) * 1978-12-06 1980-06-07
JPS59147666U (en) * 1983-03-24 1984-10-02 三菱自動車工業株式会社 Brake device for coupled vehicles
JPH03246149A (en) * 1990-02-26 1991-11-01 Nabco Ltd Pressure source for vehicle
JPH06344875A (en) * 1993-05-28 1994-12-20 Wabco Vermoegensverwaltung Gmbh Method of adjusting braking value to target value
JP2000095096A (en) * 1998-09-25 2000-04-04 Nissan Diesel Motor Co Ltd Braking device for tractor
JP2000168533A (en) * 1998-12-07 2000-06-20 Toyota Motor Corp Braking device
JP2006298133A (en) * 2005-04-20 2006-11-02 Nissan Motor Co Ltd Vehicular brake device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50385U (en) * 1973-05-01 1975-01-06
JPS5563945A (en) * 1978-10-31 1980-05-14 Jidosha Kiki Co Ltd Pressure regulating relay valve located in double system air brake circuit
JPS5583153U (en) * 1978-12-06 1980-06-07
JPS59147666U (en) * 1983-03-24 1984-10-02 三菱自動車工業株式会社 Brake device for coupled vehicles
JPH03246149A (en) * 1990-02-26 1991-11-01 Nabco Ltd Pressure source for vehicle
JPH06344875A (en) * 1993-05-28 1994-12-20 Wabco Vermoegensverwaltung Gmbh Method of adjusting braking value to target value
JP2000095096A (en) * 1998-09-25 2000-04-04 Nissan Diesel Motor Co Ltd Braking device for tractor
JP2000168533A (en) * 1998-12-07 2000-06-20 Toyota Motor Corp Braking device
JP2006298133A (en) * 2005-04-20 2006-11-02 Nissan Motor Co Ltd Vehicular brake device

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