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JP4200641B2 - Brake testing system for vehicles - Google Patents
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JP4200641B2 - Brake testing system for vehicles - Google Patents

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JP4200641B2
JP4200641B2 JP2000237860A JP2000237860A JP4200641B2 JP 4200641 B2 JP4200641 B2 JP 4200641B2 JP 2000237860 A JP2000237860 A JP 2000237860A JP 2000237860 A JP2000237860 A JP 2000237860A JP 4200641 B2 JP4200641 B2 JP 4200641B2
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temperature
test
brake
allowable
cooling
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JP2002048686A (en
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和善 渡辺
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Meidensha Corp
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Meidensha Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、車両用ブレーキの試験システムに係り、特にデュアルブレーキ試験における両輪の温度制御に関する。
【0002】
【従来の技術】
車両用ブレーキは、タイヤと共に回転するロータやドラムにパッドを押圧することでその間に摩擦力を発生させ、車両を減速および停止させることができる。しかし、一方では摩擦力によってパッドに取り付けられた摩擦材やロータが摩耗したり、鳴き音を発生し、さらにはブレーキ振動を招くという問題も起きる。
【0003】
ブレーキ試験は、このよなブレーキを取り巻く現象を把握するために実施される。このブレーキ試験には、さまざまな試験パターンにおける「ブレーキの効き具合」、「部品劣化(摩耗)度合い」、「鳴き音や異音および振動の発生状況」などについて定量的評価を行う。
【0004】
図5は、ブレーキ試験システムの構成例を示す。デュアル供試ブレーキ1R.1Lのロータ(またはドラム)には車両慣性分に合わせたフライホイール2と、試験速度に制御される駆動用モータ3が機械結合される。また、ブレーキ1R.1Lのパッドにはロータへの押圧力を調整できる油圧制御系が設けられる。動力制御盤4は、インバータ等の電力変換器等を内蔵してモータ3と共にダイナモメータを構成し、供試ブレーキを試験速度まで加速して定速駆動する。
【0005】
なお、試験装置および試験方式としては、単体の供試ブレーキの試験方式や、フライホイール2に代えてモータ3自体に慣性力分に相当するトルクを発生させる試験装置など、種々のものがある。
【0006】
操作盤5は、試験条件、すなわち試験に際してダイナモメータの試験速度や供試ブレーキ1R.1Lでの油圧やトルク、試験回数などの信号変換とその出力を行う。また、試験中は、供試ブレーキ等からの各種計測データをサンプリングでディジタル量に変換して取り込む。
【0007】
計測制御部は、その計測・制御PC(コンピュータ)6によって操作盤5を通して試験に必要な制御出力を発生し、逆に操作盤5を通した計測データを収集する。また、鳴き計測PC7では、操作盤5を通したブレーキの鳴き音を波形データとして収集する。鳴き再生PC8では、収集した鳴き音の波形データを音としてスピーカで再生することができる。
【0008】
管理部9は、計測・制御部と操作部10の間のネットーワーク接続および試験情報の送受信を行う。ホストコンピュータ構成の操作部10では、管理部9を通して、試験者による各種試験条件の設定と試験開始操作及び試験結果情報の収集を行う。
【0009】
上記のような試験システムによるブレーキ試験には、図6に試験パターンを示すように、時刻t1でダイナモメータによる加速を行い、一定速度にした後、時刻t2で油圧制御系によりパッドをロータに押圧して制動させるという制御を1サイクル期間に多数回繰り返し、その都度計測データを収集して供試ブレーキの性能評価を行う。制動力は、試験開始に際してB1やB2に設定される。また、試験パターンは、制動力B3のように、1サイクル内で異なる制動力に自動で切り替える場合もある。
【0010】
【発明が解決しようとする課題】
試験には、一定速度までの加速とその速度からの制動という加速と制動を一定時間間隔を持たせて繰り返し行う時間サイクル試験がある。この試験では、図7に示すように、制動を行う毎にブレーキの温度が上昇し、加速期間に温度が下がる。しかも、デュアルブレーキ試験では、両輪のロータとパッドの取り付け時の間隙(クリアランス)の違いやブレーキの効き方の違いによりその温度の上昇率や下降率が異なり、やがては両輪の温度に大きな違いがでてくる。
【0011】
この温度差が大きくなることは、両輪での試験条件が異なるものになり、試験精度に影響してくる。特に、新しいブレーキの試験ではどのような温度差になるか不明のため、試験のやり直しや試験の失敗になる場合がある。
【0012】
この問題を解消するには、両輪の温度差が大きくなったことを検出し、温度差が一定値以下に冷えるまで待ち、この後に試験を再開する方法が考えられる。しかし、この方法では、時間サイクル試験の時間間隔を試験パターンとは違ったものにしてしまう。
【0013】
本発明の目的は、デュアルブレーキの両輪の温度差を許容範囲内に保ちながら時間サイクル試験のパターンに合わせた試験ができるブレーキ試験システムを提供することにある。
【0014】
【課題を解決するための手段】
本発明は、前記課題を解決するため、両輪ブレーキに設定する基準温度と許容範囲の関係からそれぞれ許容温度範囲を算定しておき、加速と制動のサイクル試験毎に両輪の温度が許容温度範囲を越えていないかチェックし、範囲外の場合は冷却装置による冷却または昇温装置による昇温を行い、範囲内のときは計測データを取得するようにしたもので、以下の構成を特徴とする。
【0015】
車両の両輪に取り付けた一対の供試ブレーキに応じた試験条件を設定し、ダイナモメータによって供試ブレーキのロータまたはドラムを設定速度まで加速し、油圧制御系の油圧制御によって供試ブレーキのロータまたはドラムにパッドを押圧する制動を試験パターンに応じて繰り返し行う車両用ブレーキの試験システムにおいて、
前記一対の供試ブレーキにはそれぞれを冷却できる冷却装置と昇温できる昇温装置および温度検出器を設け、
前記一対の供試ブレーキにそれぞれ許容温度範囲を設定しておき、
前記一対の供試ブレーキに対して加速と制動を行う都度、前記温度検出器の検出温度が前記許容温度範囲を外れたか否かを判定し、範囲内のときは計測データを取得し、範囲外のときは当該供試ブレーキの温度が前記許容温度範囲内になるよう前記冷却装置または昇温装置により冷却制御または昇温制御する手段を備え、
前記許容温度範囲は、一対の供試ブレーキの一方を基準側ブレーキとして他方を反対側ブレーキとし、基準側と反対側のそれぞれの低温側設定温度の交点(A)と、高温側設定温度の交点(B)にした2点を設定し、前記低温側設定温度の交点(A)に設定される上下限温度点と前記高温側設定温度の交点(B)に設定される上下限温度点の間を直線補間して2点間の許容温度範囲を決定し、基準側の該2点よりも低温側及び高温側は該2点を結ぶ直線から平行移動して低温側と高温側の許容温度範囲を決定する手段を備えたことを特徴とする。
【0017】
前記冷却装置は供試ブレーキの温度が前記許容温度範囲に対してオーバの場合に前記一対の供試ブレーキ位置に設けた冷却ブロアをオンさせて供試ブレーキを冷却し、前記昇温装置は供試ブレーキの温度が前記許容温度範囲に対してアンダーの場合に前記一対の供試ブレーキを設定する引き摺り条件と速度で制動動作させることで昇温させることを特徴とする。
【0018】
【発明の実施の形態】
本実施形態は、対の供試ブレーキが取り付けられた両輪に許容温度範囲を設定し、この温度範囲から外れたときに冷却装置(例えば冷却ブロア)による冷却または昇温装置(例えばブレーキ動作の実行)による昇温を行って両ブレーキを許容温度範囲内に維持しながらブレーキ試験を行う。なお、左右車輪に設けられるデュアルブレーキの一方を温度制御のための基準車輪とし、他方を反対車輪と呼ぶ。また、基準車輪および反対車輪には個別に温度検出器を設けておく。また、基準車輪および反対車輪にはそれぞれを強制冷却できる冷却ブロアをその運転/停止制御手段と共に設ける。
【0019】
図1は、本実施形態になるデュアルブレーキの試験手順である。まず、試験開始に際して、試験条件設定(試験パターンに従ったタイムインターバルや繰り返し回数、パッドの押圧力など)の他に、基準車輪および反対車輪の温度条件設定を行う(S1)。
【0020】
この温度条件設定は、例えば、図2に示す温度条件設定例を示し、操作画面上で設定する。図2では、基準車輪をNo1、反対車輪をNo2として示し、それぞれの車輪での温度測定部位の表示や制御対象輪を設定し、設定温度は2点の温度とその温度範囲を設定する。同図では、2点の温度はNo1では低温側の40℃と高温側の250℃、No2では低温側の40℃と高温側の150℃とし、高温側で温度差を付ける場合である。また、2点の温度には低温側では±20℃、高温側では±50℃の許容温度範囲を設定する。
【0021】
次に、この温度条件設定と直線補間により各温度での許容温度範囲を自動的に算定する(S2)。この直線補間例を図3に示す。同図においては、点Aは、図2の設定によって基準車輪と反対車輪で同じ低温側設定温度40℃の交点になる。また、点Bは基準車輪の高温設定温度250℃と反対車輪の高温設定温度150℃との交点になる。そして、それぞれの点A,Bにおける許容温度範囲±20℃、±50℃の点を結ぶ直線で許容温度範囲を算定する。また、点A以下の許容温度範囲及び点B以上の許容温度範囲は、点A,Bを結ぶ温度基準線から±20℃及び±50℃を持たせて平行移動することで許容温度範囲を算定する。
【0022】
次に、ブレーキ動作でブレーキを昇温させたり、冷却ブロアの運転で降温させるための昇・降温制御用定数を設定する(S3)。この例を図4中に示し、図3の画面と共に表示するアクティブ画面上で、図3の許容温度範囲をアンダーしたときの昇温のための引き摺り加圧タイム(制動時間)と引き摺り加圧インターバル(加速と定速時間)や引き摺り油圧(パッドの押圧力)を設定し、オーバしたときの冷却ブロアによる冷却を得るための運転速度を設定し、昇・降温制御を開始する上下限温度を設定する。これら設定値はブレーキ試験条件とは別途に設定する。
【0023】
これら設定により、図4中に示すように、例えば、高温(150℃)側での許容温度範囲に対して、測定温度がケース1〜12の場合には、表中に示す昇・降温制御を行うことになる。例えば、ケース1では、基準車輪(H側、高温側車輪)は下限範囲以下で、反対車輪(L側、低温側車輪)では下限範囲以下の温度にある場合であり、この場合には表中に示すように昇温制御(ブレーキ制御)を行うことで両輪共に昇温させる。また、ケース4では、基準車輪は下限範囲以下で、反対車輪では上限範囲以上の温度にある場合であり、この場合には反対車輪側を冷却することで反対車輪温度をその許容温度範囲になるようにする。
【0024】
同様に、ケース9では、基準車輪は上限範囲以上で、反対車輪では下限範囲以下の温度にある場合であり、この場合には基準車輪を冷却し、反対車輪を昇温させることで両車輪温度をその許容温度範囲になるようにする。ケース12では、基準車輪および反対車輪共に上限範囲以上の温度にある場合であり、この場合には基準車輪および反対車輪共に冷却するることで両車輪温度をその許容温度範囲になるようにする。
【0025】
これらケース別の制御は、図1の処理S6〜S13で行われる。これら処理を含めた制御を以下に説明する。
【0026】
昇降温制御定数設定の後、ダイナモメータの運転を開始し、試験パターンとして設定される一定速度までの加速制御(S4)、一定速度からの油圧制御系の制御による制動制御(S5)を行う。この制動において、両輪温度データを取得する(S6)。この温度データについて、処理S2で設定した許容温度範囲内かアンダーかオーバかを判定する(S7,S8)。
【0027】
基準車輪についての判定では、オーバの場合はそのブロアをオン(運転)させて加速処理S4で定速運転で冷却を開始し(S9)、アンダーの場合はブロアをオフ(停止)させて制動処理S5で引き摺り運転による昇温を可能にし(S10)、範囲内の場合は計測データを取得する(S13)。同様に、反対車輪についての判定では、オーバの場合はそのブロアをオン(運転)させて冷却を開始し(S11)、アンダーの場合はブロアをオフ(停止)させ(S12)、範囲内の場合は計測データを取得する(S13)。すなわち、車輪温度が許容温度範囲外になる場合は昇温または冷却を開始し、かつ今回の制動試験での計測データを不適切なものとしてその取得を行わない。
【0028】
次に、計測データを取得した試験回数nと設定回数Nを比較し(S14)、n<Nの場合には次回の加速とその後の制動試験を開始する。この制動試験に際して、昇温制御をする場合には、基準車輪および反対車輪別に、昇・降温制御用定数として設定した条件による速度制御と制動制御を行い、当該車輪の温度を許容温度範囲になるようにする。また、冷却の場合は制動を行うことなく加速制御のみを行う。また、これら昇温と冷却では試験回数nは現在値に保持する。
【0029】
n=Nになるまで試験と昇・降温制御を繰り返したとき、1サイクルの試験完了とし、同じ条件で次のサイクル試験を行う場合には処理S4に戻る(S15)。
【0030】
なお、冷却装置としては自然風による冷却ブロアで説明するが、冷房装置を組み合わせた温度コントロールした冷却装置などに置換できる。また、昇温はブレーキ動作で得る場合を示すが、熱風をブレーキに吹き付ける機能をもつ装置と置換または併用する構成でもよい。
【0031】
【発明の効果】
以上のとおり、本発明によれば、両輪ブレーキに設定する基準温度と許容範囲の関係からそれぞれ許容温度範囲を算定しておき、加速と制動のサイクル試験毎に両輪の温度が許容温度範囲を越えていないかチェックし、範囲外の場合は冷却装置による冷却または昇温装置による昇温を行い、範囲内のときは計測データを取得するようにしたため、両輪ブレーキの温度差を許容範囲内に保ちながら時間サイクル試験のパターンに合わせた試験ができる。
【0032】
特に、新規の供試ブレーキ試験では、その温度変化が不明であるが、設定する許容温度範囲にした試験ができ、試験失敗ややり直しを起こすことはない。
【0033】
また、冷却装置や昇温装置による温度制御をしながら試験を継続でき、試験パターンに合わせた試験ができる。
【0034】
また、許容温度範囲は、基準温度と許容温度差を設定するのみで直線補間するため、その設定が簡単になる。
【0035】
また、昇温はブレーキ動作制御とし、降温は冷却ブロアの運転とすることで、昇降温制御のための装置が簡単になる。
【図面の簡単な説明】
【図1】本発明の実施形態を示すデュアルブレーキの試験手順。
【図2】実施形態における温度条件設定例。
【図3】実施形態における許容温度範囲の例。
【図4】実施形態における定数設定と制御範囲の例。
【図5】ブレーキ試験システムの構成例。
【図6】ブレーキ試験パターンの説明図。
【図7】デュアルブレーキの温度変化例。
【符号の説明】
1R,1L…供試ブレーキ
2…フライホイール
3…モータ
4…動力制御盤
5…操作盤
6…計測・制御PC
7…鳴き計測PC
8…鳴き再生PC
9…管理部
10…操作部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle brake test system, and more particularly to temperature control of both wheels in a dual brake test.
[0002]
[Prior art]
The vehicle brake can press the pad against a rotor or drum that rotates together with the tire to generate a frictional force therebetween, thereby decelerating and stopping the vehicle. However, on the other hand, there is a problem that the friction material and the rotor attached to the pad are worn by the frictional force, the noise is generated, and the brake vibration is caused.
[0003]
The brake test is conducted to grasp the phenomenon surrounding such a brake. In this brake test, quantitative evaluations are made on the "brake effectiveness", "part deterioration (wear) degree", "sound noise, abnormal noise and vibration occurrence" in various test patterns.
[0004]
FIG. 5 shows a configuration example of the brake test system. Dual test brake 1R. A 1 L rotor (or drum) is mechanically coupled with a flywheel 2 that is adapted to the vehicle inertia and a drive motor 3 that is controlled by the test speed. In addition, the brake 1R. The 1 L pad is provided with a hydraulic control system capable of adjusting the pressing force to the rotor. The power control panel 4 incorporates a power converter such as an inverter and constitutes a dynamometer together with the motor 3, and accelerates the test brake to the test speed and drives it at a constant speed.
[0005]
There are various test apparatuses and test systems, such as a test system for a single test brake and a test apparatus for generating torque corresponding to the inertial force in the motor 3 itself instead of the flywheel 2.
[0006]
The operation panel 5 has test conditions, that is, the test speed of the dynamometer and the test brake 1R. Signal conversion and output of oil pressure, torque, number of tests, etc. at 1L. In addition, during the test, various measurement data from the test brake or the like are sampled and converted into digital quantities.
[0007]
The measurement control unit generates a control output necessary for the test through the operation panel 5 by the measurement / control PC (computer) 6, and conversely collects measurement data through the operation panel 5. Further, the squeal measurement PC 7 collects the squeal of the brake that has passed through the operation panel 5 as waveform data. In the sound reproduction PC 8, the collected waveform data of the sound can be reproduced as sound by a speaker.
[0008]
The management unit 9 performs network connection and transmission / reception of test information between the measurement / control unit and the operation unit 10. In the operation unit 10 having the host computer configuration, the tester sets various test conditions, performs a test start operation, and collects test result information through the management unit 9.
[0009]
The brake test by the test system as described above, as shown in the test pattern in FIG. 6, performs acceleration by the dynamometer at time t 1, after a constant speed, the rotor pad by a hydraulic control system at time t 2 The control of pressing and braking is repeated many times in one cycle period, and the measurement data is collected each time to evaluate the performance of the test brake. The braking force is set to B 1 or B 2 at the start of the test. Further, the test pattern, so that the braking force B 3, it may automatically switch to a different braking force in one cycle.
[0010]
[Problems to be solved by the invention]
The test includes a time cycle test in which acceleration and braking of acceleration up to a constant speed and braking from that speed are repeated with a constant time interval. In this test, as shown in FIG. 7, the temperature of the brake increases each time braking is performed, and the temperature decreases during the acceleration period. Moreover, in the dual brake test, the temperature rise and fall rates differ depending on the difference in clearance (clearance) when attaching the rotor and pads of both wheels and the way the brakes work, and eventually there is a big difference in the temperature of both wheels. Come on.
[0011]
If this temperature difference becomes large, the test conditions for both wheels will be different, which will affect the test accuracy. In particular, since it is unclear what temperature difference will occur in a new brake test, the test may be repeated or the test may fail.
[0012]
To solve this problem, it is conceivable to detect that the temperature difference between the two wheels has increased, wait until the temperature difference cools below a certain value, and then restart the test. However, this method makes the time interval of the time cycle test different from the test pattern.
[0013]
An object of the present invention is to provide a brake test system capable of performing a test in accordance with a time cycle test pattern while keeping a temperature difference between both wheels of a dual brake within an allowable range.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention calculates the allowable temperature range from the relationship between the reference temperature set for the two-wheel brake and the allowable range, and the temperature of the two wheels satisfies the allowable temperature range for each cycle test of acceleration and braking. It is checked whether or not it has exceeded, and if it is out of the range, cooling by the cooling device or temperature rise by the temperature raising device is performed, and if it is within the range, measurement data is acquired.
[0015]
Set the test conditions according to the pair of test brakes attached to both wheels of the vehicle, accelerate the rotor or drum of the test brake to the set speed by the dynamometer, and set the rotor or the test brake by hydraulic control of the hydraulic control system. In a vehicle brake test system that repeatedly performs braking to press a pad against a drum according to a test pattern,
The pair of test brakes is provided with a cooling device capable of cooling each, a temperature raising device capable of raising the temperature, and a temperature detector,
An allowable temperature range is set for each of the pair of test brakes,
Each time acceleration and braking are performed on the pair of test brakes, it is determined whether or not the temperature detected by the temperature detector is out of the allowable temperature range. In this case, it is provided with means for cooling control or temperature rise control by the cooling device or the temperature raising device so that the temperature of the test brake is within the allowable temperature range,
The allowable temperature range is defined as one of a pair of test brakes as a reference brake and the other as an opposite brake, the intersection of the low temperature side set temperature (A) on the opposite side of the reference side and the intersection of the high temperature side set temperature. (B) is set between the upper and lower limit temperature points set at the intersection (A) of the low temperature side set temperature and the upper and lower limit temperature points set at the intersection (B) of the high temperature side set temperature. The allowable temperature range between the two points is determined by linear interpolation, and the lower temperature side and the higher temperature side than the two points on the reference side move in parallel from the straight line connecting the two points, and the allowable temperature range on the low temperature side and the high temperature side It is characterized by having means for determining .
[0017]
The cooling device is allowed to turn on the cooling blower provided in the pair of test braking position in the case of over-temperature to the allowable temperature range of the test brake cooling the test braking, the temperature-raising device is subjected When the temperature of the test brake is under the allowable temperature range, the temperature is raised by performing a braking operation at a drag condition and speed for setting the pair of test brakes.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
In this embodiment, an allowable temperature range is set for both wheels to which a pair of test brakes are attached, and when the temperature is out of this temperature range, cooling by a cooling device (for example, a cooling blower) or a temperature raising device (for example, execution of a brake operation) The brake test is performed while maintaining both brakes within the allowable temperature range by raising the temperature in step 2). One of the dual brakes provided on the left and right wheels is referred to as a reference wheel for temperature control, and the other is referred to as an opposite wheel. In addition, a temperature detector is separately provided for the reference wheel and the opposite wheel. The reference wheel and the opposite wheel are each provided with a cooling blower that can forcibly cool the wheel and the operation / stop control means.
[0019]
FIG. 1 shows a test procedure for a dual brake according to the present embodiment. First, at the start of the test, in addition to the test condition setting (time interval and number of repetitions according to the test pattern, pad pressing force, etc.), temperature conditions for the reference wheel and the opposite wheel are set (S1).
[0020]
This temperature condition setting is, for example, set on the operation screen as shown in the temperature condition setting example shown in FIG. In FIG. 2, the reference wheel is indicated as No 1 and the opposite wheel is indicated as No 2, the display of the temperature measurement part and the control target wheel at each wheel are set, and the set temperature is set at two temperatures and its temperature range. In this figure, the temperature at the two points is 40 ° C. on the low temperature side and 250 ° C. on the high temperature side for No1, and 40 ° C. on the low temperature side and 150 ° C. on the high temperature side for No2. In addition, an allowable temperature range of ± 20 ° C. on the low temperature side and ± 50 ° C. on the high temperature side is set for the two points.
[0021]
Next, the allowable temperature range at each temperature is automatically calculated by this temperature condition setting and linear interpolation (S2). An example of this linear interpolation is shown in FIG. In the figure, the point A becomes an intersection of the same low temperature side set temperature of 40 ° C. on the wheel opposite to the reference wheel by the setting of FIG. Point B is the intersection of the high temperature set temperature 250 ° C. of the reference wheel and the high temperature set temperature 150 ° C. of the opposite wheel. Then, the allowable temperature range is calculated by a straight line connecting the allowable temperature ranges ± 20 ° C. and ± 50 ° C. at the points A and B. Also, the allowable temperature range below point A and the allowable temperature range above point B are calculated in parallel by moving ± 20 ° C and ± 50 ° C from the temperature reference line connecting points A and B. To do.
[0022]
Next, a temperature increase / decrease control constant for increasing the temperature of the brake by the brake operation or decreasing the temperature by operating the cooling blower is set (S3). This example is shown in FIG. 4, and on the active screen displayed together with the screen of FIG. 3, drag pressurization time (braking time) and drag pressurization interval for raising the temperature when the allowable temperature range of FIG. (Acceleration and constant speed time) and drag hydraulic pressure (pad pressing force) are set, the operation speed is set to obtain cooling by the cooling blower when it is over, and the upper and lower temperature limits for starting up and down temperature control are set. To do. These set values are set separately from the brake test conditions.
[0023]
With these settings, as shown in FIG. 4, for example, when the measured temperature is cases 1 to 12 with respect to the allowable temperature range on the high temperature (150 ° C.) side, the temperature increase / decrease control shown in the table is performed. Will do. For example, in Case 1, the reference wheel (H side, high temperature side wheel) is at a temperature below the lower limit range, and the opposite wheel (L side, low temperature side wheel) is at a temperature below the lower limit range. As shown in FIG. 5, the temperature of both wheels is raised by performing temperature rise control (brake control). In case 4, the reference wheel is below the lower limit range and the opposite wheel is at a temperature above the upper limit range. In this case, the opposite wheel temperature falls within the allowable temperature range by cooling the opposite wheel side. Like that.
[0024]
Similarly, in case 9, the reference wheel is at a temperature above the upper limit range and at the opposite wheel at a temperature below the lower limit range. In this case, the reference wheel is cooled, and the temperature of both wheels is increased by raising the temperature of the opposite wheel. Within the allowable temperature range. In case 12, both the reference wheel and the opposite wheel are at a temperature exceeding the upper limit range. In this case, both the wheel temperature falls within the allowable temperature range by cooling both the reference wheel and the opposite wheel.
[0025]
These case-specific controls are performed in steps S6 to S13 in FIG. Control including these processes will be described below.
[0026]
After setting the temperature increase / decrease control constant, the operation of the dynamometer is started, and acceleration control (S4) up to a constant speed set as a test pattern and braking control (S5) by control of the hydraulic control system from the constant speed are performed. In this braking, temperature data for both wheels is acquired (S6). It is determined whether the temperature data is within the allowable temperature range set in step S2 or under or over (S7, S8).
[0027]
In the determination on the reference wheel, if it is over, the blower is turned on (running) and cooling is started at a constant speed operation in acceleration processing S4 (S9). If it is under, the blower is turned off (stopped) and braking processing is performed. In S5, the temperature can be raised by the drag operation (S10), and if it is within the range, the measurement data is acquired (S13). Similarly, in the determination on the opposite wheel, if it is over, the blower is turned on (running) and cooling is started (S11). If it is under, the blower is turned off (stopped) (S12). Acquires measurement data (S13). That is, when the wheel temperature is out of the allowable temperature range, temperature increase or cooling is started, and measurement data in the current braking test is regarded as inappropriate and is not acquired.
[0028]
Next, the test number n for which the measurement data is acquired is compared with the set number N (S14). If n <N, the next acceleration and the subsequent braking test are started. In this braking test, when temperature increase control is performed, speed control and braking control are performed for each of the reference wheel and the opposite wheel according to the conditions set as the temperature increase / decrease control constant, and the temperature of the wheel falls within the allowable temperature range. Like that. In the case of cooling, only acceleration control is performed without braking. In these temperature rise and cooling, the test number n is kept at the current value.
[0029]
When the test and the temperature increase / decrease control are repeated until n = N, the test for one cycle is completed, and when the next cycle test is performed under the same conditions, the process returns to step S4 (S15).
[0030]
Although the cooling device will be described as a cooling blower using natural wind, it can be replaced with a temperature controlled cooling device combined with a cooling device. Moreover, although the case where temperature rise is obtained by a brake operation is shown, the structure which substitutes or uses together with the apparatus which has a function which blows a hot air on a brake may be sufficient.
[0031]
【The invention's effect】
As described above, according to the present invention, the allowable temperature range is calculated from the relationship between the reference temperature set for the two-wheel brake and the allowable range, and the temperature of both wheels exceeds the allowable temperature range for each acceleration and braking cycle test. If the temperature is out of the range, the temperature is cooled by the cooling device or the temperature is raised by the temperature raising device, and if it is within the range, the measurement data is acquired, so the temperature difference between the brakes of both wheels is kept within the allowable range. However, a test that matches the pattern of the time cycle test can be performed.
[0032]
In particular, in the new test brake test, the temperature change is unknown, but the test can be performed within the set allowable temperature range, and no test failure or redo occurs.
[0033]
Further, the test can be continued while the temperature is controlled by the cooling device or the temperature raising device, and the test according to the test pattern can be performed.
[0034]
In addition, since the allowable temperature range is linearly interpolated only by setting the reference temperature and the allowable temperature difference, the setting is simple.
[0035]
Moreover, the apparatus for temperature raising / lowering control becomes simple by making temperature rising into brake operation control, and making temperature down into operation of a cooling blower.
[Brief description of the drawings]
FIG. 1 is a test procedure of a dual brake showing an embodiment of the present invention.
FIG. 2 is a temperature condition setting example in the embodiment.
FIG. 3 shows an example of an allowable temperature range in the embodiment.
FIG. 4 shows an example of constant setting and control range in the embodiment.
FIG. 5 shows a configuration example of a brake test system.
FIG. 6 is an explanatory diagram of a brake test pattern.
FIG. 7 shows an example of temperature change of a dual brake.
[Explanation of symbols]
1R, 1L ... test brake 2 ... flywheel 3 ... motor 4 ... power control panel 5 ... operation panel 6 ... measurement / control PC
7 ... Squeeze measurement PC
8 ... Sound playback PC
9 ... Management unit 10 ... Operation unit

Claims (2)

車両の両輪に取り付けた一対の供試ブレーキに応じた試験条件を設定し、ダイナモメータによって供試ブレーキのロータまたはドラムを設定速度まで加速し、油圧制御系の油圧制御によって供試ブレーキのロータまたはドラムにパッドを押圧する制動を試験パターンに応じて繰り返し行う車両用ブレーキの試験システムにおいて、
前記一対の供試ブレーキにはそれぞれを冷却できる冷却装置と昇温できる昇温装置および温度検出器を設け、
前記一対の供試ブレーキにそれぞれ許容温度範囲を設定しておき、
前記一対の供試ブレーキに対して加速と制動を行う都度、前記温度検出器の検出温度が前記許容温度範囲を外れたか否かを判定し、範囲内のときは計測データを取得し、範囲外のときは当該供試ブレーキの温度が前記許容温度範囲内になるよう前記冷却装置または昇温装置により冷却制御または昇温制御する手段を備え、
前記許容温度範囲は、一対の供試ブレーキの一方を基準側ブレーキとして他方を反対側ブレーキとし、基準側と反対側のそれぞれの低温側設定温度の交点(A)と、高温側設定温度の交点(B)にした2点を設定し、前記低温側設定温度の交点(A)に設定される上下限温度点と前記高温側設定温度の交点(B)に設定される上下限温度点の間を直線補間して2点間の許容温度範囲を決定し、基準側の該2点よりも低温側及び高温側は該2点を結ぶ直線から平行移動して低温側と高温側の許容温度範囲を決定する手段を備えたことを特徴とする車両用ブレーキの試験システム。
Set the test conditions according to the pair of test brakes attached to both wheels of the vehicle, accelerate the rotor or drum of the test brake to the set speed by the dynamometer, and set the rotor or the test brake by hydraulic control of the hydraulic control system. In a vehicle brake test system that repeatedly performs braking to press a pad against a drum according to a test pattern,
The pair of test brakes is provided with a cooling device capable of cooling each, a temperature raising device capable of raising the temperature, and a temperature detector,
An allowable temperature range is set for each of the pair of test brakes,
Each time acceleration and braking are performed on the pair of test brakes, it is determined whether or not the temperature detected by the temperature detector is out of the allowable temperature range. In this case, it is provided with means for cooling control or temperature rise control by the cooling device or the temperature raising device so that the temperature of the test brake is within the allowable temperature range,
The allowable temperature range is defined as one of a pair of test brakes as a reference brake and the other as an opposite brake, the intersection of the low temperature side set temperature (A) on the opposite side of the reference side and the intersection of the high temperature side set temperature. (B) is set between the upper and lower limit temperature points set at the intersection (A) of the low temperature side set temperature and the upper and lower limit temperature points set at the intersection (B) of the high temperature side set temperature. The allowable temperature range between the two points is determined by linear interpolation, and the lower temperature side and the higher temperature side than the two points on the reference side move in parallel from the straight line connecting the two points, and the allowable temperature range on the low temperature side and the high temperature side A vehicle brake test system comprising means for determining
前記冷却装置は供試ブレーキの温度が前記許容温度範囲に対してオーバの場合に前記一対の供試ブレーキ位置に設けた冷却ブロアをオンさせて供試ブレーキを冷却し、前記昇温装置は供試ブレーキの温度が前記許容温度範囲に対してアンダーの場合に前記一対の供試ブレーキを設定する引き摺り条件と速度で制動動作させることで昇温させることを特徴とする請求項1に記載の車両用ブレーキの試験システム。The cooling device is allowed to turn on the cooling blower provided in the pair of test braking position in the case of over-temperature to the allowable temperature range of the test brake cooling the test braking, the temperature-raising device is subjected 2. The vehicle according to claim 1, wherein when the temperature of the test brake is under the allowable temperature range, the temperature is raised by performing a braking operation at a drag condition and a speed for setting the pair of test brakes. Brake testing system.
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KR101525898B1 (en) * 2013-10-21 2015-06-03 상신브레이크(주) Device for testing automatic adjuster of brake system

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CN110320471B (en) * 2019-08-14 2024-07-02 重庆交通大学 Multi-working-condition simulation test bed based on multi-axis input type double-rotor motor
CN112874499A (en) * 2021-01-15 2021-06-01 合肥青冠机电科技有限公司 Brake monitoring system
CN116973131B (en) * 2023-09-14 2023-12-08 山东梁山华宇集团汽车制造有限公司 Test method and system for acquiring braking performance parameters of braking system

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Publication number Priority date Publication date Assignee Title
KR101525898B1 (en) * 2013-10-21 2015-06-03 상신브레이크(주) Device for testing automatic adjuster of brake system

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