JPH0214652B2 - - Google Patents
Info
- Publication number
- JPH0214652B2 JPH0214652B2 JP59175576A JP17557684A JPH0214652B2 JP H0214652 B2 JPH0214652 B2 JP H0214652B2 JP 59175576 A JP59175576 A JP 59175576A JP 17557684 A JP17557684 A JP 17557684A JP H0214652 B2 JPH0214652 B2 JP H0214652B2
- Authority
- JP
- Japan
- Prior art keywords
- braking force
- difference
- flywheel
- measure
- rollers
- 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.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
- G01L5/282—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes the vehicle wheels cooperating with rotatable rolls
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0072—Wheeled or endless-tracked vehicles the wheels of the vehicle co-operating with rotatable rolls
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はシヤーシダイナモ、特に車両の制動力
特性を正確に計測することのできる改良されたシ
ヤーシダイナモに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a chassis dynamometer, and particularly to an improved chassis dynamometer that can accurately measure the braking force characteristics of a vehicle.
［従来の技術］
車両の走行状態における動力特性を模擬計測す
るためにシヤーシダイナモが用いられており、静
止した車両の駆動車輪をシヤーシダイナモの一対
のローラに接触させ、定置位置で実際の走行に近
い動力測定を行うことができる。[Prior Art] A chassis dynamo is used to simulate and measure the power characteristics of a vehicle under running conditions. It is possible to measure power similar to that during driving.
第２図には従来における一般的にシヤーシダイ
ナモが示されており、車両の左右車輪に対応して
設けられた一対のローラ１０，１２にはそれぞれ
車両重量と等価の慣性量をシミユレートするフラ
イホイール１４，１６がそれぞれ接続されてお
り、またこれら両フライホイール１４，１６には
動力計１８，２０が接続され、車両の加減速時に
おける動力測定が行われる。 FIG. 2 shows a conventional chassis dynamo, in which a pair of rollers 10 and 12 provided corresponding to the left and right wheels of a vehicle each have a flywheel that simulates an amount of inertia equivalent to the weight of the vehicle. Wheels 14 and 16 are connected to each other, and dynamometers 18 and 20 are connected to both flywheels 14 and 16 to measure power during acceleration and deceleration of the vehicle.
このような従来のシヤーシダイナモにおいて
は、前記ローラ１０，１２とフライホイール１
４，１６との間にそれぞれ軸トルク計２２，２４
が設けられ、左右車輪に対してそれぞれの軸トル
クが計測可能となつており、これによつて、車両
の制動力特性の評価も可能となる。 In such a conventional chassis dynamo, the rollers 10 and 12 and the flywheel 1
4 and 16, shaft torque meters 22 and 24, respectively.
is provided so that the shaft torque of each of the left and right wheels can be measured, thereby making it possible to evaluate the braking force characteristics of the vehicle.
しかしながら、このような従来のシヤーシダイ
ナモでは、ブレーキの全制動特性のごとき制動ト
ルクの大きな場合の評価に対しては良好なデータ
を提供することができ、各々の軸トルク計２２，
２４にてそれぞれの制動力を計測し、これら両出
力値の差から左右のトルク差を求めることが行わ
れていたが、一方において、このような左右独立
の計測においては、低制動力領域では高精度の計
測ができないという問題があつた。すなわち、低
制動力領域では、左右の軸トルクの差も微小値で
あり、第２図に示した従来装置では各々の軸トル
ク計２２，２４の誤差成分が加算される結果前述
した微小トルク差の計測が実際上不可能となつて
しまう欠点を有していた。 However, such a conventional chassis dynamometer can provide good data for evaluating cases where the braking torque is large, such as the total braking characteristics of the brake, and each shaft torque meter 22,
24, and the left and right torque difference was calculated from the difference between these two output values, but on the other hand, in such independent left and right measurements, in the low braking force region, There was a problem that high-precision measurements could not be made. That is, in the low braking force region, the difference between the left and right shaft torques is also a minute value, and in the conventional device shown in FIG. It had the disadvantage that it was practically impossible to measure it.
前記低制動力領域での計測は例えばブレーキ鳴
き試験において有用であり、通常５〜20Km毎時程
度の低速走行状態から通常の減速制動を行うとき
に発生するいわゆるブレーキ鳴き現象をシヤーシ
ダイナモにて解析する際に有用である。 Measurements in the low braking force range are useful, for example, in brake squeal tests, and a chassis dynamo is used to analyze the so-called brake squeal phenomenon that occurs when normal deceleration braking is performed from a low-speed driving state of about 5 to 20 km/h. It is useful when
前記ブレーキ鳴きの解析は低制動力領域におい
て左右の制動力差を正確に計測する必要があり、
従来のブレーキ鳴き解析では熟練者の感覚に頼つ
て行われていたが、このような左右制動力を精密
に解析可能であれば、更に良好な分析が可能とな
るが、従来のシヤーシダイナモにおいてはこのよ
うな微小制動力差を高精度で測定することが困難
なため、ブレーキ鳴き試験にシヤーシダイナモを
有効に活用することができないという問題があつ
た。 In order to analyze the brake squeal, it is necessary to accurately measure the difference in braking force between the left and right brakes in the low braking force region.
Conventional brake noise analysis relies on the senses of experts, but if it were possible to precisely analyze left and right braking forces like this, even better analysis would be possible, but conventional chassis dynamometers Since it is difficult to measure such small differences in braking force with high precision, there was a problem in that the chassis dynamometer could not be used effectively for brake squeal tests.
［発明が解決しようとする問題点］
本発明は上記従来の課題に鑑みなされたもので
あり、その目的は、低制動力状態においても左右
制動トルク差を正確に測定してブレーキ鳴きその
他に対して有用なデータを与えることのできる改
良されたシヤーシダイナモを提供することにあ
る。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to accurately measure the left and right braking torque difference even in a low braking force state to prevent brake squeal and other problems. The object of the present invention is to provide an improved chassis dynamo that can provide useful data.
［問題点を解決するための手段］
上記目的を達成するために、本発明は、従来に
おいて各ローラにそれぞれ別個に設けられていた
軸トルク計をローラ対の間に設け、これによつて
左右の制動力の差を直接軸トルク計にて計測可能
とし、各部における測定誤差の累積のない高精度
のトルク測定を可能とし、これによつて微小制動
力差をも高精度で計測して各種の特性解析に有用
なデータを与え得ることを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a shaft torque meter between a pair of rollers, which was conventionally provided separately for each roller, and thereby It is possible to directly measure the difference in braking force with a shaft torque meter, making it possible to measure torque with high precision without accumulating measurement errors in each part. It is characterized by being able to provide useful data for characteristic analysis.
［実施例］
以下図面に基づいて本発明の好適な実施例を説
明する。[Embodiments] Preferred embodiments of the present invention will be described below based on the drawings.
第１図には本発明に係るシヤーシダイナモの概
略的な構成が示されており、第１図の従来装置と
同一部材には同一符号を付して説明を省略する。 FIG. 1 shows a schematic configuration of a chassis dynamo according to the present invention, and the same members as those of the conventional device shown in FIG.
本発明において特徴的なことは、一対のローラ
１０，１２の間に軸トルク計２６が設けられ、両
車輪の制動力差を直接軸トルク計２６によつて計
測できることにある。 A feature of the present invention is that an axial torque meter 26 is provided between the pair of rollers 10 and 12, and the difference in braking force between both wheels can be directly measured by the axial torque meter 26.
前記軸トルク計２６の計測値はストレンアンプ
２８によつて電気的な増幅処理が施された後表示
器３０に供給され、左右車輪の制動力差を直接表
示値として読取ることができる。 The measured value of the shaft torque meter 26 is electrically amplified by the strain amplifier 28 and then supplied to the display 30, so that the difference in braking force between the left and right wheels can be directly read as a displayed value.
従つて、低制動力領域においても、誤差成分の
少ない高精度の制動力差を計測可能であり、これ
によつて、ブレーキ鳴き等の現象を精密に分析評
価することが可能となる。 Therefore, even in the low braking force region, it is possible to measure the braking force difference with high accuracy with few error components, thereby making it possible to precisely analyze and evaluate phenomena such as brake squeal.
前述したブレーキ鳴き試験その他において左右
制動力の差は軸トルク計２６により精密に測定可
能であるが、もちろんこのような制動力差ばかり
でなく低制動力領域での両車輪の全制動力値も必
要であり、本発明においては、このような全制動
力を求めるためにフライホイールの慣性量と減速
度との演算が行われ、実施例においては制動力演
算器３２が設けられている。 In the aforementioned brake squeal test and other tests, the difference between the left and right braking forces can be precisely measured using the shaft torque meter 26, but of course it is possible to measure not only this braking force difference but also the total braking force value of both wheels in the low braking force region. This is necessary, and in the present invention, the inertia and deceleration of the flywheel are calculated in order to obtain such a total braking force, and in the embodiment, a braking force calculator 32 is provided.
制動力演算器３２は乗算器３４を含み、前記フ
ライホイールの慣性量と減速度とが乗算される。 The braking force calculator 32 includes a multiplier 34, and the inertia of the flywheel is multiplied by the deceleration.
フライホイールの慣性量はシヤーシダイナモに
固有の値として既知であり、本実施例においては
慣性量設定器３６からインプツトされて前記乗算
器３４に供給されている。 The amount of inertia of the flywheel is known as a value specific to the chassis dynamo, and in this embodiment, it is inputted from an inertia amount setter 36 and supplied to the multiplier 34.
また、減速度は一方の動力計１８の回転数から
求められ、動力計１８の近傍に配置されたパルス
ピツクアツプ３８の出力パルスを微分器４０によ
つて微分して減速度信号とし、これを乗算器３４
に供給する。従つて、乗算器３４は設定器３６及
び微分器４０の両出力を乗算して全制動力値を求
め、これを表示器４２に表示することができる。 Further, the deceleration is determined from the rotational speed of one of the dynamometers 18, and the output pulse of the pulse pickup 38 placed near the dynamometer 18 is differentiated by a differentiator 40 to obtain a deceleration signal, which is then multiplied. Vessel 34
supply to. Therefore, the multiplier 34 can multiply the outputs of the setter 36 and the differentiator 40 to obtain a total braking force value, which can be displayed on the display 42.
従つて、検査者は両表示器３０，４２の表示値
から左右制動力差及び全制動力を正確に知ること
ができ、これらを観察しながらブレーキ鳴き等の
精密な分析評価を行うことが可能となる。 Therefore, the inspector can accurately know the left and right braking force difference and the total braking force from the displayed values on both indicators 30 and 42, and can conduct precise analysis and evaluation of brake squeal and the like while observing these. becomes.
もちろん、両表示値は計測データとしてコンピ
ユータその他に入力し、コンピユータ内部におい
て分析を行うことも可能である。 Of course, both displayed values can be input to a computer or other device as measurement data and analyzed within the computer.
前述したフライホイールの慣性量は既知の値と
して設定器３６から演算器３２へインプツトされ
ているが、本発明において、フライホイール１
４，１６の各々の入り切りの状態を、図示してい
ないが周知の、リミツトスイツチ等で検出しこれ
らの検出値を制動力演算器３２へ供給することも
可能である。 The amount of inertia of the flywheel described above is input as a known value from the setter 36 to the calculator 32, but in the present invention, the amount of inertia of the flywheel 1 is inputted as a known value.
It is also possible to detect the on/off state of each of brakes 4 and 16 using a well-known limit switch or the like (not shown) and supply these detected values to the braking force calculator 32.
本発明のシヤーシダイナモを用いて実際の計測
を行う場合、各表示値は装置の機械的な損失を含
み、このような損失を除去した補正を行うため
に、惰行法を用いることが有益である。すなわ
ち、制動力差の測定においては、シヤーシダイナ
モの暖機完了後被検車両をローラ１０，１２上に
セツトする前に惰行させ各々の速度における機械
的損失の左右差を求め、これを補正値として求め
ることによつて機械的損失を除去した計測値を得
ることが可能となる。 When performing actual measurements using the chassis dynamometer of the present invention, each displayed value includes mechanical losses of the device, and it is useful to use the coasting method to perform corrections that remove such losses. be. That is, in measuring the difference in braking force, after the chassis dynamo has been warmed up, the test vehicle is coasted before being set on the rollers 10 and 12, and the left-right difference in mechanical loss at each speed is determined, and this is corrected. By determining this as a value, it is possible to obtain a measured value from which mechanical loss has been removed.
また、全制動力測定においても、予め惰行法に
より各々の車速でのシヤーシダイナモの摩擦損失
を求め、これによつて全制動力の補正を行うこと
が好適である。 Furthermore, in measuring the total braking force, it is preferable to determine the friction loss of the chassis dynamo at each vehicle speed in advance using the coasting method and correct the total braking force based on this.
本発明によれば、左右制動力差は両ローラ間に
設けられた１個の軸トルク計で行われ、また全制
動力の計測は少なくとも一方側のフライホイール
慣性量と減速度から求められるので、動力計自体
は一方のみに設け、他方をこれに相当するフライ
ホイールで代替することも可能である。 According to the present invention, the left and right braking force difference is measured by one shaft torque meter installed between both rollers, and the total braking force is measured from the flywheel inertia and deceleration of at least one side. It is also possible to provide the dynamometer itself only on one side and replace the other with a corresponding flywheel.
［発明の効果］
以上説明したように、本発明によれば、低制動
力領域においても高精度で左右制動力差を求める
ことができ、ブレーキ鳴き等の分析評価に極めて
有用な計測値を与えることができる。また、本発
明によれば、軸トルク計が１個となり、装置全体
のコストを低減させる効果を有し、また軸トルク
計はローラ間に配置されるため、シヤーシダイナ
モのの全幅を短くし、設置スペースを短縮できる
利点を有する。[Effects of the Invention] As explained above, according to the present invention, it is possible to determine the left and right braking force difference with high accuracy even in a low braking force region, and provides extremely useful measurement values for analysis and evaluation of brake squeal, etc. be able to. Further, according to the present invention, there is only one shaft torque meter, which has the effect of reducing the cost of the entire device, and since the shaft torque meter is placed between the rollers, the total width of the chassis dynamo can be shortened. , it has the advantage of shortening the installation space.
第１図は本発明に係るシヤーシダイナモの好適
な実施例を示す概略構成図、第２図は従来のシヤ
ーシダイナモを示す概略構成図である。
１０，１２……ローラ、１４，１６……フライ
ホイール、１８，２０……動力計、２６……軸ト
ルク計、３２……制動力演算器。
FIG. 1 is a schematic diagram showing a preferred embodiment of a chassis dynamo according to the present invention, and FIG. 2 is a schematic diagram showing a conventional chassis dynamo. 10, 12... roller, 14, 16... flywheel, 18, 20... dynamometer, 26... shaft torque meter, 32... braking force calculator.
Claims (1)
のローラと、これ等各ローラにそれぞれ接続され
車両重量と等価の慣性量をシミユレートするフラ
イホイールとフライホイールに接続され動力計測
を行う動力計とを含むシヤーシダイナモにおい
て、少なくとも一方の動力計に接続されてフライ
ホイールの慣性量と減速度から両車輪の全制動力
を計測する制動力演算器と、前記一対のローラ間
に設けられ左右車輪の制動力差を直接計測できる
軸トルク計とを含み、低制動力状態での左右制動
力の差を正確に測定できることを特徴とするシヤ
ーシダイナモ。1 A pair of rollers provided corresponding to the left and right wheels of the test vehicle, a flywheel connected to each of these rollers to simulate an amount of inertia equivalent to the vehicle weight, and a power source connected to the flywheel to measure the power. a brake force calculator connected to at least one of the dynamometers to measure the total braking force of both wheels from the inertia and deceleration of the flywheel; and a brake force calculator provided between the pair of rollers. This chassis dynamo is characterized by including a shaft torque meter that can directly measure the difference in braking force between the left and right wheels, and is capable of accurately measuring the difference in braking force between the left and right wheels in a low braking force state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59175576A JPS6151538A (en) | 1984-08-22 | 1984-08-22 | Chassis dynamo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59175576A JPS6151538A (en) | 1984-08-22 | 1984-08-22 | Chassis dynamo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6151538A JPS6151538A (en) | 1986-03-14 |
| JPH0214652B2 true JPH0214652B2 (en) | 1990-04-09 |
Family
ID=15998495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59175576A Granted JPS6151538A (en) | 1984-08-22 | 1984-08-22 | Chassis dynamo |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6151538A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0745140B2 (en) * | 1988-06-07 | 1995-05-17 | 松下電器産業株式会社 | Lens array manufacturing method |
| JP2736974B2 (en) * | 1988-07-08 | 1998-04-08 | 本田技研工業株式会社 | Automotive test equipment |
-
1984
- 1984-08-22 JP JP59175576A patent/JPS6151538A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6151538A (en) | 1986-03-14 |
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