JPH0678968B2 - Vehicle turning test method - Google Patents
Vehicle turning test methodInfo
- Publication number
- JPH0678968B2 JPH0678968B2 JP1138749A JP13874989A JPH0678968B2 JP H0678968 B2 JPH0678968 B2 JP H0678968B2 JP 1138749 A JP1138749 A JP 1138749A JP 13874989 A JP13874989 A JP 13874989A JP H0678968 B2 JPH0678968 B2 JP H0678968B2
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- turning
- wheel
- speed
- turning radius
- set value
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- Arrangement And Driving Of Transmission Devices (AREA)
Description
【発明の詳細な説明】 A.産業上の利用分野 本発明は、シャーシダイナモメータにおける自動車の試
験方法に係わり、特に旋回試験を行う方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for testing an automobile in a chassis dynamometer, and more particularly to a method for performing a turning test.
B.発明の概要 本発明は、旋回半径の設定値と旋回速度の設定値に基づ
いて、自動車の各車輪の駆動速度を求め、この駆動速度
に基づいて、シャーシダイナモメータにおける各車輪の
駆動速度を制御する自動車の旋回試験方法において、旋
回半径の設定値と車両諸元に基づいて、各車輪の旋回半
径を求め、旋回半径の設定値に対する各車輪の旋回半径
の比率を求め、この比率を旋回速度に乗算することによ
り各車輪の駆動速度を求め、これによって旋回試験を行
えるようにしたものである。B. Summary of the Invention The present invention determines the drive speed of each wheel of an automobile based on the set value of the turning radius and the set value of the turning speed, and based on this drive speed, the drive speed of each wheel in the chassis dynamometer. In the turning test method for automobiles that controls, the turning radius of each wheel is calculated based on the set value of the turning radius and the vehicle specifications, and the ratio of the turning radius of each wheel to the set value of the turning radius is calculated. The driving speed of each wheel is obtained by multiplying the turning speed so that the turning test can be performed.
さらに各車輪の駆動速度の偏差を求め、この偏差に基づ
いて各車輪の駆動速度を修正することにより、螺旋旋回
試験や８の字旋回試験を行えるようにしたものである。Further, the deviation of the driving speed of each wheel is obtained, and the driving speed of each wheel is corrected based on this deviation so that the spiral turning test and the figure 8 turning test can be performed.
C.従来の技術 一般に、自動車の製造・検査工程において、完成車のテ
スト項目に車の旋回テストが定められている。C. Conventional technology Generally, in the manufacturing and inspection process of automobiles, the turning test of the vehicle is specified as the test item of the completed vehicle.
従来は、試験員が試験対象の車に乗車し、テスト場にお
いて旋回半径・旋回速度を変化しながら、旋回テストを
繰り返し、データを収集していた。Conventionally, a tester rides on a vehicle to be tested, and changes a turning radius and a turning speed at a test site, repeats a turning test, and collects data.
D.発明が解決しようとする課題 上記の従来の旋回テストでは、次のような問題点があっ
た。D. Problems to be Solved by the Invention The conventional swing test described above has the following problems.
（１）旋回半径は、車両のホイールベース、トレッドの
諸元データとステヤリングの操舵角によって決まる。し
たがって車両の種類によって、同じ操舵角でも旋回半径
が同じにはならないために、旋回半径を指定された場
合、諸元データより操舵角を求めなければならない。(1) The turning radius is determined by the vehicle wheel base, tread specification data, and steering wheel steering angle. Therefore, depending on the type of vehicle, the turning radius does not become the same even if the turning angle is the same. Therefore, when the turning radius is designated, the steering angle must be obtained from the specification data.
（２）自動車を運転するためのマンパワーが必要であ
り、また運転車の安全性を考慮するための制約が生じ
る。(2) Manpower is required to drive a vehicle, and there are restrictions for considering the safety of the driving vehicle.
（３）屋外テストの場合、タイヤのスリップ騒音が出る
ため、その対策が必要なる。(3) In the case of an outdoor test, tire slip noise will be generated, so countermeasures are required.
本発明は、このような問題点に鑑みてなされたものであ
り、その目的とするところは、シャーシダイナモメータ
を使用して旋回試験を行える試験方法を提供する点にあ
る。The present invention has been made in view of such problems, and an object of the present invention is to provide a test method capable of performing a turning test using a chassis dynamometer.
E.課題を解決するための手段 本発明は、上記の目的を達成するために、旋回半径の設
定値と旋回速度の設定値に基づいて、自動車の各車輪の
駆動速度を求め、この駆動速度に基づいて、シャーシダ
イナモメータにおける各車輪の駆動速度を制御する自動
車の旋回試験方法において、次の手段を講じたものであ
る。E. Means for Solving the Problem In order to achieve the above object, the present invention obtains the driving speed of each wheel of an automobile based on the set value of the turning radius and the set value of the turning speed, and the driving speed Based on the above, in the vehicle turning test method for controlling the driving speed of each wheel in the chassis dynamometer, the following means are taken.
旋回半径の設定値と車両諸元に基づいて、各車輪の
旋回半径を求めること。Determine the turning radius of each wheel based on the set value of the turning radius and the vehicle specifications.
で求めた各車輪の旋回半径の、旋回半径の設定値
に対する比率を求めること。Calculate the ratio of the turning radius of each wheel obtained in step 1 to the set value of the turning radius.
で求めた比率を旋回速度に乗算することにより各
車輪の駆動速度を求めること。To obtain the driving speed of each wheel by multiplying the turning speed by the ratio obtained in.
また本発明では、上記〜の手段に加えて、次の手段
を付加することにより、螺旋旋回試験を行うこともでき
る。Further, in the present invention, the spiral turning test can be performed by adding the following means in addition to the above-mentioned means.
で求めた各車輪の駆動速度の偏差を求めること。 Obtain the deviation of the driving speed of each wheel obtained in.
で求めた偏差が徐々に小さくなるように各車輪の
駆動速度を修正すること。Correct the drive speed of each wheel so that the deviation obtained in step 2 becomes gradually smaller.
さらに本発明では、上記〜の手段に加えて、次の手
段を付加することにより、８の字旋回試験を行うことも
できる。Further, in the present invention, the figure-8 turning test can be performed by adding the following means in addition to the above-mentioned means.
で求めた偏差が左右の車輪について所定のタイミ
ングで反転するように各車輪の駆動速度を修正するこ
と。The driving speed of each wheel should be corrected so that the deviation obtained in step 1 is reversed at the predetermined timing for the left and right wheels.
少なくとも、の修正の際には、各車輪の駆動速度
の変化量を抑えること。At least when modifying, reduce the amount of change in the drive speed of each wheel.
F.作用 本発明に係る試験方法によれば、与えられた旋回半径の
設定値と車両諸元に基づいて、自動車が旋回するときの
各車輪の旋回半径を求め、旋回半径の設定値に対する各
車輪の旋回半径の比率を求める。さらにこの比率と旋回
速度の設定値に基づいて、各車輪の駆動速度を求めるこ
とができる。F. Action According to the test method according to the present invention, the turning radius of each wheel when the automobile turns based on the given set value of the turning radius and the vehicle specifications is obtained, and the turning radius is set for each set value. Find the ratio of the wheel turning radii. Further, the drive speed of each wheel can be obtained based on this ratio and the set value of the turning speed.
そしてシャーシダイナモメータにおいて、求めた駆動速
度に基づいて各車輪を制御することにより、旋回等価状
態を自動車に与え、旋回試験を行うことができる。Then, in the chassis dynamometer, by controlling each wheel on the basis of the determined driving speed, a turning equivalent state can be given to the vehicle and a turning test can be performed.
また求めた各車輪の駆動速度の偏差を求め、この偏差に
基づいて各車輪の駆動速度を修正していくことにより、
定常円旋回の他、螺旋旋回や８の字旋回など各種の旋回
等価状態を自動車に与えることが可能となる。Also, by obtaining the deviation of the driving speed of each wheel obtained, and by correcting the driving speed of each wheel based on this deviation,
In addition to the steady circular turning, various turning equivalent states such as a spiral turning and a figure eight turning can be given to the vehicle.
G.実施例 以下、図面を用いて、本発明の実施例を説明する。G. Examples Examples of the present invention will be described below with reference to the drawings.
第１図は、本発明の一実施例に係る試験装置を示す。FIG. 1 shows a test apparatus according to an embodiment of the present invention.
１−１〜１−４はローラであり、このローラ１−１〜１
−４上において、試験対象である自動車を駆動するもの
である。各ローラ１−１〜１−４には、ダイナモメータ
２−１〜２−４が取り付けられている。1-1 to 1-4 are rollers, and the rollers 1-1 to 1
-4 is to drive the vehicle under test. A dynamometer 2-1 to 2-4 is attached to each of the rollers 1-1 to 1-4.
このダイナモメータ２−１〜２−４の制御系は、コンピ
ュータ３、差動制御ユニット４、走行抵抗発生器５およ
び制御回路６からなる。The control system of the dynamometers 2-1 to 2-4 includes a computer 3, a differential control unit 4, a running resistance generator 5 and a control circuit 6.
コンピュータ３は、この試験装置を統御するものであ
る。このコンピュータ３は、中央処理装置（CPU）301、
メモリ302、表示装置（CRT）303、キーボード（KB）30
4、入出力インタフェース305、アナログ入力ポート（A/
I）306およびアナログ出力ポート（A/O）307などを有す
る。The computer 3 controls this test apparatus. The computer 3 includes a central processing unit (CPU) 301,
Memory 302, display device (CRT) 303, keyboard (KB) 30
4, input / output interface 305, analog input port (A /
It has an I) 306 and an analog output port (A / O) 307.
差動制御ユニット４は、コンピュータ３からの速度指示
値に基づいて速度制御（ASR制御）を行うものである。The differential control unit 4 performs speed control (ASR control) based on the speed instruction value from the computer 3.
走行抵抗発生器５は、検出速度から走行抵抗を求めるも
のである。本実施例では、走行抵抗発生器５は、コンピ
ュータ３とアクセスし、コンピュータ３のメモリ302に
格納された速度・走行抵抗関数に基づいて、検出速度に
対応する走行抵抗を読み出す構成となっている。The running resistance generator 5 determines running resistance from the detected speed. In this embodiment, the running resistance generator 5 accesses the computer 3 and reads the running resistance corresponding to the detected speed based on the speed / running resistance function stored in the memory 302 of the computer 3. .
制御回路６は、差動制御ユニット４および走行抵抗発生
器５からの指示値に基づいて、ダイナモメータ２−１〜
２−４の走行抵抗制御（ALR制御）を行うものである。The control circuit 6 is based on the instruction values from the differential control unit 4 and the running resistance generator 5, and the dynamometers 2-1 to 2-1.
2-4 is used for running resistance control (ALR control).
この試験装置の動作を説明する。The operation of this test apparatus will be described.
まず、定常円旋回の等価試験における制御原理を説明す
る。First, the control principle in the equivalent test of steady circular turning will be described.
第２図は、自動車の定常円旋回の様子を示す。FIG. 2 shows a situation in which a vehicle makes a steady circular turn.
この定常円の円周上を車速Ｖで旋回する状態と等価な条
件を満たすように、ダイナモメータが動作される。The dynamometer is operated so as to satisfy the condition equivalent to the state of turning at the vehicle speed V on the circumference of this steady circle.
対象ベンチは４輪駆動とし、旋回半径Ｒと旋回速度Ｖを
変化しながら、試験を行う。この旋回半径Ｒと旋回速度
Ｖは、キーボード304のダイヤル式数値入力部により設
定される。The target bench is a four-wheel drive, and the test is performed while changing the turning radius R and the turning speed V. The turning radius R and the turning speed V are set by the dial type numerical value input section of the keyboard 304.
旋回半径Ｒと旋回速度Ｖの設定範囲は次の通りである。The setting ranges of the turning radius R and the turning speed V are as follows.
R:4〜50m V:4〜50Km/h 第３図は、自動車の各車輪の旋回半径の関係を示す。R: 4 to 50m V: 4 to 50Km / h Fig. 3 shows the relationship between the turning radii of each wheel of the automobile.
コンピュータ３には、試験対象である自動車の車両諸元
（車両のホイールベース寸法Ｌとトレッド寸法Ｗ）があ
らかじめ入力される。ここで旋回半径Ｒは、最外輪が描
く円弧の半径とする。この場合、前右の車輪の旋回半径
がこれに相当する。また前右、前左、後右、後左の車輪
はそれぞれダイナモメータ２−１〜２−４に対応するも
のとする。Vehicle specifications (wheelbase dimension L and tread dimension W of the vehicle) of the automobile to be tested are input to the computer 3 in advance. Here, the turning radius R is the radius of the arc drawn by the outermost wheel. In this case, the turning radius of the front right wheel corresponds to this. The front right, front left, rear right, and rear left wheels correspond to the dynamometers 2-1 to 2-4, respectively.
このとき前右、前左、後右、後左の車輪の旋回半径R1〜
R4は次のようになる。At this time, the turning radius of the front right, front left, rear right, rear left wheels R 1 ~
R 4 is
これらの旋回半径R1〜R4の平均値に対する各半径の比率
R1′〜R4′は次のようになる。 Ratio of each radius to the average value of these turning radii R 1 to R 4
R 1 ′ to R 4 ′ are as follows.
前右、前左、後右、後左の車輪の旋回速度V1〜V4（Km/
h）は、それぞれの旋回半径R1〜R4に比例するので、こ
の比率R1′〜R4′を自動車の旋回速度Ｖに乗ずれば、各
車輪の旋回速度V1〜V4が求まる。 Turning speed of front right, front left, rear right, rear left wheels V 1 to V 4 (Km /
Since h) is proportional to the respective turning radii R 1 to R 4 , the turning speeds V 1 to V 4 of the wheels can be obtained by multiplying the turning speed V of the vehicle by this ratio R 1 ′ to R 4 ′. .
V1＝Ｖ×R1′ ……（９） V2＝Ｖ×R2′ ……（10） V3＝Ｖ×R3′ ……（11） V4＝Ｖ×R4′ ……（12） また、舵取角度α，βは次のようになる。V 1 = V × R 1 ′ (9) V 2 = V × R 2 ′ (10) V 3 = V × R 3 ′ (11) V 4 = V × R 4 ′ (( 12) The steering angles α and β are as follows.
本試験装置の動作原理は、このようにして求めた各車輪
の旋回速度V1〜V4に基づいて、ダイナモメータ２−１〜
２−４を制御するものである。 The operating principle of this test device is that the dynamometers 2-1 to 2-1 are based on the turning speeds V 1 to V 4 of the wheels thus obtained.
2-4 is controlled.
実際は、コンピュータ３から差動制御ユニット４に出力
されるデータは、前後の差動回転速度ΔFRと、前輪にお
ける左右の差動回転速度ΔFLRと、後輪における左右の
差動回転速度ΔRLRである。これらは次のように表され
る。Actually, the data output from the computer 3 to the differential control unit 4 are the front and rear differential rotation speeds ΔFR, the left and right differential rotation speeds ΔFLR of the front wheels, and the left and right differential rotation speeds ΔRLR of the rear wheels. These are represented as follows.
ΔFR＝1/2（R1′＋R2′−R3′−R4′）×Ｖ ……（15） ΔFLR＝（−R1′＋R2′）×Ｖ ……（16） ΔRLR＝（−R3′＋R4′）×Ｖ ……（17） これらのデータに基づいて、差動制御ユニット４および
制御回路５によりダイナモメータ２−１〜２−４を駆動
することによって、定常円旋回走行の等価試験を行うこ
とができる。ΔFR = 1/2 (R 1 ′ + R 2 ′ −R 3 ′ −R 4 ′) × V …… (15) ΔFLR = (− R 1 ′ + R 2 ′) × V …… (16) ΔRLR = (− R 3 ′ + R 4 ′) × V (17) Based on these data, by driving the dynamometers 2-1 to 2-4 by the differential control unit 4 and the control circuit 5, steady circle turning traveling is performed. The equivalent test of can be performed.
具体例として、ホイールベース寸法Ｌを2.600（ｍ）、
トレッド寸法Ｗを1.475（ｍ）、旋回半径Ｒを5.3（ｍ）
とする。As a specific example, the wheel base dimension L is 2.600 (m),
Tread size W is 1.475 (m) and turning radius R is 5.3 (m)
And
この場合、各車輪の旋回速度V1〜V4は5.30,4.08,4.62,
3.15（ｍ）となり、速度比率V1′〜V4′は1.236,0.952,
1.078,0.735（Km/h）となり、ΔFR,ΔFLR,ΔRLRは0.188
×V,−0.284×V,−0.343×Ｖ（Km/h）となる。また舵取
角度α，βは39.5,29.4（deg）となる。In this case, the turning speeds V 1 to V 4 of the wheels are 5.30, 4.08, 4.62,
3.15 (m), the speed ratio V 1 ′ ~ V 4 ′ is 1.236, 0.952,
1.078, 0.735 (Km / h), ΔFR, ΔFLR, ΔRLR is 0.188
× V, −0.284 × V, −0.343 × V (Km / h). The steering angles α and β are 39.5 and 29.4 (deg).
次に、螺旋旋回の等価試験における制御原理を説明す
る。Next, the control principle in the equivalent test of spiral turning will be described.
第４図は、自動車の螺旋旋回の様子を示す。FIG. 4 shows how the automobile turns spirally.
この等価試験では、図に示すように螺旋状に車速Ｖで旋
回する状態と等価な条件を満たすように、ダイナモメー
タが動作される。In this equivalence test, the dynamometer is operated so as to satisfy a condition equivalent to a state of turning spirally at the vehicle speed V as shown in the figure.
この場合、自動車が走行するに従って旋回半径Ｒが大き
くなり、走行通路の曲率が小さくなっていく。In this case, the turning radius R increases as the vehicle travels, and the curvature of the travel passage decreases.
すなわち、走行するに従って各車輪の旋回速度V1〜V4の
速度差が徐々に小さくなっていく。That is, as the vehicle travels, the speed difference between the turning speeds V 1 to V 4 of the wheels gradually decreases.
本実施例では、差動制御ユニット４に対するデータΔF
R、ΔFLR、ΔRLRを所定の時定数により減少させること
により、螺旋旋回と等価な制御を行うものである。デー
タΔFR、ΔFLR、ΔRLRの経時変化を第５図に示す。In this embodiment, the data ΔF for the differential control unit 4
By reducing R, ΔFLR, and ΔRLR by a predetermined time constant, control equivalent to spiral turning is performed. FIG. 5 shows the time-dependent changes in the data ΔFR, ΔFLR, and ΔRLR.
次に、８の字旋回の等価試験における制御原理を説明す
る。Next, the control principle in the equivalent test of 8-shaped turning will be described.
第６図は、自動車の８の字旋回の様子を示す。FIG. 6 shows a state in which an automobile is turning into a figure 8.
この等価試験では、図中左の定常円を円１とし、右の円
を円２とすると、自動車は円１上の右回りの旋回と円２
上の左回りの旋回を繰り返すことになる。In this equivalence test, if the stationary circle on the left in the figure is circle 1 and the circle on the right is circle 2, the car will turn clockwise on circle 1 and circle 2.
The above counterclockwise turn will be repeated.
この場合、円１旋回時と円２旋回時では、前輪・後輪と
も左右の回転速度が逆になる。In this case, the left and right rotation speeds of the front wheels and the rear wheels are opposite when the vehicle makes one turn and when it makes two turns.
本実施例では、右回り旋回時の旋回半径を正、左回り旋
回時の旋回半径を負と定義する。これにより、差動制御
ユニット４に対するデータΔFLR、ΔRLRの符号を所定の
期間ごとに切り替えることができ、８の字旋回と等価な
制御を行うものである。In the present embodiment, the turning radius when turning clockwise is defined as positive, and the turning radius when turning counterclockwise is defined as negative. As a result, the signs of the data ΔFLR and ΔRLR for the differential control unit 4 can be switched every predetermined period, and control equivalent to that of a figure eight turn is performed.
第７図は、データΔFR、ΔFLR、ΔRLRの経時変化を示
す。図に示すように、円１旋回期間、円２旋回期間が一
定周期で切り替わる。円１旋回期間では、ΔFLR,ΔRLR
は共に＋であり、円２旋回期間では、ΔFLR,ΔRLRは共
に−となる。FIG. 7 shows the time-dependent changes in the data ΔFR, ΔFLR, and ΔRLR. As shown in the figure, the circle 1 turn period and the circle 2 turn period are switched at a constant cycle. ΔFLR, ΔRLR in one circle turning period
Are both +, and both ΔFLR and ΔRLR are − during the two circles turning period.
また、この場合、第８図に示すように、差動制御ユニッ
ト４の前段に、ΔFLR,ΔRLRの変化率のしきい値以下に
制限する変化率制限器７を設ける態様が好ましい。この
態様によれば、ΔFLR,ΔRLRの急激な変化を回避でき、
ダイナモメータの制御を安定化できる利点がある。Further, in this case, as shown in FIG. 8, it is preferable that a change rate limiter 7 that limits the change rate of ΔFLR and ΔRLR to be equal to or less than a threshold value is provided in the preceding stage of the differential control unit 4. According to this aspect, it is possible to avoid a sudden change in ΔFLR, ΔRLR,
There is an advantage that the control of the dynamometer can be stabilized.
H.発明の効果 以上説明したように、本発明に係る試験方法によれば、
与えられた旋回半径の設定値と車両諸元に基づいて、自
動車が旋回するときの各車輪の駆動速度を求めることが
できる。そしてシャーシダイナモメータにおいて、求め
た駆動速度に基づいて各車輪を制御することにより、旋
回等価状態を自動車に与え、旋回試験を行うことができ
る。H. Effect of the Invention As described above, according to the test method of the present invention,
The driving speed of each wheel when the automobile turns can be obtained based on the given set value of the turning radius and the specifications of the vehicle. Then, in the chassis dynamometer, by controlling each wheel on the basis of the determined driving speed, a turning equivalent state can be given to the vehicle and a turning test can be performed.
また求めた各車輪の駆動速度の偏差を求め、この偏差に
基づいて各車輪の駆動速度を修正していくことにより、
定常円旋回の他、螺旋旋回や８の字旋回など各種の旋回
等価状態を自動車に与えることもできる。Also, by obtaining the deviation of the driving speed of each wheel obtained, and by correcting the driving speed of each wheel based on this deviation,
In addition to the steady circular turn, various turning equivalent states such as a spiral turn and a figure eight turn can be given to the vehicle.
各車輪の駆動速度を求めるにあたって、旋回半径や旋回
速度のみでなく、車両諸元をも考慮して演算を行えるの
で、指定条件に忠実な旋回試験を簡単に実施できる利点
がある。When calculating the driving speed of each wheel, not only the turning radius and the turning speed but also the vehicle specifications can be taken into consideration for the calculation, so that there is an advantage that the turning test faithful to the specified condition can be easily performed.
またシャーシダイナモメータによる等価試験であるの
で、マンパワーを省略することが可能であり、試験の安
全性が向上する利点がある。Further, since the equivalence test is performed by the chassis dynamometer, manpower can be omitted, and there is an advantage that the safety of the test is improved.
さらに屋内テストにより実施可能であるので、タイヤの
スリップ騒音などへの対策が容易となる利点がある。Further, since it can be carried out by an indoor test, there is an advantage that it is easy to take measures against tire slip noise and the like.
さらに８の字旋回試験を行う場合、各車輪の駆動速度を
修正する際の急激な変化を抑えることにより、シャーシ
ダイナモメータの制御を安定化することができる利点が
ある。Further, when performing an 8-shaped turning test, there is an advantage that the control of the chassis dynamometer can be stabilized by suppressing a rapid change when correcting the drive speed of each wheel.
第１図は本発明の一実施例に係る試験装置を示すブロッ
ク図、第２図は自動車の定常円旋回を示す説明図、第３
図は定常円旋回における各車輪の旋回半径の関係を示す
説明図、第４図は自動車の螺旋旋回を示す説明図、第５
図は螺旋旋回試験におけるΔFR、ΔFLR、ΔRLRの経時変
化を示すタイムチャート、第６図は自動車の８の字旋回
を示す説明図、第７図はΔFR、ΔFLR、ΔRLRの経時変化
を示すタイムチャート、第８図は本発明の実施例に係る
試験装置の変形例を示すブロック図である。 １−１〜１−４……ローラ、２−１〜２−４……ダイナ
モメータ、３……コンピュータ、４……差動制御ユニッ
ト、５……走行抵抗発生器、６……制御回路、７……変
化率制限器。FIG. 1 is a block diagram showing a test apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view showing a steady circular turning of an automobile, and FIG.
FIG. 4 is an explanatory view showing the relationship between the turning radii of each wheel in a steady circular turn, FIG. 4 is an explanatory view showing a spiral turn of an automobile, and FIG.
Figure is a time chart showing changes over time in ΔFR, ΔFLR, and ΔRLR in a spiral turn test, Figure 6 is an explanatory diagram showing a figure eight turn of an automobile, and Figure 7 is a time chart showing changes over time in ΔFR, ΔFLR, and ΔRLR. FIG. 8 is a block diagram showing a modified example of the test apparatus according to the embodiment of the present invention. 1-1 to 1-4 ... Roller, 2-1 to 2-4 ... Dynamometer, 3 ... Computer, 4 ... Differential control unit, 5 ... Running resistance generator, 6 ... Control circuit, 7 ... Change rate limiter.
Claims (3)
づいて、自動車の各車輪の駆動速度を求め、この駆動速
度に基づいて、シャーシダイナモメータにおける各車輪
の駆動速度を制御する自動車の旋回試験方法において、 旋回半径の設定値と車両諸元に基づいて、各車輪の旋回
半径を求め、 旋回半径の設定値に対する各車輪の旋回半径の比率を求
め、 この比率を旋回速度に乗算することにより各車輪の駆動
速度を求めること を特徴とする自動車の旋回試験方法。1. A vehicle for determining a driving speed of each wheel of a vehicle based on a set value of a turning radius and a set value of a turning speed, and controlling the driving speed of each wheel in a chassis dynamometer based on the driving speed. In the turning test method, the turning radius of each wheel is calculated based on the set value of the turning radius and the vehicle specifications, the ratio of the turning radius of each wheel to the set value of the turning radius is calculated, and this ratio is multiplied by the turning speed. A turning test method for an automobile, characterized in that the driving speed of each wheel is obtained by performing the following.
づいて、自動車の各車輪の駆動速度を求め、この駆動速
度に基づいて、シャーシダイナモメータにおける各車輪
の駆動速度を制御する自動車の旋回試験方法において、 旋回半径の設定値と車両諸元に基づいて、各車輪の旋回
半径を求め、 旋回半径の設定値に対する各車輪の旋回半径の比率を求
め、 この比率を旋回速度に乗算することにより各車輪の駆動
速度を求め、 各車輪の駆動速度の偏差を求め、 この偏差が徐々に小さくなるように各車輪の駆動速度を
修正することにより、螺旋旋回試験を行うこと を特徴とする自動車の旋回試験方法。2. A vehicle in which the drive speed of each wheel of the vehicle is obtained based on the set value of the turning radius and the set value of the turning speed, and the drive speed of each wheel in the chassis dynamometer is controlled based on this drive speed. In the turning test method, the turning radius of each wheel is calculated based on the set value of the turning radius and the vehicle specifications, the ratio of the turning radius of each wheel to the set value of the turning radius is calculated, and this ratio is multiplied by the turning speed. By determining the drive speed of each wheel, the deviation of the drive speed of each wheel is obtained, and the spiral speed test is performed by correcting the drive speed of each wheel so that this deviation gradually becomes smaller. Test method for turning vehicles.
づいて、自動車の各車輪の駆動速度を求め、この駆動速
度に基づいて、シャーシダイナモメータにおける各車輪
の駆動速度を制御する自動車の旋回試験方法において、 旋回半径の設定値と車両諸元に基づいて、各車輪の旋回
半径を求め、 各車輪の旋回半径から舵取角度を求め、 旋回半径の設定値に対する各車輪の旋回半径の比率を求
め、 この比率を旋回速度に乗算することにより各車輪の駆動
速度を求め、 各車輪の駆動速度の偏差を求め、 この偏差が左右の車輪について所定のタイミングで反転
するように各車輪の駆動速度を修正することにより、８
の字旋回試験を行い、 少なくとも、この修正の際には、各車輪の駆動速度の変
化量を抑えること を特徴とする自動車の旋回試験方法。3. A vehicle in which the drive speed of each wheel of the vehicle is determined based on the set value of the turning radius and the set value of the turning speed, and the drive speed of each wheel in the chassis dynamometer is controlled based on this drive speed. In the turning test method, the turning radius of each wheel is calculated based on the set value of the turning radius and the vehicle specifications, the steering angle is calculated from the turning radius of each wheel, and the turning radius of each wheel with respect to the set value of the turning radius. The driving speed of each wheel is calculated by multiplying the turning speed by this ratio, and the deviation of the driving speed of each wheel is calculated.The deviation is reversed for the left and right wheels at a predetermined timing. By modifying the drive speed of
A turning test method for automobiles, which is characterized by performing a square turning test, and suppressing the amount of change in the drive speed of each wheel at least when making this correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1138749A JPH0678968B2 (en) | 1989-05-31 | 1989-05-31 | Vehicle turning test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1138749A JPH0678968B2 (en) | 1989-05-31 | 1989-05-31 | Vehicle turning test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH034135A JPH034135A (en) | 1991-01-10 |
| JPH0678968B2 true JPH0678968B2 (en) | 1994-10-05 |
Family
ID=15229284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1138749A Expired - Lifetime JPH0678968B2 (en) | 1989-05-31 | 1989-05-31 | Vehicle turning test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678968B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5074289B2 (en) * | 2008-05-12 | 2012-11-14 | 株式会社小野測器 | Chassis dynamometer |
| JP5467027B2 (en) * | 2010-11-05 | 2014-04-09 | 株式会社ブリヂストン | Tire wear test apparatus, method, and program |
| AT512863B1 (en) * | 2013-08-29 | 2015-02-15 | Avl List Gmbh | Method for simulating cornering |
-
1989
- 1989-05-31 JP JP1138749A patent/JPH0678968B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH034135A (en) | 1991-01-10 |
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