JPH0246891B2 - - Google Patents
Info
- Publication number
- JPH0246891B2 JPH0246891B2 JP59112131A JP11213184A JPH0246891B2 JP H0246891 B2 JPH0246891 B2 JP H0246891B2 JP 59112131 A JP59112131 A JP 59112131A JP 11213184 A JP11213184 A JP 11213184A JP H0246891 B2 JPH0246891 B2 JP H0246891B2
- Authority
- JP
- Japan
- Prior art keywords
- load
- wheel
- drive vehicle
- acceleration
- sharing ratio
- 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
- 230000001133 acceleration Effects 0.000 claims description 42
- 238000012360 testing method Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 7
- 238000011056 performance test Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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］
本発明は車両用のシヤシダイナモメータ、特に
四輪駆動車用シヤシダイナモメータの改良に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in chassis dynamometers for vehicles, particularly chassis dynamometers for four-wheel drive vehicles.
［背景技術］
従来より、自動車の各種走行性能試験、例えば
10モード試験等のパターン走行試験を行うシヤシ
ダイナモメータが周知であり、該シヤシダイナモ
メータは、例えば台上又はシヤシダイナモメータ
室に固定された供試自動車の駆動輪を、負荷特性
が任意に制御されるローラ上に当接し実走行に近
似した状態で供試自動車の各種試験を行つてい
る。[Background technology] Conventionally, various driving performance tests of automobiles, e.g.
Chassis dynamometers that perform pattern driving tests such as 10-mode tests are well known, and these chassis dynamometers test the drive wheels of a test vehicle, which is fixed on a bench or in a chassis dynamometer room, depending on the load characteristics. Various tests are conducted on test vehicles in a state that approximates actual driving by contacting arbitrarily controlled rollers.
そして、このようなシヤシダイナモメータを用
いた、四輪駆動車の走行性能試験は、該四輪駆動
車の駆動輪、すなわち前輪及び後輪をそれぞれ前
輪用ローラ及び後輪用ローラと当接し、これら各
ローラに車両の走行状態に応じた負荷を与えるこ
とにより行われる。 In a running performance test of a four-wheel drive vehicle using such a chassis dynamometer, the driving wheels of the four-wheel drive vehicle, that is, the front wheels and rear wheels, are brought into contact with the front wheel roller and the rear wheel roller, respectively. This is done by applying a load to each of these rollers according to the running condition of the vehicle.
ところで、このような四輪駆動車は、その前輪
と後輪の負荷分担比が異なり、従つてこのような
四輪駆動車用のシヤシダイナモメータにおいては
前後輪の負荷分担比に応じて前輪用ローラ及び後
輪用ローラの負荷特性を制御することが必要とな
る。 By the way, in such a four-wheel drive vehicle, the load sharing ratio between the front wheels and the rear wheels is different. Therefore, in a chassis dynamometer for such a four-wheel drive vehicle, the front wheels are It is necessary to control the load characteristics of the rear wheel rollers and the rear wheel rollers.
このため、従来の四輪駆動用シヤシダイナモメ
ータにおいては前輪用ローラ及び後輪ローラの負
荷分担比を常に車両の定速走行状態に合せてに制
御する分担比制御を行つている。 For this reason, conventional four-wheel drive chassis dynamometers perform load sharing ratio control in which the load sharing ratio of the front wheel rollers and the rear wheel rollers is always controlled in accordance with the constant speed running state of the vehicle.
しかし、このような分担比制御を用いた四輪駆
動車用シヤシダイナモメータは、四輪駆動車が定
速走行を行つている場合には忠実にその実走行状
態を再現し良好な試験結果を得ることができる
が、車両が所定の加速度をもつて加速又は減速さ
れている場合には車両の実走行状態を再現するこ
とはできず正確な試験結果を得ることができない
という欠点があつた。 However, chassis dynamometers for four-wheel-drive vehicles that use such sharing ratio control faithfully reproduce the actual driving conditions when the four-wheel-drive vehicle is traveling at a constant speed, giving good test results. However, if the vehicle is being accelerated or decelerated at a predetermined acceleration, the actual running state of the vehicle cannot be reproduced and accurate test results cannot be obtained.
すなわち、四輪駆動車の前輪及び後輪の負荷分
担比は、定速走行時においては常に一定である
が、車両が加速する場合には車体後方が沈込み後
輪の分担比が増加し、また減速時には車体前方が
沈込み前輪の負荷分担比が増加する。 In other words, the load sharing ratio between the front wheels and rear wheels of a four-wheel drive vehicle is always constant when driving at a constant speed, but when the vehicle accelerates, the rear of the vehicle sinks and the load sharing ratio of the rear wheels increases. Also, when decelerating, the front of the vehicle sinks, increasing the load sharing ratio of the front wheels.
しかし、従来の四輪駆動車用シヤシダイナモメ
ータにおいては、このような車両の加減速時にお
ける前輪及び後輪の負荷分担比の変動を再現する
ことができず、この結果加減速時における正確な
走行性能試験を行うことができないという欠点が
あつた。 However, conventional chassis dynamometers for four-wheel drive vehicles are unable to reproduce such fluctuations in the load sharing ratio of the front and rear wheels during acceleration and deceleration of the vehicle, and as a result, it is not possible to accurately reproduce the The drawback was that it was not possible to conduct thorough driving performance tests.
また、このような加減速時における実走行状態
を擬似するためにアーム等を用い車体の前方もし
くは後方を強制的に沈込み制御する方法も考えら
れるが、このような方法を用いたシヤシダイナモ
メータにおいては、アームにより車体の沈込み深
さが一律に固定されてしまい、例えば加速時もし
くは減速時に発生する車体の上下方向への振動を
擬似することができず、振動特性を考慮した正確
な走行性能試験を行うことができないという欠点
があつた。 Another possibility is to use an arm or the like to forcibly control the front or rear of the vehicle to sink in order to simulate the actual driving conditions during acceleration and deceleration, but the chassis dynamometer using such a method is In meters, the sink depth of the car body is uniformly fixed by the arm, and it is not possible to simulate the vertical vibration of the car body that occurs during acceleration or deceleration. The drawback was that it was not possible to conduct driving performance tests.
［発明の目的］
本発明は、このような従来の課題に鑑み為され
たものであり、その目的は、四輪駆動車の定速走
行時及び加減速走行時を正確に擬似し良好な走行
性能試験を行うことが可能な四輪駆動車用シヤシ
ダイナモメータを提供することにある。[Object of the Invention] The present invention has been made in view of such conventional problems, and its purpose is to accurately simulate the constant speed running and acceleration/deceleration running of a four-wheel drive vehicle to achieve good running. An object of the present invention is to provide a chassis dynamometer for a four-wheel drive vehicle that can perform performance tests.
［発明の構成］
前記目的を達成するため、本発明の四輪駆動車
用シヤシダイナモメータは、供試四輪駆動車の前
後駆動輪に当接し、該駆動輪に所定負荷を与えな
がら四輪駆動車を擬似走行させる前輪用ローラ及
び後輪用ローラと、該ローラ上を擬似走行する四
輪駆動車の走行速度に基づき四輪駆動車の実走行
時における全走行抵抗負荷を演算する負荷演算回
路と、四輪駆動車の加速度を検出する加速度検出
回路と、四輪駆動車の加速度に対応した負荷分担
比データが予め設定され前記検出加速度に基づき
前輪用ローラ及び後輪用ローラの負荷分担比を出
力する分担比設定回路と、前記全走行抵抗負荷及
び負荷分担比に基づき前輪用ローラ及び後輪用ロ
ーラの分担する分担抵抗負荷を演算出力する分担
抵抗設定回路と、を含み、該分担抵抗設定回路か
ら出力される分担抵抗負荷に基づき前輪用ローラ
及び後輪用ローラの負荷特性を制御し、実走行に
近似した状態で四輪駆動車の試験を行うことを特
徴とする。[Structure of the Invention] In order to achieve the above-mentioned object, the chassis dynamometer for a four-wheel drive vehicle of the present invention contacts the front and rear drive wheels of a test four-wheel drive vehicle and dynamometers the four-wheel drive vehicle while applying a predetermined load to the drive wheels. A load that calculates the total running resistance load during actual running of a four-wheel drive vehicle based on front wheel rollers and rear wheel rollers that make the wheel drive vehicle run in a simulated manner, and the running speed of the four-wheel drive vehicle that runs simulated on the rollers. An arithmetic circuit, an acceleration detection circuit that detects the acceleration of the four-wheel drive vehicle, and load sharing ratio data corresponding to the acceleration of the four-wheel drive vehicle are set in advance, and the load of the front wheel roller and the rear wheel roller is determined based on the detected acceleration. A sharing ratio setting circuit that outputs a sharing ratio, and a sharing resistance setting circuit that calculates and outputs a sharing resistance load to be shared by the front wheel roller and the rear wheel roller based on the total running resistance load and the load sharing ratio, It is characterized by controlling the load characteristics of the front wheel rollers and the rear wheel rollers based on the shared resistance load output from the shared resistance setting circuit, and testing the four-wheel drive vehicle under conditions similar to actual driving.
［実施例］
次に本発明の好適な実施例を図面に基づき説明
する。[Example] Next, a preferred example of the present invention will be described based on the drawings.
第１図には本発明に係る四輪駆動車用シヤシダ
イナモメータの好適な実施例が示されており、実
施例のシヤシダイナモメータは、動的な走行性能
試験を行う供試四輪駆動車の各駆動輪、すなわち
前輪及び後輪を当接載置する前輪用ローラ１０ａ
及び後輪用ローラ１０ｂと、これら各ローラ１０
ａ，１０ｂに直結され各ローラ１０ａ，１０ｂの
回転抵抗負荷を制御する直流発電機１２ａ，１２
ｂと、を含む。 FIG. 1 shows a preferred embodiment of the chassis dynamometer for four-wheel drive vehicles according to the present invention. A front wheel roller 10a on which each drive wheel of the drive vehicle, that is, the front wheel and the rear wheel, is placed in contact with each other.
and rear wheel roller 10b, and each of these rollers 10
DC generators 12a, 12 that are directly connected to rollers 10a, 10b and control the rotational resistance load of each roller 10a, 10b.
b.
そして、走行性能試験を行う供試四輪駆動車の
前輪及び後輪を対応する前輪用ローラ１０ａ、後
輪用ローラ１０ｂ上に当接載置し、該四輪駆動車
を駆動輪の回転により移動することないよう所定
の固定手段により固定し、ローラ１０ａ，１０ｂ
上で擬似走行させる。これにより、回転する各ロ
ーラ１０ａ，１０ｂを実際の路面にかえ無限端平
坦路として機能させ、四輪駆動車の動的な走行性
能試験を実際の走行路と同一の条件の下で行うも
のである。 Then, the front wheels and rear wheels of the test four-wheel drive vehicle to be tested for running performance are placed in contact with the corresponding front wheel rollers 10a and rear wheel rollers 10b, and the four-wheel drive vehicle is rotated by rotation of the drive wheels. The rollers 10a and 10b are fixed by a predetermined fixing means so that they do not move.
Make a simulated run on the top. As a result, each of the rotating rollers 10a and 10b is used as an actual road surface to function as an infinite flat road, and a dynamic driving performance test of a four-wheel drive vehicle is conducted under the same conditions as an actual road. be.
ここにおいて、実走行に近似した擬似走行状態
は、四輪駆動車の実際の走行時において前輪及び
後輪に加わる抵抗負荷と等しい抵抗負荷を直流発
電機１２ａ，１２ｂにより前輪用ローラ１０ａ及
び後輪用ローラ１０ｂに印加することにより形成
される。 Here, in a pseudo driving state that approximates actual driving, a resistance load equal to the resistance load applied to the front wheels and rear wheels during actual driving of a four-wheel drive vehicle is applied to the front wheel roller 10a and the rear wheels using DC generators 12a and 12b. It is formed by applying a voltage to the roller 10b.
このような抵抗負荷制御を行うため、実施例の
装置においては、回転数検出器１３により直流モ
ータ１２ａの回転数を検出し、速度検出器１４に
より該検出回転数に基づきローラ１０ａ，１０ｂ
上における車両の走行速度を検出している。 In order to perform such resistance load control, in the apparatus of the embodiment, the rotation speed detector 13 detects the rotation speed of the DC motor 12a, and the speed detector 14 detects the rotation speed of the rollers 10a, 10b based on the detected rotation speed.
The traveling speed of the vehicle above is detected.
そして、このようにして検出された走行速度
は、負荷演算回路１６に供給され、この負荷演算
回路１６により当該走行速度において車両の前輪
及び後輪に加わる全走行抵抗負荷LOを演算する。 The travel speed thus detected is supplied to the load calculation circuit 16, which calculates the total travel resistance load L O applied to the front wheels and rear wheels of the vehicle at the travel speed.
実施例において、この負荷演算回路１６は、ロ
ードロード設定器１８とエレクトリツクフライホ
イール２０とを含む。そして、ロードロード設定
器１８は、車両用の走行速度に基づき、車両用が
該検出速度で定速走行した際の抵抗負荷を求め
る。また、エレクトリツクフライホイール２０
は、前記検出速度を微分し車両の加速度を演算
し、該加速度時における慣性抵抗負荷を求める。
そして、このようにして求めた定速走行抵抗負荷
及び慣性抵抗負荷を加算器２２により加算し全走
行抵抗負荷L0として出力している。このように
して出力されるL0は、四輪駆動車の現在の速度
及び加速度の下において、各駆動輪すなわち前輪
及び後輪に加わる全走行抵抗負荷を示すものとな
る。 In the embodiment, the load calculating circuit 16 includes a load setting device 18 and an electric flywheel 20. Then, the load setting device 18 determines the resistance load when the vehicle is traveling at a constant speed at the detected speed based on the vehicle traveling speed. In addition, electric flywheel 20
calculates the acceleration of the vehicle by differentiating the detected speed, and determines the inertial resistance load at the time of the acceleration.
Then, the constant speed running resistance load and the inertial resistance load obtained in this manner are added by an adder 22 and output as the total running resistance load L 0 . The output L 0 in this manner indicates the total running resistance load applied to each drive wheel, that is, the front wheel and the rear wheel, under the current speed and acceleration of the four-wheel drive vehicle.
ところで四輪駆動車の前及び後輪によるこのよ
うな全走行抵抗負荷の分担比は、その走行条件、
特に加速度の変化に基づき随時変化する。 By the way, the sharing ratio of the total running resistance load between the front and rear wheels of a four-wheel drive vehicle depends on the driving conditions,
In particular, it changes from time to time based on changes in acceleration.
本発明の特徴的事項は、このような加速度の変
化に伴う四輪駆動車の前輪及び後輪の負荷分担比
の変動を正確に再現し、前輪用ローラ１０ａ及び
後輪用ローラ１０ｂに実走行時と同様な分担抵抗
負荷を与えることにより、実走行に近似した状態
で四輪駆動車の動的な走行性能試験を行うことを
可能とすることにある。 A characteristic feature of the present invention is that it accurately reproduces changes in the load sharing ratio between the front wheels and rear wheels of a four-wheel drive vehicle due to changes in acceleration, and allows the front wheel roller 10a and the rear wheel roller 10b to By applying the same shared resistance load as when driving, it is possible to perform a dynamic driving performance test of a four-wheel drive vehicle under conditions similar to actual driving.
このため、本発明の装置においては、ローラ１
０ａ，１０ｂ上における四輪駆動車の加速度を検
出する加速度検出回路２４が設けられており、実
施例の加速度検出回路２４は速度検出器１４の出
力を微分することにより加速度αを演算し、その
値を分担比設定回路２６に供給している。 Therefore, in the device of the present invention, the roller 1
An acceleration detection circuit 24 is provided to detect the acceleration of the four-wheel drive vehicle on 0a and 10b, and the acceleration detection circuit 24 of the embodiment calculates the acceleration α by differentiating the output of the speed detector 14. The value is supplied to the sharing ratio setting circuit 26.
この分担比設定回路２６は、予め四輪駆動車の
加速度αに対応した前輪用ローラ１０ａ及び後輪
用ローラ１０ｂの負荷分担比データを有し、加速
度検出回路２４から入力された検出加速度αに対
応する負荷分担比を出力する。 This sharing ratio setting circuit 26 has load sharing ratio data of the front wheel roller 10a and the rear wheel roller 10b corresponding to the acceleration α of the four-wheel drive vehicle in advance, and is based on the detected acceleration α input from the acceleration detection circuit 24. Output the corresponding load sharing ratio.
第２図には、本実施例の分担比設定回路２６内
に設定される負荷分担比データが示されており、
実施例のデータは、四輪駆動車を実際の走行路上
を実走行させることにより得られた加速度αと負
荷分担比との相関関係を示している。 FIG. 2 shows load sharing ratio data set in the sharing ratio setting circuit 26 of this embodiment.
The data of the example shows the correlation between the acceleration α and the load sharing ratio obtained by actually driving a four-wheel drive vehicle on an actual road.
このような負荷分担比データの設定は、該デー
タが例えば第２図に示すような直線特性を有する
場合には、該直線を特定する加速走行時における
負荷分担比及び該直線の傾きを与えることにより
行つてもよく、またこれ以外にも、該直線を特定
する任意の二点、例えば定速時における負荷分担
比と加速度α＝0.1ｇの際の負荷分担比を与える
ことによつて行つてもよい。 When setting such load sharing ratio data, for example, if the data has a linear characteristic as shown in FIG. 2, it is necessary to specify the load sharing ratio and the slope of the straight line during acceleration running to specify the straight line. In addition to this, it can also be done by giving any two points that specify the straight line, for example, the load sharing ratio at constant speed and the load sharing ratio when acceleration α = 0.1 g. Good too.
また、このような負荷分担比データが、車両の
加速時と減速時においてその傾きを異にする場合
には、前述と同様にして車両の加速時及び減速時
の負荷分担特性直線をそれぞれ設定すればよい。 Additionally, if such load sharing ratio data has different slopes when the vehicle is accelerating and decelerating, set the load sharing characteristic straight lines during vehicle acceleration and deceleration, respectively, in the same way as described above. Bye.
従つて、例えば加速度検出回路２４の検出する
加速度αが減速方向に0.3ｇであると仮定すれば、
第２図から明らかなように、分担比設定回路２６
からは該検出加速度0.3ｇに対応して前輪用ロー
ラ１０ａ及び後輪用ローラ１０ｂの負荷分担比
ａ：ｂ＝６：４が出力されることになる。 Therefore, for example, assuming that the acceleration α detected by the acceleration detection circuit 24 is 0.3 g in the deceleration direction,
As is clear from FIG. 2, the sharing ratio setting circuit 26
From this, the load sharing ratio a:b=6:4 of the front wheel roller 10a and the rear wheel roller 10b is output corresponding to the detected acceleration of 0.3 g.
このようにして分担比設定回路２６から前輪用
ローラ１０ａ及び後輪用ローラ１０ｂの負荷分担
比ａ：ｂが出力されると、分担抵抗設定回路２８
は次式に基づき前輪用ローラ１０ａの分担抵抗負
荷LA及び後輪用ローラ１０ｂの分担抵抗負荷LB
を次式に基づき演算し、
LA＝ａ／ａ＋ｂLO
LB＝ｂ／ａ＋ｂLO
このようにして求めた分担抵抗負荷LA及びLB
をそれぞれ前輪用ローラ１０ａ及び後輪用ローラ
１０ｂの俳各負荷制御回路３０ａ，３０ｂに供給
する。 When the load sharing ratio a:b of the front wheel roller 10a and the rear wheel roller 10b is output from the sharing ratio setting circuit 26 in this way, the sharing resistance setting circuit 28
are the shared resistance load L A of the front wheel roller 10a and the shared resistance load L B of the rear wheel roller 10b based on the following formula.
Calculate based on the following formula, L A = a / a + b L O L B = b / a + b L O The shared resistive loads L A and L B obtained in this way
are supplied to the load control circuits 30a and 30b of the front wheel roller 10a and the rear wheel roller 10b, respectively.
そして、各負荷制御回路３０ａ，３０ｂは、こ
のような分担抵抗設定回路２８からの入力に基づ
き、対応する直流発電機１２ａ，１２ｂを制御
し、前輪用ローラ１０ａ、後輪用ローラ１０ｂに
対し分担抵抗負荷LA，LBに対応する回転抵抗負
荷を与える。 Then, each load control circuit 30a, 30b controls the corresponding DC generator 12a, 12b based on the input from such a sharing resistance setting circuit 28, and shares the load with respect to the front wheel roller 10a and the rear wheel roller 10b. Apply rotational resistance loads corresponding to resistance loads L A and L B.
実施例の負荷制御回路３０はこのような負荷制
御を行うため、直流発電機１２の吸収する回転ト
ルクを検出するロードセル３６と、アンプ３４を
介して入力される該ロードセル３２の検出トルク
と分割回路２８から供給される分担抵抗負荷とを
照合する照合器３６と、を含み、両照合データが
一致するよう、トルク制御回路３８により直流発
電機１２の電流制御用サイリスタユニツト４０を
制御している。 In order to perform such load control, the load control circuit 30 of the embodiment includes a load cell 36 that detects the rotational torque absorbed by the DC generator 12, a detected torque of the load cell 32 that is input via an amplifier 34, and a division circuit. The torque control circuit 38 controls the current control thyristor unit 40 of the DC generator 12 so that the two pieces of verification data match.
本発明のシヤシダイナモメータは以上の構成か
ら成り、次にその作用を説明する。 The chassis dynamometer of the present invention has the above configuration, and its operation will be explained next.
まず、供試四輪駆動車の走行性能試験を行う場
合には、該四輪駆動車の前輪及び後輪を前輪用ロ
ーラ１０ａ及び後輪用ローラ１０ｂ上にそれぞれ
当接載置する。そして、該四輪駆動車の駆動輪の
回転により、車両が実際に移動することのないよ
う所定の固定手段で車体を固定し、その後該ロー
ラ１０ａ，１０ｂ上において該四輪駆動車の擬似
走行を開始する。 First, when performing a running performance test on a test four-wheel drive vehicle, the front wheels and rear wheels of the four-wheel drive vehicle are placed in contact with the front wheel roller 10a and the rear wheel roller 10b, respectively. Then, the vehicle body is fixed by a predetermined fixing means so that the vehicle does not actually move due to the rotation of the drive wheels of the four-wheel drive vehicle, and then the four-wheel drive vehicle is placed on the rollers 10a and 10b for simulated running. Start.
そして、このようにして擬似走行が開始される
と、負荷演算回路１６により該擬似走行と同様な
実走行において四輪駆動車の前輪及び後輪に加わ
る全走行抵抗負荷LOが演算され、これと同時に
分担比設定回路２６により車両の加速度αに対応
した前輪及び後輪の負荷分担比ａ：ｂが出力され
る。 When the simulated running is started in this way, the load calculation circuit 16 calculates the total running resistance load L O that will be applied to the front wheels and rear wheels of the four-wheel drive vehicle in the same actual running as the simulated running. At the same time, the load sharing ratio setting circuit 26 outputs the load sharing ratio a:b of the front wheels and rear wheels corresponding to the acceleration α of the vehicle.
そして、このようにして出力された全走行抵抗
負荷LO及び負荷分担比ａ：ｂに基づき、前輪用
ローラ１０ａ、後輪用ローラ１０ｂの分担抵抗負
荷LA，LBが演算され、直流発電機１２ａ，１２
ｂにより各前輪用ローラ、後輪用ローラ１０ｂに
該分担抵抗負荷LA，LBが与えられる。 Then, based on the total running resistance load L O and the load sharing ratio a:b output in this way, the shared resistance loads L A and L B of the front wheel roller 10a and the rear wheel roller 10b are calculated, and the DC power generation machine 12a, 12
b, the shared resistance loads L A and L B are applied to each front wheel roller and rear wheel roller 10b.
従つて、本発明においては、例えば加速度α＝
０の場合には、第２図からも明らかなように、前
輪用ローラ１０ａ及び後輪用ローラ１０ｂの負荷
分担比が5.5対4.5に設定され、また例えば加速度
αがα＝0.3ｇの場合には、前輪用ローラ１０ａ
及び後輪用ローラ１０ｂの負荷分担比が５対５に
設定される。 Therefore, in the present invention, for example, acceleration α=
0, as is clear from FIG. 2, the load sharing ratio between the front wheel roller 10a and the rear wheel roller 10b is set to 5.5:4.5, and for example, when the acceleration α is α=0.3g, is the front wheel roller 10a
And the load sharing ratio of the rear wheel roller 10b is set to 5:5.
このように、本発明の装置によれば、各ローラ
１０ａ，１０ｂ上を四輪駆動車が擬似走行してい
る場合に、その加速度αに応じた分担抵抗負荷
LA，LBをもつて各ローラ１０ａ，１０ｂが回転
する。 As described above, according to the device of the present invention, when a four-wheel drive vehicle is pseudo-running on each roller 10a, 10b, the shared resistance load is divided according to the acceleration α.
Each roller 10a, 10b rotates with L A and L B.
従つて、本発明の装置によれば、四輪駆動車が
ローラ１０ａ，１０ｂ上を擬似走行する際に、実
際の加速度走行時と同様な負荷が前輪及び後輪に
与えられることととなり、実走行と同一条件の下
で当該供試四輪駆動車の動的な走行性能試験を行
うことが可能となる。 Therefore, according to the device of the present invention, when the four-wheel-drive vehicle simulates running on the rollers 10a and 10b, the same load is applied to the front wheels and rear wheels as when the four-wheel drive vehicle is running at an actual acceleration, so that the actual acceleration is reduced. It becomes possible to conduct a dynamic driving performance test of the test four-wheel drive vehicle under the same conditions as driving.
この結果、本発明のシヤシダイナモメータでは
ローラ１０ａ，１０ｂ上において四輪駆動車の各
種動的走行性能試験、例えば０〜400ｍ加速特性
試験を正確に行うことが可能となる。更に、本発
明のシヤシダイナモメータによれば、四輪駆動車
の加速減速時における車体の沈込みが極自然に行
われるため、この加減速時に発生する車両の上下
振動を正確に再現し振動特性を考慮した走行性能
試験を行うことが可能となる。 As a result, with the chassis dynamometer of the present invention, it becomes possible to accurately perform various dynamic running performance tests of a four-wheel drive vehicle, such as 0-400 m acceleration characteristic tests, on the rollers 10a and 10b. Furthermore, according to the chassis dynamometer of the present invention, since the vehicle body sinks very naturally when a four-wheel drive vehicle accelerates and decelerates, it is possible to accurately reproduce the vertical vibration of the vehicle that occurs during acceleration and deceleration. It becomes possible to conduct driving performance tests that take characteristics into consideration.
なお、前記実施例の速度検出器１４では、前輪
用ローラ１０ａの回転に基づき車速の検出を行つ
ているが、これ以外にも前輪用ローラ１０ａ及び
後輪用ローラ１０ｂの平均値から車速の検出を求
めることも可能である。 Although the speed detector 14 of the embodiment described above detects the vehicle speed based on the rotation of the front wheel roller 10a, it is also possible to detect the vehicle speed from the average value of the front wheel roller 10a and the rear wheel roller 10b. It is also possible to obtain
［発明の効果］
以上説明したように、本発明によれば、四輪駆
動車の各駆動輪と当接する前輪用ローラ及び後輪
用ローラに、車両の加速度に応じた分担抵抗負荷
をそれぞれ供給することにより、前輪用ローラ及
び後輪用ローラ上において四輪駆動車を実際の走
行条件と等しい状態で擬似走行させることがで
き、これにより四輪駆動車の各種動的な走行性能
試験を正確に行うことが可能となる。[Effects of the Invention] As explained above, according to the present invention, a shared resistance load corresponding to the acceleration of the vehicle is supplied to the front wheel roller and the rear wheel roller that come into contact with each drive wheel of a four-wheel drive vehicle. By doing this, it is possible to simulate driving a four-wheel drive vehicle on the front wheel rollers and rear wheel rollers under the same conditions as the actual driving conditions, making it possible to accurately conduct various dynamic driving performance tests of four wheel drive vehicles. It becomes possible to do so.
第１図は本発明に係る四輪駆動車用シヤシダイ
ナモメータの好適な実施例を示す電気回路図、第
２図は第１図の分担比設定回路２６内に設定され
る分担比データの特性図である。
１０ａ……前輪用ローラ、１０ｂ……後輪用ロ
ーラ、１６……負荷演算回路、２４……加速度検
出回路、２６……分担比設定回路、２８……分担
抵抗設定回路。
FIG. 1 is an electric circuit diagram showing a preferred embodiment of the chassis dynamometer for a four-wheel drive vehicle according to the present invention, and FIG. 2 shows the sharing ratio data set in the sharing ratio setting circuit 26 of FIG. It is a characteristic diagram. 10a...Front wheel roller, 10b...Rear wheel roller, 16...Load calculation circuit, 24...Acceleration detection circuit, 26...Sharing ratio setting circuit, 28...Sharing resistance setting circuit.
Claims (1)
動輪に所定負荷を与えながら四輪駆動車を擬似走
行させる前輪用ローラ及び後輪用ローラと、 該ローラ上を擬似走行する四輪駆動車の走行速
度に基づき四輪駆動車の実走行時における全走行
抵抗負荷を演算する負荷演算回路と、 四輪駆動車の加速度を検出する加速度検出回路
と、 四輪駆動車の加速度に対応した負荷分担比デー
タが予め設定され前記検出加速度に基づき前輪用
ローラ及び後輪用ローラの負荷分担比を出力する
分担比設定回路と、 前記全走行抵抗負荷及び負荷分担比に基づき前
輪用ローラ及び後輪用ローラの分担する分担抵抗
負荷を演算出力する分担抵抗設定回路と、 を含み、該分担抵抗設定回路から出力される分担
抵抗負荷に基づき前輪用ローラ及び後輪用ローラ
の負荷特性を制御し、実走行に近似した状態で四
輪駆動車の試験を行うことを特徴とする四輪駆動
車用シヤシダイナモメータ。 ２ 特許請求の範囲１記載のシヤシダイナモメー
タにおいて、分担比設定回路には、実際の走行路
にて四輪駆動車を走行することにより測定された
負荷分担比データが設定されることを特徴とする
四輪駆動車用シヤシダイナモメータ。[Scope of Claims] 1. A front wheel roller and a rear wheel roller that come into contact with the front and rear drive wheels of a test four-wheel drive vehicle and cause the four-wheel drive vehicle to simulate traveling while applying a predetermined load to the drive wheels; a load calculation circuit that calculates the total running resistance load of the four-wheel-drive vehicle during actual driving based on the traveling speed of the four-wheel-drive vehicle that is simulated traveling above; an acceleration detection circuit that detects the acceleration of the four-wheel-drive vehicle; a sharing ratio setting circuit that has load sharing ratio data corresponding to the acceleration of the wheel drive vehicle set in advance and outputs the load sharing ratio of the front wheel roller and the rear wheel roller based on the detected acceleration; and the total running resistance load and the load sharing. a shared resistance setting circuit that calculates and outputs a shared resistance load to be shared by the front wheel roller and the rear wheel roller based on the ratio; A chassis dynamometer for a four-wheel drive vehicle is characterized in that it controls the load characteristics of the vehicle rollers and tests the four-wheel drive vehicle under conditions approximating actual driving. 2. The chassis dynamometer according to claim 1, characterized in that the load sharing ratio setting circuit is set with load sharing ratio data measured by driving a four-wheel drive vehicle on an actual road. Chassis dynamometer for four-wheel drive vehicles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59112131A JPS60253838A (en) | 1984-05-30 | 1984-05-30 | Chasis dyanamo meter for four-wheel drive automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59112131A JPS60253838A (en) | 1984-05-30 | 1984-05-30 | Chasis dyanamo meter for four-wheel drive automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60253838A JPS60253838A (en) | 1985-12-14 |
| JPH0246891B2 true JPH0246891B2 (en) | 1990-10-17 |
Family
ID=14578973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59112131A Granted JPS60253838A (en) | 1984-05-30 | 1984-05-30 | Chasis dyanamo meter for four-wheel drive automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60253838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0287092U (en) * | 1988-12-24 | 1990-07-10 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4848142A (en) * | 1987-10-15 | 1989-07-18 | Nissan Motor Sales Co., Ltd. | Motor vehicle performance test apparatus |
-
1984
- 1984-05-30 JP JP59112131A patent/JPS60253838A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0287092U (en) * | 1988-12-24 | 1990-07-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60253838A (en) | 1985-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5323644A (en) | Traction control road simulator | |
| JPS5837491B2 (en) | Inertia and road load simulator | |
| JP2004020401A (en) | Chassis dynamo apparatus and vehicle testing method | |
| JP3279898B2 (en) | Running resistance measuring method and device | |
| JPH11352022A (en) | Vibration testing device for vehicle | |
| JPH0246891B2 (en) | ||
| US3955410A (en) | Method for measuring a driving power by means of an induction motor | |
| JPS61120941A (en) | Chassis dynamometer for four-wheel-driven vehicle | |
| JPS61734A (en) | Chassis dynamometer for 4wd vehicle | |
| JPS60253839A (en) | Chasis dynamo meter for four-wheel drive automobile | |
| CN209230963U (en) | A kind of electric automobile during traveling mile detection device | |
| JP2013019669A (en) | Vehicle testing apparatus | |
| JPS61231429A (en) | Chassis dynamo for four-wheel driven car | |
| JPH0221535B2 (en) | ||
| JPS61204538A (en) | Chassis dynamo for four-wheel drive vehicle | |
| JP2001091411A (en) | Front-rear axle load controlling method in four-wheel drive vehicle bench test | |
| JPH037895B2 (en) | ||
| JPH052261B2 (en) | ||
| JPS61202138A (en) | Chasis dynamometer for four-wheel-driven vehicle | |
| JPS61231430A (en) | Chassis dynamo for pour-wheel driven car | |
| JP2797180B2 (en) | Chassis dynamometer for measuring transient power characteristics | |
| SU1012072A1 (en) | Vehicle testing stand | |
| JPS61204537A (en) | Chassis dynamo for vehicle | |
| JP3201548B2 (en) | Chassis dynamometer controller | |
| JPS6145767B2 (en) |