WO2014185222A1 - エンジンベンチシステム - Google Patents
エンジンベンチシステム Download PDFInfo
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- WO2014185222A1 WO2014185222A1 PCT/JP2014/061139 JP2014061139W WO2014185222A1 WO 2014185222 A1 WO2014185222 A1 WO 2014185222A1 JP 2014061139 W JP2014061139 W JP 2014061139W WO 2014185222 A1 WO2014185222 A1 WO 2014185222A1
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- engine
- torque
- dynamometer
- shaft torque
- command value
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- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
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- 238000002474 experimental method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
- G01M15/044—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests
Definitions
- the present invention relates to an engine bench system. More particularly, the present invention relates to an engine bench system in which a dynamometer is connected as a power absorber to an engine-equipped specimen to measure various characteristics of the engine.
- FIG. 5 is a diagram showing the configuration of the engine bench system 100.
- the engine bench system 100 includes a specimen W configured of an engine E and its output shaft SW, a dynamometer DY connected as a power absorber to the output shaft SW of the specimen W, and an engine via a throttle actuator 110
- the engine controller 120 for controlling E, the dynamo controller 140 for controlling the dynamometer DY through the inverter 130, the encoder 150 for detecting the number of rotations of the output shaft of the dynamometer DY, and the output shaft SW of the sample W
- an axial torque sensor 160 for detecting an axial torque (twisting torque) of a coupling portion between the second motor and the output shaft of the dynamometer DY.
- mechanical elements such as a clutch, a transmission, and a propeller shaft are collectively shown as an output shaft SW in a simplified manner.
- the engine controller 120 controls the output of the engine E in a manner predetermined for each test item, and the dynamo controller 140 controls the number of revolutions of the dynamometer DY based on the outputs of the encoder 150 and the shaft torque sensor 160, etc. And control the torque (see, for example, Patent Document 1).
- the racing test measures the characteristics of the engine during so-called runaway. More specifically, the change in the number of revolutions of the dynamometer DY (for example, how the number of revolutions rises, the maximum value, etc.) when the throttle opening degree is fully opened for a short period of time from the idling state is measured.
- DY for example, how the number of revolutions rises, the maximum value, etc.
- the shaft torque command value input to the dynamo controller 140 is set to zero. That is, in the dynamo controller 140, torque is generated by the dynamometer DY so that no torsional torque is generated by the shaft torque sensor 160, that is, no load is applied to the engine E.
- FIG. 6 is a diagram showing the results of a racing test in the conventional engine bench system 100.
- the measurement result by the engine bench system 100 that is, the rotational speed measured by the encoder 150 is indicated by a thin solid line.
- the result at the time of measuring only with an engine is shown by a thick broken line.
- the engine alone refers to a state in which the engine E and the output shaft SW are separated and the engine E is unloaded.
- the thick broken line in FIG. 6 shows the change in the actual engine speed when the throttle is fully opened with the clutch disengaged. Therefore, the thick broken line in FIG. 6 is a value that is an ideal value of the measurement result by the engine bench system 100.
- the measurement result (thin solid line) by the engine bench system 100 is always smaller than the ideal value (thick dashed line).
- the engine bench system 100 attempts to reproduce a state in which no load is applied to the engine E by setting the shaft torque command value to 0 when performing the racing test.
- the inertia from the shaft torque sensor 160 to the crankshaft of the engine E that is, the inertia of the output shaft SW must be borne on the engine E side, and as a result, the measurement results fall below the ideal values at both acceleration and deceleration.
- the inertia of the output shaft SW can also be borne by the dynamometer DY.
- the closer the shaft torque sensor 160 is to the engine E the easier it is for the heat of the engine E to be transmitted, so the influence of the change in the measured value due to the temperature drift becomes greater.
- the shaft torque sensor 160 is brought closer to the engine E, the vibration of the engine E is more easily transmitted, and the measurement accuracy is lowered. From the above reasons, it is preferable that the position of the shaft torque sensor 160 be closer to the dynamometer DY than the engine E.
- An object of the present invention is to provide an engine bench system capable of accurately performing a racing test based on an output value of an axial torque meter provided closer to a dynamometer than an engine.
- a dynamometer for example, a dynamometer DY described later whose output shaft is connected to a specimen (for example, a specimen W described later), and an output of the dynamometer
- An axial torque detector for example, an axial torque sensor 7 described later for detecting a torsional torque (T23) at the joint between the shaft and the test object, and the specimen includes an engine main body (for example an engine described later
- An engine bench system for example, an engine bench described later
- a main body W1 for example, an intermediate coupled body (for example, an intermediate combined body W2 described below) connecting the crankshaft of the engine body and the output shaft of the dynamometer
- the engine bench system includes an engine-side shaft torque command value (T12ref) corresponding to a command value for a twisting torque (T12) at a connection portion between the intermediate assembly and the engine body, and a moment of inertia (J2) of the intermediate assembly.
- T12ref engine-side shaft torque command value
- J2 moment of inertia
- An axial torque command generation device (for example, an axial torque described later) which calculates a dynamo-side axial torque command value (T23ref) corresponding to a command value for torsional torque in the axial torque detector by adding together a torque value proportional to An axial torque controller that generates a torque control signal (T3) of the dynamometer based on the command generation device 61), the dynamo side axial torque command value (T23ref), and the output value (T23) of the axial torque detector.
- T3 torque control signal
- the engine bench system further includes a rotation number detector (for example, an encoder 8 described later) for detecting the rotation number of the output shaft of the dynamometer, and the shaft torque command generation device
- the dynamo-side shaft torque command value (T23ref) is obtained by adding together the torque value obtained by multiplying the differential value of the output of the number detector by the moment of inertia of the intermediate assembly and the engine-side shaft torque command value. It is preferable to calculate.
- the torque torque detector detects twisting torque at the joint between the engine body and the specimen consisting of the intermediate body and the dynamometer, and the torque controller determines the output value of the shaft torque detector and a predetermined value.
- the torque control signal is generated based on the dynamo side shaft torque command value of Further, in the shaft torque command generation device according to the present invention, the dynamo side shaft torque command value is calculated by adding up the predetermined engine side shaft torque command value and the torque value proportional to the inertia moment of the intermediate combination, Input to the controller.
- the present invention by determining the dynamo side shaft torque command value including the torque value proportional to the inertia moment of the intermediate coupled body as described above, at least a part of the inertia of the intermediate coupled body is to be borne by the dynamometer side. Can. Therefore, according to the present invention, since the load applied to the engine body can be reduced as compared with the conventional case, the performance of only the engine body can be evaluated with high accuracy in the racing test.
- a torque value obtained by multiplying the predetermined engine side shaft torque command value and the differential value of the output of the rotational speed detector by the moment of inertia of the intermediate coupled body (that is, accelerating or decelerating the intermediate coupled body)
- a dynamo side shaft torque command value is calculated by adding up the torque value to be calculated.
- the engine bench system of the present invention is appropriately approximated by a three-inertia system model configured by connecting three inertia bodies by two spring elements. Then, since the torque value for accelerating and decelerating the intermediate coupled body is substantially equal to the difference between the dynamo side shaft torque and the engine side axial torque, the intermediate coupled body is determined by determining the dynamo side shaft torque command value as described above.
- the engine side shaft torque can be controlled also by the shaft torque detector provided on the dynamometer side. Therefore, according to the present invention, it is possible to realize a state in which the engine body is substantially unloaded only by setting the engine side shaft torque command value to 0. Therefore, in the racing test, the performance of only the engine body can be evaluated accurately.
- FIG. 1 is a diagram showing a configuration of an engine bench system 1 according to the present embodiment.
- the engine bench system 1 includes a test object W including an engine E and a shaft SW, a dynamometer DY connected to the test object W as a power absorber, and an engine controller 5 for controlling the engine E via the throttle actuator 2
- a dynamo controller 6 for controlling the dynamometer DY through the inverter 3
- an axial torque sensor 7 for detecting a torsion torque at a joint between the shaft SW of the sample W and the output shaft SD of the dynamometer DY, and the dynamometer
- an encoder 8 for detecting the number of rotations of the output shaft SD of DY.
- the specimen W as a test target by the engine bench system 1 is configured by combining the engine E, the clutch C, the transmission TM, and the shaft SW as shown in FIG. That is, in the clutch C, the sample W can cut off the mechanical connection between the engine body W1 including the engine E and the crankshaft thereof and the intermediate coupled body W2 including the transmission TM and the shaft S. It has become. Further, since the specimen W thus includes the clutch C and the transmission TM, the overall rigidity is lower than the rigidity of the shaft torque sensor 7.
- the engine controller 5 controls the output of the engine E in a manner determined for each test item.
- the dynamo controller 6 corresponds to the torque value to be generated by the dynamometer DY based on the outputs of the shaft torque sensor 7 and the encoder 8 so that the power of the engine E is absorbed in a manner determined for each test item.
- a torque control signal is generated and input to the inverter 3.
- the mechanical system configuration of the engine bench system 1 is a three-inertia system model configured by connecting three inertia bodies each having a unique inertia moment as shown in FIG. 2 by two spring elements. Approximate. As described above, since the specimen as a whole has low rigidity, approximation by a three-inertia system model as shown in FIG. 2 is appropriate.
- J1 corresponds to the moment of inertia of the engine body.
- J3 corresponds to the moment of inertia of the dynamometer.
- J2 corresponds to the moment of inertia of the intermediate coupled body.
- T12 corresponds to the twisting torque at the junction of the engine body and the intermediate assembly.
- T23 corresponds to the twisting torque at the junction of the intermediate assembly and the dynamometer.
- the twisting torque T12 is referred to as an engine side shaft torque
- the twisting torque T23 is referred to as a dynamo side shaft torque.
- the dynamo side shaft torque T23 corresponds to the output value of the shaft torque sensor.
- T3 corresponds to the generated torque of the dynamometer. That is, the generated torque T3 corresponds to the value of the torque control signal generated by the dynamo controller 6.
- W3 corresponds to the rotation speed of the output shaft of the dynamometer. That is, the rotational speed w3 corresponds to the output value of the encoder.
- FIG. 3 is a block diagram showing a configuration of a control circuit of axial torque control by the dynamo controller 6.
- the dynamo controller 6 generates a torque control signal T3 based on the shaft torque command generation device 61 that generates a command value T23ref for the dynamo shaft torque, the dynamo shaft torque command value T23ref, and the output value T23 of the shaft torque sensor.
- An axial torque controller 62, and a parameter identifier 63 for sequentially identifying control parameters used in the axial torque controller 62.
- the shaft torque command generation device 61 generates a command value for the dynamo-side shaft torque T23 based on the command value T12ref for the engine-side shaft torque T12 and the output value w3 of the encoder. More specifically, as shown in the following equation (1), the shaft torque command generation device 61 has an engine side shaft torque command value T12ref input from the outside, a torque value for accelerating / decelerating the intermediate coupled body, That is, a value obtained by adding the torque value obtained by multiplying the output value w3 of the encoder by the pseudodifferentiation and the torque value obtained by multiplying the moment of inertia J2 of the intermediate coupled body is taken as the dynamo side shaft torque command value T23ref. A predetermined value is used as the cutoff frequency f1 characterizing the pseudo differential.
- the shaft torque controller 62 generates a torque control signal T3 based on the dynamo side shaft torque command value T23ref and the shaft torque sensor output T23. More specifically, the axial torque controller 62 generates a torque control signal T3 by the calculation shown in the following equation (2) using the axial torque command value T23ref and the axial torque sensor output T23 as an input.
- the calculation of the equation (2) is performed by integrating the deviation of the dynamo side shaft torque command value T23ref and the filter value of the shaft torque sensor output T23, differentiating the shaft torque sensor output T23, and proportioning the shaft torque sensor output T23. It consists of the operation.
- the shaft torque controller 62 is controlled by the integral calculation in block 621 so that the deviation between the dynamo side shaft torque command value T23ref and the shaft torque sensor output T23 becomes small. Further, in the equation of motion of the 3-inertia system model shown in FIG. 2, assuming that the rotation speed w2 of the intermediate coupled body and the rotation speed w3 of the dynamometer are equal, the following equation (3) is derived. J2 (dw3 / dt) T T23-T12 (3)
- the shaft torque command generation device 61 by including the torque value (J2 (dw3 / dt)) for accelerating / decelerating the intermediate coupled body in the dynamo side shaft torque command value as shown in the above equation (1).
- the following equation (4) is derived. That is, by controlling the dynamometer so that the deviation between the dynamo side shaft torque command value T23ref and the shaft torque sensor output T23 becomes small by integral calculation in the shaft torque controller 62, the engine side shaft torque command input from the outside The deviation between the value T12ref and the engine-side shaft torque T12 can also be reduced simultaneously.
- T12ref-T12 T23ref-T23 (4)
- the parameter identifier 63 controls axial torque based on values such as the moment of inertia J1 to J3, the spring stiffness K12 between the engine body and the intermediate combination, and the spring stiffness K23 between the intermediate combination and the dynamometer.
- Concrete values of the control parameters Ki, Kd, Kp in the unit 62 are sequentially identified. The detailed procedure for identifying specific values of these control parameters Ki, Kd, and Kp is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-133714 by the applicant of the present application, and therefore, more detailed description is given here. I omit explanation.
- FIG. 4 is a diagram showing the results of a racing test by the engine bench system 1 of the present embodiment.
- the measurement result by the engine bench system 1, that is, the rotational speed measured by the encoder 8 is indicated by a thin solid line.
- the engine side shaft torque command value T12ref is set to 0 in order to reduce the load on the engine.
- values which are ideal values of measurement results by the engine bench system 1 are indicated by thick broken lines.
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Abstract
Description
エンジンベンチシステム100は、エンジンE及びその出力軸SWで構成される供試体Wと、この供試体Wの出力軸SWに動力吸収体として接続されたダイナモメータDYと、スロットルアクチュエータ110を介してエンジンEを制御するエンジン制御器120と、インバータ130を介してダイナモメータDYを制御するダイナモ制御器140と、ダイナモメータDYの出力軸の回転数を検出するエンコーダ150と、供試体Wの出力軸SWとダイナモメータDYの出力軸との結合部の軸トルク(捩れトルク)を検出する軸トルクセンサ160と、を備える。なお図5では、クラッチ、トランスミッション、及びプロペラシャフトなどの機械要素をまとめて出力軸SWとして簡略化して示す。
図1は、本実施形態に係るエンジンベンチシステム1の構成を示す図である。
エンジンベンチシステム1は、エンジンE及びシャフトSWを備える供試体Wと、供試体Wに動力吸収体として接続されたダイナモメータDYと、スロットルアクチュエータ2を介してエンジンEを制御するエンジン制御器5と、インバータ3を介してダイナモメータDYを制御するダイナモ制御器6と、供試体WのシャフトSWとダイナモメータDYの出力軸SDとの結合部における捩れトルクを検出する軸トルクセンサ7と、ダイナモメータDYの出力軸SDの回転数を検出するエンコーダ8と、を備える。
ダイナモ制御器6は、試験項目ごとに定められた態様でエンジンEの動力が吸収されるように、軸トルクセンサ7及びエンコーダ8の出力に基づいてダイナモメータDYで発生させるべきトルク値に相当するトルク制御信号を生成し、インバータ3へ入力する。
ダイナモ制御器6は、ダイナモ側軸トルクに対する指令値T23refを生成する軸トルク指令生成装置61と、ダイナモ側軸トルク指令値T23refと軸トルクセンサの出力値T23とに基づいてトルク制御信号T3を生成する軸トルク制御器62と、軸トルク制御器62において用いられる制御パラメータを逐次同定するパラメータ同定器63と、を備える。
J2(dw3/dt)≒T23-T12 (3)
T12ref-T12=T23ref-T23 (4)
図4は、本実施形態のエンジンベンチシステム1によるレーシング試験の結果を示す図である。図4には、エンジンベンチシステム1による測定結果、すなわちエンコーダ8によって測定された回転数を細実線で示す。このレーシング試験では、エンジンにかかる負担を小さくするため、エンジン側軸トルク指令値T12refを0とした。また図4には、図6と同様にエンジンベンチシステム1による測定結果の理想値となる値を太破線で示す。
61…軸トルク指令生成装置
62…軸トルク制御器
7…軸トルクセンサ(軸トルク検出器)
8…エンコーダ(回転数検出器)
DY…ダイナモメータ
W…供試体
W1…エンジン本体
W2…中間結合体
Claims (2)
- その出力軸が供試体に接続されたダイナモメータと、
前記ダイナモメータの出力軸と前記供試体との結合部における捩れトルクを検出する軸トルク検出器と、を備え、
前記供試体は、エンジン本体と、当該エンジン本体のクランクシャフトと前記ダイナモメータの出力軸とを接続する中間結合体と、に分けられるエンジンベンチシステムであって、
前記中間結合体と前記エンジン本体の結合部における捩れトルクに対する指令値に相当するエンジン側軸トルク指令値と、前記中間結合体の慣性モーメントに比例したトルク値とを合算することにより、前記軸トルク検出器における捩れトルクに対する指令値に相当するダイナモ側軸トルク指令値を算出する軸トルク指令生成装置と、
前記ダイナモ側軸トルク指令値と前記軸トルク検出器の出力値とに基づいて前記ダイナモメータのトルク制御信号を生成する軸トルク制御器と、を備えることを特徴とするエンジンベンチシステム。 - 前記ダイナモメータの出力軸の回転数を検出する回転数検出器をさらに備え、
前記軸トルク指令生成装置は、前記回転数検出器の出力の微分値に前記中間結合体の慣性モーメントを乗算して得られるトルク値と、前記エンジン側軸トルク指令値と、を合算することによりダイナモ側軸トルク指令値を算出することを特徴とする請求項1に記載のエンジンベンチシステム。
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US14/891,287 US9400231B2 (en) | 2013-05-15 | 2014-04-21 | Engine bench system |
CN201480027333.1A CN105283749B (zh) | 2013-05-15 | 2014-04-21 | 发动机台架系统 |
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JP2013103382A JP5708704B2 (ja) | 2013-05-15 | 2013-05-15 | エンジンベンチシステム |
JP2013-103382 | 2013-05-15 |
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JP5673727B2 (ja) | 2013-04-26 | 2015-02-18 | 株式会社明電舎 | トルク指令生成装置 |
JP5800001B2 (ja) * | 2013-10-07 | 2015-10-28 | 株式会社明電舎 | ダイナモメータシステム |
SE538492C2 (sv) * | 2014-03-31 | 2016-08-02 | Rototest Int Ab | Förfarande och system för användning vid dynamometerprovningav ett motorfordon |
JP6044647B2 (ja) | 2015-01-13 | 2016-12-14 | 株式会社明電舎 | ダイナモメータの制御装置及びこれを用いた慣性モーメント推定方法 |
JP6044649B2 (ja) * | 2015-01-19 | 2016-12-14 | 株式会社明電舎 | ダイナモメータシステムの制御装置 |
JP6168126B2 (ja) | 2015-11-09 | 2017-07-26 | 株式会社明電舎 | ダイナモメータシステムのダイナモ制御装置及びそのエンジン始動方法 |
JP6659492B2 (ja) * | 2016-07-27 | 2020-03-04 | 株式会社エー・アンド・デイ | エンジン試験装置 |
JP6659491B2 (ja) * | 2016-07-27 | 2020-03-04 | 株式会社エー・アンド・デイ | エンジン試験装置 |
JP6645525B2 (ja) * | 2018-02-23 | 2020-02-14 | 株式会社明電舎 | 試験システムの制御装置 |
JP6660038B1 (ja) * | 2018-11-05 | 2020-03-04 | 株式会社明電舎 | 軸トルク制御装置 |
AT522353B1 (de) * | 2019-08-05 | 2020-10-15 | Avl List Gmbh | Prüfstand und Verfahren zur Durchführung eines Prüflaufs auf einem Prüfstand |
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JP2014224722A (ja) | 2014-12-04 |
JP5708704B2 (ja) | 2015-04-30 |
US20160084735A1 (en) | 2016-03-24 |
US9400231B2 (en) | 2016-07-26 |
CN105283749A (zh) | 2016-01-27 |
CN105283749B (zh) | 2017-04-12 |
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