JP2010104163A - Driving force controller - Google Patents

Driving force controller Download PDF

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JP2010104163A
JP2010104163A JP2008274111A JP2008274111A JP2010104163A JP 2010104163 A JP2010104163 A JP 2010104163A JP 2008274111 A JP2008274111 A JP 2008274111A JP 2008274111 A JP2008274111 A JP 2008274111A JP 2010104163 A JP2010104163 A JP 2010104163A
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motors
power
vehicle
power supply
motor
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Yoichiro Yu
陽一郎 勇
Kazuya Arakawa
一哉 荒川
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Toyota Motor Corp
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Toyota Motor Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2036—Electric differentials, e.g. for supporting steering vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/04—Cutting off the power supply under fault conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/28—Four wheel or all wheel drive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Abstract

<P>PROBLEM TO BE SOLVED: To suppress a change in behavior of a vehicle when one of motors disposed on left/right wheels fails. <P>SOLUTION: When a failure detecting means detects a failure of one of motors 4L and 4R disposed on left/right wheels 3FL and 3FR, a circuit between an energy storage device and a motor ECU is electrically or mechanically disconnected by a power supply shut off mechanism 7 to cut off power supply to the motor ECU. As a result, the motor ECU does not operate and both motors 4L and 4R do not generate a driving torque, so that a change in behavior of a vehicle Ve is suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、複数の車輪を個別独立して駆動あるいは制動可能な車両の駆動力制御装置に関するものである。   The present invention relates to a vehicle driving force control apparatus capable of individually driving or braking a plurality of wheels.

従来、車輪ごとにモータを有して各車輪を個別独立して駆動可能な車両が提案されており、その一例が特許文献１ないし特許文献５に記載されている。これらの特許文献１ないし特許文献３には、複数の車輪に設けられた電動機のいずれかが駆動不能になった場合に、他の各車輪に設けられた電動機によって車両の駆動トルクを分配し、車両の挙動変化が生じにくいように構成されている。また、電動機に電力を供給するインバータに異常が生じた場合には、異常が発生したインバータを使用せず、他の正常に動作するインバータを電動機に接続して電動機を駆動させて車両の挙動変化が抑えられるように構成されている。さらにまた、特許文献４および特許文献５には、電動機を個別独立して制御するためのインバータの制御装置が記載されている。   2. Description of the Related Art Conventionally, a vehicle that has a motor for each wheel and can drive each wheel individually has been proposed, and examples thereof are described in Patent Documents 1 to 5. In these patent documents 1 thru / or patent documents 3, when any of the electric motors provided on the plurality of wheels becomes impossible to drive, the driving torque of the vehicle is distributed by the electric motors provided on the other wheels, The vehicle behavior is not easily changed. In addition, when an abnormality occurs in the inverter that supplies power to the motor, the behavior of the vehicle is changed by connecting the other normally operating inverter to the motor and driving the motor without using the inverter in which the abnormality has occurred. Is configured to be suppressed. Furthermore, Patent Literature 4 and Patent Literature 5 describe inverter control devices for individually and independently controlling electric motors.

特開２００５−１１９６４７号公報JP 2005-119647 A 特開２００７−２０３９９８号公報JP 2007-203998 A 特開２００８−３０６２６号公報JP 2008-30626 A 特開平５−１５３７０２号公報JP-A-5-153702 特開２００８ー１８７８４２号公報JP 2008-187842 A

特許文献１ないし特許文献３に記載された各発明は、電動機が駆動不能となった場合に車両の挙動変化を抑えるように構成されているが、電動機が駆動不能状態と駆動可能状態とを繰り返し、いわゆる制御のハンチングが発生した場合については考慮されていない。例えば特許文献１には、左右の駆動輪ごとにインバータを設け、いずれか一方が故障した場合に、他方のインバータを代替的に使用して故障している側の駆動輪で再度駆動力を発生できるように復帰させる装置が記載されている。しかしながら、故障の原因あるいは要因が除去されていない状態で駆動力を復帰させると、再度故障が生じ、制御のハンチングが生じ、あるいは駆動力の変動が頻発して車両の挙動が不安定になるなどの可能性がある。   Each invention described in Patent Literature 1 to Patent Literature 3 is configured to suppress a change in the behavior of the vehicle when the electric motor becomes incapable of driving, but the electric motor repeatedly repeats the incapable driving state and the drivable state. The case where so-called control hunting occurs is not taken into consideration. For example, in Patent Document 1, an inverter is provided for each of the left and right drive wheels, and if one of them fails, the other inverter is used as an alternative, and the drive power is generated again on the failed drive wheel. A device is described that allows it to be restored. However, if the driving force is restored in a state where the cause or cause of the failure has not been removed, the failure will occur again, control hunting will occur, or fluctuations in the driving force will occur frequently and the behavior of the vehicle will become unstable. There is a possibility.

この発明は上記の技術的課題に着目してなされたものであり、左右二輪に個別に設けられた電動機のいずれか一方の電動機が駆動不能な場合に、車両安定性を確保しつつ、制御のハンチングを抑制できる駆動力制御装置を提供することを目的とするものである。   The present invention has been made paying attention to the technical problem described above, and when one of the motors individually provided on the left and right wheels cannot be driven, while ensuring vehicle stability, the control is performed. An object of the present invention is to provide a driving force control device capable of suppressing hunting.

上記の目的を達成するために、請求項１の発明は、車両における複数の車輪のうち少なくとも左右二輪に個別に設けられ、かつ供給される電力の増減にともなって駆動トルクが増減される電動機の駆動力制御装置において、前記電動機に対する電力供給の瞬断を含む前記電動機の故障を検出する故障検出手段と、前記故障検出手段によって前記電動機のいずれか一方に故障が検出された場合に、前記左右の電動機の両方に対する前記電力の供給を電気的もしくは機械的に遮断する電力供給遮断機構とを備えていることを特徴とするものである。   In order to achieve the above object, an invention according to claim 1 is an electric motor that is individually provided on at least two left and right wheels among a plurality of wheels in a vehicle, and whose driving torque is increased or decreased in accordance with increase or decrease in supplied power. In the driving force control device, when the failure is detected in any one of the motors by a failure detection unit that detects a failure of the motor including a momentary interruption of power supply to the motor, the left and right And an electric power supply cutoff mechanism that electrically or mechanically interrupts the supply of the electric power to both of the electric motors.

請求項１の発明によれば、故障検出手段によって左右二輪のいずれか一方の電動機の故障が検出された場合に、左右二輪に個別に設けられた電動機の両方に対する電力供給が電力供給遮断機構によって電気的もしくは機械的に遮断されるので、左右二輪間における駆動トルクの変化を抑制でき、車両の挙動変化を抑えることができる。また、電力の供給が遮断されるから、電動機が駆動不能状態と駆動可能状態とを繰り返し、いわゆる制御のハンチングが発生することを防止もしくは抑制することができる。   According to the first aspect of the present invention, when the failure detection means detects a failure of one of the left and right two-wheeled motors, the power supply to both of the motors individually provided on the left and right two wheels is performed by the power supply cutoff mechanism. Since it is electrically or mechanically interrupted, a change in driving torque between the left and right wheels can be suppressed, and a change in vehicle behavior can be suppressed. In addition, since the supply of electric power is cut off, it is possible to prevent or suppress the occurrence of so-called control hunting by repeatedly driving the electric motor in an inoperable state and in an operable state.

つぎに、この発明の実施例を図面に基づいて説明する。図１は、この発明で対象とする車両Ｖｅを模式的に示す図であり、符号１はエンジンを示し、符号２は動力伝達軸を示し、この動力伝達軸２を介して、エンジン１の出力するトルクを右後輪３ＲＲ，左後輪３ＲＬに伝達するように構成されている。また右前輪３ＦＲおよび左前輪３ＦＬには、その左右前輪３ＦＬ，３ＦＲを独立して駆動可能な電動機４Ｌ，４Ｒが設けられている。また、符号５はインバータを示し、このインバータ５によって、図示しない蓄電装置から供給された電力を電動機４Ｌ，４Ｒの駆動に適した電力値に変換する。インバータ５によって変換された電力が回路６Ｌ，６Ｒを流れて電動機４Ｌ，４Ｒに供給される。なお、電動機４Ｌ，４Ｒは、図示しないモータ制御装置（以下、モータＥＣＵと記す。）によって制御されるように構成されている。また、このモータＥＣＵは、この発明における電動機の故障を検出する故障検出手段に相当する。符号７は、電力供給遮断機構を示し、この電力供給遮断機構７は蓄電装置とモータＥＣＵとの間の回路に介在され、電動機４Ｌ，４Ｒへの電力供給を電気的もしくは機械的に遮断することができるように構成されている。   Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a vehicle Ve that is an object of the present invention. Reference numeral 1 indicates an engine, reference numeral 2 indicates a power transmission shaft, and the output of the engine 1 is transmitted via the power transmission shaft 2. Torque is transmitted to the right rear wheel 3RR and the left rear wheel 3RL. The right front wheel 3FR and the left front wheel 3FL are provided with electric motors 4L, 4R that can independently drive the left and right front wheels 3FL, 3FR. Reference numeral 5 denotes an inverter. The inverter 5 converts electric power supplied from a power storage device (not shown) into an electric power value suitable for driving the electric motors 4L and 4R. The electric power converted by the inverter 5 flows through the circuits 6L and 6R and is supplied to the electric motors 4L and 4R. The electric motors 4L and 4R are configured to be controlled by a motor control device (not shown) (hereinafter referred to as a motor ECU). The motor ECU corresponds to a failure detecting means for detecting a failure of the electric motor in the present invention. Reference numeral 7 denotes a power supply cutoff mechanism. The power supply cutoff mechanism 7 is interposed in a circuit between the power storage device and the motor ECU, and electrically or mechanically cuts off the power supply to the motors 4L and 4R. It is configured to be able to.

エンジン１としてはガソリンエンジンまたはディーゼルエンジンまたはＬＰＧエンジンなどが挙げられる。以下に記す実施例では、主としてガソリンエンジンが使用された場合について説明する。さらに、電動機には、電力の供給により駆動され電動機としての力行機能と、機械エネルギを電気エネルギに変換する発電機としての回生機能とを兼ね備えたモータ・ジェネレータを用いることができる。   Examples of the engine 1 include a gasoline engine, a diesel engine, and an LPG engine. In the embodiment described below, a case where a gasoline engine is mainly used will be described. Furthermore, a motor / generator having both a power running function as a motor driven by the supply of electric power and a regeneration function as a generator that converts mechanical energy into electric energy can be used as the motor.

また図２に、この発明における電力供給遮断機構７の一例を模式的に示してある。この電力供給遮断機構７は、蓄電装置とモータＥＣＵとの間の回路に介在されている。また、図２に示す例はいわゆる電力ヒューズ８であり、定格以上の電流を印加すると過大なジュール熱が発生して自らを溶かして、電力回路を切断するように構成されている。   FIG. 2 schematically shows an example of the power supply cutoff mechanism 7 in the present invention. The power supply cutoff mechanism 7 is interposed in a circuit between the power storage device and the motor ECU. The example shown in FIG. 2 is a so-called power fuse 8, which is configured to generate excessive Joule heat and melt itself when a current exceeding the rating is applied, thereby cutting the power circuit.

つぎに、上記のように構成された車両Ｖｅの動作例について説明する。例えば車両Ｖｅの走行中の振動によって電動機４Ｌ，４Ｒのいずれか一方が故障したことが故障検出手段によって検出されると、蓄電装置とモータＥＣＵとの間の回路に介在されている電力ヒューズ８に定格以上の過電流を印加するように制御される。すると、過大なジュール熱が発生して回路が溶解し、電気的もしくは機械的に切断される。その結果、モータＥＣＵが作動せず、また回路６Ｌ，６Ｒにも電力が供給されないので電動機４Ｌ，４Ｒの両方が駆動トルクを発生せず、車両Ｖｅの挙動変化を抑えることができる。   Next, an operation example of the vehicle Ve configured as described above will be described. For example, when the failure detection means detects that one of the electric motors 4L and 4R has failed due to vibration during traveling of the vehicle Ve, the power fuse 8 interposed in the circuit between the power storage device and the motor ECU It is controlled to apply an overcurrent exceeding the rating. Then, excessive Joule heat is generated, the circuit is melted, and is electrically or mechanically disconnected. As a result, since the motor ECU does not operate and no power is supplied to the circuits 6L and 6R, both the motors 4L and 4R do not generate driving torque, and the behavior change of the vehicle Ve can be suppressed.

また、悪路などの振動によって電動機４Ｌ，４Ｒのいずれか一方に対する電力供給の瞬断が平坦路の走行時と比較して相対的に多いことが故障検出手段によって検出されると、前述と同様に電力ヒューズ８に定格以上の過電流を印加するように制御される。すると、回路が過大なジュール熱によって電気的もしくは機械的に切断されて、モータＥＣＵが作動せず、また回路６Ｌ，６Ｒにも電力が供給されないので電動機４Ｌ，４Ｒの両方が駆動不能となる。その結果、電動機４Ｌ，４Ｒの両方が駆動トルクを生じないので車両Ｖｅの挙動変化を抑えることができる。また、瞬断による電動機４Ｌ，４Ｒの駆動可能状態と駆動不能状態とが断続的に継続されることを回避できるので、いわゆる制御のハンチングを回避でき、車両Ｖｅの挙動を安定に保つことができる。   Further, when the failure detection means detects that the instantaneous power supply interruption to either one of the motors 4L, 4R is relatively greater than that on a flat road due to vibration such as a bad road, the same as described above. The power fuse 8 is controlled so as to apply an overcurrent exceeding the rating. Then, the circuit is electrically or mechanically disconnected by excessive Joule heat, the motor ECU does not operate, and no power is supplied to the circuits 6L and 6R, so that both the motors 4L and 4R cannot be driven. As a result, since both of the electric motors 4L and 4R do not generate driving torque, it is possible to suppress the behavior change of the vehicle Ve. In addition, since it is possible to avoid intermittently continuing the driveable state and the undriveable state of the electric motors 4L and 4R due to instantaneous interruption, so-called control hunting can be avoided and the behavior of the vehicle Ve can be kept stable. .

また図３には、この発明における電力供給遮断機構７の他の例を模式的に示してある。図３に示す例はいわゆる継電器９であり、電流を印加した場合に接点１０を開いて、電力を電気的もしくは機械的に遮断するように構成されたＢ接点式電磁継電器９を示している。ここで、図３（ａ）は、Ｂ接点式電磁継電器９の接点１０が閉じられて電動機４Ｌ，４Ｒに電力が供給されている状態を示しており、図３（ｂ）は、接点１０が開かれて電動機４Ｌ，４Ｒに電力が供給されていない状態を示している。   FIG. 3 schematically shows another example of the power supply cutoff mechanism 7 according to the present invention. The example shown in FIG. 3 is a so-called relay 9, which shows a B-contact type electromagnetic relay 9 configured to open the contact 10 and to cut off electric power electrically or mechanically when a current is applied. Here, FIG. 3A shows a state in which the contact 10 of the B-contact type electromagnetic relay 9 is closed and power is supplied to the motors 4L and 4R, and FIG. It shows a state where the electric motors 4L and 4R are not supplied with electric power.

すなわち、前述と同様に、車両Ｖｅの走行中の振動によって電動機４Ｌ，４Ｒのいずれか一方が故障したことが故障検出手段によって検出されると、蓄電装置とモータＥＣＵとの間に介在されているＢ接点式電磁継電器９に電流が印加され、接点１０が開かれて、電力供給が電気的もしくは機械的に遮断される。その結果、モータＥＣＵが作動せず、また回路６Ｌ，６Ｒにも電力が供給されないので電動機４Ｌ，４Ｒの両方が駆動トルクを発生せず、車両Ｖｅの挙動変化を抑えることができる。   That is, as described above, when the failure detecting means detects that one of the electric motors 4L and 4R has failed due to vibration during traveling of the vehicle Ve, it is interposed between the power storage device and the motor ECU. A current is applied to the B-contact type electromagnetic relay 9, the contact 10 is opened, and the power supply is cut off electrically or mechanically. As a result, since the motor ECU does not operate and no power is supplied to the circuits 6L and 6R, both the motors 4L and 4R do not generate driving torque, and the behavior change of the vehicle Ve can be suppressed.

また、悪路などで瞬断が断続的に生じる場合にも、前述と同様にＢ接点式電磁継電器９に電流が印加され、接点１０が開かれて、モータＥＣＵに対する電力供給が電気的もしくは機械的に遮断される。その結果、回路６Ｌ，６Ｒにも電力が供給されないので瞬断による電動機４Ｌ，４Ｒの駆動可能状態と駆動不能状態とが断続的に継続されることを回避でき、またいわゆる制御のハンチングを回避でき、車両Ｖｅの挙動を安定に保つことができる。   Further, even when a momentary interruption occurs intermittently on a rough road or the like, a current is applied to the B-contact type electromagnetic relay 9 as described above, and the contact 10 is opened to supply electric power to the motor ECU electrically or mechanically. Is blocked. As a result, since no power is supplied to the circuits 6L and 6R, it is possible to avoid the intermittent drive between the drivable state and the drivable state of the motors 4L and 4R, and so-called control hunting can be avoided. The behavior of the vehicle Ve can be kept stable.

なお、電力供給遮断機構７は、要は電力の供給を遮断できる構成であればよく、開閉器としてのスイッチおよびブレーカーなどを用いることもできる。   The power supply cutoff mechanism 7 may be any configuration that can cut off the supply of power, and a switch, a breaker, or the like as a switch can be used.

この発明で対象とする車両を模式的に示す図である。It is a figure which shows typically the vehicle made into object by this invention. この発明における電力供給遮断機構の一例を模式的に示す図である。It is a figure which shows typically an example of the electric power supply interruption | blocking mechanism in this invention. この発明における電力供給遮断機構の他の例を模式的に示す図である。It is a figure which shows typically the other example of the electric power supply interruption | blocking mechanism in this invention.

符号の説明Explanation of symbols

４Ｌ，４Ｒ…電動機、 ５…インバータ、 ６Ｌ，６Ｒ…回路、 ７…電力供給遮断機構。   4L, 4R ... electric motor, 5 ... inverter, 6L, 6R ... circuit, 7 ... power supply cutoff mechanism.

Claims (1)

車両における複数の車輪のうち少なくとも左右二輪に個別に設けられ、かつ供給される電力の増減にともなって駆動トルクが増減される電動機の駆動力制御装置において、
前記電動機に対する電力供給の瞬断を含む前記電動機の故障を検出する故障検出手段と、
前記故障検出手段によって前記電動機のいずれか一方に故障が検出された場合に、前記左右の電動機の両方に対する前記電力の供給を電気的もしくは機械的に遮断する電力供給遮断機構と
を備えていることを特徴とする駆動力制御装置。 In a driving force control device for an electric motor that is individually provided on at least two left and right wheels of a plurality of wheels in a vehicle, and the driving torque is increased or decreased in accordance with an increase or decrease in supplied power,
Failure detection means for detecting a failure of the motor including a momentary interruption of power supply to the motor;
A power supply shut-off mechanism for electrically or mechanically shutting off the supply of power to both the left and right motors when a failure is detected in one of the motors by the failure detection means; A driving force control device.
JP2008274111A 2008-10-24 2008-10-24 Driving force controller Pending JP2010104163A (en)

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Cited By (1)

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