WO2012017935A1 - 車両の後部保護構造 - Google Patents

車両の後部保護構造 Download PDF

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Publication number
WO2012017935A1
WO2012017935A1 PCT/JP2011/067413 JP2011067413W WO2012017935A1 WO 2012017935 A1 WO2012017935 A1 WO 2012017935A1 JP 2011067413 W JP2011067413 W JP 2011067413W WO 2012017935 A1 WO2012017935 A1 WO 2012017935A1
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WO
WIPO (PCT)
Prior art keywords
wheel drive
drive motor
rear wheel
vehicle
motor
Prior art date
Application number
PCT/JP2011/067413
Other languages
English (en)
French (fr)
Inventor
鈴木　彰
新名　祐三
佳弘 坂口
Original Assignee
三菱自動車工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱自動車工業株式会社 filed Critical 三菱自動車工業株式会社
Priority to CN201180038020.2A priority Critical patent/CN103052520B/zh
Priority to EP11814561.4A priority patent/EP2602140B1/en
Priority to US13/806,678 priority patent/US8776920B2/en
Priority to JP2012527708A priority patent/JP5656032B2/ja
Publication of WO2012017935A1 publication Critical patent/WO2012017935A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
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    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
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    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
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    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
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    • B60K15/063—Arrangement of tanks
    • B60K2015/0633—Arrangement of tanks the fuel tank is arranged below the rear seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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Definitions

  • the present invention relates to a rear structure of a vehicle, and relates to a technology for protecting a rear wheel drive motor and a fuel tank when a rear collision is made.
  • a motor As a traveling drive source, there are known vehicles in which a rear wheel is driven by a motor, such as a rear wheel drive vehicle or a four wheel drive vehicle.
  • a motor In such vehicles, in order to make the power transmission mechanism compact, a motor is generally disposed between the left and right rear wheels. Also, the motor is often disposed below the luggage compartment, and the motor is set to be disposed as low as possible in order to secure the space of the luggage compartment.
  • the present invention has been made to solve such a problem, and in a vehicle including an engine and driving a rear wheel with a motor, protection of the motor and a fuel tank is achieved when the vehicle is impacted from behind. It is intended to provide a possible vehicle rear protection structure.
  • the invention according to claim 1 includes an engine and a rear wheel drive motor as a travel drive source of the vehicle, and the rear wheel drive motor is disposed between the left and right rear wheels of the vehicle.
  • the rear wheel drive motor and the power supply line connected to the rear wheel drive motor are disposed in the space surrounded by the suspension member.
  • the power supply line is connected to the rear wheel drive motor on the opposite side to the fuel tank via the rear wheel drive motor.
  • the rear wheel drive motor is supplied with power from the control unit for controlling the drive of the rear wheel drive motor via the power supply line, and the control unit is the rear wheel drive motor.
  • the power supply line is disposed at the upper side, and is connected to the control unit in the space surrounded by the suspension member.
  • the vehicle since the rear wheel drive motor and the power supply line connected thereto are disposed in the space surrounded by the suspension members formed in a well-gage shape, the vehicle is viewed from the rear. In the event of a rear end collision or a side collision near the rear wheel, the rear wheel drive motor and the power supply line are protected by the relatively rigid suspension member.
  • movement of the rear wheel drive motor supported by the suspension member is suppressed when a rear end collision occurs, for example, when a fuel tank is disposed in front of the motor, the fuel tank and the rear wheel drive are supported. Contact with the motor and the power supply line can be avoided, and protection of the fuel tank can be achieved.
  • the power supply line connected to the rear wheel drive motor is located on the opposite side to the fuel tank Therefore, the contact between the power supply line and the fuel tank can be reliably avoided.
  • the power supply line is connected to the control unit in the space surrounded by the suspension member, the space including the connection portion with the control unit and the power supply line surrounded by the suspension member It can be disposed inside to prevent the shear failure of the connection portion of the power supply line at the time of a rear end collision or a side collision.
  • FIG. 1 is a rear view showing a structure of a vehicle rear according to an embodiment of the present invention. It is a right side view showing arrangement of a high voltage line concerning an embodiment of the present invention.
  • FIG. 1 is a side view showing the arrangement of devices of a traveling drive system of a vehicle according to an embodiment of the present invention.
  • a vehicle 1 of this embodiment adopting the motor protection structure of the present invention includes an engine 3 for driving front wheels 2a and 2b, a front wheel drive motor 4 and a rear wheel drive motor 5 It is a four-wheel drive hybrid vehicle.
  • a generator 6 driven by the engine 3, the front wheel drive motor 4 and the engine 3 is provided between the left and right front wheels 2a and 2b of the vehicle. Further, above the front wheel drive motor 4, a front motor control unit 7 is provided which controls the front wheel drive motor 4.
  • a rear wheel drive motor 5 is provided between the left and right rear wheels 10a and 10b of the vehicle 1. The rear wheel drive motor 5 is integrally formed with the reduction gear 5 a, and can drive the left and right rear wheels 10 a and 10 b via the drive shaft 11.
  • a rear motor control unit 12 for operating and controlling the rear wheel drive motor is provided above the rear wheel drive motor 5.
  • a motor drive battery 15 is provided as a power source of the front wheel drive motor 4 and the rear wheel drive motor 5.
  • the motor drive battery 15 is connected to the front wheel drive motor 4 via the front motor control unit 7 and is connected to the rear wheel drive motor 5 via the rear motor control unit 12.
  • the front motor control unit 7 and the rear motor control unit 12 are respectively constituted by an inverter, a charger, a DC-DC converter, etc., and boost the power supplied from the motor drive battery 15 to drive the front wheel drive motor 4 and
  • the power is supplied to the rear wheel drive motor 5 to control the operation of the motors 4 and 5, and when the vehicle is decelerated, the front drive motor 4 and the rear drive motor 5 regenerate electric power to charge the motor drive battery 15. It is possible configuration. Further, the motor drive battery 15 can be charged by the electric power generated by the generator 6 driven by the engine 3.
  • FIG. 2 is a plan view
  • FIG. 3 is a rear view
  • FIG. 4 is a side view showing the arrangement of the high voltage line 40.
  • the rear suspension 19 of the vehicle 1 includes a suspension member 21 supported by a vehicle body via a rubber bush 20, upper links 22a and 22b, lower links 23a and 23b, and a tray.
  • This multilink suspension is provided with ring arms 24a and 24b, toe control links 25a and 25b, coil springs 26a and 26b provided between the vehicle body and lower links 23a and 23b, and dampers 27a and 27b.
  • the suspension members 21 supporting the links 22a, 22b, 23a, 23b, 25a, 25b are mutually spaced apart in the left-right direction of the vehicle, and left and right side members 30a, 30b extending in the longitudinal direction of the vehicle and the left and right side members 30a. , 30b are connected by a first rear cross member 31 extending in the lateral direction of the vehicle, and a second rear cross member 32 connecting the rear portions of the left and right side members 30a, 30b and extending in the lateral direction of the vehicle
  • These high-rigidity members 30a, 30b, 31, 32 are formed in a cross-girder shape. Inside the suspension member 21, a space 33 surrounded by the left and right side members 30a and 30b, the first rear cross member 31 and the second rear cross member 32 is formed.
  • the suspension member 21 supports the rear wheel drive motor 5. Specifically, the second rear cross member 32 of the suspension member 21 is disposed below the rear wheel drive motor 5 and supports the rear lower portion of the rear wheel drive motor 5.
  • the first rear cross member 31 of the suspension member 21 stands upright in front of the rear wheel drive motor 5 so as to divide between the rear wheel drive motor 5 and the fuel tank 17 and extends in the vehicle left-right direction And supports the front portion of the rear wheel drive motor 5.
  • the rear motor control unit 12 for supplying and controlling drive power to the rear wheel drive motor 5 has a substantially rectangular parallelepiped shape, and is disposed to extend above the left and right side members 30a and 30b in the vehicle left and right direction.
  • the high voltage lines 40 power supply lines for supplying power from the rear motor control unit 12 to the rear wheel drive motor are all disposed in the space 33 surrounded by the suspension members 21.
  • the high voltage line 40 is a space 33 surrounded by the left and right side members 30a, 30b, the first rear cross member 31, and the second rear cross member 32, including the connecting portions 40a, 40b at both ends thereof. It is located inside.
  • a connection portion 40 a between the high voltage line 40 and the rear motor control unit 12 is provided between the rear wheel drive motor 5 and the right side member 30 b and on the lower surface of the rear motor control unit 12.
  • the connection portion 40b between the high voltage line 40 and the rear wheel drive motor 5 is provided on the rear surface of the rear wheel drive motor 40, and is connected in front of the rear end surface 32a of the second rear cross member 32.
  • the high voltage line 40 extends from the connecting portion 40b with the rear wheel drive motor 5 to the rear of the rear wheel drive motor 5 and in front of the rear end surface 32a of the second rear cross member 32 in the vehicle right direction. It extends upward and forward between the motor 5 and the right side member 30 b and is connected to the rear motor control unit 12.
  • the rear wheel drive motor 5 is disposed in the space 33 surrounded by the highly rigid suspension member 21. Therefore, the rear wheel drive motor 5 is pushed from behind to the following vehicle or near the rear wheel Damage to the rear wheel drive motor 5 can be prevented when a side collision occurs.
  • the first rear cross member 31 is disposed so as to partition between the rear wheel drive motor 5 and the fuel tank 17 which are disposed side by side in the vehicle longitudinal direction, the rear wheel drive motor is compared with Even if 5 is pushed forward, contact with the fuel tank 17 is avoided by the first rear cross member 31, and damage to the fuel tank 17 can be prevented.
  • the high voltage line 40 connecting the rear motor control unit 12 and the rear wheel drive motor 5 is also disposed in the space 33 surrounded by the highly rigid suspension member 21. Damage to the high voltage line 40 can also be prevented. Furthermore, since high voltage line 40 is connected to the rear of rear wheel drive motor 5 opposite to fuel tank 17, rear wheel drive motor 5 moves forward while high voltage line 40 moves, for example, during a rear-end collision. Even if it is damaged and exposed, the high voltage line 40 is difficult to contact the fuel tank 5 directly, and the fuel in the fuel tank 17 is not easily ignited.
  • connection portion 40a between the high voltage line 40 and the rear motor control unit 12 is also disposed in the space 33 surrounded by the suspension member 21 together with the high voltage line 40. Shear failure can be prevented.
  • the fuel tank 17 is disposed in front of the rear wheel drive motor 5, but the present invention can also be applied to a vehicle in which the fuel tank 17 is disposed behind the rear wheel drive motor 5.
  • the present invention is applied to a vehicle provided with the multilink type rear suspension 19, but in the case of a vehicle in which a space surrounded by highly rigid members is formed in the rear suspension, The present invention is applicable. Further, in the present embodiment, the present invention is applied to a four-wheel drive hybrid vehicle using the front wheel drive motor 4 and the rear wheel drive motor 5, but the present invention is not limited to this. The present invention can be applied to a vehicle in which a rear wheel drive motor and an engine are arranged in the longitudinal direction of the vehicle, such as a hybrid vehicle driven by a wheel only motor.

Abstract

　車両の走行駆動源としてエンジン及び後輪駆動用モータ５を備え、後輪駆動用モータ５が車両の左右後輪１０ａ、１０ｂの間に配置されるとともに、エンジンの燃料タンク１７と後輪駆動用モータ５とが車両前後方向に並べて配置された車両の後部保護構造であって、後輪駆動用モータ５を支持するリヤサスペンション１９のサスペンションメンバ２１が井桁状に形成されており、後輪駆動用モータ５及び当該後輪駆動用モータ５に接続されている高電圧線４０を、サスペンションメンバ２１に囲まれた空間３３内に配置する。

Description

車両の後部保護構造
　本発明は、車両の後部構造に関し、後方から追突されたときに後輪駆動用モータ及び燃料タンクの保護を図る技術に関する。
　走行駆動源としてモータを搭載した車両において、後輪駆動車あるいは４輪駆動車のように、後輪をモータにて駆動する車両が知られている。このような車両では、動力伝達機構をコンパクト化するため、左右後輪の間にモータが配置されることが一般的である。また、モータは、荷室の下方に配置されることが多く、荷室のスペースを確保するためにモータはできるだけ低い位置に配置されるよう設定されている。
　更に、ハイブリッド車のように駆動源としてモータの他にエンジンを備えた車両も開発されている。このようにエンジンを備えた車両、特に乗用車では、車室を確保するため、通常、エンジンの燃料タンクが後部座席の下方に配置されている。したがって、モータにて後輪駆動するハイブリッド車では、モータの前方に燃料タンクが配置されることが、スペース上有効であり、モータと燃料タンクが車両前後方向に並んで配置されるレイアウトのハイブリッド車が公知となっている(特許文献１を参照)。
特開２００８－１９５２５９号公報
　上記特許文献１のように、左右後輪の間にモータを備え、かつモータの前方に燃料タンクを配置した車両では、後方から追突された場合、モータが前方に押し出されて燃料タンクに接触し破損させる虞がある。
　また、モータには、同モータの駆動を制御するコントロールユニットから駆動電力を供給するための電力供給線が接続されている。したがって、後方から後続車両に追突されてモータが移動した場合に、モータに接続されている電力供給線が切断あるいは破損する虞があり、露出した電力供給線が破損した燃料タンクに接触する虞もある。
　本発明はこのような問題を解決するためになされたもので、エンジンを備えるとともに後輪をモータにて駆動する車両において、後方から追突されたときに、モータ及び燃料タンクの保護を図ることが可能な車両の後部保護構造を提供することを目的とする。
　請求項１に記載の発明は、上記目的を達成するため、車両の走行駆動源としてエンジン及び後輪駆動用モータを備え、後輪駆動用モータが車両の左右後輪の間に配置されるとともに、エンジンの燃料タンクと後輪駆動用モータとが車両前後方向に並べて配置された車両の後部保護構造であって、後輪駆動用モータを支持するリヤサスペンションのサスペンションメンバを井桁状に形成し、後輪駆動用モータ及び当該後輪駆動用モータに接続されている電力供給線を、サスペンションメンバに囲まれた空間内に配置することとした。
　請求項２の記載の発明では、電力供給線は、燃料タンクとは後輪駆動用モータを介して反対側で当該後輪駆動用モータに接続するようにした。
　請求項３の発明では、後輪駆動用モータは、後輪駆動用モータの駆動を制御するコントロールユニットから電力供給線を介して電力が供給されており、コントロールユニットは、後輪駆動用モータの上方に配置されており、電力供給線は、サスペンションメンバに囲まれた空間内でコントロールユニットと接続するようにした。
　請求項１の発明によれば、後輪駆動用モータ及びこれに接続されている電力供給線が、井桁状に形成されたサスペンションメンバに囲まれた空間に配置されているので、車両が後方から追突されたり、後輪付近に側突された場合に、比較的高剛性であるサスペンションメンバによって後輪駆動用モータ及び電力供給線が保護される。また、追突されたときにサスペンションメンバに支持されている後輪駆動用モータの移動が抑制されるので、例えばモータの前方に燃料タンクが配置されている場合には、燃料タンクと後輪駆動用モータ及び電力供給線との接触を回避することができ、燃料タンクの保護を図ることができる。
　請求項２の発明によれば、追突時に例え後輪駆動用モータあるいは燃料タンクが前方に移動したとしても、後輪駆動用モータに接続されている電力供給線が燃料タンクとは反対側に位置しているので、電力供給線と燃料タンクとの接触を確実に回避させることができる。
　請求項３の発明によれば、電力供給線がサスペンションメンバに囲まれた空間内でコントロールユニットと接続しているので、コントロールユニットとの接続部を含み電力供給線がサスペンションメンバに囲まれた空間内に配置され、追突時や側突時にこの電力供給線の接続部の剪断破壊を防止することができる。
本発明の実施形態に係る車両の走行駆動系機器の配置を示す側面図。 本発明の実施形態に係る車両後部の構造を示す平面図。 本発明の実施形態に係る車両後部の構造を示す後面図。 本発明の実施形態に係る高電圧線の配置を示す右側面図である。
　以下、図面に基づき本発明の実施形態について説明する。
　図１は、本発明の実施形態に係る車両の走行駆動系の機器の配置を示す側面図である。
　図１に示すように、本発明のモータ保護構造を採用した本実施形態の車両１は、前輪２ａ、２ｂを駆動するエンジン３と、前輪駆動用モータ４及び後輪駆動用モータ５とを備えた４輪駆動式のハイブリッド車である。
　車両の左右前輪２ａ、２ｂの間には、エンジン３、前輪駆動用モータ４、エンジン３により駆動されて発電するジェネレータ６が備えられている。また、前輪駆動用モータ４の上方には前輪駆動用モータ４を作動制御するフロントモータコントロールユニット７が備えられている。
　車両１の左右後輪１０ａ、１０ｂの間には、後輪駆動用モータ５が備えられている。後輪駆動用モータ５は、減速機５ａと一体化して構成され、ドライブシャフト１１を介して左右後輪１０ａ、１０ｂを駆動可能となっている。後輪駆動用モータ５の上方には後輪駆動用モータを作動制御するリヤモータコントロールユニット１２が備えられている。
　車室１３の床面１４の下方には、前輪駆動用モータ４及び後輪駆動用モータ５の動力源としてのモータ駆動用バッテリ１５が備えられている。モータ駆動用バッテリ１５はフロントモータコントロールユニット７を介して前輪駆動用モータ４に接続されているとともに、リヤモータコントロールユニット１２を介して後輪駆動用モータ５に接続されている。フロントモータコントロールユニット７及びリヤモータコントロールユニット１２は、夫々インバータ、充電器及びＤＣ－ＤＣコンバータ等によって構成されており、モータ駆動用バッテリ１５より供給された電力を昇圧して前輪駆動用モータ４及び後輪駆動用モータ５に供給し、これらのモータ４、５を作動制御するとともに、車両減速時に前輪駆動用モータ４及び後輪駆動用モータ５より電力を回生してモータ駆動用バッテリ１５に充電可能な構成となっている。また、モータ駆動用バッテリ１５は、エンジン３により駆動されたジェネレータ６によって発電した電力により充電可能となっている。
　車両１の後部座席１６の下方には、エンジン３の燃料タンク１７が設けられている。燃料タンク１７は、モータ駆動用バッテリ１５の後方かつ後輪駆動用モータ５の前方に、後輪駆動用モータ５と略同一の高さで配置されている。
　図２、図３は、車両後部の構造、詳しくはリヤサスペンション１９の概略構造を示し、図２は平面図、図３は後面図である。図４は、高電圧線４０の配置を示す側面図である。
　図２～４に示すように、本実施形態では、車両１のリヤサスペンション１９は、車体にラバーブッシュ２０を介して支持されたサスペンションメンバ２１、アッパーリンク２２ａ、２２ｂ、ロアリンク２３ａ、２３ｂ、トレーリングアーム２４ａ、２４ｂ及びトーコントロールリンク２５ａ、２５ｂ、車体とロアリンク２３ａ、２３ｂとの間に設けられたコイルスプリング２６ａ、２６ｂ及びダンパ２７ａ、２７ｂを備えたマルチリンク式サスペンションである。
　各リンク２２ａ、２２ｂ、２３ａ、２３ｂ、２５ａ、２５ｂを支持するサスペンションメンバ２１は、互いに車両左右方向に間隔をおいて車両前後方向に延びる左右のサイドメンバ３０ａ、３０ｂと、当該左右のサイドメンバ３０ａ、３０ｂの前部を接続し車両左右方向に延びる第１のリヤクロスメンバ３１と、左右のサイドメンバ３０ａ、３０ｂの後部を接続し車両左右方向に延びる第２のリヤクロスメンバ３２とにより構成され、これらの高剛性の各メンバ３０ａ、３０ｂ、３１、３２によって井桁状に形成されている。サスペンションメンバ２１の内部には、左右のサイドメンバ３０ａ、３０ｂ、第１のリヤクロスメンバ３１及び第２のリヤクロスメンバ３２に囲まれた空間３３が形成されている。
　サスペンションメンバ２１は、後輪駆動用モータ５を支持している。詳しくは、サスペンションメンバ２１の第２のリヤクロスメンバ３２は、後輪駆動用モータ５の下方に配置され、後輪駆動用モータ５の後側下部を支持している。サスペンションメンバ２１の第１のリヤクロスメンバ３１は、後輪駆動用モータ５と燃料タンク１７との間を仕切るように、後輪駆動用モータ５の前方に立設し車両左右方向に延びて配置されており、後輪駆動用モータ５の前部を支持している。
　後輪駆動用モータ５に駆動電力を供給制御するリヤモータコントロールユニット１２は、略直方体の形状であって、左右のサイドメンバ３０ａ、３０ｂの上方を車両左右方向に延びるように配置されている。リヤモータコントロールユニット１２から後輪駆動用モータへ電力を供給する高電圧線４０（電力供給線）は、全てサスペンションメンバ２１に囲まれた空間３３内に配置されている。詳しくは、高電圧線４０は、その両端の接続部４０ａ、４０ｂを含めて、左右のサイドメンバ３０ａ、３０ｂ、第１のリヤクロスメンバ３１及び第２のリヤクロスメンバ３２により囲まれた空間３３内に配置されている。高電圧線４０とリヤモータコントロールユニット１２との接続部４０ａは、後輪駆動用モータ５と右サイドメンバ３０ｂとの間であってかつリヤモータコントロールユニット１２の下面に設けられている。高電圧線４０と後輪駆動用モータ５との接続部４０ｂは、後輪駆動用モータ４０の後面に設けられており、第２のリヤクロスメンバ３２の後端面３２ａより前方で接続されている。高電圧線４０は、後輪駆動用モータ５との接続部４０ｂから後輪駆動用モータ５の後方かつ第２のリヤクロスメンバ３２の後端面３２ａより前方で車両右方向に延び、後輪駆動用モータ５と右サイドメンバ３０ｂとの間で上方かつ前方に延びてリヤモータコントロールユニット１２に接続されている。
　本実施形態では、上記のように、後輪駆動用モータ５が高剛性のサスペンションメンバ２１に囲まれた空間３３内に配置されているので、後方から後続車両に追突されたり、後輪付近に側突されたりしたときに後輪駆動用モータ５の破損を防止することができる。特に、車両前後方向に並んで配置される後輪駆動用モータ５と燃料タンク１７との間を仕切るように第１のリヤクロスメンバ３１が配置されているので、追突時に例え後輪駆動用モータ５が前方に押し出されたとしても、第１のリヤクロスメンバ３１によって燃料タンク１７への接触が回避され、燃料タンク１７の破損を防止することができる。
　また、リヤモータコントロールユニット１２と後輪駆動用モータ５とを接続する高電圧線４０も、高剛性のサスペンションメンバ２１に囲まれた空間３３内に配置されているので、追突時や側突時に高電圧線４０の破損も防止することができる。
　更に、高電圧線４０は燃料タンク１７とは反対側である後輪駆動用モータ５の後部に接続されているので、例え追突時に後輪駆動用モータ５が前方に移動するとともに高電圧線４０が破損して露出したとしても、燃料タンク５に高電圧線４０が直接は接触し難い構造となり、燃料タンク１７内の燃料に引火し難い構造となる。
　また、高電圧線４０とリヤモータコントロールユニット１２との接続部４０ａも、高電圧線４０とともにサスペンションメンバ２１に囲まれた空間３３内に配置されているので、追突時や側突時に接続部４０ａでの剪断破壊を防止することができる。
　本実施形態では、後輪駆動用モータ５の前方に燃料タンク１７が配置されているが、後輪駆動用モータ５の後方に燃料タンク１７が配置されている車両にも適用可能である。
　また、本実施形態では、マルチリンク式のリヤサスペンション１９を備えた車両に本発明を適用しているが、リヤサスペンションに高剛性のメンバで囲まれた空間が形成されている車両であれば、本発明を適用可能である。
　また、本実施形態では、前輪駆動用モータ４及び後輪駆動用モータ５による４輪駆動式のハイブリッド車に本発明を適用しているが、本発明はこれに限定するものでなく、例えば後輪のみモータで駆動するハイブリッド車等、後輪駆動用モータとエンジンとを車両前後方向に並べて配置した車両に適用することができる。
　　１　車両
　　５　後輪駆動用モータ
　　１２　リヤモータコントロールユニット
　　１７　燃料タンク
　　１９　リヤサスペンション
　　２１　サスペンションメンバ
　　３１　第１のリヤクロスメンバ
　　３２　第２のリヤクロスメンバ
　　４０　高電圧線
　　４０ａ、４０ｂ　接続部

Claims (3)

  1. 　車両の走行駆動源としてエンジン及び後輪駆動用モータを備え、前記後輪駆動用モータが前記車両の左右後輪の間に配置されるとともに、前記エンジンの燃料タンクと前記後輪駆動用モータとが車両前後方向に並べて配置された車両の後部保護構造であって、
    　前記後輪駆動用モータを支持するリヤサスペンションのサスペンションメンバが井桁状に形成されており、
    　前記後輪駆動用モータ及び当該後輪駆動用モータに接続されている電力供給線が、前記サスペンションメンバに囲まれた空間内に配置されていることを特徴とする車両の後部保護構造。
  2. 　前記電力供給線は、前記燃料タンクとは前記後輪駆動用モータを介して反対側で当該後輪駆動用モータに接続されていることを特徴とする請求項１に記載の車両の後部保護構造。
  3. 　前記後輪駆動用モータは、当該後輪駆動用モータの駆動を制御するコントロールユニットから前記電力供給線を介して電力が供給されており、
    　前記コントロールユニットは、前記後輪駆動用モータの上方に配置されており、
    　前記電力供給線は、前記サスペンションメンバに囲まれた空間内で前記コントロールユニットと接続されていることを特徴とする請求項１または２に記載の車両の後部保護構造。
PCT/JP2011/067413 2010-08-03 2011-07-29 車両の後部保護構造 WO2012017935A1 (ja)

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