JP2005263036A - Pedestrian protecting device - Google Patents

Pedestrian protecting device Download PDF

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Publication number
JP2005263036A
JP2005263036A JP2004078954A JP2004078954A JP2005263036A JP 2005263036 A JP2005263036 A JP 2005263036A JP 2004078954 A JP2004078954 A JP 2004078954A JP 2004078954 A JP2004078954 A JP 2004078954A JP 2005263036 A JP2005263036 A JP 2005263036A
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pedestrian
vehicle
hood
shock absorber
protection device
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JP2004078954A
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JP4200440B2 (en
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Koji Otaka
孝治 大高
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Denso Corp
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Denso Corp
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Priority to JP2004078954A priority Critical patent/JP4200440B2/en
Priority to DE102005012357.0A priority patent/DE102005012357B4/en
Priority to CNB2005100559172A priority patent/CN1315675C/en
Publication of JP2005263036A publication Critical patent/JP2005263036A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
    • B60G17/0164—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input mainly during accelerating or braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/22—Braking, stopping
    • B60G2800/222—Braking, stopping during collision
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/91—Suspension Control
    • B60G2800/914—Height Control System
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R21/36—Protecting non-occupants of a vehicle, e.g. pedestrians using airbags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2422/00—Indexing codes relating to the special location or mounting of sensors
    • B60W2422/90—Indexing codes relating to the special location or mounting of sensors on bumper, e.g. collision sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/22—Suspension systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
    • B60W30/085—Taking automatic action to adjust vehicle attitude in preparation for collision, e.g. braking for nose dropping

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Superstructure Of Vehicle (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pedestrian protecting device for improving the safety of a pedestrian in a collision. <P>SOLUTION: This pedestrian protecting device has a pedestrian detecting sensor 1, an arithmetic operation part 2, and a springing-up part 3. The pedestrian protecting device is characterized by having a vehicle height reducing means 5 for reducing the vehicle height of a front part of a vehicle V when springing up a hood BF. This pedestrian protecting device improves the safety of the pedestrian in a collision by reducing the impact force when the pedestrian colliding with the vehicle secondarily collides with the hood of the vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、歩行者保護装置に関し、詳しくは、歩行者が車両に衝突したときに歩行者が受けるダメージを低減する歩行者保護装置に関する。   The present invention relates to a pedestrian protection device, and more particularly to a pedestrian protection device that reduces damage to a pedestrian when the pedestrian collides with a vehicle.

近年、車両において事故時の安全性の向上が図られている。車両の安全性に関して、事故時に車両の搭乗者の安全性を確保するだけでなく、車両が歩行者に衝突したときに歩行者が致命的なダメージを受けないことも求められてきている。   In recent years, safety has been improved in vehicles in the event of an accident. Regarding vehicle safety, not only is it necessary to ensure the safety of the vehicle occupant in the event of an accident, but it has also been required that the pedestrian not be fatally damaged when the vehicle collides with the pedestrian.

車両と歩行者の衝突において守るべき歩行者は、子供から大人、又は老人など様々な体格を有している。そして、より多くの歩行者を救うことが重要であると考えられている。   Pedestrians to be protected in a collision between a vehicle and a pedestrian have various physiques such as children, adults, and elderly people. And it is considered important to save more pedestrians.

歩行者に車両が衝突したときに歩行者に対する保護手段としては、歩行者が車両のボンネットに衝突するときのダメージを低減して、出来る限り傷害値（歩行者が受ける衝撃）を下げる方法が考えられている。   As a protective measure against pedestrians when a vehicle collides with a pedestrian, a method of reducing damage when the pedestrian collides with the vehicle hood and reducing the injury value (impact received by the pedestrian) as much as possible is considered. It has been.

例えば、特許文献１には、歩行者と車両の衝突時にボンネットをリフトアップさせることで車両と衝突した歩行者が受ける二次衝突の衝撃を吸収緩和する歩行者保護装置が開示されている。具体的には、走行中の車両が歩行者と衝突して歩行者が跳ね上げられたときに、跳ね上げられた歩行者がボンネット上面に衝突する（二次衝突）。このとき、ボンネットがリフトアップすることで、二次衝突の衝撃をボンネットが吸収緩和する。これにより、歩行者が受ける二次衝突のダメージを低減できる。この結果、歩行者が事故によりうけるダメージが低減する。   For example, Patent Document 1 discloses a pedestrian protection device that absorbs and reduces the impact of a secondary collision received by a pedestrian that has collided with a vehicle by lifting the hood when the pedestrian collides with the vehicle. Specifically, when a running vehicle collides with a pedestrian and the pedestrian is bounced up, the pedestrian who is bounced up collides with the bonnet upper surface (secondary collision). At this time, when the bonnet is lifted up, the bonnet absorbs and reduces the impact of the secondary collision. Thereby, the damage of the secondary collision which a pedestrian receives can be reduced. As a result, damage to pedestrians due to accidents is reduced.

しかしながら、特許文献１に記載の歩行者保護装置は、歩行者の背丈や車両前部の大きさ等が考慮されていない。この結果、例えば、衝突した歩行者が子供等の低身長者で、車両がＳＵＶ等の車高の高い車両である場合には、衝突した歩行者をボンネット上に誘導する事ができず、歩行者を跳ね飛ばしてしまう危険性が有ると。
特開平１１−２８９９４号公報 However, the pedestrian protection device described in Patent Document 1 does not take into consideration the height of the pedestrian, the size of the front portion of the vehicle, or the like. As a result, for example, when the colliding pedestrian is a short stature such as a child and the vehicle is a high vehicle such as an SUV, the colliding pedestrian cannot be guided onto the hood, and the walking There is a risk of jumping off the person.
JP-A-11-28994

本発明は上記実状に鑑みてなされたものであり、衝突時の歩行者の安全性を向上させる歩行者保護装置を提供することを課題とする。   This invention is made | formed in view of the said actual condition, and makes it a subject to provide the pedestrian protection apparatus which improves the safety | security of the pedestrian at the time of a collision.

本発明は上記実状に鑑みてなされたものであり、車両が歩行者に衝突したときの安全性について検討を重ねた結果本発明をなすに至った。本発明の歩行者保護装置は、車両が歩行者に衝突したときに車両の前部の車高を低減して歩行者を車両のボンネット上に誘導することで上記課題を解決している。   This invention is made | formed in view of the said actual condition, As a result of examining repeatedly about the safety when a vehicle collides with a pedestrian, it came to make this invention. The pedestrian protection device of the present invention solves the above problems by reducing the height of the front part of the vehicle and guiding the pedestrian onto the hood of the vehicle when the vehicle collides with the pedestrian.

すなわち、本発明の歩行者保護装置は、車両の前面部に配設され歩行者の衝突を検知する歩行者検知センサと、歩行者検知センサの出力信号が入力され、歩行者の衝突の判断を行い歩行者衝突信号を発する演算部と、歩行者衝突信号が入力されたときにボンネットを跳ね上げる跳ね上げ部と、を有する歩行者保護装置であって、ボンネットの跳ね上げが行われるときに、車両の前部の車高を低減させる車高低減手段を有することを特徴とする。なお、本発明の歩行者保護装置は、車両の正面が歩行者に衝突したときの歩行者の安全性を向上させる。また、車両のボンネットとは、車両において乗員が搭乗する車室より前部のエンジンルームあるいは前部のトランクルームを覆う部材である。   That is, the pedestrian protection device of the present invention is provided with a pedestrian detection sensor that is disposed on the front surface of the vehicle and detects a pedestrian collision, and an output signal of the pedestrian detection sensor is input to determine a pedestrian collision. A pedestrian protection device having a calculation unit that performs a pedestrian collision signal and a flip-up unit that flips up the bonnet when the pedestrian collision signal is input, and when the bonnet is flipped up, Vehicle height reducing means for reducing the vehicle height at the front of the vehicle is provided. In addition, the pedestrian protection device of the present invention improves pedestrian safety when the front of the vehicle collides with a pedestrian. The vehicle bonnet is a member that covers the engine room or the trunk room in the front of the passenger compartment in the vehicle.

本発明の歩行者保護装置は、歩行者と車両が衝突したときに、跳ね上げ部によりボンネットが跳ね上げられ（リフトアップ）する。ボンネットがリフトアップすることで、ボンネットの下のエンジン等の部材とボンネットの距離が長くなり、歩行者がボンネットに倒れ込んでボンネットが変形を生じて沈み込んだときに歩行者がこのエンジン等の部材に当たらなくなる。さらに、ボンネットの下のエンジン等の部材とボンネットまでの距離が伸びたことでボンネットが大きく変形できる。すなわち、リフトアップしたボンネットの変形量が大きくなることで、ボンネットが吸収する衝撃が大きくなる。この結果、ボンネット上に倒れ込んだ歩行者の受ける衝撃は、ボンネットが変形することで吸収するため低減する。このように、跳ね上げ部を有することで、歩行者の安全性が確保される。   In the pedestrian protection device of the present invention, when the pedestrian and the vehicle collide, the hood is lifted (lifted up) by the flip-up unit. When the hood is lifted up, the distance between the engine and other parts under the hood and the hood becomes longer, and when the pedestrian falls into the hood and the bonnet deforms and sinks, the pedestrian becomes a member of the engine. If it hits, it will disappear. Furthermore, the hood can be greatly deformed by extending the distance between the engine and other members under the hood and the hood. That is, as the amount of deformation of the lifted bonnet increases, the impact absorbed by the bonnet increases. As a result, the impact received by the pedestrian who has fallen on the hood is reduced because it is absorbed by the deformation of the hood. Thus, the safety of a pedestrian is ensured by having a flip-up part.

そして、本発明の歩行者保護装置は、車高低減手段が、ボンネットの跳ね上げが行われるときに車両の前部の車高を低減させる。この車両の前部の車高が低減することで、車両が衝突した歩行者が倒れ込む方向をボンネット方向とすることができる。すなわち、歩行者をボンネットの誘導する。ボンネットは、上記したように跳ね上げ部により歩行者に対する安全性が確保されている。ボンネット上に歩行者を誘導することで、本発明の歩行者保護装置は、歩行者の衝撃を低減する。   In the pedestrian protection device of the present invention, the vehicle height reducing means reduces the vehicle height at the front of the vehicle when the hood is flipped up. By reducing the vehicle height at the front portion of the vehicle, the direction in which the pedestrian who collides with the vehicle falls can be set as the bonnet direction. That is, the bonnet is guided to the pedestrian. As described above, the bonnet is secured to the pedestrian by the flip-up part. By guiding the pedestrian on the hood, the pedestrian protection device of the present invention reduces the impact of the pedestrian.

さらに、歩行者が車両と衝突して上方に跳ね上げられたときには、車両の前部の車高が低減しているとともに車両自身に働いている慣性力により、車両の前部が跳ね上げた歩行者の下に侵入することとなる。そして、跳ね上げられた歩行者がボンネット上に落下する。ボンネットは跳ね上げ部によりリフトアップしている。ボンネット上に落下した歩行者の受ける衝撃は、リフトアップしたボンネットが吸収緩和している。すなわち、本発明の歩行者保護装置は、車両に衝突した歩行者の安全性が向上している。   Further, when the pedestrian collides with the vehicle and is flipped up, the vehicle height at the front part of the vehicle is reduced and the front part of the vehicle jumps up due to the inertial force acting on the vehicle itself. Will invade under the person. And the pedestrian who jumped up falls on the hood. The bonnet is lifted up by the flip-up part. The impact of pedestrians falling on the bonnet is absorbed and relaxed by the lifted bonnet. That is, the pedestrian protection device of the present invention improves the safety of pedestrians that collide with the vehicle.

すなわち、本発明の歩行者保護装置は、車両の前部の車高を低下させることで、車両と衝突した歩行者の二次衝突の衝撃が低減されている。また、本発明の歩行者保護装置は、車両の前部の車高を低減して歩行者をボンネット上に誘導するため、ＲＶ車やＳＵＶ車のような車高の高い車両における歩行者の保護に特に効果を発揮する。   That is, the pedestrian protection device of the present invention reduces the impact of a secondary collision of a pedestrian that has collided with the vehicle by reducing the height of the front portion of the vehicle. In addition, the pedestrian protection device according to the present invention reduces the height of the front part of the vehicle and guides the pedestrian onto the hood, so that the pedestrian is protected in a vehicle with a high height such as an RV vehicle or an SUV vehicle. Especially effective.

本発明の歩行者保護装置において、車両の前部の車高を低下させる方法は、特に限定されるものではない。たとえば、車両のサスペンションのダンパー機構を取り外す方法、タイヤの空気圧を減らす方法、サスペンションのショックアブソーバーを圧縮する方法等の方法をあげることができる。   In the pedestrian protection apparatus of the present invention, the method for reducing the vehicle height at the front of the vehicle is not particularly limited. For example, a method of removing a damper mechanism of a vehicle suspension, a method of reducing tire air pressure, a method of compressing a shock absorber of a suspension, and the like can be given.

本発明の歩行者保護装置は、車高低減手段は、車両の前部のショックアブソーバーを圧縮することが好ましい。車両の前部にもうけられたショックアブソーバーを圧縮することで車両の前部の車高を低減できる。ショックアブソーバーの圧縮は、ショックアブソーバーの伸縮する方向に圧縮する。車両の前部とは、車両の進行方向における前部であり、通常は、車両の運転席より前方を示す。そして、車両の前部のショックアブソーバーとしては、車両のフロントサスペンションのショックアブソーバーを示す。また、この車高低減手段は、ショックアブソーバーの機能を損傷させることなく車高を低下させることができる。すなわち、その後の車両の走行に影響を与えない。   In the pedestrian protection device of the present invention, it is preferable that the vehicle height reducing means compresses a shock absorber at the front of the vehicle. The vehicle height at the front of the vehicle can be reduced by compressing the shock absorber provided at the front of the vehicle. The shock absorber is compressed in the direction in which the shock absorber expands and contracts. The front part of the vehicle is a front part in the traveling direction of the vehicle, and usually indicates the front of the driver's seat of the vehicle. A shock absorber for the front suspension of the vehicle is shown as the shock absorber at the front of the vehicle. In addition, the vehicle height reducing means can reduce the vehicle height without damaging the function of the shock absorber. That is, it does not affect the subsequent driving of the vehicle.

本発明の歩行者保護装置において、車両の前部のショックアブソーバーを圧縮する方法は、特に限定されるものではない。たとえば、エアーサスペンションのエアーを抜く方法、バネスプリングを強制的に圧縮する方法等の方法をあげることができる。   In the pedestrian protection device of the present invention, the method for compressing the shock absorber at the front of the vehicle is not particularly limited. For example, a method of drawing air from the air suspension, a method of forcibly compressing a spring spring, or the like can be given.

車高低減手段は、ショックアブソーバーと略平行に配設され、歩行者衝突信号が入力されたときに上下方向にのびる油圧シリンダと、一端がショックアブソーバーの上部に接続され他端が油圧シリンダの下方の端部に接続されたアッパーアームと、一端がショックアブソーバーの下部に接続され他端が油圧シリンダの上方の端部に接続されたロアーアームと、を有することが好ましい。この車高低減手段は、歩行者衝突信号が入力されたときに油圧シリンダがのび、この油圧シリンダののびがアッパーアームおよびロアーアームを介してショックアブソーバーの圧縮力として伝達され、ショックアブソーバー（およびバネスプリング）が強制的に圧縮される。ショックアブソーバーが圧縮されると車両の前部の車高が低減する。また、この車高低減手段は、油圧シリンダを短縮させるとショックアブソーバーがのびて車高が元に戻る。その後、衝突事故前と同様にショックアブソーバーが機能する。すなわち、ショックアブソーバー自体を損傷させることなく車高を調節できる効果を持つ。   The vehicle height reducing means is disposed substantially parallel to the shock absorber, and extends vertically when a pedestrian collision signal is input, and one end is connected to the upper part of the shock absorber and the other end is below the hydraulic cylinder. Preferably, the upper arm is connected to the lower end of the hydraulic cylinder, and the lower arm is connected to the lower end of the shock absorber and the other end is connected to the upper end of the hydraulic cylinder. This vehicle height reduction means is such that when a pedestrian collision signal is input, the hydraulic cylinder extends, and the expansion of this hydraulic cylinder is transmitted as the compression force of the shock absorber via the upper arm and lower arm, and the shock absorber (and spring spring) ) Is forcibly compressed. When the shock absorber is compressed, the vehicle height at the front of the vehicle is reduced. In addition, when the hydraulic cylinder is shortened, the vehicle height reducing means extends the shock absorber and restores the vehicle height. After that, the shock absorber functions as before the collision accident. That is, the vehicle height can be adjusted without damaging the shock absorber itself.

本発明の歩行者保護手段は、フロントピラーにもうけられ歩行者衝突信号が入力されたときにボンネット上および／または少なくともウィンドシールドの下部もしくはＡピラー部に展開するエアバックを有することが好ましい。   The pedestrian protection means of the present invention preferably has an airbag that is provided on the front pillar and that develops on the hood and / or at least the lower part of the windshield or the A pillar when a pedestrian collision signal is input.

本発明の歩行者保護手段は、歩行者と車両が衝突したときに車両の前部にエアバックが展開する。車両の前部にエアバックが展開することで、ボンネット上に倒れ込んだ歩行者の頭部がボンネットあるいはウィンドシールドもしくはＡピラー部に衝突するときの衝撃が緩和される。すなわち、本発明の歩行者保護装置は、車両に衝突した歩行者に対する安全性が向上している。   In the pedestrian protection means of the present invention, when the pedestrian and the vehicle collide, the airbag is deployed at the front portion of the vehicle. By deploying the airbag at the front part of the vehicle, the impact when the head of a pedestrian who has fallen on the bonnet collides with the bonnet, the windshield, or the A-pillar part is alleviated. That is, the pedestrian protection device of the present invention has improved safety for pedestrians that collide with the vehicle.

本発明の歩行者保護装置は、歩行者に車両が衝突したときに車高低減手段で車両の前部の車高を低下させたときに車両の後部の車高については特に限定されるものではない。すなわち、車両の後部の車高を下げても、車両の後部の車高を変化させなくても、車両の後部の車高を上げてもいずれでもよい。   The pedestrian protection device of the present invention is not particularly limited with respect to the vehicle height at the rear of the vehicle when the vehicle height reduction means lowers the vehicle height at the front of the vehicle when the vehicle collides with a pedestrian. Absent. That is, the vehicle height at the rear part of the vehicle may be lowered, the vehicle height at the rear part of the vehicle may not be changed, or the vehicle height at the rear part of the vehicle may be raised.

たとえば、車両の後部の車高を下げると、車両全体の車高が下がる。車両全体の重心位置が低下する。すなわち、歩行者に衝突した直後の車両の操縦の安定性が保たれる。   For example, when the vehicle height at the rear of the vehicle is lowered, the vehicle height of the entire vehicle is lowered. The center of gravity position of the entire vehicle is lowered. That is, the stability of the vehicle operation immediately after the collision with the pedestrian is maintained.

また、車両の後部の車高を変化させないあるいは車高を上げると、車両全体が前傾姿勢となる。ボンネットの車室側が高くなるため、ボンネットに倒れ込む歩行者の頭部近傍が短い時間（あるいは距離）でボンネットに衝突するようになる。すなわち、ボンネットに衝突するときの歩行者の運動エネルギーを小さくでき、これにより歩行者に与えられる衝撃を低減できる。   Further, if the vehicle height at the rear part of the vehicle is not changed or the vehicle height is raised, the entire vehicle assumes a forward leaning posture. Since the vehicle compartment side of the bonnet becomes high, the vicinity of the head of the pedestrian who falls into the bonnet collides with the bonnet in a short time (or distance). That is, the kinetic energy of the pedestrian when colliding with the bonnet can be reduced, thereby reducing the impact given to the pedestrian.

本発明の歩行者保護装置は、車両と衝突した歩行者が車両のボンネットと二次衝突するときの衝撃力を低減する。すなわち、本発明の歩行者保護装置は、車両と歩行者の衝突時に歩行者に対する安全性が向上している。   The pedestrian protection device of the present invention reduces the impact force when a pedestrian that collides with a vehicle has a secondary collision with the hood of the vehicle. That is, the pedestrian protection device of the present invention has improved safety for pedestrians when the vehicle collides with the pedestrian.

以下、本発明を具体的な実施例に基づいて説明する。   Hereinafter, the present invention will be described based on specific examples.

図１は、本実施例の歩行者保護装置の構成を示した図である。本実施例の歩行者保護装置は、車両Ｖ、車両バンパーＢ、歩行者検知センサ１、演算手段２、跳ね上げ部３、エアバック４、車高調節手段５、ホイールＷ、を有する。   FIG. 1 is a diagram illustrating the configuration of the pedestrian protection device according to the present embodiment. The pedestrian protection apparatus according to the present embodiment includes a vehicle V, a vehicle bumper B, a pedestrian detection sensor 1, a calculation unit 2, a flip-up unit 3, an airbag 4, a vehicle height adjustment unit 5, and a wheel W.

車両Ｖは、本実施例の歩行者保護装置が設置される車両である。車両Ｖは、車室の前部にエンジンルームＥを有する。そして、エンジンルームＥの上面には、エンジンルームＥを覆うようにボンネットＢＦがもうけられている。なお、本実施例の歩行者保護装置を示した図１においては、車両はステーションワゴンタイプであるが、ボンネットを有する車両であればいずれの車両であってもよい。   The vehicle V is a vehicle on which the pedestrian protection device of the present embodiment is installed. The vehicle V has an engine room E in the front part of the passenger compartment. A bonnet BF is provided on the upper surface of the engine room E so as to cover the engine room E. In addition, in FIG. 1 which showed the pedestrian protection apparatus of a present Example, although a vehicle is a station wagon type, as long as it is a vehicle which has a bonnet, any vehicle may be sufficient.

車両バンパーＢは、エンジンルームＥの前面にもうけられている。車両バンパーＢは、歩行者検知センサ１がもうけられている。本実施例においては、車両バンパーＢは、車両Ｖにもうけられたフロントサイドメンバーにバンパーリンフォースが固定され、バンパーリンフォースの前面に歩行者検知センサ１が設置され、さらに、その前面に衝撃を緩和するための発泡樹脂等の弾性部材よりなるアブソーバーがもうけられ、さらに、バンパーカバーがもうけられている。   The vehicle bumper B is provided in front of the engine room E. The vehicle bumper B is provided with a pedestrian detection sensor 1. In the present embodiment, the vehicle bumper B has a bumper reinforcement fixed to a front side member provided in the vehicle V, a pedestrian detection sensor 1 is installed in front of the bumper reinforcement, and an impact is applied to the front. An absorber made of an elastic member such as foamed resin for relaxation is provided, and a bumper cover is provided.

歩行者検知センサ１は、車両の前面部に配設され歩行者の衝突を検知する。歩行者検知センサ１は、歩行者の検知ができるセンサであれば特に限定されるものでなく、従来公知の歩行者検知センサを用いることができる。   The pedestrian detection sensor 1 is disposed on the front portion of the vehicle and detects a pedestrian collision. The pedestrian detection sensor 1 will not be specifically limited if it is a sensor which can detect a pedestrian, A conventionally well-known pedestrian detection sensor can be used.

演算手段２は、歩行者検知センサ１の出力信号が入力され、歩行者の衝突の判断を行い歩行者衝突信号を発する。なお、演算手段２と歩行者検知信号１は、歩行者検知センサ１の出力信号が流れることができる手段で接続されている。すなわち、演算手段２は、歩行者検知センサ１の出力信号から歩行者の衝突を判断する。演算手段２は、従来公知の演算手段を用いることができる。   The calculation means 2 receives the output signal of the pedestrian detection sensor 1, determines the collision of the pedestrian, and issues a pedestrian collision signal. In addition, the calculating means 2 and the pedestrian detection signal 1 are connected by the means through which the output signal of the pedestrian detection sensor 1 can flow. That is, the calculation means 2 determines a pedestrian collision from the output signal of the pedestrian detection sensor 1. As the calculation means 2, a conventionally known calculation means can be used.

跳ね上げ部３は、演算手段２からの歩行者衝突信号が入力されたときにボンネットＢＦを跳ね上げる。なお、演算手段２と跳ね上げ部３は、歩行者衝突信号が流れることができる手段で接続されている。跳ね上げ部３は、ボンネットＢＦを跳ね上げることができる装置であれば特に限定されるものではなく、従来公知の装置を用いることができる。本実施例の歩行者保護装置において、跳ね上げ部３は、歩行者衝突信号が入力されたときにボンネットＢＦの車室側の端部をリフトアップする（跳ね上げる）。   The flip-up unit 3 flips up the hood BF when the pedestrian collision signal from the calculation means 2 is input. Note that the computing means 2 and the flip-up unit 3 are connected by means that allow a pedestrian collision signal to flow. The flip-up unit 3 is not particularly limited as long as it is a device that can flip up the bonnet BF, and a conventionally known device can be used. In the pedestrian protection device of the present embodiment, the flip-up unit 3 lifts up (bounces up) the end of the hood BF on the vehicle compartment side when a pedestrian collision signal is input.

エアバック４は、演算手段２からの歩行者衝突信号が入力されたときにボンネット上および／または少なくともウィンドシールドの下部に展開する。このエアバック４は、フロントピラーにもうけられている。なお、演算手段２とエアバック４は、歩行者衝突信号が流れることができる手段で接続されている。エアバック４は、所定の位置に展開できるエアバックであれば特に限定されるものではなく、従来公知のエアバックを用いることができる。   The air bag 4 develops on the hood and / or at least the lower part of the windshield when a pedestrian collision signal from the computing means 2 is input. The airbag 4 is provided at the front pillar. The computing means 2 and the airbag 4 are connected by means that allow a pedestrian collision signal to flow. The airbag 4 is not particularly limited as long as it can be deployed at a predetermined position, and a conventionally known airbag can be used.

車高調節手段５は、車両のすべてのサスペンション６にもうけられている。車高調節手段５は、取り付けられたサスペンション６のショックアブソーバー６０を伸縮させる。   The vehicle height adjusting means 5 is provided in all suspensions 6 of the vehicle. The vehicle height adjusting means 5 expands and contracts the shock absorber 60 of the attached suspension 6.

本実施例において車高調節手段５が取り付けられたフロントサスペンション６を図２に示した。   The front suspension 6 to which the vehicle height adjusting means 5 is attached in this embodiment is shown in FIG.

フロントサスペンション６は、サスペンションロアーアーム６２とサスペンションアッパーアーム６１とを有するアームに保持されたホイールＷと、下端がサスペンションロアーアーム６２に上端が車両Ｖに接続固定されたショックアブソーバー６３と、ショックアブソーバー６３と同軸的に配設されたコイルスプリング６４と、を有する。   The front suspension 6 includes a wheel W held by an arm having a suspension lower arm 62 and a suspension upper arm 61, a shock absorber 63 having a lower end connected to the suspension lower arm 62 and an upper end connected to the vehicle V, and coaxial with the shock absorber 63. And a coil spring 64 disposed in a regular manner.

フロントサスペンション６に取り付けられた車高調節手段５は、ショックアブソーバ６３と略平行に配設され下方にピストンが突出する油圧シリンダ５０と、一端がショックアブソーバー６３の上部に接続され他端が油圧シリンダ５０のピストンの先端部に接続された略クランク形状を有するアッパーアーム５１と、一端がショックアブソーバー６３の下部に接続され他端が油圧シリンダ５０の上方の端部に接続された略クランク形状を有するロアーアーム５２と、を有する。そして、油圧シリンダ５０は、演算手段２からの歩行者衝突信号が入力されたときにシリンダを突出させる。   The vehicle height adjusting means 5 attached to the front suspension 6 includes a hydraulic cylinder 50 that is disposed substantially in parallel with the shock absorber 63 and has a piston protruding downward, and one end connected to the upper part of the shock absorber 63 and the other end hydraulic cylinder. Upper arm 51 having a substantially crank shape connected to the tip of 50 pistons, and a substantially crank shape having one end connected to the lower part of shock absorber 63 and the other end connected to the upper end of hydraulic cylinder 50 And a lower arm 52. The hydraulic cylinder 50 causes the cylinder to protrude when the pedestrian collision signal from the computing means 2 is input.

この車高調節手段は、油圧シリンダ５０のピストンが突出すると、アッパーアーム５１が下方に変移する。このアッパーアーム５１は、アッパーアーム５１を介してショックアブソーバー６３に伝達される。すなわち、アッパーアーム５１の変移によりショックアブソーバー６３の上方の端部には下方への応力が働き、上方の端部が下方へ変移する。この変移によりショックアブソーバー６３は圧縮される。   In the vehicle height adjusting means, when the piston of the hydraulic cylinder 50 protrudes, the upper arm 51 changes downward. The upper arm 51 is transmitted to the shock absorber 63 via the upper arm 51. That is, due to the change of the upper arm 51, a downward stress acts on the upper end of the shock absorber 63, and the upper end changes downward. By this transition, the shock absorber 63 is compressed.

なお、図２に示されたフロントサスペンション６に取り付けられた車高調節手段５と同様な車高調節手段がリアサスペンションに取り付けられている。   A vehicle height adjusting means similar to the vehicle height adjusting means 5 attached to the front suspension 6 shown in FIG. 2 is attached to the rear suspension.

フロントサスペンション６に取り付けられた車高調節手段５は、油圧シリンダ５０のピストンが突出することで車両の前部の車高を低下させているが、車高調節手段において油圧シリンダ５０のピストンがバレルに引き込むことで、車両の車高を高くすることができる。すなわち、あらかじめピストンが一定量突出した状態で油圧ピストン５を組み込むことで、車高の変化を容易に行うことが可能となる。   The vehicle height adjusting means 5 attached to the front suspension 6 lowers the vehicle height at the front portion of the vehicle by the piston of the hydraulic cylinder 50 protruding, but the piston of the hydraulic cylinder 50 is barreled in the vehicle height adjusting means. By pulling in, the height of the vehicle can be increased. That is, the vehicle height can be easily changed by incorporating the hydraulic piston 5 in a state where the piston protrudes by a certain amount in advance.

本実施例の歩行者保護装置の動作を説明する。本実施例の歩行者保護装置における装置の作動における信号の流れを図３に示した。   The operation of the pedestrian protection device of this embodiment will be described. The signal flow in the operation of the apparatus in the pedestrian protection apparatus of the present embodiment is shown in FIG.

まず、車両Ｖが前面で歩行者と衝突すると、車両Ｖの前面の車両バンパーＢにもうけられた歩行者検知センサ１が歩行者の衝突を検知する。歩行者検知センサ１は、歩行者の衝突を検知すると演算手段２に出力信号を送信する。   First, when the vehicle V collides with a pedestrian on the front, the pedestrian detection sensor 1 provided on the vehicle bumper B on the front of the vehicle V detects the collision of the pedestrian. The pedestrian detection sensor 1 transmits an output signal to the calculation means 2 when detecting a pedestrian collision.

演算手段２は、歩行者検知センサ１から送られてきた出力信号を演算処理し、車両が歩行者に衝突したことを判定する。そして、車両と歩行者の衝突と判定したら、歩行者衝突信号を発する。   The computing means 2 computes the output signal sent from the pedestrian detection sensor 1 and determines that the vehicle has collided with the pedestrian. And if it determines with the collision of a vehicle and a pedestrian, a pedestrian collision signal will be emitted.

演算部２からの歩行者衝突信号は、車高調節手段５、５’に送られる。この歩行者衝突信号は、少なくとも車両Ｖのフロントサスペンションに取り付けられた車高調節手段５に送られる。演算部２からの歩行者衝突信号が入力された車高調節手段５は、油圧シリンダ５０がのびる（バレルからピストンが突出する）。油圧シリンダ５０のピストンが突出すると、アッパーアーム５１が下方に変移する。このアッパーアーム５１は、アッパーアーム５１を介してショックアブソーバー６３に伝達される。すなわち、アッパーアーム５１の変移によりショックアブソーバー６３の上方の端部には下方への応力が働き、上方の端部が下方へ変移する。この変移によりショックアブソーバー６３は圧縮される。ショックアブソーバー６３の圧縮により車両Ｖの前部の車高が低下する。この車高の低下により、車両が衝突した歩行者の足元に車両の前部が当たることとなり、歩行者が車両ＶのボンネットＢＦ上に倒れ込むようになる。   The pedestrian collision signal from the calculation unit 2 is sent to the vehicle height adjusting means 5, 5 '. This pedestrian collision signal is sent to at least the vehicle height adjusting means 5 attached to the front suspension of the vehicle V. In the vehicle height adjusting means 5 to which the pedestrian collision signal from the calculation unit 2 is input, the hydraulic cylinder 50 extends (a piston protrudes from the barrel). When the piston of the hydraulic cylinder 50 protrudes, the upper arm 51 shifts downward. The upper arm 51 is transmitted to the shock absorber 63 via the upper arm 51. That is, due to the change of the upper arm 51, a downward stress acts on the upper end of the shock absorber 63, and the upper end changes downward. By this transition, the shock absorber 63 is compressed. The vehicle height at the front portion of the vehicle V decreases due to the compression of the shock absorber 63. Due to the decrease in the vehicle height, the front part of the vehicle hits the foot of the pedestrian who collided with the vehicle, and the pedestrian falls over the hood BF of the vehicle V.

また、演算部２からの歩行者衝突信号は、跳ね上げ部３に送られる。歩行者衝突信号が入力した跳ね上げ部３は、ボンネットＢＦをリフトアップする。ボンネットＢＦがリフトアップしたことで、ボンネットＢＦとエンジンルームＥ内に配設されたエンジンとの距離が増加する。歩行者がボンネットＢＦに倒れ込んでボンネットＢＦが変形を生じて沈み込んだときにボンネットＢＦを介して歩行者がエンジンに当たらなくなっている。さらに、ボンネットＢＦとエンジンとの距離が伸びたことで、ボンネットＢＦの変形量が多くなる。すなわち、リフトアップしたボンネットＢＦが吸収緩和できる力の量が増加している。すなわち、ボンネットＢＦに倒れ込んだ歩行者の受ける衝撃力が低減されている。   A pedestrian collision signal from the calculation unit 2 is sent to the flip-up unit 3. The flip-up unit 3 to which the pedestrian collision signal is input lifts up the hood BF. Since the hood BF is lifted up, the distance between the hood BF and the engine disposed in the engine room E increases. When the pedestrian falls into the hood BF and the hood BF is deformed and sinks, the pedestrian does not hit the engine through the hood BF. Furthermore, since the distance between the bonnet BF and the engine is increased, the deformation amount of the bonnet BF is increased. That is, the amount of force that can be absorbed and relaxed by the lifted bonnet BF is increasing. That is, the impact force received by the pedestrian who has fallen into the bonnet BF is reduced.

さらに、歩行者が車両Ｖと衝突して略鉛直上方に跳ね上げられたときには、車両Ｖの前部の車高が低減しているとともに車両自身に働いている慣性力により、車両Ｖの前部が跳ね上げた歩行者の下に侵入することとなる。そして、跳ね上げられた歩行者がボンネットＢＦ上に落下する。ボンネットＢＦは跳ね上げ部３によりリフトアップしている。ボンネットＢＦ上に落下した歩行者の受ける衝撃は、リフトアップしたボンネットＢＦが吸収緩和する。   Further, when the pedestrian collides with the vehicle V and is flipped up substantially vertically, the vehicle height at the front of the vehicle V is reduced and the inertial force acting on the vehicle itself causes the front of the vehicle V to move forward. Will intrude under the pedestrian who jumped up. And the pedestrian who jumped up falls on the hood BF. The bonnet BF is lifted up by the flip-up unit 3. The impact received by the pedestrian who has fallen on the hood BF is absorbed and relaxed by the lifted hood BF.

さらに、演算部２からの歩行者衝突信号は、エアバック４に送られる。そして、エアバック４がボンネット上および／または少なくともウィンドシールドの下部もしくはＡピラー部に展開する。車両Ｖの前部にエアバック４が展開することで、ボンネットＢＦ上に倒れ込んだ歩行者の頭部がボンネットＢＦあるいはウィンドシールドあるいはＡピラー部に衝突（二次衝突）するときの衝撃が緩和される。   Further, the pedestrian collision signal from the calculation unit 2 is sent to the airbag 4. And the airbag 4 expand | deploys on a bonnet and / or at least the lower part or A pillar part of a windshield. By deploying the airbag 4 in the front part of the vehicle V, the impact when the head of a pedestrian who has fallen on the hood BF collides with the hood BF, the windshield, or the A pillar (secondary collision) is mitigated. The

上記したように、本実施例の歩行者保護装置は、前部の車高を低下させることで車両が衝突した歩行者をボンネットＢＦ上に誘導している。そして、歩行者が倒れ込むボンネットＢＦは、リフトアップしたことで倒れ込んでくる歩行者への安全性が向上している。さらに、ボンネットＢＦ上にエアバック４が展開することで、さらに歩行者への安全性が向上している。すなわち、本実施例の歩行者保護装置は、車両が衝突した歩行者に対する安全性にすぐれた歩行者保護装置となっている。   As described above, the pedestrian protection device according to the present embodiment guides the pedestrian with which the vehicle has collided on the hood BF by reducing the front vehicle height. And the hood BF in which a pedestrian falls falls, and the safety to the pedestrian who falls down by having lifted up is improving. Further, the airbag 4 is deployed on the hood BF, so that safety for pedestrians is further improved. That is, the pedestrian protection device of the present embodiment is a pedestrian protection device that is excellent in safety with respect to a pedestrian who collides with a vehicle.

実施例の歩行者保護装置の構成を示した図である。It is the figure which showed the structure of the pedestrian protection apparatus of an Example. 実施例の歩行者保護装置がもうけられた車両のフロントサスペンションの構成を示した図である。It is the figure which showed the structure of the front suspension of the vehicle with which the pedestrian protection apparatus of the Example was provided. 実施例の歩行者保護装置の動作の信号の流れを示したフロー図である。It is the flowchart which showed the flow of the signal of the operation | movement of the pedestrian protection apparatus of an Example.

符号の説明Explanation of symbols

１…歩行者検知センサ
２…演算手段
３…跳ね上げ部
４…エアバック
５…車高調節手段 ５０…油圧シリンダ
５１…アッパーアーム ５２…ロアーアーム
６…フロントサスペンション ６１…サスペンションアッパーアーム
６２…サスペンションロアーアーム
６３…ショックアブソーバー ６４…コイルスプリング
Ｖ…車両
Ｂ…車両バンパー
Ｅ…エンジンルーム
ＢＦ…ボンネット
Ｗ…ホイール DESCRIPTION OF SYMBOLS 1 ... Pedestrian detection sensor 2 ... Calculation means 3 ... Bounce-up part 4 ... Air bag 5 ... Vehicle height adjustment means 50 ... Hydraulic cylinder 51 ... Upper arm 52 ... Lower arm 6 ... Front suspension 61 ... Suspension upper arm 62 ... Suspension lower arm 63 ... Shock absorber 64 ... Coil spring V ... Vehicle B ... Vehicle bumper E ... Engine room BF ... Bonnet W ... Wheel

Claims (4)

車両の前面部に配設され歩行者の衝突を検知する歩行者検知センサと、
該歩行者検知センサの出力信号が入力され、該歩行者の衝突の判断を行い歩行者衝突信号を発する演算部と、
該歩行者衝突信号が入力されたときにボンネットを跳ね上げる跳ね上げ部と、
を有する歩行者保護装置であって、
該ボンネットの跳ね上げが行われるときに、車両の前部の車高を低減させる車高低減手段を有することを特徴とする歩行者保護装置。 A pedestrian detection sensor disposed on the front of the vehicle to detect a pedestrian collision;
A calculation unit that receives an output signal of the pedestrian detection sensor, determines a collision of the pedestrian, and generates a pedestrian collision signal;
A flip-up unit that flips up the hood when the pedestrian collision signal is input;
A pedestrian protection device comprising:
A pedestrian protection device comprising vehicle height reduction means for reducing the vehicle height at the front of the vehicle when the bonnet is flipped up. 前記車高低減手段は、車両の前部のショックアブソーバーを圧縮する請求項１記載の歩行者保護装置。   The pedestrian protection device according to claim 1, wherein the vehicle height reducing means compresses a shock absorber at a front portion of the vehicle. 前記車高低減手段は、
前記ショックアブソーバーと略平行に配設され、前記歩行者衝突信号が入力されたときに上下方向にのびる油圧シリンダと、
一端が該ショックアブソーバーの上部に接続され他端が該油圧シリンダの下方の端部に接続されたアッパーアームと、
一端が該ショックアブソーバーの下部に接続され他端が該油圧シリンダの上方の端部に接続されたロアーアームと、
を有する請求項２記載の歩行者保護装置。 The vehicle height reducing means is
A hydraulic cylinder disposed substantially parallel to the shock absorber and extending in a vertical direction when the pedestrian collision signal is input;
An upper arm having one end connected to the upper part of the shock absorber and the other end connected to the lower end of the hydraulic cylinder;
A lower arm having one end connected to the lower part of the shock absorber and the other end connected to the upper end of the hydraulic cylinder;
The pedestrian protection device according to claim 2, comprising: フロントピラーにもうけられ前記歩行者衝突信号が入力されたときにボンネット上および／または少なくともウィンドシールドの下部もしくはＡピラー部に展開するエアバックを有する請求項１記載の歩行者保護装置。   The pedestrian protection device according to claim 1, further comprising an air bag that is provided on a front pillar and expands on a hood and / or at least a lower portion of the windshield or an A pillar portion when the pedestrian collision signal is input.
JP2004078954A 2004-03-18 2004-03-18 Pedestrian protection device Expired - Fee Related JP4200440B2 (en)

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