DE102006019580A1 - Vehicle electric power steering operating method, involves controlling electrical actuator of power steering for retaining guidable vehicle wheels in straight-position when vehicle hits right-angled obstacle - Google Patents

Vehicle electric power steering operating method, involves controlling electrical actuator of power steering for retaining guidable vehicle wheels in straight-position when vehicle hits right-angled obstacle Download PDF

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Publication number
DE102006019580A1
DE102006019580A1 DE102006019580A DE102006019580A DE102006019580A1 DE 102006019580 A1 DE102006019580 A1 DE 102006019580A1 DE 102006019580 A DE102006019580 A DE 102006019580A DE 102006019580 A DE102006019580 A DE 102006019580A DE 102006019580 A1 DE102006019580 A1 DE 102006019580A1
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Germany
Prior art keywords
vehicle
power steering
straight
operating method
vehicle wheels
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DE102006019580A
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German (de)
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DE102006019580B4 (en
Inventor
Björn Hamburger
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Priority to DE102006019580.9A priority Critical patent/DE102006019580B4/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/025—Active steering aids, e.g. helping the driver by actively influencing the steering system after environment evaluation
    • B62D15/0265—Automatic obstacle avoidance by steering
    • 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
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D9/00—Steering deflectable wheels not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Air Bags (AREA)

Abstract

The method involves controlling an electrical actuator of the power steering, when a vehicle hits essentially right-angled obstacle. The control is existed such that the guidable vehicle wheels are retained in a straight-position with a temporally constant pulse width modulation signal. The guidable vehicle wheels in the straight-position or the individual positions of the electrical multi-phase actuator are essentially short circuited.

Description

Die Erfindung betrifft ein Betriebsverfahren für eine elektromotorische Servolenkung eines Fahrzeugs, wobei im Falle eines im wesentlichen frontalen Aufpralls des Fahrzeugs auf ein Hindernis der elektrische Stellmotor der Servolenkung geeignet angesteuert wird. Zum technischen Umfeld wird beispielshalber auf die DE 101 13 098 A1 sowie die DE 198 28 693 A1 verwiesen.The invention relates to an operating method for an electric motor power steering system of a vehicle, wherein in the event of a substantially frontal impact of the vehicle on an obstacle of the electric servomotor of the power steering is suitably controlled. The technical environment is for example on the DE 101 13 098 A1 as well as the DE 198 28 693 A1 directed.

Nachdem sich Verkehrsunfälle im Straßenverkehr leider nicht vollständig vermeiden lassen, wird zumindest angestrebt, die negativen Folgen solcher Unfälle, bei denen allgemein gesprochen ein Aufprall eines Fahrzeugs auf ein Hindernis erfolgt, insbesondere für die Fahrzeuginsassen so gering als möglich zu halten. In diesem Sinne eine weitere Verbesserung eines Betriebsverfahrens nach dem Oberbegriff des Anspruchs 1 aufzuzeigen, ist Aufgabe der vorliegenden Erfindung.After this Traffic accidents in traffic unfortunately not complete avoid, at least, the negative consequences such accidents, in which, generally speaking, a collision of a vehicle an obstacle occurs, especially for the vehicle occupants so low as possible to keep. In this sense, a further improvement of an operating procedure According to the preamble of claim 1 show, is the object of the present Invention.

Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, dass die geeignete Ansteuerung darin besteht, dass die lenkbaren Fahrzeugräder im wesentlichen in einer Geradeaus-Position gehalten werden. Vorteilhafte Weiterbildungen sind Inhalt der Unteransprüche.The solution This object is characterized in that the appropriate control It is that the steerable vehicle wheels substantially in one Straight ahead position. Advantageous developments are content of the subclaims.

Es wurde erkannt, dass bei einem im wesentlichen frontalen Aufprall, bei welchem das Fahrzeug im wesentlichen rechtwinkelig auf ein Hindernis auftrifft und somit (im Vergleich zu einem Schräg-Aufprall) die größte Verzögerung erfährt und die größte Aufprallenergie absorbieren muss, die negativen Folgen für die Fahrzeug-Insassen minimiert werden können, wenn sich die lenkbaren Vorderräder des Fahrzeugs im wesentlichen in Geradeaus-Position befinden, d.h. im wesentlichen in Fahrzeug-Längsrichtung stehen und somit ebenfalls im wesentlichen senkrecht zum Hindernis ausgerichtet sind. In dieser Position können die Vorderräder des Fahrzeugs zu vernichtende Aufprallenergie bestmöglich aufnehmen und können direkt oder indirekt die Fahrgastzelle des Fahrzeugs am wenigsten schädigen.It it was recognized that in a substantially frontal impact, in which the vehicle impinges on an obstacle substantially at right angles and thus (compared to a slant impact) experiences the greatest delay and the biggest impact energy must absorb the negative consequences for the vehicle occupants minimized can be when the steerable front wheels of the vehicle are substantially in the straight-ahead position, i. essentially in the vehicle longitudinal direction stand and thus also substantially perpendicular to the obstacle are aligned. In this position, the front wheels of the Vehicle record to be destroyed impact energy as possible and can directly or indirectly damage the passenger compartment of the vehicle least.

Ferner wurde erkannt, dass es hilfreich ist, wenn die lenkbaren Vorderräder des Fahrzeugs im Falle eines Aufpralls gezielt in der genannten Geradeaus-Position gehalten werden, so dass diese durch das Hindernis oder durch sich aufgrund des Aufprall verformende Fahrzeug-Teile nicht in eine ungünstigere Position verschwenkt werden können. Weiterhin wurde erkannt, dass ein derartiges Festhalten der lenkbaren Räder eines Fahrzeugs mit einem elektromotorischen Servolenksystem besonders einfach und wirkungsvoll durch geeignete Ansteuerung des elektrischen Stellmotors der Servolenkung erreicht werden kann. Hierfür kann ein für elektromotorische Fzg.-Servolenksysteme im wesentlichen üblicher elektrischer Dreiphasen-Stellmotor (oder Mehrphasen-Stellmotor) nämlich einfach praktisch blockiert und hierfür mit einem phasenspezifisch zeitlich konstanten Pulsweiten-Modulationssignal angesteuert werden. Alternativ können zum Halten der lenkbaren Fahrzeugräder im wesentlichen in Geradeaus-Position die einzelnen Phasen des elektrischen Stellmotors gezielt kurzgeschlossen werden.Further It has been recognized that it is helpful if the steerable front wheels of the Vehicle in the event of an impact targeted in the said straight ahead position be held so that these through the obstacle or through yourself due to the impact deforming vehicle parts not in a less favorable Position can be pivoted. Farther was recognized that such a holding the steerable wheels of a Vehicle with an electromotive power steering system especially simple and effective by suitable control of the electrical Servo motor of the power steering can be achieved. This can be a for electromotive Vehicle power steering systems essentially conventional three-phase electric servomotor (or Multi-phase servo motor) namely just practically blocked and this with a phase-specific temporally constant pulse width modulation signal be controlled. Alternatively you can for holding the steerable vehicle wheels substantially in the straight ahead position the individual phases of the electric servomotor specifically short-circuited become.

Die geeignete Ansteuerung des Elektromotors im Falle eines erkannten bzw. erkennbaren Fzg.-Aufpralls auf ein Hindernis kann durch ein Auslösesignal für einen im Fzg.-Innenraum zum Schutz eines Fzg.-Insassen vorgesehnen Airbags ausgelöst werden oder durch einen geeignet gemessenen und von einer elektronischen Steuereinheit ausgewerteten Verzögerungswert in Fahrzeug-Längsrichtung, der auf einen unter Sicherheitsaspekten nicht zu vernachlässigenden Aufprall hindeutet. Es kann aber auch ein einen entsprechenden Aufprall erkennendes optisches Überwachungssystem vorgesehen sein, dass dann die geeignete Ansteuerung des elektrischen Stellmotors der Fzg.-Servolenkung auslöst. Schließlich kann eine geeignete Ansteuerung des elektrischen Stellmotors nicht nur darin bestehen, dass die lenkbaren Fahrzeugräder in im wesentlichen Geradeaus-Position gehalten werden, sondern dass vorhergehend diese Räder zunächst in eine im wesentlichen geradeaus weisende Position gebracht werden, wobei noch darauf hingewiesen sei, dass durchaus eine Vielzahl von Details abweichend von obigen Erläuterungen gestaltet sein kann, ohne den Inhalt der Patentansprüche zu verlassen.The suitable control of the electric motor in case of a detected or recognizable Fzg. impact on an obstacle can by a trigger signal for one in Fzg. Interior to protect a vehicle occupant vorgesehnen airbags to be triggered or by a suitably measured and by an electronic Control unit evaluated delay value in vehicle longitudinal direction, the on a security aspects not negligible Impact suggests. But it can also be a corresponding impact recognizing optical surveillance system Be provided that then the appropriate control of the electrical Actuator of the vehicle power steering triggers. Finally, a suitable driver of the electric servomotor not only consist in that the steerable vehicle wheels in a substantially straight ahead position be held, but that previously these wheels in first be placed in a substantially straight-ahead position, it should be noted that quite a variety of Details may differ from the above explanations, without the content of the claims to leave.

Claims (5)

Betriebsverfahren für eine elektromotorische Servolenkung eines Fahrzeugs, wobei im Falle eines im wesentlichen frontalen Aufpralls des Fahrzeugs auf ein Hindernis der elektrische Stellmotor der Servolenkung geeignet angesteuert wird, dadurch gekennzeichnet, dass die geeignete Ansteuerung darin besteht, dass die lenkbaren Fahrzeugräder im wesentlichen in einer Geradeaus-Position gehalten werden.Operating method for an electric motor power steering system of a vehicle, wherein in the event of a substantially frontal impact of the vehicle on an obstacle, the electric servomotor of the power steering is suitably controlled, characterized in that the suitable control consists in that the steerable vehicle wheels substantially in a straight line Be held in position. Betriebsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass der elektrische Mehrphasen-Stellmotor zum Halten der lenkbaren Fahrzeugräder im wesentlichen in Geradeaus-Position mit einem zeitlich konstanten Pulsweiten-Modulationssignal angesteuert wird.Operating method according to claim 1, characterized that the electric multiphase actuator for holding the steerable vehicle wheels essentially in the straight ahead position with a time constant Pulse width modulation signal is controlled. Betriebsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass zum Halten der lenkbaren Fahrzeugräder im wesentlichen in Geradeaus-Position die einzelnen Phasen des elektrischen Mehrphasen-Stellmotors kurzgeschlossen werden.Operating method according to claim 1, characterized that for holding the steerable vehicle wheels substantially in the straight ahead position shorted the individual phases of the electric multi-phase servo motor become. Betriebsverfahren nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die geeignete Ansteuerung des Elektromotors durch ein Auslösesignal für einen Airbag oder einen gemessenen Verzögerungswert in Fahrzeug-Längsrichtung, der auf einen unter Sicherheitsaspekten nicht zu vernachlässigenden Aufprall hindeutet, oder durch ein einen entsprechenden Aufprall erkennendes optisches Überwachungssystem ausgelöst wird.Operating method according to one of the preceding according claims, characterized in that the appropriate control of the electric motor by a trigger signal for an airbag or a measured deceleration value in the vehicle longitudinal direction, which indicates a not insignificant safety aspects impact, or triggered by a corresponding impact detecting optical monitoring system. Betriebsverfahren nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die geeignete Ansteuerung darin besteht, dass die lenkbaren Fahrzeugräder zunächst in eine im wesentlichen geradeaus weisende Position gebracht werden und anschließend in dieser Geradeaus-Position gehalten werden.Operating method according to one of the preceding Claims, characterized in that the suitable driving consists in that the steerable vehicle wheels first be brought into a substantially straight-ahead position and subsequently be held in this straight-ahead position.
DE102006019580.9A 2006-04-27 2006-04-27 Operating method for an electromotive power steering of a vehicle Active DE102006019580B4 (en)

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DE102006019580B4 DE102006019580B4 (en) 2015-06-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010052416A1 (en) * 2010-11-24 2012-01-05 Daimler Ag Method for controlling safety system for vehicle, involves predicting time of collision, depending on determined vehicle surrounding data and vehicle state parameters, where safety system is activated for predetermined time

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400547C1 (en) * 1994-01-11 1995-02-23 Daimler Benz Ag Device for influencing the deformation zone in motor vehicles
DE4326668C2 (en) * 1993-08-09 1997-07-31 Miroslaw Wardyn Device on passenger vehicles
DE19828693A1 (en) * 1998-06-26 1999-12-30 Volkswagen Ag Method and control device for minimizing the consequences of accidents
DE10113098A1 (en) * 2001-03-17 2002-09-19 Volkswagen Ag Safety device includes means whereby front wheels are swung out from normal position into protective position deviating from it, with inner side of front wheels in direction of engine compartment's rear bulkhead
DE10233575A1 (en) * 2002-07-24 2004-02-12 Robert Bosch Gmbh Personal protection during impact of object on vehicle involves transmitting control instruction to vehicle steering system depending on detected impact position to enable compensating collision
DE102005005412A1 (en) * 2005-02-05 2006-08-10 Volkswagen Ag Oncoming traffic accident avoiding device for vehicle, has arithmetic and logic unit generating input signal based on signals of sensor, and actuator operated on wheel of vehicle based on input signal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326668C2 (en) * 1993-08-09 1997-07-31 Miroslaw Wardyn Device on passenger vehicles
DE4400547C1 (en) * 1994-01-11 1995-02-23 Daimler Benz Ag Device for influencing the deformation zone in motor vehicles
DE19828693A1 (en) * 1998-06-26 1999-12-30 Volkswagen Ag Method and control device for minimizing the consequences of accidents
DE10113098A1 (en) * 2001-03-17 2002-09-19 Volkswagen Ag Safety device includes means whereby front wheels are swung out from normal position into protective position deviating from it, with inner side of front wheels in direction of engine compartment's rear bulkhead
DE10233575A1 (en) * 2002-07-24 2004-02-12 Robert Bosch Gmbh Personal protection during impact of object on vehicle involves transmitting control instruction to vehicle steering system depending on detected impact position to enable compensating collision
DE102005005412A1 (en) * 2005-02-05 2006-08-10 Volkswagen Ag Oncoming traffic accident avoiding device for vehicle, has arithmetic and logic unit generating input signal based on signals of sensor, and actuator operated on wheel of vehicle based on input signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010052416A1 (en) * 2010-11-24 2012-01-05 Daimler Ag Method for controlling safety system for vehicle, involves predicting time of collision, depending on determined vehicle surrounding data and vehicle state parameters, where safety system is activated for predetermined time

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