DE102006019580B4 - Operating method for an electromotive power steering of a vehicle - Google Patents
Operating method for an electromotive power steering of a vehicle Download PDFInfo
- Publication number
- DE102006019580B4 DE102006019580B4 DE102006019580.9A DE102006019580A DE102006019580B4 DE 102006019580 B4 DE102006019580 B4 DE 102006019580B4 DE 102006019580 A DE102006019580 A DE 102006019580A DE 102006019580 B4 DE102006019580 B4 DE 102006019580B4
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- DE
- Germany
- Prior art keywords
- vehicle
- servomotor
- power steering
- electric
- straight
- Prior art date
- Legal status (The legal status 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 status listed.)
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Links
- 238000011017 operating method Methods 0.000 title claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
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- 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
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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
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- 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
Landscapes
- 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
Betriebsverfahren für eine elektromotorische Servolenkung eines Fahrzeugs, wobei im Falle eines zumindest annähernd 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 zunächst in eine geradeaus weisende Position gebracht und anschließend in dieser Geradeaus-Position gehalten werden, wobei zum Halten der lenkbaren Fahrzeugräder entweder die einzelnen Phasen eines als Stellmotor vorgesehenen elektrischen Mehrphasen-Stellmotors kurzgeschlossen werden oder dieser elektrische Mehrphasen-Stellmotor zum Halten der lenkbaren Fahrzeugräder mit einem zeitlich konstanten Pulsweiten-Modulationssignal angesteuert wird.Operating method for an electric motor power steering system of a vehicle, wherein in the event of an at least approximately frontal impact of the vehicle on an obstacle, the electric servomotor of the power steering is suitably controlled, characterized in that the suitable control is that the steerable vehicle wheels initially in a straight-ahead position brought and then held in this straight-ahead position, wherein for holding the steerable vehicle wheels either the individual phases of an electric multi-phase servomotor provided as a servomotor are short-circuited or this electric multi-phase servomotor for holding the steerable vehicle wheels with a temporally constant pulse width modulation signal becomes.
Description
Die Erfindung betrifft ein Betriebsverfahren für eine elektromotorische Servolenkung eines Fahrzeugs, wobei im Falle eines zumindest annähernd frontalen Aufpralls des Fahrzeugs auf ein Hindernis der elektrische Stellmotor der Servolenkung geeignet angesteuert wird. Zum technischen Umfeld wird neben der
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 schlägt die eingangs erstgenannte Schrift ein mechanisches Gestänge zwischen der Stoßstange eines PKW's und einer Spurstange des lenkbaren Vorderrads vor, mittels derer dieses bei einem frontalen Aufprall in etwa in die Geradeaus-Position gebracht wird. Ferner lehrt die oben zweitgenannte Schrift, dass im Falle eines teilüberdeckten Aufpralls eines Fahrzeugs auf einem Hindernis dessen elektromotorische Servolenkung die lenkbaren Fahrzeugräder so positioniert, dass eine Abgleitkollision ermöglicht wird.Unfortunately, traffic accidents in road traffic can not be completely avoided, at least the aim is to keep the negative consequences of such accidents, in which, generally speaking, an impact of a vehicle on an obstacle, in particular for the vehicle occupants as low as possible. In this sense, the first-mentioned document proposes a mechanical linkage between the bumper of a car and a tie rod of the steerable front wheel, by means of which this is brought in a frontal impact in about the straight ahead position. Further, the above-mentioned second art teaches that in the case of a partially covered crash of a vehicle on an obstacle, the electromotive power steering thereof positions the steerable vehicle wheels so as to allow a sliding collision.
Eine weitere Verbesserung eines Betriebsverfahrens nach dem Oberbegriff des Anspruchs 1 aufzuzeigen, ist Aufgabe der vorliegenden Erfindung. Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, dass die geeignete Ansteuerung darin besteht, dass die lenkbaren Fahrzeugräder zunächst in eine geradeaus weisende Position gebracht und anschließend in dieser Geradeaus-Position gehalten werden, wobei zum Halten der lenkbaren Fahrzeugräder entweder die einzelnen Phasen eines als Stellmotor vorgesehenen elektrischen Mehrphasen-Stellmotors kurzgeschlossen werden oder dieser elektrische Mehrphasen-Stellmotor zum Halten der lenkbaren Fahrzeugräder mit einem zeitlich konstanten Pulsweiten-Modulationssignal angesteuert wird.A further improvement of an operating method according to the preamble of claim 1 is the object of the present invention. The solution to this problem is characterized in that the appropriate control is that the steerable vehicle wheels are first brought into a straight-ahead position and then held in this straight-ahead position, wherein for holding the steerable vehicle wheels either the individual phases of an intended as a servomotor multi-phase electric servomotor are short-circuited or this electric multi-phase servo motor is controlled to hold the steerable vehicle wheels with a time-constant pulse width modulation signal.
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, können die negativen Folgen für die Fahrzeug-Insassen minimiert werden, 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. Deshalb wird vorgeschlagen, die lenkbaren Räder in diese Position zu bringen – es sei denn, sie hätten diese Position bereits inne.In a substantially frontal impact in which the vehicle is substantially perpendicular to an obstacle and thus experiences the greatest deceleration (as compared to an oblique impact) and must absorb the largest impact energy, the negative consequences for the vehicle occupants can be minimized when the steerable front wheels of the vehicle are substantially in the straight-ahead position, i. H. are substantially in the vehicle longitudinal direction and thus are also aligned substantially perpendicular to the obstacle. In this position, the front wheels of the vehicle can best absorb impact energy to be destroyed, and can damage the passenger compartment of the vehicle, directly or indirectly, least. Therefore, it is proposed to bring the steerable wheels into this position - unless they already have this position.
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.It has further been recognized that it is helpful if the steerable front wheels of the vehicle are selectively kept in said straight-ahead position in the event of an impact, so that they are not in a less favorable position due to the obstacle or due to the impact-deforming vehicle parts can be pivoted. Furthermore, it was recognized that such a detention of the steerable wheels of a vehicle with an electromotive power steering system can be achieved in a particularly simple and effective manner by suitable control of the electric servomotor of the power steering. For this purpose, a substantially electric three-phase servomotor (or multi-phase servomotor) essentially simply blocked for electromotive vehicle power steering systems, and for this purpose can be controlled with a phase-specific time-constant pulse width modulation signal. Alternatively, the individual phases of the electric servomotor can be selectively short-circuited to hold the steerable vehicle wheels substantially in a straight ahead position.
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.The appropriate control of the electric motor in the event of a detected or recognizable Fzg.-impact on an obstacle can be triggered by a trigger signal for a Fzg. Interior to protect a vehicle occupant airbag or by a suitably measured and by an electronic Control unit evaluated delay value in the vehicle longitudinal direction, which points to a not insignificant safety aspects impact. However, it can also be provided a corresponding impact detecting optical monitoring system that then triggers the appropriate control of the electric servomotor of Fzg.-power steering.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006019580.9A DE102006019580B4 (en) | 2006-04-27 | 2006-04-27 | Operating method for an electromotive power steering of a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006019580.9A DE102006019580B4 (en) | 2006-04-27 | 2006-04-27 | Operating method for an electromotive power steering of a vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102006019580A1 DE102006019580A1 (en) | 2007-10-31 |
| DE102006019580B4 true DE102006019580B4 (en) | 2015-06-25 |
Family
ID=38542294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102006019580.9A Active DE102006019580B4 (en) | 2006-04-27 | 2006-04-27 | Operating method for an electromotive power steering of a vehicle |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102006019580B4 (en) |
Families Citing this family (1)
| 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)
| 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 |
-
2006
- 2006-04-27 DE DE102006019580.9A patent/DE102006019580B4/en active Active
Patent Citations (6)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006019580A1 (en) | 2007-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| R012 | Request for examination validly filed |
Effective date: 20130130 |
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| R016 | Response to examination communication | ||
| R018 | Grant decision by examination section/examining division | ||
| R020 | Patent grant now final |