DE19608616A1 - Arrangement for reducing stopping distance of motor vehicles by reducing reaction time of driver for emergency braking - Google Patents
Arrangement for reducing stopping distance of motor vehicles by reducing reaction time of driver for emergency brakingInfo
- Publication number
- DE19608616A1 DE19608616A1 DE1996108616 DE19608616A DE19608616A1 DE 19608616 A1 DE19608616 A1 DE 19608616A1 DE 1996108616 DE1996108616 DE 1996108616 DE 19608616 A DE19608616 A DE 19608616A DE 19608616 A1 DE19608616 A1 DE 19608616A1
- Authority
- DE
- Germany
- Prior art keywords
- reducing
- braking
- driver
- motor vehicles
- stopping distance
- 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.)
- Granted
Links
- 230000035484 reaction time Effects 0.000 title claims description 4
- 238000012790 confirmation Methods 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011157 data evaluation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/3255—Systems in which the braking action is dependent on brake pedal data
- B60T8/3275—Systems with a braking assistant function, i.e. automatic full braking initiation in dependence of brake pedal velocity
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Bei herkömmlich manuellen Bremssystemen im KFZ muß der Fahrer um in Notsituationen eine Bremsung (Vollbremsung) einzuleiten, das Gaspedal zurücknehmen, mit dem "Gasfuß" vom Gaspedal zum Bremspedal Überwechseln und dann den vollen Bremsdruck, der für eine Bremsung (Vollbremsung) erforderlich ist, aufbauen.In conventional manual brake systems in the vehicle, the driver has to brake in emergency situations Initiate (full braking), take back the accelerator pedal, with the "accelerator foot" from the accelerator pedal to the brake pedal Transfer and then the full brake pressure required for braking (full braking) build up.
Laut "Dubbel": (Taschenbuch für den Maschinenbau) vergeht zwischen dem Erkennen eines Hindernisses und dem Umsetzen des Fußes auf das Bremspedal die Reaktionszeit tr (0,5-1,2 s) und zum Aufbau maximaler Verzögerung wird als Schwellzeit (ca. 0,2 s) angenommen.According to "Dubbel": (paperback for mechanical engineering) passes between the detection of an obstacle and the reaction time tr (0.5-1.2 s) after moving the foot to the brake pedal and to build up maximum delay, the threshold time (approx. 0.2 s) is assumed.
Gerade bei geringen Geschwindigkeiten < 50 km/h hat der zurückgelegte Weg (in der Reaktionszeit) einen großen Anteil am Anhalteweg, so daß man sagen kann, je niedriger die Reaktionszeit, umso niedriger das Risiko eines Unfalls, bzw. umso niedriger die Unfallschwere.Especially at low speeds <50 km / h, the distance covered (in the response time) has one large proportion of the stopping distance, so that the lower the response time, the lower the Risk of an accident, or the lower the severity of the accident.
Der Erfindergedanke ist, die aktive Sicherheit zu erhöhen, indem der Reaktionsweg und damit der Anhalteweg verkürzt wird. Dies soll dadurch geschehen, daß Gas- und Bremspedal mit elektronischen Sensoren ausgestattet werden. Die Sensoren erfassen die Geschwindigkeit bzw. die Beschleunigung und Stellung von Gas- und Bremspedal. Ähnlich wie beim ABS, wo Sensoren Radgeschwindigkeiten erfassen und gegebenenfalls das ABS ein Blockieren der Räder verhindert.The inventive idea is to increase the active safety by the reaction path and thus the stopping path is shortened. This should be done by using the gas and brake pedals with electronic sensors be equipped. The sensors record the speed or the acceleration and position of Accelerator and brake pedals. Similar to the ABS, where sensors record wheel speeds and if necessary ABS prevents the wheels from locking.
In der Mechanik der Pedale können die Sensoren durch Weg bzw. Winkelmessung Geschwindigkeit bzw. Beschleunigung und Stellung von Gas- und Bremspedal erfassen, und die Daten an ein Steuergerät weitergeben. Wenn der Fahrer eine gefährliche Situation erkannt hat und daraufhin eine Bremsung (Vollbremsung) einleiten möchte, wird er erfahrungsgemäß den Gasfuß wesentlich schneller vom Gaspedal nehmen, als beim "normalen" Gas wegnehmen, wie z. B. beim "Kuppeln" oder beim "Stop and Go". Diese Tatsache soll nach Erfindergedanke genutzt werden, indem die Daten der Pedalbewegungen vom Steuergerät (Computer) mit den gespeicherten Daten über Bremsungen (Vollbremsungen) verglichen werden. Liegt laut Datenbefund keine Bremsung (Vollbremsung) vor, so steuert der Fahrer alle folgenden Fahrzeugbewegungen herkömmlich manuell. Liegt laut Datenbefund dagegen aber eine Bremsung (Vollbremsung) vor, so gibt das Steuergerät ein Signal zur Bremsung (Vollbremsung) an ein Fremdbremskraftsystem und die Bremsung (Vollbremsung) wird automatisch eingeleitet.In the mechanics of the pedals, the sensors can measure speed or Accelerate and position the accelerator and brake pedals, and send the data to a control unit pass on. When the driver detects a dangerous situation and then brakes Experience (full braking), he will experience the accelerator from the accelerator pedal much faster take than with the "normal" gas, such as. B. in "coupling" or in "stop and go". This The fact is to be used according to the inventive idea, by the data of the pedal movements from the control unit (Computer) with the stored data on braking (full braking) are compared. Lies out loud If there is no braking (full braking), the driver controls all subsequent vehicle movements traditionally manual. If, however, according to the data, there is braking (full braking), this is the case Control unit sends a signal for braking (full braking) to an external braking system and braking (Full braking) is initiated automatically.
Das Fremdbremskraftsystem ist notwendig, da der Fahrer das Bremspedal noch nicht erreicht hat und daher noch nicht aus Eigenkraft bremsen kann.The external braking force system is necessary because the driver has not yet reached the brake pedal and therefore cannot brake on its own.
Das Fremdbremskraftsystem (autom. Bremssystem, Bremskraftverstärker, Druckluftbremsablage etc.) ist Stand der Technik.The third-party brake power system (automatic brake system, brake booster, air brake pad, etc.) is at the state of the technique.
Durch folgendes wird die Zeit zur Bremseinleitung auf ein Minimum reduziert.The following reduces the time to initiate the brake to a minimum.
- 1. Der Fahrer macht bei einer Bremsung (Vollbremsung) die gleichen ihm bekannten Abläufe, ohne etwas anderes ungewohntes ausüben zu müssen. Ein zusätzlicher Schalter o. ä. muß nicht erst gesucht werden.1. When braking (full braking), the driver does the same procedures known to him, without to have to do something different. An additional switch or the like does not have to be looked for first.
- 2. Nur wenige mm Pedalbewegung reichen zur Datenauswertung.2. Only a few mm of pedal movement are sufficient for data evaluation.
- 3. Die Zeit zum Umsetzen des Fußes auf das Bremspedal entfällt.3. There is no time to transfer the foot to the brake pedal.
- 4. Die Zeit zum Aufbau des vollen notwendigen Bremsdruckes zur maximalen Verzögerung wird reduziert, da ein Sensor gesteuertes Fremdbremskraftsystem wesentlich schneller sein kann, als man es mit dem herkömmlichen Bremsfuß schaffen könnte.4. The time to build up the full brake pressure necessary for maximum deceleration reduced, since a sensor-controlled external braking system can be much faster than you can with could create the conventional brake foot.
Das Steuergerät soll logisch arbeiten. So soll nur die Zeit zur Bremseinleitung reduziert werden. Wenn der Fahrer den Bremsdruck mit dem Bremspedal reduziert, bricht das Fremdbremskraftsystem die Bremsung (Vollbremsung) augenblicklich ab und der Fahrer übernimmt die weitere Verzögerung.The control unit should work logically. Only the time to initiate the brake should be reduced. If the If the driver reduces the brake pressure with the brake pedal, the external brake force system breaks the brake (Full braking) immediately and the driver takes over the further deceleration.
Hat das Steuergerät das Signal zum Bremsen gegeben, aber der Fahrer verbleibt mit dem Fuß auf dem Gaspedal oder gibt wieder Gas, so erfolgt ebenfalls ein Bremsabbruchsignal.The control unit has given the signal to brake, but the driver remains on the Accelerator pedal or accelerates again, there is also a brake cancellation signal.
Weiter soll ein Bremsabbruchsignal erfolgen, wenn nach "angemessener" Zeit vom Fahrer mit dem Bremspedal keine Bestätigung zur Bremsung erfolgt, oder die Daten vom Bremspedal erkennen lassen, daß der Fahrer keine Bremsung (Vollbremsung) erwünscht.A brake abort signal is also to be given if, after an "appropriate" time, the driver presses the brake pedal there is no confirmation of braking or the data from the brake pedal indicate that the driver no braking (full braking) desired.
Um Fehler bei der Datenerfassung durch die Sensoren zu vermeiden, erscheint es sinnvoll, pro Pedal mit mehreren Sensoren zu messen. Wenn die Auswertung dann keine übereinstimmenden Werte vorweisen, kann das System automatisch abgestellt werden. Dem Fahrer wird dieses durch ein Warnzeichen signalisiert.In order to avoid errors in the data acquisition by the sensors, it makes sense to use per pedal to measure multiple sensors. If the evaluation then shows no matching values, can the system can be turned off automatically. This is signaled to the driver by a warning sign.
Genauso kann der jeweilige Fahrer selbst bestimmen, ob er das System einschaltet und nutzen möchte. In the same way, the respective driver can determine whether he wants to switch on and use the system.
Die folgenden Tabellen zeigen, welche Restgeschwindigkeit dem KFZ A (altes Bremssystem) an dem Punkt verbleibt, wo KFZ B (neues Bremssystem) bereits steht.The following tables show the remaining speed of vehicle A (old brake system) remains at the point where vehicle B (new brake system) is already.
Beide Fahrzeuge bremsen aus einer Anfangsgeschwindigkeit von Vo = 100 km/h (27,8 m/s) und einer Bremsverzögerung von a′ = 10 m/s². Bei Tabelle 1 gehen wir von einer Reaktionszeitersparnis tr = 0,5 sec. aus. Das entspricht einer Anhaltewegverkürzung für KFZ B vonBoth vehicles brake from an initial speed of Vo = 100 km / h (27.8 m / s) and a braking deceleration of a ′ = 10 m / s². In Table 1 we assume a reaction time saving tr = 0.5 sec. out. This corresponds to a shorter stopping distance for vehicle B from
27,8 m/s * 0,5 s = 13,9 m.27.8 m / s * 0.5 s = 13.9 m.
KFZ A verbleibt dann noch eine Restgeschwindigkeit vonMotor vehicle A then still has a remaining speed of
Vrest = (2 * 10 m/s² * 13,9 m) ∧ 1/2 = 16,67 m/s = 60,0 km/hVrest = (2 * 10 m / s² * 13.9 m) ∧ 1/2 = 16.67 m / s = 60.0 km / h
wo KFZ B bereits steht.where car B already stands.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996108616 DE19608616C2 (en) | 1996-03-06 | 1996-03-06 | Device for reducing the stopping distance of motor vehicles by reducing the driver's reaction time in the event of emergency braking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996108616 DE19608616C2 (en) | 1996-03-06 | 1996-03-06 | Device for reducing the stopping distance of motor vehicles by reducing the driver's reaction time in the event of emergency braking |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19608616A1 true DE19608616A1 (en) | 1997-09-11 |
DE19608616C2 DE19608616C2 (en) | 1999-04-29 |
Family
ID=7787366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1996108616 Expired - Fee Related DE19608616C2 (en) | 1996-03-06 | 1996-03-06 | Device for reducing the stopping distance of motor vehicles by reducing the driver's reaction time in the event of emergency braking |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19608616C2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19734567A1 (en) * | 1997-07-18 | 1999-01-21 | Itt Mfg Enterprises Inc | Vehicle brake control system |
DE19817326A1 (en) * | 1998-04-18 | 1999-10-21 | Continental Teves Ag & Co Ohg | Method of reducing braking distance to enable suitable deceleration in all driving situations |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5433512A (en) * | 1992-11-13 | 1995-07-18 | Honda Giken Kogyo Kabushiki Kaisha | Braking system for electric vehicle |
DE4430461A1 (en) * | 1994-08-27 | 1996-02-29 | Teves Gmbh Alfred | Method for controlling the brake pressure as a function of the pedal actuation speed |
-
1996
- 1996-03-06 DE DE1996108616 patent/DE19608616C2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5433512A (en) * | 1992-11-13 | 1995-07-18 | Honda Giken Kogyo Kabushiki Kaisha | Braking system for electric vehicle |
DE4430461A1 (en) * | 1994-08-27 | 1996-02-29 | Teves Gmbh Alfred | Method for controlling the brake pressure as a function of the pedal actuation speed |
Non-Patent Citations (1)
Title |
---|
Betriebsanleitung Audi 90/quattro, 1984, S. 44/45 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19734567A1 (en) * | 1997-07-18 | 1999-01-21 | Itt Mfg Enterprises Inc | Vehicle brake control system |
WO2000007859A1 (en) * | 1997-07-18 | 2000-02-17 | Continental Teves Ag & Co. Ohg | Device and method for controlling a braking system in a motor vehicle |
DE19817326A1 (en) * | 1998-04-18 | 1999-10-21 | Continental Teves Ag & Co Ohg | Method of reducing braking distance to enable suitable deceleration in all driving situations |
US6473681B1 (en) | 1998-04-18 | 2002-10-29 | Continental Teves Ag & Co., Ohg | Method for reducing braking distance |
Also Published As
Publication number | Publication date |
---|---|
DE19608616C2 (en) | 1999-04-29 |
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Legal Events
Date | Code | Title | Description |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8339 | Ceased/non-payment of the annual fee | ||
8370 | Indication of lapse of patent is to be deleted | ||
8365 | Fully valid after opposition proceedings | ||
8339 | Ceased/non-payment of the annual fee |