DE102014200852A1 - Hydraulic vehicle brake system - Google Patents
Hydraulic vehicle brake system Download PDFInfo
- Publication number
- DE102014200852A1 DE102014200852A1 DE102014200852.2A DE102014200852A DE102014200852A1 DE 102014200852 A1 DE102014200852 A1 DE 102014200852A1 DE 102014200852 A DE102014200852 A DE 102014200852A DE 102014200852 A1 DE102014200852 A1 DE 102014200852A1
- Authority
- DE
- Germany
- Prior art keywords
- brake
- return line
- pump
- valve
- brake system
- 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.)
- Withdrawn
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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
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/161—Systems with master cylinder
- B60T13/162—Master cylinder mechanically coupled with booster
- B60T13/163—Pilot valve provided inside booster piston
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
-
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
-
- 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
- B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
- B60T8/44—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 having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
- B60T8/445—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 having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems replenishing the released brake fluid volume into the brake piping
-
- 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
- B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
- B60T8/48—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 having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
- B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
- B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
Die Erfindung betrifft eine hydraulische Fahrzeugbremsanlage, die einen an einem drucklosen Vorratsbehälter (6) angeschlossenen Bremsdruckgeber (1) mit einer Radbremse (2) verbindet, mit einem zwischen dem Bremsdruckgeber (1) und der Radbremse (2) in die Bremsleitung (10) eingesetzten, elektromagnetisch betätigbares Einlassventil (8), sowie mit einem elektromagnetisch betätigbaren Auslassventil (13), das stromabwärts zur Radbremse (2) in eine Rücklaufleitung (4) eingesetzt ist, mit einer an der Rücklaufleitung (4) saugseitig angeschlossenen Pumpe (11), die druckseitig Druckmittel über das Einlassventil (8) zur Radbremse (2) als auch über ein stromaufwärts zum Einlassventil (8) in der Bremsleitung (10) angeordnetes Trennventil (7) in Richtung des Bremsdruckgebers (1) fördert, sowie mit einem zwischen der Pumpe (11) und einem Elektromotor (9) angeordneten mechanischen Getriebe (5). Um einen vollständigen Abbau des Bremsdrucks in der Radbremse zu gewährleisten, sieht die Erfindung vor, dass die Rücklaufleitung (4) ohne die Verwendung eines Niederdruckspeichers unmittelbar mit dem Vorratsbehälter (6) verbunden ist.The invention relates to a hydraulic vehicle brake system which connects a brake pressure generator (1) connected to a pressureless reservoir (6) to a wheel brake (2) with one between the brake pressure generator (1) and the wheel brake (2) in the brake line (10) electromagnetically actuated inlet valve (8), as well as with an electromagnetically operable outlet valve (13), which is inserted into a return line (4) downstream of the wheel brake (2), with a pump (11) connected on the suction side to the return line (4) on the pressure side via the inlet valve (8) to the wheel brake (2) as well as via a upstream to the inlet valve (8) in the brake line (10) arranged separating valve (7) in the direction of the brake pressure generator (1) promotes, and with a between the pump ( 11) and an electric motor (9) arranged mechanical transmission (5). In order to ensure a complete reduction of the brake pressure in the wheel brake, the invention provides that the return line (4) without the use of a low-pressure accumulator is directly connected to the reservoir (6).
Description
Die Erfindung betrifft eine hydraulische Fahrzeugbremsanlage nach dem Oberbegriff des Patentanspruchs 1. The invention relates to a hydraulic vehicle brake system according to the preamble of patent claim 1.
Aus
Damit sichergestellt ist, dass beim Einsatz der Bremsanlage in einem Elektro- oder Hybridfahrzeug während einer Verzögerung des Fahrzeugs die Radbremsen zum Zwecke einer möglichst hohen Energierückgewinnung im Generatorbetrieb nicht aktiviert werden, wird vorgeschlagen dass das jeweils in der Rücklaufleitung eingesetzte Druckmodulationsventil geöffnet ist, damit der während einer Bremsbetätigung erzeugte Bremsdruck anstelle zu den Radbremsen in den Niederdruckspeicher gelangen kann. Da der Niederdruckspeicher in der Regel einen federbeaufschlagten, in einer Speicherkammer abgedichteten Kolben aufnimmt, bedarf es einem entsprechend hohen Betätigungsdruck, damit anstelle der Radbremsen die Speicherkammer den erzeugten Bremsdruck aufzunehmen vermag. Folglich verursacht der Niederdruckspeicher eine gewisse Hysterese, wodurch ein unerwünschter, signifikanter Druckaufbau in den Radbremsen nicht ausgeschlossen werden kann, der sich nachteilig auf die Energierückgewinnung im Generatorbetrieb des Fahrzeugs auswirkt. To ensure that when using the brake system in an electric or hybrid vehicle during a deceleration of the vehicle, the wheel brakes for the highest possible energy recovery in generator mode are not activated, it is proposed that the respectively used in the return line pressure modulation valve is open, so that during a brake actuation generated brake pressure can get into the low-pressure accumulator instead of the wheel brakes. Since the low-pressure accumulator usually receives a spring-loaded, sealed in a storage chamber piston, it requires a correspondingly high operating pressure, so that instead of the wheel brakes, the storage chamber is able to absorb the brake pressure generated. Consequently, the low-pressure accumulator causes a certain hysteresis, whereby an undesirable, significant pressure build-up in the wheel brakes can not be excluded, which adversely affects the energy recovery in the generator operation of the vehicle.
Daher ist es die Aufgabe der vorliegenden Erfindung, eine hydraulische Fahrzeugbremsanlage der angegebenen Art mit möglichst einfachen, kostengünstigen Mitteln derart auszugestalten, dass zur möglichst effektiven Energierückgewinnung während des Fahrzeug-Generatorbetriebs kein Druckaufbau in den Radbremsen stattfindet. Therefore, it is the object of the present invention, a hydraulic vehicle brake system of the specified type with the simplest possible, inexpensive means to design such that the most effective energy recovery during vehicle generator operation takes place no pressure buildup in the wheel brakes.
Diese Aufgabe wird erfindungsgemäß für eine hydraulische Fahrzeugbremsanlage der angegebenen Art durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. This object is achieved for a hydraulic vehicle brake system of the type indicated by the characterizing features of claim 1.
Weitere Merkmale und Vorteile der Erfindung gehen im Nachfolgenden aus der Beschreibung eines Ausführungsbeispiels anhand der
Jeder abgebildete Bremskreis weist eine Bremsleitung
Die von einem Elektromotor
Die bisher beschriebenen Einzelheiten umfassen die für eine Blockierschutzregelung notwendigen Funktionselemente. Damit auch eine Antriebsschlupf- als auch Fahrdynamikregelung möglich ist, befindet sich ferner in jedem Bremskreis zwischen dem Bremsdruckgeber
Sowohl in der Fahrdynamik- als auch Antriebschlupfregelung nimmt das Trennventil
Zur Vermeidung eines Schmutzeintrags aus dem Vorratsbehälter
Damit die vorgestellte hydraulische Fahrzeugbremsanlage weiterhin alle baulichen Voraussetzungen erfüllt, um durch Rekuperation die kinetische Energie eines Elektro- oder Hybridfahrzeugs über einen Generator in elektrische Energie umzuwandeln, sieht die Erfindung vor, dass zur möglichst hohen Energierückgewinnung im Generatorbetrieb und damit zur vollständigen Ausnutzung der kinetischen Energie des Elektro- oder Hybridfahrzeugs, die vom Fahrer gewünschte Bremsverzögerung primär durch den Fahrzeuggenerator (sogenannter Rekuperatorbetrieb) zustande kommt, weshalb bei einer Betätigung des Bremsdruckgebers
Infolge des Verzichts auf den bisher in der Rücklaufleitung
Wie hierzu aus der
Beim Einsatz der vorgestellten Fahrzeugbremsanlage in einem Elektro- oder Hybridfahrzeug vermindert demnach der Generator seine Bremswirkung mit abnehmender Fahrzeuggeschwindigkeit so weit, dass bei sehr geringer Fahrzeuggeschwindigkeit die weitere Fahrzeugverzögerung auf konventionelle Art abhängig von der Betätigung des Bremspedals und/oder der Pumpe
Der konventionelle, schlupffreie Bremsdruckaufbau in den Radbremsen
Das dem Auslassventil
Zur Regelung des Radschlupfes werden die Ein- und Auslassventile
Um das Eindringen von Luft in die Pumpe
Wie aus der
Zusammenfassend lässt sich feststellen, dass durch den Verzicht auf einen bisher in der Rücklaufleitung
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Bremsdruckgeber Brake pressure transducer
- 22
- Radbremse wheel brake
- 33
- Kammer chamber
- 44
- Rücklaufleitung Return line
- 55
- Getriebe transmission
- 66
- Vorratsbehälter reservoir
- 77
- Trennventil isolation valve
- 88th
- Einlassventil intake valve
- 99
- Elektromotor electric motor
- 1010
- Bremsleitung brake line
- 1111
- Pumpe pump
- 1212
- Antriebswelle drive shaft
- 1313
- Auslassventil outlet valve
- 1414
- Ringdichtung ring seal
- 1515
- Pumpenkolben pump pistons
- 1616
- Ringdichtung ring seal
- 1717
- Druckregelventil Pressure control valve
- 1818
- Exzenter eccentric
- 1919
- Filterelement filter element
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- EP 0950004 B1 [0002] EP 0950004 B1 [0002]
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014200852.2A DE102014200852A1 (en) | 2014-01-17 | 2014-01-17 | Hydraulic vehicle brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014200852.2A DE102014200852A1 (en) | 2014-01-17 | 2014-01-17 | Hydraulic vehicle brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102014200852A1 true DE102014200852A1 (en) | 2015-07-23 |
Family
ID=53497767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102014200852.2A Withdrawn DE102014200852A1 (en) | 2014-01-17 | 2014-01-17 | Hydraulic vehicle brake system |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102014200852A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3533674A4 (en) * | 2016-10-28 | 2020-03-25 | Ovik Leonardovich Mkrthyan | HYDRAULIC BRAKING SYSTEM FOR TRANSPORT VEHICLE |
| CN111301378A (en) * | 2020-03-05 | 2020-06-19 | 吉林大学 | Controllable drive-by-wire braking system of simulation footboard sensation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4107978A1 (en) * | 1991-03-13 | 1992-09-17 | Bosch Gmbh Robert | Vehicle hydraulic braking system with drive slip regulation - uses pumped circulation for raising temp. of brake fluid to improve braking response |
| EP0950004B1 (en) | 1997-01-09 | 2001-05-09 | Continental Teves AG & Co. oHG | Hydraulic unit |
| DE10140918A1 (en) * | 2001-05-28 | 2002-12-05 | Continental Teves Ag & Co Ohg | Motor-pump unit for automobile braking system has pump shaft driven by electric motor supported by roller bearing for reception of both radial and axial loads |
| DE10335176A1 (en) * | 2003-07-30 | 2005-02-24 | Continental Teves Ag & Co. Ohg | Brake device for vehicle, has route connected between discharge side of pressure source and electric motor of pressure source for removing liquid leaks, in which route is connectable to suction side of pressure source |
| DE102004042759A1 (en) * | 2003-09-08 | 2005-06-16 | Advics Co., Ltd., Kariya | Devices for controlling the brake fluid pressure |
| DE102004027508A1 (en) * | 2004-06-04 | 2005-12-22 | Robert Bosch Gmbh | Hydraulic brake system and method for influencing a hydraulic brake system |
-
2014
- 2014-01-17 DE DE102014200852.2A patent/DE102014200852A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4107978A1 (en) * | 1991-03-13 | 1992-09-17 | Bosch Gmbh Robert | Vehicle hydraulic braking system with drive slip regulation - uses pumped circulation for raising temp. of brake fluid to improve braking response |
| EP0950004B1 (en) | 1997-01-09 | 2001-05-09 | Continental Teves AG & Co. oHG | Hydraulic unit |
| DE10140918A1 (en) * | 2001-05-28 | 2002-12-05 | Continental Teves Ag & Co Ohg | Motor-pump unit for automobile braking system has pump shaft driven by electric motor supported by roller bearing for reception of both radial and axial loads |
| DE10335176A1 (en) * | 2003-07-30 | 2005-02-24 | Continental Teves Ag & Co. Ohg | Brake device for vehicle, has route connected between discharge side of pressure source and electric motor of pressure source for removing liquid leaks, in which route is connectable to suction side of pressure source |
| DE102004042759A1 (en) * | 2003-09-08 | 2005-06-16 | Advics Co., Ltd., Kariya | Devices for controlling the brake fluid pressure |
| DE102004027508A1 (en) * | 2004-06-04 | 2005-12-22 | Robert Bosch Gmbh | Hydraulic brake system and method for influencing a hydraulic brake system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3533674A4 (en) * | 2016-10-28 | 2020-03-25 | Ovik Leonardovich Mkrthyan | HYDRAULIC BRAKING SYSTEM FOR TRANSPORT VEHICLE |
| US11364889B2 (en) | 2016-10-28 | 2022-06-21 | Ovik Leonardovich Mkrthyan | Vehicular hydraulic brake system |
| CN111301378A (en) * | 2020-03-05 | 2020-06-19 | 吉林大学 | Controllable drive-by-wire braking system of simulation footboard sensation |
| CN111301378B (en) * | 2020-03-05 | 2024-01-26 | 吉林大学 | Controllable drive-by-wire braking system of simulation footboard sensation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R083 | Amendment of/additions to inventor(s) | ||
| R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B60T0008460000 Ipc: B60T0008480000 |
|
| R163 | Identified publications notified | ||
| R005 | Application deemed withdrawn due to failure to request examination |