WO2023241971A1 - Système de frein de service pour véhicules à alimentation électrique avec circuits de fluide de refroidissement couplés d'entraînement et de freinage - Google Patents

Système de frein de service pour véhicules à alimentation électrique avec circuits de fluide de refroidissement couplés d'entraînement et de freinage Download PDF

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Publication number
WO2023241971A1
WO2023241971A1 PCT/EP2023/064942 EP2023064942W WO2023241971A1 WO 2023241971 A1 WO2023241971 A1 WO 2023241971A1 EP 2023064942 W EP2023064942 W EP 2023064942W WO 2023241971 A1 WO2023241971 A1 WO 2023241971A1
Authority
WO
WIPO (PCT)
Prior art keywords
service brake
brake
drive unit
service
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.)
Ceased
Application number
PCT/EP2023/064942
Other languages
German (de)
English (en)
Inventor
Matthias MÜLLER-LINKOWITSCH
Wolfgang Barth
Daniel Martin
Christian Sibla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Priority to CN202380045395.4A priority Critical patent/CN119343258A/zh
Publication of WO2023241971A1 publication Critical patent/WO2023241971A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/78—Features relating to cooling
    • F16D65/84—Features relating to cooling for disc brakes
    • F16D65/853—Features relating to cooling for disc brakes with closed cooling system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors

Definitions

  • the invention relates to a service brake system in a vehicle with at least one electric drive axle, the service brake system having an independently controllable braking device for each wheel, in particular for motor vehicles such as passenger cars (cars), vans, etc.
  • the field of application of the invention lies in particular in the automotive industry in the field of electric or hybrid vehicles, preferably in increasing the efficiency of main operating components of electromobility.
  • the drag losses which describe the effective delay from the opened to the closed brake pad or disk state, are due to primary influencing variables such as medium in the air gap (air clearance), lining width, number and diameter of the friction surfaces, and secondary influences, such as lining surface and friction lining usage , urgently needs improvement.
  • the clearance distance between brake pad and brake disc in disc brake systems is particularly important because a distance between the brake pad and the brake disc is essential for the (unbraked) rotation of the brake disc, but on the other hand the clearance leads to an extension of the braking distance when the brakes are actuated.
  • the hydraulic actuator for the controllable actuation of the service brake device can also be designed for the positive locking of a parking brake.
  • each service brake device has a cooling device which is coupled to a cooling device of a drive unit via a common heat exchanger system, the heat exchanger system being set up for intelligent thermal management of the drive unit, service brake devices and the control of the heat balance of heating or cooling systems of the vehicle.
  • the heat exchanger system can advantageously be connected to means for system-wide control of recuperation braking of the drive unit, brake control of the service brake devices, thermal coupling of fluid-cooled service brake devices and drive unit in order to achieve a shift in the thermal operating point of the drive unit via the heat exchanger system on the basis of increased heat generation through linked control of the service brake devices at the same time increasing the performance of the drive unit.
  • a vehicle with at least one electric drive axle which includes a service brake system according to one of the previously described embodiments.
  • the invention is based on the knowledge that in modern motor vehicles with any drive technology, the service brake system already meets the basic requirements for this due to integrated safety functions such as electronic stability program (ESP), traction control (ASR), anti-lock braking system (ABS), etc.). are to further integrate the service braking system into the electric drive system and to improve its sustainability with regard to the wet braking concept. However, ease of maintenance and reliability in electrical accident situations must also be taken into account.
  • ESP electronic stability program
  • ASR traction control
  • ABS anti-lock braking system
  • the present invention therefore aims to integrate a significantly reduced wear and maintenance effort into an existing oil cooling circuit of the drive unit, particularly in a passenger car with a so-called E-axle and with braking devices designed as wet brakes, and to replace a previously prioritized electromechanical actuation of the service brake devices with an alternative Replace actuation using pressure hydraulics.
  • This hydraulic actuation of the braking devices was not an option for an E-axle that was conventionally equipped with low-pressure oil circuits, since the oil circuits of the braking devices and/or the heat exchanger of the drive unit cannot simply be used for hydraulic brake actuation of the wet brake.
  • the load on the drive unit when the load on the drive unit is low and/or when the outside temperature is low, the load on the drive unit can be increased in order to raise the too low operating point of the drive system by means of a defined activation of the service brake system in order to generate additional heat in both systems, the drive system and the service brake system especially when starting cold, a faster shift in the operating point is achieved.
  • the invention realizes an alternative way to improve the reliable actuation of the service brake system for electric or hybrid vehicles, which increases the reliability and ease of maintenance of the actuation of the service brake system while maintaining sustainability through wet brake concepts with synergistic thermal and control technology coupling with the electric drive system.
  • FIG. 1 a schematic representation of a drive axle of an electrically driven motor vehicle with wet service brake units and hydraulically operated actuators
  • Fig. 1 shows a schematic structure of the drive axle 1 of an electric vehicle (BEV, HEV or PHEV), which includes a drive unit 2 (hereinafter also electric machine 2), which generates a torque which is transmitted via a gear ratio 4 and then via a differential 3 is transferred to a drive axle with the drive wheels 5.
  • the electric machine 2 can contain one or more electric motors, which can either represent the sole drive or work as part of a hybrid drive.
  • the electric machine 2 includes all the necessary electronics for its control and operation as well as necessary or optional sensors.
  • a service brake device 6 On the drive axle 1 there is a service brake device 6 on both sides of the differential 3, which is designed as a wet-running multi-disc brake and can decelerate the electric vehicle by generating a braking torque.
  • both service brake devices 6 there is a brake system with an identical structure consisting of a multi-disc wet brake, an electrohydraulically controlled actuator 10 and a return spring 8, which sets the respective actuator 10 in a left zero position N-L for the left brake B-L and a right zero position N-R for the right brake B-R .
  • the braking effect is generated in both service brake devices 6 equipped with multi-disc wet brakes via a frictional connection caused by the hydraulic actuator 10, the actuator 10 being controlled electro-hydraulically by the pressure oil system 9.
  • the design as a wet, low-wear, maintenance-free multi-disc brake also results in advantages such as the reduction of braking influences on driving behavior due to the coaxial brake (rotationally symmetrical friction linings), efficiency optimization through the arrangement and dimensioning of the separation springs, the type and number and diameter of the friction linings as well as elimination of environmental influences, such as water, dirt, salt, etc., on the braking behavior and prevention of standing damage, as is often the case with dry disc brakes.
  • waste heat can therefore also be transported particularly conveniently via the heat exchanger system 7 to more distant positions (not shown) in the vehicle where it can be used, for example, to heat the interior, regulate the temperature of the battery pack, etc. or be released into the environment.
  • the problem of the very moderate, uneven heating behavior of the electric drive unit 2 including the vehicle cooling circuit of the heat exchanger system 7 is solved by a now possible shift in the operating point of the electric drive unit 2 with simultaneous return of the thermal energy - through the heat coupling of the cooling devices 71 of the electric drive unit 2 and the service braking devices 6 - in the vehicle system is solved (components and cooling circuit).
  • An advantageous function of the heat coupling of the drive unit 2 and service brake devices 6 is achieved in such a way that when the drive unit 2 is under low load and/or at a low outside temperature, the operating point of the drive unit 2 is raised which is too low by a defined connection of the service brake device 6 while the temperature is kept constant ( e.g. speed-controlled) driving speed of the car, the load on the drive unit 2 is increased in both Components, the drive unit 2 and the service brake devices, to generate additional heat, which primarily warms up the drive unit 2 to the desired operating temperature in the low-wear working area and further maintains this forced increased load condition in the event of additional heating requirements for the battery pack and / or the interior of the car.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention se rapporte à un système de frein de service pour un véhicule présentant au moins un essieu d'entraînement électrique (1), le système de frein de service présentant, pour l'essieu d'entraînement (1), par roue (5), un dispositif de frein de service (6) pouvant être commandé indépendamment. Le problème de la découverte d'une possibilité alternative d'amélioration d'actionnement fiable du système de frein de service pour des véhicules électriques ou hybrides est résolu en ce que chaque dispositif de frein de service commandable (6) est sous la forme d'un frein humide à disques multiples et présente un actionneur hydraulique (10) pour un actionnement de frein pouvant être commandé au moyen d'un système de frein à huile sous pression (9). Le système de frein à huile sous pression (9) comprend de préférence des pompes électriques pour la génération de pression et la commande de la puissance de freinage.
PCT/EP2023/064942 2022-06-13 2023-06-05 Système de frein de service pour véhicules à alimentation électrique avec circuits de fluide de refroidissement couplés d'entraînement et de freinage Ceased WO2023241971A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202380045395.4A CN119343258A (zh) 2022-06-13 2023-06-05 具有驱动器与制动器的耦合冷却回路的电驱动车辆中的行车制动系统

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022205939.5A DE102022205939B3 (de) 2022-06-13 2022-06-13 Betriebsbremssystem in elektrisch angetriebenen Fahrzeugen mit gekoppelten Kühlkreisen von Antrieb und Bremse
DE102022205939.5 2022-06-13

Publications (1)

Publication Number Publication Date
WO2023241971A1 true WO2023241971A1 (fr) 2023-12-21

Family

ID=86771258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/064942 Ceased WO2023241971A1 (fr) 2022-06-13 2023-06-05 Système de frein de service pour véhicules à alimentation électrique avec circuits de fluide de refroidissement couplés d'entraînement et de freinage

Country Status (3)

Country Link
CN (1) CN119343258A (fr)
DE (1) DE102022205939B3 (fr)
WO (1) WO2023241971A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025149524A1 (fr) * 2024-01-09 2025-07-17 Audi Ag Système de gestion thermique et procédé pour faire fonctionner un tel système de gestion thermique
WO2025149531A1 (fr) * 2024-01-09 2025-07-17 Audi Ag Système de gestion thermique et procédé de fonctionnement d'un tel système de gestion thermique
WO2025168532A1 (fr) * 2024-02-09 2025-08-14 Magna powertrain gmbh & co kg Système d'entraînement électrique avec unité de frein intégrée ayant une fonction de frein de service et de frein de stationnement
EP4671025A1 (fr) * 2024-06-24 2025-12-31 Aisin Corporation Dispositif d'entraînement de véhicule

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219921A1 (de) * 2002-05-03 2003-11-20 Zahnradfabrik Friedrichshafen Antriebsachse für elektromotorisch angetriebene Fahrzeuge
CN111734763A (zh) * 2020-07-01 2020-10-02 吉林大学青岛汽车研究院 一种湿式多盘制动器循环冷却系统
CN212455273U (zh) * 2020-06-30 2021-02-02 襄阳忠良工程机械有限责任公司 全封闭湿式制动装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007686A1 (de) 2005-02-19 2006-08-31 Zf Friedrichshafen Ag Kühlölzuführung für ein nasslaufendes Schalt-bzw. Anfahrelement
DE102010045984A1 (de) 2010-09-18 2011-05-12 Daimler Ag Verfahren zum Anfahren eines Kraftfahrzeugs
DE102021205068A1 (de) 2021-05-19 2022-11-24 Zf Friedrichshafen Ag Nachhaltiges Betriebsbremssystem für elektrisch angetriebene Kraftfahrzeuge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219921A1 (de) * 2002-05-03 2003-11-20 Zahnradfabrik Friedrichshafen Antriebsachse für elektromotorisch angetriebene Fahrzeuge
CN212455273U (zh) * 2020-06-30 2021-02-02 襄阳忠良工程机械有限责任公司 全封闭湿式制动装置
CN111734763A (zh) * 2020-07-01 2020-10-02 吉林大学青岛汽车研究院 一种湿式多盘制动器循环冷却系统

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025149524A1 (fr) * 2024-01-09 2025-07-17 Audi Ag Système de gestion thermique et procédé pour faire fonctionner un tel système de gestion thermique
WO2025149531A1 (fr) * 2024-01-09 2025-07-17 Audi Ag Système de gestion thermique et procédé de fonctionnement d'un tel système de gestion thermique
WO2025168532A1 (fr) * 2024-02-09 2025-08-14 Magna powertrain gmbh & co kg Système d'entraînement électrique avec unité de frein intégrée ayant une fonction de frein de service et de frein de stationnement
EP4671025A1 (fr) * 2024-06-24 2025-12-31 Aisin Corporation Dispositif d'entraînement de véhicule

Also Published As

Publication number Publication date
DE102022205939B3 (de) 2023-09-21
CN119343258A (zh) 2025-01-21

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