EP1603784A1 - Procede de commande d'un circuit de freinage d'un vehicule automobile - Google Patents

Procede de commande d'un circuit de freinage d'un vehicule automobile

Info

Publication number
EP1603784A1
EP1603784A1 EP04718965A EP04718965A EP1603784A1 EP 1603784 A1 EP1603784 A1 EP 1603784A1 EP 04718965 A EP04718965 A EP 04718965A EP 04718965 A EP04718965 A EP 04718965A EP 1603784 A1 EP1603784 A1 EP 1603784A1
Authority
EP
European Patent Office
Prior art keywords
generator
brake
braking
braking torque
deceleration
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Withdrawn
Application number
EP04718965A
Other languages
German (de)
English (en)
Inventor
Norbert Ehmer
Jochen FÜHRER
René HUTH
Andreas Emmerich
Yasser Dayoub
Alfred Eckert
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1603784A1 publication Critical patent/EP1603784A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • B60L7/12—Dynamic electric regenerative braking for vehicles propelled by dc motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
    • B60L7/26—Controlling the braking effect
    • 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
    • B60T13/58—Combined or convertible systems
    • B60T13/585—Combined or convertible systems comprising friction brakes and retarders
    • B60T13/586—Combined or convertible systems comprising friction brakes and retarders the retarders being of the electric type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/12—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/26—Driver interactions by pedal actuation
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/60—Regenerative braking
    • B60T2270/602—ABS features related thereto
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/60—Regenerative braking
    • B60T2270/603—ASR features related thereto
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/60—Regenerative braking
    • B60T2270/613—ESP features related thereto
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the invention relates to a method for controlling a
  • Brake system of a motor vehicle in particular for the control of a regenerative brake system with a number of friction brakes and an electrical generator for a motor vehicle. It also relates to a software module for controlling the process.
  • motor vehicles with a regenerative braking system generally have various types of brakes, which are also called brake actuators.
  • hydraulic friction brakes as are known from ordinary motor vehicles, and an electrically regenerative brake are used.
  • the brake pressure for the friction brakes is applied via a brake pressure generating means or via the brake pedal movement.
  • the electro-regenerative brake is generally designed as an electric generator, via which at least part of the total braking power is applied.
  • the electrical energy obtained is fed into or back into a storage medium such as an on-board battery and reused for driving the motor vehicle via a suitable drive.
  • Regenerative braking systems can be implemented as so-called serial regenerative concepts, in which the proportion of braking torque that is generated by the generator is possible. is high.
  • parallel or so-called drag torque-based regenerative concepts are also known, in which the braking torque is distributed to the brake actuators in predetermined ratios.
  • delay components both of the generator and of the friction brakes, are usually present in all operating states.
  • Mixed concepts of these two braking concepts are also known. It is common to all systems that at least some areas of the braking torque to be applied are braked simultaneously with several brake actuators, so that the total deceleration is composed of the deceleration components of the brake actuators.
  • brake-by-wire brake systems are known in serial regenerative brake systems.
  • the braking energy is generally divided into portions of the friction brakes and portions of the electric generator that are generated by the target brake mor ⁇ ent, the state of charge of the battery and especially the operating range and other special properties of the generator is dependent.
  • the brake pressure is built up independently of the hydraulic influence of the brake pedal because of the brake energy distribution.
  • the brake pressure is built up as a function of the position of the brake pedal.
  • the position of the brake pedal with or without auxiliary energy, builds up the pressure of a brake medium which is absorbed by the friction brake.
  • the pedal position thus corresponds to the braking behavior of the motor vehicle.
  • Exceptions may be the use of electronic security systems, such as the electrical stability program (ESP), can include independent brake pressure build-up, regardless of the brake pedal position.
  • ESP electrical stability program
  • a “brake-by-wire” brake system is associated with a high outlay and costs.
  • the invention is therefore based on the object of specifying a method for controlling a brake system which has an electrically controllable generator and a number of friction brakes, so that a high level of braking comfort can be achieved with a simple brake system. Furthermore, a software module that is particularly suitable for carrying out the method is to be specified.
  • this object is achieved according to the invention in that the total deceleration in a parallel design is composed of deceleration components of the friction brakes and of the generator, the target braking torque of the generator being determined by determining an overall target deceleration and the generator being controlled via this target braking torque.
  • the invention is based on the consideration that in a parallel braking method or braking system, in which the braking torque in a parallel design is composed of a generator braking torque and braking torque of friction brakes, an acceptable pedal feeling is established.
  • the method should not cause the brake pressure to build up actively, so that there is no effect on the brake pedal.
  • a braking request is therefore converted into the hydraulic brake medium pressure of the friction brakes and the braking torque resulting from a comparison with the braking request is superimposed on the generator.
  • the brake pedal corresponds to the braking behavior of the motor vehicle, since the total deceleration corresponds to the brake pressure of the hydraulic friction brake.
  • the friction brake pressure in turn corresponds to the position of the brake pedal, because, for example, when increasing the braking torque, correspondingly more hydraulic fluid is pressed from the brake pedal to the friction brakes.
  • the total target deceleration is determined for controlling the generator via a corresponding target braking torque.
  • the target deceleration component of the generator can then be determined via the deceleration component of the friction brakes and the generator can be controlled via this or via the resulting generator target braking torque.
  • the braking torque of the generator is advantageously limited by a maximum braking torque in a selected speed range. This also ensures that the braking torque component of the friction brakes is still large enough in this speed range, so that the brake pedal position corresponds as closely as possible to the braking behavior of the motor vehicle.
  • the range between 10 and 50 km / h is expediently selected as the speed range.
  • the maximum braking torque for the generator is preferably the torque that corresponds to a contribution of the generator to the total deceleration of approximately 0.15 g.
  • the torque of an electric generator rises steeply at low speeds, in particular between 10 and 20 km / h. If the braking torque is limited from 10 km / h, the braking torque of the generator is smoothed when the jump point changes.
  • sudden changes in braking torque of the generator at the edge regions of the speed range are preferably smoothed out in order to avoid a negative effect on the braking behavior.
  • the generator is advantageously operated as soon as there is no positive acceleration of the motor vehicle.
  • the driver therefore perceives the deceleration effect of the generator as an additional engine brake, and braking due to the friction of the engine can also be carried out.
  • the generator is preferably given the torque that corresponds to a contribution of the generator to the total deceleration of approximately 0.1 g.
  • this is expediently determined via a displacement sensor of the brake pedal of the brake system.
  • the brake pressure which is present at the brake pedal when the brake pedal is in a certain position and which can also be used to determine the total target braking torque this is preferably determined via a pressure sensor which is positioned on the hydraulic line of the brake system leading to a friction brake.
  • Additional signals can also be used to determine the total target braking torque.
  • Signals that are available in the braking system are advantageously used.
  • signals can be used to control security systems such as ABS (anti-lock braking system), ESP (electronic stability program) or ASC (anti-slip control) can be used and are available in the braking system.
  • ABS anti-lock braking system
  • ESP electronic stability program
  • ASC anti-slip control
  • a brake system is expediently controlled using a method described above via a software module.
  • An electrically controlled brake system can also be expanded with such a software module.
  • a software module is preferably part of a braking system of a motor vehicle.
  • the advantages achieved by the invention are, in particular, the possibility of controlling a regenerative braking system in such a way that comfortable braking comfort is achieved, the deceleration behavior of the motor vehicle corresponding to the position of the brake pedal.
  • Another advantage of the invention is that the outlay for implementing the brake system described is comparatively low. All that is required is a suitable software module to control the braking system. The brake system controlled with a software module therefore has a very favorable cost-benefit ratio.
  • Another advantage is that electrically controllable braking systems can be retrofitted with the software module. Both regenerative braking systems and conventional brake systems with friction brakes and an additional electrical generator.
  • Figure 1 shows the basic circuit diagram of a brake system (1)
  • Figure 2 shows a braking process, with proportional braking torques of the generator (4) and friction brakes (2) depending on the time.
  • FIG. 1 shows a basic circuit diagram of a brake system 1 for a motor vehicle.
  • the braking system 1 is a regenerative braking system 1 which, in addition to the 4 friction brakes 2, also has an electrical generator 4 for generating electrical energy.
  • the brake pressure required for the friction brakes 2 is applied to the master brake cylinder 8 via the brake pedal 6 and the brake booster 7.
  • Brake master B is pressed from master brake cylinder 8 via hydraulic lines 10 to friction brakes 2.
  • the master brake cylinder 2 is designed for a suitable delivery capacity as a tandem master cylinder.
  • the brake system 1 is designed for a high level of braking comfort in that the movement of the brake pedal 6 corresponds to the braking behavior of the motor vehicle.
  • the brake system 1 is designed as a parallel regenerative brake system 1.
  • the total deceleration of the motor vehicle during a braking process is composed of deceleration components from generator 4 and friction brakes 2.
  • the brake system 1 has a software module 12 which specifies a setpoint braking torque for the generator 4. This is calculated from the total target deceleration
  • the brake pedal travel or the position of the brake pedal 6 and the brake fluid pressure of the brake fluid B in the hydraulic lines 10 are used as input variables.
  • the brake pedal eg is determined with the displacement sensor 24, which is positioned on the brake pedal 6, while the brake medium pressure is measured with the pressure sensor 26 on the hydraulic line 10.
  • FIG. 2 therefore shows a braking process with proportional braking torques of generator 4 and friction brakes 2 as a function of time.
  • the braking process assumes an output speed of 100 km / h.
  • Line 1 represents the braking request or the target total deceleration, which the driver enters via the brake pedal 6.
  • the braking setpoint deceleration initially increases linearly when the brake pedal 6 is depressed, remains constant over the braking process and is linearly reduced again to zero at the end by releasing the brake pedal 6.
  • both the braking torque of the generator 4 and that of the friction brakes 2 increases linearly, the braking torque portion of the generator 4 being 40% (line 2) and that of the friction brakes 60% (line 3) when the maximum total deceleration is reached.
  • the available braking torque of the generator 4 increases.
  • the braking torque is limited by the software module to a braking torque that corresponds to a proportional deceleration of the motor vehicle via the generator 4 of approximately 0.15 g.
  • the increase up to this maximum braking torque of the generator 4 to a share of 50% of the total braking torque is regulated in a linearly increasing manner.
  • the braking torque share of the friction brakes also drops to 50%.
  • the brake pedal 6 is released, the braking torque components of both the friction brakes and that of the generator drop linearly to zero.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un procédé selon lequel un circuit de freinage (1) qui comprend un générateur à commande électrique (4) et un certain nombre de freins à friction (2), est commandé de manière à améliorer le confort de freinage. A cet effet, la décélération totale se compose de la conception simultanée de parts de décélération des freins à friction (2) et du générateur (4). Le couple de freinage théorique du générateur (4) est déterminé par la détermination d'une décélération théorique totale et le générateur (4) est commandé à l'aide de ce couple de freinage théorique.
EP04718965A 2003-03-12 2004-03-10 Procede de commande d'un circuit de freinage d'un vehicule automobile Withdrawn EP1603784A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10311129 2003-03-12
DE10311129 2003-03-12
PCT/EP2004/050279 WO2004080774A1 (fr) 2003-03-12 2004-03-10 Procede de commande d'un circuit de freinage d'un vehicule automobile

Publications (1)

Publication Number Publication Date
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EP (1) EP1603784A1 (fr)
JP (1) JP2006520177A (fr)
DE (1) DE112004000388D2 (fr)
WO (1) WO2004080774A1 (fr)

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WO2004080774A1 (fr) 2004-09-23
JP2006520177A (ja) 2006-08-31
DE112004000388D2 (de) 2006-02-09
US20060220452A1 (en) 2006-10-05

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