CN105035062A - High-safety vehicle braking system and braking method thereof - Google Patents
High-safety vehicle braking system and braking method thereof Download PDFInfo
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- CN105035062A CN105035062A CN201510279776.6A CN201510279776A CN105035062A CN 105035062 A CN105035062 A CN 105035062A CN 201510279776 A CN201510279776 A CN 201510279776A CN 105035062 A CN105035062 A CN 105035062A
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- electromagnetic actuator
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- 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
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- 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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
The invention provides a high-safety vehicle braking system which comprises the components of a brake pedal; a brake main cylinder; and a boost driver which is arranged in a vehicle braking path and is composed of at least one linear electromagnetic driver, wherein the linear electromagnetic driver is set to a state that the linear electromagnetic driver can be freely pushed by outside in failure; mechanical decoupling is formed between the brake pedal and the linear electromagnetic driver; the linear electromagnetic driver is driven in response to an operation of a driver to the brake pedal of the vehicle for generating a pushing force so as to push the piston of a braking main cylinder of the vehicle for generating a required braking force; and furthermore when the linear electromagnetic driver fails, by means of further treading of the user to the brake pedal, the movable part of the linear electromagnetic driver moves in a direction which facilitates pushing to the piston of the braking main cylinder. The high-safety vehicle braking system can improve reliability and braking safety of the whole braking system and prevents a braking safety problem caused by failure of the linear electromagnetic driver.
Description
Technical field
Various aspects of the present invention relate to the braking at vehicle, especially have the vehicle of line control brake system, motor vehicle driven by mixed power, have the brake system used in the vehicle of regeneration brake system and the braking method being suitable for vehicle.
Background technology
In existing motor vehicle braking system, normally comprise the brake system be made up of brake pedal, force transmission element, supercharging driver element, master brake cylinder, wheel cylinder (where necessary), wheel braking performer (such as brake disc, brake caliper), the clamp as wheel actr are connected with master brake cylinder by means of affiliated brake piping.Master brake cylinder is coupled with brake pedal, passes through force transmission element.Brake pedal is arranged for the operation of reception driver to produce braking requirement, is passed on the piston of master brake cylinder by force transmission element, promotes its motion.Supercharging driver element is arranged between master brake cylinder and brake pedal, and uses the external energy of pressurized air, low pressure or electric liquid form to strengthen to be applied to by driver the braking force on brake pedal.
In previous practice, the supercharging driver element of aforementioned arbitrary form, used, such as vacuum booster, low pressure pump/high pressure pump, electro-hydraulic driver etc., these vehicles of manufacturing designed by the companies such as such as BOSCH, daily output, TOYOYA of examples implemented place in operation or improving use.
Obviously, known by putting into practice of prior art, the supercharging driver element of these modes and have in the brake system of these elements, air pressure, the hydraulic regulating of system will become complexity, and requiring all higher to the degree of vacuum of whole brake system, oil pressure, the reliability of system receives impact.That always wish a kind of improvement or comprehensive scheme, to simplify the design of brake system, or improves the reliability of whole system.
For this reason, a kind of electric liquid composite braking system based on linear electric motors is proposed in prior art, the electro-hydraulic brake system that such as No. 2006100354730 Chinese patent proposes, the first master brake cylinder comprise brake pedal, being connected with brake pedal, it is characterized in that: also comprise motor, push rod, the second master brake cylinder, ECU control unit, described motor is connected with the second master brake cylinder by controlling push rod, and ECU control unit receives the speed-slackening signal of brake pedal, controls motor action.This technical scheme adopts linear electric motors to drive brake master cylinder piston motion with the object reaching braking, remain traditional vacuum assisted hydraulic brake system, cancel vacuum booster, change double cylinder brake master cylinder into single cylinder, can be used for, on modern pure electric automobile, alleviating manpower fatigue.But the electro-hydraulic brake system disclosed in this technical scheme, there is serious defect: when linear electric motors lost efficacy (such as motor faults itself and/or drive singal are abnormal), second master brake cylinder cannot be driven, so that there is serious consequence, when electromagnetic valve lost efficacy and or linear electric motors lost efficacy time, be in the state that cannot brake by making vehicle or brake the state that cannot recover.And first master brake cylinder and the second master brake cylinder be made up of two cover hydraulic circuits respectively, two cover hydraulic circuits carry out cooperation control by numerous electromagnetic valve, and mechanism is complicated, and volume is large, and reliability is low, and energy consumption is large, and cost is high.
And for example, a kind of mechano-electronic hydraulic brake system that No. 2014100087289 Chinese patent application proposes, comprising: brake pedal; For obtaining the sensor of speed when brake pedal is stepped on and displacement; Master brake cylinder, it is connected with four wheel cylinders via wheel cylinder hydraulic pressure force control valve; Automatically controlled linear drives module, itself and described master brake cylinder are directly connected and drive the piston of master brake cylinder to carry out straight-line motion according to the signal from described sensor; Treadle effort analog module, it utilizes motor and corresponding transmission device to provide chaufeur with brake feel.Comprise two linear electric motors connected in series, the axle of one of them motor is connected with brake pedal, and the axle of another motor is then connected with the housing of last motor, and meanwhile, this motor shaft directly promotes master cylinder and builds pressure, and its housing then connects firmly with vehicle body.In the technical scheme of the disclosure, the automatically controlled linear drives module himself proposed on the one hand, treadle effort simulation straight-line motion mechanism and connected in series two linear electric motors, the position of himself, annexation and function are not known and cause and be difficult to learn clear and definite scheme, and according to the content disclosed in it, by arranging two motors, motor near brake pedal is used for providing treadle effort to simulate, electric machine rotation is transformed to straight-line motion by a general treadle effort simulation straight-line motion mechanism comprising feed screw nut and ball-screw, is applied on pedal; Another motor is delivered on brake piston by the propulsive effort of ball screw speed reducing mechanism by motor.There is fatefulue reliability and safety problem equally: when motor failure for providing treadle effort to simulate, due to employing is that feed screw nut and ball-screw carry out sporting car transmission, therefore this motor cannot be made to carry out any operation, cause stuck, now if in braking procedure, will be fatal; If stuck after end of braking, then vehicle will remain on certain state always, causes vehicle brake pedal cannot enabling.And in this scenario, the design of booster electric machine exists and drawback like feedback electric machinery equally, and namely booster electric machine lost efficacy and will cause implementing normal brake application, or braking mode cannot be removed.
Summary of the invention
The object of first aspect present invention is to provide a kind of brake system for vehicle, comprising:
Brake pedal;
Master brake cylinder;
Be arranged at the supercharging actuator on car brakeing path, be made up of at least one linear electromagnetic actuator, this linear electromagnetic actuator is provided in when it lost efficacy and is in the state that can be promoted by external freedom;
Wherein, formed between described brake pedal and described linear electromagnetic actuator mechanically decoupled; Described linear electromagnetic actuator response is subject to drive to produce thrust in driver to the operation of vehicle brake pedal, promotes the piston movement of the master brake cylinder of vehicle thus the braking force needed for generation, and:
When described linear electromagnetic drives fail, nationality directly makes the movable part of this linear electromagnetic actuator move towards the direction being conducive to the piston promoting master brake cylinder by driver to trampling further of brake pedal.
In further example, the described brake system for vehicle comprises more:
One first transmission mechanism, is set up and is connected with brake pedal by hinge, and this first transmission mechanism has towards the corresponding stroke being conducive to promoting on the direction of brake master cylinder piston on braked channel when described brake pedal is trampled.
In further example, mechanically decoupled between described first transmission mechanism and described linear electromagnetic actuator.
In further example, described first transmission mechanism comprises:
At least one is attached via a hinge to the first connecting rod of vehicle brake pedal, and one end of described first connecting rod is hinged to described brake pedal, has a transformable gap between the movable part of the other end and described linear electromagnetic actuator on braked channel.
In further example, described supercharging actuator is made up of at least two linear electromagnetic actuators, these linear electromagnetic actuators:
1) be configured in a series arrangement in braked channel, when being driven to form making a concerted effort of the thrust of the piston movement in order to promote described master brake cylinder; Or
2) mode be separated from each other with movable part is configured in braked channel; Or
3) be configured in braked channel in the mode that fixed part is separate.
In further example, the described brake system for vehicle comprises more:
One first brake feel feedback arrangement, is arranged on described braked channel, for providing the obstruction resistance that described brake pedal advances and being applied to brake pedal, to give brake feel feedback to driver.
In further example, described first brake feel feedback mechanism comprises at least one elasticity and recovers mechanism or at least one the second linear electromagnetic actuator as brake feel feedback arrangement, produces the resistance hindering described brake pedal to advance and is also applied on brake pedal.
In further example, described first brake feel feedback mechanism comprises at least one elasticity and recovers mechanism and at least one second linear electromagnetic actuator, and this at least one elasticity recovers mechanism and at least one linear electromagnetic actuator provides the resistance hindering described brake pedal to advance to give brake feel feedback to driver jointly or separately.
In further example, the described brake system for vehicle comprises a regeneration brake system more, is arranged for and makes car brakeing by regenerative brake;
Brake torque needed for movement state information when the described brake system for vehicle is trampled based on described brake pedal calculates priority allocation regenerative braking torque are to make car retardation.
In further example, described regeneration brake system has at least one electric energy storage equipment, for generation of the device of electric energy and actuator, described actuator is arranged for and drives the described device for generation of electric energy, and the power storage that the device for generation of electric energy exports is at least one electric energy storage equipment described.
As long as should be appreciated that aforementioned concepts and all combinations of extra design described in further detail below can be regarded as a part for subject matter of the present disclosure when such design is not conflicting.In addition, all combinations of theme required for protection are all regarded as a part for subject matter of the present disclosure.
The foregoing and other aspect of the present invention's instruction, embodiment and feature can be understood by reference to the accompanying drawings from the following description more all sidedly.Feature and/or the beneficial effect of other additional aspect of the present invention such as illustrative embodiments will be obvious in the following description, or by learning in the practice of the detailed description of the invention according to the present invention's instruction.
Accompanying drawing explanation
Accompanying drawing is not intended to draw in proportion.In the accompanying drawings, each identical or approximately uniform component part illustrated in each figure can represent with identical label.For clarity, in each figure, not each component part is all labeled.Now, the embodiment of various aspects of the present invention also will be described with reference to accompanying drawing by example, wherein:
Fig. 1 is the schematic diagram of the brake system for vehicle according to certain embodiments of the invention.
Fig. 2 is the schematic diagram of the brake system for vehicle according to certain embodiments of the invention.
Fig. 3 is an instantiation schematic diagram of the brake system for vehicle according to earlier figures 1 description.
Fig. 4 is the brake system for vehicle described according to earlier figures 1, and instance basis shown in Fig. 3 increases an instantiation schematic diagram after brake feel feedback mechanism.
Fig. 5 is another instantiation schematic diagram of the brake system for vehicle according to earlier figures 1 description.
Fig. 6 is another instantiation schematic diagram of the brake system for vehicle according to earlier figures 1 description.
Fig. 7 is an instantiation schematic diagram of the brake system for vehicle according to earlier figures 2 description.
Fig. 8 is another instantiation schematic diagram of the brake system for vehicle according to earlier figures 1 description.
Fig. 9 is another instantiation schematic diagram of the brake system for vehicle according to earlier figures 2 description.
Detailed description of the invention
In order to more understand technology contents of the present invention, institute's accompanying drawings is coordinated to be described as follows especially exemplified by specific embodiment.
Each side with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.Embodiment of the present disclosure must not be intended to comprise all aspects of the present invention.Be to be understood that, multiple design presented hereinbefore and embodiment, and those designs described in more detail below and embodiment can in many ways in any one is implemented, this should be design disclosed in this invention and embodiment is not limited to any embodiment.In addition, aspects more disclosed by the invention can be used alone, or otherwisely anyly appropriately combinedly to use with disclosed by the invention.
According to of the present invention open, the realization proposing a kind of car brakeing generally, these vehicles can be such as conventional ICE-powered vehicle, the vehicle of fuel cell-driven, the vehicles etc. of core electrical energy drive, can also be at least employ can recharging storage battery and to be kept at electric energy in storage battery as vehicle drive force and at least employ electrical motor and to advance the vehicle driven as vehicle.In the scheme that the present invention proposes, adopt linear electromagnetic actuator as the supercharging actuator of car brakeing, and this linear electromagnetic actuator was in the state that can be promoted by external freedom when losing efficacy.When receiving the operation of trampling brake pedal/lever connection from driver, or from personal vehicle system, or during supercharging drive singal from DAS (Driver Assistant System), actuating unit is driven as supercharging using this linear electromagnetic actuator, produce propelling thrust, thus promote the piston movement of master brake cylinder, the braking force needed for generation.
Figure 1 shows that the system schematic of the brake system for vehicle that the present invention proposes, in this brake system, the braked channel of vehicle is provided with the supercharging actuator that a straight line electromagnetic driver 130 is provided as car brakeing, its in response to driver to the operation of vehicle brake pedal 150 to produce thrust, promote vehicle brake master cylinder 140 piston 140a move thus produce needed for braking force.
The braked channel of aforesaid vehicle, be include from brake pedal, force transmission element (where necessary), supercharging driver element (where necessary), master brake cylinder, wheel cylinder (where necessary), be finally delivered to the path that wheel braking performer (such as brake disc, brake caliper) is formed.The linear electromagnetic actuator 130 of the supercharging actuator as car brakeing the proposed more than disclosure and in following content is disposed therein, and when this linear electromagnetic actuator 130 as the supercharging actuator of car brakeing lost efficacy, it is in the state that can be promoted by external freedom, thus is beneficial to and realized emergency braking when this linear electromagnetic actuator 130 loses efficacy.
As shown in Figure 1, in this brake system, also comprise one first transmission mechanism 151, be set up and be connected with vehicle brake pedal 150 by hinge, when brake pedal 150 is trampled, this first transmission mechanism 151 has corresponding stroke.
Preferably, aforementioned first transmission mechanism 151 is configured to a bar linkage structure, its one end is set to be attached via a hinge to vehicle brake pedal 150, the other end is towards the direction of the piston applied thrust be conducive to described master brake cylinder, in example as shown in Figure 1, its other end towards the direction of aforesaid rectilinear electromagnetic driver 130, and is separated with this linear electromagnetic actuator 130, on braked channel, namely have a gap that can change along with this link work.So, make when braking requirement occurs, formed mechanically decoupled between aforementioned brake pedal 150 and linear electromagnetic actuator 130, that is, interaction relation between brake pedal 150 and linear electromagnetic actuator 130 is not fixed, especially when brake pedal 150 is depressed by driver, brake pedal 150 move the thrust that produces can not immediately, be directly delivered on linear electromagnetic actuator 130, at least in the incipient stage that brake pedal 150 depresses, thrust from brake pedal to the direct transmission of linear electromagnetic actuator 130 be interrupted.Therefore make to realize between brake pedal 150 and master brake cylinder 140 mechanically decoupled.On the one hand, line traffic control is realized; On the other hand, when linear electromagnetic actuator 130 lost efficacy, can larger power be applied by driver expediently and directly promote the movable part of linear electromagnetic actuator 130 (can move freely), make it towards the direction motion being conducive to the piston promoting master brake cylinder; And (when such as removing the operation of brake pedal) can be recovered by the internal pressure of master brake cylinder by nationality at the end of braking requirement, and the resistance of other mechanical mechanisms can not be subject to or cannot recover, also can not when linear electromagnetic actuator 130 loses efficacy, the movable part of this linear electromagnetic actuator 130 cannot be promoted and cause braking (being realized by mechanisms such as worm and gears in such as prior art), affecting brake safe.
So, even if during aforesaid linear electromagnetic drives fail, still can increase by driver and dynamics is trampled to brake pedal 150, form larger stroke, aforementioned connecting rod 151 is stressed and move towards linear electromagnetic actuator 130 with larger stroke, the movable part of linear electromagnetic actuator 130 is directly pushed and makes it towards the direction motion being conducive to the piston promoting master brake cylinder, as described in Figure 1, move towards master brake cylinder 140, and abut to its piston 140a, thus promotion piston movement, produce the braking force required by driver.
Thus, adopt such scheme, the reliability of whole brake system and the safety of braking can be improved, prevent the brake safe problem brought because of the inefficacy of supercharging actuator and linear electromagnetic actuator.
Should be noted that, linear electromagnetic actuator 130 as supercharging actuator is do not need response agency (itself also can arrange such response agency certainly) in principle, but it is preferred, also spring installation can be set inside master brake cylinder 140, these springings contribute to when brake release, linear electromagnetic actuator 130 is resetted, release master cylinder pressure.
As shown in Figure 1, should be appreciated that the aforesaid connecting rod 151 as the first force transfer mechanism, be not limited to structure as shown in Figure 1.In some instances, connecting rod 151 can be configured to the arbitrary line structure of the transmission of accomplish linear motion, also can be other structures that sense of motion changes, as L structure, be convenient to the layout of whole device in vehicle like this, otherwise long to the length of master brake cylinder 140 from brake pedal 150.Take L structure laterally (driving compartment can be parallel to) and arrange all parts from connecting rod 151 to master brake cylinder 140.
Linear electromagnetic actuator 130, includes a fixed part and movable part, and when linear electromagnetic actuator 130 is by driving, aforementioned movable part moves and produces thrust.
The movable part of the linear electromagnetic actuator of aforementioned description, can be configured to elementary, and now aforesaid fixed part is then configured to secondary.Certainly, in other embodiment, aforesaid movable part can also be configured to secondary, then aforesaid fixed part is configured to elementary.
In Fig. 1, exemplarily, the connecting rod that aforementioned first transmission mechanism 151 comprises, the mode of as described above is arranged.In other example, the first transmission mechanism 151 can also comprise multiple such connecting rod assembly together, or is formed the first transmission mechanism with connecting rod together with other mechanisms.
In the example depicted in figure 1, this brake system also comprises:
Pedal travel sensor, for the movable information of sense vehicle brake pedal;
Control unit 110, the movable information for obtaining according to motion sensor gives to drive linear electromagnetic actuator 130 to produce the drive singal of thrust.
Aforesaid pedal travel sensor, such as stroke sensor 152, angular transducer 153, pressure sensor (not shown) etc., can be all be arranged on the position closing on or touch brake pedal 150 in known manner, for responding to and obtain the movement state information of brake pedal 150 when being trampled, such as travel information, rotation angle information, pedal force etc.
In Fig. 1, stroke sensor is indicated with label 152, angular transducer is indicated with label 153, certainly installation/the placement location of these two sensors is exemplary in the example shown, in the implementation procedure of each scheme of the present invention, its position is variable, and all reasonably arrange and are related personnel institute and understand and easily realize.
In enforcement of the present invention, aforementioned stroke sensor, angular transducer are unnecessary to be arranged simultaneously, in brake system, should be appreciated that and one wherein can be selected in an advantageous manner to arrange, can certainly arrange two kinds simultaneously.
In other example, pedal travel sensor can also comprise the sensor of other types, in necessary or suitable, such as, can also arrange speed and/or acceleration pick-up, for obtaining kinematic velocity or the acceleration information of brake pedal 150.
The aforesaid movement state information that these are acquired, is transferred to control unit 110.
This control unit 110 such as can be configured to an ECU in vehicle electric element control system, certainly when necessary or suitable, also can be the set of one group of such as multiple ECU.
Control unit 110, based on these movement state information, performs computing and calculating, obtains the brake torque of driver required (namely required).Such computing, can be obtained by existing mode.
Control unit 110 is configured to produce drive singal based on the brake torque of operation result further, for driving aforesaid linear electromagnetic actuator 130, it is made to produce thrust, this thrust is applied on the piston 140a of master brake cylinder 140, promote the piston 140a motion of this master brake cylinder 140 thus the braking force needed for generation, realize car brakeing.
Control unit 110 described by the above content of the present invention and following content and the drive singal produced thereof, be not intended to show to be integrated with traditional similar motor driver (such as MOSFET, IGBT drive circuit etc.) rotated for direct-driving motor in this control unit 110, these drive singal do not mean the drive singal produced of similar traditional motor driver for direct-driving motor rotation yet.These motor drivers can be integrated in described control unit (such as some or multiple ECU), then the drive singal that aforementioned described control unit 110 produces will be directly used in drive motor motion.Certainly, these motor drivers can also be configured to not integrated with control unit 110, such as external in vehicle such as close/away from the position of motor, the drive singal that then aforementioned described control unit 110 produces will mean control signal, be provided for these motor drivers and produce the signal directly making motor movement accordingly, move with drive motor.Now, should be understood, the aforementioned drive singal produced by control unit 110 is actual is used to drive the driven signal of control motor in other words conj.or perhaps.
In earlier figures 1, what do not indicate is the one or more power-supply systems usually arranged in vehicle, for the electric control system for vehicle, such as engine management system, door control system, car lamp control system, audible control system etc. provide electric power supply.Certainly, the brake system that also can be set in more than the present invention described by perhaps following content provides electric power supply, especially for the motion of linear electromagnetic actuator 130 provides energy source.Certainly, describe in following content about the multiple linear electromagnetic actuator of configuration in whole brake system, as in the example of supercharging driver train and/or brake feel feedback mechanism, still provide energy source by one or more power-supply systems of vehicle.
Preferably, aforementioned power source system comprises chargeable storage.
In some instances, vehicle further comprises regeneration brake system, and the electric energy output that regeneration brake system produces can be stored in these to be had in the power-supply system of chargeable storage.
Certainly, these power-supply systems can comprise power-supply management system, one or more power supply (storage battery or AC), charge system (interface circuit, voltage conversion circuit etc.), power failure detection circuit, power-switching circuit/inverter, power supply status indicating circuit etc.
Should be appreciated that the aforementioned arrangements about power-supply system, be not only suitable in the example described by earlier figures 1, applicable equally in one or more brake system described below, this is mathematical.
Preferably, as shown in Figure 1, one second transmission mechanism 180 is also provided with between aforesaid rectilinear electromagnetic driver 130 and master brake cylinder 140, when aforesaid rectilinear electromagnetic driver 130 produces thrust based on drive singal, these thrust nationalitys are applied on the piston 140a of master brake cylinder 140 by this second transmission mechanism 180.
As an embodiment, aforementioned second transmission mechanism 180 is configured to a push rod, and its one end is configured to link with the movable part of aforesaid rectilinear electromagnetic driver 130, and the other end is configured to the piston direction towards aforementioned master brake cylinder 130.
Moving along with linear electromagnetic actuator 130 is promoted this push rod 180 by driving of push rod 180, thus promote piston 140a motion.
As shown in Figure 1, the other end of this push rod 180 preferably adopts the mode be fixedly connected with, and abuts on the piston 140a of described master brake cylinder, links with it, makes this push rod 180 when being subject to linear electromagnetic actuator 130 and driving, along with its movable part moves.
In Fig. 1, exemplarily, aforementioned second transmission mechanism 180 contains a push rod, and the mode of as described above is arranged.In other example, the second transmission mechanism 180 can also comprise multiple such push rod and/or hydraulic tubing is combined, and forms mode described above, realizes the transmission of the power between linear electromagnetic actuator 130 and the piston 140a of master brake cylinder 140.
Be to be understood that, exemplaryly in earlier figures 1 have expressed thrust that linear electromagnetic actuator 130 produces by the example be indirectly applied on the piston 140a of master brake cylinder 140, in other example, these thrusts can be applied directly on the piston 140a of master brake cylinder 140, and do not arrange aforesaid second transmission mechanism 180.
In multiple embodiment described above, be all described for the vehicle being provided with brake pedal, be beneficial to driver and trample and produce braking requirement.Certainly, in some other examples, such as do not design the vehicle of brake pedal, can be now substitute brake pedal with lever connection, its function and efficacy and brake pedal are substantially identical, and difference is: brake pedal is produced braking requirement when depressing, and lever connection produces braking requirement, should be appreciated that its structure and connection mode are well known to those of ordinary skill in the art or easy realization.In these examples, correspondingly, produce thrust by the aforementioned linear electromagnetic actuator 130 as supercharging actuator, promote the piston 140a motion of the master brake cylinder 140 of vehicle thus the braking force needed for generation, realize car brakeing.
In some instances, the thrust of the described piston 140a of promotion that the required brake torque of aforementioned driver and linear electromagnetic actuator 130 provide can be configured to the corresponding relation according to setting.This corresponding relation can be certain functional relation, such as linear change, nonlinearities change, or can be change according to the form mapping relations of setting, but is not for restriction with this relation listed.
Such corresponding relation can be the vehicle according to dissimilar vehicle, different performance, under different driving pattern, friction speed is interval etc. and design distinctively.Such as, the vehicle usually travelled on urban highway, aforementioned corresponding relation can be designed to according to linear relationship change, in order to gradual braking.The and for example usual vehicle travelled in high speed or field, aforementioned corresponding relation can be designed to change according to nonlinear relationship, especially at incipient stage Rapid Variable Design in the curved line relation of middle and later periods smooth change, make vehicle be able to snap catch when needs are braked to slow down, the driving reduced when unforeseen circumstances occurs is dangerous.
Certainly, such as under different driving pattern, aforesaid corresponding relation also can carry out the setting distinguished.Such as, under sport drive mode, aforementioned corresponding relation is designed to nonlinearities change, especially at incipient stage Rapid Variable Design in the curved line relation of middle and later periods smooth change.And under normal driving pattern, aforementioned corresponding relation is designed to linear change, in order to gradual braking.
In some other examples, aforementioned corresponding relation can also be carry out difference to arrange according to the difference of speed interval.Such as, when Vehicle Speed is lower than 60km/h, aforementioned corresponding relation is designed to linear change, and when Vehicle Speed is more than 60km/h, aforementioned corresponding relation is designed to nonlinearities change, especially at incipient stage Rapid Variable Design in the curved line relation of middle and later periods smooth change.
Certainly, some exemplary design of corresponding relation between the thrust of the described piston 140a of the promotion that the required brake torque of the driver more than provided and linear electromagnetic actuator 130 provide, under the instruction of example disclosed in this invention, any other embodiments not departing from essence of the present invention are those skilled in the art institute easy understand and expect, and are easily realize to the enforcement of these examples.
In Fig. 1, when being necessary, label 140b and 140c exemplarily describes front axle master cylinder and rear axle master cylinder.
Certainly, in some mechanisms that Fig. 1 had not indicated, such as compensating that liquid is filled with, medium in master brake cylinder, cylinder internal gas pressure balance channel, coordinating performer etc. for realizing oil circuit/passage that pressure transmits, wheel braking with master brake cylinder, be existing design, repeat no more in content of the present disclosure.
Certainly, what not yet indicate in FIG is, at some as in preferred scheme, mechanism is realized by arranging brake feel feedback, when braking requirement occurs, (such as driver is to the trample action of brake pedal) nationality is fed back the resistance realizing mechanism to provide hindering brake pedal to advance by this brake feel, and so coming (to driver) provides brake feel to feed back.Certainly in such example, the return spring (also becoming torsion spring) that a most frequently used example is arranged near angular transducer (angular transducer in the such as Fig. 1) position of brake pedal, this return spring on the one hand when braking requirement occurs for providing the resistance hindering brake pedal to advance, be provided for restoring force that brake pedal resets (especially when operation releasing to brake pedal) on the other hand.
Certainly, in other example, will describe as the following content of the disclosure, aforesaid brake feel feedback realizes mechanism and can also realize in other manners.
Figure 2 shows that another enforcement of the brake system for vehicle proposed by the invention, wherein with the function of each component part in earlier figures 1, constituent elements, part that effect is all identical or construct and all adopt identical label to represent, its specific implementation repeats no more in the present embodiment.It is worth mentioning that, in the example shown in Fig. 2, still do not indicate the feedback of the brake feel as aforementioned explanation preferably arranged and realize mechanism.
In the brake system of this example, as shown in Figure 2, also comprise a regeneration brake system 120, be arranged for and make car brakeing by regenerative brake.
Comparatively speaking, in the brake system gone out represented by Fig. 1 or Fig. 2, aforementionedly form hydraulic brake system by master brake cylinder and other relative component parts do not indicated, this hydraulic brake system forms the composite braking system of whole vehicle together with regeneration brake system 120.These composite braking systems are applied in elec. vehicle (EV) usually, such as pure electric vehicle, hybrid electric vehicle etc.The regeneration brake system be equipped with in these elec. vehicles (EV) may be used for reclaiming kinetic energy when car brakeing, thus energy returned to (such as comprising battery, electric capacity etc.) electric energy management system.Energy during braking catches the low efficiency that can alleviate and originally be introduced by traditional friction braking again.In regeneration brake system, when desired braking, electrical motor can be used as electrical generator, opposing traveling in the movement direction.The electric energy that electrical motor produces when taking on electrical generator is converted into the form that can be accepted and recharge for the battery to vehicle, electric capacity etc.Regeneration brake system usually and hydraulic brake system (also namely traditional friction braking system) is collaborative uses.
At the upper set regeneration brake system 120 of vehicle described above especially elec. vehicle (EV), refer in particular to and include motor, motor driver, the electrical energy storage device electric energy storage equipment of recharging (can), the regeneration brake system of this type is arranged for and makes car brakeing by regenerative brake and produce electric energy.In such process of regenerative braking, the motor of vehicle is used as electrical generator, opposing traveling in the movement direction.
Certainly, in other embodiments, aforesaid vehicle can also be such as utilize electrical network to provide electric energy to realize the tramway train, trackless trolley car, high speed train etc. that drive, under these examples, the electric energy that regeneration brake system produces will be fed in electrical network, in order to recycling by suitable mode.
In further embodiments, aforesaid vehicle can also be the vehicle of fuel cell-driven, such as hydrogen cell, SOFC etc., these batteries will not supplement in the mode of simply charging by aforementioned again, therefore in this class vehicle, regeneration brake system can comprise some other forms of energy storing devices, such as flywheel, when regenerative brake occurs, by some machinery and/or electron steering, kinetic energy is converted to store with the energy of flywheel rotated versions, be beneficial to follow-up application.
This kind of energy regenerating mode, the KERS kinetic energy recovery system that existing vehicle such as, provide, this kinetic energy recovery system single unit system will be arranged on the back axle of vehicle.During vehicle brake, the energy of dispersion can be pooled together by flywheel High Rotation Speed, flywheel maximum speed of revolution such as can design and reach 60000rpm.When vehicle starts mobile again, the energy that flywheel is collected before being passed out by rotation, is transferred to vehicle rear wheel by certain transmission device.
Certainly, in some other embodiments, aforesaid regeneration brake system 120 can also comprise some other forms of closed-center systems, such as compression air energy-storing apparatus, when regenerative brake occurs, by some machinery and/or electron steering, kinetic energy is converted to and stores with the energy of pressurized air form, be beneficial to follow-up utilization.
The energy regenerating form of this type, such as, store by one and the compression cylinder that releases energy and certain transmission device realize.Such as, the hybrid power system of a kind of HybridAir provided in existing vehicle, become with pneumatic groups of motors primarily of spark ignition engine, pressurized air memory system, in this cover hybrid dynamic system, pressurized air drives air motor to operate as energy source, thus realizes the recycling to pressurized air institute stored energy.
Certainly, in other example, can also be done work as automobile power by the compressed air-driven expansion engine that will store, the automobile power produced like this can be power-assisted also can be major impetus, so to realize the recycling to pressurized air institute stored energy.
In example shown in Fig. 2, this regeneration brake system 120 is configured to include at least one motor, motor driver and the storage battery (such as lead-acid battery, lithium cell, nickel-cadmium cell etc.) as energy storing device.Obviously, also such as electric capacity, electrical network etc. can be configured to as energy storing device.
Certainly, as previously mentioned, in necessary or suitable, aforesaid regeneration brake system 120 can also arrange a DC/DC conv further.
Obviously, such regeneration brake system is only exemplary, and as described by the above content of the disclosure, regeneration brake system 120 involved in the present invention is not as restriction.
Be equipped with in the vehicle of regeneration brake system 120 at these, when brake pedal is depressed, the movable information of inductive brake pedal is carried out by such as pedal stroke sensor 152 described above and/or angular transducer 153, and in response to this movable information, the required brake torque of computing driver is carried out (certainly by aforementioned control unit 110, if necessary, speed and/or the acceleration information of brake pedal can also be comprised), and distribute regenerative braking torque and hydraulic braking moment of torsion accordingly.Applying based on regenerative braking torque and/or hydraulic braking moment of torsion makes car retardation.
As favourable mode, control unit 110 can be configured to priority allocation and use regenerative braking torque to make car brakeing, and namely whole composite braking system is configured to preferentially use regenerative brake to brake.
Now, control unit 110 also can be configured to the distribution carrying out regenerative braking torque based on the maximum renewable brake torque of aforementioned regeneration brake system 120 further.
The maximum renewable brake torque of aforementioned regeneration brake system depends on the ceiling capacity recovery ability that regenerative braking system for vehicle 120 is current, the current driving power that torque peak, recharge rate of cell, motor driver are provided of such as, motor in regeneration brake system 120, these influence factors are as the realization preferably adopted based on Bucket Principle (short-board effect), and the ceiling capacity recovery ability that namely regeneration brake system 120 is current depends on the short slab factor in these factors.The factors such as the driving power of the current available torque peak of these motors, recharge rate of cell, motor driver, obtain by account form commonly known in the art, and judge that the current ceiling capacity of regeneration brake system 120 reclaims ability accordingly.
Such as, if power storage cell is close to fully charged state, then exceed full charge owing to charging, therefore the maximum renewable brake torque of regeneration brake system reduces; Otherwise if storage battery is close to empty charge condition, then the maximum renewable brake torque of regeneration brake system increases.
When control unit 110 carries out brake torque distribution and the braking result that regeneration brake system 120 reaches still is not enough to the braking requirement met required by driver, then produce drive singal based on the brake torque required by driver and the difference moment of torsion of the moment of torsion being dispensed to regeneration brake system 120, drive described linear electromagnetic actuator 130, it is made to produce corresponding thrust, the piston 140a promoting master brake cylinder 140 moves, thus produces braking force.
In this instance, by regeneration brake system 120 and the hydraulic brake system combined action primarily of part formations such as master brake cylinders 140, the car brakeing that driver requires is realized.
Certainly, as it has been described above, when the brake torque required by driver is fully allocated to regeneration brake system 120, when namely using regenerative brake can meet the braking requirement required by driver, then do not need to rely on hydraulic brake system again to brake, also namely aforesaid linear electromagnetic actuator 130 will no longer driven in such cases.
Figure 3 shows that the concrete example realized based on brake system shown in earlier figures 1, wherein mentioned in earlier figures 1 linear electromagnetic actuator 130 includes movable part 130a and fixed part 130b (certainly, fixed part and movable part are sheathed in the example shown, 3 both side surface being positioned at the housing arranged therebetween in the drawings), this movable part 130a is designed to the thrust being produced the piston 140a promoting described master brake cylinder 140 when this linear electromagnetic actuator drives, thus promotes piston movement generation braking force.
In Fig. 3, exemplarily indicate the compensation flow container 140e of master brake cylinder 140.
In this example, second transmission mechanism 180 is configured to horizontal " convex " shape structure of a T-shaped, there is the salient that substrate is protruded in a substrate and, the movable part 130a of described substrate and linear electromagnetic drive division 130 fixes, such as by realizations such as bolts, this second transmission mechanism 180 is linked with the movable part 130a of linear electromagnetic drive division 130.Aforementioned salient is configured to the shape protruding aforementioned substrates, and protrudes towards the direction of master brake cylinder 140.
Certainly, in other example, the second transmission mechanism 180 also can not be set, but be moved by the piston 140a that the motion of the movable part 130a of linear electromagnetic drive division 130 directly promotes aforementioned master brake cylinder 140.
In the brake system shown in Fig. 3, cylindrical case between the movable part 130a of linear electromagnetic actuator 130 and fixed part 130b can be used as the shell of linear electromagnetic actuator, meanwhile, this shell also can provide support by the component part simultaneously or for brake system together with other shell component.
In this brake system, as shown in Figure 3, the movable part 130a of linear electromagnetic actuator 130 not adopts fixing connection mode with aforesaid first transferring structure 151 (such as a connecting rod), but adopt on-fixed connection mode, make to be formed between brake pedal 150 and linear electromagnetic actuator 130 mechanically decoupled, thus it is mechanically decoupled to realize between brake pedal 150 and master brake cylinder 140.
On the one hand, ensure that the line traffic control of car brakeing realizes.On the other hand, when linear electromagnetic actuator 130 lost efficacy, whole brake system still can carry out braking in emergency circumstances and recovery, prevented brake safe accident.
Figure 4 shows that another the concrete example realized based on brake system shown in earlier figures 1, wherein mentioned in earlier figures 1 linear electromagnetic actuator 130 includes movable part 130a and fixed part 130b, this movable part 130a is designed to the thrust being produced the piston 140a promoting described master brake cylinder 140 when this linear electromagnetic actuator drives, thus promotes piston movement generation braking force.
On the basis of the brake system shown in Fig. 3, brake system in this example further comprises a brake feel feedback mechanism, be arranged in described braked channel, for providing the resistance hindering described brake pedal 150 to advance when braking and needing generation, this resistance is applied on described brake pedal 150 by direct or indirect transfer mode, thus provide brake feel to feed back to driver, thus realize the feedback of pedal brake sensation in an advantageous manner when braking requirement occurs.
As an example, aforesaid brake feel feedback mechanism recovers mechanism by an elasticity and realizes, and spring 161 as shown in Figure 4, especially coil spring, now carries brake feel feedback mechanism.When braking requirement occurs (when brake pedal 150 is depressed), especially the incipient stage, aforementioned first transmission mechanism 151 (as shown being the connecting rod hinged with brake pedal) is made to have towards the stroke of linear electromagnetic actuator 130, now provided by aforesaid spring 161 and hinder the progressive resistance in its side towards linear electromagnetic actuator 130, thus provide brake feel to feed back to driver.
Preferably, in the example shown in Figure 4, aforementioned connecting rod 151 is provided with a stop part 172, such as be integrally formed with described connecting rod 151 or process is mounted on it, be suitable for can making when described connecting rod 151 is subject to the transmission of power when brake pedal is trampled and moves towards described linear motor driver 130 spring 161 the resistance that produces be applied on this connecting rod 151, thus be applied to further on brake pedal 150, realize the realization of pedal brake sense feedback.
In further alternative scheme, a guide piece 171 can also be set between aforementioned brake pedal 150 and linear electromagnetic actuator 130, for providing the motion guide of aforementioned connecting rod 151, this guide piece 171 can be configured in multiple position, such as, in the example shown in Figure 4, this guide piece 171 is arranged between aforementioned spring 161 and described linear electromagnetic actuator 130, therefore, this guide piece 171 additionally provides the fixed position of described spring 161 simultaneously, and the other end of spring 161 can be fixed or fluidly abut on the stop part 172 of described connecting rod 151.
Obviously, linear electromagnetic actuator 130 can arrange self linear motion guide device usually, and linear electromagnetic actuator itself is dissolved in the design of this guide piece usually, repeats no more in the disclosure.
In some instances, guide piece 171 is configured to the parts with the through hole that connecting rod 151 passes through described in a tolerable.In some other examples, this guide piece 171 can also be configured to the spherical structure of honeycomb.Certainly, the structure of guide piece 171 not with this list for restriction.
In the scheme of other embodiments, aforementioned brake feel feedback mechanism can also realize by a straight line electromagnetic driver, in the brake system represented by Fig. 5, gives example explanation to this embodiment.
In brake system shown in Fig. 5, linear electromagnetic actuator as brake feel feedback mechanism comprises the fixed part that the movable part that represents with label 160a and label 160b represent, this linear electromagnetic actuator is provided in when being driven provides the resistance hindering described brake pedal 150 to advance to provide brake feel to feed back to driver via its movable part 160a.
Be to be understood that, in this example, as shown in Figure 5, as the linear electromagnetic actuator of brake feel feedback mechanism, its drive singal derives from the control unit of vehicle, such as aforesaid control unit 110, by this control unit 110 based on driver for brake pedal 150 operation required by brake torque and produce.In other example, the drive singal as the linear electromagnetic actuator of brake feel feedback mechanism derives from an other control unit (as independent for controlling the ECU of Brake feedback sensation).
Preferably, the corresponding relation for hindering described brake pedal 150 brake torque advanced required by resistance and driver to be configured to according to setting produced by this linear electromagnetic actuator, and produce drive singal based on this.Aforementioned corresponding relation such as linear relationship, nonlinear relationship etc., or can be the form mapping relations set.
Preferably, conduct second push rod 181 also comprised in brake system shown in Fig. 5, the movable part 160a of its first end and the described linear electromagnetic actuator as brake feel feedback mechanism fixes and the two is linked, second end points to the described linear electromagnetic actuator as supercharging actuator and (forms primarily of movable part 130a, fixed part 130b, certainly also comprise inner wiring, connection terminal etc.) direction, and be separated with described movable part 130a, keep at a certain distance away on braked channel therebetween.
As shown in the figure, as the connecting rod 151 of the first transmission mechanism, its one end is still hinged to brake pedal 150, and the other end is fixed to the first end of described second push rod 181.
So, when brake pedal 150 is trampled, described connecting rod 151 is made to have corresponding stroke, thus the movable part 130a promoting to link towards the described linear motor driver as supercharging actuator as the movable part 160a of the linear electromagnetic actuator of brake feel feedback mechanism and the second push rod 181 moves, simultaneously, after receiving the brake pedal movement state information of pedal travel sensor acquisition, described control unit 110 carries out computing and controls to produce the drive singal of the drive singal of the described linear electromagnetic actuator as brake feel feedback mechanism and the linear motor driver as supercharging actuator, and making two linear electric motors be operated in different patterns respectively accordingly: the linear motor driver as supercharging actuator is subject to driving the rear thrust producing the piston 140a motion promoting described master brake cylinder 140, and be subject to driving rear generation hinder the resistance (also showing as thrust) of described brake pedal 150 advance and be applied on brake pedal 150 via described connecting rod 151 as the linear electromagnetic actuator of brake feel feedback mechanism.
Obviously, described by above content, even if the linear motor driver as supercharging actuator breaks down or unforeseen circumstances, still can by driver's trampling by more great dynamics, the stroke of connecting rod 151 is strengthened and promotes the second push rod 181 (the second push rod 151 links with the movable part 160a of linear electromagnetic actuator) further, make it abut the second transmission mechanism 180 linked with the movable part 130a of the linear motor driver as supercharging actuator, promoted the piston 140a of master brake cylinder 140 by the second transmission mechanism 180.Thus the thrust from brake pedal 150 is delivered on the piston 140a of master brake cylinder 140, promote its motion to produce braking force, realize unexpected or in emergency circumstances car brakeing.
Certainly, in further embodiments, aforesaid second push rod 181 can not also be set, in this kind of example, one end as the connecting rod 151 of the first transmission mechanism is hinged to brake pedal 150, its other end is fixed on the movable part 160a of linear electromagnetic actuator, certain connection therebetween can adopt suitable structure to coordinate, the position be such as connected on connecting rod 151, with movable part 160a is configured to have larger size, thus be beneficial to and be directly connected with movable part 160a by screw or welding manner, but not as restriction.
Obviously, in some other embodiments, aforesaid brake feel feedback mechanism can also be recover mechanism 161 by least one elasticity to realize with the combination of at least one linear electromagnetic actuator (primarily of 160a, 160b composition), and this at least one elasticity recovery mechanism 161 and at least one linear electromagnetic actuator jointly or separately provide and hinder the resistance of described brake pedal advance to provide brake feel to feed back to driver.As preferred scheme, at least one elasticity aforementioned is recovered in mechanism 161 and at least one linear electromagnetic actuator, at least one linear electromagnetic actuator described can be configured to more close to described brake pedal 150, and the brake system realized like this has done corresponding expression in the example shown in Fig. 6.
Obviously, such combination implementation, reaching the effect of brake feel feedback advantageously, is that those skilled in the art's training centre according to the present invention easily realizes.
And in further embodiments, aforesaid brake feel feedback mechanism can also pass through return spring (torsion spring) and realize, now this return spring can be set directly at as Fig. 1 or Fig. 2, or in more embodiment, be arranged in the position near such as angular transducer 153, this position is also furnished with a hinge usually, return spring is in the circular movement around direction, the spring center of circle, but not straight-line motion when series connection, mode so adopts in the brake pedal unit of existing such as Toyota company, repeat no more in content of the present disclosure.
Obviously, in other examples, aforesaid return spring and helical spring embodiment can also realize simultaneously in a brake system.Even can also arrange with the aforesaid linear electromagnetic actuator as brake feel feedback mechanism simultaneously.
Or be linear electromagnetic actuator as brake feel feedback mechanism, with the one in aforesaid return spring or coil spring, carry out compound setting, be co-located in the braked channel of vehicle, the realization that brake feel feeds back is provided.
Simultaneously, in multiple embodiment above or described below, the design plan of this return spring can be configured in these brake system simultaneously, be to be understood that, such design can't cause or form somewhat complex design, and for existing design, under aforementioned instruction proposed by the invention, return spring is applied in the position at aforementioned angular sensor 153 place or neighbouring position as the part recovering mechanism, for providing brake feel to feed back on the one hand, the restoring force providing brake pedal to reset on the other hand, for those skilled in the art's institute's easy understand and realization.
Obviously, be to be understood that, in other examples, coil spring can also be configured in other positions, according to the instruction of aforementioned one or more embodiment of the present invention, in order to make this coil spring produce the resistance hindering pedal to advance, its position and annexation should be understood and realize.
In the disclosure, also proposed an a kind of specific implementation based on brake system shown in Fig. 2, as shown in Figure 7, in this brake system, linear electromagnetic actuator 130 mentioned in earlier figures 2 includes movable part 130a and fixed part 130b (certainly, similarly, fixed part and movable part are sheathed in the example shown, 7 both side surface being positioned at the housing arranged therebetween in the drawings), this movable part 130a is designed to the thrust being produced the piston 140a promoting described master brake cylinder 140 when this linear electromagnetic actuator drives, thus promote piston movement generation braking force.
In Fig. 7, exemplarily indicate the compensation flow container 140e of master brake cylinder 140.
In this example, second transmission mechanism 180 is still configured to horizontal " convex " shape structure of a T-shaped, there is the salient that substrate is protruded in a substrate and, the movable part 130a of described substrate and linear electromagnetic drive division 130 fixes, such as by realizations such as bolts, this second transmission mechanism 180 is linked with the movable part 130a of linear electromagnetic drive division 130.Aforementioned salient is configured to the shape protruding aforementioned substrates, and protrudes towards the direction of master brake cylinder 140.
Certainly, in other example, the second transmission mechanism 180 also can not be set, but be moved by the piston 140a that the motion of the movable part 130a of linear electromagnetic drive division 130 directly promotes aforementioned master brake cylinder 140.
In the brake system shown in Fig. 7, cylindrical case between the movable part 130a of linear electromagnetic actuator 130 and fixed part 130b can be used as the shell of linear electromagnetic actuator, meanwhile, this shell also can provide support by the component part simultaneously or for brake system together with other shell component.
A regeneration brake system 120 is further comprises in the brake system of this example, as aforementioned description, regeneration brake system 120 is arranged to and makes car retardation by regenerative brake.
Regeneration brake system 120, such as includes the regeneration brake system of storage battery, motor, motor driver, makes car brakeing and produces electric energy, be stored in storage battery by regenerative brake.In such process of regenerative braking, the motor of vehicle is used as electrical generator when regenerative brake, opposing vehicle traveling in the movement direction.
Certainly, as it has been described above, the realization of regeneration brake system 120 is not as restriction, it can also be the regeneration brake system comprising energy accumulation device for fly wheel or compression air energy-storing apparatus, according to instruction of the present invention, the application of these regeneration brake systems in brake system of the present invention easily realizes, and repeats no more in the disclosure.
Have in the brake system of regeneration brake system 120 at these, control unit 110 is arranged to the distribution carrying out regenerative braking torque, when driver's brake torque trampled required by brake pedal 150 is greater than the maximum renewable brake torque of regeneration brake system, therebetween difference is dispensed to by this control unit 110 and produces braking force by master brake cylinder 140 thus reach the braking requirement required by driver, now control unit 110 produces the drive singal driving the described linear electromagnetic actuator as supercharging actuator based on aforementioned difference, this linear electromagnetic actuator is made to be produced the thrust of the piston 140a motion promoting described master brake cylinder 140 when driving.
Obviously, in the brake system represented by Fig. 7, disclosed brake feel feedback mechanism described in multiple embodiment above, the brake feel feedback mechanism especially described by Fig. 4, Fig. 5, Fig. 6 can be applied in an advantageous manner in the brake system of this example.According to the instruction of the above embodiment of the disclosure, such application easily realizes.
In one or more embodiment described above, especially in the brake system as shown in Fig. 1-Fig. 7, as the linear electromagnetic actuator 130 of supercharging actuator, its movable part both sides are arranged allows and is beneficial to the motion of the movable part of linear electromagnetic actuator 130 by the passage that gas circulates.Such passage, such as between movable part and its housing, leave certain minim gap, or formed on the second transmission mechanism 180 of aforementioned setting or arrange and allow the through hole that gas passes through, or extra gas is installed by pipeline etc. in the both sides being positioned at movable part on the housing.In a word, it is to make the movable part of the linear electromagnetic actuator 130 as supercharging actuator be moved expediently that such gas passage is arranged, and can not be subject to too large resistance, or causes due to the hermetic design of housing moving.
Equally, devising in the linear electromagnetic example of actuator as brake feel feedback mechanism, the motion that similar aforesaid gas passage is beneficial to its movable part can be set equally.
In each embodiment described above, especially in the brake system described by Fig. 1-Fig. 7, although only depict the linear electromagnetic actuator (as linear electromagnetic actuator 130) that is used as supercharging actuator, be to be understood that, in other example, such supercharging actuator, two or more linear electromagnetic actuator can be adopted to realize, such as represented by Fig. 8, Fig. 9, all have employed two linear electromagnetic actuators in these examples and constitute aforesaid supercharging actuator.
Shown in composition graphs 8 and Fig. 9, considering the failure conditions of the aforementioned linear electromagnetic actuator as supercharging actuator, in order to improve the reliability of system, multiple linear electromagnetic actuator common implementing pressurizing action can be taked.Like this, even if wherein a certain linear electromagnetic actuator occurs abnormal, the supercharging that other actuators still can perform master brake cylinder drives.
On the arrangement of type of drive and multiple linear electromagnetic actuator, kinds of schemes can be adopted realize.
In some instances, these linear electromagnetic actuators preferably take series system to be configured in braked channel, making a concerted effort of the thrust of moving with the piston 140a forming to promote master brake cylinder 140.
In other examples, the mode that these linear electromagnetic actuators preferably take movable part to be separated from each other is configured in braked channel, thus can reach economize on electricity object in some conditions.
In other examples, these linear electromagnetic actuators preferably take the separate mode of fixed part to be configured in braked channel, at utmost to improve the reliability of system.
Certainly, in a further embodiment, aforesaid supercharging actuator, more linear electromagnetic actuator can also be adopted to realize, according to the instruction of the aforementioned disclosed embodiment of the present invention, these more the scheme of multi straight electromagnetic driver be easily realize, repeat no more.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (10)
1. for a brake system for vehicle, it is characterized in that, this brake system comprises:
Brake pedal;
Master brake cylinder;
Be arranged at the supercharging actuator on car brakeing path, be made up of at least one linear electromagnetic actuator, this linear electromagnetic actuator is provided in when it lost efficacy and is in the state that can be promoted by external freedom;
Wherein, formed between described brake pedal and described linear electromagnetic actuator mechanically decoupled; Described linear electromagnetic actuator response is subject to drive to produce thrust in driver to the operation of vehicle brake pedal, promotes the piston movement of the master brake cylinder of vehicle thus the braking force needed for generation, and:
This linear electromagnetic actuator is configured to when it lost efficacy in braked channel, and nationality directly makes the movable part of this linear electromagnetic actuator move towards the direction being conducive to the piston promoting master brake cylinder by driver to trampling further of brake pedal.
2. the brake system for vehicle according to claim 1, is characterized in that, the described brake system for vehicle comprises more:
One first transmission mechanism, is set up and is connected with brake pedal by hinge, and this first transmission mechanism has towards the corresponding stroke being conducive to promoting on the direction of brake master cylinder piston on braked channel when described brake pedal is trampled.
3. the brake system for vehicle according to claim 2, is characterized in that, mechanically decoupled between described first transmission mechanism and described linear electromagnetic actuator.
4. the brake system for vehicle according to Claims 2 or 3, is characterized in that, described first transmission mechanism comprises:
At least one is attached via a hinge to the first connecting rod of vehicle brake pedal, and one end of described first connecting rod is hinged to described brake pedal, has a transformable gap between the movable part of the other end and described linear electromagnetic actuator on braked channel.
5. the brake system for vehicle according to claim 4, is characterized in that, described supercharging actuator is made up of at least two linear electromagnetic actuators, these linear electromagnetic actuators:
1) be configured in a series arrangement in braked channel, when being driven to form making a concerted effort of the thrust of the piston movement in order to promote described master brake cylinder; Or
2) mode be separated from each other with movable part is configured in braked channel; Or
3) be configured in braked channel in the mode that fixed part is separate.
6. the brake system for vehicle according to claim 1, is characterized in that, the described brake system for vehicle comprises more:
One first brake feel feedback arrangement, is arranged on described braked channel, for providing the obstruction resistance that described brake pedal advances and being applied to brake pedal, to give brake feel feedback to driver.
7. the brake system for vehicle according to claim 6, it is characterized in that, described first brake feel feedback mechanism comprises at least one elasticity and recovers mechanism or at least one the second linear electromagnetic actuator as brake feel feedback arrangement, produces the resistance hindering described brake pedal to advance and is also applied on brake pedal.
8. the brake system for vehicle according to claim 6, it is characterized in that, described first brake feel feedback mechanism comprises at least one elasticity and recovers mechanism and at least one second linear electromagnetic actuator, and this at least one elasticity recovers mechanism and at least one linear electromagnetic actuator provides the resistance hindering described brake pedal to advance to give brake feel feedback to driver jointly or separately.
9. the brake system for vehicle according to claim 1, is characterized in that, the described brake system for vehicle comprises a regeneration brake system more, is arranged for and makes car brakeing by regenerative brake;
Brake torque needed for movement state information when the described brake system for vehicle is trampled based on described brake pedal calculates priority allocation regenerative braking torque are to make car retardation.
10. according to the brake system for vehicle according to claim 9, it is characterized in that, described regeneration brake system has at least one electric energy storage equipment, for generation of the device of electric energy and actuator, described actuator is arranged for and drives the described device for generation of electric energy, and the power storage that the device for generation of electric energy exports is at least one electric energy storage equipment described.
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| CN201510279776.6A CN105035062A (en) | 2015-05-27 | 2015-05-27 | High-safety vehicle braking system and braking method thereof |
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| CN201510279776.6A CN105035062A (en) | 2015-05-27 | 2015-05-27 | High-safety vehicle braking system and braking method thereof |
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| CN112298125A (en) * | 2019-07-31 | 2021-02-02 | 比亚迪股份有限公司 | Brake-by-wire system and vehicle |
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Application publication date: 20151111 |
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