KR20160104312A - Brake system for hybrid and electric vehicle, and control method thereof - Google Patents
Brake system for hybrid and electric vehicle, and control method thereof Download PDFInfo
- Publication number
- KR20160104312A KR20160104312A KR1020150027141A KR20150027141A KR20160104312A KR 20160104312 A KR20160104312 A KR 20160104312A KR 1020150027141 A KR1020150027141 A KR 1020150027141A KR 20150027141 A KR20150027141 A KR 20150027141A KR 20160104312 A KR20160104312 A KR 20160104312A
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- South Korea
- Prior art keywords
- regenerative braking
- braking device
- solenoids
- pair
- hydraulic
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
- B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
- B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/18—Propelling the vehicle
- B60Y2300/18008—Propelling the vehicle related to particular drive situations
- B60Y2300/18108—Braking
- B60Y2300/18125—Regenerative braking
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Fluid Mechanics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Regulating Braking Force (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention discloses a brake system of a hybrid and electric vehicle and a control method thereof. A regenerative braking device that performs regenerative braking by a drive motor that supplies drive power, a hydraulic braking device that performs hydraulic braking using hydraulic pressure, and a spring that connects a brake pedal and a booster that perform hydraulic braking A control unit for controlling the amount of regenerative braking torque or the amount of hydraulic braking torque by controlling a pair of solenoids based on a result of judging whether or not a failure occurs in a pair of facing solenoids and regenerative braking devices upon deceleration, .
In other words, by controlling the pair of solenoids based on the result of judging whether or not the regenerative braking device is malfunctioning, the spring is compressed or inflated to maximize the regenerative braking by the regenerative braking device, The efficiency of the regenerative braking device can be improved, and when the regenerative braking device fails, the hydraulic braking can be maximized to improve the functional safety.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a brake system of a hybrid vehicle and an electric vehicle having improved functional safety of regenerative braking and brake control, and a control method thereof.
Hybrid and electric vehicles are next-generation environmental vehicles in which an engine, which is an internal combustion engine, and a drive motor driven by electric energy stored in a battery are simultaneously mounted.
These hybrid and electric vehicles control the brake hydraulic pressure using an electronic-hydraulic brake (hereinafter referred to as "EHB device") composed of a pedal simulator and an actuator for generating a brake hydraulic pressure instead of a booster. These EHB units regulate regenerative braking and hydraulic braking in real time.
As described above, since the EHB device determines the hydraulic braking amount in real time according to the instantaneous change amount of the regenerative braking amount, the linearity of the braking feeling deteriorates due to system delay or the like.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a brake system for a hybrid vehicle and an electric vehicle having improved functional safety of regenerative braking and brake control, will be.
According to a first aspect of the present invention, there is provided a brake system for a hybrid vehicle and an electric vehicle, comprising: a regenerative braking device that performs regenerative braking by a drive motor that supplies drive power; A hydraulic braking device that performs hydraulic braking using hydraulic pressure; A pair of solenoids facing each other with a spring connecting the brake pedal and the booster performing the hydraulic braking interposed therebetween; And a control unit for controlling the regenerative braking torque amount or the hydraulic braking torque amount by controlling the pair of solenoids based on a result of judging whether or not the regenerative braking device is faulty at the time of deceleration to compress or expand the spring .
The control unit may include a failure management unit for monitoring a change in the regenerative braking torque that varies depending on a state of a driving motor or a battery for generating a regenerative braking force to determine whether the regenerative braking apparatus is malfunctioning.
The failure management unit generates a failure notification signal if the regenerative braking device fails, and generates a normal notification signal if the regenerative braking device fails.
The control unit generates a turn-on signal so that current is applied to the pair of solenoids when receiving the normal notification signal from the failure management unit. When the failure notification signal is received from the failure management unit, a current is supplied to the pair of solenoids And a solenoid control unit for generating a turn-off signal so as not to be applied.
The solenoid control unit increases the regenerative braking torque by maximizing the amount of regenerative braking torque by transmitting the turn-on signal to the pair of solenoids and compressing the spring when the regenerative braking device is not in trouble.
The solenoid control unit increases the hydraulic braking torque by maximizing the spring force by transmitting the turn-off signal to the pair of solenoids when the regenerative braking unit is in failure.
There is provided a hybrid electric vehicle including a regenerative braking device that performs regenerative braking by a drive motor that supplies drive power according to a second aspect of the present invention and a hydraulic braking device that performs fluid braking using hydraulic pressure, A method for controlling a brake of a vehicle, comprising the steps of: determining a failure of the regenerative braking device upon deceleration if a pair of solenoids are disposed opposite each other with a spring connecting the brake pedal and the booster performing the hydraulic braking interposed therebetween; And controlling the pair of solenoids to compress or expand the spring to thereby control the regenerative braking torque amount or the hydraulic braking torque amount.
Generating a turn-on signal so that current is applied to the pair of solenoids if the regenerative braking device is not malfunctioning; And generating a turn-off signal so that current is not applied to the pair of solenoids if the regenerative braking device is malfunctioning.
The step of generating the turn-on signal includes maximizing the regenerative braking torque by compressing the spring by transmitting the turn-on signal to the pair of solenoids when the regenerative braking device is not malfunctioning .
The step of generating the turn-off signal includes the step of maximizing the hydraulic damping torque amount by inflating the spring by transmitting the turn-off signal to the pair of solenoids when the regenerative braking device is in failure .
According to the brake system and the control method of the hybrid vehicle and the electric vehicle of the present invention, based on the result of determination of the failure of the regenerative braking device, a pair of solenoids facing each other with a spring connecting the brake pedal and the booster interposed therebetween, It is possible to maximize the regenerative braking by the regenerative braking device so as to improve the efficiency of the fuel economy. When the regenerative braking device is out of order, the hydraulic braking device Can be maximized to improve functional safety.
1 is a diagram showing an example of controlling a brake in a conventional hybrid vehicle and an electric vehicle.
2 is a schematic view of a brake system of a hybrid vehicle and an electric vehicle according to an embodiment of the present invention.
3 is a view showing an example in which a spring is controlled by a solenoid according to an embodiment of the present invention.
4 is a view showing another example in which the spring is controlled by the solenoid according to the embodiment of the present invention.
5 is a diagram showing the braking torque when the regenerative braking device shown in Fig. 2 is not malfunctioning.
Fig. 6 is a diagram showing the breaking torque when the regenerative braking device shown in Fig. 2 is not malfunctioning. Fig.
7 is a diagram showing the braking torque when the regenerative braking device shown in Fig. 2 fails. Fig.
8 is a diagram showing the breaking torque when the regenerative braking device shown in Fig. 2 fails. Fig.
9 is a flowchart showing a brake control method for a hybrid vehicle and an electric vehicle according to an embodiment of the present invention.
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
1 is a diagram showing an example of controlling a brake in a conventional hybrid vehicle and an electric vehicle.
1, an electronic-hydraulic brake (hereinafter referred to as "EHB device") for brake control is mounted on a conventional hybrid vehicle and an electric vehicle.
When the braking operation of the driver is detected by the detection sensor mounted on the brake pedal, the EHB apparatus changes the regenerative braking torque amount in accordance with the amount of electric power generated by the drive motor that generates the regenerative braking force and changes according to the instantaneous variation amount of the regenerative braking torque amount The hydraulic braking torque amount is determined.
In this hybrid and electric vehicle, regenerative braking force is required when braking or decelerating the vehicle. In order to regenerate braking, frictional braking by the brake pedal, that is, hydraulic braking, must be minimized.
However, when the EHB system is used, the regenerative braking torque and the hydraulic braking amount can be adjusted in real time. However, the linearity of the regenerative braking torque is deteriorated in a situation where the price is high and the system is delayed or failure occurs The hydraulic braking is not minimized so that the driver can not obtain the desired feel.
Hereinafter, a brake system of a hybrid vehicle and an electric vehicle having improved functional safety of regenerative braking and braking control according to an embodiment of the present invention will be described in detail.
2 is a schematic view of a brake system of a hybrid vehicle and an electric vehicle according to an embodiment of the present invention. 3 is a view showing an example in which a spring is controlled by a solenoid according to an embodiment of the present invention. 4 is a view showing another example in which the spring is controlled by the solenoid according to the embodiment of the present invention.
2, the
The regenerative braking device includes a drive motor (60) controlled by the regenerative braking control part (122) of the control part (120) to generate regenerative braking force. The driving
The hydraulic braking device includes a
The
When the regenerative braking torque generated by the drive motor 15 is large, the hydraulic
The regenerative
The
More specifically, the
The
More specifically, when the normal notification signal is received, the
On the other hand, when the failure notification signal is received, the
5 is a diagram showing the braking torque when the regenerative braking device shown in Fig. 2 is not malfunctioning. Fig. 6 is a diagram showing the breaking torque when the regenerative braking device shown in Fig. 2 is not malfunctioning. Fig. 7 is a diagram showing the braking torque when the regenerative braking device shown in Fig. 2 fails. Fig. 8 is a diagram showing the breaking torque when the regenerative braking device shown in Fig. 2 fails. Fig.
5 and 6, when the driver of the vehicle operating by the
The
First, when the state management signal is a normal announcement signal, the
On the other hand, when the state management signal is a failure notification signal, the
9 is a flowchart showing a brake control method for a hybrid vehicle and an electric vehicle according to an embodiment of the present invention.
9, in the
If it is determined in step S120 that the regenerative brake apparatus has failed, the
The
4) by the pair of
On the other hand, if it is determined in step S120 that the regenerative brake apparatus is not in failure, the
The
Then, the regenerative braking generated under the control of the regenerative
As described above, according to the operation method of the monitoring apparatus according to the embodiment of the present invention, it is possible to monitor the state transition between the activated state and the inactive state, It is possible to confirm and analyze the operation of the electronic control unit which caused the state change in the vehicle body network.
It should be understood that the functional operations and subject matter implementations described herein may be implemented as digital electronic circuitry, or may be embodied in computer software, firmware, or hardware, including the structures disclosed herein, and structural equivalents thereof, . Implementations of the subject matter described herein may be implemented as one or more computer program products, i. E. One or more modules relating to computer program instructions encoded on a type of program storage medium for execution by, or control of, the operation of the processing system Can be implemented.
The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that affects the machine readable propagation type signal, or a combination of one or more of the foregoing.
As used herein, the term " system "or" device "encompasses all apparatus, apparatus, and machines for processing data, including, for example, a programmable processor, a computer or a multiprocessor or computer. The processing system may, in addition to the hardware, comprise code that forms an execution environment for a computer program upon request, such as, for example, code comprising a processor firmware, a protocol stack, a database management system, an operating system, .
A computer program (also known as a program, software, software application, script or code) may be written in any form of programming language, including compiled or interpreted language, a priori or procedural language, Components, subroutines, or other units suitable for use in a computer environment. A computer program does not necessarily correspond to a file in the file system. The program may be stored in a single file provided to the requested program, or in multiple interactive files (e.g., a file storing one or more modules, subprograms, or portions of code) (E.g., one or more scripts stored in a markup language document). A computer program may be deployed to run on multiple computers or on one computer, located on a single site or distributed across multiple sites and interconnected by a communications network.
On the other hand, computer readable media suitable for storing computer program instructions and data include semiconductor memory devices such as, for example, EPROM, EEPROM and flash memory devices, such as magnetic disks such as internal hard disks or external disks, Non-volatile memory, media and memory devices, including ROM and DVD-ROM disks. The processor and memory may be supplemented by, or incorporated in, special purpose logic circuits.
Implementations of the subject matter described herein may include, for example, a back-end component such as a data server, or may include a middleware component, such as an application server, or may be a web browser or a graphical user, for example a user, who may interact with an implementation of the subject- Front-end components such as client computers with interfaces, or any combination of one or more of such back-end, middleware, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication, such as, for example, a communications network.
While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Likewise, the specific features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.
It is also to be understood that although the present invention is described herein with particular sequence of operations in the drawings, it is to be understood that it is to be understood that it is to be understood that all such illustrated acts have to be performed or that such acts must be performed in their particular order or sequential order, Can not be done. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood that
As such, the present specification is not intended to limit the invention to the specific terminology presented. Thus, while the present invention has been described in detail with reference to the above examples, those skilled in the art will be able to make adaptations, modifications, and variations on these examples without departing from the scope of the present invention. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.
10: Brake pedal 20: Booster
21: master cylinder 30: spring
40: Solenoid 50: Hydraulic brake regulator
60: drive motor 70: battery
100: Brake system of hybrid and electric vehicles
120: control unit 121: hydraulic braking control unit
122: Regenerative braking control unit 123:
124: Solenoid control unit
Claims (11)
A regenerative braking device that performs regenerative braking by a drive motor that supplies drive power;
A hydraulic braking device that performs hydraulic braking using hydraulic pressure;
A pair of solenoids facing each other with a spring connecting the brake pedal and the booster performing the hydraulic braking interposed therebetween; And
A control unit for controlling the regenerative braking torque amount or the hydraulic braking torque amount by controlling the pair of solenoids based on a result of judging whether or not the regenerative braking device has failed at the time of deceleration so as to compress or expand the spring,
Wherein the brake system comprises:
Wherein,
And a failure management unit for monitoring a change in the regenerative braking torque that varies depending on a state of a drive motor or a battery for generating a regenerative braking force to determine whether the regenerative braking apparatus is malfunctioning, .
The failure management unit,
And generates a failure notification signal if the regenerative braking device fails, and generates a normal notification signal if the regenerative braking device fails.
Wherein,
When receiving the failure notification signal from the failure management unit, generates a turn-on signal so that current is applied to the pair of solenoids when the normal notification signal is received from the failure management unit, Off signal to the solenoid control unit. ≪ Desc / Clms Page number 19 >
The solenoid control unit includes:
And when the regenerative braking device is not in failure, transmits the turn-on signal to the pair of solenoids to compress the spring, thereby maximizing the regenerative braking torque amount.
The solenoid control unit includes:
Wherein when the regenerative braking device is in failure, the hydraulic braking torque amount is maximized by transmitting the turn-off signal to the pair of solenoids to expand the spring.
If a pair of solenoids are disposed opposite each other with a spring connecting the brake pedal and the booster performing the hydraulic braking interposed therebetween,
Controlling the amount of regenerative braking torque or the amount of hydraulic braking torque by controlling the pair of solenoids based on a result of determining whether the regenerative braking device is faulty when decelerating, thereby compressing or expanding the spring
And a control unit for controlling the brake of the electric vehicle.
Wherein the controlling comprises:
Generating a turn-on signal so that current is applied to the pair of solenoids if the regenerative braking device is not malfunctioning; And
And generating a turn-off signal so that current is not applied to the pair of solenoids if the regenerative braking device is malfunctioning.
The step of generating the turn-
And a step of maximizing the regenerative braking torque by compressing the spring by transmitting the turn-on signal to the pair of solenoids when the regenerative braking device is not malfunctioning Brake control method.
The step of generating the turn-
And increasing the hydraulic braking torque by maximizing the amount of hydraulic braking torque by transmitting the turn-off signal to the pair of solenoids and expanding the spring when the regenerative braking device is out of order. Brake control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150027141A KR20160104312A (en) | 2015-02-26 | 2015-02-26 | Brake system for hybrid and electric vehicle, and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150027141A KR20160104312A (en) | 2015-02-26 | 2015-02-26 | Brake system for hybrid and electric vehicle, and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| KR20160104312A true KR20160104312A (en) | 2016-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020150027141A KR20160104312A (en) | 2015-02-26 | 2015-02-26 | Brake system for hybrid and electric vehicle, and control method thereof |
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| KR (1) | KR20160104312A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200115820A (en) * | 2019-03-27 | 2020-10-08 | 현대자동차주식회사 | Hybrid vehicle and method of braking control for the same |
| CN115583160A (en) * | 2022-10-31 | 2023-01-10 | 成都赛力斯科技有限公司 | Automobile sliding feedback control method and device, computer equipment and storage medium |
-
2015
- 2015-02-26 KR KR1020150027141A patent/KR20160104312A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200115820A (en) * | 2019-03-27 | 2020-10-08 | 현대자동차주식회사 | Hybrid vehicle and method of braking control for the same |
| CN115583160A (en) * | 2022-10-31 | 2023-01-10 | 成都赛力斯科技有限公司 | Automobile sliding feedback control method and device, computer equipment and storage medium |
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