CN115571102A - Dual-redundancy single-shaft electro-hydraulic brake system and control method - Google Patents

Dual-redundancy single-shaft electro-hydraulic brake system and control method Download PDF

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Publication number
CN115571102A
CN115571102A CN202211023428.9A CN202211023428A CN115571102A CN 115571102 A CN115571102 A CN 115571102A CN 202211023428 A CN202211023428 A CN 202211023428A CN 115571102 A CN115571102 A CN 115571102A
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China
Prior art keywords
brake
control mechanism
emv
electromagnetic valve
hydraulic
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CN202211023428.9A
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Chinese (zh)
Inventor
陈先典
李占磊
赵一鸣
于正虎
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Shanghai Automotive Brake Systems Co Ltd
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Shanghai Automotive Brake Systems Co Ltd
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Priority to CN202211023428.9A priority Critical patent/CN115571102A/en
Publication of CN115571102A publication Critical patent/CN115571102A/en
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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
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • 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
    • B60T2270/40—Failsafe aspects of brake control systems

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)

Abstract

The invention relates to the technical field of brake systems, in particular to a dual-redundancy single-shaft electro-hydraulic brake system and a control method. The utility model provides a dual redundant unipolar electricity liquid braking system which characterized in that: brake fluid liquid storage kettle be two chamber formula brake fluid liquid storage kettle or three chamber formula brake fluid liquid storage kettle, brake fluid liquid storage kettle includes first stock solution chamber, second stock solution chamber, third stock solution chamber, left side braking control mechanism is connected to first stock solution chamber, right side braking control mechanism is connected to second stock solution chamber, left side braking control mechanism and right side braking control mechanism between connect through a plurality of balanced valves to a plurality of balanced valves are parallel connection. Compared with the prior art, redundant modes of the brake control mechanism, the electromagnetic valve and the balance valve are added, the working mode is not a single switching and starting mode, the working mode is freely and flexibly replaced according to failure conditions, and the redundant control condition of the brake system is greatly increased under multiple failure conditions.

Description

Dual-redundancy single-shaft electro-hydraulic brake system and control method
Technical Field
The invention relates to the technical field of brake systems, in particular to a dual-redundancy single-shaft electro-hydraulic brake system and a control method.
Background
The traditional central electro-hydraulic brake system architecture generally only performs redundant backup on electrical elements, and if complex function backup is required, an additional system is required; the new distributed electromechanical braking system can hardly realize manual braking under the condition of power failure or the manual braking structure is very complicated and has low efficiency.
The invention mainly aims to comply with the trend of electronic wire control and intellectualization of automobiles, and is different from the traditional central electro-hydraulic brake architecture for realizing the advanced brake function based on an electromagnetic valve; the redundant backup of the functions in the same module is realized through the electromagnetic valves in the same module and the two sets of controllers independently supplying power, and the braking effect which is the same as that of the traditional hydraulic braking system under the condition of power failure is also realized.
Disclosure of Invention
The invention provides a double-redundancy single-shaft electro-hydraulic brake system and a control method for overcoming the defects of the prior art, wherein the redundancy modes of a brake control mechanism, an electromagnetic valve and a balance valve are added, the working mode is not a single switching and starting mode, but the working mode is freely and flexibly replaced according to failure conditions, and the redundancy control condition of the brake system is greatly increased under multiple failure conditions.
In order to realize above-mentioned purpose, design a dual redundant unipolar electric liquid braking system, including brake fluid liquid storage kettle, its characterized in that: brake fluid liquid storage kettle be two chamber formula brake fluid liquid storage kettle or three chamber formula brake fluid liquid storage kettle, brake fluid liquid storage kettle includes first stock solution chamber, second stock solution chamber, third stock solution chamber, left side braking control mechanism is connected to first stock solution chamber, right side braking control mechanism is connected to second stock solution chamber, left side braking control mechanism and right side braking control mechanism between connect through a plurality of balanced valves to a plurality of balanced valves are parallel connection.
The left side brake control mechanism is consistent with the right side brake control mechanism in structure, the left side brake control mechanism comprises a left side electric brake actuator, a left side pressure sensor and a left side hydraulic brake, the first liquid storage cavity is respectively connected with the left side electromagnetic valve, the left side electric brake actuator and the left side hydraulic brake through lines, and the left side pressure sensor is connected to a connecting line of the left side electric brake actuator and the left side hydraulic brake.
The manual brake mechanism is connected in series between the brake fluid storage pot and the left side brake control mechanism and the right side brake control mechanism, the manual brake mechanism comprises a manual brake device, a stroke type brake intention sensor, a brake main cylinder, a pressure type brake intention sensor and an electromagnetic valve, the hydraulic output ends of the first liquid storage cavity and the second liquid storage cavity are connected with the hydraulic input end of the brake main cylinder, a piston push rod of the brake main cylinder is connected with the manual brake device, the hydraulic output end of the brake main cylinder is respectively connected with the input ends of the left side electromagnetic valve and the right side electromagnetic valve, the output end of the left side electromagnetic valve is divided into two paths, one path is connected with the third liquid storage cavity, and the other path is connected with the left side brake control mechanism; the output end of the right electromagnetic valve is divided into two paths, one path is connected with the third liquid storage cavity, and the other path is connected with the right brake control mechanism; a stroke braking intention sensor is connected on a line between the brake master cylinder and the manual braking device; and a pressure type braking intention sensor is connected on a line between the brake master cylinder and the left electromagnetic valve.
The manual braking device is a lever type braking device or a pull cable type braking device.
A redundant left electromagnetic valve is connected in series between the left electromagnetic valve and the left brake control mechanism; and a redundant right electromagnetic valve is connected in series between the right electromagnetic valve and the right brake control mechanism.
A control method of a dual-redundancy single-shaft electro-hydraulic brake system comprises a control method for failure on either side of the left side and the right side, a control method for simultaneous failure on the left side and the right side, and a control method for failure of a balance valve.
The specific flow of the control method for the failure of any side of the left side and the right side is as follows:
s11, judging whether all the left brake control mechanisms fail, if so, performing the step S12; otherwise, performing step S13;
s12, when the whole mechanism of the left brake control mechanism fails, the system directly starts the right brake control mechanism to brake the whole vehicle;
s13, when the left brake control mechanism is partially failed, the step S14 is carried out; otherwise, returning to the step S11;
s14, judging whether the left electromagnetic valve fails, if so, performing the step S18; otherwise, performing step S15;
s15, judging whether the left side pressure sensor fails, if so, performing the step S19; otherwise, performing step S16;
s16, judging whether the left electric brake actuator fails or not, if so, executing the step S20; otherwise, performing step S17;
s17, judging whether the left hydraulic brake fails, if so, performing the step S21; otherwise, returning to the step S13;
s18, when the left electromagnetic valve fails, the right electromagnetic valve of the right brake control mechanism replaces the left electromagnetic valve to continue working;
s19, when the left side pressure sensor fails, a backup algorithm is used for controlling braking force, and calibration and auxiliary control of the backup algorithm are carried out through a balance valve and the right side pressure sensor of the right side braking control mechanism;
s20, when the left electric brake actuator fails, the right electric brake actuator of the right brake control mechanism replaces the left electric brake actuator to continue to work;
s21, when the left hydraulic brake fails, the left pressure sensor displays failure data; step S19 is performed.
In the step S18, when the control circuit of the left electromagnetic valve fails, the right electromagnetic valve of the right brake control mechanism replaces the left electromagnetic valve to continue to operate; when the left electromagnetic valve is in mechanical failure, the left brake control mechanism is braked by the manual brake device, and the right brake control mechanism is jointly braked by the right electric brake actuator and the right hydraulic brake.
The specific flow of the control method for simultaneous failure of the left side and the right side is as follows:
and S21, when the brake control mechanisms on the left side and the right side are failed simultaneously, directly braking by a manual brake device.
The specific flow of the control method for the failure of the balance valve is as follows:
s31, when the balance valve fails, judging whether a redundant balance valve exists, if so, performing a step S32; otherwise, performing step S33;
s32, when a redundant balance valve is connected with the balance valve in parallel and the balance valve fails, the redundant balance valve is started to replace the balance valve to continue working;
and S33, when the redundant balance valve does not exist, the left brake control mechanism and the right brake control mechanism are controlled automatically respectively, and an alarm is sent to prompt maintenance as soon as possible.
Compared with the prior art, the redundancy control system and method based on the single-shaft electro-hydraulic double-check brake system are provided, the redundancy modes of the brake control mechanism, the electromagnetic valve and the balance valve are added, the working mode is not a single switching and starting mode, the working mode is freely and flexibly replaced according to failure conditions, and the redundancy control condition of the brake system is greatly increased under multiple failure conditions.
Drawings
Fig. 1 is a schematic connection diagram of the first embodiment of the present invention.
FIG. 2 is a schematic connection diagram of the second embodiment of the present invention.
Fig. 3 is a schematic diagram of the third connection scheme of the present invention.
Fig. 4 is a schematic diagram of the connection of the fourth embodiment of the present invention.
FIG. 5 is a schematic diagram of information interaction between sensors according to the present invention.
FIG. 6 is a schematic diagram of the interconnection of the solenoid valve, the balancing valve and the electric brake actuator according to the present invention.
FIG. 7 is a schematic diagram of the principle of manual-triggered normal two-side independent electro-hydraulic braking.
Fig. 8 is a schematic diagram of the electro-hydraulic braking principle in a one-side fault condition.
FIG. 9 is a schematic illustration of the principle of manual braking under a two-sided fault condition.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawings.
As shown in fig. 4, for a redundant system with a pure line control mode without human intervention, the brake fluid reservoir 1 is a two-chamber brake fluid reservoir, the brake fluid reservoir 1 includes a first reservoir T1 and a second reservoir T2, the first reservoir T1 is connected to the left brake control mechanism, the second reservoir T2 is connected to the right brake control mechanism, the left brake control mechanism and the right brake control mechanism are connected through a plurality of balancing valves EMV3, and the balancing valves EMV3 are connected in parallel.
The left side brake control mechanism is consistent with the structure of the right side brake control mechanism, the left side brake control mechanism comprises a left side electric brake actuator, a left side pressure sensor and a left side hydraulic brake, the first liquid storage cavity T1 is respectively connected with a left side electromagnetic valve EMV1, a left side electric brake actuator 2 and a left side hydraulic brake 4 through lines, and the left side pressure sensor 3 is connected on a connecting line of the left side electric brake actuator 2 and the left side hydraulic brake 4.
As shown in fig. 1 and 2, on the basis of a pure-by-wire mode, a redundant system of a man-made braking mode is added, a manual braking mechanism is connected in series between a brake fluid reservoir 1 and a left-side braking control mechanism and a right-side braking control mechanism, the manual braking mechanism comprises a manual braking device, a stroke braking intention sensor, a brake master cylinder, a pressure type braking intention sensor and an electromagnetic valve, hydraulic output ends of a first fluid reservoir T1 and a second fluid reservoir T3 are connected with a hydraulic input end of the brake master cylinder 7, a piston push rod of the brake master cylinder 7 is connected with the manual braking device 6, the hydraulic output end of the brake master cylinder 7 is respectively connected with input ends of a left-side electromagnetic valve EMV1 and a right-side electromagnetic valve EMV2, the output end of the left-side electromagnetic valve EMV1 is divided into two paths, one path is connected with a third fluid reservoir T0, and the other path is connected with the left-side braking control mechanism; the output end of the right electromagnetic valve EMV2 is divided into two paths, one path is connected with the third liquid storage cavity T0, and the other path is connected with the right brake control mechanism; a stroke braking intention sensor 5 is connected on a line between the brake master cylinder 7 and the manual braking device 6; and a pressure type braking intention sensor 8 is connected to a line between the brake master cylinder 7 and the left electromagnetic valve EMV 1.
The manual brake device is a lever type brake device or a pull cable type brake device.
As shown in fig. 7, when the manual brake mechanism works, the master cylinder 7 works, and the left electromagnetic valve EMV1 and the right electromagnetic valve EMV2 are simultaneously energized, so that the left brake control mechanism and the right brake control mechanism work normally at the same time.
As shown in fig. 3, on the basis of fig. 2, redundant modes are made for the left and right electromagnetic valves, and a redundant left electromagnetic valve EMV1' is connected in series between the left electromagnetic valve EMV1 and the left brake control mechanism; and a redundant right electromagnetic valve EMV2' is connected between the right electromagnetic valve EMV2 and the right brake control mechanism in series.
As shown in fig. 5 and 6, the redundant control method of the single-shaft electro-hydraulic brake system comprises a control method for failure on either side of the left side and the right side, a control method for simultaneous failure on the left side and the right side, and a control method for failure of the balance valve EMV 3.
The specific flow of the control method for the failure of any side of the left side and the right side is as follows:
s11, judging whether all the left brake control mechanisms fail, if so, performing the step S12; otherwise, performing step S13;
s12, when the whole mechanism of the left brake control mechanism fails, the system directly starts the right brake control mechanism to brake the whole vehicle;
s13, when the left brake control mechanism is partially failed, the step S14 is carried out if the left brake control mechanism is partially failed; otherwise, returning to the step S11;
s14, judging whether the left electromagnetic valve EMV1 is failed, if so, performing a step S18; otherwise, performing step S15;
s15, judging whether the left side pressure sensor 3 is failed, if so, executing the step S19; otherwise, performing step S16;
s16, judging whether the left electric brake actuator 2 fails, if so, performing the step S20; otherwise, performing step S17;
s17, judging whether the left hydraulic brake 4 fails, if so, performing the step S21; otherwise, returning to the step S13;
s18, when the left electromagnetic valve EMV1 fails, the right electromagnetic valve EMV2 of the right brake control mechanism replaces the left electromagnetic valve EMV1 to continue working;
s19, when the left side pressure sensor 3 fails, a standby algorithm is used for controlling braking force, and calibration and auxiliary control of the standby algorithm are carried out through the balance valve EMV3 and the right side pressure sensor of the right side braking control mechanism;
s20, when the left electric brake actuator 2 fails, the right electric brake actuator of the right brake control mechanism replaces the left electric brake actuator 2 to continue working;
s21, when the left hydraulic brake 4 fails, the left pressure sensor 3 displays failure data; step S19 is performed.
In step S18, when the control circuit of the left electromagnetic valve EMV1 fails, the right electromagnetic valve EMV2 of the right brake control mechanism replaces the left electromagnetic valve EMV1 to continue to operate, as shown in fig. 8; when the left electromagnetic valve EMV1 is in mechanical failure, the left brake control mechanism is braked by the manual brake device 6, and the right brake control mechanism is jointly braked by the right electric brake actuator and the right hydraulic brake.
As shown in fig. 9, when the left and right sides fail simultaneously, the specific flow of the control method of the system is as follows:
and S21, when the brake control mechanisms on the left side and the right side simultaneously fail, directly braking by the manual brake device 6.
The specific flow of the control method for the EMV3 failure of the balance valve is as follows:
s31, when the balance valve EMV3 fails, judging whether a redundant balance valve exists or not, and if so, performing the step S32; otherwise, performing step S33;
s32, when a redundant balance valve is connected with the balance valve EMV3 in parallel and the balance valve EMV3 fails, the redundant balance valve is started to replace the balance valve EMV3 to continue working;
and S33, when the redundant balance valve does not exist, the left brake control mechanism and the right brake control mechanism are controlled automatically respectively, and an alarm is sent to prompt maintenance as soon as possible.
The application scene of the invention is a single-shaft electro-hydraulic composite braking system, and the system has double braking redundancy performance. When one side electric control or brake fails, the other electric control and execution system can control the other side. When completely de-energized, a final back-up brake may be applied using manual or other mechanical force.
The invention takes the single-shaft braking requirement as a target, controls the left side of the two sides of the shaft independently and backups redundant safe braking frameworks; the electric brake actuator has an ABS function and can independently adjust the side braking force; the wheel edge hydraulic brake actuator has low cost and reliability; the device is distributed and suitable for multi-axle special vehicles; the brake is particularly suitable for new energy electric vehicles and the combination of wheel edge mechanical braking and hydraulic braking between different shafts.

Claims (10)

1. The utility model provides a dual redundant unipolar electric liquid braking system, includes brake fluid liquid storage kettle, its characterized in that: brake fluid liquid storage kettle (1) be two chamber formula brake fluid liquid storage kettle or three chamber formula brake fluid liquid storage kettle, brake fluid liquid storage kettle (1) includes first stock solution chamber (T1), second stock solution chamber (T2), third stock solution chamber (T0), left side braking control mechanism is connected in first stock solution chamber (T1), right side braking control mechanism is connected in second stock solution chamber (T2), left side braking control mechanism and right side braking control mechanism between connect through a plurality of balanced valves (EMV 3) to a plurality of balanced valves (EMV 3) are parallel connection.
2. A dual redundant single axis electro-hydraulic brake system according to claim 1, wherein: the left side brake control mechanism is consistent with the right side brake control mechanism in structure, the left side brake control mechanism comprises a left side electric brake actuator, a left side pressure sensor and a left side hydraulic brake, the first liquid storage cavity (T1) is respectively connected with a left side electromagnetic valve (EMV 1), a left side electric brake actuator (2) and a left side hydraulic brake (4) through lines, and the left side pressure sensor (3) is connected on a connecting line of the left side electric brake actuator (2) and the left side hydraulic brake (4).
3. A dual redundant single axis electro-hydraulic brake system according to claim 1, wherein: the brake fluid reservoir pot (1) and the left brake control mechanism and the right brake control mechanism are connected with a manual brake mechanism in series, the manual brake mechanism comprises a manual brake device, a stroke type brake intention sensor, a brake master cylinder, a pressure type brake intention sensor and a solenoid valve, hydraulic output ends of a first reservoir (T1) and a second reservoir (T3) are connected with a hydraulic input end of the brake master cylinder (7), a piston push rod of the brake master cylinder (7) is connected with the manual brake device (6), the hydraulic output end of the brake master cylinder (7) is respectively connected with input ends of a left solenoid valve (EMV 1) and a right solenoid valve (EMV 2), the output end of the left solenoid valve (EMV 1) is divided into two paths, one path is connected with a third reservoir (T0), and the other path is connected with the left brake control mechanism; the output end of the right electromagnetic valve (EMV 2) is divided into two paths, one path is connected with the third liquid storage cavity (T0), and the other path is connected with the right brake control mechanism; a stroke braking intention sensor (5) is connected on a line between the brake master cylinder (7) and the manual braking device (6); and a pressure type braking intention sensor (8) is connected on a line between the brake master cylinder (7) and the left electromagnetic valve (EMV 1).
4. A dual redundant single axle electro-hydraulic brake system according to claim 3, wherein: the manual braking device is a lever type braking device or a pull cable type braking device.
5. A dual redundant single axle electro-hydraulic brake system according to claim 3, wherein: a redundant left electromagnetic valve (EMV 1') is connected in series between the left electromagnetic valve (EMV 1) and the left brake control mechanism; and a redundant right-side electromagnetic valve (EMV 2') is connected between the right-side electromagnetic valve (EMV 2) and the right-side brake control mechanism in series.
6. A control method of a dual-redundancy single-shaft electro-hydraulic brake system is characterized by comprising the following steps: the redundancy control method comprises a control method for failure on either side of the left side and the right side, a control method for simultaneous failure on the left side and the right side, and a control method for failure of a balance valve (EMV 3).
7. The control method of a dual redundant single-axle electro-hydraulic brake system according to claim 6, wherein: the specific flow of the control method for the failure of any side of the left side and the right side is as follows:
s11, judging whether the left brake control mechanism is completely failed, if so, performing the step S12; otherwise, performing step S13;
s12, when the whole mechanism of the left brake control mechanism fails, the system directly starts the right brake control mechanism to brake the whole vehicle;
s13, when the left brake control mechanism is partially failed, the step S14 is carried out; otherwise, returning to the step S11;
s14, judging whether the left electromagnetic valve (EMV 1) is failed, if so, performing a step S18; otherwise, performing step S15;
s15, judging whether the left side pressure sensor (3) is failed, if so, performing the step S19; otherwise, performing step S16;
s16, judging whether the left electric brake actuator (2) fails, if so, executing the step S20; otherwise, performing step S17;
s17, judging whether the left hydraulic brake (4) fails, if so, performing the step S21; otherwise, returning to the step S13;
s18, when the left electromagnetic valve (EMV 1) fails, the right electromagnetic valve (EMV 2) of the right brake control mechanism replaces the left electromagnetic valve (EMV 1) to continuously work;
s19, when the left side pressure sensor (3) fails, a standby algorithm is used for controlling braking force, and calibration and auxiliary control of the standby algorithm are carried out through a balance valve (EMV 3) and the right side pressure sensor of the right side braking control mechanism;
s20, when the left electric brake actuator (2) fails, the right electric brake actuator of the right brake control mechanism replaces the left electric brake actuator (2) to continue to work;
s21, when the left hydraulic brake (4) fails, the left pressure sensor (3) displays failure data; step S19 is performed.
8. The control method of a dual redundant single-axle electro-hydraulic brake system according to claim 7, wherein: in the step S18, when the control circuit of the left electromagnetic valve (EMV 1) fails, the right electromagnetic valve (EMV 2) of the right brake control mechanism replaces the left electromagnetic valve (EMV 1) to continuously work; when the left electromagnetic valve (EMV 1) is in mechanical failure, the left brake control mechanism is braked by the manual brake device (6), and the right brake control mechanism is jointly braked by the right electric brake actuator and the right hydraulic brake.
9. The control method of a dual redundant single axle electro-hydraulic brake system according to claim 6, wherein: the specific flow of the control method for simultaneous failure of the left side and the right side is as follows:
and S21, when the brake control mechanisms on the left side and the right side are failed simultaneously, the manual brake device (6) directly brakes.
10. The control method of a dual redundant single-axle electro-hydraulic brake system according to claim 6, wherein: the specific flow of the control method for the failure of the balance valve (EMV 3) is as follows:
s31, when the balance valve (EMV 3) fails, judging whether a redundant balance valve exists or not, and if so, performing the step S32; otherwise, performing step S33;
s32, when a redundant balance valve is connected with the balance valve (EMV 3) in parallel, and the balance valve (EMV 3) is failed, the redundant balance valve is started to replace the balance valve (EMV 3) to continuously work;
and S33, when the redundant balance valve does not exist, the left brake control mechanism and the right brake control mechanism are respectively controlled, and an alarm is sent to prompt maintenance as soon as possible.
CN202211023428.9A 2022-08-25 2022-08-25 Dual-redundancy single-shaft electro-hydraulic brake system and control method Pending CN115571102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211023428.9A CN115571102A (en) 2022-08-25 2022-08-25 Dual-redundancy single-shaft electro-hydraulic brake system and control method

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Application Number Priority Date Filing Date Title
CN202211023428.9A CN115571102A (en) 2022-08-25 2022-08-25 Dual-redundancy single-shaft electro-hydraulic brake system and control method

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CN115571102A true CN115571102A (en) 2023-01-06

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