CN218367760U - Dual-redundancy single-shaft electro-hydraulic brake system - Google Patents
Dual-redundancy single-shaft electro-hydraulic brake system Download PDFInfo
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- CN218367760U CN218367760U CN202222239989.4U CN202222239989U CN218367760U CN 218367760 U CN218367760 U CN 218367760U CN 202222239989 U CN202222239989 U CN 202222239989U CN 218367760 U CN218367760 U CN 218367760U
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Abstract
The utility model belongs to the technical field of the braking system technique and specifically relates to a dual redundant unipolar electricity liquid braking system. The utility model provides a dual redundant unipolar electric liquid braking system which characterized in that: brake fluid stock solution kettle be two cavate brake fluid stock solution kettle or three cavate brake fluid stock solution kettle, brake fluid stock solution kettle includes first stock solution chamber, second stock solution chamber, third stock solution chamber, left side brake control mechanism is connected in first stock solution chamber, right side brake control mechanism is connected in second stock solution chamber, left side brake control mechanism and right side brake 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 a brake control mechanism, an electromagnetic valve and a 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 condition of redundant control of a brake system is greatly increased under multiple failure conditions.
Description
Technical Field
The utility model belongs to the technical field of the braking system technique and specifically relates to a dual redundant unipolar electricity liquid braking system.
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 utility model discloses the content main objective is to comply with car electron drive-by-wire and intelligent trend, is different from the traditional central electro-hydraulic brake framework based on the solenoid valve realizes the senior brake function, the utility model provides a distributed brake framework based on the motor directly realizes the senior brake function, carries out the distributed application with unipolar (bridge) as the unit, has adapted to the following brake system to carry out the distributed application between the axles with the electrohydraulic and the electromechanical type, forms reasonable distributed combination; the redundant backup of 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 same braking effect as that of a traditional hydraulic braking system under the condition of power failure is also realized.
Disclosure of Invention
The utility model discloses an overcome prior art not enough, provide a dual redundant unipolar electricity liquid braking system, increased the redundant mode of brake control mechanism, solenoid valve and balanced valve, the working method is not single switching, start-up mode, but carries out freedom, nimble substitution working mode according to the inefficacy condition, deals with the condition of the redundant control of multiple inefficacy condition greatly increased braking system.
In order to realize the purpose, design a dual redundant unipolar electric liquid braking system, including brake fluid liquid storage kettle, its characterized in that: brake fluid stock solution kettle be two cavate brake fluid stock solution kettle or three cavate brake fluid stock solution kettle, brake fluid stock solution kettle includes first stock solution chamber, second stock solution chamber, third stock solution chamber, left side brake control mechanism is connected in first stock solution chamber, right side brake control mechanism is connected in second stock solution chamber, left side brake control mechanism and right side brake 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 brake fluid reservoir is connected with a manual brake mechanism in series between the left brake control mechanism and the right 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 a solenoid valve, the hydraulic output ends of a first fluid reservoir and a second fluid reservoir 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 solenoid valve and the right solenoid valve, the output end of the left solenoid valve is divided into two paths, one path is connected with a third fluid reservoir, and the other path is connected with the left 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 brake device is a lever type brake device or a pull rope type brake 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.
Compared with the prior art, the utility model, a dual redundant unipolar electricity liquid braking system is provided, the redundant mode of brake control mechanism, solenoid valve and balanced valve has been increased, and the working method is not single switching, start-up pattern, but carries out freedom, the nimble mode of replacement according to the inefficacy condition, deals with the condition of multiple inefficacy condition greatly increased braking system's redundant control.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic view of the connection 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 view of the scheme four of the present invention.
Fig. 5 is a schematic diagram of information interaction connection between sensors according to the present invention.
Fig. 6 is the utility model discloses solenoid valve, balanced valve and electric brake executor interconnect schematic diagram.
FIG. 7 is a schematic diagram of the principle of manual-triggered normal two-side independent electro-hydraulic braking.
FIG. 8 is a schematic view of the electro-hydraulic braking principle in a 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 will be further described 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 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 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, it is the utility model discloses under the system normal condition, when the work of manpower arrestment mechanism, the work of brake master cylinder 7, left side solenoid valve EMV1 and right side solenoid valve EMV2 are electrified simultaneously, like this, left side brake control mechanism and right side brake control mechanism are normal work simultaneously.
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 is failed, if so, executing 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 respectively controlled, and an alarm is sent to prompt maintenance as soon as possible.
The utility model discloses an use the scene for unipolar electricity liquid composite brake system, have dual 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 utility model takes the single shaft braking requirement as the target, controls the two sides of the shaft independently and backups redundant safety braking framework; the electric brake actuator has an ABS function and can independently adjust the side braking force; the hydraulic brake actuator at the wheel edge 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 among different shafts.
Claims (5)
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 (T3), 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 (T3), 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 manual brake mechanism is connected in series between the brake fluid reservoir (1) and the left and right brake control mechanisms, 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 axis 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222239989.4U CN218367760U (en) | 2022-08-25 | 2022-08-25 | Dual-redundancy single-shaft electro-hydraulic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222239989.4U CN218367760U (en) | 2022-08-25 | 2022-08-25 | Dual-redundancy single-shaft electro-hydraulic brake system |
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| Publication Number | Publication Date |
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| CN218367760U true CN218367760U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222239989.4U Active CN218367760U (en) | 2022-08-25 | 2022-08-25 | Dual-redundancy single-shaft electro-hydraulic brake system |
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| Country | Link |
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| CN (1) | CN218367760U (en) |
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2022
- 2022-08-25 CN CN202222239989.4U patent/CN218367760U/en active Active
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