CN114734969A - Braking state loop of passive braking system - Google Patents
Braking state loop of passive braking system Download PDFInfo
- Publication number
- CN114734969A CN114734969A CN202210426654.5A CN202210426654A CN114734969A CN 114734969 A CN114734969 A CN 114734969A CN 202210426654 A CN202210426654 A CN 202210426654A CN 114734969 A CN114734969 A CN 114734969A
- Authority
- CN
- China
- Prior art keywords
- braking
- signal
- pressure switch
- relay
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- B60T8/17—Using electrical or electronic regulation means to control 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
- 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
- B60T13/12—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 the fluid being liquid
-
- 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
-
- 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
-
- 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
- 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
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- 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
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
-
- 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
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
- B60T8/1705—Braking or traction control means specially adapted for particular types of vehicles for rail vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
- B61H11/08—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes comprising a pump or the like circulating fluid, braking being effected by throttling of the circulation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a braking state loop of a passive braking system, which comprises: the auxiliary release device is internally provided with a first pressure switch for detecting a low-pressure signal of hydraulic oil, a second pressure switch for detecting a high-pressure signal of the hydraulic oil and a relay, the relay is provided with a normally closed contact and a normally open contact which are used for outputting a braking state signal of the vehicle, and the output signal of each braking state signal of the vehicle is connected into a braking state loop of the train in a parallel mode; the relay is driven by a fault signal output by the electronic braking unit and an output signal of a first pressure switch of the auxiliary relieving device in a parallel connection mode, a braking state signal output by the electronic braking unit is connected to a normally closed contact of the relay, and an output signal of a second pressure switch of the auxiliary relieving device is connected with a normally open contact of the normally closed relay. The braking state loop of the passive braking system can accurately reflect the braking state of a train no matter whether the electronic braking unit is in fault or not and whether the auxiliary relieving device is put into operation or not.
Description
Technical Field
The invention belongs to a design method of a braking state loop of a hydraulic braking system, which can be applied to the urban rail traffic fields of tramcars, rubber-tyred cars, suspended or straddle-type monorail cars and the like which are provided with passive hydraulic braking systems.
Background
The brake system generally comprises three major parts, namely an electronic brake control unit, a brake control device and a basic brake device. The electronic control unit calculates and controls the magnitude of the braking force according to the braking instruction of a train driver; the brake control device generates and outputs air or hydraulic oil pressure corresponding to the brake command to a brake cylinder in the basic brake device according to a control signal of the electronic control unit; the brake cylinder in the foundation brake device operates the driving mechanism to clamp the rotating brake disc according to the pressure output by the brake control device, thereby stopping the train.
The electronic control unit can output the working state of the brake system of the vehicle to the vehicle, and the working state is generally divided into two brake applying states and brake relieving states. Brake application means that the vehicle is currently in a braking state and there is a braking force to decelerate the vehicle; brake release means that the vehicle is currently in a braking force that does not decelerate the vehicle, and can accelerate or coast normally.
The braking state loop is an important function loop in the design of the train electric loop and generally consists of braking states of all the trains connected in series, and as long as any train reports no release, the train braking state loop is in a braking application state, and the train is not allowed to be pulled and accelerated.
Domestic motor train units and urban rail metro vehicles adopt straight-through brake systems, and compressed air is used as a transmission medium. That is, when the brake cylinders are charged, the vehicle applies the brakes, and when the brake cylinders are discharged, the brakes are released. When the brake system breaks down and needs to be isolated, pressure air output to the brake cylinder by the brake system is exhausted, the brake system reports a brake release state, and a train brake state loop is shown in figure 1.
The novel rail transit vehicles such as tramcars, monorail cars and the like generally adopt a brake system of a hydraulic medium due to the lack of equipment space. In addition, due to the fact that the gradient of the line is large, a spring-action brake cylinder is adopted to meet the requirement of ramp parking of the vehicle without electricity. That is, when the brake cylinder is charged with oil, no braking force is output from the brake cylinder, and the vehicle is in a brake release state. When the brake cylinder is discharged with oil, the brake cylinder outputs the acting force of the spring, and the vehicle is in a brake application state. Such an active braking system is referred to as a "passive hydraulic braking system".
When the brake system has a fault, the brake cylinder of the basic brake can be independently filled with oil through the independent auxiliary relieving device, so that the brake cylinder of the basic brake is in a 'brake relieving' state, the vehicle can be ensured to continue to run, and the passive hydraulic brake system is shown in a figure 2.
For a passive hydraulic brake system, when a fault of a certain passive hydraulic brake system needs to be isolated, a brake oil path corresponding to the output of the vehicle brake system is released, and the output state of the electronic brake control unit is 'brake application'. If the brake state circuit design in fig. 1 is adopted, the train brake state circuit is in a brake applying state, and the train cannot run. Therefore, it is necessary to design a circuit capable of correctly reflecting the braking state of the train according to the characteristics of the passive hydraulic braking system.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies in the prior art and providing a braking status circuit for a passive braking system.
In order to achieve the purpose of the invention, the technical scheme provided by the invention is as follows: a passive braking system braking status circuit comprising:
the auxiliary relieving device is internally provided with a first pressure switch for detecting a low-pressure signal of hydraulic oil and a second pressure switch for detecting a high-pressure signal of the hydraulic oil, when the auxiliary relieving device is not put into operation, the hydraulic oil is low-pressure, the first pressure switch is switched off, and the second pressure switch is switched on; when the auxiliary relieving device is put into operation but the internal oil pressure does not reach the relieving pressure, the first pressure switch and the second pressure switch are both closed; when the oil pressure in the auxiliary relieving device reaches the relieving pressure, the first pressure switch is closed, and the second pressure switch is opened;
the relay is provided with a normally closed contact and a normally open contact which are used as braking state signals of the vehicle, and the braking state signals of the vehicles are connected into a train braking state loop in a parallel mode; wherein the content of the first and second substances,
the relay is driven by the fault signal output by the electronic braking unit and the output signal of the first pressure switch of the auxiliary relieving device in a parallel connection mode, the braking state signal output by the electronic braking unit is connected to the normally closed contact of the relay, and the output signal of the second pressure switch of the auxiliary relieving device is connected with the normally open contact of the normally closed relay.
Under the condition of a fault, the electronic brake unit outputs a high-level brake state signal and simultaneously outputs a high-level fault signal; the electronic brake unit outputs a low-level fault signal in the absence of a fault.
The invention solves the problem that the traditional braking state loop can not be matched with a passive hydraulic braking system. The state loop of the invention can correctly reflect the real braking state of each vehicle provided with the passive hydraulic braking system no matter whether the passive hydraulic braking system has a fault, whether the auxiliary relieving device is put into use or not and whether the auxiliary relieving device works in place or not.
Drawings
FIG. 1 is a schematic diagram of a braking state circuit.
Fig. 2 is a schematic diagram of the composition of the passive hydraulic brake system.
FIG. 3 is a schematic diagram of a braking state circuit of the passive braking system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 3, the braking state circuit of the passive braking system includes: auxiliary release device, electronic brake unit and relay K.
The auxiliary release device is internally provided with a first pressure switch PS1 for detecting a low-pressure signal of the hydraulic oil and a second pressure switch PS2 for detecting a high-pressure signal of the hydraulic oil. When the auxiliary relieving device is not put into operation, hydraulic oil is low pressure, the first pressure switch PS1 is switched off, and the second pressure switch PS2 is switched on; when the auxiliary relieving device is in operation but the internal oil pressure does not reach the relieving pressure, the first pressure switch PS1 and the second pressure switch PS2 are both closed; when the internal oil pressure of the auxiliary relief device reaches the relief pressure, the first pressure switch PS1 is closed, and the second pressure switch PS2 is opened.
The relay K is provided with a normally closed contact K-12 and a normally open contact K-13 which are used as braking state signals of the vehicle to be output, and the braking state signals of the vehicles are connected into a train braking state loop in a parallel mode; wherein, the first and the second end of the pipe are connected with each other,
the relay K is driven by a fault signal output by the electronic brake unit and an output signal of the first pressure switch PS1 of the auxiliary release device in a parallel mode, a brake state signal output by the electronic brake unit is connected to a normally closed contact K-12 of the relay K, and an output signal of the second pressure switch PS2 of the auxiliary release device is connected to a normally open contact K-13 of the normally closed relay K.
Under the condition of a fault, the electronic braking unit outputs a high-level braking state signal and simultaneously outputs a high-level fault signal; the electronic brake unit outputs a low-level fault signal in the absence of a fault.
The working state of the hydraulic brake system can be divided into the following conditions:
working condition 1, no fault of electronic brake unit and no work of auxiliary relieving device
The electronic braking units have no fault signal output and the first pressure switch PS1 of the auxiliary relieving device has no voltage signal output, at the moment, the relay K is not electrified, the normally closed contact K-12 of the relay K is closed, the normally open contact K-13 is disconnected, and whether the train braking state loop is electrified or not is determined by the braking state signals output by the electronic braking units of each train; at this time, the train braking state circuit reflects the state of a hydraulic system controlled by the electronic braking unit of each vehicle, and when the electronic braking unit of any vehicle outputs a braking state signal, the train braking state circuit is powered on.
Working condition 2, failure of electronic brake unit and non-operation of auxiliary relieving device
The electronic brake unit simultaneously outputs a high-level brake state signal and a high-level fault signal; the relay K is electrified, the normally closed contact K-12 of the relay K is disconnected, the normally open contact K-13 is closed, and the braking state of the fault vehicle is obtained and the output signal of the second pressure switch PS2 of the device is relieved in an auxiliary mode; at this time, the auxiliary release device is not operated, the second pressure switch PS2 has a voltage signal output, and the faulty vehicle outputs a "brake applied" status signal to the train brake status circuit.
Working condition 3, the electronic braking unit is in fault and the auxiliary relieving device is put into operation
The electronic braking unit simultaneously outputs a high-level braking state signal and a high-level fault signal; the relay K is electrified, the normally closed contact K-12 of the relay K is disconnected, the normally open contact K-13 is closed, and the braking state of the fault vehicle is derived from the output signal of the second pressure switch PS2 of the auxiliary relieving device; when the auxiliary release device is pressurized to a release pressure, the second pressure switch PS2 has no voltage signal output and the faulty vehicle outputs a "brake release" status signal to the train braking status circuit.
Under the working condition 4, when the electronic brake unit is normal and the auxiliary relieving device is in operation but is not pressurized to the relieving pressure, the first pressure switch PS1 and the second pressure switch PS2 of the auxiliary relieving device both output voltage signals, the relay K is electrified, the normally closed contact K-12 of the relay K is disconnected, the normally open contact K-13 is closed, and the braking state comes from the output signal of the second pressure switch PS2 of the auxiliary relieving device; when the auxiliary release device is pressurized to the release pressure, the second pressure switch PS2 outputs no voltage signal, and the vehicle outputs a "brake release" state signal to the train brake state circuit.
The auxiliary relieving device usually adopts a manual operation mode and comprises a manual pump, an overflow valve, a one-way valve, a two-position two-way electromagnetic valve, a pressure switch, a pressure gauge, an oil tank and the like. The required hydraulic pressure can be established by operating the manual pump; the overflow valve limits the highest oil pressure output to the basic brake cylinder and plays a role in protecting system components; the check valve prevents hydraulic pressure from falling back when the manual pump is stopped; the pressure of hydraulic oil output by the current auxiliary relieving device can be checked through the pressure gauge; when emergency braking is carried out, the vehicle can make the pressure oil output by the auxiliary relieving device return to the oil storage tank through the two-position two-way electromagnetic valve under the electric linkage control, the auxiliary relieving function is cancelled, and the safety of the train is ensured. The auxiliary relieving device can also adopt a motor pump to replace a manual pump to realize a similar hydraulic principle.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present invention.
Claims (6)
1. A passive braking system braking status circuit comprising:
the auxiliary release device is internally provided with a first pressure switch (PS 1) for detecting a low-pressure signal of hydraulic oil and a second pressure switch (PS 2) for detecting a high-pressure signal of the hydraulic oil, when the auxiliary release device is not put into operation, the hydraulic oil is low-pressure, the first pressure switch (PS 1) is switched off, and the second pressure switch (PS 2) is switched on; when the auxiliary relieving device is in operation but the internal oil pressure does not reach the relieving pressure, the first pressure switch (PS 1) and the second pressure switch (PS 2) are closed; when the oil pressure in the auxiliary relieving device reaches the relieving pressure, the first pressure switch (PS 1) is closed, and the second pressure switch (PS 2) is opened;
the relay (K) is provided with a normally closed contact (K-12) and a normally open contact (K-13) which are used as the braking state signals of the vehicle, and the braking state signals of the vehicles are connected into a train braking state loop in a parallel mode; wherein, the first and the second end of the pipe are connected with each other,
the fault signal output by the electronic brake unit and the output signal of the first pressure switch (PS 1) of the auxiliary release device drive the relay (K) in a parallel connection mode, the brake state signal output by the electronic brake unit is connected to the normally closed contact (K-12) of the relay (K), and the output signal of the second pressure switch (PS 2) of the auxiliary release device is connected to the normally open contact (K-13) of the normally closed relay (K).
2. A passive braking system braking status circuit according to claim 1, characterized in that: under the condition of a fault, the electronic brake unit outputs a high-level brake state signal and simultaneously outputs a high-level fault signal; the electronic brake unit outputs a low-level fault signal in the absence of a fault.
3. A passive braking system braking status circuit according to claim 2, characterized in that: when the electronic brake unit has no fault and the auxiliary release device is not put into operation, the electronic brake unit has no fault signal output and the first pressure switch (PS 1) of the auxiliary release device has no voltage signal output, at the moment, the relay (K) is not electrified, the normally closed contact (K-12) of the relay (K) is closed, the normally open contact (K-13) is opened, and whether the train brake state loop is electrified or not is determined by the brake state signal output by each train electronic brake unit; at this time, the train braking state circuit reflects the state of a hydraulic system controlled by the electronic braking unit of each vehicle, and when the electronic braking unit of any vehicle outputs a braking state signal, the train braking state circuit is powered on.
4. A passive braking system braking status circuit according to claim 2, wherein: when the electronic brake unit fails and the auxiliary relieving device is not put into operation, the electronic brake unit simultaneously outputs a high-level brake state signal and a high-level fault signal; the relay (K) is electrified, a normally closed contact (K-12) of the relay (K) is disconnected, a normally open contact (K-13) is closed, and the braking state source of the fault vehicle assists in relieving the output signal of a second pressure switch (PS 2) of the device; at this time, the auxiliary release device is not activated, the second pressure switch (PS 2) outputs a voltage signal, and the faulty vehicle outputs a "brake applied" status signal to the train brake status circuit.
5. A passive braking system braking status circuit according to claim 2, characterized in that: when the electronic brake unit fails and the auxiliary relieving device is put into operation, the electronic brake unit simultaneously outputs a high-level brake state signal and a high-level fault signal; the relay (K) is electrified, a normally closed contact (K-12) of the relay (K) is disconnected, a normally open contact (K-13) is closed, and the braking state source of the fault vehicle assists in relieving the output signal of a second pressure switch (PS 2) of the device; when the auxiliary release device is pressurized to a release pressure, the second pressure switch (PS 2) does not output a voltage signal and the faulty vehicle outputs a 'brake release' status signal to the train braking status circuit.
6. A passive braking system braking status circuit according to claim 2, characterized in that: when the electronic brake unit is normal and the auxiliary release device is in operation but is not pressurized to release pressure, a first pressure switch (PS 1) and a second pressure switch (PS 2) of the auxiliary release device both output voltage signals, a relay (K) is electrified, a normally closed contact (K-12) of the relay (K) is disconnected, a normally open contact (K-13) is closed, and the output signal of the second pressure switch (PS 2) of the auxiliary release device is obtained from a braking state; when the auxiliary release device is pressurized to the release pressure, the second pressure switch (PS 2) outputs no voltage signal, and the vehicle outputs a brake release state signal to the train brake state circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210426654.5A CN114734969B (en) | 2022-04-22 | 2022-04-22 | Braking state loop of passive braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210426654.5A CN114734969B (en) | 2022-04-22 | 2022-04-22 | Braking state loop of passive braking system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114734969A true CN114734969A (en) | 2022-07-12 |
| CN114734969B CN114734969B (en) | 2023-06-09 |
Family
ID=82284409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210426654.5A Active CN114734969B (en) | 2022-04-22 | 2022-04-22 | Braking state loop of passive braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114734969B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3398993A (en) * | 1966-09-14 | 1968-08-27 | Westinghouse Air Brake Co | Load modulated combined dynamic and fluid pressure brake control system for railway cars |
| US4845463A (en) * | 1987-04-08 | 1989-07-04 | Navistar International Transportation Corp. | Brake system with auxiliary pump warning circuit |
| JPH07315209A (en) * | 1994-05-27 | 1995-12-05 | Akebono Brake Ind Co Ltd | Brake method of vehicle |
| CN102180165A (en) * | 2011-04-19 | 2011-09-14 | 铁道部运输局 | Method and system for preventing applied accidental parking brake on railway train |
| CN106740970A (en) * | 2016-12-14 | 2017-05-31 | 中车株洲电力机车有限公司 | Track train brake fluid system and its auxiliary relief device |
| CN207060025U (en) * | 2017-06-16 | 2018-03-02 | 中车长春轨道客车股份有限公司 | Rail vehicle rescues brake hard synchronization control circuit |
| CN109878488A (en) * | 2019-03-22 | 2019-06-14 | 嘉兴市钧萍轨道交通科技有限公司 | A kind of brake fluid system of subway train |
| CN211001349U (en) * | 2019-10-28 | 2020-07-14 | 中车南京浦镇车辆有限公司 | Rail transit vehicle magnetic track brake logic control system |
-
2022
- 2022-04-22 CN CN202210426654.5A patent/CN114734969B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3398993A (en) * | 1966-09-14 | 1968-08-27 | Westinghouse Air Brake Co | Load modulated combined dynamic and fluid pressure brake control system for railway cars |
| US4845463A (en) * | 1987-04-08 | 1989-07-04 | Navistar International Transportation Corp. | Brake system with auxiliary pump warning circuit |
| JPH07315209A (en) * | 1994-05-27 | 1995-12-05 | Akebono Brake Ind Co Ltd | Brake method of vehicle |
| CN102180165A (en) * | 2011-04-19 | 2011-09-14 | 铁道部运输局 | Method and system for preventing applied accidental parking brake on railway train |
| CN106740970A (en) * | 2016-12-14 | 2017-05-31 | 中车株洲电力机车有限公司 | Track train brake fluid system and its auxiliary relief device |
| CN207060025U (en) * | 2017-06-16 | 2018-03-02 | 中车长春轨道客车股份有限公司 | Rail vehicle rescues brake hard synchronization control circuit |
| CN109878488A (en) * | 2019-03-22 | 2019-06-14 | 嘉兴市钧萍轨道交通科技有限公司 | A kind of brake fluid system of subway train |
| CN211001349U (en) * | 2019-10-28 | 2020-07-14 | 中车南京浦镇车辆有限公司 | Rail transit vehicle magnetic track brake logic control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114734969B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2688643C2 (en) | Electric parking brake for vehicle | |
| EP2165902B1 (en) | Rail vehicle electro-pneumatic brake system and a rail vehicle equipped with such system | |
| CN203126827U (en) | Emergency brake safety interlock circuit of rail transit vehicle | |
| CN212709358U (en) | Brake-by-wire system with self-checking redundancy function | |
| CN109353369B (en) | Rail vehicle rescue braking system and control method | |
| EA012540B1 (en) | Method for releasing at least one spring-loaded brake actuated by means of a hydraulic fluid, and also a device and a hydraulic circuit for carrying out said method | |
| JP6276430B2 (en) | Operation method of vehicle braking system, braking system, and vehicle equipped with the braking system | |
| CN211995537U (en) | Electric control brake power assisting system with redundant modules | |
| CN112874493B (en) | Tramcar hydraulic braking control method and system | |
| CN1007335B (en) | Tractor air pressure braking system | |
| CN111252047A (en) | Rail vehicle and brake control system thereof | |
| CN101152864B (en) | Braking system of electric car | |
| CA2409894C (en) | Tracked vehicle | |
| CN113895476B (en) | Parking brake control method for electromechanical brake system of urban rail vehicle | |
| CN213502299U (en) | Novel parking braking auxiliary relieving control system for low-floor light rail vehicle | |
| CN114734969A (en) | Braking state loop of passive braking system | |
| CN214295905U (en) | Integrated brake-by-wire system with self-checking redundancy function | |
| CN109335027B (en) | Parking brake control system and control method for railway vehicle rescue | |
| CN114572174B (en) | Brake control system for railway vehicle | |
| CN113085827A (en) | Braking system and automobile | |
| CN217099940U (en) | Parking braking control system | |
| CN2442904Y (en) | Electro-controlled auxiliary brake for automobile trailer | |
| CN1583481A (en) | Emergent braker of vehicle | |
| CN214734070U (en) | Safety braking redundant oil return device of mine hoist | |
| US4645271A (en) | Parking brake control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |