Distributed braking system

Abstract

The invention discloses a distributed braking system which comprises a pedal device, a power assisting device, a wheel set braking device and an oil can, and the pedal device, the power assisting device and the wheel set braking device are distributed in the system and communicate with one another through pipelines; the pedal device, the power assisting device and the wheel pair braking device communicate through respective corresponding control modules; the oil pot is respectively communicated with the pedal device, the power assisting device and the wheel set braking device through pipelines; the pedal device is used for determining braking force; the control module is used for sending control requests carrying braking force to the control module corresponding to the power assisting device and the control module corresponding to the wheel set braking device through the control module corresponding to the pedal device so as to control the power assisting device and the wheel set braking device to conduct pressure adjustment on the wheel set. The devices are distributed in the system, so that the maintenance of the devices is facilitated, and the maintenance cost of the devices is reduced; and each device is provided with a corresponding control module, so that the response time of the system is reduced.

Description

Technical Field

[0001] The present application relates to the field of brake control systems, and in particular to a distributed brake system. Background Art

[0002] Today's society has a growing demand for travel methods, and is increasingly dependent on vehicles, trains and other means of transportation. Therefore, more attention is paid to the safety of means of transportation. The brake system is a major component of vehicles, trains and other means of transportation. Currently, the brake system is mainly composed of mechanical structural components.

[0003] The existing mechanical brake system adopts mechanical transmission control, which has a long control link, slow response time and high maintenance cost. Therefore, a new brake system is needed. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present application proposes a distributed braking system.

[0005] According to one aspect of the present application, a distributed braking system is disclosed, the system comprising: a pedal device, a power-assist device, a wheelset brake device and an oil pot, the pedal device, the power-assist device and the wheelset brake device are distributed in the system and are connected through pipelines; the pedal device, the power-assist device and the wheelset brake device are provided with respective corresponding control modules, the pedal device, the power-assist device and the wheelset brake device communicate through their respective corresponding control modules; the oil pot is respectively connected with the pedal device, the power-assist device and the wheelset brake device through pipelines;

[0006] The pedal device is used to determine the braking force; and is used to send a control request carrying the braking force to a control module corresponding to the power assist device and a control module corresponding to the wheelset brake device through a control module corresponding to the pedal device, respectively, so as to control the power assist device and the wheelset brake device to adjust the pressure of the wheelset based on the braking force;

[0007] The oiler is used to provide oil to the system.

[0008] In some possible implementations, the pedal device includes: a pedal, a pedal control module, a pedal travel sensor, a pedal simulation module, and a brake module, wherein the pedal control module is connected to the control module of the power assist device and the control module of the wheelset brake device through a bus; the pedal simulation module is connected to the brake module through a pipeline;

[0009] The brake module is connected to the wheelset brake device and the oil tank through a pipeline, and the brake module is connected to the pedal through a connecting rod; the pedal travel sensor is used to send the position information of the pedal;

[0010] The pedal control module is used to determine the braking force based on the position information of the pedal; and to control the pedal simulation module to provide pedal force feedback; and to control the power assist device and the wheelset brake device to adjust the pressure of the wheelset based on the braking force.

[0011] In some possible implementations, the brake module includes: a master cylinder, a secondary cylinder, a master cylinder pressure sensor and a secondary cylinder pressure sensor, wherein the master cylinder pressure sensor is disposed on a pipeline connecting the master cylinder and the pedal simulation module, and the secondary cylinder pressure sensor is disposed on a pipeline connecting the secondary cylinder and the wheelset brake device;

[0012] The master cylinder pressure sensor is used to monitor the pressure of the master cylinder and feed back the pressure information of the master cylinder to the pedal control module;

[0013] The secondary cylinder pressure sensor is used to monitor the pressure of the secondary cylinder and feed back the pressure information of the secondary cylinder to the pedal control module;

[0014] The pedal control module is used to determine the braking force based on the pressure information of the master cylinder and the pressure information of the secondary cylinder.

[0015] In some possible implementations, the pedal simulation module includes a pedal simulation valve and a pedal simulator, one end of the pedal simulation valve is connected to the brake module, and the other end is connected to the pedal simulator;

[0016] The pedal simulator is used to provide pedal force feedback when the pedal control module controls the pedal simulation valve to open.

[0017] In some possible embodiments, the pedal device further includes a test valve, one end of which is connected to the oil tank via a pipeline, and the other end of which is connected to the brake module; the test valve is used to detect whether there is leakage in the pipeline between the brake module and the system.

[0018] In some possible implementations, the power-assisting device includes: a power-assisting control module, a mechanical component, and a power-assisting module, wherein the power-assisting control module is respectively connected to the pedal control module of the pedal device and the control module of the wheelset brake device through a bus, and the power-assisting module is connected to the wheelset brake device through a pipeline;

[0019] The power assist control module is used to control the power assist module to adjust the pressure of the wheelset brake device based on the control request of the pedal device;

[0020] The mechanical assembly is used to maintain the pressure in the boost cylinder within a preset pressure threshold range.

[0021] In some possible embodiments, the mechanical component includes: a locking mechanism, a force amplifying mechanism and a fixing mechanism, wherein the locking mechanism is used to maintain the pressure in the power-boosting cylinder within a preset pressure threshold range; the force amplifying mechanism is used to adjust the torque of the motor to provide power to the power-boosting cylinder.

[0022] In some possible implementations, the boost module includes: a motor, a boost cylinder, a boost cylinder pressure sensor, and a motor position sensor, wherein the motor is connected to the boost cylinder; the motor position sensor is disposed at the rotor tail of the motor and is non-contactly connected to the rotor tail of the motor; the boost cylinder pressure sensor is disposed in the boost cylinder;

[0023] The motor is used to provide power to the boost cylinder under the control of the boost control module;

[0024] The motor position sensor is used to monitor the position and speed of the rotor of the motor;

[0025] The booster cylinder is used to adjust the pressure of the wheelset brake device under the control of the booster control module;

[0026] The booster cylinder pressure sensor is used to monitor the pressure of the booster cylinder.

[0027] In some possible implementations, the wheelset brake device includes a wheelset control module and a valve module, the wheelset control module is connected to the pedal control module of the pedal device and the boost control module of the boost device through a bus, and the valve module is connected to the pedal device, the boost device and the oil pot through a pipeline;

[0028] The wheelset control module is used to adjust the pressure of the wheelset by controlling the opening and closing of the valve module based on a control request of the pedal device.

[0029] In some possible implementations, the valve module includes an isolation valve, a liquid inlet valve and a liquid discharge valve; one end of the isolation valve is connected to the brake module of the pedal device through a pipeline, and the other end is connected to the wheelset through a pipeline; one end of the liquid inlet valve is connected to the power-assisting module of the power-assisting device through a pipeline, and the other end is connected to the wheelset through a pipeline; one end of the liquid discharge valve is connected to the oil pot through a pipeline, and the other end is connected to the wheelset through a pipeline;

[0030] The isolation valve is used to prevent mechanical braking under the control of the wheelset control module;

[0031] The liquid inlet valve and the liquid discharge valve are used to open or close under the control of the wheelset control module to adjust the pressure of the wheelset.

[0032] Due to the above technical solution, this application has the following beneficial effects:

[0033] The present application distributes the pedal device, the power-assisting device and the wheelset braking device in the system. When one of the devices has a problem, only the device can be replaced and repaired, which facilitates maintenance and reduces maintenance costs. The pedal device, the power-assisting device and the wheelset braking device have their own corresponding control modules, and the control module corresponding to the pedal device sends control requests to the control module corresponding to the power-assisting device and the control module corresponding to the wheelset braking device respectively, controls the power-assisting device and the wheelset braking device to complete the pressure adjustment of the wheelset, thereby reducing the response time of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 is a structural schematic diagram of a distributed braking system provided in an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of the structure of a pedal device provided in an embodiment of the present application;

[0037] Figure 3 is a schematic structural diagram of a power assist device provided in an embodiment of the present application;

[0038] Figure 4 It is a schematic diagram of the structure of the wheelset braking device provided in an embodiment of the present application.

[0039] Among them, the reference numerals in the figure correspond to: 1-pedal; 2-oil pot; 100-pedal device; 101-pedal control module; 102-pedal travel sensor; 103-test valve; 104-pedal simulator; 105-pedal simulation valve; 106-master cylinder pressure sensor; 107-secondary cylinder pressure sensor; 200-power assist device; 201-power assist control module; 202-motor; 203-motor position sensor; 204-power assist cylinder; 300-wheel pair braking device; 301-wheel pair control module; 302-isolating valve; 303-liquid inlet valve; 304-liquid discharge valve; 305-wheel pair; 3021-first isolating valve; 3022-second isolating valve; 3023-third isolating valve; 3024-fourth isolating valve. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0043] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0044] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0045] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0046] Figure 1 is a structural diagram of a distributed braking system provided in an embodiment of the present application; Figure 1 As shown, the system includes: a pedal device 100, a power-assisting device 200, a wheelset brake device 300 and an oil pot 2, wherein the pedal device 100, the power-assisting device 200 and the wheelset brake device 300 are distributed in the system and are connected through pipelines; the pedal device 100, the power-assisting device 200 and the wheelset brake device 300 are provided with respective corresponding control modules, and the pedal device 100, the power-assisting device 200 and the wheelset brake device 300 communicate through their respective corresponding control modules; the oil pot 2 is respectively connected with the pedal device 100, the power-assisting device 200 and the wheelset brake device 300 through pipelines;

[0047] The pedal device 100 is used to determine the braking force; and is used to send a control request carrying the braking force to a control module corresponding to the power assist device 200 and a control module corresponding to the wheelset brake device 300 through a control module corresponding to the pedal device 100, respectively, so as to control the power assist device 200 and the wheelset brake device 300 to adjust the pressure of the wheelset 305 based on the braking force;

[0048] The oil tank 2 is used to provide oil to the system.

[0049] In the embodiment of the present application, the pedal device, the power-assist device and the wheel-pair brake device are independently distributed in the system, and there is no mechanical connection between the devices, for example, the devices are not directly connected together by electric welding or bolts and nuts, but the devices are connected by pipelines; the pedal device, the power-assist device and the wheel-pair brake device are provided with corresponding control modules, and the control modules of the devices are connected by buses for communication; the pedal device and the power-assist device are powered by an external power supply, and the power supply control of the wheel-pair brake device is provided by the pedal device. Therefore, each device is independent of each other, can independently control the pressure on each wheel pair, and is convenient for device maintenance, reducing maintenance costs; and the system control link is short, reducing the response time of the system.

[0050] In the embodiment of the present application, the oil tank is connected to the pedal device, the power assist device and the wheelset brake device through pipelines, and the oil tank provides the required oil during the braking process of the system.

[0051] Exemplarily, the pipeline may be an oil pipe for connecting various devices of the braking system.

[0052] In an embodiment of the present application, the braking force is determined by a pedal device, and a control request is sent by a control module corresponding to the pedal device to a control module corresponding to the power assist device and a control module corresponding to the wheelset braking device, respectively. The control request carries the braking force required by the system, and the control module corresponding to the power assist device and the control module corresponding to the wheelset braking device operate based on the control request control device components, thereby being able to adjust the pressure on the wheelset and enabling the system to provide corresponding braking force.

[0053] For example, under normal circumstances, the control module of the pedal device receives the pedal change of the vehicle or the automatic driving braking request to determine the braking force, and controls the power-assist device and the wheelset brake device to adjust the wheelset pressure for braking. When a wheelset slips, the control module of the pedal device receives a speed change signal, controls the power-assist device and the wheelset brake device to maintain or reduce the pressure of the wheelset to prevent slipping. When the vehicle shifts sideways, the control module of the pedal device receives an external side shift signal, controls the power-assist device and the wheelset brake device to increase or reduce the pressure of the wheelset to prevent side shifting.

[0054] In an alternative embodiment, Figure 2 is a schematic diagram of the structure of the pedal device provided in the embodiment of the present application, such as Figure 2As shown, the pedal device 100 includes: a pedal 1, a pedal control module 101, a pedal travel sensor 102, a pedal simulation module, and a brake module. The pedal control module 101 is connected to the control module of the power assist device 200 and the control module of the wheelset brake device 300 through a bus CAN-FD; the pedal simulation module is connected to the brake module through a pipeline;

[0055] The brake module is connected to the wheel set brake device 300 and the oil tank 2 through a pipeline, and the brake module is connected to the pedal 1 through a connecting rod; the pedal travel sensor 102 is arranged above the connecting rod and is non-contact connected to the connecting rod;

[0056] The pedal travel sensor 102 is used to send the position information of the pedal 1;

[0057] The pedal control module 101 is used to determine the braking force based on the position information of the pedal 1; and to control the pedal simulation module to provide pedal force feedback; and to control the power assist device 200 and the wheelset brake device 300 to adjust the pressure of the wheelset 305 based on the braking force.

[0058] In an embodiment of the present application, when the driver steps on the pedal, the pedal travel sensor monitors the position of the pedal, and the pedal travel sensor sends the position information of the pedal to the pedal control module. The pedal control module determines the change in the pedal position based on the position information of the pedal, thereby calculating and determining the required braking force. The power assist device and the wheelset brake device are then controlled through the bus CAN-FD (CAN with Flexible Data rate) network to adjust the pressure of the wheelset. The bus CAN-FD in the figure includes CAN-FD1 and CAN-FD2, in order to avoid the system being unable to continue to complete the work when there is a problem with one of the buses, thereby affecting the safety of the driver.

[0059] In the embodiment of the present application, the pedal device can also adjust the pressure of the wheelset through the brake module.

[0060] In an embodiment of the present application, the pedal control module provides pedal force feedback by controlling the pedal simulation module, so that the driver can make appropriate responses according to the pedal force feedback to ensure driving safety.

[0061] In an optional embodiment, the brake module includes: a master cylinder, a secondary cylinder, a master cylinder pressure sensor 106 and a secondary cylinder pressure sensor 107, the master cylinder pressure sensor 106 is arranged on a pipeline connecting the master cylinder and the pedal simulation module, and the secondary cylinder pressure sensor 107 is arranged on a pipeline connecting the secondary cylinder and the wheelset brake device;

[0062] The master cylinder pressure sensor 106 is used to monitor the pressure of the master cylinder and feed back the pressure information of the master cylinder to the pedal control module 101;

[0063] The secondary cylinder pressure sensor 107 is used to monitor the pressure of the secondary cylinder and feed back the pressure information of the secondary cylinder to the pedal control module 101;

[0064] The pedal control module 101 is used to determine the braking force based on the pressure information of the master cylinder and the pressure information of the secondary cylinder.

[0065] In the embodiment of the present application, the pressure information of the master cylinder is fed back to the pedal control module through the master cylinder pressure sensor, and the pressure information of the secondary cylinder is fed back to the pedal control module through the secondary cylinder pressure sensor. The pedal control module receives the pressure information of the master cylinder and the pressure information of the secondary cylinder, and calculates and determines the required braking force. The master cylinder pressure sensor and the secondary cylinder pressure sensor can be used as backups for the pedal travel sensor to determine the braking force. When the pedal control module cannot determine the braking force based on the pedal travel sensor, the braking force can be determined by feedback of the pressure information of the master cylinder pressure sensor and the secondary cylinder pressure sensor.

[0066] In an optional embodiment, the pedal simulation module includes a pedal simulation valve 105 and a pedal simulator 104, one end of the pedal simulation valve 105 is connected to the brake module, and the other end is connected to the pedal simulator 104;

[0067] The pedal simulator 104 is used to provide pedal force feedback when the pedal control module 101 controls the pedal simulation valve 105 to open.

[0068] In an embodiment of the present application, when the driver steps on the pedal, the pedal control module controls the pedal simulation valve to open, one end of the pedal simulation valve is connected to the master cylinder of the brake module, and then the hydraulic part of the master cylinder of the brake module enters the pedal simulator through the pedal simulation valve, and the spring of the pedal simulator provides pedal force feedback, so that the driver can make appropriate responses according to the pedal force feedback to ensure driving safety.

[0069] In an optional embodiment, the pedal device 100 also includes a test valve 103, one end of which is connected to the oil tank 2 through a pipeline, and the other end is connected to the brake module; the test valve 103 is used to detect whether there is leakage between the brake module and the pipeline in the system.

[0070] In an embodiment of the present application, when the system is powered on for self-test, the pedal control module controls the isolation valve of the wheelset brake device to close the valve module, controls the power assist device to increase the pressure, and closes the test valve. At this time, the change in the pedal position determined based on the pedal travel sensor will decrease, and the pressure of the master cylinder pressure sensor and the secondary cylinder pressure sensor of the brake module will increase. If the test results do not show the above phenomenon, it is determined that the brake module and the pipelines in the system are leaking, and the cause of the leakage may be due to gaps in the installation process or damage to components or pipelines.

[0071] In an alternative embodiment, Figure 3 is a schematic diagram of the structure of the power assist device provided in the embodiment of the present application, such as Figure 3 As shown, the power assist device 200 includes: a power assist control module 201, a mechanical component, and a power assist module. The power assist control module 201 is connected to the pedal control module 101 of the pedal device 100 and the control module of the wheelset brake device 300 through the bus CAN-FD, and the power assist module is connected to the wheelset brake device through a pipeline;

[0072] The power assist control module 201 is used to control the power assist module to adjust the pressure of the wheelset brake device 300 based on the control request of the pedal device 100;

[0073] The mechanical assembly is used to maintain the pressure in the boost cylinder 204 within a preset pressure threshold range.

[0074] In the embodiment of the present application, the power assist control module controls the communication with the pedal control module of the pedal device and the wheel pair brake device through the CAN-FD network. Based on the control request sent by the pedal control module of the pedal device, the power assist control module controls the power assist module to provide the power assist pressure required by the system, maintains the pressure required by the system through the mechanical components, and adjusts the pressure of the wheel pair brake device.

[0075] In an optional embodiment, the mechanical assembly includes: a locking mechanism, a force amplifying mechanism and a fixing mechanism, wherein the locking mechanism is used to maintain the pressure in the power-boosting cylinder within a preset pressure threshold range; the force amplifying mechanism is used to adjust the torque of the motor to provide power to the power-boosting cylinder.

[0076] In the embodiment of the present application, the force-increasing mechanism provides power to the boost cylinder by amplifying the torque of the motor, and the locking mechanism maintains the pressure in the boost cylinder within the pressure range required by the system to provide the braking force, thereby preventing the pressure in the boost cylinder from dropping when the motor is powered off and cannot operate normally. Exemplarily, the locking mechanism includes but is not limited to a power-off clutch and a self-locking lead screw mechanism. For the self-locking lead screw mechanism, the lead screw is electrically controlled to lose power so that the lead screw remains in a fixed position, thereby maintaining the pressure in the boost cylinder, thereby reducing the force required for the parking process and making it easier for the driver to park.

[0077] In an optional embodiment, the boost module includes: a motor 202, a boost cylinder 204, a boost cylinder pressure sensor, and a motor position sensor 203, wherein the motor 202 is connected to the boost cylinder 204; the motor position sensor 203 is arranged at the tail of the rotor of the motor 202, and is non-contactly connected to the tail of the rotor of the motor 202; the boost cylinder pressure sensor is arranged in the boost cylinder 204;

[0078] The motor 202 is used to provide power to the boost cylinder 204 under the control of the boost control module 201;

[0079] The motor position sensor 203 is used to monitor the position and speed of the rotor of the motor 202;

[0080] The boost cylinder 204 is used to adjust the pressure of the wheelset brake device 300 under the control of the boost control module 201;

[0081] The booster cylinder pressure sensor is used to monitor the pressure of the booster cylinder 204 .

[0082] In the embodiment of the present application, there is a magnetic device at the tail of the motor rotor, and the motor position sensor is non-contactly connected to the tail of the motor rotor. The power-assist control module determines whether the power-assist device has reached the pressure required by the system to provide braking force by monitoring the motor position sensor and the power-assist cylinder pressure sensor. The power-assist control module controls the motor to provide power to the power-assist cylinder so that the pressure of the power-assist cylinder reaches the power-assist pressure required by the system to provide braking force, thereby adjusting the pressure of the wheelset brake device.

[0083] In an alternative embodiment, Figure 4 is a schematic diagram of the structure of the wheelset brake device provided in the embodiment of the present application, such as Figure 4 As shown, the wheelset brake device 300 includes a wheelset control module 301 and a valve module. The wheelset control module 301 is connected to the pedal control module 101 of the pedal device and the boost control module 201 of the boost device through a bus CAN-FD. The valve module is connected to the pedal device 100, the boost device 200 and the oil pot 2 through a pipeline.

[0084] The wheelset control module 301 is used to adjust the pressure of the wheelset 305 by opening and closing the control valve module based on the control request of the pedal device 100 .

[0085] In the embodiment of the present application, the wheelset control module communicates with the pedal control module of the pedal device and the power-assisting control module of the power-assisting device through the CAN-FD network control. Based on the control request sent by the pedal control module of the pedal device, the wheelset control module adjusts the pressure of the wheelset by opening and closing the control valve module.

[0086] In an embodiment of the present application, the vehicle braking system includes a four-way wheelset braking device, each wheelset braking device includes a wheelset control module and a valve module, and the four wheelset braking devices respectively adjust the pressure of the corresponding wheelsets through their respective wheelset control modules and their respective valve modules, and are independent of each other and do not affect each other, so as to achieve independent control of each wheelset.

[0087] In an optional embodiment, the valve module includes an isolation valve 302, a liquid inlet valve 303 and a liquid discharge valve 304, one end of the isolation valve 302 is connected to the brake module of the pedal device 100 through a pipeline, and the other end is connected to the wheel set 305 through a pipeline; one end of the liquid inlet valve 303 is connected to the power module of the power-assisting device 200 through a pipeline, and the other end is connected to the wheel set 305 through a pipeline; one end of the liquid discharge valve 304 is connected to the oil pot 2 through a pipeline, and the other end is connected to the wheel set 305 through a pipeline;

[0088] The isolation valve 302 is used to prevent mechanical braking under the control of the wheelset control module 301;

[0089] The liquid inlet valve 303 and the liquid outlet valve 304 are used to open or close under the control of the wheelset control module 301 to adjust the pressure of the wheelset 305 .

[0090] In the embodiment of the present application, the four-way wheel pair brake device includes a first isolation valve 3021, a second isolation valve 3022, a third isolation valve 3023 and a fourth isolation valve 3024. One end of the first isolation valve 3021 and one end of the second isolation valve 3022 are connected to the secondary cylinder of the brake module through a pipeline, and one end of the third isolation valve 3023 and one end of the fourth isolation valve 3024 are connected to the master cylinder of the brake module through a pipeline. One end of the inlet valve 303 is connected to the booster cylinder 204 of the booster module through a pipeline.

[0091] In an embodiment of the present application, under normal circumstances, when the pedal control module receives a braking request, it sends a control request to the wheelset control module, the wheelset control module controls the isolation valve to close, controls the liquid inlet valve to open, and controls the liquid discharge valve to close, regulates the pressure of the wheelset, and brakes the wheelset at the pressure required by the regulation output system.

[0092] In the embodiment of the present application, in the mechanical backup mode, that is, at this time, the pedal control module determines that the system electrical control fails, cuts off the power supply to the wheelset brake device, controls the isolation valve to open, maintains the connection state, and controls the drain valve and the inlet valve to close. The oil in the master cylinder and the secondary cylinder of the pedal device flows to the wheelset through the pipeline and the isolation valve, and the wheelset is pressurized to brake.

[0093] In the embodiment of the present application, each device can complete its own detection through its own control module and feed back the detection result to the pedal control module. When an abnormality occurs in the power assist device or an abnormality occurs in more than two wheelset brake devices, the pedal control module controls the switch to mechanical backup, cuts off the power to the wheelset brake device, opens the isolation valve, and allows the oil in the master cylinder and the secondary cylinder of the pedal device to flow to the wheelset through the pipeline and the isolation valve, thereby pressurizing the wheelset for braking. That is, the driver steps on the pedal to directly provide power assistance to the wheelset brake device through the pedal device for braking.

[0094] In an optional embodiment, the embodiment of the present application further includes a distributed braking method, the method comprising:

[0095] The pedal control module of the pedal device determines the braking force based on the pedal position information sent by the pedal travel sensor of the pedal device; or, the pedal control module of the pedal device determines the braking force based on the master cylinder pressure information sent by the master cylinder pressure sensor and the secondary cylinder pressure information sent by the secondary cylinder pressure sensor.

[0096] The pedal control module of the pedal device sends a control request to the power-assisting control module of the power-assisting device and the wheelset control module of the wheelset braking device, and the control request carries braking force information.

[0097] The power-assisting control module controls the motor to provide power to the power-assisting cylinder based on the control request, thereby pushing the power-assisting cylinder to adjust the pressure of the wheelset brake device; the wheelset control module controls the inlet valve of the wheelset brake device and the start or closing of the discharge valve of the wheelset brake device based on the control request, thereby adjusting the pressure of the wheelset.

[0098] In an optional embodiment, the embodiment of the present application also includes another distributed braking method, which can be applied when the pedal control module determines that the system electrical control fails and cuts off the power supply to the wheelset brake device. The method includes:

[0099] The pedal control module of the pedal device controls the isolation valve of the wheel set brake device to open, maintain the connection state, and controls the drain valve and the inlet valve to close. The oil in the master cylinder and the secondary cylinder of the pedal device flows to the wheel set through the pipeline and the isolation valve, and the wheel set is pressurized to brake.

[0100] In an optional embodiment, the embodiment of the present application also includes a vehicle, which includes the distributed braking system described in any of the above embodiments.

[0101] It can be seen from the embodiments provided by the present application that the present application can independently control each wheelset by distributing the pedal device, the power-assisting device and the wheelset braking device in the system, and when one of the devices has a problem, only the device can be replaced and repaired, which facilitates maintenance and reduces maintenance costs; the pedal device, the power-assisting device and the wheelset braking device have their own corresponding control modules, and the control module corresponding to the pedal device sends control requests to the control module corresponding to the power-assisting device and the control module corresponding to the wheelset braking device respectively, controls the power-assisting device and the wheelset braking device to complete the pressure adjustment of the wheelset, thereby reducing the response time of the system.

[0102] It should be noted that the above-mentioned sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0103] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device and server embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0104] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0105] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A distributed braking system, characterized in that: The system comprises: a pedal device, a power-assist device, a wheelset brake device and an oil pot, wherein the pedal device, the power-assist device and the wheelset brake device are distributed in the system and are connected through pipelines; the pedal device, the power-assist device and the wheelset brake device are provided with respective corresponding control modules, and the pedal device, the power-assist device and the wheelset brake device communicate with each other through the respective corresponding control modules; the oil pot is connected with the pedal device, the power-assist device and the wheelset brake device respectively through pipelines; The pedal device is used to determine the braking force; and is used to send a control request carrying the braking force to a control module corresponding to the power assist device and a control module corresponding to the wheelset brake device through a control module corresponding to the pedal device, respectively, so as to control the power assist device and the wheelset brake device to adjust the pressure of the wheelset based on the braking force; The oiler is used to provide oil to the system.

2. The distributed braking system according to claim 1, characterized in that: The pedal device comprises: a pedal, a pedal control module, a pedal travel sensor, a pedal simulation module, and a brake module. The pedal control module is connected to the control module of the power assist device and the control module of the wheelset brake device through a bus; the pedal simulation module is connected to the brake module through a pipeline; The brake module is connected to the wheelset brake device and the oil tank through a pipeline, and the brake module is connected to the pedal through a connecting rod; the pedal travel sensor is used to send the position information of the pedal; The pedal control module is used to determine the braking force based on the position information of the pedal; and to control the pedal simulation module to provide pedal force feedback; and to control the power assist device and the wheelset brake device to adjust the pressure of the wheelset based on the braking force.

3. The distributed braking system according to claim 2, characterized in that: The brake module comprises: a master cylinder, a secondary cylinder, a master cylinder pressure sensor and a secondary cylinder pressure sensor, wherein the master cylinder pressure sensor is arranged on a pipeline connecting the master cylinder and the pedal simulation module, and the secondary cylinder pressure sensor is arranged on a pipeline connecting the secondary cylinder and the wheelset brake device; The master cylinder pressure sensor is used to monitor the pressure of the master cylinder and feed back the pressure information of the master cylinder to the pedal control module; The secondary cylinder pressure sensor is used to monitor the pressure of the secondary cylinder and feed back the pressure information of the secondary cylinder to the pedal control module; The pedal control module is used to determine the braking force based on the pressure information of the master cylinder and the pressure information of the secondary cylinder.

4. The distributed braking system according to claim 2, characterized in that: The pedal simulation module includes a pedal simulation valve and a pedal simulator, one end of the pedal simulation valve is connected to the brake module, and the other end is connected to the pedal simulator; The pedal simulator is used to provide pedal force feedback when the pedal control module controls the pedal simulation valve to open.

5. The distributed braking system according to claim 2, characterized in that: The pedal device also includes a test valve, one end of which is connected to the oil pot through a pipeline, and the other end of which is connected to the brake module; the test valve is used to detect whether there is leakage between the brake module and the pipeline in the system.

6. The distributed braking system according to claim 2, characterized in that: The power-assisting device comprises: a power-assisting control module, a mechanical component, and a power-assisting module. The power-assisting control module is respectively connected to the pedal control module of the pedal device and the control module of the wheelset brake device through a bus, and the power-assisting module is connected to the wheelset brake device through a pipeline. The power assist control module is used to control the power assist module to adjust the pressure of the wheelset brake device based on the control request of the pedal device; The mechanical assembly is used to maintain the pressure in the boost cylinder within a preset pressure threshold range.

7. The distributed braking system according to claim 6, characterized in that: The mechanical assembly includes: a locking mechanism, a force-enhancing mechanism and a fixing mechanism. The locking mechanism is used to maintain the pressure in the power-enhancing cylinder within a preset pressure threshold range; the force-enhancing mechanism is used to adjust the torque of the motor to provide power for the power-enhancing cylinder.

8. The distributed braking system according to claim 6, characterized in that: The booster module includes: a motor, a booster cylinder, a booster cylinder pressure sensor, and a motor position sensor. The motor is connected to the booster cylinder. The motor position sensor is arranged at the tail of the motor rotor and is non-contactly connected to the tail of the motor rotor. The booster cylinder pressure sensor is arranged in the booster cylinder. The motor is used to provide power to the boost cylinder under the control of the boost control module; The motor position sensor is used to monitor the position and speed of the rotor of the motor; The booster cylinder is used to adjust the pressure of the wheelset brake device under the control of the booster control module; The booster cylinder pressure sensor is used to monitor the pressure of the booster cylinder.

9. The distributed braking system according to claim 6, characterized in that: The wheelset brake device comprises a wheelset control module and a valve module, wherein the wheelset control module is connected to the pedal control module of the pedal device and the boost control module of the boost device via a bus, and the valve module is connected to the pedal device, the boost device and the oil pot via a pipeline; The wheelset control module is used to adjust the pressure of the wheelset by controlling the opening and closing of the valve module based on a control request of the pedal device.

10. The distributed braking system according to claim 9, characterized in that: The valve module includes an isolation valve, a liquid inlet valve and a liquid discharge valve, one end of the isolation valve is connected to the brake module of the pedal device through a pipeline, and the other end is connected to the wheelset through a pipeline; one end of the liquid inlet valve is connected to the power-assisting module of the power-assisting device through a pipeline, and the other end is connected to the wheelset through a pipeline; one end of the liquid discharge valve is connected to the oil pot through a pipeline, and the other end is connected to the wheelset through a pipeline; The isolation valve is used to prevent mechanical braking under the control of the wheelset control module; The liquid inlet valve and the liquid discharge valve are used to open or close under the control of the wheelset control module to adjust the pressure of the wheelset.

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