Device and method for collecting brake wear particles

Abstract

The invention relates to the technical field of motor vehicle non-tail-gas particulate matter emission testing, in particular to a brake abrasion particulate matter collecting device and method.The brake abrasion particulate matter collecting device comprises a brake assembly, a collecting assembly and a controller, a collecting groove is formed in the braking end of the brake assembly, a collecting channel is formed in brake calipers, and the collecting channel communicates with the collecting groove; the collecting assembly comprises a fan and a particulate matter collector, one end of the particulate matter collector is connected to the air outlet end of the fan, the other end of the particulate matter collector communicates with the collecting channel through a pipeline, and a heating piece is arranged in the particulate matter collector; and the controller is electrically connected with the fan and the heating piece. When an automobile brakes, particles generated by abrasion of a brake pad enter the particle collector through the collecting groove, the collecting channel and the pipeline under the counterclockwise driving of a brake disc and the influence of gravity, so that the particles are gathered and collected as much as possible, and when the particles in the particle collector are accumulated to a certain degree, the controller controls the heating piece to heat, so that the particles are collected. And the particles are combusted and are prevented from overflowing.

Description

Technical Field

[0001] The present application relates to the technical field of non-exhaust particulate emission testing for motor vehicles, and in particular to a device and method for collecting brake wear particulate matter. Background Art

[0002] Investigations and studies have shown that most of the particulate matter emissions from road traffic come from non-exhaust particulate matter emissions, among which particulate matter emissions generated by brake wear are the main source of emissions.

[0003] In the prior art, the device for collecting particulate matter has low collection efficiency, and the particulate matter in the collection device needs to be cleaned manually, which is inconvenient to use, and there is a possibility that the particulate matter will be dumped into the atmosphere, which is contrary to the original design intention of the device.

[0004] Therefore, there is an urgent need for a device and method for collecting brake wear particles to improve the absorption efficiency of particles, eliminate the possibility of secondary emission of particles, and effectively reduce the emission of wear particles. Summary of the invention

[0005] The purpose of this application is to provide a device and method for collecting brake wear particles in order to solve the above problems.

[0006] In a first aspect, the present application provides a device for collecting brake wear particles, comprising: A brake assembly, the brake assembly comprising a brake disc, a brake caliper and a brake pad, the brake caliper can selectively abut against or separate from the brake disc, the brake pad is arranged on a surface of the brake caliper on a side abutting against the brake disc, a collection groove is arranged at one end of the brake pad located downstream in the rotation direction of the brake disc, a collection channel is arranged in the brake caliper, and the collection channel is communicated with the collection groove; A collecting component, the collecting component comprises a fan and a particle collector, one end of the particle collector is connected to the air outlet end of the fan, and the other end is connected to the collecting channel through a pipeline, and the particle collector has a built-in heating element; a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is used to receive a pressure signal of a brake pedal, and the second pressure sensor is used to receive a pressure signal inside the pipeline; A controller is electrically connected to the fan, the heater, the first pressure sensor and the second pressure sensor.

[0007] According to the technical solution provided in the embodiment of the present application, the collecting channel is a U-shaped structure.

[0008] According to the technical solution provided in the embodiment of the present application, the side wall of the particle collector is honeycomb-shaped.

[0009] According to the technical solution provided in the embodiment of the present application, the particle collector is equipped with an adsorbent.

[0010] According to the technical solution provided in the embodiment of the present application, the controller includes a first controller and a second controller, the first controller is electrically connected to the fan, the first pressure sensor and the second pressure sensor, and is used to control the opening and closing of the fan; the second controller is electrically connected to the heating element and the second pressure sensor, and is used to control the opening and closing of the heating element.

[0011] According to the technical solution provided in the embodiment of the present application, the heating element is arranged at one end of the particle collector connected to the pipeline.

[0012] In a second aspect, the present application provides a method for collecting brake wear particles, the method comprising: When the pressure on the first pressure sensor reaches a first preset pressure, the controller controls the fan to start, and the particle collector collects brake wear particles; The pressure applied to the first pressure sensor is less than a first preset pressure, and the pressure applied to the second pressure sensor reaches a second preset pressure. The controller controls the heater and the fan to turn on to oxidize and regenerate brake wear particles in the particle collector.

[0013] According to the technical solution provided in the embodiment of the present application, the pressure applied to the first pressure sensor is less than the first preset pressure, the pressure applied to the second pressure sensor is less than the third preset pressure, the controller controls the heating element and the fan to be turned off, and the third preset pressure is less than the second preset pressure.

[0014] Compared with the prior art, the present application has the following beneficial effects: the brake wear particle collection device of the present application comprises: a brake assembly, the brake assembly comprises a brake disc, a brake caliper and a brake pad, the brake caliper can selectively abut or separate from the brake disc, the brake pad is arranged on the surface of the brake caliper and the brake disc abutting side, the brake pad is provided with a collection groove at one end of the brake pad located downstream in the rotation direction of the brake disc, a collection channel is provided in the brake caliper, and the collection channel is communicated with the collection groove; a collection assembly, the collection assembly comprises a fan and a particle collector, one end of the particle collector is connected to the air outlet end of the fan, and the other end is communicated with the collection channel through a pipeline, and the particle collector has a built-in heating element; a first pressure sensor and a second pressure sensor, the first pressure sensor is used to receive a pressure signal of a car pedal, and the second pressure sensor is used to receive a pressure signal inside the pipeline; a controller, the controller is electrically connected to the fan, the heating element, the first pressure sensor and the second pressure sensor.

[0015] When the car brakes, the brake caliper tightens, and the brake is applied by friction between the brake pad and the brake disc. The brake wear particles generated during the friction process will cause air pollution. Since the brake disc material used in the car is relatively hard and the brake pad is relatively hard, the particles generated during the braking process are basically caused by the wear of the brake pad. When the car brakes, the brake disc rotates counterclockwise, and the positions of the brake caliper and brake pad are fixed. The particles generated by the wear of the brake pad are driven counterclockwise by the brake disc, the influence of gravity, and the negative pressure of the fan. The particles fall into the collection channel through the collection slot, and then enter the particle collector through the pipeline, so that as many particles as possible are gathered and collected, reducing the escape of particles, which is beneficial to environmental protection.

[0016] When the particulate matter in the particulate matter collector accumulates to a certain level, the controller controls the heating element in the particulate matter collector to heat up, so that the particulate matter therein burns, thereby oxidizing and regenerating, preventing the particulate matter from overflowing, and improving the safety of motor vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a device for collecting brake wear particles provided in an embodiment of the present application; Figure 2 A schematic diagram of the first angle structure of the brake assembly provided in an embodiment of the present application; Figure 3 A schematic diagram of the second angle structure of the brake assembly provided in an embodiment of the present application; Figure 4 A cross-sectional view of a brake assembly provided in an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the collection component provided in the embodiment of the present application.

[0018] The reference numerals in the figures represent: 100. Brake pedal; 1. brake assembly; 11. brake caliper; 111. collection channel; 12. brake pad; 121. collection tank; 2. Particle collector; 21. Pipe; 22. Heating element; 3. Fan; 4. First pressure sensor; 5. Second pressure sensor; 6. First controller; 7. Second controller; 8. First circuit; 9. Second circuit. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0021] Investigations and studies have shown that most of the particulate matter emissions from road traffic come from non-exhaust particulate matter emissions, among which particulate matter emissions generated by brake wear are the main source of emissions.

[0022] In the prior art, the device for collecting particulate matter has low collection efficiency, and the particulate matter in the collection device needs to be cleaned manually, which is inconvenient to use, and there is a possibility that the particulate matter will be dumped into the atmosphere, which is contrary to the original design intention of the device.

[0023] Therefore, there is an urgent need for a device and method for collecting brake wear particles to improve the absorption efficiency of particles, eliminate the possibility of secondary emission of particles, and effectively reduce the emission of wear particles.

[0024] like Figure 1-5As shown, the collection device of brake wear particles of the present application comprises a brake assembly 1, a collection assembly, a first pressure sensor 4 and a controller. The brake assembly 1 comprises a brake disc, a brake caliper 11 and a brake pad 12, wherein the brake caliper 11 can selectively abut or separate from the brake disc, the brake pad 12 is arranged on the surface of the brake caliper 11 on the side abutting the brake disc, the brake pad 12 is provided with a collection groove 121 at one end of the brake pad 12 located downstream of the rotation direction of the brake disc, the brake caliper 11 is provided with a collection channel 111, the collection channel 111 is connected with the collection groove 121, and the collection channel 111 is a U-shaped structure. The collection assembly comprises a fan 3 and a particle collector 2, one end of the particle collector 2 is connected to the air outlet end of the fan 3, and the other end is connected with the collection channel 111 through a pipe 21, the first pressure sensor 4 is used to receive the pressure signal of the brake pedal 100, and the controller is electrically connected to the fan 3 and the first pressure sensor 4.

[0025] When the car brakes, the brake caliper 11 tightens, and the brake pad 12 is rubbed against the brake disc to brake. The brake wear particles generated during the friction process will cause air pollution. Since the hardness of the brake disc material used in the car is relatively high and the hardness of the brake pad 12 is relatively low, the particles generated during the braking process are basically caused by the wear of the brake pad 12. When the car brakes, the brake disc rotates counterclockwise, and the positions of the brake caliper 11 and the brake pad 12 are fixed. The particles generated by the wear of the brake pad 12 are driven counterclockwise by the brake disc, the influence of gravity, and the negative pressure of the fan 3. The particles fall into the collection channel 111 through the collection groove 121, and then enter the particle collector 2 through the pipe 21, so that as many particles as possible are gathered and collected, reducing the escape of particles, which is beneficial to environmental protection.

[0026] Specifically, the particle collector 2 provided in this example is installed with an adsorbent, so that the particles entering the particle collector 2 through the pipeline are adsorbed into the adsorbent, which ensures the absorption efficiency, further reduces the escape of particles, prevents the impact of the escape of particles on the operation of motor vehicles, and avoids the pollution of the air by particles. The side wall of the particle collector 2 provided in this embodiment adopts a honeycomb structure, specifically a wall-flow honeycomb ceramic structure, which can fully increase the contact area between the adsorbent and the particles and increase the particle absorption capacity of the particle collector 2. When the fan starts working, the mixed air with particles enters the particle collector through the pipeline, forming a vortex airflow, and the airflow is fully in contact with the honeycomb ceramic structure, and the particles are adsorbed on it.

[0027] The adsorbent provided in this embodiment is a filter cotton, and the filter cotton adsorbed with particles can be removed and replaced with a new one. The components, element composition and content of the adsorbed particles can be analyzed and tested to monitor the components of brake wear particles.

[0028] The brake wear particle collection device provided in this embodiment also includes a heating element 22 and a second pressure sensor 5 built into the particle collector 2, wherein the heating element 22 is arranged at one end of the particle collector 2 connected to the pipe 21; the second pressure sensor 5 is used to receive the pressure signal inside the pipe 21, and the controller is electrically connected to the heating element 22 and the second pressure sensor 5.

[0029] When the particulate matter in the particulate matter collector accumulates to a certain level, the controller controls the heating element 22 in the particulate matter collector 2 to heat up, thereby increasing the intake air temperature of the particulate matter collector 2 so that the particulate matter therein burns, thereby oxidizing and regenerating, preventing the particulate matter from overflowing and improving the safety of motor vehicle driving.

[0030] The controller provided in this embodiment includes a first controller 6 and a second controller 7. The first controller 6 is electrically connected to the fan 3, the first pressure sensor 4 and the second pressure sensor 5, and is used to control the opening and closing of the fan 3; the second controller 7 is electrically connected to the heating element 22 and the second pressure sensor 5, and is used to control the opening and closing of the heating element 22.

[0031] This embodiment only describes a single brake assembly 1 , and the number of pipes 21 may be increased or the number of particle collectors 2 and pipes 21 may be increased to collect the particles generated by four brake assemblies 1 .

[0032] This embodiment further provides a method for collecting brake wear particles, the method using the brake wear particle collection device as described above, the method comprising: The pressure on the first pressure sensor 4 is greater than the first preset pressure, the controller controls the fan 3 to turn on, and the particle collector 2 collects brake wear particles; The pressure applied to the first pressure sensor 4 is less than the first preset pressure, and the pressure applied to the second pressure sensor 5 is greater than the second preset pressure. The controller controls the heating element 22 and the fan 3 to turn on so as to oxidize and regenerate the brake wear particles in the particle collector 2.

[0033] Specifically, after the driver steps on the brake pedal 100, the first pressure sensor 4 senses the pressure signal and converts the pressure signal into an electrical signal, and transmits the signal to the first controller 6 through the first line 8. After receiving the signal, the first controller 6 judges the pressure value. When the pressure value reaches the first preset pressure set inside it, it controls the fan 3 to turn on through the second line 9, so that the particulate matter is absorbed into the particulate matter collector 2 through the pipe 21; when the driver releases the brake pedal 100, the pressure on the brake pedal 100 decreases, and the first pressure sensor 4 transmits the pressure signal to the first controller 6. When the pressure value is lower than the first preset pressure set inside it, it controls the fan to turn off through the second line 9.

[0034] The second pressure sensor 5 can convert the pressure signal of the particle collector 2 into an electrical signal, and transmit these signals to the first controller 6 and the second controller 7. When a certain amount of particulate matter accumulates in the particle collector 2, the second pressure sensor 5 senses the increase in the back pressure of the particle collector 2 and the pipeline 21 caused by the accumulation of particulate matter, and transmits the back pressure value to the second controller 7. After receiving the signal, the second controller 7 determines the back pressure value. When the back pressure value reaches the second preset pressure, in the non-braking stage, that is, when the pressure on the first pressure sensor 4 is less than the first preset pressure, the second controller 7 controls the heater 22 to turn on, and the first controller 6 controls the fan 3 to turn on. The airflow in the pipeline 21 is heated by the heater 22, and the temperature rises. By increasing the intake temperature of the particle collector 2, the particulate matter therein is burned, thereby oxidizing and regenerating to achieve environmental protection; when the back pressure sensed by the second pressure sensor 5 is lower than the third preset pressure, the second controller 7 controls the heater 22 to turn off, and the first controller 6 controls the fan 3 to turn off. Among them, the third preset pressure is lower than the second preset pressure.

[0035] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A device for collecting brake wear particles, characterized in that: include: A brake assembly (1), the brake assembly (1) comprising a brake disc, a brake caliper (11) and a brake pad (12), the brake caliper (11) being capable of selectively abutting against or separating from the brake disc, the brake pad (12) being arranged on a surface of a side of the brake caliper (11) abutting against the brake disc, a collecting groove (121) being arranged at one end of the brake pad (12) located downstream in a rotation direction of the brake disc, a collecting channel (111) being arranged in the brake caliper (11), the collecting channel (111) being in communication with the collecting groove (121); A collecting component, the collecting component comprising a particle collector (2) and a fan (3), one end of the particle collector (2) being connected to an air outlet end of the fan (3), and the other end being in communication with the collecting channel (111) via a pipe (21), and the particle collector (2) having a built-in heating element (22); a first pressure sensor (4) and a second pressure sensor (5), wherein the first pressure sensor (4) is used to receive a pressure signal from a brake pedal (100), and the second pressure sensor (5) is used to receive a pressure signal inside the pipe (21); A controller, wherein the controller is electrically connected to the fan (3), the heating element (22), the first pressure sensor (4) and the second pressure sensor (5).

2. The device for collecting brake wear particles according to claim 1, characterized in that: The collecting channel (111) is a U-shaped structure.

3. The device for collecting brake wear particles according to claim 1, characterized in that: The side wall of the particle collector (2) is honeycomb-shaped.

4. The device for collecting brake wear particles according to claim 3, characterized in that: The particle collector (2) has an adsorbent built into it.

5. The device for collecting brake wear particles according to claim 1, characterized in that: The controller comprises a first controller (6) and a second controller (7); the first controller (6) is electrically connected to the fan (3), the first pressure sensor (4) and the second pressure sensor (5) for controlling the on / off of the fan (3); and the second controller (7) is electrically connected to the heating element (22) and the second pressure sensor (5) for controlling the on / off of the heating element (22).

6. The device for collecting brake wear particles according to claim 1, characterized in that: The heating element (22) is arranged at one end of the particle collector (2) that is in communication with the pipeline (21).

7. A method for collecting brake wear particles, characterized in that: The method adopts the brake wear particle collection device according to any one of claims 1 to 6, and the method comprises: When the pressure on the first pressure sensor (4) reaches a first preset pressure, the controller controls the fan (3) to start, and the particle collector (2) collects brake wear particles; The pressure applied to the first pressure sensor (4) is less than a first preset pressure, and the pressure applied to the second pressure sensor (5) reaches a second preset pressure, and the controller controls the heating element (22) and the fan (3) to turn on, so as to oxidize and regenerate brake wear particles in the particle collector (2).

8. The method for collecting brake wear particles according to claim 7, characterized in that: The pressure applied to the first pressure sensor (4) is less than a first preset pressure, the pressure applied to the second pressure sensor (5) is less than a third preset pressure, the controller controls the heating element (22) and the fan (3) to be turned off, and the third preset pressure is less than the second preset pressure.

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