Solenoid valve noise testing method, device, system, hydraulic brake system and vehicle

Abstract

The embodiment of the present invention proposes a solenoid valve noise test method, device, system, hydraulic brake system and vehicle, which relate to the field of vehicle braking technology. The method is applied to a controller in a hydraulic brake system, and the controller is in communication connection with the solenoid valve group and the motor of the pressure-building cylinder in the hydraulic brake system; after receiving the solenoid valve noise test request, the controller controls the motor to work so that the pressure-building cylinder starts to build pressure; the solenoid valve group is controlled to be in different working conditions, and the noise data of the solenoid valve group under different working conditions is collected through a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal. The method detects the noise of the solenoid valve group under different working conditions, and the detection process is more in line with the actual working scene. It only requires one pressure build-up and does not require pedal coordination. Compared with the prior art method of individually detecting each valve, the detection efficiency is effectively improved and the detection error rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, and in particular to a solenoid valve noise testing method, device, system, hydraulic braking system and vehicle. Background Art

[0002] With the continuous development of automobile technology, hydraulic brake system has been widely used as an advanced braking technology. The hydraulic brake system generates brake pressure by compressing brake fluid through motor, and realizes the circuit control of hydraulic pressure through the control of solenoid valve.

[0003] Since the high-frequency control of the solenoid valve has high requirements on the performance and noise of the solenoid valve, strict requirements are placed on the design and manufacture of the solenoid valve. In practical applications, when the solenoid valve processing accuracy is insufficient or the software control logic is abnormal, the solenoid valve control will produce a large noise, affecting the user experience. In order to prevent such problems from flowing into the hands of end users, the solenoid valve needs to be tested for NVH (noise, vibration and roughness) on the production line.

[0004] However, the existing solenoid valve noise testing method usually tests a single valve in the hydraulic brake system, which requires multiple pressure build-ups and pedal coordination, resulting in low detection efficiency and high detection error rate. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a solenoid valve noise testing method, device, system, hydraulic brake system and vehicle to solve the problems in the prior art that multiple pressure build-up and pedal coordination are required, resulting in low detection efficiency and high detection error rate.

[0006] In order to achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0007] In a first aspect, the present invention provides a solenoid valve noise testing method, which is applied to a controller in a hydraulic brake system, wherein the controller is communicatively connected with a solenoid valve group and a motor of a pressure-building cylinder in the hydraulic brake system; the method comprises:

[0008] After receiving the solenoid valve noise test request, controlling the motor to work so that the pressure building cylinder starts to build pressure;

[0009] The solenoid valve group is controlled to be in different working conditions, and noise data of the solenoid valve group under different working conditions is collected by a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal.

[0010] In an optional implementation, controlling the solenoid valve group to be in different working conditions includes:

[0011] Each valve in the solenoid valve group is controlled to open or close according to a preset sequence, so that the solenoid valve group is in different working conditions.

[0012] In an optional embodiment, the solenoid valve group includes a TSV valve, an SSV valve, a PSV valve group, a CSV valve group, an IV valve group and an OV valve group; and the control of opening or closing each valve in the solenoid valve group in a preset sequence so that the solenoid valve group is in different working conditions includes:

[0013] Controlling the PSV valve group to open and controlling the CSV valve group to close so that the solenoid valve group is in a first working condition; the noise data corresponding to the first working condition is used to determine whether the PSV valve group and the CSV valve group are abnormal;

[0014] Controlling each IV valve in the IV valve group to close in sequence, so that the solenoid valve group is in a second working condition; the noise data corresponding to the second working condition is used to determine whether each IV valve is abnormal;

[0015] Controlling all IV valves in the IV valve group to open, and sequentially controlling each OV valve in the OV valve group to open, so that the solenoid valve group is in a third working condition; the noise data corresponding to the third working condition is used to determine whether each OV valve is abnormal;

[0016] Controlling all OV valves in the OV valve group to close, and controlling the CSV valve group to open, so that the solenoid valve group is in a fourth working condition; the noise data corresponding to the fourth working condition is used to determine whether the CSV valve group is abnormal;

[0017] Control the second CSV valve in the CSV valve group to close and control the TSV valve to close, so that the solenoid valve group is in the fifth working condition; the noise data corresponding to the fifth working condition is used to determine whether the TSV valve is abnormal; the second CSV valve and the TSV valve are connected to different master cylinders;

[0018] The SSV valve is controlled to open so that the solenoid valve group is in a sixth operating condition; the noise data corresponding to the sixth operating condition is used to determine whether the SSV valve is abnormal.

[0019] In an optional embodiment, the PSV valve group includes a first PSV valve and a second PSV valve, and the CSV valve group includes a first CSV valve and a second CSV valve;

[0020] The controlling the PSV valve group to open and the controlling the CSV valve group to close comprises:

[0021] Controlling the first PSV valve and the second PSV valve to be opened, and controlling the first CSV valve and the second CSV valve to be closed;

[0022] The controlling the CSV valve group to open comprises:

[0023] Control the first CSV valve and the second CSV valve to open.

[0024] In an optional embodiment, the IV valve group includes a first IV valve, a second IV valve, a third IV valve and a fourth IV valve; sequentially controlling each IV valve in the IV valve group to close includes:

[0025] sequentially controlling the first IV valve, the second IV valve, the third IV valve and the fourth IV valve to close;

[0026] The controlling all IV valves in the IV valve group to open comprises:

[0027] The first IV valve, the second IV valve, the third IV valve and the fourth IV valve are all controlled to be open.

[0028] In an optional embodiment, the OV valve group includes a first OV valve, a second OV valve, a third OV valve and a fourth OV valve; sequentially controlling each OV valve in the OV valve group to open includes:

[0029] sequentially controlling the first OV valve, the second OV valve, the third OV valve and the fourth OV valve to open;

[0030] The controlling all OV valves in the OV valve group to close includes:

[0031] The first OV valve, the second OV valve, the third OV valve and the fourth OV valve are all controlled to be closed.

[0032] In a second aspect, the present invention provides a solenoid valve noise testing device, which is applied to a controller in a hydraulic brake system, wherein the controller is communicatively connected with a solenoid valve group and a motor of a pressure-building cylinder in the hydraulic brake system; the device comprises:

[0033] A motor control module, configured to control the motor to work after receiving a solenoid valve noise test request, so that the pressure building cylinder starts to build pressure;

[0034] The valve control module is used to control the solenoid valve group to be in different working conditions, and collect noise data of the solenoid valve group under different working conditions through a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal.

[0035] In a third aspect, the present invention provides a hydraulic brake system, comprising a controller, a solenoid valve group and a pressure building cylinder, wherein the controller is communicatively connected with the solenoid valve group and the motor of the pressure building cylinder, and the controller implements the steps of the solenoid valve noise testing method as described in any one of the aforementioned embodiments by executing a computer program.

[0036] In a fourth aspect, the present invention provides a solenoid valve noise testing system, comprising a host computer, a noise measuring instrument and the hydraulic brake system described in the aforementioned embodiment, wherein the host computer is used to send a solenoid valve noise test request to a controller in the hydraulic brake system; the noise measuring instrument is used to collect noise data of the solenoid valve group under different working conditions.

[0037] In a fifth aspect, the present invention provides a vehicle comprising the hydraulic brake system described in the aforementioned embodiment.

[0038] The solenoid valve noise testing method, device, system, hydraulic brake system and vehicle provided by the embodiment of the present invention are applied to the controller in the hydraulic brake system, and the controller is in communication connection with the solenoid valve group and the motor of the pressure-building cylinder in the hydraulic brake system; after receiving the solenoid valve noise test request, the controller controls the motor to work so that the pressure-building cylinder starts to build pressure; the solenoid valve group is controlled to be in different working conditions, and the noise data of the solenoid valve group under different working conditions is collected through the noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal. This method detects the noise of the solenoid valve group under different working conditions, and the detection process is more in line with the actual working scene. It only requires one pressure building and does not require pedal coordination. Compared with the prior art method of individually detecting each valve, it effectively improves the detection efficiency and reduces the detection error rate.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic diagram of a solenoid valve noise testing system provided by an embodiment of the present invention is shown;

[0042] Figure 2 A schematic diagram of a flow chart of a solenoid valve noise testing method provided by an embodiment of the present invention is shown;

[0043] Figure 3 A connection diagram of a solenoid valve group in a hydraulic brake system provided by an embodiment of the present invention is shown;

[0044] Figure 4Another schematic diagram of a flow chart of a solenoid valve noise testing method provided by an embodiment of the present invention is shown;

[0045] Figure 5 An example diagram showing valve control logic and noise determination;

[0046] Figure 6 A functional module diagram of a solenoid valve noise testing device provided in an embodiment of the present invention is shown.

[0047] Icons: 10-solenoid valve noise test system; 100-hydraulic brake system; 200-host computer; 300-noise measuring instrument; 110-controller; 120-solenoid valve group; 130-pressure cylinder; M-motor; 121-TSV valve; 122-SSV valve; 123-PSV valve group; 124-CSV valve group; 125-IV valve group; 126-OV valve group; 1231-first PSV valve; 1232-second PSV valve; 1241-first CSV valve; 1242-second CSV valve; 1251-first IV valve; 1252-second IV valve; 1253-third IV valve; 1254-fourth IV valve; 1261-first OV valve; 1262-second OV valve; 1263-third OV valve; 1264-fourth OV valve; 101-first wheel end; 102-second wheel end; 103-third wheel end; 104-fourth wheel end; 105-first master cylinder; 106-oil pot; 107-simulation chamber; 108-brake pedal; 109-second master cylinder; 600-solenoid valve noise test device; 610-motor control module; 620-valve control module. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0050] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] Please refer to Figure 1 , is a schematic diagram of a composition of a solenoid valve noise testing system 10 provided in an embodiment of the present invention. Figure 1 As shown, the solenoid valve noise test system 10 includes a hydraulic brake system 100, a host computer 200 and a noise meter 300. The hydraulic brake system 100 includes a controller 110, a solenoid valve group 120 and a pressure-building cylinder 130. The host computer 200 is connected to the controller 110 in communication, and the controller 110 is connected to the motor M of the solenoid valve group 120 and the pressure-building cylinder 130 in communication. The noise meter 300 is set in a quiet room. When performing the solenoid valve noise test of the hydraulic brake system of the vehicle, the vehicle can be placed in the quiet room, and the noise data can be collected by the noise meter 300.

[0052] In this embodiment, the controller 110 can be an ECU (Electronic Control Unit); the solenoid valve group 120 includes multiple valves, and the host computer 200 can send a solenoid valve noise test request to the controller 110 through a diagnostic protocol. After receiving the solenoid valve noise test request, the controller 110 starts to execute a preset software logic to control each valve in the solenoid valve group 120 to perform a corresponding action; the noise measuring instrument 300 collects the noise generated when each valve is in action, records and analyzes the noise, and sends an alarm signal after identifying abnormal noise.

[0053] Please refer to Figure 2 , is a flow chart of a solenoid valve noise testing method provided by an embodiment of the present invention. It should be noted that the solenoid valve noise testing method of the present invention is not based on Figure 2 It should be understood that in other embodiments, the order of some steps in the electromagnetic valve noise testing method of the present invention can be interchanged according to actual needs, or some steps can be omitted or deleted. The electromagnetic valve noise testing method can be applied to the controller 110 in the above-mentioned hydraulic brake system 100. Figure 2 The specific process shown is described in detail.

[0054] Step S201, after receiving the solenoid valve noise test request, controlling the motor to operate so that the pressure building cylinder starts to build pressure.

[0055] In this embodiment, after receiving the solenoid valve noise test request sent by the host computer 200, the controller 110 controls the motor M of the pressure building cylinder 130 to work, and drives the piston in the pressure building cylinder 130 to move through the motor M, so that the pressure building cylinder 130 starts to build pressure and generate liquid pressure.

[0056] Step S202, controlling the solenoid valve group to be in different working conditions, and collecting noise data of the solenoid valve group under different working conditions through a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal.

[0057] In this embodiment, when the vehicle is actually braking, there are often multiple valves working simultaneously in the solenoid valve group 120 in the hydraulic brake system 100, that is, each valve does not work completely independently. Therefore, the test of a single valve in the hydraulic brake system in the prior art cannot reflect the noise situation in the actual braking scene, and each time a valve is tested, the pressure-building cylinder 130 needs to build pressure once, so the detection efficiency is low and the detection error rate is high. In this embodiment, the controller 110 only needs to control the pressure-building cylinder 130 to build pressure once, and takes into account various working conditions that may occur when the solenoid valve group 120 is actually working. By controlling the solenoid valve group 120 to be in different working conditions, and collecting the noise data of the solenoid valve group 120 under different working conditions through the noise measuring instrument 300, it can be effectively judged whether each valve in the solenoid valve group is abnormal under different working conditions.

[0058] It can be seen that in the solenoid valve noise test method provided by the embodiment of the present invention, after receiving the solenoid valve noise test request, the controller controls the motor to work so that the pressure-building cylinder starts to build pressure; controls the solenoid valve group to be in different working conditions, and collects the noise data of the solenoid valve group under different working conditions through the noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal. This method detects the noise of the solenoid valve group under different working conditions, and the detection process is more in line with the actual working scene. It only requires one pressure build-up and does not require the cooperation of the pedal. Compared with the prior art method of individually detecting each valve, it effectively improves the detection efficiency and reduces the detection error rate.

[0059] In practical applications, in order to further improve the accuracy and efficiency of electromagnetic valve noise detection, noise detection can be performed on each valve in the hydraulic brake system in a preset order. Based on this, the electromagnetic valve group is controlled to be in different working conditions in the above step S202, specifically including: controlling each valve in the electromagnetic valve group to open or close in a preset order, so that the electromagnetic valve group is in different working conditions.

[0060] In one embodiment, see Figure 3 The solenoid valve group 120 includes a TSV valve 121, an SSV valve 122, a PSV valve group 123, a CSV valve group 124, an IV valve group 125, and an OV valve group 126. The PSV valve group 123 includes a first PSV valve 1231 and a second PSV valve 1232, the CSV valve group 124 includes a first CSV valve 1241 and a second CSV valve 1242; the IV valve group 125 includes a first IV valve 1251, a second IV valve 1252, a third IV valve 1253, and a fourth IV valve 1254; the OV valve group 126 includes a first OV valve 1261, a second OV valve 1262, a third OV valve 1263, and a fourth OV valve 1264.

[0061] The first IV valve 1251 is connected to the first wheel end 101, one end of the first OV valve 1261 is connected between the first IV valve 1251 and the first wheel end 101, and the other end of the first OV valve 1261 is connected to the oil pot 106; the second IV valve 1252 is connected to the second wheel end 102, one end of the second OV valve 1262 is connected between the second IV valve 1252 and the second wheel end 102, and the other end of the second OV valve 1262 is connected to the oil pot 106. The third IV valve 1253 is connected to the third wheel end 103, one end of the third OV valve 1263 is connected between the third IV valve 1253 and the third wheel end 103, and the other end of the third OV valve 1263 is connected to the oil pot 106; the fourth IV valve 1254 is connected to the fourth wheel end 104, one end of the fourth OV valve 1264 is connected between the fourth IV valve 1254 and the fourth wheel end 104, and the other end of the fourth OV valve 1264 is connected to the oil pot 106.

[0062] The pressure building cylinder 130 is connected to the first IV valve 1251 and the second IV valve 1252 through the first PSV valve 1231 , and is connected to the third IV valve 1253 and the fourth IV valve 1254 through the second PSV valve 1232 . The pressure building cylinder 130 is also connected to the oil pot 106 .

[0063] The first master cylinder 105 is connected to the oil pot 106 through the TSV valve 121, is connected to the first IV valve 1251 and the second IV valve 1252 through the first CSV valve 1241, is connected to the oil pot 106 through the SSV valve 122 and the simulation chamber 107, and is also connected to the brake pedal 108; the second master cylinder 109 is connected to the third IV valve 1253 and the fourth IV valve 1254 through the second CSV valve 1242, and is also connected to the oil pot 106.

[0064] In this embodiment, the TSV valve 121 is a test isolation valve; the SSV valve 122 is a simulator isolation valve; the first PSV valve 1231 and the second PSV valve 1232 are piston isolation valves; the first CSV valve 1241 and the second CSV valve 1242 are loop isolation valves; the first IV valve 1251, the second IV valve 1252, the third IV valve 1253 and the fourth IV valve 1254 are booster valves; the first OV valve 1261, the second OV valve 1262, the third OV valve 1263 and the fourth OV valve 1264 are pressure reducing valves. Among them, the IV valve, the CSV valve and the TSV valve are all normally open valves, that is, they are open when the power is off and closed when the power is on; the OV valve, the PSV valve and the SSV valve are all normally closed valves, that is, they are closed when the power is off and open when the power is on.

[0065] Next, combine Figure 3 The specific control process of the solenoid valve group 120 is described in detail. Figure 4 The above steps control the opening or closing of each valve in the solenoid valve group according to a preset sequence so that the solenoid valve group is in different working conditions, specifically including:

[0066] Step S2021, control the PSV valve group to open and control the CSV valve group to close, so that the solenoid valve group is in a first working condition; the noise data corresponding to the first working condition is used to determine whether the PSV valve group and the CSV valve group are abnormal.

[0067] In the hydraulic brake system 100, under normal working conditions, the PSV valve group 123 is energized and the CSV valve group 124 is energized. Since the PSV valve is a normally closed valve and the CSV valve is a normally open valve, the PSV valve group 123 is in an open state and the CSV valve group 124 is in a closed state.

[0068] Specifically, the controller 110 can control the first PSV valve 1231 and the second PSV valve 1232 to be open, and control the first CSV valve 1241 and the second CSV valve 1242 to be closed. At this time, the brake fluid in the pressure-building cylinder 130 will flow through the first PSV valve 1231 and the second PSV valve 1232, and reach the first wheel end 101, the second wheel end 102, the third wheel end 103, and the fourth wheel end 104 through the first IV valve 1251, the second IV valve 1252, the third IV valve 1253 and the fourth IV valve 1254. In this case, it is considered that the solenoid valve group 120 is in the first working condition, and the noise measuring instrument collects the overall noise data of the two PSV valves and the two CSV valves. By comparing the noise data with the preset noise threshold, it is determined whether the two PSV valves and the two CSV valves are abnormal. When an abnormality is found, the four valves can be tested separately to accurately locate the source of the noise.

[0069] Step S2022, sequentially controlling each IV valve in the IV valve group to close so that the solenoid valve group is in the second working condition; the noise data corresponding to the second working condition is used to determine whether each IV valve is abnormal.

[0070] In this embodiment, the controller 110 may sequentially control the first IV valve 1251 , the second IV valve 1252 , the third IV valve 1253 , and the fourth IV valve 1254 to be closed.

[0071] It can be understood that the first IV valve 1251, the second IV valve 1252, the third IV valve 1253 and the fourth IV valve 1254 are normally open valves. When the brake fluid circulates normally, the noise detection of each IV valve is achieved by closing each IV valve in sequence. In this case, the solenoid valve group 120 is considered to be in the second working condition, and the noise data collected by the noise measuring instrument are also used to determine whether each IV valve is abnormal. Compared with closing the IV valve alone, the noise data measured in the process of brake fluid circulation in this embodiment is more accurate, so the detection accuracy is higher.

[0072] It should be noted that the opening size of the IV valve is related to the size of the power-on current, that is, when the IV valve is controlled, the power-on current will gradually increase, and the size of the power-on current determines the flow rate. By obtaining the noise data during the entire power-on process, it is determined whether each IV valve is abnormal. In one example, the maximum noise value during the entire power-on process can be obtained, and the maximum noise value can be compared with the preset noise threshold to determine whether it is abnormal. In another example, the noise data obtained during the entire power-on process can be averaged, and the noise average value can be compared with the preset noise threshold to determine whether it is abnormal.

[0073] Step S2023, control all IV valves in the IV valve group to open, and control each OV valve in the OV valve group to open in turn, so that the solenoid valve group is in the third working condition; the noise data corresponding to the third working condition is used to determine whether each OV valve is abnormal.

[0074] When the controller 110 controls all IV valves in the IV valve group 125 to open, the first IV valve 1251, the second IV valve 1252, the third IV valve 1253, and the fourth IV valve 1254 can all be controlled to open. When the controller 110 sequentially controls each OV valve in the OV valve group 126 to open, the first OV valve 1261, the second OV valve 1262, the third OV valve 1263, and the fourth OV valve 1264 can be sequentially controlled to open.

[0075] In this embodiment, after all IV valves are tested, all IV valves need to be opened, and each OV valve is opened in turn, so that the braking force of each wheel end is released. In this process, the solenoid valve group 120 is considered to be in the third working condition, and each OV valve is judged whether it is abnormal based on the noise data collected by the noise measuring instrument.

[0076] Step S2024, control all OV valves in the OV valve group to close, and control the CSV valve group to open, so that the solenoid valve group is in the fourth working condition; the noise data corresponding to the fourth working condition is used to determine whether the CSV valve group is abnormal.

[0077] When the controller 110 controls all OV valves in the OV valve group 126 to be closed, the first OV valve 1261, the second OV valve 1262, the third OV valve 1263 and the fourth OV valve 1264 can all be closed. When the controller 110 controls the CSV valve group 124 to be open, the first CSV valve 1241 and the second CSV valve 1242 can all be opened.

[0078] In this embodiment, although the first CSV valve 1241 and the second CSV valve 1242 are powered off, noise may still be generated due to the pressure at the wheel end. In this case, the solenoid valve group 120 is considered to be in the fourth working condition, and whether the first CSV valve 1241 and the second CSV valve 1242 are abnormal is also determined based on the noise data collected by the noise measuring instrument.

[0079] It should be noted that although step S2021 also involves noise detection of the CSV valve, it measures the noise data of the two PSV valves and the two CSV valves as a whole; and through the detection of the first CSV valve 1241 and the second CSV valve 1242 in step S2024, it is possible to further accurately determine whether the first CSV valve 1241 and the second CSV valve 1242 are abnormal.

[0080] Step S2025, control the second CSV valve in the CSV valve group to close and control the TSV valve to close, so that the solenoid valve group is in the fifth working condition; the noise data corresponding to the fifth working condition is used to determine whether the TSV valve is abnormal; the second CSV valve and the TSV valve are connected to different master cylinders.

[0081] In this embodiment, after the second CSV valve 1242 and the TSV valve 121 are closed, the sound of the TSV valve 121 when there is brake fluid can be collected to determine whether there is an abnormality. At this time, there is brake fluid in the first master cylinder 105 and it has not returned to the oil pot 106. The first CSV valve 1241 is still open, and the brake fluid will enter the wheel end through the first CSV valve 1241; and since the second CSV valve 1242 has been opened in step S2024, the brake fluid directly returns to the oil pot 106.

[0082] Step S2026, control the SSV valve to open so that the solenoid valve group is in the sixth operating condition; the noise data corresponding to the sixth operating condition is used to determine whether the SSV valve is abnormal.

[0083] In this embodiment, by controlling the SSV valve 122 to open, the brake fluid will enter the simulation chamber 107 through the SSV valve 122, and then return to the oil pot 106. In this case, it is considered that the solenoid valve group 120 is in the sixth working condition, and whether the SSV valve 122 is abnormal is determined based on the noise data collected by the noise measuring instrument.

[0084] It should be noted that, since the first PSV valve 1231 and the second PSV valve 1232 are opened in step S2021, they are always in the open state during the subsequent detection process, and there will be some noise. Therefore, in the noise abnormality judgment in each subsequent step, when setting the noise threshold under different working conditions, the noise of the first PSV valve 1231 and the second PSV valve 1232 can be taken into account, thereby improving the detection accuracy.

[0085] In practical applications, in order to further improve the detection accuracy, when performing noise tests under each working condition, the corresponding solenoid valves can be repeatedly switched on and off multiple times, and the abnormality of each valve can be determined based on the multiple test results under each working condition. Figure 5 As shown, it is assumed that two test operations are performed for each working condition, and the noise data collected by the noise measuring instrument is used to determine whether the corresponding valve is abnormal. When any noise test of a valve exceeds the set noise threshold, the valve is judged to be abnormal; if any valve test is abnormal, the test is judged to have failed.

[0086] It can be seen that by detecting the noise of each valve in the solenoid valve group 120 under different working conditions through the above steps, only one pressure build-up is required and no pedal cooperation is required to complete the offline detection, thereby improving the detection efficiency and reducing the detection error rate. Moreover, after the test is completed, the switch status of each valve is correct and no additional adjustment is required.

[0087] In order to execute the corresponding steps in the above embodiments and various possible methods, a method for implementing a solenoid valve noise testing device is provided below. Figure 6 , which is a functional module diagram of the solenoid valve noise test device 600 provided in an embodiment of the present invention. It should be noted that the basic principle and technical effect of the solenoid valve noise test device 600 provided in this embodiment are the same as those of the above embodiment. For the sake of brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding contents in the above embodiment. The solenoid valve noise test device 600 includes: a motor control module 610 and a valve control module 620.

[0088] The motor control module 610 is used to control the motor to work after receiving the solenoid valve noise test request, so that the pressure building cylinder starts to build pressure.

[0089] It can be understood that the motor control module 610 can execute the above step S201.

[0090] The valve control module 620 is used to control the solenoid valve group to be in different working conditions, and collect the noise data of the solenoid valve group under different working conditions through a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal.

[0091] It can be understood that the valve control module 620 can execute the above step S202.

[0092] Optionally, the valve control module 620 is used to control each valve in the solenoid valve group to open or close according to a preset sequence, so that the solenoid valve group is in different working conditions.

[0093] Optionally, the valve control module 620 is specifically used to control the PSV valve group to open and the CSV valve group to close, so that the solenoid valve group is in a first working condition; the noise data corresponding to the first working condition is used to determine whether the PSV valve group and the CSV valve group are abnormal; the IV valves in the IV valve group are controlled to close in sequence, so that the solenoid valve group is in a second working condition; the noise data corresponding to the second working condition is used to determine whether the IV valves are abnormal; all IV valves in the IV valve group are controlled to open, and the OV valves in the OV valve group are controlled to open in sequence, so that the solenoid valve group is in a third working condition; the noise data corresponding to the third working condition is used to determine whether the OV valves are abnormal. Whether the valve is abnormal; control all OV valves in the OV valve group to close, and control the CSV valve group to open, so that the solenoid valve group is in the fourth working condition; the noise data corresponding to the fourth working condition is used to judge whether the CSV valve group is abnormal; control the second CSV valve in the CSV valve group to close and control the TSV valve to close, so that the solenoid valve group is in the fifth working condition; the noise data corresponding to the fifth working condition is used to judge whether the TSV valve is abnormal; the second CSV valve and the TSV valve are connected to different master cylinders; control the SSV valve to open, so that the solenoid valve group is in the sixth working condition; the noise data corresponding to the sixth working condition is used to judge whether the SSV valve is abnormal.

[0094] Optionally, when controlling the PSV valve group to open and the CSV valve group to close, the valve control module 620 is specifically used to control both the first PSV valve and the second PSV valve to open, and to control both the first CSV valve and the second CSV valve to close.

[0095] Optionally, the valve control module 620 controls the CSV valve group to open, specifically to control both the first CSV valve and the second CSV valve to open.

[0096] Optionally, when the valve control module 620 sequentially controls each IV valve in the IV valve group to close, it is specifically used to sequentially control the first IV valve, the second IV valve, the third IV valve and the fourth IV valve to close.

[0097] Optionally, when controlling all IV valves in the IV valve group to open, the valve control module 620 is specifically configured to control the first IV valve, the second IV valve, the third IV valve and the fourth IV valve to open.

[0098] Optionally, when the valve control module 620 sequentially controls each OV valve in the OV valve group to open, it is specifically used to sequentially control the first OV valve, the second OV valve, the third OV valve and the fourth OV valve to open.

[0099] Optionally, when controlling all OV valves in the OV valve group to be closed, the valve control module 620 is specifically used to control the first OV valve, the second OV valve, the third OV valve and the fourth OV valve to be closed.

[0100] It can be seen that the solenoid valve noise testing device provided by the embodiment of the present invention includes a motor control module and a valve control module. The motor control module is used to control the motor to work after receiving the solenoid valve noise test request, so that the pressure-building cylinder starts to build pressure; the valve control module is used to control the solenoid valve group to be in different working conditions, and collect the noise data of the solenoid valve group under different working conditions through the noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal. By detecting the noise conditions of the solenoid valve group under different working conditions, the detection process is more in line with the actual working scene, only one pressure building is required and no pedal coordination is required. Compared with the prior art method of individually detecting each valve, the detection efficiency is effectively improved and the detection error rate is reduced.

[0101] An embodiment of the present invention further provides a vehicle, which includes the hydraulic brake system in the aforementioned embodiment.

[0102] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0103] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0104] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A solenoid valve noise testing method, characterized in that: A controller applied to a hydraulic brake system, wherein the controller is in communication connection with a solenoid valve group and a motor of a pressure-building cylinder in the hydraulic brake system; the method comprises: After receiving the solenoid valve noise test request, controlling the motor to work so that the pressure building cylinder starts to build pressure; The solenoid valve group is controlled to be in different working conditions, and noise data of the solenoid valve group under different working conditions is collected by a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal.

2. The solenoid valve noise testing method according to claim 1, characterized in that: The controlling the solenoid valve group to be in different working conditions includes: Each valve in the solenoid valve group is controlled to open or close according to a preset sequence, so that the solenoid valve group is in different working conditions.

3. The solenoid valve noise testing method according to claim 2, characterized in that: The solenoid valve group includes a TSV valve, an SSV valve, a PSV valve group, a CSV valve group, an IV valve group and an OV valve group; the valves in the solenoid valve group are controlled to open or close in a preset sequence so that the solenoid valve group is in different working conditions, including: Controlling the PSV valve group to open and controlling the CSV valve group to close so that the solenoid valve group is in a first working condition; the noise data corresponding to the first working condition is used to determine whether the PSV valve group and the CSV valve group are abnormal; Controlling each IV valve in the IV valve group to close in sequence, so that the solenoid valve group is in a second working condition; the noise data corresponding to the second working condition is used to determine whether each IV valve is abnormal; Controlling all IV valves in the IV valve group to open, and sequentially controlling each OV valve in the OV valve group to open, so that the solenoid valve group is in a third working condition; the noise data corresponding to the third working condition is used to determine whether each OV valve is abnormal; Controlling all OV valves in the OV valve group to close, and controlling the CSV valve group to open, so that the solenoid valve group is in a fourth working condition; the noise data corresponding to the fourth working condition is used to determine whether the CSV valve group is abnormal; Control the second CSV valve in the CSV valve group to close and control the TSV valve to close, so that the solenoid valve group is in the fifth working condition; the noise data corresponding to the fifth working condition is used to determine whether the TSV valve is abnormal; the second CSV valve and the TSV valve are connected to different master cylinders; The SSV valve is controlled to open so that the solenoid valve group is in a sixth operating condition; the noise data corresponding to the sixth operating condition is used to determine whether the SSV valve is abnormal.

4. The solenoid valve noise testing method according to claim 3, characterized in that: The PSV valve group includes a first PSV valve and a second PSV valve, and the CSV valve group includes a first CSV valve and a second CSV valve; The controlling the PSV valve group to open and the controlling the CSV valve group to close comprises: Controlling the first PSV valve and the second PSV valve to be opened, and controlling the first CSV valve and the second CSV valve to be closed; The controlling the CSV valve group to open comprises: Control the first CSV valve and the second CSV valve to open.

5. The solenoid valve noise testing method according to claim 3, characterized in that: The IV valve group includes a first IV valve, a second IV valve, a third IV valve and a fourth IV valve; and sequentially controlling each IV valve in the IV valve group to close includes: sequentially controlling the first IV valve, the second IV valve, the third IV valve and the fourth IV valve to close; The controlling all IV valves in the IV valve group to open comprises: The first IV valve, the second IV valve, the third IV valve and the fourth IV valve are all controlled to be open.

6. The solenoid valve noise testing method according to claim 3, characterized in that: The OV valve group includes a first OV valve, a second OV valve, a third OV valve and a fourth OV valve; sequentially controlling each OV valve in the OV valve group to open includes: sequentially controlling the first OV valve, the second OV valve, the third OV valve and the fourth OV valve to open; The controlling all OV valves in the OV valve group to close includes: The first OV valve, the second OV valve, the third OV valve and the fourth OV valve are all controlled to be closed.

7. A solenoid valve noise testing device, characterized in that: A controller used in a hydraulic brake system, wherein the controller is in communication connection with a solenoid valve group and a motor of a pressure-building cylinder in the hydraulic brake system; the device comprises: A motor control module, configured to control the motor to work after receiving a solenoid valve noise test request, so that the pressure building cylinder starts to build pressure; The valve control module is used to control the solenoid valve group to be in different working conditions, and collect noise data of the solenoid valve group under different working conditions through a noise measuring instrument, so as to determine whether each valve in the solenoid valve group is abnormal.

8. A hydraulic brake system, characterized in that: It includes a controller, a solenoid valve group and a pressure building cylinder. The controller is communicatively connected with the solenoid valve group and the motor of the pressure building cylinder. The controller implements the steps of the solenoid valve noise testing method as described in any one of claims 1 to 6 by executing a computer program.

9. A solenoid valve noise testing system, characterized in that: It comprises a host computer, a noise measuring instrument and the hydraulic brake system as claimed in claim 8, wherein the host computer is used to send a solenoid valve noise test request to a controller in the hydraulic brake system; and the noise measuring instrument is used to collect noise data of the solenoid valve group under different working conditions.

10. A vehicle, characterized in that: Includes the hydraulic brake system as described in claim 8.

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