Performance detection method for electrically controlled brake master valve

Abstract

The invention relates to the technical field of vehicle part detection, in particular to a method for detecting the performance of an electric control brake master valve. The invention provides a method for detecting the performance of an electrically-controlled brake master valve. The method comprises the following steps: a preparation process before a test; inputting a test starting instruction, and testing the electrically-controlled brake master valve to be tested according to a set test sequence; the position of a brake pedal and the position of an air inlet electromagnetic valve of the electric control brake master valve are changed, and the input and output characteristics of the electric control brake master valve are detected according to set test conditions. The invention provides an electric control brake master valve performance detection method, which realizes automatic detection of the characteristics of an electric control brake master valve, can be used for detecting the input and output characteristics of the master valve, including the relationship between an angle signal and a master valve output signal, can improve the consistency problem of the feeling of a brake pedal of a bidirectional driving electronic guide rubber wheel electric vehicle, and improves the safety of the electric vehicle. And whether the product has a quality problem is checked.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle component detection, and more specifically to a method for detecting the performance of an electronically controlled brake master valve. Background Art

[0002] The electronically guided rubber-tyred tram is a new type of virtual rail transit vehicle that can travel in both directions and has multiple sections. This type of two-way vehicle is usually equipped with two driver's cabs, and the configuration of the front and rear driver's cabs is basically the same. As a new type of transportation, the single route of the electronically guided rubber-tyred tram is generally around 20 kilometers, and the one-way travel time is about 40 minutes.

[0003] Due to the special characteristics of the two-way travel of the electronically guided rubber-tyred tram, the driver needs to change the end at both the departure station and the terminal. At this time, the consistency of the driving operation end is crucial to the driver's experience. For example, the ambient temperature of the cab, the hand force on the steering wheel, the feel of the accelerator pedal, the feel of the brake pedal, etc. all need to be kept consistent.

[0004] The braking system is a key subsystem of the vehicle, providing the driver with an operating interface - the electronically controlled brake master valve (with brake pedal). When the driver needs to decelerate according to the road conditions, the braking force is controlled by the depth of the brake pedal.

[0005] Therefore, an automated detection method for the characteristics of the electric control brake master valve is urgently needed during factory inspection (supplier), incoming material inspection (main engine manufacturer) and operation abnormality inspection (operating company).

[0006] At present, there are usually many master valve detection devices and methods in the prior art, but basically they all test the output characteristic relationship between the master valve push rod stroke and the master valve analog signal and the gas signal by removing the brake pedal. However, even if the characteristic relationship between the push rod stroke and the master valve output is well controlled, many pedal feel consistency phenomena still occur at the operation site. Summary of the invention

[0007] The purpose of the present invention is to provide a method for detecting the performance of an electronically controlled brake master valve, so as to solve the problem in the prior art that the consistency of the electronically controlled brake master valve is difficult to detect accurately.

[0008] In order to achieve the above object, the present invention provides a method for detecting the performance of an electronically controlled brake master valve, comprising the following steps:

[0009] Pre-test preparation process;

[0010] Input the start test command to test the electrically controlled brake main valve under test according to the set test sequence;

[0011] Change the brake pedal position and the position of the solenoid valve at the air inlet of the electronically controlled brake master valve, and test the input and output characteristics of the electronically controlled brake master valve according to the set test conditions.

[0012] In one embodiment, the pre-test preparation process further includes:

[0013] Place the electrically controlled brake main valve to be tested on the fixture table;

[0014] Connect the power supply, gas source, etc. of the detection device;

[0015] Set the parameters of the tested electric control brake main valve;

[0016] The tested electric control brake main valve is fixed and clamped, the air control port is sealed and the telescopic arm of the fixture is reset to zero.

[0017] In one embodiment, placing the brake pedal in an initial position;

[0018] Control the air inlet solenoid valve of the electronically controlled brake master valve to the inflation position;

[0019] Inflate the air from the air inlet of the tested electronically controlled brake master valve to the rated working pressure of the brake master valve;

[0020] The solenoid valve at the main valve inlet is placed in the cut-off position. After the pressure is stabilized for a certain period of time, the actual pressure drop of the pressure sensor is recorded;

[0021] The actual pressure drop is compared with the non-working leakage pressure judgment value of the test product model. When the actual pressure drop is less than the judgment value, the program judges it as qualified.

[0022] In one embodiment, placing the brake pedal in an initial position;

[0023] Control the air inlet solenoid valve of the electronically controlled brake master valve to the inflation position;

[0024] Inflate the air from the air inlet of the test product to the rated working pressure of the brake master valve;

[0025] Control the brake pedal to the full working range and keep it stable;

[0026] Place the electromagnetic valve at the air inlet of the electronically controlled brake master valve in the cut-off position, stabilize the pressure for a certain period of time, and then record the actual pressure drop of the pressure sensor;

[0027] The actual pressure drop is compared with the non-working leakage pressure judgment value of the test product model. When the actual pressure drop is less than the judgment value, the program judges it as qualified.

[0028] In one embodiment, the solenoid valve of the air inlet of the electrically controlled brake master valve is placed in the inflation position;

[0029] Inflate the air from the air inlet of the tested electric control brake main valve to the rated working pressure of the electric control brake main valve;

[0030] Actuate the brake pedal to move at a certain rate from zero stroke to full stroke;

[0031] Record the parameters of the brake master valve;

[0032] The measured values ​​of the pedal characteristic parameters are measured and compared with the standard values. When all parameters are judged to be qualified, the test procedure is judged to be qualified.

[0033] In one embodiment, the electronically controlled brake master valve performance detection method further includes: unloading the test product and outputting a test report.

[0034] In one embodiment, the master brake valve parameters include: the air pressure at the air outlets of the master brake valves P21 and P22, the pedal force, and the relationship curves between the voltage and angle of interfaces 61 and 62.

[0035] In one embodiment, the pedal characteristic parameters include: zero position angle, forward distance, switch angle, zero position voltage, electric-pneumatic travel and air-pneumatic travel.

[0036] The present invention provides a method for detecting the performance of an electronically controlled brake master valve, which realizes automated detection of the characteristics of an electronically controlled brake master valve. The method can be used to detect the input and output characteristics of the master valve, including the relationship between an angle signal and an output signal of the master valve. The method can improve the consistency of the brake pedal feel of a bidirectional electronically guided rubber-wheeled electric vehicle and check whether the product has quality problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0038] Figure 1 A flow chart of a method for detecting performance of an electronically controlled brake master valve according to an embodiment of the present invention is disclosed;

[0039] Figure 2 A schematic structural diagram of an electronically controlled brake master valve performance detection device according to an embodiment of the present invention is disclosed;

[0040] Figure 3 An internal schematic diagram of an electronically controlled brake master valve performance detection device according to an embodiment of the present invention is disclosed;

[0041] Figure 4 A side schematic diagram of a fixture table according to an embodiment of the present invention is disclosed;

[0042] Figure 5 A top view of a fixture table according to an embodiment of the present invention is disclosed;

[0043] Figure 6 A partial schematic diagram of a fixture table according to an embodiment of the present invention is disclosed.

[0044] The meanings of the reference numerals in the figures are as follows:

[0045] 1. Control system;

[0046] 11 Industrial computer;

[0047] 12 displays;

[0048] 2 fixture table;

[0049] 21 Pipeline device;

[0050] 211 Intake and exhaust cylinders are tightened;

[0051] 212 air cylinder;

[0052] 22 force measuring device;

[0053] 221 servo motor;

[0054] 222 gearbox;

[0055] 223 transmission shaft;

[0056] 224 bearings;

[0057] 225 fixed frame;

[0058] 226 longitudinal telescopic arm;

[0059] 227 lateral telescopic arm;

[0060] 228 test probe;

[0061] 229 force sensor;

[0062] 23 angle measuring device;

[0063] 3. Operation table;

[0064] 31 profile trusses;

[0065] 32 Sheet Metal Panels. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0067] Figure 1 A flow chart of a method for detecting performance of an electronically controlled brake master valve according to an embodiment of the present invention is disclosed. Figure 1As shown, a method for detecting the performance of an electronically controlled brake master valve proposed by the present invention comprises the following steps:

[0068] Pre-test preparation process;

[0069] Input the start test command to test the electrically controlled brake main valve under test according to the set test sequence;

[0070] Change the brake pedal position and the position of the solenoid valve at the air inlet of the control master valve, and test the input and output characteristics of the electronically controlled brake master valve according to the set test conditions.

[0071] Figure 2 The present invention discloses a schematic diagram of the structure of an electronically controlled brake master valve performance detection device according to an embodiment of the present invention. Figure 3 The internal schematic diagram of the electronically controlled brake master valve performance detection device according to an embodiment of the present invention is disclosed. Figure 2 and Figure 3 As shown, the electronically controlled brake master valve performance detection device proposed by the present invention comprises a control system 1, a fixture table 2 and an operating table 3:

[0072] The fixture table 2 is connected to the operating table 3 through a mechanical connection, and is installed on the operating table 3 for placing the electric control brake main valve;

[0073] The control system 1 is connected to the operating table 3 through a mechanical connection, and is installed on the operating table 3;

[0074] The control system 1 is connected to the fixture table 2 through an electrical connection, and is used to control the test conditions of the electric-controlled brake master valve and detect the input and output characteristics of the electric-controlled brake master valve.

[0075] The operating table is used to provide the overall framework of the device.

[0076] In this embodiment, the control system 1 is composed of an industrial computer 11, a display 12, a servo control system, a pipeline control system, and an electrical control system:

[0077] The industrial computer 11 carries the control software and is used to operate the entire detection device;

[0078] The display 12 is a human-machine interface between the system and the operator;

[0079] The servo control system controls the servo motor to drive the fixture device of the fixture table to rotate;

[0080] The pipeline control system controls the on-off of the main valve intake and exhaust pipelines;

[0081] The electrical control system controls the operation of the electrical equipment of the detection device.

[0082] In this embodiment, the servo control system, the pipeline control system, and the electrical control system are all integrated in the industrial computer 11 .

[0083] Figure 4-Figure 6 The side view, top view and partial view of the fixture table according to an embodiment of the present invention are respectively disclosed. Figure 4-Figure 6 As shown, the fixture table 2 is composed of a pipeline device 21, a force measuring device 22, an angle measuring device 23, an analog signal measuring device, a pressure signal measuring device, and a switch signal measuring device:

[0084] Through the cooperation of the industrial computer 11, the force measuring device 22, the angle measuring device 23, etc., the sealing characteristics of the main valve, the pedal angle-analog signal characteristic relationship, the pedal angle-pedal force characteristic relationship, the pedal angle-gas signal characteristic relationship, the gas-pneumatic stroke, the electric-pneumatic stroke, the zero point signal and other pedal characteristics can be detected.

[0085] Furthermore, the pipeline device 21 includes three pneumatic source components, a booster valve, a proportional control valve, an intake and exhaust tightening cylinder 211, a tightening cylinder for fixing the main valve, an air cylinder 212, a solenoid valve, pipeline accessories, etc.:

[0086] The pneumatic three-source component is an air source processing component, through which the air source can be purified and filtered to reach the pressure required by the system;

[0087] The booster valve increases the input pressure to a certain pressure and then outputs it;

[0088] The proportional regulating valve adjusts the air pressure proportionally and then outputs it;

[0089] The intake and exhaust pressing cylinder 211 uses the push rod extending from the cylinder to press against the intake inlet and exhaust outlet of the electric control brake master valve;

[0090] The pressing cylinder for fixing the main valve is used to press on the main valve base after the main valve is installed, so as to fix the main valve firmly and prevent it from moving;

[0091] The air cylinder 212 is used to store wind pressure;

[0092] The solenoid valve is used to control the air pressure flow direction of the pipeline.

[0093] Furthermore, the force measuring device 22 includes a servo motor 221, a gearbox 222, a transmission shaft 223, a bearing 224, a fixing frame 225, a longitudinal telescopic arm 226, a transverse telescopic arm 227, a test probe 228, a force sensor 229, etc.:

[0094] The servo motor 221 receives the control signal of the industrial computer and outputs it, and rotates to drive the telescopic arm to rotate;

[0095] The gearbox 222 decelerates and increases torque of the output of the servo motor 221;

[0096] The transmission shaft 223 transmits motion and force;

[0097] The bearing 224 is used to position and fix the rotating part;

[0098] The fixing frame 225 is used to provide a mounting bracket, similar to a mounting frame;

[0099] The longitudinal telescopic arm 226 is used for longitudinal telescopic adjustment;

[0100] The transverse telescopic arm 227 is used for transverse telescopic adjustment;

[0101] The test probe 228 is used to contact the contact piece of the pedal on the electric control brake master valve;

[0102] The force sensor 229 is used to collect the magnitude of the force applied to the probe.

[0103] Furthermore, the angle measuring device 23 includes a servo motor, a gearbox, a transmission shaft, a bearing, a fixing frame, a longitudinal telescopic arm, a transverse telescopic arm, a test probe, an angle encoder, etc.:

[0104] The servo motor receives the control signal of the industrial computer and outputs it, and rotates to drive the telescopic arm to rotate;

[0105] The gearbox decelerates and increases torque of the output of the servo motor;

[0106] The transmission shaft transmits motion and force;

[0107] The bearing is used to position and fix the rotating parts;

[0108] The fixing frame is used to provide a mounting bracket;

[0109] The longitudinal telescopic arm is used for longitudinal telescopic adjustment;

[0110] The transverse telescopic arm is used for transverse telescopic adjustment;

[0111] The test probe is used to contact the contact piece of the pedal on the electric control brake master valve;

[0112] The angle encoder is used to detect the rotation angle of the telescopic arm.

[0113] The force measuring device 22 and the angle measuring device 23 share basic common components and can realize the measurement of pedal force and pedal angle.

[0114] The analog signal measuring device is composed of an industrial computer, an AIO board, an electrical wiring harness, etc.

[0115] The air pressure signal measuring device is composed of an industrial computer, an AIO board, an electrical wiring harness, an air pressure sensor, etc.

[0116] The switch signal measuring device is composed of an industrial computer, a DIO board, an electrical wiring harness, etc.

[0117] The industrial computer is a computer system used to process data and achieve target control;

[0118] The AIO board is a collection board for collecting analog data;

[0119] The DIO board is a collection board for collecting switch quantity data;

[0120] The electrical harness is a general term for all cables that need to be connected;

[0121] The air pressure sensor is a sensor used to collect air pressure.

[0122] In this embodiment, the AIO board and the DIO board are integrated into the industrial computer.

[0123] In this embodiment, the operating platform 3 is composed of a profile truss 31 and a sheet metal panel 32:

[0124] The profile truss 31 is used to build the framework of the test device and fix the control system, fixture table and other equipment;

[0125] The sheet metal panel 32 is used to connect the trusses.

[0126] Based on the above-mentioned electronically controlled brake master valve performance detection device, a new brake master valve detection method proposed by the present invention is further explained, which can detect the sealing characteristics of the master valve, the pedal angle-analog signal characteristic relationship, the pedal angle-pedal force characteristic relationship, the pedal angle-air signal characteristic relationship, the air-air stroke, the electric-air stroke, the zero point signal and other pedal characteristics in place at one time.

[0127] The electronically controlled brake master valve performance detection method has the following specific operating steps:

[0128] Pre-test preparation process: Place the test product on the fixture table, connect the power supply and gas source of the detection device, and open the test software;

[0129] Enter the program, select the model of the test product, fill in the serial number of the test product, operate the "Load Test Product" button on the program interface, and the fixture table will automatically fix the test product, seal the air control port, and return the telescopic arm of the fixture to zero.

[0130] Press the "Start Test" button on the operation program interface, and the test device will automatically test the test product according to the set test sequence;

[0131] Change the brake pedal position and the position of the solenoid valve at the air inlet of the control master valve, and test the input and output characteristics of the brake master valve according to the set test conditions.

[0132] More specifically, the test device places the brake pedal in the initial position, controls the main valve air inlet solenoid valve to the inflation position, inflates air from the test product's air inlet to the rated working air pressure of the brake main valve (such as 1000kPa), and then places the main valve air inlet solenoid valve in the cut-off position. After stabilizing the pressure for a certain period of time (such as 2 minutes), the pressure drop of the pressure sensor thereafter (such as 5 minutes) is recorded; and the pressure is judged against the non-working leakage pressure judgment value (such as 10kPa) of the test product model. When the actual pressure drop is less than the judgment value, the program judges it as qualified.

[0133] More specifically, the test device places the brake pedal in the initial position, controls the solenoid valve at the main valve air inlet to the inflation position, inflates air from the air inlet of the test product to the rated working air pressure value of the brake main valve (such as 1000kPa), and then controls the brake pedal to the full working stroke and keeps it stable, and then places the solenoid valve at the main valve air inlet to the cut-off position. After stabilizing the pressure for a certain period of time (such as 2 minutes), the pressure drop of the pressure sensor thereafter (such as 5 minutes) is recorded; and it is judged against the non-working leakage pressure judgment value (such as 20kPa) of the test product model. When the actual pressure drop is less than the judgment value, the program judges it as qualified.

[0134] More specifically, the test device places the solenoid valve at the main valve air inlet in the inflation position, inflates the air from the test product's air inlet to the rated working pressure of the brake master valve (such as 1000kPa), drives the brake pedal to move at a certain speed (such as 0.4±0.1mm / s) from zero stroke to full stroke, and records the parameters of the brake master valve at the same time; and measures the pedal characteristic parameter values ​​for comparison and judgment. When all parameters are judged to be qualified, the test procedure is judged to be qualified.

[0135] In this embodiment, the brake master valve parameters include: the relationship curve between the air pressure at the brake master valve P21 and P22 outlets, the pedal force, and the voltage and angle at the 61 and 62 interfaces;

[0136] The pedal characteristic parameters include: zero position angle, forward distance, switch angle, zero position voltage, electric-pneumatic stroke and air-pneumatic stroke.

[0137] Furthermore, after the test procedures are all completed, the test device unloads the test product and outputs a test report.

[0138] The present invention proposes a method for detecting an electronically controlled brake master valve, which can detect various pedal characteristics of the master valve at one time, including sealing characteristics, pedal angle-analog signal characteristic relationship, pedal angle-pedal force characteristic relationship, pedal angle-gas signal characteristic relationship, gas-air stroke, electric-air stroke and zero-point signal, etc. The detection results are used to determine whether the master valve characteristics meet the requirements, thereby meeting the detection requirements of the master valve characteristics. In addition, the application of this method can effectively improve the consistency of the brake pedal feel of bidirectional electronic guided rubber-wheeled electric vehicles, and further detect product quality.

[0139] Although the above methods are illustrated and described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0140] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0141] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A method for detecting the performance of an electronically controlled brake master valve, characterized in that: The following steps are involved: Pre-test preparation process; Input the start test command to test the electrically controlled brake main valve under test according to the set test sequence; Change the brake pedal position and the position of the solenoid valve at the air inlet of the electronically controlled brake master valve, and test the input and output characteristics of the electronically controlled brake master valve according to the set test conditions.

2. The method for detecting the performance of an electronically controlled brake master valve according to claim 1, characterized in that: The pre-test preparation process further includes: Place the electrically controlled brake main valve to be tested on the fixture table; Connect the power supply, gas source, etc. of the detection device; Set the parameters of the tested electric control brake main valve; The tested electric control brake main valve is fixed and clamped, the air control port is sealed and the telescopic arm of the fixture is reset to zero.

3. The method for detecting the performance of an electronically controlled brake master valve according to claim 1, characterized in that: Put the brake pedal in the initial position; The solenoid valve of the air inlet of the electronically controlled brake master valve is placed in the inflation position; Fill the air from the air inlet of the tested electric control brake master valve to the rated working pressure of the electric control brake master valve; The solenoid valve at the air inlet of the electronically controlled brake master valve is placed in the cut-off position. After the pressure is stabilized for a certain period of time, the actual pressure drop of the pressure sensor is recorded; The actual pressure drop is compared with the non-working leakage pressure judgment value of the test product model. When the actual pressure drop is less than the judgment value, the program judges it as qualified.

4. The method for detecting the performance of an electronically controlled brake master valve according to claim 1, characterized in that: Put the brake pedal in the initial position; The solenoid valve of the air inlet of the electronically controlled brake master valve is placed in the inflation position; Inflate the air from the air inlet of the tested electric control brake main valve to the rated working pressure of the electric control brake main valve; Control the brake pedal to the full working range and keep it stable; Place the electromagnetic valve at the air inlet of the electronically controlled brake master valve in the cut-off position, stabilize the pressure for a certain period of time, and then record the actual pressure drop of the pressure sensor; The actual pressure drop is compared with the non-working leakage pressure judgment value of the test product model. When the actual pressure drop is less than the judgment value, the program judges it as qualified.

5. The method for detecting the performance of an electronically controlled brake master valve according to claim 1, characterized in that: Place the main valve air inlet solenoid valve in the inflation position; Inflate the air from the air inlet of the tested electric control brake main valve to the rated working pressure of the electric control brake main valve; Actuate the brake pedal to move at a certain rate from zero stroke to full stroke; Record the parameters of the brake master valve; The measured values ​​of the pedal characteristic parameters are measured and compared with the standard values. When all parameters are judged to be qualified, the test procedure is judged to be qualified.

6. The method for detecting the performance of an electronically controlled brake master valve according to claim 1, characterized in that: Also includes: Uninstall the electrically controlled main valve under test and output the test report.

7. The method for detecting the performance of an electronically controlled brake master valve according to claim 5, characterized in that: The electronically controlled brake master valve parameters include: the air pressure at the air outlets of the electronically controlled brake master valves P21 and P22, the pedal force, and the relationship curves between the voltage and angle of interfaces 61 and 62.

8. The method for detecting the performance of an electronically controlled brake master valve according to claim 5, characterized in that: The pedal characteristic parameters include: zero position angle, forward distance, switch angle, zero position voltage, electric-pneumatic stroke and air-pneumatic stroke.

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