Testing device for electric control exhaust brake valve

Abstract

The utility model relates to the field of testing tools, in particular to a testing device for an electric control exhaust brake valve, which comprises an upper computer, an engine for burning fuel, a back pressure sensor assembly for testing the back pressure of the engine and a rotating speed sensor assembly for testing the rotating speed of the engine. The upper computer is provided with a communication interface used for being electrically connected with the electric control exhaust brake valve, and a feedback signal of the electric control exhaust brake valve is sent to the upper computer through the communication interface; the engine is provided with an exhaust pipe, and the backpressure sensor assembly is connected to the exhaust pipe. The engine is provided with an output shaft, and the rotating speed sensor assembly is arranged on the output shaft. The engine, the back pressure sensor assembly and the rotating speed sensor assembly are electrically connected with the upper computer. According to the testing device used for the electric control exhaust brake valve, the back pressure of the engine can be obtained through the arrangement of the back pressure sensor assembly, and the rotating speed of the output shaft of the engine can be obtained through the arrangement of the rotating speed sensor assembly.

Description

Technical Field

[0001] The utility model relates to the field of testing tools, in particular to a testing device for an electronically controlled exhaust brake valve. Background Art

[0002] In the prior art, there is provided a patent document named as performance testing equipment for vehicle exhaust auxiliary brake valve and application number 201720109464.5; in this patent document, there is specifically provided a testing equipment consisting of a burner, multiple pipes, a temperature sensor and a pressure sensor, wherein the temperature sensor is used to obtain the intake temperature and the exhaust temperature of the burner, as well as the intake pressure and the exhaust pressure of the burner.

[0003] In the above-mentioned prior art, in essence, an ideal environment is simulated by a burner, and in the ideal environment, the switching action and switching frequency of the opening and closing test valve are tested to achieve the purpose of testing the reliability of the vehicle exhaust auxiliary brake valve.

[0004] The above-mentioned prior art cannot meet the testing requirements when used for testing the electronically controlled exhaust brake valve. Specifically, in a series of tests based on the engine back pressure as a parameter, since the above-mentioned prior art does not have an engine, the engine back pressure cannot be obtained; in addition, since the above-mentioned prior art does not have an engine, the engine speed cannot be obtained; based on the above content, it is impossible to establish a test plan for the electronically controlled exhaust brake valve based on the engine back pressure and speed, thereby failing to perform better testing on the electronically controlled exhaust brake valve.

[0005] Therefore, how to provide a test tool that can establish a test plan for the electronically controlled exhaust brake valve based on the engine's back pressure and speed and realize the test of the electronically controlled exhaust brake valve has become a technical problem to be solved. Utility Model Content

[0006] In order to solve the technical problem in the prior art of how to provide a test tool that can establish a test plan for an electronically controlled exhaust brake valve based on the back pressure and speed of the engine and realize the testing of the electronically controlled exhaust brake valve, the utility model provides a test device for an electronically controlled exhaust brake valve.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] According to one aspect of the utility model, there is provided a test device for an electronically controlled exhaust brake valve, comprising a host computer, an engine burning fuel, a back pressure sensor assembly for testing the back pressure of the engine, and a speed sensor assembly for testing the speed of the engine;

[0009] The host computer is provided with a communication interface for electrically connecting to the electronically controlled exhaust brake valve, wherein a feedback signal of the electronically controlled exhaust brake valve is sent to the host computer via the communication interface;

[0010] The engine is provided with an exhaust pipe, and the back pressure sensor assembly is connected to the exhaust pipe;

[0011] The engine is provided with an output shaft, and the rotation speed sensor assembly is arranged at the output shaft;

[0012] The engine, the back pressure sensor assembly and the rotation speed sensor assembly are electrically connected to the host computer respectively.

[0013] Further, the back pressure sensor assembly includes a transition connecting pipe and a back pressure sensor;

[0014] The transition connecting pipe is detachably connected to the exhaust pipe, and the transition connecting pipe is provided with a first mounting through hole for mounting the back pressure sensor;

[0015] The back pressure sensor is arranged in the first mounting through hole;

[0016] The back pressure sensor is electrically connected to the host computer.

[0017] Furthermore, a first flange is provided at the end of the exhaust pipe, a second flange is provided at the head end of the transition connecting pipe, and the first flange and the second flange are connected by bolts.

[0018] Furthermore, the first mounting through hole is provided with an internal thread;

[0019] The back pressure sensor is provided with an external thread;

[0020] The external thread of the back pressure sensor forms a threaded connection with the internal thread of the first mounting through hole.

[0021] Furthermore, a first flange is provided at the end of the transition connecting pipe;

[0022] The first flange of the transition pipe is configured to coaxially contact the second flange of the electronically controlled exhaust brake valve, and the first flange and the second flange are connected by a clamp assembly.

[0023] Further, the rotation speed sensor assembly includes a rotation speed sensor, a positioning mechanism and a rotation mechanism;

[0024] The positioning mechanism has an inner cavity, and the rotating mechanism is rotatably arranged in the inner cavity, wherein the rotating mechanism is coaxially connected to the output shaft of the engine;

[0025] The positioning mechanism is provided with a second mounting through hole, and the rotation speed sensor is detachably arranged in the second mounting through hole, wherein the probe of the rotation speed sensor is inserted from the outside of the positioning mechanism into the inner cavity through the second mounting through hole, and the extension line of the axis line of the second mounting through hole intersects with the radial edge of the rotating mechanism;

[0026] The rotation speed sensor is electrically connected to the host computer.

[0027] Further, the positioning mechanism includes a support plate, a support sleeve and a bottom plate;

[0028] The second mounting through hole is arranged on the bottom plate;

[0029] The support plate has a plurality of first through holes disposed at the edge and a connecting through hole disposed at the center for insertion of the output shaft of the engine;

[0030] The support sleeve has a plurality of second through holes arranged at the edge and the inner cavity arranged at the center;

[0031] The bottom plate has a plurality of third through holes arranged at the edge and a positioning through hole arranged at the center;

[0032] The number of the first through holes, the number of the second through holes and the number of the third through holes are the same, and the connecting through hole is coaxially arranged with the positioning through hole, wherein a bolt penetrates one of the first through holes, one of the second through holes and one of the third through holes respectively, and the bolt is connected to the threaded hole of the engine.

[0033] Furthermore, the rotation speed sensor is specifically a rotation speed sensor having an induction coil;

[0034] The rotating mechanism includes a coupling, a rotating seat, a gear plate and a bearing;

[0035] The two ends of the axis of the rotating seat are respectively a head end and a tail end, and a mounting plate is provided on the rotating seat between the head end and the tail end;

[0036] The head end is connected to the output shaft of the engine through the coupling;

[0037] The tail end is coaxially provided with the bearing, and the bearing is arranged in the positioning through hole;

[0038] The toothed disc has a first surface and a second surface, the first surface is configured to face the positioning through hole, a plurality of racks are arranged on the first surface, any one of the racks extends from the center of the toothed disc to the edge of the toothed disc, and the angles between two adjacent racks are the same, a mounting hole is arranged at the center of the toothed disc, the toothed disc is mounted on the rotating seat through the mounting hole, and the toothed disc is detachably connected to the mounting disc.

[0039] Furthermore, the host computer also includes a controller, a display and a memory;

[0040] The memory stores a preset program, the preset program has an input-output interface, wherein the input-output interface is displayed by a display, and the input-output interface is provided with a plurality of input modules;

[0041] The memory and the display screen are electrically connected to the controller respectively.

[0042] The above technical solution has the following advantages or beneficial effects:

[0043] The test device for the electronically controlled exhaust brake valve provided by the utility model can obtain the back pressure of the engine by arranging the back pressure sensor assembly, and can obtain the rotation speed of the output shaft of the engine by arranging the rotation speed sensor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 An electrical connection diagram of a test device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model;

[0045] Figure 2 A schematic diagram of a portion of the structure of a testing device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model;

[0046] Figure 3 A schematic structural diagram of a clamp assembly of a test device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model;

[0047] Figure 4 A schematic diagram of a portion of the structure of a testing device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model;

[0048] Figure 5 An electrical connection diagram of a test device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model;

[0049] Figure 6 A test curve diagram A of a test device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model;

[0050] Figure 7A test curve diagram B of a test device for an electronically controlled exhaust brake valve provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0051] Embodiment 1:

[0052] In this embodiment, see Figure 1 , Figure 2 or Figure 4 , a test device for an electronically controlled exhaust brake valve is provided, comprising a host computer 1, an engine 2 burning fuel, a back pressure sensor assembly 3 for testing the back pressure of the engine 2, and a speed sensor assembly 4 for testing the speed of the engine 2;

[0053] The host computer 1 is provided with a communication interface 101 for electrically connecting to the electronically controlled exhaust brake valve 5, wherein the feedback signal of the electronically controlled exhaust brake valve 5 is sent to the host computer 1 through the communication interface 101;

[0054] The engine 2 is provided with an exhaust pipe 201, and the back pressure sensor assembly 3 is connected to the exhaust pipe 201;

[0055] The engine 2 is provided with an output shaft 202, and the speed sensor assembly 4 is provided at the output shaft 202;

[0056] The engine 2 , the back pressure sensor assembly 3 and the rotation speed sensor assembly 4 are electrically connected to the host computer 1 respectively.

[0057] The electrically controlled exhaust brake valve 5 is an independent device, which itself is not included in the testing device for the electrically controlled exhaust brake valve 5 (hereinafter referred to as the testing device) of the present embodiment.

[0058] See also Figure 1 The electronically controlled exhaust brake valve 5 comprises an ECU 510, a motor 520, a connecting rod assembly 530 and an exhaust valve plate 540; wherein the ECU 510 comprises a pre-driver chip 511, and the pre-driver chip 511 is used to drive the motor 520 to rotate according to a set angle; wherein the motor 520 is provided with a Hall element 521, which is used to detect the rotation angle of the output shaft 202 of the motor 520; wherein the exhaust valve plate 540 comprises an angle sensor 541, which is used to detect the rotation angle of the exhaust valve plate 540.

[0059] When the electronically controlled exhaust brake valve 5 is arranged on the test device of the present embodiment, the host computer 1 is connected to the ECU 510 of the electronically controlled exhaust brake valve 5 through the communication interface 101, so that the host computer 1 can send control instructions and / or control parameters to the ECU 510 of the electronically controlled exhaust brake valve 5, and vice versa, the ECU 510 of the electronically controlled exhaust brake valve 5 can send the feedback signal of the Hall element 521 and the feedback signal of the angle sensor 541 to the host computer 1 through the communication interface 101, so that the electronically controlled exhaust brake valve 5, the host computer 1, the engine 2, the back pressure sensor assembly 3 and the speed sensor assembly 4 form a closed-loop test system.

[0060] Specifically, the exhaust gas discharged from the exhaust pipe 201 of the engine 2 can act on the exhaust valve plate 540 of the electronically controlled exhaust brake valve 5 (see Figure 2 ), the current angle of the exhaust valve plate 540 is fed back to ECU510 through the angle sensor 541, and ECU510 sends the current angle of the exhaust valve plate 540 to the host computer 1 through the communication interface 101, and the host computer 1 controls the speed of the engine 2 according to the received current angle of the exhaust valve plate 540, and the speed of the engine 2 is obtained through the speed sensor component 4, and the speed sensor component 4 feeds back the speed of the engine 2 to the host computer 1; in addition, the pressure between the exhaust pipe 201 of the engine 2 and the exhaust valve plate 540 of the electronically controlled exhaust brake valve 5 is the back pressure of the engine 2, and the back pressure of the engine 2 is obtained through the back pressure sensor component 3, and the back pressure of the engine 2 is fed back to the host computer 1.

[0061] When the test device in this embodiment is actually used to test the electronically controlled exhaust brake valve 5, the electronically controlled exhaust brake valve 5 is tested according to at least the following two test schemes:

[0062] Test plan 1: back pressure test at a specified valve angle;

[0063] Test plan 2: Set the back pressure value and test the back pressure establishment capability.

[0064] Based on the test scheme 1, the upper computer 1 outputs a speed command to the engine 2, so that the speed of the engine 2 is limited to run according to the speed command of the upper computer 1. For example, if the speed command output by the upper computer 1 to the engine 2 is 1000rpm, at this time, the real-time speed of the output shaft 202 of the engine 2 can be measured by the speed sensor component 4, and the real-time speed of the output shaft 202 can be fed back to the upper computer 1;

[0065] At the same time, a valve plate angle instruction is sent to the ECU510 of the electronically controlled exhaust brake valve 5 through the host computer 1, and the ECU510 makes the exhaust valve plate 540 of the electronically controlled exhaust brake valve 5 rotate according to the valve plate angle instruction of the host computer 1 through the pre-driver chip 511. For example, if the valve plate angle instruction sent by the host computer 1 to the ECU510 is zero degrees, then the ECU510 drives the motor 520 to rotate at zero degrees through the pre-driver chip 511, and then the motor 520 drives the connecting rod assembly 530, so that the connecting rod assembly 530 drives the exhaust valve plate 540 to rotate, and obtains the real-time angle of the exhaust valve plate 540 through the angle sensor 541, and feeds back the real-time angle of the exhaust valve plate 540 to the host computer 1;

[0066] When the engine 2 rotates according to the speed command, the engine 2 burns fuel (including but not limited to gasoline and diesel) and discharges exhaust gas, and the exhaust gas flows toward the exhaust valve plate 540 of the electronically controlled exhaust brake valve 5 through the exhaust pipe 201 of the engine 2. Specifically, the exhaust gas flows into the valve cavity where the exhaust valve plate 540 is located, and the air pressure of the exhaust gas acts on the exhaust valve plate 540, thereby forming a back pressure of the engine 2 between the exhaust pipe 201 of the engine 2 and the valve plate, and the back pressure of the engine 2 is detected by the back pressure sensor assembly 3, and the detected back pressure of the engine 2 is fed back to the host computer 1;

[0067] Furthermore, the Hall element 521 of the motor 520 of the electronically controlled exhaust brake valve 5 feeds back the detected real-time angle of the motor 520 to the host computer 1 through the ECU 510 and the communication interface 101;

[0068] The host computer 1 uses the real-time speed of the output shaft 202 of the engine 2, the real-time angle of the exhaust valve plate 540, the back pressure of the engine 2 and the real-time angle of the motor 520 as detection parameters, and calculates the detection parameters according to the preset program run by the host computer 1, thereby obtaining a test curve A based on the detection parameters (see Figure 6 , Figure 6 In the figure, S1 represents the output shaft speed of the engine, S2 represents the rotation angle of the motor, S3 represents the rotation angle of the exhaust valve plate, and S4 represents the back pressure of the engine). In the following content, the host computer 1 includes a display, and the test curve A is displayed on the display for the convenience of the staff to refer to.

[0069] The host computer 1 tests the electronically controlled exhaust brake valve 5 according to the detection parameters, and the fluctuation of the detection parameters or the formed curve is regarded as a part of the detection result.

[0070] Based on the second test scheme, the upper computer 1 outputs a speed command to the engine 2, so that the speed of the engine 2 is limited to run according to the speed command of the upper computer 1. For example, if the speed command output by the upper computer 1 to the engine 2 is 1500rpm, at this time, the actual speed of the output shaft 202 of the engine 2 can be measured by the speed sensor component 4, and the actual speed of the output shaft 202 can be fed back to the upper computer 1;

[0071] At the same time, the upper computer 1 sends a back pressure instruction of the engine 2 to the ECU 510 of the electronically controlled exhaust brake valve 5. Correspondingly, the ECU 510 generates a driving instruction according to the control program and parameter list of its own operation. The driving instruction is executed by the pre-driver chip 511, so that the motor 520 rotates according to the preset angle in the parameter list of the ECU 510 operation, and the motor 520 drives the connecting rod assembly 530, and the connecting rod assembly 530 drives the exhaust valve plate 540 to rotate, so that the exhaust valve plate 540 rotates according to the preset angle, and obtains the implementation angle of the exhaust valve plate 540 through the angle sensor 541, and the implementation angle of the exhaust valve plate 540 is fed back to the upper computer 1;

[0072] In the process of the engine 2 rotating according to the speed command, the engine 2 burns fuel (including but not limited to gasoline and diesel) and discharges exhaust gas, and the exhaust gas flows toward the exhaust valve plate 540 of the electronically controlled exhaust brake valve 5 through the exhaust pipe 201 of the engine 2. Specifically, the exhaust gas flows into the valve cavity where the exhaust valve plate 540 is located, and the air pressure of the exhaust gas acts on the exhaust valve plate 540, thereby forming a back pressure of the engine 2 between the exhaust pipe 201 of the engine 2 and the valve plate. The back pressure of the engine 2 is detected by the back pressure sensor assembly 3, and the detected back pressure of the engine 2 is fed back to the upper computer 1; and the upper computer 1 feeds back the detected back pressure of the engine 2 in real time. To the ECU510 of the electronically controlled exhaust brake valve 5, when the back pressure of the engine 2 does not meet the back pressure instruction, the ECU510 continues to drive the motor 520 to rotate through the pre-driver chip 511, so that the motor 520 drives the exhaust valve plate 540 to rotate through the connecting rod assembly 530, and then the angle of the exhaust valve plate 540 gradually increases, until the back pressure of the engine 2 meets the back pressure instruction, the ECU510 stops driving the motor 520 to rotate through the pre-driver chip 511, so that the exhaust valve plate 540 stops and maintains the current angle, which is the real-time angle, and the current angle of the exhaust valve plate 540 is fed back to the ECU510 and the host computer 1 through the angle sensor 541;

[0073] Furthermore, the Hall element 521 of the motor 520 of the electronically controlled exhaust brake valve 5 feeds back the detected real-time angle of the motor 520 to the ECU 510 and the host computer 1;

[0074] The host computer 1 uses the real-time speed of the output shaft 202 of the engine 2, the real-time angle of the exhaust valve plate 540, the back pressure of the engine 2 and the real-time angle of the motor 520 as detection parameters, and calculates the detection parameters according to the preset program run by the host computer 1, thereby obtaining a test curve B based on the detection parameters (see Figure 7 , Figure 7 In the figure, S1 represents the output shaft speed of the engine, S2 represents the back pressure of the engine, S3 represents the rotation angle of the motor, and S4 represents the rotation angle of the exhaust valve plate. In the following content, the host computer 1 includes a display, and the test curve graph B is displayed on the display for reference by the staff.

[0075] The host computer 1 tests the electronically controlled exhaust brake valve 5 according to the detection parameters, and the fluctuation of the detection parameters or the formed curve is regarded as a part of the detection result.

[0076] In the prior art (performance testing equipment for vehicle exhaust auxiliary brake valve, application number 201720109464.5), during a series of tests based on the engine back pressure as a parameter, since the prior art does not have an engine, the engine back pressure cannot be obtained; in addition, since the prior art does not have an engine, the engine speed cannot be obtained.

[0077] In this embodiment, by providing a back pressure sensor assembly 3, the back pressure of the engine 2 can be obtained, and by providing a rotation speed sensor assembly 4, the rotation speed of the output shaft 202 of the engine 2 can be obtained.

[0078] Therefore, the testing device for the electronically controlled exhaust brake valve 5 provided in this embodiment solves the technical problem of how to provide a testing tool that can establish a testing scheme for the electronically controlled exhaust brake valve 5 based on the back pressure and speed of the engine 2, and realize the testing work on the electronically controlled exhaust brake valve 5.

[0079] Further, in this embodiment, see Figure 2 , the back pressure sensor assembly 3 includes a transition connection pipe 301 and a back pressure sensor 302;

[0080] The transition connecting pipe 301 is detachably connected to the exhaust pipe 201 , and the transition connecting pipe 301 is provided with a first mounting through hole 303 for mounting a back pressure sensor 302 ;

[0081] The back pressure sensor 302 is disposed in the first mounting through hole 303;

[0082] The back pressure sensor 302 is electrically connected to the host computer 1 .

[0083] The transition connecting pipe 301 is used to provide an installation basis for the back pressure sensor 302. The transition connecting pipe 301 is connected to the exhaust pipe 201 of the engine 2. The lumen of the transition connecting pipe 301 is communicated with the lumen of the exhaust pipe 201, so that the exhaust gas discharged from the engine 2 can be discharged from the exhaust pipe 201 into the lumen of the transition connecting pipe 301.

[0084] The transition connecting pipe 301 is provided with a first mounting through hole 303, and the first mounting through hole 303 is communicated with the tube cavity of the transition connecting pipe 301. Therefore, when the back pressure sensor 302 is arranged in the first mounting through hole 303, the air pressure of the exhaust gas in the tube cavity of the transition connecting pipe 301 can act on the back pressure sensor 302 through the first mounting through hole 303, thereby realizing the function of the back pressure sensor 302 to detect the back pressure of the engine 2.

[0085] It should be understood that the structure of the back pressure sensor 302 is common knowledge known to those skilled in the art; the back pressure sensor 302 in the prior art (201320891276.4) can be applied to the test device of this embodiment.

[0086] It should be understood that based on the flange connection between the transition pipe 301 and the exhaust pipe 201, a high temperature resistant gasket should be provided between the flange of the transition pipe 301 and the flange of the exhaust pipe 201. The high temperature resistant gasket includes but is not limited to a graphite gasket.

[0087] In order to realize the connection between the transition connecting pipe 301 and the exhaust pipe 201 of the engine 2, preferably, see Figure 2 A first flange 203 is disposed at the end of the exhaust pipe 201, a second flange 304 is disposed at the head end of the transition connecting pipe 301, and the first flange 203 and the second flange 304 are connected by bolts.

[0088] The flange connection method can facilitate the installation and removal of the transition connecting pipe 301 and the exhaust pipe 201, and the economic cost of the flange connection is relatively low, and it is easy to manufacture and use.

[0089] In order to realize the connection between the back pressure sensor 302 and the first mounting through hole 303, preferably, the first mounting through hole 303 is provided with an internal thread;

[0090] The back pressure sensor 302 is provided with an external thread;

[0091] The external thread of the back pressure sensor 302 is threadedly connected with the internal thread of the first mounting through hole 303 .

[0092] The back pressure sensor 302 and the first mounting through hole 303 are connected by threads, and the connection structure is simple, easy to install and disassemble, and is conducive to improving the efficiency of replacing the back pressure sensor 302.

[0093] Furthermore, in order to realize the exhaust gas passing into the valve cavity of the electronically controlled exhaust brake valve 5, the electronically controlled exhaust brake valve 5 and the transition connecting pipe 301 are arranged as follows:

[0094] See also Figure 2 , a first flange 305 is provided at the end of the transition connecting pipe 301;

[0095] The first flange 305 of the transition connection pipe 301 is configured to coaxially contact the second flange 550 of the electronically controlled exhaust brake valve 5 , and the first flange 305 and the second flange 550 are connected via a clamp assembly 560 .

[0096] The second flange 550 is a part of the structure of the electric-controlled exhaust brake valve 5. Since the electric-controlled exhaust brake valve 5 has various models, the sizes of the second flange 550 of the electric-controlled exhaust brake valves 5 of different models are different.

[0097] Therefore, the aforementioned transition connecting pipe 301 can be configured into multiple models. In each model, the size of the second flange 304 at the head end of the transition connecting pipe 301 matches the size of the first flange 203 of the exhaust pipe 201 of the engine 2, and the size of the first flange 305 at the end of the transition connecting pipe 301 matches the size of the second flange 550 of one model of the electrically-controlled exhaust brake valve 5. Furthermore, when different models of electrically-controlled exhaust brake valves 5 are tested by the testing device of this embodiment, the corresponding transition connecting pipe 301 can be selected according to the specific model of the electrically-controlled exhaust brake valve 5 being tested, so as to realize the connection and communication among the exhaust pipe 201 of the engine 2, the transition connecting pipe 301 and the electrically-controlled exhaust brake valve 5 being tested.

[0098] In addition, based on the first flange 305 of the transition connecting pipe 301 and the second flange 550 of the electric control exhaust brake valve 5, a clamp assembly 560 (see Figure 2 or Figure 3 ) Connecting the first flange 305 and the second flange 550 is the best connection method; the specific structure of the clamp assembly 560 is common knowledge known to those skilled in the art and will not be repeated here.

[0099] Further, in this embodiment, see Figure 4 , the speed sensor assembly 4 includes a speed sensor 401, a positioning mechanism and a rotating mechanism;

[0100] The positioning mechanism has an inner cavity 409, and the rotating mechanism is rotatably arranged in the inner cavity 409, wherein the rotating mechanism is coaxially connected to the output shaft 202 of the engine 2;

[0101] The positioning mechanism is provided with a second mounting through hole 402, and the rotation speed sensor 401 is detachably arranged in the second mounting through hole 402, wherein the probe of the rotation speed sensor 401 is inserted from the outside of the positioning mechanism into the inner cavity 409 through the second mounting through hole 402, and the extension line of the axis line of the second mounting through hole 402 intersects with the radial edge of the rotating mechanism;

[0102] The rotation speed sensor 401 is electrically connected to the host computer 1 .

[0103] Among them, the structure of the positioning mechanism can be set to a variety of structures, including a frame structure, a cylindrical structure, a cover structure, etc.; the positioning mechanism has an inner cavity 409, and the structure of the inner cavity 409 at least satisfies the requirement of being able to accommodate the rotating mechanism and allow the rotating mechanism to rotate in the inner cavity 409; the positioning mechanism and the engine 2 are configured to be detachably connected to facilitate maintenance of the engine 2 and / or the positioning mechanism.

[0104] The rotating mechanism cooperates with the speed sensor 401 to jointly test the speed of the output shaft 202 of the engine 2; the detection principle of the speed sensor 401 is common knowledge known to those skilled in the art and will not be described in detail here;

[0105] The aforementioned positioning mechanism actually provides a fixed position for the speed sensor 401 relative to the output shaft 202 of the engine 2, and the second mounting through hole 402 of the positioning mechanism is used to fix the speed sensor 401;

[0106] In this embodiment, the actual detection object of the speed sensor 401 is the rotating mechanism coaxially connected to the output shaft 202 of the engine 2, and the target detection object of the speed sensor 401 is the output shaft 202 of the engine 2; in other words, the rotating mechanism is used to provide an installation position and installation space for the speed sensor 401 detection, including the installation position and installation space increased by the rotating mechanism along the axial direction and radial direction of the output shaft 202 of the engine 2, so that the position of the speed sensor 401 relative to the output shaft 202 of the engine 2 can be set more flexibly;

[0107] The output shaft 202 of the engine 2 is coaxially connected to the rotating mechanism, resulting in the angular velocity of the output shaft 202 being the same as the angular velocity of the rotating mechanism. Therefore, when the speed sensor 401 detects the angular velocity of the rotating mechanism, it actually detects the angular velocity of the output shaft 202 of the engine 2, and then the angular velocity of the output shaft 202 of the engine 2 can be converted into the rotational speed of the output shaft 202 of the engine 2. This is common knowledge known to those skilled in the art.

[0108] The test device for the electronically controlled exhaust brake valve 5 provided in this embodiment is preferably as shown in Figure 4 , the positioning mechanism includes a support plate 403, a support sleeve 404 and a bottom plate 405;

[0109] The second mounting through hole 402 is provided on the bottom plate 405;

[0110] The support plate 403 has a plurality of first through holes 406 disposed at the edge and a connecting through hole 407 disposed at the center for the output shaft 202 of the engine 2 to be inserted;

[0111] The support sleeve 404 has a plurality of second through holes 408 disposed at the edge and an inner cavity 409 disposed at the center;

[0112] The bottom plate 405 has a plurality of third through holes 410 disposed at the edge and a positioning through hole 411 disposed at the center;

[0113] The number of the first through holes 406, the number of the second through holes 408 and the number of the third through holes 410 are the same, and the connecting through hole 407 is coaxially arranged with the positioning through hole 411, wherein a bolt penetrates one of the first through holes 406, one of the second through holes 408 and one of the third through holes 410 respectively, and the bolt is connected to the threaded hole of the engine 2.

[0114] Among them, the support plate 403, the support sleeve 404 and the base plate 405 are fixed to the engine 2 by bolts. Specifically, threaded holes for connecting threads are provided on the surface of the engine 2 (the number of threaded holes can be 3 or 4), and the number of bolts, the number of first through holes 406, the number of second through holes 408 and the number of third through holes 410 are respectively configured to be the same as the number of threaded holes. After any bolt penetrates one of the first through holes 406, one of the second through holes 408 and one of the third through holes 410 respectively, and then the bolt is connected to the threaded hole of the engine 2, the support part, the support sleeve 404 and the base plate 405 can be fixed to the engine 2.

[0115] The aforementioned rotating mechanism is arranged in the inner cavity 409 of the support sleeve 404, and the rotating mechanism is located between the support plate 403 and the bottom plate 405, and the rotating mechanism is configured in the inner cavity 409 of the support sleeve 404 to be rotatable relative to the support sleeve 404; through the connecting through hole 407 on the support plate 403, the output shaft 202 of the engine 2 is inserted into the inner cavity 409 of the support sleeve 404, so as to facilitate the connection between the output shaft 202 of the engine 2 and the rotating mechanism in the inner cavity 409 of the support sleeve 404; through the positioning through hole 411 of the bottom plate 405, the other end of the rotating mechanism (except the other end connected to the output shaft 202 of the engine 2) can be positioned through the positioning through hole 411, so that the rotating mechanism keeps the axis centerline stable during the rotation process in the support sleeve 404.

[0116] When actually assembling the positioning mechanism and the rotating mechanism in this embodiment, the support plate 403 is first sleeved on the output shaft 202 of the engine 2, so that the output shaft 202 of the engine 2 penetrates the connecting through hole 407 of the support plate 403, and then, the rotating mechanism is connected to the output shaft 202 of the engine 2. At this time, the support plate 403 is located between the engine 2 and the rotating mechanism; then, the support sleeve 404 is sleeved on the rotating mechanism, and the bottom plate 405 is covered on the support sleeve 404, so that the other end of the rotating mechanism is set in the positioning through hole 411 of the bottom plate 405; finally, bolts are used to penetrate the first through hole 406, the second through hole 408 and the third through hole 410 respectively, and connected to the threaded hole of the engine 2 to realize the assembly of the positioning mechanism and the rotating mechanism.

[0117] Further, the test device for the electronically controlled exhaust brake valve 5 of this embodiment is preferably, see Figure 4 , the speed sensor 401 is specifically a speed sensor 401 having an induction coil;

[0118] The rotating mechanism includes a coupling 412, a rotating seat 413, a gear plate 414 and a bearing 415;

[0119] The two ends of the axis of the rotating seat 413 are the head end and the tail end respectively, and a mounting plate 416 is provided on the rotating seat 413 between the head end and the tail end;

[0120] The head end is connected to the output shaft 202 of the engine 2 through a coupling 412;

[0121] A bearing 415 is coaxially arranged at the tail end, and the bearing 415 is arranged in the positioning through hole 411;

[0122] The toothed disc 414 has a first surface and a second surface, the first surface is configured to face the positioning through hole 411, and a plurality of racks are arranged on the first surface, and any rack extends from the center of the toothed disc 414 to the edge of the toothed disc 414, and the angles between two adjacent racks are the same. A mounting hole 417 is arranged at the center of the toothed disc 414, and the toothed disc 414 is mounted on the rotating seat 413 through the mounting hole 417, and the toothed disc 414 is detachably connected to the mounting disc 416.

[0123] Among them, the speed sensor 401 with an induction coil generates a magnetic field after being energized, and the magnetic field of the induction coil is disturbed by the rotation of the gear disc 414, causing the magnetic field of the induction coil to change, and then causing the current value of the output current of the induction coil to change, thereby achieving a test effect of obtaining the speed of the output shaft 202 of the engine 2 through the speed sensor 401 with an induction coil and the gear disc 414.

[0124] The rotation speed sensor 401 with an induction coil is used in conjunction with the gear plate 414 because the rotation speed sensor 401 with an induction coil has low economic cost, meets the test accuracy and is reliable to use, and can reduce the test cost of the electronically controlled exhaust brake valve 5 .

[0125] A speed sensor 401 with an induction coil is arranged in the aforementioned second mounting hole 402, wherein the induction coil of the speed sensor 401 penetrates the second mounting hole 402 and reaches the supporting sleeve 404, so that the induction coil and the gear plate 414 maintain a preset distance; the speed sensor 401 and the second mounting hole 402 are fixed by a clamping ring 418 and a bushing 419 to achieve a detachable connection between the speed sensor 401 and the second mounting hole 402, wherein the bushing 419 is located between the speed sensor 401 and the inner wall of the second mounting hole 402, and is used to reduce the friction between the speed sensor 401 and the base plate 405, and the number of the clamping rings 418 is two, and the two clamping rings 418 are respectively engaged in the clamping grooves of the speed sensor 401 located at both ends of the bushing 419 to prevent the bushing 419 from moving relative to the speed sensor 401.

[0126] In the process of actually assembling the positioning mechanism and the rotating mechanism of this embodiment, the rotating seat 413, the toothed disc 414 and the bearing 415 are first assembled into an intermediate component; after the aforementioned support plate 403 is sleeved on the output shaft 202 of the engine 2, the output shaft 202 of the engine 2 penetrates the connecting through hole 407 of the support plate 403, and the head end of the rotating seat 413 of the intermediate component is connected to the output shaft 202 of the engine 2 through the coupling 412; then, the support sleeve 404 is sleeved on the intermediate component, and the bottom plate 405 is covered on the support sleeve 404, wherein the bearing 415 of the intermediate component is arranged in the positioning through hole 411 of the bottom plate 405; then, the support plate 403, the support sleeve 404 and the bottom plate 405 of the positioning mechanism are fixed by bolts; finally, the combined structure of the speed sensor 401, the retaining ring 418 and the bushing 419 is arranged in the second mounting through hole 402 of the bottom plate 405.

[0127] It should be understood that the mounting plate 416 and the toothed plate 414 are connected in a detachable manner, including but not limited to bolt connection, locating pin connection, snap ring and spline connection, etc.

[0128] It should be understood that a threaded connection can be used between the bushing 419 and the base plate 405. Specifically, the bushing 419 is provided with an external thread, and the inner wall of the second mounting hole 402 is provided with an internal thread. The external thread of the bushing 419 can be connected to the internal thread of the second mounting hole 402.

[0129] For further information, see Figure 5, the test device for the electronically controlled exhaust brake valve 5 of this embodiment, the host computer 1 also includes a controller 102, a display 103 and a memory 104;

[0130] The memory 104 stores a preset program, which has an input-output interface, wherein the input-output interface is displayed by the display 103, and the input-output interface is provided with a plurality of input modules;

[0131] The memory 104 and the display screen 103 are electrically connected to the controller 102 respectively.

[0132] The memory 104 stores a preset program, and the controller 102 is used to execute the preset program in the memory 104, and use the feedback data of the rotation speed sensor 401 and the feedback data of the back pressure sensor 302 as parameters to perform calculations according to the preset program;

[0133] The preset program includes an input-output interface for displaying the aforementioned test mode 1 and test mode 2, the input-output interface having a plurality of input modules, one of which is used to input a set back pressure value, and another of which is used to input a set speed value;

[0134] When the controller 102 executes the preset program, the input and output interface is displayed on the display 103 to facilitate the management and operation of the staff.

[0135] The host computer 1 is specifically an industrial computer, which is implemented in conjunction with configuration software, which includes but is not limited to wincc; the industrial computer has a hard disk (memory 104) for storing preset programs; the industrial computer can be configured with a variety of board interfaces, which can be used to connect to the ECU510 of the electronically controlled exhaust brake valve 5; the display 103 of the industrial computer is used to display the screen (input and output interface) of the configuration software, which is common knowledge known to those skilled in the art; the screen of the configuration software can be set with an input module for setting parameters, which is common knowledge known to those skilled in the art.

[0136] It should be understood that, in other embodiments, the host computer 1 may also be a control system based on a PLC or a single-chip microcomputer. It is common knowledge known to those skilled in the art that a PLC or a single-chip microcomputer can form a control system.

[0137] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A test device for an electronically controlled exhaust brake valve, characterized in that: It includes a host computer, an engine burning fuel, a back pressure sensor assembly for testing the back pressure of the engine, and a speed sensor assembly for testing the speed of the engine; The host computer is provided with a communication interface for electrically connecting to the electronically controlled exhaust brake valve, wherein a feedback signal of the electronically controlled exhaust brake valve is sent to the host computer via the communication interface; The engine is provided with an exhaust pipe, and the back pressure sensor assembly is connected to the exhaust pipe; The engine is provided with an output shaft, and the rotation speed sensor assembly is arranged at the output shaft; The engine, the back pressure sensor assembly and the rotation speed sensor assembly are electrically connected to the host computer respectively.

2. The testing device for the electronically controlled exhaust brake valve according to claim 1, characterized in that: The back pressure sensor assembly includes a transition connecting pipe and a back pressure sensor; The transition connecting pipe is detachably connected to the exhaust pipe, and the transition connecting pipe is provided with a first mounting through hole for mounting the back pressure sensor; The back pressure sensor is arranged in the first mounting through hole; The back pressure sensor is electrically connected to the host computer.

3. The testing device for the electronically controlled exhaust brake valve according to claim 2, characterized in that: The end of the exhaust pipe is provided with a first flange, the head end of the transition connecting pipe is provided with a second flange, and the first flange and the second flange are connected by bolts.

4. The testing device for the electronically controlled exhaust brake valve according to claim 2, characterized in that: The first mounting through hole is provided with an internal thread; The back pressure sensor is provided with an external thread; The external thread of the back pressure sensor forms a threaded connection with the internal thread of the first mounting through hole.

5. The testing device for the electronically controlled exhaust brake valve according to claim 2, characterized in that: A first flange is provided at the end of the transition connecting pipe; The first flange of the transition pipe is configured to coaxially contact the second flange of the electronically controlled exhaust brake valve, and the first flange and the second flange are connected by a clamp assembly.

6. The testing device for the electronically controlled exhaust brake valve according to claim 1, characterized in that: The speed sensor assembly includes a speed sensor, a positioning mechanism and a rotating mechanism; The positioning mechanism has an inner cavity, and the rotating mechanism is rotatably arranged in the inner cavity, wherein the rotating mechanism is coaxially connected to the output shaft of the engine; The positioning mechanism is provided with a second mounting through hole, and the rotation speed sensor is detachably arranged in the second mounting through hole, wherein the probe of the rotation speed sensor is inserted from the outside of the positioning mechanism into the inner cavity through the second mounting through hole, and the extension line of the axis line of the second mounting through hole intersects with the radial edge of the rotating mechanism; The rotation speed sensor is electrically connected to the host computer.

7. The testing device for the electronically controlled exhaust brake valve according to claim 6, characterized in that: The positioning mechanism comprises a support plate, a support sleeve and a bottom plate; The second mounting through hole is arranged on the bottom plate; The support plate has a plurality of first through holes disposed at the edge and a connecting through hole disposed at the center for insertion of the output shaft of the engine; The support sleeve has a plurality of second through holes arranged at the edge and the inner cavity arranged at the center; The bottom plate has a plurality of third through holes arranged at the edge and a positioning through hole arranged at the center; The number of the first through holes, the number of the second through holes and the number of the third through holes are the same, and the connecting through hole is coaxially arranged with the positioning through hole, wherein a bolt penetrates one of the first through holes, one of the second through holes and one of the third through holes respectively, and the bolt is connected to the threaded hole of the engine.

8. The testing device for the electronically controlled exhaust brake valve according to claim 7, characterized in that: The rotation speed sensor is specifically a rotation speed sensor having an induction coil; The rotating mechanism includes a coupling, a rotating seat, a gear plate and a bearing; The two ends of the axis of the rotating seat are respectively a head end and a tail end, and a mounting plate is provided on the rotating seat between the head end and the tail end; The head end is connected to the output shaft of the engine through the coupling; The tail end is coaxially provided with the bearing, and the bearing is arranged in the positioning through hole; The toothed disc has a first surface and a second surface, the first surface is configured to face the positioning through hole, a plurality of racks are arranged on the first surface, any one of the racks extends from the center of the toothed disc to the edge of the toothed disc, and the angles between two adjacent racks are the same, a mounting hole is arranged at the center of the toothed disc, the toothed disc is mounted on the rotating seat through the mounting hole, and the toothed disc is detachably connected to the mounting disc.

9. The testing device for the electronically controlled exhaust brake valve according to claim 1, characterized in that: The host computer also includes a controller, a display and a memory; The memory stores a preset program, the preset program has an input-output interface, wherein the input-output interface is displayed by a display, and the input-output interface is provided with a plurality of input modules; The memory and the display screen are electrically connected to the controller respectively.

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