Egr valve sticking simulation detection device

Abstract

The application discloses an EGR valve jam simulation detection device for simulating an EGR valve jam fault, wherein the EGR valve comprises an actuator and a valve body connected with each other, and the EGR valve jam simulation detection device comprises a first simulation mechanism and a second simulation mechanism. The first simulation mechanism is detachably fixedly connected with the actuator, and the first simulation mechanism comprises a fixed support, a fixed rod and a pressing sleeve. The bottom of the fixed support is detachably fixed on the end face of a push rod of the actuator. One end of the fixed rod is vertically buckled on the push rod of the actuator, and the other end of the fixed rod vertically penetrates through the top of the fixed support. The pressing sleeve is vertically sleeved on the fixed rod. The second simulation mechanism is detachably fixedly connected with the valve body, and the second simulation mechanism comprises a supporting plate, an adjusting bolt and a first locking nut. Therefore, the EGR valve jam simulation detection device is simple and reasonable in structure, the EGR valve is not damaged in the detection process, and the jam fault can be set in the stroke of the EGR valve.

Description

Technical Field

[0001] This invention relates to the field of EGR valve testing technology, and in particular to an EGR valve jamming simulation testing device. Background Technology

[0002] According to relevant national emission regulations, OBD function testing is conducted on the aftertreatment system of China VI engines. One of the tests is EGR valve sticking detection. In order to simulate the failure of EGR valve sticking, some companies weld the valve body and actuator moving parts of the EGR valve. The high temperature generated during the welding process damages the EGR valve, making it impossible to perform the test as required. Furthermore, the welding method can only fix the valve opening in one position, and cannot fix the EGR valve opening to any position within the sticking stroke.

[0003] The current practice of welding the EGR valve body to destroy the detection component is inaccurate and increases the cost of detection, and is no longer suitable for detecting EGR valve jamming.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an EGR valve jamming simulation detection device with a simple and reasonable structure, which does not damage the EGR valve during the detection process, and can set jamming faults within the EGR valve stroke.

[0006] To achieve the above objectives, the present invention provides an EGR valve jamming simulation detection device for simulating EGR valve jamming faults. The EGR valve includes an actuator and a valve body connected together. The EGR valve jamming simulation detection device includes: a first simulation mechanism and a second simulation mechanism. The first simulation mechanism is detachably fixedly connected to the actuator and includes a fixed bracket, a fixed rod, and a pressure sleeve. The bottom of the fixed bracket is detachably fixed to the valve body of the actuator. One end of the fixed rod is vertically fastened to the push rod of the actuator, and the other end of the fixed rod vertically passes through the top of the fixed bracket. The pressure sleeve is vertically sleeved on the fixed rod. The second simulation mechanism is detachably fixedly connected to the valve body and includes: a support plate, an adjusting bolt, and a first locking nut. The support plate is detachably fixed to the valve body. One end of the adjusting bolt passes through the support plate and abuts against the valve push rod inside the valve body. The first locking nut is screwed onto the other end of the adjusting bolt and is located above the top of the support plate.

[0007] In one or more embodiments, the first simulation mechanism further includes a clamping nut screwed onto the fixed rod and located above the pressure sleeve.

[0008] In one or more embodiments, the first simulation mechanism further includes a second locking nut screwed onto the fixing rod and located above the top of the fixing bracket.

[0009] In one or more embodiments, the first simulation mechanism further includes a third locking nut screwed onto the fixing rod and located below the top of the fixing bracket.

[0010] In one or more embodiments, the fixed bracket includes: a fixed plate and a bracket. The bottom of the fixed plate is detachably fixed to the push rod end face of the actuator, and the fixed plate has a first through hole in the middle; and the bracket is U-shaped, fixed to the top of the fixed plate, and the top of the bracket has a second through hole; wherein the other end of the fixed rod passes through the second through hole.

[0011] In one or more embodiments, the outer diameters of both the second locking nut and the third locking nut are larger than the diameter of the second through hole at the top of the bracket.

[0012] In one or more embodiments, one end of the fixing rod has a fastening assembly corresponding to and adapted to the push rod. The fastening assembly includes a fastening frame and two fastening pieces. The fastening frame is U-shaped, and its top is fixedly connected to one end of the fixing rod. The two fastening pieces are each semi-circular, arranged opposite to each other, with a distance between them, and the bottom ends of the fastening frame are fixedly connected to the two fastening pieces respectively.

[0013] In one or more embodiments, both ends of the pressure sleeve have grooves, and the two grooves are adapted to correspond to the fastening frame.

[0014] Compared with the prior art, the EGR valve jamming simulation detection device according to the present invention has a simple and reasonable structure, does not damage the EGR valve during the detection process, and can set jamming faults within the EGR valve stroke. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the first simulation mechanism according to an embodiment of the present invention.

[0016] Figure 2 This is an exploded structural diagram of the first simulation mechanism according to an embodiment of the present invention.

[0017] Figure 3This is a three-dimensional structural schematic diagram of the second simulation mechanism according to an embodiment of the present invention.

[0018] Figure 4 This is an exploded structural diagram of the second simulation mechanism according to an embodiment of the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of an EGR valve according to an embodiment of the present invention.

[0020] Figure 6 This is an exploded structural diagram of an EGR valve according to an embodiment of the present invention.

[0021] Figure 7 This is a three-dimensional structural diagram of a portion of the first simulation mechanism according to an embodiment of the present invention mounted on an actuator.

[0022] Figure 8 This is an exploded structural diagram of a portion of the first simulation mechanism according to an embodiment of the present invention mounted on an actuator.

[0023] Figure 9 This is a three-dimensional structural diagram of a first simulation mechanism mounted on an actuator according to an embodiment of the present invention.

[0024] Figure 10 This is an exploded structural diagram of the first simulation mechanism installed on the actuator according to an embodiment of the present invention.

[0025] Figure 11 This is a three-dimensional structural diagram of an actuator according to an embodiment of the present invention.

[0026] Figure 12 This is a cross-sectional view of the first simulation mechanism portion of the present invention mounted on the actuator, according to an embodiment of the present invention.

[0027] Figure 13 This is a three-dimensional structural diagram of a valve body according to an embodiment of the present invention.

[0028] Figure 14 This is an exploded structural diagram of a valve body according to an embodiment of the present invention.

[0029] Figure 15 This is a cross-sectional view of the second simulation mechanism installed on the valve body according to an embodiment of the present invention.

[0030] Figure 16 This is a three-dimensional structural diagram of a fixed bracket according to an embodiment of the present invention.

[0031] Figure 17 This is a three-dimensional structural diagram of a pressure sleeve according to an embodiment of the present invention.

[0032] Figure 18 This is a three-dimensional structural diagram of a fixing rod according to an embodiment of the present invention.

[0033] Figure 19 This is a three-dimensional structural diagram of a support plate according to an embodiment of the present invention.

[0034] Figure 20 This is a three-dimensional structural schematic diagram of an adjusting bolt according to an embodiment of the present invention.

[0035] Explanation of key figure labels:

[0036] 1-Actuator, 2-Valve body, 3-Fixed bracket, 4-Fixed rod, 5-Pressure sleeve, 6-Support plate, 7-Adjusting bolt, 8-First locking nut, 9-Pressure nut, 10-Second locking nut, 11-Third locking nut, 19-Push rod, 20-Actuator valve body, 21-Spring, 22-Valve push rod. Detailed Implementation

[0037] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0038] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0039] like Figures 1 to 20 As shown, an EGR valve jamming simulation detection device according to an embodiment of the present invention is used to simulate EGR valve jamming fault. The EGR valve includes an actuator 1 and a valve body 2 connected to each other. The EGR valve jamming simulation detection device includes: a first simulation mechanism and a second simulation mechanism. The first simulation mechanism is detachably fixedly connected to the actuator 1, and the first simulation mechanism includes a fixed bracket 3, a fixed rod 4, and a pressure sleeve 5; the bottom of the fixed bracket 3 is detachably fixed to the valve body 2 of the actuator 1; one end of the fixed rod 4 is vertically fastened to the push rod 19 of the actuator 1, and the other end of the fixed rod 4 vertically passes through the top of the fixed bracket 3; the pressure sleeve 5 is vertically sleeved on the fixed rod 4; the second simulation mechanism is detachably fixedly connected to the valve body 2, and the second simulation mechanism includes: a support plate 6, an adjusting bolt 7, and a first locking nut 8. The support plate 6 is detachably fixed to the valve body 2; one end of the adjusting bolt 7 passes through the support plate 6 and abuts against the valve push rod 22 inside the valve body 2; the first locking nut 8 is screwed onto the other end of the adjusting bolt 7 and is located above the top of the support plate 6.

[0040] In one or more embodiments, the first simulation mechanism further includes a clamping nut 9, screwed onto the fixing rod 4 and located above the pressure sleeve 5.

[0041] In one or more embodiments, the first simulation mechanism further includes a second locking nut 10, screwed onto the fixing rod 4 and located above the top of the fixing bracket 3.

[0042] In one or more embodiments, the first simulation mechanism further includes a third locking nut 11, screwed onto the fixing rod 4 and located below the top of the fixing bracket 3.

[0043] In one or more embodiments, the fixed bracket 3 includes: a fixed plate and a bracket. The bottom of the fixed plate is detachably fixed to the end face of the push rod 19 of the actuator 1, and the fixed plate has a first through hole in the middle; and the bracket is U-shaped, fixed to the top of the fixed plate, and the top of the bracket has a second through hole; wherein the other end of the fixed rod 4 passes through the second through hole.

[0044] In one or more embodiments, the outer diameters of the second locking nut 10 and the third locking nut 11 are both larger than the diameter of the second through hole at the top of the bracket.

[0045] In one or more embodiments, one end of the fixing rod 4 has a fastening assembly corresponding to and adapted to the push rod 19. The fastening assembly includes a fastening frame and two fastening pieces. The fastening frame is U-shaped, and its top is fixedly connected to one end of the fixing rod 4. The two fastening pieces are each semi-circular, arranged opposite to each other, with a distance between them, and the bottom ends of the fastening frame are fixedly connected to the two fastening pieces respectively.

[0046] In one or more embodiments, both ends of the pressure sleeve 5 have grooves, and the two grooves are adapted to correspond to the fastening frame.

[0047] In practical applications, the EGR valve jamming simulation detection device of the present invention consists of the following two components: a first simulation mechanism and a second simulation mechanism. The first simulation mechanism consists of a fixed bracket 3, a fixed rod 4, a pressure sleeve 5, a pressure nut 9, a second locking nut 10, and a third locking nut 11. The second simulation mechanism consists of a support plate 6, an adjusting bolt 7, and a first locking nut 8.

[0048] Specifically, the method for installing the first simulation mechanism on actuator 1 is as follows:

[0049] 1. Loosen the fixing bolts on the EGR valve and disassemble the EGR valve into two parts: actuator 1 and valve body 2 (e.g., Figure 5 and Figure 6 (as shown)

[0050] 2. Attach the fixing rod 4 to the push rod 19 of the actuator 1, then install the pressure sleeve 5 and tighten the pressure nut 9 to lock it in place, so that the push rod 19 of the actuator 1 and the fixing rod 4 form a single unit (e.g., Figure 7 and Figure 8 (as shown)

[0051] 3. Then, install the second locking nut 10, the fixing bracket 3, and the third locking nut 11 onto the fixing rod 4, assembling them into the first simulation mechanism (e.g., Figures 1 to 2 (as shown)

[0052] 4. Secure the first simulation mechanism to actuator 1 with bolts (e.g., Figure 9 and Figure 10 (as shown)

[0053] 5. Adjust the distance from actuator 1 to the mounting surface of actuator valve body 20 to L, and then tighten the second locking nut 10 and the third locking nut 11. Figures 11 to 12 (As shown).

[0054] Specifically, the installation method for the second simulation mechanism is as follows:

[0055] 1. Tighten the adjusting bolt 7 onto the support plate 6, and adjust the distance from the adjusting bolt 7 to the mounting surface of the support plate 6 to L. Assemble the second simulation mechanism (e.g., Figure 3 and Figure 4 (as shown)

[0056] 2. Secure the second simulation mechanism to valve body 2 with bolts. Figure 13 , Figure 14 and Figure 15 (as shown)

[0057] Specifically, the method for mounting the first and second simulation mechanisms on the engine is as follows:

[0058] 1. Remove the engine's EGR valve and disassemble it into two parts: actuator 1 and valve body 2;

[0059] 2. Install the first simulation mechanism on actuator 1A;

[0060] 3. The second locking nut 10 and the third locking nut 11 fix the fixing rod 4 to the fixing bracket 3. The fixing rod 4 and the push rod 19 of the actuator 1 are fixed and form a whole. Therefore, the push rod 19 of the actuator 1 is also fixed in one position, and the state is consistent with the jamming of the actuator 1 of the EGR valve.

[0061] 4. Install the second simulation mechanism onto valve body 2, and then install them together onto the engine;

[0062] 5. In valve body 2 and the second simulation mechanism, under the action of adjusting bolt 7 and spring 21 of valve body 2, valve push rod 22 of valve body 2 is fixed in one position, and its state is consistent with the stuck state of valve body 2 of EGR valve. Figure 15 (as shown)

[0063] 6. Then, perform the test according to the EGR valve sticking fault test method.

[0064] The EGR valve jamming simulation detection device of this invention does not simulate EGR valve jamming by damaging the EGR valve. Instead, it uses a simple disassembly and mechanical fixation method to simulate EGR valve jamming. In other words, it simulates EGR valve jamming without damaging the EGR valve, reducing damage to parts during testing and thus reducing testing costs. By adjusting the distance L of the EGR valve's moving parts, it simulates EGR valve jamming within various opening ranges, and the simulation range can be arbitrarily adjusted within the opening range. The connection point between the device and the EGR valve has the same structural shape as the corresponding internal structure of the EGR valve, without affecting the test. The positioning of the connection between the device and the EGR valve is consistent with the corresponding position and shape of the EGR valve, and the positioning is consistent with the original EGR valve.

[0065] In summary, the EGR valve jamming simulation detection device of the present invention has a simple and reasonable structure, does not damage the EGR valve during the detection process, and can set jamming faults within the EGR valve stroke.

[0066] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. An EGR valve jamming simulation and detection device for simulating EGR valve jamming faults, wherein the EGR valve includes an actuator and a valve body connected to each other, characterized in that, The EGR valve sticking simulation detection device includes: A first simulation mechanism is detachably and fixedly connected to the actuator, and the first simulation mechanism includes: A fixed bracket, the bottom of which is detachably fixed to the valve body of the actuator; A fixing rod, one end of which is vertically fastened to the push rod of the actuator, and the other end of which vertically passes through the top of the fixing bracket; A pressure sleeve is vertically fitted onto the fixed rod; A second simulation mechanism is detachably and fixedly connected to the valve body, and the second simulation mechanism includes: A support plate is detachably fixed to the valve body; An adjusting bolt, one end of which passes through the support plate and abuts against the valve push rod inside the valve body; The first locking nut is screwed onto the other end of the adjusting bolt and is located above the top of the support plate.

2. The EGR valve sticking simulation and detection device as described in claim 1, characterized in that, The first simulation mechanism also includes a clamping nut, which is screwed onto the fixed rod and located above the pressure sleeve.

3. The EGR valve sticking simulation and detection device as described in claim 2, characterized in that, The first simulation mechanism also includes a second locking nut, which is screwed onto the fixed rod and located above the top of the fixed bracket.

4. The EGR valve sticking simulation and detection device as described in claim 3, characterized in that, The first simulation mechanism also includes a third locking nut, which is screwed onto the fixed rod and located below the top of the fixed bracket.

5. The EGR valve sticking simulation and detection device as described in claim 4, characterized in that, The fixing bracket includes: A fixing plate, the bottom of which is detachably fixed to the push rod end face of the actuator, and the fixing plate having a first through hole in the middle; and The bracket is in the shape of a door and is fixed to the top of the fixing plate. A second through hole is provided on the top of the bracket. The other end of the fixing rod passes through the second through hole.

6. The EGR valve sticking simulation and detection device as described in claim 5, characterized in that, The outer diameters of both the second and third locking nuts are larger than the diameter of the second through hole at the top of the bracket.

7. The EGR valve sticking simulation and detection device as described in claim 1, characterized in that, One end of the fixing rod has a fastening assembly that is adapted to correspond with the push rod, the fastening assembly comprising: The fastening frame is U-shaped, and its top is fixedly connected to one end of the fixing rod; and Two fastening pieces are each semi-circular, and the two fastening pieces are arranged opposite each other with a distance between them. The bottom ends of the fastening frame are fixedly connected to the two fastening pieces respectively.

8. The EGR valve sticking simulation and detection device as described in claim 7, characterized in that, Both ends of the pressure sleeve have grooves, and the two grooves correspond to and are adapted to the fastening frame.

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