Electric control unit

Abstract

The utility model belongs to the technical field of engine systems, and particularly relates to an electric control unit. The electronic control unit comprises a circuit main board and a TVS tube, the TVS tube is electrically connected with the circuit main board, the TVS tube is detachably arranged on the circuit main board, the TVS tube is detached from the circuit main board through detachable connection of the TVS tube, when the TVS tube is overloaded and damaged, the TVS tube can be independently replaced and maintained, and the maintenance cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the engine system technical field, especially related to a kind of electronic control unit. BACKGROUND

[0002] Electronic Control Unit is widely used in automobile engine, and it is the core part of modern automobile engine management system, and Electronic Control Unit can monitor and adjust the working condition of engine by receiving information from various sensors, to ensure that engine can run with best performance under different conditions.

[0003] At present, Electronic Control Unit includes circuit mainboard and Transient Voltage Suppressor (TVS tube for short). During the working process of Electronic Control Unit, the abnormal change of current voltage caused by transient voltage fluctuation of power supply system, electromagnetic interference, switching action of electrical components, welding of vehicle parts, etc. will cause damage to Electronic Control Unit. TVS tube is a kind of semiconductor protection device, which is used to prevent transient overvoltage and current impact from damaging the circuit. The working principle is based on its ability to respond quickly and absorb overvoltage energy. TVS tube can quickly respond when detecting voltage exceeding the set value, and discharge excess energy to protect the circuit.

[0004] However, when the impact received by TVS tube exceeds its tolerance limit, TVS tube will also be overloaded and damaged. And the existing TVS tube is usually integrated in the circuit mainboard of Electronic Control Unit, which makes it impossible to replace TVS tube alone, and the maintenance cost is too high. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve one of the technical problems in the related art at least to some extent.

[0006] To achieve this purpose, the utility model provides an Electronic Control Unit, which comprises:

[0007] circuit mainboard; and

[0008] TVS tube, which is electrically connected with the circuit mainboard, and the TVS tube is detachably arranged on the circuit mainboard.

[0009] The Electronic Control Unit can detach the TVS tube from the circuit mainboard through the detachable connection of TVS tube, so that when the TVS tube is overloaded and damaged, it can be replaced and repaired alone, which is beneficial to reduce the maintenance cost.

[0010] As an optional solution, the TVS tube comprises:

[0011] first body; and

[0012] A pin is connected with the first body, and the pin is plugged with the circuit mainboard.

[0013] When the TVS tube is assembled, the operator can directly insert the pin of the TVS tube into the circuit mainboard; when the TVS tube is disassembled, only the pin needs to be pulled out of the circuit mainboard, which is simple and fast, and is conducive to improving the disassembly and maintenance efficiency of the TVS tube.

[0014] As an option, the pin is two, one of which is wider than the other, so that the widths of the two pins are different, facilitating the operator to distinguish the connection direction and preventing reverse insertion.

[0015] As an option, the circuit mainboard comprises:

[0016] A board body; and

[0017] A mounting seat is electrically connected with the circuit mainboard, and the TVS tube is detachably connected with the mounting seat.

[0018] The mounting seat is fixedly connected with the board body to ensure the stability of the connection between the mounting seat and the board body, and the fixed TVS tube through the mounting seat is conducive to improving the stability of the electrical connection between the TVS tube and the board body, avoiding loosening of the TVS tube connection due to bumps and other factors during vehicle movement, and improving the reliability of the TVS tube work.

[0019] As an option, the TVS tube comprises:

[0020] A first body; and

[0021] A buckle is connected with the first body, and the buckle is engaged with the mounting seat.

[0022] The engagement is conducive to further improving the stability of the connection between the TVS tube and the mounting seat, and avoiding the TVS tube from loosening and falling off the mounting seat.

[0023] As an option, the electronic control unit further comprises:

[0024] A housing, in which the circuit mainboard is located, has an inspection hole, which is arranged corresponding to the position of the TVS tube; and

[0025] A sealing assembly is detachably arranged in the inspection hole.

[0026] When the TVS tube needs to be disassembled and replaced, the sealing assembly is only taken out of the inspection hole, and the operator can disassemble or replace the TVS tube through the inspection hole, which is simple and convenient, and is conducive to improving the efficiency of replacing the TVS tube.

[0027] As an alternative, the inspection hole is a threaded hole, and the sealing assembly comprises:

[0028] a screw plug arranged in the inspection hole and threadedly connected with the shell; and

[0029] a sealing ring sleeved on the screw plug and located between the screw plug and the shell.

[0030] The screw plug is advantageous to ensure the reliability of the sealing assembly in sealing the inspection hole, and the sealing ring is advantageous to improve the waterproof sealing effect of the sealing assembly.

[0031] As an alternative, the electronic control unit further comprises:

[0032] an alarm element connected in series with the TVS tube, and configured to issue a prompt when the TVS tube fails.

[0033] The alarm element is advantageous to make it easier to find and repair the failure of the TVS tube during maintenance, thereby improving the maintenance efficiency.

[0034] As an alternative, the electronic control unit further comprises:

[0035] a protection resistor connected in series with the alarm element and the TVS tube.

[0036] The protection resistor functions as a current limiter and protects the indicator light when the TVS tube fails.

[0037] As an alternative, the screw plug is provided with a visual window, and the sealing assembly further comprises:

[0038] a plug block embedded in the visual window, and the plug block is made of transparent material.

[0039] The operator can directly see the state of the indicator light through the transparent plug block to determine whether the TVS tube is working properly, and the operator does not need to disassemble the sealing assembly to see the indicator light, which makes it easier for the operator to find the problem and improves the maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0041] Figure 1is a structural schematic view of the electric control unit provided by the embodiment of the utility model;

[0042] Figure 2 is the explosion structural schematic view of the electric control unit provided by the embodiment of the utility model;

[0043] Figure 3 is the structural schematic view of the TVS tube provided by the embodiment of the utility model;

[0044] Figure 4 is the assembly structural schematic view of the TVS tube and the mounting seat provided by the embodiment of the utility model;

[0045] Figure 5 is the structural schematic view of the sealing assembly provided by the embodiment of the utility model;

[0046] Figure 6 is the circuit schematic view of the TVS tube, the alarm piece and the protection resistance provided by the embodiment of the utility model.

[0047] The marks in the drawing are as follows:

[0048] 100-circuit mainboard;110-plate body;120-mounting seat;121-second body;122-protrusion;

[0049] 200-TVS tube;210-first body;220-pin;230-buckle;231-power part;232-clamping part;2321-clamping hole, 233-supporting part;

[0050] 300-housing;310-inspection hole;

[0051] 400-sealing assembly;410-screw plug;411-visual window;412-end cap;413-rod body;420-sealing ring;430-plug;

[0052] 500-alarm piece;

[0053] 600-protection resistance. DETAILED DESCRIPTION

[0054] The present application will be further described below in conjunction with the drawings and embodiments. It is particularly pointed out that the following embodiments are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only part of the embodiments of the present application, but not all the embodiments, and all other embodiments obtained by the person skilled in the art without creative labor are within the scope of the present application.

[0055] All the direction indications in the embodiments of the present application, such as up, down, left, right, front, back, and the like, are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications also change accordingly. The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover the non-exclusive inclusion. For example, the process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes the steps or units not listed, or optionally further includes other steps or components inherent to the process, method, product or device.

[0056] The embodiment provides an electronic control unit applied to an engine management system of an automobile.

[0057] As shown in Figure 1 and Figure 2 , the electronic control unit comprises a circuit mainboard 100 and a TVS tube 200. The TVS tube 200 is electrically connected with the circuit mainboard 100. In the working process of the electronic control unit, when the TVS tube 200 detects that the voltage exceeds a set value, the TVS tube 200 quickly responds and can discharge the excess energy, thereby protecting the circuit. The TVS tube 200 is detachably arranged on the circuit mainboard 100. The scheme can detachably connect the TVS tube 200 to the circuit mainboard 100, so that the TVS tube 200 can be separated from the circuit mainboard 100. Therefore, when the TVS tube 200 is overloaded and damaged, the TVS tube 200 can be replaced and repaired alone, which is beneficial to reduce the maintenance cost.

[0058] Please refer to Figure 2 and Figure 3 , optionally, the TVS tube 200 comprises a first body 210 and a pin 220. The pin 220 is connected with the first body 210, and the pin 220 is plug-connected with the circuit mainboard 100. When assembling the TVS tube 200 and the circuit mainboard 100, the operator can directly insert the pin 220 of the TVS tube 200 into the circuit mainboard 100; when disassembling the TVS tube 200, only the pin 220 needs to be pulled out of the circuit mainboard 100, which is simple and fast, and is beneficial to improve the disassembly and maintenance efficiency of the TVS tube 200.

[0059] Further, the pin 220 is two, and the width of one pin 220 is greater than the width of the other pin 220, so that the widths of the two pins 220 are different, which facilitates the operator to distinguish the connection direction and prevent the pins from being inserted reversely.

[0060] Please refer to Figures 2-4In some embodiments, the circuit board 100 comprises a board body 110 and a mounting seat 120. The mounting seat 120 is electrically connected with the board body 110. The mounting seat 120 can be fixedly connected with the board body 110 to ensure the stability of the connection between the mounting seat 120 and the board body 110, so as to avoid the disconnection of the electrical connection between the mounting seat 120 and the board body 110 during the movement of the automobile, thereby affecting the stability of the electronic control unit. Exemplarily, the mounting seat 120 and the board body 110 can be fixed by welding.

[0061] Specifically, the TVS tube 200 is detachably connected with the mounting seat 120. The TVS tube 200 is electrically connected with the board body 110 through the mounting seat 120. The mounting of the TVS tube 200 through the mounting seat 120 is conducive to improving the stability of the electrical connection between the TVS tube 200 and the board body 110, avoiding the loosening of the connection of the TVS tube 200 due to bumping and other factors during the movement of the automobile, and improving the reliability of the operation of the TVS tube 200.

[0062] Specifically, the TVS tube 200 is detachably connected with the mounting seat 120 through the plug-in cooperation between the pin 220 of the TVS tube 200 and the mounting seat 120, so as to facilitate the disassembly and replacement of the TVS tube 200, and improve the efficiency of the disassembly and replacement of the TVS tube 200.

[0063] As an optional solution, the TVS tube 200 is detachably connected with the mounting seat 120 through the clamping cooperation between the TVS tube 200 and the mounting seat 120, so as to further improve the stability of the connection between the TVS tube 200 and the mounting seat 120, and avoid the loosening of the TVS tube 200 from the mounting seat 120.

[0064] As shown in Figure 3 and Figure 4 , the TVS tube 200 comprises a first body 210 and a buckle 230. The buckle 230 is connected with the first body 210. The buckle 230 is clamped with the mounting seat 120 to improve the stability of the connection between the TVS tube 200 and the mounting seat 120. When the automobile engine moves in the working condition of bumping, tilting and the like, the cooperation of the buckle 230 and the mounting seat 120 can ensure the stability of the connection between the TVS tube 200 and the mounting seat 120.

[0065] Further, the mounting seat 120 comprises a second body 121 and a protrusion 122. The protrusion 122 is located on the second body 121. The buckle 230 is clamped with the protrusion 122 to improve the stability of the connection between the buckle 230 and the mounting seat 120.

[0066] Further, please continue to refer to Figure 3 and Figure 4The buckle 230 comprises a power part 231, a clamping part 232 and a supporting part 233. The supporting part 233 is connected with the first body 210, the power part 231 and the clamping part 232 are connected with the supporting part 233 together, and the power part 231 and the clamping part 232 are respectively located on both sides of the supporting part 233, so that the structure of the buckle 230 forms a lever structure with the supporting part 233 as a fulcrum. When assembling the TVS tube 200 and the mounting seat 120, the operator can press the power part 231 to make the distal end of the clamping part 232 away from the first body 210 until it can be clamped with the protrusion 122. When disassembling the TVS tube 200, the operator can press the power part 231 to make the clamping part 232 away from the first body 210, so that the clamping part 232 is separated from the protrusion 122, and then the pin 220 is pulled out, so that the TVS tube 200 can be disassembled from the mounting seat. The structure is simple, which is conducive to improving the convenience of assembling and disassembling the TVS tube 200.

[0067] In some embodiments, the clamping part 232 is provided with a clamping hole, and when the buckle 230 is clamped with the protrusion 122, the protrusion 122 is clamped in the clamping hole.

[0068] In another embodiment, the clamping part 232 has a boss structure, and when the buckle 230 is clamped with the protrusion 122, the boss is clamped with the protrusion 122.

[0069] The electronic control unit further comprises a shell 300, and the circuit mainboard 100 is located in the shell 300 to ensure the waterproof and dustproof sealing of the electronic control unit.

[0070] As an optional solution, as shown in Figure 2 and Figure 5 The shell 300 has an inspection hole 310, which is arranged corresponding to the position of the TVS tube 200, and the sealing assembly 400 is detachably arranged in the inspection hole 310. When it is necessary to disassemble and replace the TVS tube 200, the sealing assembly 400 is only taken out from the inspection hole 310, and the operator can operate the disassembly or replacement of the TVS tube 200 through the inspection hole 310, which is simple and convenient, and is conducive to improving the efficiency of replacing the TVS tube 200.

[0071] In some embodiments, the sealing assembly 400 can be a transparent silica gel plug, which is directly arranged in the inspection hole 310 to achieve the sealing effect.

[0072] As shown in Figure 5As shown in the figure, in some embodiments, the inspection hole 310 is a threaded hole, the sealing assembly 400 includes a threaded nut 410 and a sealing ring 420, the threaded nut 410 is arranged in the inspection hole 310, and the threaded nut 410 is threadedly connected with the shell 300, which is conducive to ensuring the reliability of the sealing assembly 400 in sealing the inspection hole 310 and avoiding the sealing assembly 400 from falling off the inspection hole 310 in a bumpy road condition. The sealing ring 420 is sleeved on the threaded nut 410, and the sealing ring 420 is located between the threaded nut 410 and the shell 300, so as to further improve the waterproof sealing effect of the sealing assembly.

[0073] Optionally, the threaded nut 410 is an internal hexagonal metal threaded nut 410, which is conducive to ensuring the stability of the connection between the threaded nut 410 and the shell 300.

[0074] In some embodiments, the inspection hole 310 is a stepped hole, and the threaded nut 410 includes a rod body 413 and an end cap 412 connected with each other. When the threaded nut 410 is arranged in the inspection hole 310, the rod body 413 is threadedly connected with the shell 300, and the end face of the end cap 412 abuts against the step of the stepped hole, so as to avoid the end cap 412 from protruding from the surface of the shell 300 after the threaded nut 410 is installed on the stepped hole, and to improve the aesthetic appearance of the electronic control unit.

[0075] As an optional solution, as shown in the figures, Figure 1 , Figure 2 and Figure 6 , the electronic control unit further includes an alarm 500, which is connected in series with the TVS tube 200, and the alarm 500 is used to issue a prompt when the TVS tube 200 fails. The alarm 500 can more easily find and repair the failure of the TVS tube 200 during maintenance, which is conducive to improving the maintenance efficiency. Specifically, since the TVS tube 200 is in a high resistance state when it is working normally and almost does not conduct electricity, there is almost no current in the circuit, at this time, the alarm 500 connected in series with the TVS tube 200 has no current passing through, and no alarm occurs. When the TVS tube 200 is burned due to an abnormally large voltage, the state of the TVS tube 200 changes to a low resistance state, at this time, the TVS tube 200 allows current to pass through, and the alarm 500 connected in series with the TVS tube 200 has current passing through, so as to issue a prompt to facilitate the operator to understand that the TVS tube 200 has failed.

[0076] Optionally, the alarm 500 is an indicator light, a buzzer or an alarm. The indicator light, the buzzer or the alarm are common alarm structures, which are convenient to assemble.

[0077] Exemplarily, the alarm 500 in the embodiment is an indicator light. The TVS tube 200 is in a high resistance state in normal operation, and almost no current flows in the circuit, so the indicator light is not lit. When the TVS tube 200 is burned due to an abnormal high voltage, the state of the TVS tube 200 changes to a low resistance state, and the TVS tube 200 allows current to pass at this time, so the indicator light is lit, and the operator can know whether the TVS tube 200 is working normally by observing the state of the indicator light.

[0078] In some embodiments, the indicator light can be arranged on the plate body 110, that is, the indicator light is welded and fixed with the plate body 110, so as to ensure the reliability of the installation of the indicator light. Since the indicator light is not easy to be damaged, it does not need to be disassembled.

[0079] In other embodiments, the indicator light is arranged on the mounting seat 120, and the indicator light can be fixed on the mounting seat 120 or detachably cooperated with the mounting seat 120.

[0080] Optionally, the screw plug 410 is provided with a visible window 411, and the sealing assembly 400 further comprises a plug 430 embedded in the visible window 411. The plug 430 is made of transparent material, and the operator can directly see the state of the indicator light through the transparent plug 430 to determine whether the TVS tube 200 is working normally, without the need for the operator to disassemble the sealing assembly 400 to see the indicator light, so that the operator can find the problem faster and improve the maintenance efficiency.

[0081] Further, the plug 430 and the screw plug 410 are connected by vulcanization embedding, so as to improve the stability of the connection between the plug 430 and the screw plug 410 and the sealing property of the plug 430. The material of the plug 430 can be transparent silica gel.

[0082] Further, the electric control unit further comprises a protection resistor 600 connected in series with the alarm 500 and the TVS tube 200. The protection resistor 600 plays a role of current limiting and protects the indicator light when the TVS tube 200 fails.

[0083] Overall, the protection resistor 600, the alarm 500 and the TVS tube 200 are connected in series in the circuit, so as to realize the role of the alarm 500 in prompting when the TVS tube 200 fails.

[0084] In some embodiments, the protection resistor 600 can be arranged on the plate body 110, that is, the protection resistor 600 is welded and fixed with the plate body 110, so as to ensure the reliability of the installation of the protection resistor 600.

[0085] In other embodiments, the protection resistor 600 is arranged on the mounting seat 120, and the protection resistor 600 can be fixed on the mounting seat 120 or detachably cooperated with the mounting seat 120.

[0086] The working process of the electric control unit will be described below. Figures 1-5 The working process of the electric control unit will be described below.

[0087] As shown in the figure, when the TVS is working, the indicator light is not on. When the TVS fails, the indicator light is on. The operator can see the indicator light on through the plug 430. At this time, the operator only needs to use a tool to take the screw plug 410 off the inspection hole 310, and then press the power part 231 to make the protrusion 122 separate from the clamping hole, and pull out the pin 220, so as to disassemble the TVS tube 200 from the mounting seat 120. Reverse the above process, that is, the TVS tube 200 can be assembled. Figures 1-5 In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0088] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0089] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0090]

[0091] ​In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0092] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0093] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electronic control unit, characterized by The application relates to an electric control unit. The electric control unit comprises: a circuit mainboard (100); and 2. The electronic control unit of claim 1, wherein, a TVS tube (200) electrically connected with the circuit mainboard (100), the TVS tube (200) being detachably arranged on the circuit mainboard (100). The TVS tube (200) comprises: a first body (210); and 3. The electronic control unit of claim 2, wherein, a pin (220) connected with the first body (210), and the pin (220) is inserted into the circuit mainboard (100).

4. The electronic control unit of claim 1, wherein, The pin (220) is two, one of which is wider than the other. The circuit mainboard (100) comprises: a board body (110); and 5. The electronic control unit of claim 4, wherein, a mounting base (120) electrically connected with the board body (110), and the TVS tube (200) is detachably connected with the mounting base (120). The TVS tube (200) comprises: a first body (210); and 6. The electronic control unit of claim 1, wherein, a buckle (230) connected with the first body (210), and the buckle (230) is clamped with the mounting base (120). The electric control unit further comprises: a shell (300) in which the circuit mainboard (100) is arranged, the shell (300) having an inspection hole (310) arranged corresponding to the position of the TVS tube (200); and 7. The electronic control unit of claim 6, wherein, a sealing assembly (400) detachably arranged in the inspection hole (310). The inspection hole (310) is a threaded hole, and the sealing assembly (400) comprises: a screw block (410) arranged in the inspection hole (310) and threadedly connected with the shell (300); and 8. The electronic control unit of claim 7, wherein, a sealing ring (420) sleeved on the screw block (410) and located between the screw block (410) and the shell (300). The screw block (410) is provided with a visible window (411), and the sealing assembly (400) further comprises:

9. The electronic control unit according to any one of claims 1 to 8, characterized by a block (430) embedded in the visible window (411), and the block (430) is made of transparent material. The electric control unit further comprises:

10. The electronic control unit of claim 9, wherein, an alarm member (500) connected in series with the TVS tube (200), and the alarm member (500) is used for giving a prompt when the TVS tube (200) fails. The electric control unit further comprises: a protection resistor (600) connected in series with the alarm member (500) and the TVS tube (200).

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