CN210454715U - Device for reducing electromagnetic interference generated by vehicle ignition system and new energy automobile - Google Patents
Device for reducing electromagnetic interference generated by vehicle ignition system and new energy automobile Download PDFInfo
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- CN210454715U CN210454715U CN201921558061.4U CN201921558061U CN210454715U CN 210454715 U CN210454715 U CN 210454715U CN 201921558061 U CN201921558061 U CN 201921558061U CN 210454715 U CN210454715 U CN 210454715U
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Abstract
The application provides a new energy automobile and a device for reducing electromagnetic interference generated by an ignition system of the automobile. The device includes: a capacitor, the anode of which is connected with the anode of an ignition coil of the ignition system, and the cathode of which is grounded; a connector having a housing for receiving the capacitor, a positive terminal for connection with a positive pole of the capacitor, and a negative terminal for connection with a negative pole of the capacitor, and the capacitor is connected between a positive pole of an ignition coil and ground via the connector; and a holder for holding the connector. According to the present application, a device for reducing electromagnetic interference generated by a vehicle ignition system can be realized with a simple structure. The device is waterproof and shockproof, is fixed firmly, and can bear the severe environment in the engine compartment.
Description
Technical Field
The present application relates to an apparatus for reducing electromagnetic interference generated by a vehicle ignition system. The application also relates to a new energy automobile comprising the device.
Background
For the circuit of the electronic equipment in the vehicle, the oscillation in the circuit excited by any factor can be emitted out in the form of electromagnetic wave through the wire, and not only the radio and the communication equipment are interfered, but also the electronic module such as ECU in the vehicle is also interfered with the electromagnetic wave. Once electronic modules in the vehicle are affected by electromagnetic interference, the problem of abnormal work can occur, and the whole vehicle is out of control seriously or even caused.
Among various electromagnetic interference sources in a vehicle, electromagnetic interference generated when an ignition system operates has characteristics of large energy, wide frequency band, and the like, and thus is generally considered as a most important electromagnetic interference source for vehicle electromagnetic compatibility (EMC), and the electromagnetic interference source also generates electromagnetic radiation to the outside through a wire harness connected to an ignition coil. This not only affects the electromagnetic compatibility performance of the entire vehicle electrical system, but also becomes the biggest obstacle for the entire vehicle to meet the electromagnetic compatibility standard.
Therefore, it is desirable to provide a solution to the above-mentioned problems in the prior art.
SUMMERY OF THE UTILITY MODEL
In view of the above problems in the prior art, the present application provides a solution for reducing electromagnetic interference generated by a vehicle ignition system.
To this end, according to one aspect of the present application, there is provided an apparatus for reducing electromagnetic interference generated by an ignition system of a vehicle, comprising: a capacitor, the anode of which is connected with the anode of an ignition coil of the ignition system, and the cathode of which is grounded; a connector having a housing for receiving the capacitor, a positive terminal for connection with a positive pole of the capacitor, and a negative terminal for connection with a negative pole of the capacitor, and the capacitor is connected between a positive pole of an ignition coil and ground via the connector; and a holder for holding the connector.
According to one possible embodiment, the negative pole of the capacitor has a separate grounding point on the engine block of the vehicle.
According to one possible embodiment, the housing of the connector is a waterproof housing and is configured to enclose the capacitor, and the positive terminal and the negative terminal of the connector are configured to extend outwardly from one end surface of the housing.
According to one possible embodiment, the connector is connected between the positive pole of the ignition coil and ground via a plug electrically connected to the wiring harness of the engine assembly.
According to a possible embodiment, the bracket is arranged in the engine compartment of the vehicle and has a part that cooperates with the connector to hold the connector.
According to a possible embodiment, the part is a groove opened on the holder for insertion of the connector, the groove having a shape that gradually narrows in the direction of insertion of the connector, so that the bottom of the connector is in interference fit with the bottom of the groove.
According to one possible embodiment, the bracket is a wire harness bracket of an engine assembly, and the bracket is fixed to an engine block.
According to one possible embodiment, the capacity of the capacitor is based on the frequency and amplitude of the induced current of the ignition coil.
According to a possible embodiment, the capacitance of the capacitor is greater the frequency of the induced current of the ignition coil, and the greater the amplitude of the induced current of the ignition coil.
According to another aspect of the present application, there is provided a new energy automobile including: the ignition coil loop comprises a plurality of ignition coils for providing ignition energy for an engine ignition system of the new energy automobile, wherein the positive electrodes of the ignition coils are connected together, and the negative electrodes of the ignition coils are connected together; the device as described above, which is connected to the ignition coil circuit by connecting to the positive electrode of each ignition coil; and the engine management system is connected with the control end of each ignition coil so as to control the ignition of each ignition coil.
As can be seen, according to the technical solution of the present application, a device for reducing electromagnetic interference generated by a vehicle ignition system can be realized with a simple structure. The device is waterproof and shockproof, is fixed firmly, and can bear the severe environment in the engine compartment. Moreover, the device also has the advantage of durability.
Drawings
The above and other features and advantages of the present application will be better understood from the following description of preferred embodiments of the present application taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a schematic structural diagram of an apparatus for reducing electromagnetic interference generated by a vehicle ignition system according to a possible embodiment of the present application.
Fig. 2 is a schematic diagram showing the connection of the device of fig. 1 to an in-vehicle ignition system.
Fig. 3 shows a schematic structural view of the holder of the device in fig. 1.
Fig. 4 shows a connector of the device of fig. 1 encapsulating a capacitor of the device according to a possible embodiment of the application.
Detailed Description
Hereinafter, various embodiments of the present application will be described in detail with reference to the accompanying drawings.
Fig. 1 schematically shows an arrangement for reducing electromagnetic interference generated by a vehicle ignition system according to one possible embodiment of the present application. For clarity, the connection of the device of fig. 1 to an in-vehicle ignition system is shown in fig. 2. In fig. 3 a schematic view of the holder of the device of fig. 1 is shown. In fig. 4 a schematic view of a connector of the device of fig. 1 is shown, which encloses a capacitor of the device of fig. 1.
Referring to fig. 1-4, an apparatus according to one possible embodiment of the present application is disposed within a vehicle, for example, within an engine compartment, for reducing electromagnetic interference generated by a vehicle ignition system. The device mainly comprises a capacitor 10, a connector 20 and a holder 30.
The vehicle ignition system includes an ignition coil circuit including a plurality of ignition coils 51-54 for energizing the vehicle engine ignition system. The anodes of the ignition coils are connected together, and the cathodes of the ignition coils are connected together. The control terminal of each ignition coil is connected to an engine management system 60(EMS) to transmit a signal indicative of the ignition (e.g., an ignition complete signal indicating completion of ignition) to the engine management system so that the engine management system knows the ignition of the ignition coil associated with the cylinder. The engine management system 60 may send control signals to the ignition coils via the control terminals 61-64 to control ignition of the ignition coils, e.g., to control the ignition timing of each ignition coil.
It should be understood that although four ignition coils 51 to 54 are illustrated in the drawings, the number of ignition coils is not limited thereto, and the number thereof may be set according to the number of cylinders. For example, one ignition coil is provided for each cylinder, for example, four ignition coils for four cylinders; alternatively, one ignition coil is shared by every two cylinders, for example, three ignition coils are used for six cylinders.
The capacitor 10 is located in the vehicle engine compartment and is connected to the ignition coil circuit. The filter characteristics (i.e., ac current and dc current) of the capacitor 10 are utilized to reduce the electromagnetic interference generated by the ignition coil, thereby improving the electromagnetic compatibility (EMC) performance of the entire vehicle.
The positive electrode of the capacitor 10 is connected to the positive electrode of each ignition coil, and the negative electrode of the capacitor is grounded. The grounding point of the capacitor (see GND in fig. 2) is a separate grounding point and does not share a grounding point with other electronic components. Thus, the electromagnetic interference generated by the ignition coil can be further reduced without mutual interference due to the common grounding point with other electronic components. In one embodiment, the grounding point of the capacitor 10 may be provided on the engine block, for example, on the metal casing of the engine.
In order to avoid the influence of the harsh environment of the vehicle-mounted engine on the capacitor, the capacitor 10 needs to be firmly fixed and have waterproof and shockproof functions. For this purpose, the capacitor 10 is enclosed in the connector 20, and the connector 20 is fixed to the holder 30.
The connector 20 has a case 21, a positive terminal 22 electrically connected to the positive electrode 12 of the capacitor 10, and a negative terminal 24 electrically connected to the negative electrode 14 of the capacitor 10. The housing 21 of the connector 20 may be made of a non-conductive material such as plastic. The housing of the connector 20 is realized as a waterproof housing. The housing of the connector 20 is shaped to receive the capacitor, e.g., the shape of the housing substantially conforms to the outer shape of the capacitor, and the size of the housing of the connector is slightly larger than the size of the capacitor (see fig. 4). The positive terminal 22 and the negative terminal 24 of the connector 20 each extend outwardly from a surface 25 at one end of the housing to form a connector style. In one embodiment, a lead may be connected to the positive terminal 22 and the negative terminal 24 of the connector 20, respectively. That is, the capacitor 10 is completely enclosed in the case 21, and the positive electrode 12 and the negative electrode 14 thereof are electrically connected to the outside via the positive terminal 22 and the negative terminal 24 of the connector 20, respectively. Thus, the connector 20 is configured as a socket connector that encloses the capacitor 10.
In one embodiment, the connector 20 is electrically connected to a plug (not shown) that is electrically connected to the wiring harness of the engine assembly, the positive pole of the plug being connected to the positive pole of each ignition coil, and the negative pole of the plug being connected to a ground point on the engine block. That is, the connector 20 is connected between the positive electrode of each ignition coil and the ground point on the engine body via the plug.
The holder 30 is used to hold the connector 20. The holder 30 is provided with a groove 31 for holding the connector. The connector 20 is inserted into the groove 31 so as to be held by the groove 31. The groove 31 has a shape that gradually narrows in the insertion direction of the connector 20. That is, the groove 31 has a pattern that is wide at the top and narrow at the bottom, so that the bottom of the connector 20 is interference-fitted with the bottom of the groove when the connector 20 is fitted into the groove 31 from the top down. Hereby, it is achieved that the connector is firmly fixed in the bracket without any additional fixing member. The bracket 30 may be implemented as a harness bracket of a transmitter assembly, mounted on a transmitter body.
In addition, according to the embodiment of the application, the new energy automobile comprises an ignition coil circuit, a device for reducing electromagnetic interference generated by an ignition system of the new energy automobile and an engine management system. The ignition coil loop comprises a plurality of ignition coils for providing ignition energy for an engine ignition system of the new energy automobile, the positive electrodes of all the ignition coils are connected together, and the negative electrodes of all the ignition coils are connected together. The device for reducing the electromagnetic interference generated by the ignition system of the new energy automobile is connected with the ignition coil loop through the anode connection of each ignition coil. The engine management system is connected with the control end of each ignition coil to control the ignition of each ignition coil.
In this embodiment, the ignition coil circuit, the device for reducing electromagnetic interference generated by the ignition system of the new energy automobile, and the engine management system can all be implemented by using the corresponding components described above, and therefore the description related to the above is also applicable to this.
According to the technical scheme of this application, can reduce the electromagnetic interference that ignition system produced to improve the electromagnetic interference problem of whole car. In addition, the electromagnetic interference generated by the ignition system is reduced, and meanwhile, the coupling interference problem of other electronic systems (such as an audio-visual entertainment system) in the vehicle can be reduced, so that the whole vehicle can pass EMC (electro magnetic compatibility) regulation and test.
In addition, the device for reducing the electromagnetic interference generated by the vehicle ignition system has the advantages of simple and convenient installation, firm fixation, waterproof and shockproof functions, capability of bearing severe environment in an engine cabin and durability. In addition, the device also has the effect of improving the aesthetic property in the engine compartment.
The technical content and technical features of the present invention have been disclosed above, but it should be understood that various changes and modifications can be made to the concept disclosed above by those skilled in the art under the inventive concept of the present invention, and all fall within the scope of the present invention. The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.
Claims (10)
1. An apparatus for reducing electromagnetic interference generated by a vehicle ignition system, comprising:
a capacitor, the anode of which is connected with the anode of an ignition coil of the ignition system, and the cathode of which is grounded;
a connector having a housing for receiving the capacitor, a positive terminal for connection with a positive pole of the capacitor, and a negative terminal for connection with a negative pole of the capacitor, and the capacitor is connected between a positive pole of an ignition coil and ground via the connector; and
a holder for holding the connector.
2. The apparatus for reducing electromagnetic interference generated by a vehicle ignition system of claim 1, wherein the negative terminal of the capacitor has a separate ground point located on an engine block of the vehicle.
3. The apparatus for reducing electromagnetic interference generated by a vehicle ignition system of claim 1, wherein the housing of the connector is a waterproof housing and is configured to enclose the capacitor, and the positive and negative terminals of the connector are configured to extend outwardly from one end surface of the housing.
4. The apparatus for reducing electromagnetic interference generated by a vehicle ignition system of claim 1, wherein the connector is connected between a positive pole of the ignition coil and ground via a plug electrically connected to a wiring harness of the engine assembly.
5. The apparatus for reducing electromagnetic interference generated by a vehicle ignition system of claim 1, wherein the bracket is disposed within an engine compartment of a vehicle and the bracket has a feature that cooperates with a connector to retain the connector.
6. The apparatus for reducing electromagnetic interference generated by an ignition system of a vehicle according to claim 5, wherein the member is a groove opened on the holder for insertion of the connector, the groove having a shape that gradually narrows in an insertion direction of the connector so that a bottom of the connector is in interference fit with a bottom of the groove.
7. The apparatus for reducing electromagnetic interference generated by a vehicle ignition system of claim 1, wherein the bracket is a wiring harness bracket of an engine assembly and the bracket is secured to an engine block.
8. The apparatus for reducing electromagnetic interference generated by a vehicle ignition system of claim 1, wherein the capacitance of the capacitor is based on a frequency and an amplitude of an induced current of the ignition coil.
9. The apparatus for reducing electromagnetic interference generated by an ignition system of a vehicle according to claim 8, wherein the larger the frequency of the induced current of the ignition coil, the larger the capacity of the capacitor, and the larger the amplitude of the induced current of the ignition coil, the larger the capacity of the capacitor.
10. A new energy automobile is characterized by comprising:
the ignition coil loop comprises a plurality of ignition coils for providing ignition energy for an engine ignition system of the new energy automobile, wherein the positive electrodes of the ignition coils are connected together, and the negative electrodes of the ignition coils are connected together;
the device of any one of claims 1-9, which is connected into the ignition coil loop by a positive connection to each ignition coil; and
and the engine management system is connected with the control end of each ignition coil so as to control the ignition of each ignition coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921558061.4U CN210454715U (en) | 2019-09-19 | 2019-09-19 | Device for reducing electromagnetic interference generated by vehicle ignition system and new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921558061.4U CN210454715U (en) | 2019-09-19 | 2019-09-19 | Device for reducing electromagnetic interference generated by vehicle ignition system and new energy automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210454715U true CN210454715U (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921558061.4U Active CN210454715U (en) | 2019-09-19 | 2019-09-19 | Device for reducing electromagnetic interference generated by vehicle ignition system and new energy automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210454715U (en) |
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2019
- 2019-09-19 CN CN201921558061.4U patent/CN210454715U/en active Active
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