New energy automobile electronic vacuum pump, automobile and energy recovery method thereof

Abstract

The application discloses a new energy automobile electronic vacuum pump, an automobile and an energy recovery method, and belongs to the field of new energy automobiles. The electronic vacuum pump generates variable vibrations during work. The variable vibrations generated by the main body of the electronic vacuum pump are converted into variable forces acting on the surface of a piezoelectric energy feedback device through the transmission of a vacuum pump rubber pad. The piezoelectric energy feedback device generates an electric polarization phenomenon under the action of the variable forces, and then generates an induced current. The induced current is transmitted to an external energy recovery unit. On the one hand, the vibration of the electronic vacuum pump is relieved through the elastic deformation of the vacuum pump rubber pad. On the other hand, a second layer of damping effect is achieved through a magneto-rheological damper, so that the vibration sensation is effectively reduced. The application is novel and reasonable in design, and is convenient to use. The application reduces the working vibration and noise of the electronic vacuum pump, improves the riding comfort, recovers part of the vibration energy of the vacuum pump during the working process, is green and energy-saving, and is convenient to use and popularize.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicles, specifically relating to a new energy vehicle electronic vacuum pump and its vehicle and energy recovery method. Background Technology

[0002] New energy vehicles lack an engine intake manifold, thus lacking a vacuum source for the booster. In this situation, the vacuum booster cannot provide assistance to the driver, affecting driving safety. An electronic vacuum pump can maintain a certain vacuum level within the booster, ensuring driving safety. However, the electronic vacuum pump generates noise, which is more noticeable inside the cabin of new energy vehicles without an engine. Optimizing the noise of the electronic vacuum pump is a challenge that new energy vehicle manufacturers must address to achieve better driving comfort.

[0003] Existing technologies use a single electronic vacuum pump and its rubber pads for vibration damping, which has limited effect on reducing the vibration and noise of the electronic vacuum pump. Furthermore, the energy generated by the vacuum pump vibration is not recovered, resulting in a waste of resources. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a new energy vehicle electronic vacuum pump and its vehicle and energy recovery method to solve the technical problems of the prior art, which uses a single electronic vacuum pump and its vibration damping rubber pad, which has limited effect on reducing the working vibration and noise of the electronic vacuum pump, and does not recover the energy generated by the vibration of the vacuum pump, resulting in resource waste.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A new energy vehicle electronic vacuum pump includes an electronic vacuum pump body, on which a mounting base is provided. From bottom to top, a magnetorheological damper, a piezoelectric energy feeding device, and a vacuum pump rubber pad are arranged on the mounting base. The magnetorheological damper and the piezoelectric energy feeding device are electrically connected to an external energy recovery unit.

[0007] Preferably, the magnetorheological damper comprises: a magnetorheological damper cylinder, which is mounted on a mounting base and has an excitation coil inside. The excitation coil is electrically connected to an external energy recovery unit, and a guide pad is embedded on its top. A piezoelectric energy feeding device is disposed above the guide pad.

[0008] Preferably, the guide gasket and the cylinder of the magnetorheological damper form a sealed space containing magnetorheological fluid.

[0009] Preferably, the energy recovery unit includes: a rectifier, the input end of which is connected to a piezoelectric energy feeding device, and its output end is sequentially connected to a DC-DC boost module, a supercapacitor, a first MOS switch trigger drive module, and a battery. The first output end of the battery is sequentially connected to a second MOS switch trigger drive module, a controllable constant current source control module, and an excitation coil. The output end of the supercapacitor is also connected to a voltage sensor. The output end of the voltage sensor is connected to the input end of a controller. The input end of the controller is also connected to the second output end of the battery, the output end of a temperature sensor, and the output end of a rubber pad acceleration sensor. The output end of the controller is connected to a DC-DC boost module, a first MOS switch trigger drive module, a second MOS switch trigger drive module, and a controllable constant current source control module.

[0010] Preferably, the mounting base is fixed to the body of the electronic vacuum pump by fastening bolts.

[0011] This invention also discloses an energy recovery method for a new energy vehicle electronic vacuum pump based on any one of the above-mentioned methods, comprising the following steps:

[0012] The main body of the electronic vacuum pump operates, generating variable vibration;

[0013] The vacuum pump rubber pad converts the generated variable vibrations into variable forces, which are then applied to the piezoelectric energy feeding device.

[0014] The piezoelectric energy feeding device generates an induced current under the action of a variable force and inputs it into the energy recovery unit.

[0015] Preferably, the energy recovery unit includes: a battery, a rectifier, a DC-DC boost module, a supercapacitor, a voltage sensor, a first MOS switch trigger drive module, a temperature sensor, an acceleration sensor, a controllable constant current source control module, and a controller; then, the induced current generated by the piezoelectric energy feeding device inputting the energy recovery unit specifically includes the following steps:

[0016] S301: Inductive current input rectifier, output DC power;

[0017] S302: DC power is boosted by the DC-DC boost module and temporarily stored in the supercapacitor. The voltage sensor detects the voltage value at the supercapacitor terminal in real time and sends the detected voltage value to the controller in real time.

[0018] S303: The controller compares the received voltage value with the preset threshold and determines whether to charge the battery accordingly.

[0019] Preferably, in S303,

[0020] If the voltage value is not less than the preset threshold, the controller controls the first MOS switch to trigger the drive module to turn on, and the supercapacitor charges the battery.

[0021] If the voltage value is not greater than the preset threshold, the controller controls the first MOS switch to trigger the drive module to disconnect, and the supercapacitor stops charging the battery.

[0022] Preferably, the magnetorheological damper includes an excitation coil, and the energy recovery unit includes: a second MOS switch trigger drive module and a controller;

[0023] The controller changes the stiffness of the magnetorheological fluid by altering the current in the excitation coil, thereby reducing the vibration of the electronic vacuum pump body. The specific method is as follows:

[0024] The controller is based on the formula

[0025]

[0026] Calculation yields the first The input current of the excitation coil during the next sampling;

[0027] The controller controls the second MOS switch to trigger the drive module to turn on, and controls the output current of the second controllable constant current source control module to be... Power the excitation coil;

[0028] in, The stiffness of the first-stage and second-stage vibration damping devices in the design; For the stiffness of the rubber pad base; This is the temperature compensation coefficient for the rubber pad; The basic stiffness coefficient of the magnetorheological fluid; This is the stiffness coefficient compensation amount of the magnetorheological fluid when it is affected by electromagnetic fields.

[0029] The present invention also discloses an automobile, including the new energy vehicle electronic vacuum pump described in any one of the above.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The electronic vacuum pump disclosed in this invention generates variable vibration during operation. Through the transmission effect of the vacuum pump's rubber pad, this variable vibration is converted into a variable force acting on the surface of a piezoelectric energy feeding device. Under this variable force, the piezoelectric energy feeding device exhibits polarization, thereby generating an induced current. This induced current is then transmitted to an external energy recovery unit. Simultaneously, the elastic deformation of the vacuum pump's rubber pad alleviates the vibration of the electronic vacuum pump, while a magnetorheological damper provides a second layer of vibration reduction. This effectively reduces vibration, improves passenger comfort, and recovers some of the vibration energy generated during operation. This invention is novel and reasonable in design, easy to implement, and simultaneously reduces the vibration and noise of the electronic vacuum pump, improving passenger comfort while recovering some of its vibration energy. It is green and energy-saving, and easy to promote and use. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the device structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the circuit connection of the energy recovery unit of the present invention;

[0034] Figure 3 This is a flowchart of the method of the present invention.

[0035] The components are as follows: 1-Electronic vacuum pump body; 2-Mounting bolts; 3-Vacuum pump rubber pad; 4-Piezoelectric power supply unit; 5-Magnetorheological damper cylinder; 6-Control bus; 7-Rubber sealing guide gasket; 8-Excitation coil; 9-Mounting base; 10-Battery; 11-Rectifier; 12-DC-DC boost module; 13-Supercapacitor; 14-Voltage sensor; 15-First MOS switch trigger drive module; 16-Second MOS switch trigger drive module; 17-Temperature sensor; 18-Rubber pad accelerometer; 19-Controllable constant current source module; 20-Controller. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] The present invention will now be described in further detail with reference to the accompanying drawings:

[0039] See Figure 1 This invention discloses an electronic vacuum pump for new energy vehicles, comprising an electronic vacuum pump body 1, a mounting base 9 on the electronic vacuum pump body 1, and a magnetorheological damper, a piezoelectric energy feeding device 4, and a vacuum pump rubber pad 3 arranged sequentially from bottom to top on the mounting base 9. The magnetorheological damper and the piezoelectric energy feeding device 4 are electrically connected to an external energy recovery unit. When the electronic vacuum pump operates, it generates variable vibration. Through the transmission effect of the vacuum pump rubber pad 3, the variable vibration generated by the electronic vacuum pump body 1 is converted into a variable force acting on the upper surface of the piezoelectric energy feeding device 4. Under the action of the variable force, the piezoelectric energy feeding device 4 generates polarization, thereby generating an induced current. This induced current is transmitted to the external energy recovery unit. Simultaneously, on the one hand, the elastic deformation of the vacuum pump rubber pad 3 alleviates the vibration of the electronic vacuum pump; on the other hand, the magnetorheological damper provides a second layer of vibration damping, effectively reducing vibration and improving ride comfort while recovering some of the vibration energy of the vacuum pump during operation. This invention is novel and reasonable in design, easy to implement, and improves passenger comfort by reducing the vibration and noise of the electronic vacuum pump during operation. It also recovers some of the vibration energy of the vacuum pump during operation, making it green and energy-saving, and easy to promote and use.

[0040] In some embodiments, the magnetorheological damper includes: a magnetorheological damper cylinder 5, which is mounted on a mounting base 9 and has an excitation coil 8 inside. The excitation coil 8 is electrically connected to an external energy recovery unit, and a guide pad 7 is embedded on its top. A piezoelectric energy feeding device 4 is disposed above the guide pad 7.

[0041] In some embodiments, the guide gasket 7 and the magnetorheological damper cylinder 5 form a sealed space to store magnetorheological fluid.

[0042] In some embodiments, see Figure 2The energy recovery unit includes: a rectifier 11, the input end of which is connected to the piezoelectric energy feeding device 4, and its output end is sequentially connected to a DC-DC boost module 12, a supercapacitor 13, a first MOS switch trigger drive module 15, and a battery 10. The first output end of the battery 10 is sequentially connected to a second MOS switch trigger drive module 16, a controllable constant current source control module 19, and an excitation coil 8. The output end of the supercapacitor 13 is also connected to a voltage sensor 14. The output end of the voltage sensor 14 is connected to the input end of a controller 20. The input end of the controller 20 is also connected to the second output end of the battery 10, the output end of a temperature sensor 17, and the output end of a rubber pad acceleration sensor 18. The output end of the controller 20 is connected to the DC-DC boost module 12, the first MOS switch trigger drive module 15, the second MOS switch trigger drive module 16, and the controllable constant current source control module 19.

[0043] In some embodiments, the mounting base 9 is fixedly connected to the electronic vacuum pump body 1 by fastening bolts 2.

[0044] In some embodiments, a two-stage vibration damping device is included, wherein the first-stage vibration damping device is a vacuum pump rubber pad 3, and the second-stage vibration damping device is composed of a magnetorheological damper cylinder 5, a rubber sealing guide gasket 7, and a magnetorheological fluid.

[0045] In some embodiments, the control bus 6 is connected to the piezoelectric power supply device 4 and the excitation coil 8 through the internal structural features of the electronic vacuum pump body 1.

[0046] During the braking process of a pure electric vehicle, the electronic vacuum pump performs vacuuming. At this time, the main body 1 of the electronic vacuum pump generates variable vibration, which is transmitted through the vacuum pump rubber pad 3 and converted into a variable force acting on the surface of the piezoelectric energy feeding device 4. Under the action of this variable force, the piezoelectric energy feeding device 4 exhibits polarization, thereby generating an induced current. This induced current first passes through the rectifier 11 for rectification and filtering to become a stable direct current. Then, it is boosted by the DC-DC boost module 12 and temporarily stored in the supercapacitor 13. The voltage sensor 14 continuously monitors the voltage V at the terminal of the supercapacitor 13. 00 The detected voltage at the supercapacitor 13 terminal is transmitted to the controller 20 in real time, and the controller 20, based on the judgment result, determines the voltage value V. 00 With the set voltage value V min and V max The size of the space determines the charging and discharging of the supercapacitor 13 to the battery 10. When V00 is not less than V max When the controller 20 controls the first MOS switch to trigger the drive module 15 to turn on, the supercapacitor 13 charges the battery 10. When V00 is not greater than V minWhen the controller 20 controls the first MOS switch to trigger the drive module 15 to disconnect, the supercapacitor 13 stops charging the battery 10;

[0047] This invention also discloses an energy recovery method based on the above-mentioned electronic vacuum pump for new energy vehicles, see [link to relevant documentation]. Figure 3 This includes the following steps:

[0048] S1: The main body 1 of the electronic vacuum pump is working, generating variable vibration;

[0049] S2: The vacuum pump rubber pad 3 converts the generated variable vibration into variable force, which acts on the piezoelectric energy feeding device 4;

[0050] S3: The piezoelectric energy feeding device 4 generates an induced current under the action of a variable force and inputs it into the energy recovery unit.

[0051] In some embodiments, the energy recovery unit includes: a battery 10, a rectifier 11, a DC-DC boost module 12, a supercapacitor 13, a voltage sensor 14, a first MOS switch trigger drive module 15, a temperature sensor 17, an acceleration sensor 18, a controllable constant current source control module 19, and a controller 20; then the induced current generated by the piezoelectric energy feeding device 4 inputting to the energy recovery unit specifically includes the following steps:

[0052] S301: Inductive current input rectifier 11, output DC power;

[0053] S302: After the DC power is boosted by the DC-DC boost module 12, it is temporarily stored in the supercapacitor 13, and the voltage sensor 14 detects the voltage value at the end of the supercapacitor 13 in real time and transmits the detected voltage value to the controller 20 in real time.

[0054] S303: The controller 20 compares the received voltage value with the preset threshold and determines whether to charge the battery 10 accordingly.

[0055] In some embodiments, in S303,

[0056] If the voltage value is not less than the preset threshold, the controller 20 controls the first MOS switch to trigger the drive module 15 to turn on, and the supercapacitor 13 charges the battery 10.

[0057] If the voltage value is not greater than the preset threshold, the controller 20 controls the first MOS switch to trigger the drive module 15 to disconnect, and the supercapacitor 13 stops charging the battery 10.

[0058] In some embodiments, the magnetorheological damper includes an excitation coil 8, and the energy recovery unit includes a second MOS switch trigger drive module 16 and a controller 20;

[0059] The controller 20 changes the stiffness of the magnetorheological fluid by altering the current in the excitation coil 8, thereby reducing the vibration of the electronic vacuum pump body 1. The specific method is as follows:

[0060] Controller 20 according to formula

[0061]

[0062] Calculation yields the first The input current of excitation coil 8 during the next sampling;

[0063] The controller 20 controls the second MOS switch trigger drive module 16 to turn on, and controls the output current of the second controllable constant current source control module 46 to be... Power is supplied to excitation coil 8;

[0064] in, The stiffness of the first-stage and second-stage vibration damping devices in the design; For the basic stiffness of the rubber pad 3; The temperature compensation coefficient for rubber pad 3; The basic stiffness coefficient of the magnetorheological fluid; This is the stiffness coefficient compensation amount of the magnetorheological fluid when it is affected by electromagnetic fields.

[0065] The present invention also discloses an automobile, including the new energy vehicle electronic vacuum pump described in any one of the above.

[0066] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A new energy vehicle electronic vacuum pump, characterized in that, It includes an electronic vacuum pump body (1), an electronic vacuum pump body (1) is provided with a mounting base (9), and a magnetorheological damper, a piezoelectric energy feeding device (4) and a vacuum pump rubber pad (3) are arranged sequentially from bottom to top on the mounting base (9). The magnetorheological damper and the piezoelectric energy feeding device (4) are electrically connected to an external energy recovery unit. The energy recovery unit includes: a rectifier (11), the input end of which is connected to a piezoelectric energy feeding device (4), and its output end is connected in sequence to a DC-DC boost module (12), a supercapacitor (13), a first MOS switch trigger drive module (15) and a storage battery (10). The first output end of the storage battery (10) is connected in sequence to a second MOS switch trigger drive module (16), a controllable constant current source control module (19) and an excitation coil (8). The output end of the supercapacitor (13) is also connected to a voltage sensor (14). The output end of the voltage sensor (14) is connected to the input end of a controller (20). The input end of the controller (20) is also connected to the second output end of the storage battery (10), the output end of a temperature sensor (17) and the output end of a rubber pad acceleration sensor (18). The output end of the controller (20) is connected to a DC-DC boost module (12), a first MOS switch trigger drive module (15), a second MOS switch trigger drive module (16) and a controllable constant current source control module (19).

2. The electronic vacuum pump for new energy vehicles according to claim 1, characterized in that, The magnetorheological damper includes: a magnetorheological damper cylinder (5), which is mounted on a mounting base (9) and has an excitation coil (8) inside. The excitation coil (8) is electrically connected to an external energy recovery unit and has a guide pad (7) embedded on its top. A piezoelectric energy feeding device (4) is provided above the guide pad (7).

3. The electronic vacuum pump for new energy vehicles according to claim 2, characterized in that, The guide gasket (7) and the magnetorheological damper cylinder (5) form a sealed space containing magnetorheological fluid.

4. The electronic vacuum pump for new energy vehicles according to claim 1, characterized in that, The mounting base (9) is fixed to the body of the electronic vacuum pump (1) by fastening bolts (2).

5. The energy recovery method for the electronic vacuum pump of a new energy vehicle according to any one of claims 1 to 4, characterized in that, Includes the following steps: The main body (1) of the electronic vacuum pump operates, generating variable vibration; The vacuum pump rubber pad (3) converts the generated variable vibration into variable force, which acts on the piezoelectric energy feeding device (4); The piezoelectric energy feeding device (4) generates an induced current under the action of a variable force and inputs it into the energy recovery unit.

6. The energy recovery method according to claim 5, characterized in that, The energy recovery unit includes: a battery (10), a rectifier (11), a DC-DC boost module (12), a supercapacitor (13), a voltage sensor (14), a first MOS switch trigger drive module (15), a temperature sensor (17), an acceleration sensor (18), a controllable constant current source control module (19), and a controller (20); the induced current generated by the piezoelectric energy feeding device (4) input to the energy recovery unit specifically includes the following steps: S301: Inductive current input rectifier (11), output DC power; S302: DC power is boosted by DC-DC boost module (12) and temporarily stored in supercapacitor (13). Voltage sensor (14) detects the voltage value at the end of supercapacitor (13) in real time and transmits the detected voltage value to controller (20) in real time. S303: The controller (20) compares the received voltage value with the preset threshold and determines whether to charge the battery (10) accordingly.

7. The energy recovery method according to claim 6, characterized in that, In S303 If the voltage value is not less than the preset threshold, the controller (20) controls the first MOS switch to trigger the drive module (15) to turn on, and the supercapacitor (13) charges the battery (10); If the voltage value is not greater than the preset threshold, the controller (20) controls the first MOS switch to trigger the drive module (15) to disconnect, and the supercapacitor (13) stops charging the battery (10).

8. The energy recovery method according to claim 5, characterized in that, The magnetorheological damper includes an excitation coil (8), and the energy recovery unit includes a second MOS switch trigger drive module (16) and a controller (20). The controller (20) changes the stiffness of the magnetorheological fluid by changing the current in the excitation coil (8), thereby reducing the vibration of the electronic vacuum pump body (1). The specific method is as follows: The controller (20) is based on the formula Calculation yields the first The input current of the excitation coil (8) during the next sampling; The controller (20) controls the second MOS switch trigger drive module (16) to turn on, and controls the output current of the second controllable constant current source control module (46) to be... Power is supplied to the excitation coil (8); in, The stiffness of the first-stage and second-stage vibration damping devices in the design; For the rubber pad (3) base stiffness; The temperature compensation coefficient of the rubber pad (3); The basic stiffness coefficient of the magnetorheological fluid; This is the stiffness coefficient compensation amount of the magnetorheological fluid when it is affected by electromagnetic fields.

9. A car, characterized in that, The new energy vehicle electronic vacuum pump includes any one of claims 1 to 4.

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