Output force control method of active stabilizer bar, force transmission assembly and vehicle

Abstract

The invention provides an output force control method of an active stabilizer bar, a force transmission assembly and a vehicle, and relates to the technical field of active stabilizer bars. According to the output force control method of the active stabilizer bar, the mode that in the prior art, a torque sensor is used for measuring force from an output flange of the active stabilizer bar is changed, and the force measuring position is arranged outside the active stabilizer bar and located between the active stabilizer bar and a suspension mechanism; and the first force generated by the movement of the suspension mechanism is measured at the force measurement position, so that the force generated by the movement of the suspension mechanism is obtained from the position closer to the suspension mechanism, and the response speed of force measurement is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of active stabilizer bar, in particular to an output force control method of active stabilizer bar, a force transmission assembly and a vehicle. BACKGROUND

[0002] The detection method of the active stabilizer bar in the related art corresponding to the power output is torque detection, and a torque sensor is used as the detection component. The sensor is usually located inside the fixed flange of the fixed swing arm of the active stabilizer bar.

[0003] Specifically, from the installation process point of view, when the torque sensor is installed into the fixed flange as above, the middle shaft tail threaded part of the torque sensor needs to be screwed into the fixed flange, and the fixed swing arm with the installed torque sensor is placed into a welding device, and then the torque sensor and the fixed flange connection part are welded. After welding, the fixed swing arm is subjected to aging treatment cycle, and the cycle time is about 12 hours. If the first cycle does not meet the standard, the aging cycle will be entered again. Finally, the fixed swing arm is placed into a torque sensor calibration device, and the initial torque value of the torque sensor is calibrated to the required initial torque value.

[0004] In addition, after the torque sensor is installed, corresponding data transmission board, data transmission board bracket and other components need to be installed. As can be seen, the time invested in the early stage of installing a fixed swing arm that can be welded is long, and the process is relatively complex, and there is a certain rate of defective products. From the aspect of product maintenance in the later stage, when the torque sensor fails at low temperature during use, it is relatively difficult and time-consuming to replace the torque sensor. In addition, from the ideal state, the process of receiving the torque signal, real-time monitoring of the torque sensor and feedback of the torque signal, the active stabilizer bar can achieve an output of 0-900Nm within 160ms, and in rare cases, a longer response time may occur. This phenomenon cannot be avoided in the entire assembly process. SUMMARY

[0005] Therefore, the present application provides an output force control method of active stabilizer bar, a force transmission assembly and a vehicle, which aims to solve the above technical problems to some extent.

[0006] According to a first aspect of the present application, an output force control method of active stabilizer bar is provided, the active stabilizer bar comprising an output part, the output part being connected to a suspension mechanism of a vehicle via a force transmission assembly, the output force control method comprising: selecting a force measurement position between the output part and the suspension mechanism; obtaining a first force from the force measurement position generated by the movement of the suspension mechanism; In response to the first force obtained from the force measuring position, the output part of the active stabilizer is controlled to apply force to generate a second force to balance the first force at the force measuring position.

[0007] On the basis of the above technical solutions, optionally, the selecting the force measuring position between the output part and the suspension mechanism comprises: selecting the force measuring position on the force transmission assembly.

[0008] On the basis of the above technical solutions, optionally, the selecting the force measuring position between the output part and the suspension mechanism further comprises: disposing a force sensor at the force measuring position, wherein the force sensor is part of the force transmission assembly.

[0009] On the basis of the above technical solutions, optionally, the selecting the force measuring position between the output part and the suspension mechanism further comprises: The force sensor is configured as a tension-compression sensor having a first force receiving surface and a second force receiving surface opposite to each other, and the force transmission assembly is configured to have a first tension rod and a second tension rod, the first tension rod is disposed at the first force receiving surface, and the second tension rod is disposed at the second force receiving surface, wherein the first tension rod is connected to the suspension mechanism, and the second tension rod is connected to the output part.

[0010] On the basis of the above technical solutions, optionally, the selecting the force measuring position between the output part and the suspension mechanism further comprises: A protective shell is configured outside the force sensor, wherein the protective shell completely contains the force sensor.

[0011] On the basis of the above technical solutions, optionally, the output force control method further comprises: The wire harness of the force sensor is connected to the same control unit as the wire harness of the active stabilizer.

[0012] According to a second aspect of the present application, a force transmission assembly is provided, which connects an output part of an active stabilizer and a suspension mechanism of a vehicle, and comprises: a force sensor having a first force receiving surface and a second force receiving surface opposite to each other; a first tension rod and a second tension rod, the first tension rod is disposed at the first force receiving surface, and the second tension rod is disposed at the second force receiving surface, the first tension rod is connected to the suspension mechanism, and the second tension rod is connected to the output part; wherein the force sensor is used to obtain the force generated on the force sensor by the movement of the suspension mechanism.

[0013] On the basis of the above technical solutions, optionally, the force sensor is a tension-compression sensor.

[0014] Optionally, the force transmission assembly further comprises a protective shell, and the protective shell completely contains the force sensor.

[0015] According to a third aspect of the present application, a vehicle is provided, which executes the output force control method of the active stabilizer bar as described above, and / or which comprises the force transmission assembly as described above.

[0016] According to the output force control method of the active stabilizer bar provided by the present application, the force measurement position is set outside the active stabilizer bar and between the active stabilizer bar and the suspension mechanism, and the first force generated by the movement of the suspension mechanism is measured at the force measurement position, so that the force generated by the movement of the suspension mechanism is obtained from a position closer to the suspension mechanism, which is beneficial to improve the response speed of force measurement.

[0017] In order to make the above objectives, features and advantages of the present application more apparent, clear and easy to understand, the following will specifically describe a preferred embodiment in conjunction with the accompanying drawings, and a detailed description is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 A schematic diagram of a force transmission assembly according to an embodiment of the present application is shown, which omits a protective shell; Figure 2 A schematic diagram of a force transmission assembly according to an embodiment of the present application is shown; Figure 3 A schematic diagram of a three-dimensional diagram of an active stabilizer bar, a force transmission assembly and a suspension mechanism assembled integrally according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described in detail below with reference to the drawings, and obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed in the present application.

[0024] According to the first aspect of the embodiment of the present application, an output force control method of an active stabilizer bar is provided, and the steps of the output force control method of the active stabilizer bar will be described in detail below with reference to the drawings.

[0025] According to the output force control method of the active stabilizer bar provided by the embodiment of the present application, the active stabilizer bar includes an output part, and the output part is connected to a suspension mechanism of a vehicle via a force transmission assembly. The output force control method includes: Selecting a force measurement position between the output part and the suspension mechanism; Obtaining a first force from the force measurement position generated by the movement of the suspension mechanism; In response to the first force obtained from the force measurement position, controlling the output part of the active stabilizer bar to apply force to generate a second force at the force measurement position to balance the first force.

[0026] Thus, according to the active stabilizer bar output force control method provided in the embodiments of this application, this control method changes the prior art method of using a torque sensor to measure force from the output flange of the active stabilizer bar. Instead, the force measuring position is set outside the active stabilizer bar, between the active stabilizer bar and the suspension mechanism, and the first force generated by the movement of the suspension mechanism is measured at this force measuring position. This allows the force generated by the movement of the suspension mechanism to be obtained from a position closer to the suspension mechanism, which is beneficial to improving the response speed of the force measurement.

[0027] In one embodiment, the output of the active stabilizer bar can be, for example, an output rocker arm. In another embodiment, the suspension mechanism can include a suspension control arm and a shock absorber. In yet another embodiment, force measurement can be achieved by placing a force sensor at the force measurement location, as will be explained in subsequent steps.

[0028] According to the active stabilizer bar output force control method provided in this application embodiment, the step of selecting the force measuring position between the output unit and the suspension mechanism includes: selecting the force measuring position on the force transmission component. This avoids the need to add other connecting components between the output unit and the suspension mechanism, reducing the complexity of component setup.

[0029] According to the active stabilizer bar output force control method provided in the embodiments of this application, the step of selecting the force measuring position between the output part and the suspension mechanism may further include: as described above, setting a force sensor at the force measuring position, wherein the force sensor is part of the force transmission component, that is, the force sensor participates in the force transmission and serves as a direct force measuring element, which makes the force transmission component more compact and also helps to simplify the force measuring process.

[0030] According to the active stabilizer bar output force control method provided in the embodiments of this application, the step of selecting the force measuring position between the output unit and the suspension mechanism may further include: The force sensor is configured as a tension / compression sensor, which has a first force-bearing surface and a second force-bearing surface opposite to each other. The force transmission component includes a first tie rod and a second tie rod, with the first tie rod disposed on the first force-bearing surface and the second tie rod disposed on the second force-bearing surface. In this embodiment, the first tie rod is connected to the suspension mechanism, and the second tie rod is connected to the output unit.

[0031] In this embodiment, the first and second pull rods can both be ball-head pull rods, and the first and second pull rods, together with the tension and compression sensor connected between them, essentially form a stabilizing pull rod.

[0032] According to the active stabilizer bar output force control method provided in the embodiments of this application, the step of selecting the force measuring position between the output unit and the suspension mechanism may further include: A protective housing is disposed on the outside of the force sensor, completely enclosing it. This protects the force sensor from damage under harsh operating conditions. For example, the housing may consist of two parts connected by clips or screws, with openings on opposite sides to allow the first and second pull rods to pass through.

[0033] According to the active stabilizer bar output force control method provided in the embodiments of this application, the output force control method may further include: configuring the wiring harness of the force sensor and the wiring harness of the active stabilizer bar to be connected to the same control unit, thereby further simplifying the wiring harness arrangement. That is, the signal wiring harness of the tension / compression sensor and the control wiring harness of the active stabilizer bar can be connected together to the control unit of the active stabilizer bar.

[0034] According to a second aspect of the embodiments of this application, a force transmission component is provided. The force transmission component connects the output of an active stabilizer bar to the vehicle's suspension mechanism. The force transmission component can be the force transmission component mentioned above and has the same beneficial effects. Its structure will be briefly described again here. The force transmission component includes a force sensor, a first tie rod, and a second tie rod. The force sensor has a first force-bearing surface and a second force-bearing surface that are opposite to each other. The first tie rod is disposed on the first force-bearing surface, and the second tie rod is disposed on the second force-bearing surface. The first tie rod is connected to the suspension mechanism, and the second tie rod is connected to the output. The force sensor is used to acquire the force generated on the force sensor by the movement of the suspension mechanism.

[0035] As described above, as an example, the force sensor is a tension / compression sensor. As described above, as an example, the force transmission assembly also includes a protective housing that completely houses the force sensor. As an example, the protective housing may be, for instance, two parts connected by snaps or screws, with openings on opposite sides of the housing to allow the first and second pull rods to pass through.

[0036] In this embodiment, the first and second pull rods can both be ball-head pull rods, and the first and second pull rods, together with the tension and compression sensor connected between them, essentially form a stabilizing pull rod.

[0037] Based on the technical solutions described above, more specific examples will be listed below.

[0038] To address the shortcomings of torque sensor-based torque detection methods, this application proposes a method using tension / compression sensors. The principle involves attaching a ball-end tie rod to each end of the tension / compression sensor, forming a complete stabilizer bar tie rod. One end of this stabilizer bar tie rod is connected to the output rocker arm of the active stabilizer bar or the end of the active rocker arm, while the other end is connected to the suspension rocker arm or shock absorber.

[0039] In this embodiment, when the suspension moves, it drives the control arm or shock absorber to move. The force generated by this movement is directly transmitted to the tension / compression sensor. The tension / compression sensor directly detects the tension or compression on the stabilizer bar tie rod and outputs it to the controller of the active stabilizer bar. The controller of the active stabilizer bar directly outputs the corresponding force signal. After receiving the signal, the motor outputs torque to the stabilizer bar tie rod, thus achieving a balance between the two forces. Simultaneously, considering that the tie rod is a suspension component and operates in a harsh environment, a snap-on, detachable sensor protective shell is added to protect the sensor portion.

[0040] The installation process for the stabilizer bar tie rod and tension / compression sensor is as follows: Take two ball-end tie rods and screw a hexagonal lock nut into the threaded part of each ball-end tie rod, exposing an appropriate length of thread for the next step of installation. Screw the threads of the ball joint rods with nuts installed into the threaded holes at both ends of the tension / compression sensor. Adjust the orientation of the ball joints of the two rods according to the assembly requirements. Tighten the hexagonal lock nut, paying attention to the force reading displayed on the tension / compression sensor while tightening, ensuring it reads 0; Attach the sensor protective cover to the outside of the tension / compression sensor; The tension / compression sensor signal harness and the active stabilizer bar harness are connected together to the active stabilizer bar control unit to complete the installation of the stabilizer bar tension rod.

[0041] According to the active stabilizer bar output force control method provided in this application, a tension / compression sensor is used instead of the existing torque sensor solution. From an installation perspective, simply connecting the bolt holes at both ends of the tension / compression sensor to the stabilizer bar tie rod end allows for high-precision detection of the force transmitted from the suspension arms to the active stabilizer bar rocker arm, and the signal can be directly output to the active stabilizer bar actuator. From a research and development perspective, the solution using tension / compression sensors only requires the purchase of the sensors themselves, resulting in lower costs compared to the torque sensor solution. In terms of later maintenance costs, the tension / compression sensor solution is easier and cheaper to maintain; functionally, the tension / compression sensor theoretically has a faster and more direct response time. In short, using tension / compression sensors significantly reduces production costs, research and development costs, and maintenance costs.

[0042] According to a third aspect of the embodiments of this application, a vehicle is provided that executes the above-described active stabilizer bar output force control method, and the vehicle includes the above-described force transmission component; or the vehicle executes the above-described active stabilizer bar output force control method; or the vehicle includes the above-described force transmission component. Furthermore, the vehicle includes a control unit for the above-described active stabilizer bar, the control unit for receiving a signal of a first force and controlling the active stabilizer bar to output a second force at a force-measuring position to balance the first force.

[0043] The above are merely preferred embodiments of this application and do not limit the scope of protection of this application. Any equivalent structural transformations made based on the innovative concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A method for controlling the output force of an active stabilizer bar, characterized in that, The active stabilizer bar includes an output section, which is connected to the vehicle's suspension mechanism via a force transmission component. The output force control method includes: A force measuring position is selected between the output section and the suspension mechanism; Acquire a first force from the force measuring position, generated by the motion of the suspension mechanism; In response to the first force obtained from the force measuring position, the output of the active stabilizer is controlled to apply force to generate a second force at the force measuring position to balance the first force.

2. The output force control method according to claim 1, characterized in that, Selecting the force measuring position between the output section and the suspension mechanism includes selecting the force measuring position on the force transmission component.

3. The output force control method according to claim 2, characterized in that, The step of selecting a force measuring position between the output section and the suspension mechanism further includes: setting a force sensor at the force measuring position, wherein the force sensor is part of the force transmission component.

4. The output force control method according to claim 3, characterized in that, The step of selecting the force measuring position between the output section and the suspension mechanism further includes: The force sensor is configured as a tension / compression sensor, which has a first force-bearing surface and a second force-bearing surface opposite to each other. The force transmission assembly is configured with a first pull rod and a second pull rod, the first pull rod being disposed on the first force-bearing surface and the second pull rod being disposed on the second force-bearing surface. The first tie rod is connected to the suspension mechanism, and the second tie rod is connected to the output unit.

5. The output force control method according to claim 3, characterized in that, The step of selecting the force measuring position between the output section and the suspension mechanism further includes: A protective shell is disposed on the outside of the force sensor, wherein the protective shell completely encloses the force sensor.

6. The output force control method according to claim 3, characterized in that, The output force control method further includes: The wiring harness of the force sensor and the wiring harness of the active stabilizer are connected to the same control unit.

7. A force transmission component, characterized in that, The force transmission component connects the output of the active stabilizer bar to the vehicle's suspension mechanism, and the force transmission component includes: A force sensor having a first force-receiving surface and a second force-receiving surface that are opposite to each other; A first tie rod and a second tie rod, wherein the first tie rod is disposed on the first force-bearing surface and the second tie rod is disposed on the second force-bearing surface; the first tie rod is connected to the suspension mechanism and the second tie rod is connected to the output part; The force sensor is used to acquire the force generated on the force sensor by the movement of the suspension mechanism.

8. The output force control method according to claim 7, characterized in that, The force sensor is a tension / compression sensor.

9. The output force control method according to claim 7, characterized in that, The force transmission component also includes a protective housing that completely encloses the force sensor.

10. A vehicle, characterized in that, The vehicle performs the output force control method of the active stabilizer bar as described in any one of claims 1 to 6, and / or the vehicle includes the force transmission components as described in claims 7 to 9.

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