LU503964B1

LU503964B1 - Accelerator pedal and method for controlling accelerator pedal

Info

Publication number: LU503964B1
Application number: LU503964A
Authority: LU
Inventors: Haijun Zhang
Original assignee: Univ Hubei Arts & Science
Priority date: 2022-04-18
Filing date: 2023-02-20
Publication date: 2024-02-20
Also published as: WO2023202201A1; LU503964A1; CN114670623A; CN114670623B

Abstract

Disclosed are an accelerator pedal and a method for controlling the accelerator pedal. The accelerator pedal includes a base, a pedal, an electromagnetic limiting device, a sensing device and a control device. One end of the pedal is rotatably installed on the base, and the electromagnetic limiting device is provided between the pedal and the base. The electromagnetic limiting device has a limiting state for hindering movements of the pedal when the electromagnetic limiting device is powered on. The sensing device is configured to sense a pressure value on the pedal, to send a limiting signal when the pressure value is greater than a preset pressure value. The control device is configured to control the electromagnetic limiting device to work when the control device receives the limiting signal.

Description

ACCELERATOR PEDAL AND METHOD FOR CONTROLLING 203964

ACCELERATOR PEDAL

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202210419993.0, filed on April 18, 2022.

TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of accelerator pedals, in particular to an accelerator pedal and a method for controlling the accelerator pedal.

BACKGROUND

[0003] Inside the vehicle cabin, both the accelerator pedal and the brake pedal are controlled by the driver’s right foot. The accelerator pedal, which is very close to the brake pedal, is likely to be stepped on by mistake in an emergency, thereby causing an accident.

Especially in the case of complex road conditions, or sudden braking and deceleration, limited by the driving skill, the driver is prone to panic, inattention, etc.. In this case, the driver is likely to step on the accelerator pedal as a brake pedal and increase the speed of the vehicle instantly, thereby resulting in a serious traffic accident and great loss of life and property.

[0004] At present, some accelerator pedals already have a design to prevent misstepping.

However, in the existing accelerator pedals, it is generally judged whether the driver steppes on the accelerator pedal by mistake. When it is judged that the accelerator pedal is steeped on by mistake, the accelerator pedal will directly fail, which makes it impossible for the driver to take the initiative to correct the misjudgment, resulting in certain safety risks when a misjudgment occurs.

SUMMARY

[0005] The main purpose of the present disclosure is to provide an accelerator pedal and a method for controlling the accelerator pedal, aiming to solve the problem that when a misjudgment occurs in the conventional accelerator pedal, the driver cannot take the initiative to correct the misjudgment, resulting in certain safety risks.

[0006] In order to achieve the above objectives, the present disclosure provides an accelerator pedal including:

[0007] a base;

[0008] a pedal, one end of the pedal is rotatably installed on the base along a direction close to the base or away from the base, the pedal is configured for being stepped on, and the pedal is configured to rotate toward the base when being stepped on;

[0009] an electromagnetic limiting device provided between the pedal and the base, the electromagnetic limiting device has a limiting state for hindering movements of the pedal whés505964 the electromagnetic limiting device is powered on;

[0010] a sensing device provided on the pedal, the sensing device is configured to sense a pressure value on the pedal, to send a limiting signal when the pressure value is greater than a preset pressure value; and

[0011] a control device electrically connected to the sensing device and the electromagnetic limiting device respectively, the control device is configured to control the electromagnetic limiting device to work when the control device receives the limiting signal.

[0012] In an embodiment, the electromagnetic limiting device includes:

[0013] a cylinder block extending from the base toward the pedal, an installation cavity is provided inside the cylinder block;

[0014] a connecting rod, an end of the connecting rod is installed on the pedal, and another end of the connecting rod extends into the installation cavity;

[0015] a working piston installed on the end of the connecting rod extending into the installation cavity, the working piston is slidably installed in the installation cavity; and

[0016] an electromagnetic limiting component installed in the installation cavity, the electromagnetic limiting component is electrically connected to a power supply, to hinder movements of the working piston when the electromagnetic limiting component is powered on.

[0017] In an embodiment, the installation cavity includes a main cavity provided on a side of the working piston relative to the connecting rod, and the main cavity is configured to hold a magnetorheological fluid, the working piston is made of a magnetic conductive material, and a middle part of the working piston is provided with an annular groove, and the electromagnetic limiting component includes a coil provided around the annular groove, and the coil is configured to condense and solidify the magnetorheological fluid when the coil is powered on.

[0018] In an embodiment, the electromagnetic limiting component further includes an annular magnet yoke provided in the annular groove, the annular magnet yoke is provided in a middle part of the annular groove to divide the annular groove into two installation grooves, and a number of the coil is two, and two coils are respectively provided in the two installation grooves.

[0019] In an embodiment, the pedal has an initial position away from the base during a rotation of the pedal; and the electromagnetic limiting device further includes a reset component provided in the installation cavity, and the reset component is configured to push the working piston to reset the pedal to the initial position when the pedal 1s not stepped on.

[0020] In an embodiment, the installation cavity includes the main cavity provided on the side of the working piston relative to the connecting rod; the reset component includes 4503964 floating piston provided in the main cavity; and the floating piston is configured to divide the main cavity into two parts, a part close to the working piston is a working cavity, and another part away from the working piston is a resetting cavity.

[0021] In an embodiment, an installing rod is provided on a side of the pedal facing the base, and the installing rod 1s provided along a same direction as a rotation axis of the pedal; and an end of the connecting rod close to the pedal is provided with a lantern ring, and the lantern ring is sleeved outside the installation rod to make the installation rod slide in the lantern ring when the pedal rotates.

[0022] The present disclosure further provides a method for controlling the accelerator pedal as mentioned above, the method includes following operations:

[0023] obtaining the pressure value on the pedal; and

[0024] controlling the electromagnetic limiting device to work according to the pressure value.

[0025] In an embodiment, the operation of controlling the electromagnetic limiting device to work according to the pressure value includes:

[0026] controlling the electromagnetic limiting device to enter a limiting state to hinder movements of the pedal when the pressure value 1s greater than the preset pressure value.

[0027] In an embodiment, the electromagnetic limiting device includes the cylinder block, the working piston provided in the cylinder block, the coil and the connecting rod, two ends of the connecting rod are respectively connected to the piston and the base, and the cylinder block is configured to hold the magnetorheological fluid, and when the pressure value is greater than the preset pressure value, the operation of controlling the electromagnetic limiting device to enter the limit state to hinder movements of the pedal includes:

[0028] when the pressure value is greater than the preset pressure value, controlling the coil to be powered on, to condense and solidify the magnetorheological fluid.

[0029] In the technical solution of the present disclosure, the pressure on the pedal is sensed by the sensing device. When the pressure value is greater than the preset pressure value, it means that the driver is excited when stepping on the accelerator pedal, which also means that the pedal is most likely to be stepped on by mistake. In this case, the limiting signal will be sent by the sensing device. In the present disclosure, the control device does not directly disable the pedal when receiving the limiting signal, but controls the electromagnetic limiting device to be powered on, thereby hindering the movements of the pedal. In this case, a resistance is fed back to the driver, so that the driver can know in time that the current use of the pedal is not standardized, and it is necessary to reduce the stepping pressure or use the brake pedal instead LU503964

[0030] It should be noted that the electromagnetic limiting device will make the driver unable to step on the pedal, so that the driver can quickly know the mistakes of his own operation and then correct the operation mistakes. Moreover, when the driver intentionally reduces the stepping pressure on the pedal, the pressure value sensed by the sensing device will decrease accordingly. When the pressure value is less than the preset pressure value, the sensing device will no longer send the limiting signal, and the control device will also control the electromagnetic limiting device not to limit the pedal, so that the accelerator pedal can work normally.

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To illustrate the technical solutions according to the embodiments of the present disclosure or the related art more clearly, the accompanying drawings for describing the embodiments or the related art are introduced briefly in the following. Apparently, the accompanying drawings in the following description are only some embodiments of the present disclosure. Persons of ordinary skill in the art can derive other drawings from the structures of the accompanying drawings without creative efforts.

[0032] FIG. 1 is a schematic structural view of an accelerator pedal according to an embodiment of the present disclosure.

[0033] FIG. 2 is a schematic sectional view of an electromagnetic limiting device in FIG. 1.

[0034] FIG. 3 is a schematic structural view of a pedal according to an embodiment in FIG. 1.

[0035] FIG. 4 is a schematic structural diagram of a control device under a hardware operating environment according to an embodiment in FIG. 1.

[0036] FIG. 5 is a schematic flowchart of a method for controlling the accelerator pedal according to an embodiment of the present disclosure.

[0037] Description of reference numbers:

Reference Reference

Ce | em

[0038] The realization of the objective, functional characteristics, and advantages of the present disclosure are further described with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The technical solutions of the embodiments of the present disclosure will be 5 described clearly in the following with reference to the accompanying drawings. It is obvious that the embodiments described are only some rather than all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of the present disclosure.

[0040] It should be noted that all the directional indications in the embodiments of the present disclosure are only used to explain the relative positional relationship, movement, or the like of the components in a certain posture. If the specific posture changes, the directional indication will change accordingly.

[0041] Besides, the descriptions associated with, e.g., “first” and “second”, in the present disclosure are merely for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or impliedly indicating the number of the indicated technical feature. Therefore, the feature associated with “first” and “second” can expressly or impliedly include at least one such feature. In addition, the technical solutions of the various embodiments can be combined with each other, but the combinations must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist, nor does it fall within the scope of the present disclosure.

[0042] Inside the vehicle cabin, both the accelerator pedal and the brake pedal are controlled by the driver’s right foot. The accelerator pedal, which is very close to the brake pedal, is likely to be stepped on by mistake in an emergency, thereby causing an accident.

Especially in the case of complex road conditions, or sudden braking and deceleration, limited by the driving skill, the driver is prone to panic, inattention, etc.. In this case, the driver is likely to step on the accelerator pedal as a brake pedal and increase the speed of the vehicle instantly,

thereby resulting in a serious traffic accident and great loss of life and property. LUS03964

[0043] At present, some accelerator pedals already have a design to prevent misstepping.

[0044] In view of this, the present disclosure provides an accelerator pedal, aiming to solve the problem that when a misjudgment occurs in the conventional accelerator pedal, the driver cannot take the initiative to correct the misjudgment, resulting in certain safety risks. FIGS. 1 to 3 show an accelerator pedal in an embodiment of the present disclosure.

[0045] As shown in FIG. 1 to FIG. 3, the accelerator pedal 100 provided in the present disclosure includes a base 1, a pedal 2, an electromagnetic limiting device 3, a sensing device and a control device. One end of the pedal 2 is rotatably installed on the base 1 along a direction close to the base 1 or away from the base 1. The pedal 2 is configured for being stepped on, and the pedal 2 is configured to rotate toward the base 1 when being stepped on. The electromagnetic limiting device 3 is provided between the pedal 2 and the base 1. The electromagnetic limiting device 3 has a limiting state for hindering movements of the pedal 2 when the electromagnetic limiting device 3 is powered on. The sensing device is provided on the pedal 2, and the sensing device is configured to sense a pressure value on the pedal 2, to send a limiting signal when the pressure value is greater than a preset pressure value. The control device is electrically connected to the sensing device and the electromagnetic limiting device 3 respectively. The control device is configured to control the electromagnetic limiting device 3 to work when the control device receives the limiting signal.

[0046] In the technical solution of the present disclosure, the pressure on the pedal 2 is sensed by the sensing device. When the pressure value is greater than the preset pressure value, it means that the driver is excited when stepping on the accelerator pedal 100, which also means that the pedal 2 is most likely to be stepped on by mistake. In this case, the limiting signal will be sent by the sensing device. In the present disclosure, the control device does not directly disable the pedal 2 when receiving the limiting signal, but controls the electromagnetic limiting device 3 to be powered on, thereby hindering the movements of the pedal 2. In this case, a resistance is fed back to the driver, so that the driver can know in time that the current use of the pedal 2 is not standardized, and it is necessary to reduce the stepping pressure or use the brake pedal 2 instead.

[0047] The electromagnetic limiting device 3 will make the driver unable to step on th&/503964 pedal 2, so that the driver can quickly know the mistakes of his own operation and then correct the operation mistakes. Moreover, when the driver intentionally reduces the stepping pressure on the pedal 2, the pressure value sensed by the sensing device will decrease accordingly. When the pressure value is less than the preset pressure value, the sensing device will no longer send the limiting signal, and the control device will also control the electromagnetic limiting device 3 not to limit the pedal 2, so that the accelerator pedal 100 can work normally.

[0048] The sensing device includes a pressure sensor for sensing the pressure on the pedal 2, but not only includes the pressure sensor. The sensing device may also include a vibration sensor. The vibration sensor can sense the vibration of the vehicle body, to send vibration signals of different frequencies according to the vibration of the vehicle body. After the control device receives the vibration signal, the electromagnetic limiting device 3 can be controlled to apply different resistances to the pedal 2 according to the frequency of the vibration signal.

Different resistances can remind the driver to control the vehicle speed within the safe driving speed according to current road conditions. The sensing device can also include other sensors, which can be adjusted according to actual requirements.

[0049] In an embodiment, as shown in FIG. 1 and FIG. 2, the electromagnetic limiting device 3 includes a cylinder block 31, a connecting rod 32, a working piston 33 and an electromagnetic limiting component. The cylinder block 31 extends from the base 1 toward the pedal 2, and an installation cavity 311 is provided inside the cylinder block 31. An end of the connecting rod 32 is installed on the pedal 2, and the other end of the connecting rod 32 extends into the installation cavity 311. The working piston 33 is installed on the end of the connecting rod 32 extending into the installation cavity 311, and the working piston 33 is slidably installed in the installation cavity 311. The electromagnetic limiting component is installed in the installation cavity 311, and the electromagnetic limiting component is electrically connected to a power supply, to hinder movements of the working piston 33 when the electromagnetic limiting component is powered on.

[0050] In this embodiment, the electromagnetic limiting device 3 can hinder movements of the working piston 33 through the electromagnetic limiting component, which makes the connecting rod 32 unable to move toward the base 1, and also limits the rotation of the pedal 2 toward the base 1. It should be noted that the connecting rod 32 and the working piston 33 are installed in the installation cavity 311 of the cylinder block 31. In this case, the working piston 33 cannot bypass the electromagnetic limiting component and continue to move when the working piston 33 is under pressure and the electromagnetic limiting component is powered on.

[0051] As shown in FIG. 2, the installation cavity 311 includes a main cavity 3111 providdd/503964 on a side of the working piston 33 relative to the connecting rod 32, and the main cavity 3111 is configured to hold a magnetorheological fluid. The working piston 33 is made of a magnetic conductive material, and a middle part of the working piston 33 is provided with an annular groove 331. The electromagnetic limiting component includes a coil 34 provided around the annular groove 331, and the coil 34 is configured to condense and solidify the magnetorheological fluid when the coil 34 is powered on.

[0052] In this embodiment, the working piston 33 actually divides the installation cavity 311, and the side of the working piston 33 relative to the connecting rod 32 is provided with a main cavity 3111. When the electromagnetic limiting component is powered on, the movement of the working piston 33 in the main cavity 3111 can be limited. The specific limiting method of the electromagnetic limiting component is to fill the main cavity 3111 with the magnetorheological fluid, and the electromagnetic limiting component further includes the coil 34 provided around the annular groove 331, which enables the working piston 33 to obtain magnetic force through electromagnetic force of the coil 34 after the coil 34 is powered on.

Therefore, a magnetic field can be generated. The magnetorheological fluid in the magnetic field will change from liquid to solid, thereby hindering the movement of the working piston 33 in the main cavity 3111.

[0053] The electromagnetic limiting component may also limit the working piston 33 in other ways. For example, the electromagnetic limiting component can be an electromagnet, and the electromagnet is provided at the working piston 33. When the electromagnet is powered on, the working piston 33 will be adsorbed on the side wall of the cylinder block 31, thereby limiting continued movements of the pedal 2. Therefore, there is not only one specific implementation manner of the electromagnetic limiting component, but certain adjustments can be made according to the specific usage conditions. It should be noted that the magnetorheological fluid has different viscosities according to the intensity of the magnetic field, and the resistance of the magnetorheological fluid to the working piston 33 can be adjusted by changing the current intensity of the coil 34, to meet a variety of usage requirements.

[0054] In addition, when the coil 34 is not powered on, the magnetorheological fluid isin a liquid-like state. At this time, when the driver steps on the pedal 2, the pedal 2 can move normally, and the magnetorheological fluid still makes the pedal 2 move with a small damping, that is, a permanent damping. When the vehicle is running normally, the permanent damping can be felt every time the driver steps on the pedal 2, which actually keeps reminding the driver that the accelerator pedal 100 is being stepped on and helps the driver distinguish thé/503964 accelerator pedal 100 from the brake pedal 2, thereby reducing the misstepping on the pedal 2.

[0055] In an embodiment, the electromagnetic limiting component further includes an installation groove 35 provided in the annular groove 331, and the installation groove 35 is provided in a middle part of the annular groove 331 to divide the annular groove 331 into two installation grooves 331a. The number of the coil 34 is two, and two coils 34 are respectively provided in the two installation grooves 33 1a.

[0056] In this embodiment, the installation groove 35 is provided in the middle of the annular groove 331. That is, the installation groove 35 is provided between the two coils 34, thereby separating the electromagnetic field generated by the two coils 34 and strengthening the magnetic field strength in the installation cavity 311. In this way, without too high voltages, the two coils 34 can still make the magnetorheological fluid more viscous, and the resistance to the working piston 33 can be greater, thereby reducing the usage consumption.

[0057] In an embodiment, as shown in FIG. 2, in the specific application of the accelerator pedal 100, the pedal 2 needs to rotate repeatedly along the direction of close to the base 1 and away from the base 1. In this case, the vehicle will accelerate when the pedal 2 is close to the base 1, and the vehicle will not accelerate when the pedal 2 is away from the base 1.

Therefore, the pedal 2 needs a reset component 36 to reset the pedal 2 to the initial position, which is convenient for the subsequent use of the pedal 2. In an embodiment of the present disclosure, the pedal 2 has an initial position away from the base 1 during the rotation of the pedal 2, and the electromagnetic limiting device 3 further includes a reset component 36. The reset component 36 is provided on the installation cavity 311, and the reset component 36 is configured to push the working piston 33 to reset the pedal 2 to the initial position when the pedal 2 is not stepped on.

[0058] In this embodiment, under pressure, the pedal 2 will move from the initial position toward the base 1, and the reset component 36 will be pushed by the pedal 2 to move together.

After pushed, the reset component 36 may exert a certain force on the pedal 2, so that the pedal 2 may move along a direction away from the base 1 when not under a pressure, thereby finishing resetting.

[0059] In an embodiment, the installation cavity 311 includes a main cavity 3111 provided on a side of the working piston 33 relative to the connecting rod 32. The reset component 36 includes a floating piston 361 provided in the main cavity 3111, and the floating piston 361 is configured to divide the main cavity 3111 into two parts. A part close to the working piston 33 is the working cavity 3111a, and the other part away from the working piston 33 is the resetting cavity 3111b. LU503964

[0060] In this embodiment, the floating piston 361 1s provided between the working cavity 3111a and the resetting cavity 3111b. When the pedal 2 rotates toward the base 1, the working piston 33 will push the floating piston 361 to move, which not only makes the gas in the resetting cavity 3111b compressed by the floating piston 361, but also makes the air pressure in the resetting cavity 3111b increased. When the working piston 33 no longer pushes the floating piston 361, under the air pressure, the floating piston 361 will be pushed back to reset the pedal 2.

[0061] As for the reset component 36, the reset member is not implemented only by the floating piston 361. The reset component 36 can also be an elastic component, such as a spring.

The spring will be compressed when the working piston 33 moves toward the resetting cavity 3111b. When the working piston 33 no longer pushes the spring, under the elastic force, the spring will push back the working piston 33, so that the pedal 2 can be reset.

[0062] In an embodiment, as shown in FIG. 1 and FIG. 2, when the pedal 2 moves toward the base 1, the pedal 2 will drive the connecting rod 32 to move together. The movement of the pedal 2 is rotation, so when the pedal 2 and the connecting rod 32 are connected in a conventional manner, the connecting rod 32 will rotate with the pedal 2, which will greatly limit the movement of the connecting rod 32. Therefore, in an embodiment of the present disclosure, an installing rod 21 is provided on a side of the pedal 2 facing the base 1, and the installing rod 21 1s provided along a same direction as a rotation axis of the pedal 2. An end of the connecting rod 32 close to the pedal 2 is provided with a lantern ring 321, and the lantern ring 321 is sleeved outside the installation rod to make the installation rod slide in the lantern ring 321 when the pedal 2 rotates.

[0063] In this embodiment, when the pedal 2 rotates, the installation rod will rotate in the lantern ring 321, so that the pedal 2 can rotate relative to the connecting rod 32. But when the pedal 2 rotate toward the base 1, the pedal 2 will push the connecting rod 32, so that the connecting rod 32 may push the working piston 33 to move. In the technical solution of this embodiment, the pedal 2 and the connecting rod 32 can move relative to each other through the lantern ring 321 and the installing rod 21, so that the connecting rod 32 can move more freely.

[0064] In the present disclosure, as shown in FIG. 4, the accelerator pedal 100 includes a control device. The control device is electrically connected to the sensing device and the electromagnetic limiting device 3 respectively, to control the pedal 2.

[0065] The control device may include a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is configured to realize connection add/505964 communication between these components. The user interface 1003 may include a display, an input unit such as a keyboard. The user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may include a standard wired interface and a wireless interface (such as the Wireless Fidelity interface). The memory 1005 may be a high-speed random access memory (RAM), or a non-volatile memory, such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0066] As shown in FIG. 4, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module and a control program of the accelerator pedal 100.

[0067] As shown in FIG. 4, in the control device, the processor 1001 may call the control program of the accelerator pedal 100 stored in the memory 1005, and performs the following operations.

[0068] Obtaining the pressure value on the pedal 2.

[0069] Controlling the electromagnetic limiting device 3 to work according to the pressure value.

[0070] In an embodiment, the processor 1001 may call the control program of the accelerator pedal 100 stored in the memory 1005, and further performs the following operations.

[0071] Controlling the electromagnetic limiting device 3 to enter a limiting state to hinder movements of the pedal 2 when the pressure value 1s greater than the preset pressure value.

[0072] In an embodiment, the processor 1001 may call the control program of the accelerator pedal 100 stored in the memory 1005, and further performs the following operations.

[0073] When the pressure value 1s greater than the preset pressure value, controlling the coil 34 to be powered on, to condense and solidify the magnetorheological fluid.

[0074] Based on the above hardware structure, the present disclosure provides a control method for controlling the accelerator pedal 100.

[0075] In the method for controlling the accelerator pedal 100, the pressure value on the pedal 2 is sensed by the sensing device, and whether the pedal 2 is stepped on by mistake 1s judged according to the pressure value.

[0076] FIG. 5 is a schematic flowchart of the method for controlling the accelerator pedal 100 control according to an embodiment of the present disclosure.

[0077] S10, obtaining the pressure value on the pedal 2. LU503964

[0078] S20, controlling the electromagnetic limiting device 3 to work according to the pressure value.

[0079] In this embodiment, the control device obtains the pressure value on the pedal 2 through the sensing device, and judges whether the pedal 2 is stepped on by mistake according to the pressure value. When it is judged that the pedal 2 is stepped on by mistake, the control device controls the electromagnetic limiting device 3 to limit the pedal 2, thereby limiting the use of the accelerator pedal 100. When it is judged that the pedal 2 is stepped on normally, the control device does not control the electromagnetic limiting device 3 to limit the pedal 2, so that the accelerator pedal 100 can be used normally.

[0080] Operation S20 includes:

[0081] S21: controlling the electromagnetic limiting device 3 to enter a limiting state to hinder movements of the pedal 2 when the pressure value is greater than the preset pressure value.

[0082] In this embodiment, a preset pressure value is preset in the database of the control device. When a pressure value is sensed by the sensing device in real time, the pressure value will be compared with the preset pressure value. When the pressure value is greater than the preset pressure value, a limiting signal is sent by the sensing device, and the control device will control the electromagnetic limiting device 3 to limit the pedal 2, thereby limiting the use of the accelerator pedal 100. When the pressure value is less than or equal to the preset pressure value, the sensing device will not send a limiting signal, and the control device will not control the electromagnetic limiting device 3 to limit the pedal 2, so that the accelerator pedal 100 can be used normally.

[0083] The preset pressure value can be adjusted adaptively according to the driver's physical quality and usage requirements, which will not be limited thereto.

[0084] The electromagnetic limiting device 3 includes a cylinder block 31, a working piston 33 provided in the cylinder block 31, a coil 34 and a connecting rod 32. Two ends of the connecting rod 32 are respectively connected to the piston and the base 1, and the cylinder block 31 is configured to hold the magnetorheological fluid. Operation S21 includes:

[0085] S211: when the pressure value is greater than the preset pressure value, controlling the coil 34 to be powered on, to condense and solidify the magnetorheological fluid.

[0086] In this embodiment, when powered on, the electromagnetic coil 34 may generate an electromagnetic field. The electromagnetic field can increase the viscosity of the magnetorheological fluid, thereby converting the magnetorheological fluid from liquid to solid.

When the magnetorheological fluid is a solid, the cylinder block 31 will be blocked, so that thé/503964 working piston 33 in the cylinder block 31 cannot continue to move. Therefore, when the pressure value is greater than the preset pressure value, the sensing device will send a limiting signal, and the control device only needs to control the coil 34 to be powered on, thereby generating an electromagnetic field in the cylinder block 31.

[0087] The above are only some embodiments of the present disclosure, and do not limit the scope of the present disclosure thereto. Under the inventive concept of the present disclosure, any equivalent mechanism transformation made according to the description and drawings of the present disclosure, or direct/indirect application in other related technical fields fall within the scope of the present disclosure.

Claims

CLAIMS LU503964

1. An accelerator pedal, comprising: a base: a pedal, wherein one end of the pedal 1s rotatably installed on the base along a direction close to the base or away from the base, the pedal 1s configured for being stepped on, and the pedal is configured to rotate toward the base when being stepped on; an electromagnetic limiting device provided between the pedal and the base, wherein the electromagnetic limiting device has a limiting state for hindering movements of the pedal when the electromagnetic limiting device is powered on; a sensing device provided on the pedal, wherein the sensing device is configured to sense a pressure value on the pedal, to send a limiting signal when the pressure value is greater than a preset pressure value; and a control device electrically connected to the sensing device and the electromagnetic limiting device respectively, wherein the control device is configured to control the electromagnetic limiting device to work when the control device receives the limiting signal.

2. The accelerator pedal of claim 1, wherein the electromagnetic limiting device comprises: a cylinder block extending from the base toward the pedal, wherein an installation cavity is provided inside the cylinder block; a connecting rod, wherein an end of the connecting rod is installed on the pedal, and another end of the connecting rod extends into the installation cavity; a working piston installed on the end of the connecting rod extending into the installation cavity, wherein the working piston is slidably installed in the installation cavity; and an electromagnetic limiting component installed in the installation cavity, wherein the electromagnetic limiting component is electrically connected to a power supply, to hinder movements of the working piston when the electromagnetic limiting component is powered on.

3. The accelerator pedal of claim 2, wherein: the installation cavity comprises a main cavity provided on a side of the working piston relative to the connecting rod, and the main cavity is configured to hold a magnetorheological LU503964 fluid, the working piston is made of a magnetic conductive material, and a middle part of the working piston is provided with an annular groove, and the electromagnetic limiting component comprises a coil provided around the annular groove, and the coil is configured to condense and solidify the magnetorheological fluid when the coil is powered on.

4. The accelerator pedal of claim 3, wherein: the electromagnetic limiting component further comprises an annular magnet yoke provided in the annular groove, the annular magnet yoke is provided in a middle part of the annular groove to divide the annular groove into two installation grooves, and a number of the coil is two, and two coils are respectively provided in the two installation grooves.

5. The accelerator pedal of any one of claims 2 to 4, wherein: the pedal has an initial position away from the base during a rotation of the pedal; and the electromagnetic limiting device further comprises a reset component provided in the installation cavity, and the reset component is configured to push the working piston to reset the pedal to the initial position when the pedal is not stepped on.

6. The accelerator pedal of claim 5, wherein: the installation cavity comprises the main cavity provided on the side of the working piston relative to the connecting rod the reset component comprises a floating piston provided in the main cavity; and the floating piston is configured to divide the main cavity into two parts, a part close to the working piston is a working cavity, and another part away from the working piston is a resetting cavity.

7. The accelerator pedal of claim 2, wherein an installing rod is provided on a side of the pedal facing the base, and the installing rod is provided along a same direction as a rotation axis of the pedal; and an end of the connecting rod close to the pedal is provided with a lantern ring, and the lantern ring is sleeved outside the installation rod to make the installation rod slide in the LU508964 lantern ring when the pedal rotates.

8. A method for controlling the accelerator pedal of any one of claims 1 to 7, comprising following operations: obtaining the pressure value on the pedal; and controlling the electromagnetic limiting device to work according to the pressure value.

9. The method for controlling the accelerator pedal of claim 8, wherein the operation of controlling the electromagnetic limiting device to work according to the pressure value comprises: controlling the electromagnetic limiting device to enter a limiting state to hinder movements of the pedal when the pressure value is greater than the preset pressure value.

10. The method for controlling the accelerator pedal of claim 9, wherein: the electromagnetic limiting device comprises the cylinder block, the working piston provided in the cylinder block, the coil and the connecting rod, two ends of the connecting rod are respectively connected to the piston and the base, and the cylinder block 1s configured to hold the magnetorheological fluid, and when the pressure value is greater than the preset pressure value, the operation of controlling the electromagnetic limiting device to enter the limit state to hinder movements of the pedal comprises: when the pressure value 1s greater than the preset pressure value, controlling the coil to be powered on, to condense and solidify the magnetorheological fluid.