WO2023202201A1 - Accelerator pedal and accelerator pedal control method - Google Patents

Abstract

The present application provides an accelerator pedal and an accelerator pedal control method. The accelerator pedal comprises a base, a pedal, an electromagnetic limiting device, a sensing device and a control device, wherein an end of the pedal is rotationally mounted to the base; the electromagnetic limiting device is arranged between the pedal and the base, and upon being energized, the electromagnetic limiting device is in a limiting state for hindering the movement of the pedal; the sensing device is used for sensing the pressure on the pedal, so as to send a limiting signal when the pressure is greater than a preset pressure value; and the control device is used for controlling, upon receiving the limiting signal, the electromagnetic limiting device to operate.

Description

Accelerator pedal and accelerator pedal control method

This application claims priority to the Chinese patent application with application number 202210419993.0 filed on April 18, 2022.

Technical field

The present application relates to the technical field of accelerator pedals, and specifically relates to an accelerator pedal and a control method of the accelerator pedal.

Background technique

In the vehicle cab, the accelerator pedal and brake pedal are both controlled by the driver's right foot. They are very close to each other. In an emergency, it is easy to accidentally press the accelerator, causing an accident. Especially when encountering complex road conditions and requiring sudden braking and deceleration, the driver may panic and lose concentration due to limited driving skills. It is easy for the driver to mistake the accelerator pedal for the brake pedal and accidentally press the accelerator. The vehicle speed increases instantly, causing serious car accidents and causing loss of life and property.

At present, some accelerator pedals are designed to prevent accidental depression. However, existing accelerator pedals generally judge whether the driver has accidentally depressed the pedal. When it is determined that the driver has accidentally depressed the pedal, the accelerator pedal will be directly disabled, which makes the driver unable to take the initiative to correct it. , leading to certain safety hazards when misjudgment occurs.

technical problem

The main purpose of this application is to propose an accelerator pedal and a control method of the accelerator pedal, aiming to solve the problem that the driver cannot actively correct the traditional accelerator pedal when a misjudgment occurs, thus causing certain safety hazards.

solution

In order to achieve the above purpose, this application proposes an accelerator pedal, which includes:

base;

A pedal, one end of which is rotatably mounted on the base in a direction close to and away from the base. The pedal is used for stepping on and rotates toward the base when stepped on;

An electromagnetic limiting device is provided between the pedal and the base. The electromagnetic limiting device has a limiting state for hindering the movement of the pedal when energized;

A sensing device is provided on the pedal, and the sensing device is used to sense the pressure on the pedal to send a limit signal when the pressure is greater than a preset pressure value; and,

A control device is electrically connected to the sensing device and the electromagnetic limiting device respectively. The control device is used to control the operation of the electromagnetic limiting device when receiving the limiting signal.

In one embodiment, the electromagnetic limiting device includes:

A cylinder extends from the base toward the pedal, and an installation cavity is provided inside the cylinder;

A connecting rod with one end installed on the pedal and the other end extending into the installation cavity;

A working piston is installed at one end of the connecting rod extending into the installation cavity, and the working piston is slidably installed in the installation cavity; and,

An electromagnetic limiter is installed in the installation cavity. The electromagnetic limiter is used to be electrically connected to the power source to hinder the movement of the working piston when power is supplied.

In one embodiment, the installation cavity includes a main body cavity located on the other side of the working piston relative to the connecting rod, and the main body cavity is used to accommodate magnetorheological fluid;

The working piston is made of magnetically conductive material, and an annular groove is provided in the middle of the working piston;

The electromagnetic limiting component includes a coil wound around the annular groove, and the coil is used to condense and solidify the magnetorheological fluid when energized.

In one embodiment, the electromagnetic limiting member further includes an annular yoke disposed in the annular groove, and the annular yoke is disposed in the middle of the annular groove to separate the annular grooves. There are two mounting grooves, two of the coils are provided, and the two coils are respectively arranged in the two mounting grooves.

In one embodiment, the pedal has an initial position away from the base during rotation;

The electromagnetic limiting device also includes a reset piece, which is provided in the installation cavity. The reset piece is used to push the working piston to reset the pedal to the position when the pedal is not stepped on. the initial position.

In one embodiment, the installation cavity includes a body cavity located on the other side of the working piston relative to the connecting rod;

The reset member includes a floating piston located in the main body chamber. The floating piston is used to divide the main body chamber into two parts. The part close to the working piston is the working chamber, and the part far away from the working piston is the working chamber. The part of the working piston is the reset chamber.

In one embodiment, a mounting rod is provided on one side of the pedal facing the base, and the mounting rod is disposed in the same direction as the rotation axis of the pedal;

A collar is provided at one end of the connecting rod close to the pedal, and the collar is sleeved on the mounting rod, so that when the pedal rotates, the mounting rod slides in the collar.

This application also proposes an accelerator pedal control method for controlling the accelerator pedal as described above. The accelerator pedal control method includes the following steps:

Get the pressure value of the pedal;

According to the pressure value, the electromagnetic limiting device is controlled to work.

In one embodiment, the step of controlling the operation of the electromagnetic limiting device according to the pressure value includes:

When the pressure value is greater than the preset pressure value, the electromagnetic limiting device is controlled to enter a limiting state to hinder the movement of the pedal.

In one embodiment, the electromagnetic limiting device includes a cylinder, a working piston located in the cylinder, a coil, and a connecting rod with both ends connected to the piston and the base respectively. The cylinder is used for Contains magnetorheological fluid;

When the pressure value is greater than the preset pressure value, the step of controlling the electromagnetic limiting device to enter a limiting state to hinder the movement of the pedal includes:

When the pressure value is greater than the preset pressure value, the control coil is connected to current, so that the magnetorheological fluid condenses and solidifies.

beneficial effects

In the technical solution of the present application, the pressure on the pedal is sensed by the sensing device. When the pressure is greater than the preset pressure value, it means that the driver is more excited when stepping on the accelerator pedal, which means that the pedal is larger at this time. The probability is that it is stepped on by mistake, in which case the sensing device will send out the limit signal. In this application, when receiving the limit signal, the control device will not directly disable the pedal, but will control the electromagnetic limit device to energize, thus hindering the movement of the pedal and thereby providing feedback to the driver. It creates a resistance so that the driver can know in time that the current use of the pedal is irregular and needs to reduce the pedaling force or use the brake pedal instead.

It should be noted that the electromagnetic limiting device will prevent the driver from stepping on the pedal, thereby allowing the driver to quickly react to his or her operating errors and require adjustment. Moreover, when the driver intentionally reduces the pedal pressure, the pressure sensed by the sensing device will also decrease accordingly. When the pressure is less than the preset pressure value, the pressure The sensing device will no longer send the limit signal, and the control device will also control the electromagnetic limit device to cancel the limit on the pedal, so that the accelerator pedal operates normally.

Description of the drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an embodiment of the accelerator pedal provided by the present application;

Figure 2 is a schematic cross-sectional view of the electromagnetic limiting device in Figure 1;

Figure 3 is a schematic structural diagram of an embodiment of the pedal in Figure 1;

Figure 4 is a schematic structural diagram of a control device for the hardware operating environment involved in the embodiment in Figure 1;

FIG. 5 is a schematic flowchart of an embodiment of the accelerator pedal control method provided by this application.

Explanation of reference numbers:

label	name	label	name
100	Accelerator	1	Base
2	pedal	twenty one	Mounting rod
3	Electromagnetic limit device	31	Cylinder
311	Installation cavity	3111	body chamber
3111a	working chamber	3111b	reset chamber
32	link	321	Collar
33	working piston	331	annular groove
331a	Installation groove	34	Coil
35	Ring yoke	36	Reset piece
361	floating piston

The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that if there are directional indications involved in the embodiments of this application, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture. If the specific posture changes, , the directional indication will also change accordingly.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of this application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and shall not be understood as indications or implications. Its relative importance or implicit indication of the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

In the vehicle cab, the accelerator pedal and brake pedal are both controlled by the driver's right foot. They are very close to each other. In an emergency, it is easy to accidentally press the accelerator, causing an accident. Especially when encountering complex road conditions and requiring sudden braking and deceleration, the driver may panic and lose concentration due to limited driving skills. It is easy for the driver to mistake the accelerator pedal for the brake pedal and accidentally press the accelerator. The vehicle speed increases instantly, causing serious car accidents and causing loss of life and property.

At present, some accelerator pedals are designed to prevent accidental depression. However, existing accelerator pedals generally determine whether the driver has accidentally depressed the pedal. When it is determined that the driver has accidentally depressed the pedal, the accelerator pedal will be directly disabled, which makes it impossible for the driver to take the initiative to correct it. , leading to certain safety hazards when misjudgment occurs.

In view of this, this application proposes an accelerator pedal, which aims to solve the problem that the driver cannot actively correct the traditional accelerator pedal when a misjudgment occurs, thus causing certain safety hazards. Figures 1 to 3 show an embodiment of the accelerator pedal provided by the present application.

Please refer to Figures 1 to 3. The accelerator pedal 100 proposed in this application 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 mounted on the base 1 in a direction approaching and away from the base 1. The pedal 2 is used for stepping on and rotates toward the base 1 when stepped on; the electromagnetic limiter The positioning device 3 is disposed between the pedal 2 and the base 1. The electromagnetic limiting device 3 has a limiting state for hindering the movement of the pedal 2 when energized; the sensing device is disposed on the On the pedal 2, the sensing device is used to sense the pressure on the pedal 2, so as to send a limit signal when the pressure is greater than the preset pressure value; the control device, the sensing device and the The electromagnetic limiting devices 3 are electrically connected respectively, and the control device is used to control the operation of the electromagnetic limiting devices 3 when receiving the limiting signal.

In the technical solution of the present application, the pressure on the pedal 2 is sensed by the sensing device. When the pressure is greater than the preset pressure value, it means that the driver is more excited when stepping on the accelerator pedal 100 , which means that the pedal 2 At this time, there is a high probability of being stepped on by mistake, and the sensing device will send out the limit signal at this time. In this application, when receiving the limit signal, the control device will not directly disable the pedal 2, but will control the electromagnetic limit device 3 to energize, thereby hindering the movement of the pedal 2, thereby Feedback gives the driver a resistance, so that the driver can know in time that the current use of the pedal 2 is irregular and the pedaling force needs to be reduced or the brake pedal 2 needs to be used instead.

The electromagnetic limiting device 3 will prevent the driver from stepping on the pedal 2, thereby allowing the driver to quickly react to his or her operating errors and need to adjust. Moreover, when the driver intentionally reduces the stepping pressure on the pedal 2, the pressure sensed by the sensing device will also decrease accordingly. When the pressure is less than the preset pressure value, the The sensing device will no longer send the limit signal, and the control device will also control the electromagnetic limit device 3 to cancel the limit on the pedal 2, so that the accelerator pedal 100 can operate normally.

The sensing device includes a pressure sensor for sensing the pressure on the pedal 2, but is not limited to the pressure sensor. The sensing device may also include a vibration sensor. The vibration sensor can sense the vibration of the vehicle body and thereby send out vibration signals of different frequencies according to the vibration of the vehicle body. After receiving the vibration signal, the control device The electromagnetic limiting device 3 can be controlled to apply different amounts of resistance to the pedal 2 according to the frequency of the vibration signal. Different sizes of resistance can remind the driver to control the vehicle speed within a safe driving speed for the current road conditions. Of course, the sensing device can also include other sensors, which can be adjusted according to usage requirements.

In one embodiment, please refer to Figures 1 and 2. The electromagnetic limiting device 3 includes: a cylinder 31, a connecting rod 32, a working piston 33 and an electromagnetic limiting member. The cylinder 31 extends from the base 1 toward the pedal 2, and an installation cavity 311 is provided inside the cylinder 31; one end of the connecting rod 32 is installed on the pedal 2, and the other end extends into the pedal 2. In the installation cavity 311; the working piston 33 is installed on one 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 limiter is installed on the In the installation cavity 311, the electromagnetic limiting member is used to be electrically connected to the power source to hinder the movement of the working piston 33 when power is supplied.

In this embodiment, the electromagnetic limiting device 3 blocks the movement of the working piston 33 through the electromagnetic limiting piece, which makes the connecting rod 32 unable to move toward the base 1, thereby also limiting the movement of the working piston 33. The pedal 2 rotates towards the base 1 . It should be noted that the connecting rod 32 and the working piston 33 are installed in the installation cavity 311 in the cylinder 31, so that the working piston 33 is under pressure, and the electromagnetic limiter When power is supplied, the working piston 33 cannot continue to move around the electromagnetic limiting member.

Referring to Figure 2, the installation cavity 311 includes a main body chamber 3111 located on the other side of the working piston 33 relative to the connecting rod 32. The main body chamber 3111 is used to accommodate magnetorheological fluid; the working The piston 33 is made of magnetically conductive material, and an annular groove 331 is provided in the middle of the working piston 33; the electromagnetic limiter includes a coil 34 wound around the annular groove 331, and the coil 34 is used to When electricity is applied, the magnetorheological fluid is condensed and solidified.

In this embodiment, the working piston 33 actually separates the installation cavity 311, and the cavity located on the other side of the working piston 33 relative to the connecting rod 32 is the main body cavity 3111. When the electromagnetic limiting member is energized, the movement of the working piston 33 in the main body chamber 3111 can be restricted. The specific limiting method of the electromagnetic limiting member is to fill the magnetorheological fluid in the main body chamber 3111, and the electromagnetic limiting member also includes a coil 34 wound around the annular groove 331, This enables the coil 34 to obtain magnetic force through electromagnetic force after the coil 34 is energized, thereby generating a magnetic field. The magnetorheological fluid located in the magnetic field will change from liquid to solid, thereby hindering the movement of the working piston 33 in the main body chamber 3111.

The electromagnetic limiting member may also limit the working piston 33 in other ways. For example, the electromagnetic limiting member may be an electromagnet, and the electromagnet is provided on the working piston 33. When the electromagnet is energized, the working piston 33 will be attracted to the side of the cylinder 31. wall, thereby limiting the continued movement of the pedal 2. Therefore, there is not only one specific implementation mode of the electromagnetic limiting member, but certain adjustments can be made according to the specific use environment. It should be noted that the magnetorheological fluid has different viscosities according to the intensity of the magnetic field, which also allows the resistance of the magnetorheological fluid to the working piston 33 to be adjusted by changing the current intensity of the coil 34 , thereby meeting more diverse usage needs.

In addition, when the coil 34 is not energized, the magnetorheological fluid is in a liquid-like state. At this time, when the driver steps on the pedal 2, the pedal 2 can move normally, but the magnetorheological fluid still causes the movement of the pedal 2 to have small damping, that is, resident damping. When the vehicle is driving normally, the driver can feel the resident damping every time he steps on the pedal 2, which actually constantly reminds the driver that he is using the accelerator pedal 100. , to help the driver differentiate between the accelerator pedal 100 and the brake pedal, thereby reducing the occurrence of accidental depression.

In one embodiment, the electromagnetic limiting member further includes an annular yoke 35 disposed in the annular groove 331 , and the annular yoke 35 is disposed in the middle of the annular groove 331 to connect the The annular groove 331 is spaced by two mounting grooves 331a. There are two coils 34, and the two coils 34 are respectively disposed in the two mounting grooves 331a.

In this embodiment, the annular magnetic yoke 35 is disposed in the middle of the annular groove 331 , that is to say, the annular magnetic yoke 35 is located between the two coils 34 , thereby connecting the two coils 34 The generated electromagnetic field is separated, thus strengthening the magnetic field intensity in the installation cavity 311 . This allows the two coils 34 to increase the viscosity of the magnetorheological fluid without requiring too much voltage, that is, to provide greater resistance to the working piston 33 and reduce usage consumption.

In one embodiment, please refer to FIG. 2 . When the accelerator pedal 100 is used in a specific application, the pedal 2 needs to be repeatedly rotated in the direction of approaching and moving away from the base 1 , so that the car can move when the pedal 2 is close to the base 1 . The vehicle accelerates when the base 1 is located and cancels acceleration when the pedal 2 moves away from the base 1 . Therefore, the pedal 2 needs a reset member 36 to return the pedal 2 to its initial position, which facilitates subsequent use of the pedal 2 . Therefore, in an embodiment of the present application, the pedal 2 has an initial position away from the base 1 during rotation; the electromagnetic limiting device 3 also includes a reset member 36, and the reset member 36 is provided on the In the installation cavity 311, the reset member 36 is used to push the working piston 33 to reset the pedal 2 to the initial position when the pedal 2 is not stepped on.

In this embodiment, the pedal 2 will move from the initial position toward the base 1 under the action of pressure. At this time, the pedal 2 can push the reset member 36 to move together under the action of pressure. The reset member 36 will exert a certain force on the pedal 2 after being pushed, so that the pedal 2 moves in a direction away from the base 1 when no pressure is applied, thus completing the reset.

In one embodiment, the installation chamber 311 includes a body chamber 3111 located on the other side of the working piston 33 relative to the connecting rod 32; the reset member 36 includes a floating piston located in the body chamber 3111. 361. The floating piston 361 is used to divide the main body chamber 3111 into two parts, where the part close to the working piston 33 is the working chamber 3111a, and the part far away from the working piston 33 is the reset chamber 3111b. .

In this embodiment, the floating piston 361 is disposed between the working chamber 3111a and the reset chamber 3111b. When the pedal 2 rotates toward the base 1, the working piston 33 will push the The floating piston 361 moves, which causes the floating piston 361 to compress the gas in the reset chamber 3111b and increase the air pressure in the reset chamber 3111b. After the working piston 33 no longer pushes against the floating piston 361, the floating piston 361 will push back the floating piston 361 under the action of air pressure, thereby resetting the pedal 2.

Regarding the reset member 36 , it should be noted that the reset member 36 is not limited to the floating piston 361 . The reset member 36 may also be an elastic member, such as a spring. When the working piston 33 moves toward the reset chamber 3111b, the spring will be compressed. When the working piston 33 no longer pushes against the spring, The spring will push back the working piston 33 under the action of elastic force, thereby causing the pedal 2 to return to its original position.

In one embodiment, please refer to Figures 1 and 2. When the pedal 2 moves toward the base 1, the pedal 2 will drive the connecting rod 32 to move together, and the pedal 2 rotates, so When the pedal 2 and the connecting rod 32 are connected in a conventional manner, the connecting rod 32 will rotate along with the pedal 2 , which places great restrictions on the movement of the connecting rod 32 . Therefore, in an embodiment of the present application, a mounting rod 21 is provided on the side of the pedal 2 facing the base 1, and the mounting rod 21 is disposed in the same direction as the rotation axis of the pedal 2; the connecting rod 32 A collar 321 is provided near one end of the pedal 2 . The collar 321 is sleeved on the mounting rod 21 so that when the pedal 2 rotates, the mounting rod 21 slides within the collar 321 .

In this embodiment, when the pedal 2 rotates, the mounting rod 21 rotates in the collar 321 , so that the pedal 2 can rotate relative to the connecting rod 32 . However, when the pedal 2 rotates toward the base 1 , the pedal 2 will push against the connecting rod 32 , so that the connecting rod 32 pushes the working piston 33 to move. In the technical solution of this embodiment, the collar 321 and the mounting rod 21 allow the pedal 2 and the connecting rod 32 to move relative to each other, so that the connecting rod 32 can move more freely.

In this application, the accelerator pedal 100 includes a control device. The control device is shown in Figure 4. The control device is electrically connected to the sensing device and the electromagnetic limiting device 3, respectively, for controlling The pedal 2.

The control device may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize connection communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). The optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

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

In the control device shown in Figure 4, the processor 1001 calls the control program of the accelerator pedal 100 stored in the memory 1005, and performs the following operations:

Get the pressure value of pedal 2.

According to the pressure value, the electromagnetic limiting device 3 is controlled to operate.

In one embodiment, the processor 1001 calls the control program of the accelerator pedal 100 stored in the memory 1005, and also performs the following operations:

When the pressure value is greater than the preset pressure value, the electromagnetic limiting device 3 is controlled to enter a limiting state to hinder the movement of the pedal 2 .

In one embodiment, the processor 1001 calls the control program of the accelerator pedal 100 stored in the memory 1005, and also performs the following operations:

When the pressure value is greater than the preset pressure value, the control coil 34 is connected to current, so that the magnetorheological fluid condenses and solidifies.

Based on the above hardware structure, this application proposes a control method of the accelerator pedal 100 . The control method of the accelerator pedal 100 senses the pressure value of the pedal 2 through the sensing device, and determines based on the pressure value. Whether the pedal 2 is currently pressed by mistake.

Please refer to FIG. 5 , which is a schematic flowchart of an embodiment of the control method of the accelerator pedal 100 provided by the present application.

S10: Get the pressure value of pedal 2.

S20: Control the operation of the electromagnetic limiting device 3 according to the pressure value.

In this embodiment, the control device obtains the pressure value of the pedal 2 through the sensing device, and determines whether the pedal 2 is currently stepped on by mistake based on the pressure value. When it is determined that it has been 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 determined that it is in normal use, the control device does not The electromagnetic limiting device 3 is controlled to limit the pedal 2 so that the accelerator pedal 100 can be used normally.

The step S20 includes:

S21: When the pressure value is greater than the preset pressure value, control the electromagnetic limiting device 3 to enter the limiting state to hinder the movement of the pedal 2.

In this embodiment, a preset pressure value is preset in the database of the control device. When the sensing device senses a real-time pressure value, the pressure value is compared with the preset pressure value. When the pressure value is greater than the preset pressure value, the sensing device sends a limit signal, and the control device controls the electromagnetic limit device 3 to limit the pedal 2 , thereby limiting 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 limit signal, and the control device will not control the electromagnetic limit device 3 to move the pedal 2 The position is limited so that the accelerator pedal 100 can be used normally.

The preset pressure value can be adjusted accordingly according to the driver's physical fitness and usage needs, and is not specifically limited here.

The electromagnetic limiting device 3 includes a cylinder 31, a working piston 33 located in the cylinder 31, a coil 34, and a connecting rod 32 with both ends connected to the piston and the base 1 respectively. The cylinder 31 Used to contain magnetorheological fluid. The step S21 includes:

S211: When the pressure value is greater than the preset pressure value, the control coil 34 connects to the current, so that the magnetorheological fluid condenses and solidifies.

In this embodiment, the electromagnetic coil 34 generates an electromagnetic field when energized, and the electromagnetic field can increase the viscosity of the magnetorheological fluid, thereby transforming the magnetorheological fluid from a liquid into a solid. When the magnetorheological fluid turns into a solid, it will block the cylinder 31 , so that the working piston 33 in the cylinder 31 cannot continue to move. Therefore, when the pressure value is greater than the preset pressure value, the sensing device will send out a limit signal, and the control device only needs to control the coil 34 to connect the current to generate an electromagnetic field in the cylinder 31 That's it.

The above are only optional embodiments of the present application, and are not intended to limit the patent scope of the present application. Under the concept of the present application, any equivalent structural transformation made by using the contents of the description and drawings of the present application, or direct/indirect Application in other related technical fields is included in the scope of patent protection of this application.

Claims (10)

1. An accelerator pedal, including:

   base;

   A pedal, one end of which is rotatably mounted on the base in a direction close to and away from the base. The pedal is used for stepping on and rotates toward the base when stepped on;

   An electromagnetic limiting device is provided between the pedal and the base. The electromagnetic limiting device has a limiting state for hindering the movement of the pedal when energized;

   A sensing device is provided on the pedal, and the sensing device is used to sense the pressure on the pedal to send a limit signal when the pressure is greater than a preset pressure value; and,

   A control device is electrically connected to the sensing device and the electromagnetic limiting device respectively. The control device is used to control the operation of the electromagnetic limiting device when receiving the limiting signal.
2. The accelerator pedal of claim 1, wherein the electromagnetic limiting device includes:

   A cylinder extends from the base toward the pedal, and an installation cavity is provided inside the cylinder;

   A connecting rod with one end installed on the pedal and the other end extending into the installation cavity;

   A working piston is installed at one end of the connecting rod extending into the installation cavity, and the working piston is slidably installed in the installation cavity; and,

   An electromagnetic limiter is installed in the installation cavity. The electromagnetic limiter is used to be electrically connected to the power source to hinder the movement of the working piston when power is supplied.
3. The accelerator pedal of claim 2, wherein the installation cavity includes a main body cavity located on the other side of the working piston relative to the connecting rod, and the main body cavity is used to accommodate magnetorheological fluid;

   The working piston is made of magnetically conductive material, and an annular groove is provided in the middle of the working piston;

   The electromagnetic limiting component includes a coil wound around the annular groove, and the coil is used to condense and solidify the magnetorheological fluid when energized.
4. The accelerator pedal of claim 3, wherein the electromagnetic limiting member further includes an annular yoke disposed in the annular groove, and the annular yoke is disposed in the middle of the annular groove to hold the The annular groove is spaced apart by two installation grooves, and there are two coils. The two coils are respectively provided in the two installation grooves.
5. The accelerator pedal according to any one of claims 2 to 4, wherein the pedal has an initial position away from the base during rotation;

   The electromagnetic limiting device also includes a reset piece, which is provided in the installation cavity. The reset piece is used to push the working piston to reset the pedal to the position when the pedal is not stepped on. the initial position.
6. The accelerator pedal of claim 5, wherein the installation cavity includes a body cavity located on the other side of the working piston relative to the connecting rod;

   The reset member includes a floating piston located in the main body chamber. The floating piston is used to divide the main body chamber into two parts. The part close to the working piston is the working chamber, and the part far away from the working piston is the working chamber. The part of the working piston is the reset chamber.
7. The accelerator pedal of claim 2, wherein a mounting rod is provided on one side of the pedal toward the base, and the mounting rod is disposed in the same direction as the rotation axis of the pedal;

   A collar is provided at one end of the connecting rod close to the pedal, and the collar is sleeved on the mounting rod, so that when the pedal rotates, the mounting rod slides in the collar.
8. A method of controlling an accelerator pedal, used to control the accelerator pedal according to any one of claims 1 to 7, the method of controlling the accelerator pedal comprising the following steps:

   Get the pressure value of the pedal;

   According to the pressure value, the electromagnetic limiting device is controlled to work.
9. The accelerator pedal control method according to claim 8, wherein the step of controlling the operation of the electromagnetic limit device according to the pressure value includes:

   When the pressure value is greater than the preset pressure value, the electromagnetic limiting device is controlled to enter a limiting state to hinder the movement of the pedal.
10. The accelerator pedal control method according to claim 9, wherein the electromagnetic limiting device includes a cylinder, a working piston provided in the cylinder, a coil, and two ends connected to the piston and the base respectively. Connecting rod, the cylinder is used to accommodate magnetorheological fluid;

    When the pressure value is greater than the preset pressure value, the step of controlling the electromagnetic limiting device to enter a limiting state to hinder the movement of the pedal includes:

    When the pressure value is greater than the preset pressure value, the control coil is connected to current, so that the magnetorheological fluid condenses and solidifies.