CN111267800A

CN111267800A - Auxiliary brake device, system and method, steering wheel assembly and motor vehicle

Info

Publication number: CN111267800A
Application number: CN202010233213.4A
Authority: CN
Inventors: 龚赛军
Original assignee: Shengzhou Deda Technology Co Ltd
Current assignee: Shengzhou Deda Technology Co Ltd
Priority date: 2020-03-29
Filing date: 2020-03-29
Publication date: 2020-06-12

Abstract

The invention discloses an auxiliary brake device, a system and a method, a steering wheel assembly and a motor vehicle, wherein the auxiliary brake device comprises: the operating piece is arranged in a circle of groove of the steering wheel along the circumferential direction, and each part of the operating piece can move under the action of pressure; the detector is arranged on one side of the operating piece along the circumferential direction, and the detection part of the detector can generate a first signal in the process of moving the corresponding part on the operating piece. The auxiliary braking method comprises the following steps: acquiring a first signal under the condition that a first preset condition is met; and judging whether the first signal exceeds a first preset value or not, and if so, generating a first signal response signal. The invention can control the braking without changing the position and the posture of the two hands on the steering wheel, thereby improving the braking efficiency and the operation convenience degree, and being beneficial to improving the driving safety.

Description

Auxiliary brake device, system and method, steering wheel assembly and motor vehicle

Technical Field

The invention belongs to the technical field of wheel driving control, and particularly relates to an auxiliary brake device, an auxiliary brake system, an auxiliary brake method, a steering wheel assembly and a motor vehicle.

Background

The automobile is a very important vehicle, but the traffic accidents frequently happen, wherein the fact that the brake is not stepped on in time is a significant factor which is not negligible.

The patent document "201610316297.1" discloses the following: the outer layer of the steering wheel is covered with a layer of pressure sensing device, whether braking is executed or not and the braking action degree are judged by detecting the gripping pressure, because the force for gripping the steering wheel by the same driver in different stages and different states under different road conditions is greatly different, and in addition, the driver needs to accelerate as soon as possible under certain emergency conditions so as to quickly leave a dangerous area, which is ten thousand of times and can not brake.

The technical solution disclosed in patent document "201420579298.1" has a trigger with only two positions, which makes it difficult to quickly find the braking device when turning, thus affecting the efficiency and safety of braking.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the auxiliary brake device, the auxiliary brake system, the auxiliary brake method, the steering wheel assembly and the motor vehicle can perform brake control without changing the position and the posture of two hands on the steering wheel, and improve brake efficiency and operation convenience degree, so that driving safety is improved.

The invention is realized by the following steps: an auxiliary brake apparatus, comprising:

the operating piece is arranged in a circle of groove of the steering wheel along the circumferential direction, and each part of the operating piece can move under the action of pressure;

the detector is arranged on one side of the operating piece along the circumferential direction, and the detection part of the detector can generate a first signal in the process of moving the corresponding part on the operating piece.

Furthermore, the operating part is a complete ring or a plurality of strips which are arranged in sections,

when the operating part is a ring-shaped object, the part of the ring-shaped object can deform under the action of pressure;

when the operating part is a strip-shaped object, the part of the strip-shaped object can move under the action of pressure.

Further, the operating member is disposed in two layers in the direction of the rotational axis of the steering wheel.

Further, the groove on the steering wheel is opened on the surface inner side or the surface upper side of the steering wheel.

Further, still include:

the switch is arranged on one side of the operating part, and a contact of the switch can open/close a working circuit of the detector;

the vibrator is arranged on one side of the operating piece, and a vibration end of the vibrator can generate a first vibration force and a second vibration force;

the first vibration force and the second vibration force respectively drive corresponding parts of the operating piece to move in opposite directions.

Further, the air conditioner is provided with a fan,

further comprising:

the limiting part is arranged on the groove wall close to the notch in the groove, and the part of the limiting part can move to a corresponding position under the action of pressure so as to adjust the extending width of the groove.

Further, the air conditioner is provided with a fan,

further comprising:

the baffle is movably arranged on the steering wheel and can seal or expose the groove on the steering wheel.

The present invention also provides a steering wheel assembly comprising:

the surface of the steering wheel is provided with a circle of grooves for fingers to extend into;

an auxiliary brake device as above.

The invention also provides an auxiliary braking method, which comprises the following steps:

acquiring a first signal under the condition that a first preset condition is met;

judging whether the first signal exceeds a first preset value or not, and if so, generating a first signal response signal; the first preset condition and the first preset value are preconfigured.

Further, the first preset condition includes:

judging whether an initial signal is acquired, wherein the initial signal is a pressure signal or a displacement signal;

judging whether the initial signal exceeds a second preset value or not, and if so, meeting the first preset condition; the second preset value is greater than the first preset value and is preconfigured.

Further, still include:

acquiring a second signal under the condition that a second preset condition is met;

judging whether the first signal exceeds a third preset value or not, and if so, generating a first signal response signal; the third preset value is greater than the first preset value, and the second preset condition and the third preset value are preconfigured.

Further, the second preset condition includes:

if so, executing a judging step of a first preset condition or a third preset condition, otherwise, meeting the second preset condition, wherein the third preset condition is configured in advance.

Further, acquiring a third signal under the condition that the second signal exceeds a third preset value;

generating a third signal response signal, wherein the third signal response signal comprises a throttle cut signal and a brake force signal matched with the third signal.

Further, still include:

and judging whether a first signal for generating the braking force signal is reduced to zero within a first preset time and detecting a steering wheel angle signal, if so, continuing to execute a braking action and gradually reducing the braking force to zero within a second preset time, wherein the second preset time is configured in advance.

Further, still include:

acquiring a current vehicle speed and an accelerator signal;

and under the condition that the current vehicle speed is lower than the preset vehicle speed, if the throttle signal is lower than a first preset throttle value, executing according to the throttle signal, and if the throttle signal is higher than a second preset throttle value, executing according to the second preset throttle value.

Further, still include:

the method for generating the brake force signal comprises the following steps:

and judging whether the number of the first signals or the second signals is one, if so, directly converting the signals into corresponding braking force signals according to a preset coefficient, otherwise, distributing the braking force signals according to a preset weight, wherein the preset coefficient and the preset weight are configured in advance.

Further, still include:

under the condition of meeting a third preset condition, stopping or switching the system into other modes, wherein the other modes are working modes meeting the first preset condition or the second preset condition; the third preset condition is preconfigured.

Further, the third preset condition includes:

acquiring the occurrence frequency and the occurrence time of an initial signal;

and judging whether the occurrence frequency of the initial signal is multiple times and whether the interval of the initial signals of the first time and the last time exceeds a fourth preset value, if so, meeting the third preset condition, wherein the fourth preset value is configured in advance.

The invention also provides an auxiliary braking system, comprising:

the device comprises an acquisition module, a processing module and a control module, wherein the acquisition module is used for acquiring a first signal under the condition that a first preset condition is met, and the first signal is a pressure signal or a displacement signal;

the control module is used for judging whether the first signal exceeds a first preset value or not, and if so, generating a first signal response signal; the first preset condition and the first preset value are preconfigured.

Further, the obtaining module is further configured to obtain a second signal when a second preset condition is met;

the control module is further used for judging whether the first signal exceeds a third preset value or not, and if so, generating a first signal response signal; the third preset value is greater than the first preset value, and the second preset condition and the third preset value are preconfigured.

The present invention also provides a motor vehicle comprising:

such as a steering wheel assembly or an auxiliary braking system as described above.

The invention has the following beneficial effects:

1. the auxiliary brake device provided by the invention is provided with a plurality of pressable parts arranged along the circumferential direction, so that corresponding brake actions can be executed by pressing down an operating part on the steering wheel with fingers without a driver visually observing the steering wheel and changing the current hand-holding position and posture during braking, the operation is flexible and reliable, the braking efficiency and the convenience degree are improved, and the driving safety is improved.

2. The auxiliary brake device provided by the invention is provided with the two layers of operating pieces arranged in the axial direction of the steering wheel, so that the detection precision is improved, and the influence on normal braking caused by the damage of one layer of operating pieces or a corresponding detector in the use process is prevented.

3. The auxiliary brake device is provided with the limiting piece arranged at the position, close to the notch, of the groove, so that misoperation can be reduced as much as possible, and normal driving safety is prevented from being influenced.

4. The auxiliary braking method can adjust the braking force according to the finger pressure of a driver, is accurate to control and avoids misoperation.

5. The auxiliary braking method has multiple braking modes to cope with different working conditions in driving, has higher control flexibility, and improves the driving experience.

Drawings

FIG. 1 is a perspective view of a steering wheel assembly of the present invention from a top perspective;

FIG. 2 is a perspective view of the steering wheel assembly of FIG. 1 from a bottom perspective;

FIG. 3 is a cross-sectional view of the steering wheel assembly of FIG. 1 as pressed by a finger;

FIG. 4 is a cross-sectional view of the steering wheel assembly of FIG. 1 with the limiting member at a minimum opening;

FIG. 5 is a cross-sectional view of the steering wheel assembly of FIG. 1 with the limiting member at a maximum opening;

FIG. 6 is a partial schematic view of the steering wheel assembly of FIG. 1 in an unpressed state;

FIG. 7 is a partial schematic view of the steering wheel assembly of FIG. 1 in a finger depressed state;

FIG. 8 is a perspective view of the auxiliary brake apparatus according to the present invention;

FIG. 9 is a schematic view of a detector coupled to an operating member of the auxiliary brake apparatus of FIG. 8;

FIG. 10 is a schematic view of an adjustment mechanism for a limiting member of the steering wheel assembly;

FIG. 11 is a schematic view of another adjustment structure of a limiting member in the steering wheel assembly;

FIG. 12 is a flow chart of an auxiliary braking method of the present invention;

FIG. 13 is a system diagram of an auxiliary braking system according to the present invention.

Detailed Description

The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.

As shown in fig. 1 to 7, a steering wheel assembly includes a steering wheel 10 and an auxiliary brake device 20, a steering wheel frame 11 is disposed at the center of the steering wheel 10, a circle of grooves 22 for fingers 31 to extend into are disposed on the surface of the steering wheel 10, and the groove opening is chamfered. Preferably, the recess 22 is formed on the inner side of the surface of the steering wheel 10, such that the index, middle, ring and small fingers can be conveniently inserted into the recess 22 to operate the auxiliary brake device 20. In addition, the recess 22 may be formed on the upper surface of the outer wall of the steering wheel 10, such that it is convenient for a thumb to be inserted into the recess 22 to operate the auxiliary brake device 20. When the groove 22 is arranged on the inner side of the surface of the steering wheel 10, the bottom surface of the joint of the steering wheel frame 11 and the steering wheel 10 is provided with a through groove 29, so that fingers can extend into the through groove 29 when being placed at the end part of the steering wheel frame 11, and further extend into the groove 22 on one side of the through groove 29.

Preferably, the steering wheel assembly further includes a baffle movably disposed on the steering wheel 10 and capable of closing or exposing the groove 22 on the steering wheel 10. When the baffle is put down to cover the groove 22, the fingers 31 cannot extend into the groove 22, and external sundries cannot enter the groove 22, so that the components in the groove 22 can be protected from being damaged.

As shown in fig. 8, the auxiliary brake device 20 includes an operating member 21 and a detector 25. The operating member 21 is circumferentially disposed in a ring of grooves 22 of the steering wheel 10, and each portion thereof is movable under pressure. The detector 25 is disposed on one side of the operating element 21 in the circumferential direction, and a detection portion thereof can generate a first signal in the process of moving a corresponding portion on the operating element 21, wherein the first signal is a pressure signal or a displacement signal. The operating member 21 is located entirely within the recess 22 in either the operating or non-operating state, thereby avoiding inadvertent contact by the finger 31. Preferably, the operation member 21 is configured to move along the radial direction of the steering wheel 10, so that the position of the detector 25 and the operation member 21 on the circumference is kept unchanged, and the finger touch is facilitated. This way of circumferentially distributing the operating elements 21 and the detectors 25 has the following advantages:

the braking purpose can meet the following conditions during steering: 1. the hand and the steering wheel are relatively static, so that the brake can be controlled at any time. 2. The hand can be controlled to brake when the posture of the hand relative to the body is unchanged (for example, the hand slides and the steering wheel rotates). 3. The hand is separated from the steering wheel and then grasps the steering wheel, and the operation can be carried out as long as the postures of the fingers are the same.

Secondly, the user can directly perform the braking operation without depending on the vision, and meanwhile, the current braking force is known through the tactile feedback.

And thirdly, the guiding operation by using the residual light in non-emergency situations is very convenient (for example, the instrument panel and the steering wheel are observed by using the residual light under normal conditions), and the device is also suitable for the leg disabled.

Preferably, the detector 25 in this embodiment is a pressure sensor with a large stroke, which can make the operating member 21 generate a large stroke displacement, so that the finger 31 can sense the movement of the operating member 21 and the magnitude of the applied force during pressing, thereby facilitating more accurate pressure adjustment. As an alternative, as shown in fig. 9, the detector 25 may also be a pressure sensor 251 provided with a spring 252. The spring 252 provides a travel stroke when the operating member 21 is pressed and transmits a force to the pressure sensor 251. In addition, the spring 252 may be replaced by other elastic components, such as a flexible closed cavity such as an air bag or a liquid bag, and the moving stroke of the operation element 21 and the transmission of the acting force are provided by the deformation of the cavity.

As a preferable example, the detector 25 may be a displacement sensor having a large stroke, and the displacement sensor may detect the displacement amount or deformation amount of the operating element 21.

Specifically, the operating member 21 includes a plurality of bars arranged in segments along the circumferential direction of the steering wheel 10, each bar is provided with at least one detector 25, the position of the bar can move under the action of pressure, and the corresponding detector 25 can detect the pressure value when the bar moves under pressure. This enables the user's finger 31 to be turned inwards to extend into the recess 22 and press any one of the bars, regardless of the position on the steering wheel 10, so that the corresponding detector 25 generates a pressure signal, and finally, the braking control is performed according to the pressure signal. As shown in fig. 4 and 5, as a preferable example, the operating member 21 is provided in two layers in the direction of the rotation axis of the steering wheel 10, one layer being the upper operating member 21b and the other layer being the lower operating member 21 a. Correspondingly, the detector 25 is also divided into two layers, one being the upper detector 25b and the other being the detector 25 a. This arrangement improves the accuracy of detection and prevents damage to one of the layers of operating members 21 or corresponding detectors 25 during use, which could affect normal braking.

As another preferred example, the operating member 21 is a complete ring. Any one position on the ring can be used as a position and can deform under the action of pressure. In this configuration, the detectors 25 are arranged uniformly in the circumferential direction, and when any one portion of the operation element 21 is deformed by pressure, the detector 25 closest to the portion can detect a pressure value to perform braking control.

As a preferred example, the steering wheel assembly further includes a switch provided on one side of the illustrated operating member 21 and having a contact capable of opening/closing an operating circuit of the detector 25, and a vibrator 28. The vibrator 28 is disposed on one side of the operating member 21, and a vibration end thereof is connected to the operating member.

If the operating member 21 is subjected to a pressure exceeding the operating pressure of the switch, the contacts of the switch are closed and the operating circuit of the detector 25 is energized to be in an operating state. At this time, as a feedback, the vibrator 28 generates a first vibration force to drive the operating member 21 to move slightly inward, indicating that the auxiliary braking function of the steering wheel 10 is activated. If the operating member 21 is not subjected to a pressure exceeding the operating pressure of the switch, the switch contacts are opened and the operating circuit of the detector 25 is de-energized, and as a feedback, the vibrator 28 generates a second vibratory force to drive the operating member 21 to move slightly outwards, indicating that the finger 31 is no longer triggering the operating member 21. As a preferred example, the vibrator 28 may be selected from a linear vibration motor commonly used in mobile devices.

As shown in fig. 3 to 5, as a preferred example, the steering wheel assembly further includes a stopper 27, and the stopper 27 is disposed on a wall of the groove 22 near the notch, and a portion of the stopper 27 can move to a corresponding position under the action of pressure to adjust the extendable width of the groove 22. As shown in fig. 4 and 5, as a preferred example, the number of the position-limiting members 27 is two, one is an upper position-limiting member 27a, and the other is a lower position-limiting member 27b, the upper and lower position-limiting

members

27a, 27b are respectively disposed on the upper and lower groove walls of the groove 22, and the position-limiting members 27 can be driven to contract toward the inside of the steering wheel 10 when the finger 31 extends into the groove 22. It should be noted that, in order to avoid the finger 31 from inadvertently extending into the recess 22, the stop member 27 is configured to normally require a large force to retract inwardly, thereby allowing the finger 31 to enter the recess 22. Preferably, the stopper 27 is in the shape of a circular ring or a segmented structure similar to the operation element 21.

As shown in fig. 10, as a preferred example, the adjustment of the limiting member 27 is realized by a bolt 23 and a micro motor, a threaded hole 24 parallel to the axial direction of the steering wheel is provided on the limiting member 27, the bolt 23 is in threaded fit with the threaded hole 24, the micro motor is installed on the steering wheel 10, and the rotating shaft of the micro motor is connected with the bolt 23. When the rotating shaft of the micro motor rotates, the bolt 23 can be driven to move in the threaded hole 24, so that the movement of the limiting piece 27 is realized.

As shown in fig. 11, as a preferred example, the adjustment of the limiting member 27 is realized by a linear motor and a slider set, the slider set includes a first slider 28 and a second slider 29, the first slider 28 is disposed on the limiting member 27 parallel to the axial direction of the steering wheel, the second slider 29 is disposed in the sliding slot inside the steering wheel 10 parallel to the radial direction of the steering wheel, the linear motor is fixedly disposed in the steering wheel, and the movable end thereof is connected to the second slider 29. The surfaces of the first slider 28 and the second slider 29 that contact each other are inclined surfaces, and when the movable end of the linear motor moves, the second slider 29 moves the first slider 28 in the axial direction of the steering wheel 10 by the inclined surface cooperation, so that the movement of the limiting member 27 is realized.

Adjustment of the stop 27 is a prior art threaded fit that translates rotational motion into up and down movement.

As shown in fig. 12, based on the same inventive concept, the present invention also provides an auxiliary braking method, including:

and S1, starting the system, wherein the system can be started simultaneously with the start of the vehicle by one key, and the step belongs to the conventional means and is not described in detail.

And S2, after the system is started, the vehicle sends out a signal to remind a user to execute an initialization operation after detecting that the driver is seated, and the process is used for activating the corresponding working mode. It should be noted that the method for detecting whether the driver sits is implemented by using a sensor under the seat, which is the prior art, and the subsequent steps are triggered only by using a signal in this step, so the details are not repeated. The invention discloses the following three working modes:

and S21, when the first preset condition is met, the system enters a first working mode.

In this mode, a first signal generated by the user' S finger touching the operating element 21 is acquired, and the first signal is a pressure signal or a displacement signal.

S212, judging whether the first signal exceeds a first preset value or not, and if so, generating a first signal response signal; the first signal response signal comprises a throttle open circuit signal and a brake force signal matched with the first signal; the first preset condition and the first preset value are preconfigured.

As a preferred example, the first preset condition includes: judging whether an initial signal is acquired, wherein the initial signal is a pressure signal or a displacement signal; and judging whether the initial signal exceeds a second preset value or not, and if so, meeting a first preset condition. The second preset value is greater than the first preset value and is preconfigured.

As a preferred example, the first preset value is 10N, and the second preset value is 120N. It should be noted that the second preset value is used to set relevant parameters, such as assigning weights to each hand during two-hand control. In the first mode, the service brake provides the primary braking force if there is also a service brake signal output during the auxiliary braking.

And S22, under the condition that a second preset condition is met, the system enters a second working mode.

In this mode, a second signal generated by the user' S finger touching the operating element 21 is acquired, and the second signal is a pressure signal or a displacement signal.

S222, judging whether the second signal exceeds a third preset value or not, and if so, generating a second signal response signal, wherein the second signal response signal comprises an accelerator open-circuit signal and a brake force signal matched with the second signal.

As a preferred example, the second preset condition includes: judging whether an initial signal is acquired, wherein the initial signal is a pressure signal or a displacement signal; if not, the second preset condition is met, and the third preset condition is configured in advance.

The content of step S22 means that the second operation mode is directly selected if the user has not performed any operation. The third preset value is greater than the first preset value, and the second preset condition and the third preset value are preconfigured. As a preferable example, the third preset value is 60N.

As a preferred example, in the second operation mode, the method further includes:

and S223, acquiring a third signal under the condition that the second signal exceeds a third preset value, wherein the third signal is a pressure signal or a displacement signal.

And S224, generating a third signal response signal, wherein the third signal response signal comprises an accelerator open circuit signal and a brake force signal matched with the third signal. In this example, when the acting force applied by the user exceeds the third preset value, the system performs the braking action, and then the user does not judge the magnitude of the acting force again after applying the acting force again and directly performs the braking force corresponding to the acting force.

In the present invention, the purpose of setting the second operation mode is to further ensure the driving safety, that is, the user may mistakenly touch the operation member 21 to cause the system response when knowing the auxiliary braking function. It is therefore necessary to manually set the condition for triggering the response to a higher level, i.e. a higher force, in order to initiate the second mode of operation. When the user who knows the system function just starts the system to initialize, if the first working mode is not selected and then wants to use the system to perform auxiliary braking, the user can perform braking control through the second working mode. At the time of initialization, the operator presses the operating element 21 with maximum pressure by the operator's finger 31 at a specific position, the limiting member 27 of the notch gradually extends, the position of the limiting member 27 is determined according to the thickness of the finger 31 in the slot to determine the width of the notch, and meanwhile, the maximum parameter of the degree of pressure deformation is recorded.

And S23, if a third preset condition is met, the system enters a third working mode.

S231, in the mode, the system is suspended, closed or carries out the step of judging whether the first preset condition or the second preset condition is met or not so as to switch to the first working mode or the second working mode. The third preset condition is preconfigured.

As a preferred example, the third preset condition includes: acquiring the occurrence frequency and the occurrence time of an initial signal; and judging whether the initial pressure times are multiple times and whether the interval between the first time and the last time exceeds a fourth preset value, if so, meeting a third preset condition, and the fourth preset value is configured in advance.

As a preferred example, the number of times the initial pressure meets the third preset condition is three times, and the fourth preset value is 1.5s, which also means that the third operating mode is entered if the user clicks the operating member 21 three times in a row within 1.5 s.

It should be noted that, in the present invention, in the system initialization stage, if the third preset condition is met, the system is directly turned off. If the system is set to the first working mode or the second working mode and the third preset condition is met, the system enters the initialization stage again, and the user can select the corresponding working mode again as required. Preferably, since the third operating mode is independent of braking, regardless of user convenience, a pair of operating members 21 on the steering wheel 10 at 3 o 'clock and 9 o' clock may be selected for activating the third operating mode.

As a preferred example, in the first operating mode and the second operating mode, the method for generating the brake force signal includes: and judging whether the number of the first signals or the second signals is one, if so, directly converting the first signals or the second signals into corresponding braking force signals according to a preset coefficient, otherwise, distributing the braking force signals according to a preset weight, wherein the preset coefficient and the preset weight are configured in advance. This means that if the user presses the operating member 21 with one hand, the system generates the corresponding braking force directly from this pressure value, and if the user presses the operating member 21 with both hands, the system distributes the braking force according to the weight of each hand. For example, the left hand force 150N and the right hand force 250N, the left hand pressing force 30N is equivalent to the right hand pressing force 50N, i.e., the right hand weight is 0.6 times that of the left hand. Furthermore, the left hand 120N or right hand 200N presses the maximum amount of the pressing action, and the maximum braking force is performed when the pressing force is equal to or exceeded.

The auxiliary braking method further comprises the following steps:

and S24, under the condition that the first signal is reduced to zero within the first preset time and the angle signal of the steering wheel (10) is detected, continuing to output the braking force signal and gradually reducing the braking force to zero within the second preset time.

Or, under the condition that the second signal is reduced to zero within the first preset time and the angle signal of the steering wheel (10) is detected, the braking force signal is continuously output and the braking force is gradually reduced to zero within the second preset time, wherein the second preset time is preset. This means that if it is detected that the vehicle is turning and the finger 31 is quickly moved away from the operating member 21, the system still performs the braking force before the movement, but the braking force gradually decreases with time, so that the safety in turning can be ensured. And if the steering wheel 10 returns to the regular second working mode, the normal response is recovered. As a preferred example, the first preset time is 0.3s, and the second preset time is 2 s.

S25, acquiring a current vehicle speed and an accelerator signal; and under the condition that the current vehicle speed is lower than the preset vehicle speed, if the throttle signal is lower than a first preset throttle value, executing according to the throttle signal, and if the throttle signal is higher than a second preset throttle value, executing according to a second preset throttle value. As a preferable example, the preset vehicle speed is 50km/h or 20km/h, the first preset throttle value is 20% of the maximum throttle, and the second preset throttle value is 50% of the maximum throttle.

It should be noted that the angle signal of the steering wheel 10, the throttle signal and the vehicle speed signal in this example are all derived from the running data of the vehicle itself, which are obtained by corresponding sensors, these data are only used in the specific processing procedure in the relevant steps of the present invention, and the obtaining manner of the data itself is not the improvement point of the present invention, and therefore, the details are not repeated. In the auxiliary braking method in this embodiment, the sequence numbers of the steps do not necessarily indicate the sequence of the steps except for specific descriptions.

As shown in fig. 13, the present invention also provides an auxiliary braking system 100 including an obtaining module 200 and a control module 300, based on the same inventive concept.

The obtaining module 200 is configured to obtain a first signal under the condition that a first preset condition is met, where the first signal is a pressure signal or a displacement signal; the control module 300 is configured to determine whether the first signal exceeds a first preset value, and if so, generate a braking signal and a braking force signal matched with the first signal applied by a user; the first preset condition and the first preset value are preconfigured. Preferably, the acquisition module 200 is the detector 25, and the control module 300 may be a controller separately provided or may be a vehicle computer of the vehicle itself.

As a preferred example, the obtaining module 200 is further configured to obtain a second signal when a second preset condition is met; the control module 300 is further configured to determine whether the second signal exceeds a third preset value, and if so, generate a second signal response signal, where the second signal response signal includes an accelerator open-circuit signal and a brake force signal matched with the second signal; the third preset value is greater than the first preset value, and the second preset condition and the third preset value are preconfigured.

As a preferred example, the obtaining module 200 is further configured to, when the third preset condition is met, stop, close, or judge whether the first preset condition or the second preset condition is met again; the third preset condition is preconfigured.

As a preferred example, the obtaining module 200 is further configured to continue outputting the braking force signal and gradually reducing the braking force to zero within a second preset time under the condition that the first signal is reduced to zero within a first preset time and the angle signal of the steering wheel 10 is detected;

and under the condition that the second signal is reduced to zero within the first preset time and the angle signal of the steering wheel 10 is detected, continuously outputting the braking force signal and gradually reducing the braking force to zero within the second preset time, wherein the second preset time is preset.

As a preferred example, the obtaining module 200 is further configured to obtain a current vehicle speed and an accelerator signal; and under the condition that the current vehicle speed is lower than the preset vehicle speed, if the throttle signal is lower than a first preset throttle value, executing according to the throttle signal, and if the throttle signal is higher than a second preset throttle value, executing according to a second preset throttle value.

Preferably, the auxiliary braking system 100 further includes a feedback module 400, the feedback module 400 is used for providing a vibration feedback force during a system start-up phase and a mode confirmation phase, and the feedback module 400 may be a linear vibration motor.

Based on the same inventive concept, the present invention also provides a motor vehicle, as a specific hardware structure, comprising the steering wheel assembly disclosed above, as a specific system frame, and the motor vehicle comprising the auxiliary brake system 100 disclosed above.

It should be noted that the braking operation is performed by a braking device, i.e., a specific executing component, which is a conventional device, and the braking signal generated by the auxiliary braking system 100 is used in the present invention to finally perform braking.

The weight of the main brake (foot brake) and the auxiliary brake (steering wheel brake) is automatically changed by the control module 300 in the process of intervention and quitting, and the weight of the two hands is also automatically controlled by the control module 300 in the process of intervention and quitting by both hands with one hand, so that the braking is stable finally. For example, the auxiliary braking system 100 provides 50% of the maximum braking force, and the service brake starts to intervene 30% of the maximum braking force, and at this time, the weight of the auxiliary braking system 100 is decreased, if the coefficient is 0.2, and the weight of the service brake is increased to a coefficient of 1.3, then the total braking force is basically unchanged, and as the service brake is getting normal, the coefficient is continuously adjusted, which indicates that the service brake is normally controlled, and the purpose is that the brake is mainly controlled by the service brake.

The auxiliary brake device 20, the system and the method can be used as emergency brake, which is equivalent to adding a clutch, and especially has good effect on automatically stopping vehicles; the slope car backing, the slope parking and the uphill starting have good effects, related accidents are greatly reduced, and the driving safety is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. An auxiliary brake device (20), comprising:

the operating part (21), the said operating part (21) is set up in a circle of grooves (22) of the steering wheel (10) along the direction of circumference, and its every position can move under the influence of pressure;

the detector (25) is arranged on one side of the operating element (21) along the circumferential direction, and the detection part of the detector (25) can generate a first signal in the process of moving the corresponding part on the operating element (21).

2. An auxiliary brake device (20) according to claim 1,

the operating part (21) is a complete ring-shaped object or a strip-shaped object which is divided into a plurality of sections,

when the operating part (21) is a ring-shaped object, the part of the ring-shaped object can be deformed under the action of pressure;

when the operating part (21) is a strip, the part of the strip can move under the action of pressure.

3. An auxiliary brake device (20) as claimed in claim 1, wherein the operating member (21) is arranged in two layers in the direction of the axis of rotation of the steering wheel (10).

4. Auxiliary brake device (20) according to claim 1, characterized in that the recess (22) in the steering wheel (10) opens on the inside or on the top side of the surface of the steering wheel (10).

5. An auxiliary brake device (20) as claimed in claim 1, further comprising:

a switch which is arranged on one side of the operating element (21) and the contact of which can open/close the working circuit of the detector (25);

a vibrator (28), wherein the vibrator (28) is arranged on one side of the operating element (21), and a vibration end of the vibrator can generate a first vibration force and a second vibration force;

6. An auxiliary brake device (20) as claimed in claim 1, further comprising:

the limiting piece (27) is arranged on the groove wall close to the groove opening in the groove (22), and the position of the limiting piece (27) can move to a corresponding position under the action of pressure so as to adjust the extending width of the groove (22).

7. An auxiliary brake device (20) as claimed in claim 1, further comprising:

the baffle is movably arranged on the steering wheel (10) and can seal or expose the groove (22) on the steering wheel (10).

8. A steering wheel assembly, comprising:

the steering wheel comprises a steering wheel (10), wherein a circle of grooves (22) for fingers (31) to extend into are formed in the surface of the steering wheel (10);

an auxiliary brake device (20) as claimed in claim 1.

9. An auxiliary braking method, comprising:

under the condition that a first preset condition is met, acquiring a first signal, wherein the first signal is a pressure signal or a displacement signal;

judging whether the first signal exceeds a first preset value or not, and if so, generating a first signal response signal; the first signal response signal comprises a throttle open circuit signal and a brake force signal matched with the first signal; the first preset condition and the first preset value are preconfigured.

10. An auxiliary braking method as claimed in claim 9,

the first preset condition includes:

11. An auxiliary braking method according to claim 9, further comprising:

judging whether the second signal exceeds a third preset value, if so, generating a second signal response signal, wherein the second signal response signal comprises an accelerator open circuit signal and a brake force signal matched with the second signal; the third preset value is greater than the first preset value, and the second preset condition and the third preset value are preconfigured.

12. An auxiliary braking method as claimed in claim 11,

the second preset condition includes:

if not, the second preset condition is met, and the third preset condition is configured in advance.

13. An auxiliary braking method as claimed in claim 11,

acquiring a third signal under the condition that the second signal exceeds a third preset value, wherein the third signal is a pressure signal or a displacement signal;

14. An auxiliary braking method according to claim 11, further comprising:

under the condition that the first signal is reduced to zero within a first preset time and the angle signal of the steering wheel (10) is detected, the braking force signal is continuously output and the braking force is gradually reduced to zero within a second preset time;

and under the condition that the second signal is reduced to zero within the first preset time and the angle signal of the steering wheel (10) is detected, continuously outputting the braking force signal and gradually reducing the braking force to zero within the second preset time, wherein the second preset time is preset.

15. An auxiliary braking method according to claim 11, further comprising:

acquiring a current vehicle speed and an accelerator signal;

16. An auxiliary braking method according to any one of claims 11 to 15 further including:

the method for generating the brake force signal comprises the following steps:

17. An auxiliary braking method according to claim 11, further comprising:

18. An auxiliary braking method as claimed in claim 17,

the third preset condition includes:

19. An auxiliary braking system (100), comprising:

the device comprises an acquisition module (200) for acquiring a first signal under the condition that a first preset condition is met, wherein the first signal is a pressure signal or a displacement signal;

the control module (300) is used for judging whether the first signal exceeds a first preset value or not, and if so, generating a first signal response signal, wherein the first signal response signal comprises an accelerator open circuit signal and a brake force signal matched with the first signal; the first preset condition and the first preset value are preconfigured.

20. An auxiliary braking system (100) as set forth in claim 19,

the acquisition module (200) is further configured to acquire a second signal under the condition that a second preset condition is met, where the second signal is a pressure signal or a displacement signal;

the control module (300) is further configured to determine whether the first signal exceeds a third preset value, and if so, generate a first signal response signal; the third preset value is greater than the first preset value, and the second preset condition and the third preset value are preconfigured.

21. A motor vehicle, comprising: a steering wheel assembly as claimed in claim 8.

22. A motor vehicle, comprising: an auxiliary braking system (100) as set forth in claim 19.