Automobile emergency braking control method and device

Abstract

The application belongs to the technical field of emergency brake system, and discloses a kind of automobile emergency brake control method and device, the automobile emergency brake control method includes: setting multiple pressure sensors on steering wheel to detect the grip threshold P of driver emergency brake n When the grip threshold is P1, the vehicle is set to have a first brake mode, when the grip threshold is P2, the vehicle is set to have a second brake mode, and when the grip threshold is P X N brake mode, based on the size of the maximum grip of different drivers, different brake modes are selected, the pressure sensor obtains the current grip of the driver on the steering wheel, when the current grip of the steering wheel is greater than the currently set grip threshold, the pressure sensor transmits the signal to the ECU controller, the ECU controller transmits the signal to the EPB controller, and the EPB controller controls the emergency brake of the vehicle. While the driver holds the steering wheel with both hands to control the direction of the vehicle, the emergency brake function can be simultaneously realized to slow down.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of emergency brake system, in particular to a vehicle emergency braking control method and device. BACKGROUND

[0002] The steering wheel is a device used by the driver to control the direction of the vehicle, and the driver controls the steering or straight driving of the vehicle by operating the steering wheel. The driving brake function during vehicle driving generally includes pedal brake function and emergency brake function. The emergency brake function is an emergency function when the pedal brake fails, and the vehicle is slowed down by emergency braking to ensure driving safety.

[0003] The emergency brake of the vehicle is generally realized by the parking brake system, and the parking control handle (or button) is generally located behind the shift handle. If the pedal brake fails and needs to be slowed down by emergency braking, the driver needs to operate the steering wheel and the parking handle (or button) at the same time to control the vehicle turning and deceleration.

[0004] The traditional hand brake parking handle is limited by the structure after being pulled up. After the driver operates the parking handle to pull it up, both hands can immediately control the steering wheel of the vehicle again. Although the time is short, it still increases the risk of accidents when the vehicle speed is high and the road conditions are complex. And the existing vehicle parking system more and more uses EPB electronic parking system. When the vehicle with EPB system is in emergency braking, the driver needs to continuously operate the EPB button with one hand and cannot release it. In this way, the driver can only operate the steering wheel with one hand for a long time to control the vehicle turning, avoiding pedestrians or vehicles, etc. The operation difficulty is greatly improved compared with normal driving. Especially in the case of high speed and complex road conditions, the driver needs to control the vehicle in time and accurately. At this time, the inconvenience of emergency braking operation and steering operation increases the difficulty of the driver controlling the vehicle, and brings more serious accident risk.

[0005] Therefore, there is an urgent need for a vehicle emergency braking control method and device to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a vehicle emergency braking control method and device, which enables the driver to control the direction of the vehicle with both hands while controlling the emergency brake to decelerate, and realizes the synchronous and accurate operation of the steering wheel and the emergency brake when the pedal brake fails, thereby improving driving safety.

[0007] In order to solve the above problems existing in the prior art, the present application adopts the following technical scheme:

[0008] A vehicle emergency braking control method, comprising:

[0009] Setting a plurality of pressure sensors on the steering wheel to detect the grip threshold P of the driver's emergency braking n(n = 1, 2, …, X), wherein, P1 X ;

[0010] When the grip threshold is P1, the vehicle is set to have a first braking mode, when the grip threshold is P2, the vehicle is set to have a second braking mode, when the grip threshold is P X , the vehicle is set to have an Nth braking mode;

[0011] Different braking modes are selected based on the size of the maximum grip of different drivers;

[0012] The pressure sensor obtains the current grip of the driver on the steering wheel;

[0013] When the current grip of the steering wheel is greater than the currently set grip threshold, the pressure sensor transmits a signal to the ECU controller;

[0014] The ECU controller transmits a signal to the EPB controller;

[0015] The EPB controller controls the emergency braking of the vehicle.

[0016] Preferably, the specific steps of selecting different braking modes based on the size of the maximum grip of different drivers include:

[0017] When the maximum grip of the driver on the steering wheel is greater than P1 and less than P2, the first braking mode is selected, and when the maximum grip of the driver on the steering wheel is greater than P2 and less than P3, the second braking mode is selected.

[0018] Preferably, the specific steps of the pressure sensor obtaining the current grip of the driver on the steering wheel include:

[0019] The driver holds the steering wheel with both hands, and the grip of the hands is transmitted to the pressure sensor;

[0020] The pressure sensor converts the current grip of the steering wheel into a resistance signal.

[0021] Preferably, the specific steps of the pressure sensor transmitting a signal to the ECU controller include:

[0022] The ECU controller receives the resistance signal that changes in real time from the pressure sensor;

[0023] The ECU controller converts the resistance signal into different CAN signals.

[0024] Preferably, the specific steps of the ECU controller transmitting a signal to the EPB controller include:

[0025] The ECU controller transmits the corresponding CAN signal to the EPB controller through the VCU controller;

[0026] The EPB controller receives the different CAN signals and controls the EPB motor to execute or cancel the emergency braking of the vehicle.

[0027] Preferably, the ECU controller transmitting the signal to the EPB controller further comprises:

[0028] The ECU controller transmits the corresponding CAN signal to the instrument panel;

[0029] The instrument panel reminds the driver that the vehicle triggers the emergency braking.

[0030] To achieve the above object, the application further provides an automobile emergency braking control device, comprising a steering wheel, a pressure sensor and an ECU controller, the pressure sensor is arranged on the steering wheel, the pressure sensor is used to detect the current gripping force of the driver on the steering wheel, the pressure sensor is signal connected with the ECU controller, and the ECU controller adopts the automobile emergency braking control method to control the emergency braking of the vehicle.

[0031] Preferably, the number of the pressure sensors is two, the two pressure sensors are arranged along the circumferential direction of the steering wheel, and the two pressure sensors are respectively used to detect the left hand gripping force and the right hand gripping force of the driver.

[0032] Preferably, the steering wheel comprises a framework and an insulating layer, the insulating layer is wrapped on the framework, the insulating layer is arranged between the framework and the pressure sensor, and the insulating layer is made of a high polymer material.

[0033] Preferably, the steering wheel comprises an outer skin covering layer, and the outer skin covering layer surrounds the pressure sensor.

[0034] The automobile emergency braking control method provided by the application sets a plurality of pressure sensors on the steering wheel to detect the gripping force threshold P of the driver in emergency braking. n When the gripping force threshold is P1, the automobile is set to have a first braking mode, when the gripping force threshold is P2, the automobile is set to have a second braking mode, and when the gripping force threshold is P XWhen the vehicle is in the N braking mode, different braking modes are selected based on the size of the maximum grip of the driver himself, the pressure sensor acquires the current grip of the driver on the steering wheel, when the current grip of the steering wheel is greater than the current set grip threshold, the pressure sensor transmits the signal to the ECU controller, the ECU controller transmits the signal to the EPB controller, and the EPB controller controls the emergency braking of the vehicle. The steering wheel can improve the braking performance of the vehicle equipped with the EPB system, reduce the tension and mistakes of the driver when responding to the emergency. The driver can control the emergency braking function by pre-calibrated grip while operating the steering wheel to reduce speed, and when the pedal brake fails, the driver can still conveniently and accurately control the vehicle to change direction and decelerate, improve driving safety and reduce accidents. In the case of a good pedal brake, the braking force of the vehicle during emergency braking can also be increased, and the braking distance can be shortened.

[0035] The automobile emergency braking control device provided by the application comprises a steering wheel, a pressure sensor and an ECU controller. The pressure sensor is arranged on the steering wheel, and is used to detect the current grip of the driver on the steering wheel. The pressure sensor is in signal connection with the ECU controller, and the ECU controller controls the emergency braking of the vehicle by using an automobile emergency braking control method. When emergency braking is needed, the driver holds the steering wheel tightly with both hands, the pressure sensor can convert the hand grip of the driver into a resistance signal, the resistance value gradually decreases with the increase of the grip of the driver, the ECU controller converts the electronic signal output by the pressure sensor into a CAN signal, so that the vehicle can perform emergency braking. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The automobile emergency braking control method provided by the embodiment of the application is shown in the flowchart.

[0037] Figure 2 The automobile emergency braking control method provided by the embodiment of the application is shown in the principle diagram.

[0038] Figure 3 The automobile emergency braking control device provided by the embodiment of the application is shown in the structural schematic diagram.

[0039] REFERENCE NUMERALS

[0040] 100, steering wheel; 101, framework; 102, insulation layer; 103, outer skin covering layer; 200, pressure sensor; 300, ECU controller; 400, EPB controller; 500, EPB motor; 600, VCU controller; 700, instrument panel. DETAILED DESCRIPTION

[0041] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not to be used to limit the application. In addition, it is to be understood that, for ease of description, only the parts related to the application are shown in the drawings.

[0042] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0045] As Figures 1-2 shown, in the present embodiment, a vehicle emergency braking control method comprises the following steps:

[0046] S100: setting a plurality of pressure sensors 200 on the steering wheel 100 to detect the grip threshold P of the driver's emergency braking n (n = 1, 2, …, X), wherein P1 < P2 <, …, < P X .

[0047] The resistance value converted by the pressure sensor 200 is inversely proportional to the hand force of the driver on the steering wheel 100 in a linear relationship, and the hand force threshold for controlling the emergency brake is set through calibration, so as to set a reasonable control hand force. In order to adapt to the great difference in hand force of drivers of different genders and different ages, while ensuring that each driver can normally drive the vehicle, the emergency brake is not easily triggered, and only in an emergency situation, the driver will trigger the emergency brake when holding the steering wheel 100 tightly. Therefore, the hand force threshold is set to have multiple gears, that is, the hand force threshold corresponding to the driver with very small hand force is P1, the hand force threshold corresponding to the driver with very large hand force is P X , and the hand force threshold corresponding to the driver with general hand force is between P1 and P X . According to the difference in the height of the hand force threshold, multiple gears are set for the driver to select.

[0048] S200: When the hand force threshold is P1, the vehicle is set to have a first brake mode, when the hand force threshold is P2, the vehicle is set to have a second brake mode, and when the hand force threshold is P X , the vehicle is set to have an Nth brake mode.

[0049] For example, the vehicle has three brake modes in total, the hand force threshold corresponding to the driver with very small hand force is P1, and the vehicle is in the first brake mode. In an emergency situation, the driver tightly holds the steering wheel 100 under the condition of the maximum hand force of the driver, so as to trigger the emergency brake of the vehicle. Similarly, the hand force threshold corresponding to the driver with general hand force is P2, and the vehicle is in the second brake mode. The hand force threshold corresponding to the driver with very large hand force is P3, and the vehicle is in the third brake mode. The driver can select the hand force threshold corresponding to different brake modes according to the strength of the hand of the driver, and the application range is wide.

[0050] S300: Selecting different brake modes based on the size of the maximum hand force of different drivers.

[0051] S300 specifically includes:

[0052] When the maximum hand force of the driver on the steering wheel 100 is greater than P1 and less than P2, the first brake mode is selected, when the maximum hand force of the driver on the steering wheel 100 is greater than P2 and less than P3, the second brake mode is selected, and similarly, when the maximum hand force of the driver on the steering wheel 100 is greater than P X-1 and less than P X , the Nth brake mode is selected.

[0053] S400: The pressure sensor 200 acquires the current hand force of the driver on the steering wheel 100.

[0054] S400 specifically includes:

[0055] The driver holds the steering wheel 100 with both hands, the hand holding force is transmitted to the pressure sensor 200, the pressure sensor 200 converts the current holding force of the steering wheel 100 into a resistance signal, and then the pressure sensor 200 transmits the synchronously changed resistance signal to the ECU controller 300 through the connection wire harness.

[0056] S500: When the current holding force of the steering wheel 100 is greater than the current set holding force threshold, the pressure sensor 200 transmits a signal to the ECU controller 300.

[0057] S500 specifically includes:

[0058] The ECU controller 300 receives the real-time changed resistance signal of the pressure sensor 200, and the ECU controller 300 converts the resistance signal into different CAN signals.

[0059] S600: The ECU controller 300 transmits a signal to the EPB controller 400.

[0060] S600 specifically includes:

[0061] The ECU controller 300 transmits the corresponding CAN signal to the EPB controller 400 through the VCU controller 600, or the ECU controller 300 transmits the corresponding CAN signal to the EPB controller 400 directly, the ECU controller 300 transmits the corresponding CAN signal to the instrument panel 700 through the connection wire harness and the connector, and the instrument panel 700 reminds the driver that the vehicle has triggered emergency braking through words and sound, and prevents the brake from overheating due to abnormal or fault triggering of emergency braking.

[0062] S700: The EPB controller 400 controls the emergency braking of the vehicle.

[0063] At the same time when the ECU controller 300 transmits the CAN signal to the instrument panel 700, the EPB controller 400 receives the different CAN signal and controls the EPB motor 500 to execute or cancel the emergency braking of the vehicle. By adding the pressure sensor 200 on the steering wheel 100 and cooperating with the communication of the pressure sensor 200 and the related controller, the driver can control the emergency braking function through the pre-calibrated holding force, and then realize the deceleration.

[0064] Optionally, the vehicle adopts a traditional simple resistance type steering wheel 100, the pressure sensor 200 transmits the real-time changed resistance signal to the BCM controller, the BCM controller converts the changed resistance signal into corresponding different CAN signals, and then sends the corresponding different CAN signals to the EPB controller 400, so that the emergency braking can also be finally controlled to be executed or not executed.

[0065] In the embodiment, a vehicle emergency braking control method is provided, a plurality of grip threshold values P of drivers for emergency braking are set by a pressure sensor 200 on a steering wheel 100 n When the grip threshold value is P1, the vehicle is set to have a first braking mode, when the grip threshold value is P2, the vehicle is set to have a second braking mode, and when the grip threshold value is P X N braking mode; different braking modes are selected based on the size of the maximum grip of different drivers; the pressure sensor 200 obtains the current grip of the driver on the steering wheel 100; when the current grip of the steering wheel 100 is greater than the currently set grip threshold value, the pressure sensor 200 transmits a signal to an ECU controller 300; the ECU controller 300 transmits a signal to an EPB controller 400; the EPB controller 400 controls the emergency braking of the vehicle. The steering wheel 100 can improve the braking performance of the vehicle equipped with the EPB system, reduce the tension and mistakes of the driver when responding to the emergency. The driver can control the emergency braking function by pre-calibrated grip while operating the steering wheel 100 to reduce speed, and when the pedal brake fails, the driver can still conveniently and accurately control the vehicle to avoid and decelerate, improve driving safety and reduce accidents. In the case of a good pedal brake, the braking force of the vehicle during emergency braking can also be increased, and the braking distance can be shortened.

[0066] The embodiment also provides a vehicle emergency braking control device, as shown in Figure 3 The vehicle emergency braking control device includes a steering wheel 100, a pressure sensor 200 and an ECU controller 300. The pressure sensor 200 is arranged on the steering wheel 100, the pressure sensor 200 is used to detect the current grip of the driver on the steering wheel 100, the pressure sensor 200 is signal connected with the ECU controller 300, and the ECU controller 300 controls the emergency braking of the vehicle by using the above-mentioned vehicle emergency braking control method. Specifically, the pressure sensor 200 is a flexible pressure sensor 200, which has good flexibility and does not affect the hand feeling of the driver holding the steering wheel 100. The ECU controller 300 is connected with the pressure sensor 200 through a wire harness, when emergency braking is needed, the driver holds the steering wheel 100 with both hands, the pressure sensor 200 can convert the hand grip of the driver into a resistance signal, as the grip of the driver increases, the resistance value gradually decreases, the ECU controller 300 converts the electronic signal output by the pressure sensor 200 into a CAN signal, so that the EPB controller 400 receives the CAN signal and outputs a corresponding control instruction to control the EPB motor 500 to perform emergency braking.

[0067] Further, with reference to Figure 3, the number of pressure sensors 200 is two, two pressure sensors 200 are arranged along the circumferential direction of the steering wheel 100, and two pressure sensors 200 are used to detect the left hand grip force and the right hand grip force of the driver. Specifically, when emergency braking is required, only when two pressure sensors 200 simultaneously detect that the driver holds the steering wheel 100 with both hands, the emergency braking of the vehicle can be triggered, so that the driver controls the direction of the vehicle with both hands, and controls the emergency braking to slow down, realizes the synchronous and accurate operation of the steering wheel 100 and the emergency braking, and improves the driving safety.

[0068] Further, with reference to the above Figure 3 , the steering wheel 100 includes a skeleton 101 and an insulating layer 102, the insulating layer 102 is wrapped on the skeleton 101, the insulating layer 102 is arranged between the skeleton 101 and the pressure sensor 200, and the insulating layer 102 is made of a high polymer material. Specifically, the skeleton 101 is made of a metal material such as magnesium-aluminum alloy, the insulating layer 102 is made of polyurethane material, and the insulating layer 102 is combined with the skeleton 101 as a whole by foaming process. The polyurethane material has good insulation performance and can be used as an insulating layer 102 between the pressure sensor 200 and the skeleton 101.

[0069] Further, with reference to the above Figure 3 , the steering wheel 100 includes an outer skin covering layer 103, and the outer skin covering layer 103 surrounds the pressure sensor 200. Specifically, the outer skin covering layer 103 is made of leather or imitation leather material, and is wrapped on the outer surface of the pressure sensor 200, and then forms a complete outer ring of the steering wheel 100 together with the skeleton 101 and the insulating layer 102.

[0070] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An automobile emergency brake control method characterized by comprising: The application relates to an emergency brake control method and device for a vehicle. A plurality of pressure sensors (200) on a steering wheel (100) are set to detect a grip force threshold value P of a driver in emergency braking n (n = 1, 2,..., X), wherein P1 X ; When the grip threshold value is P1, the vehicle is set to have a first braking mode, when the grip threshold value is P2, the vehicle is set to have a second braking mode, and when the grip threshold value is P X N, the vehicle is set to have an Nth braking mode. Based on the size of the maximum grip of different drivers, different braking modes are selected: when the maximum grip of the driver on the steering wheel (100) is greater than P1 and less than P2, the first braking mode is selected, when the maximum grip of the driver on the steering wheel (100) is greater than P2 and less than P3, the second braking mode is selected, when the maximum grip of the driver on the steering wheel (100) is greater than P X-1 and less than P X , the Nth braking mode is selected; The pressure sensor (200) acquires the current gripping force of the driver on the steering wheel (100); When the current gripping force of the steering wheel (100) is greater than the current set gripping force threshold value, the pressure sensor (200) transmits a signal to an ECU controller (300); The ECU controller (300) transmits a signal to an EPB controller (400); The EPB controller (400) controls the emergency brake of the vehicle.

2. The automobile emergency brake control method according to claim 1, characterized by, The specific steps that the pressure sensor (200) acquires the current gripping force of the driver on the steering wheel (100) include: The driver holds the steering wheel (100) with both hands, and the gripping force of the hands is transmitted to the pressure sensor (200); The pressure sensor (200) converts the current gripping force of the steering wheel (100) into a resistance signal.

3. The automobile emergency brake control method according to claim 1, characterized by, The specific steps that the pressure sensor (200) transmits a signal to the ECU controller (300) include: The ECU controller (300) receives the resistance signal that changes in real time of the pressure sensor (200); The ECU controller (300) converts the resistance signal into different CAN signals.

4. The automobile emergency brake control method according to claim 1, characterized by, The specific steps that the ECU controller (300) transmits a signal to the EPB controller (400) include: The ECU controller (300) transmits the corresponding CAN signals to the EPB controller (400) through a VCU controller (600); The EPB controller (400) receives the different CAN signals and controls the EPB motor (500) to execute or cancel the emergency brake of the vehicle.

5. The automobile emergency brake control method according to claim 4, characterized by The ECU controller (300) transmits a signal to the EPB controller (400) further includes: The ECU controller (300) transmits the corresponding CAN signals to an instrument panel (700); The instrument panel (700) reminds the driver that the vehicle triggers the emergency brake.

6. An automobile emergency brake control device characterized by comprising: The application relates to an emergency brake control method and device for a vehicle.

7. The automobile emergency brake control device according to claim 6, characterized by The number of the pressure sensors (200) is two, the two pressure sensors (200) are arranged along the circumferential direction of the steering wheel (100) at intervals, and the two pressure sensors (200) are respectively used for detecting the left-hand gripping force and the right-hand gripping force of the driver.

8. The automobile emergency brake control device according to claim 6, characterized by The steering wheel (100) comprises a framework (101) and an insulation layer (102), the insulation layer (102) is wrapped on the framework (101), the insulation layer (102) is arranged between the framework (101) and the pressure sensor (200), and the insulation layer (102) is made of a high polymer material.

9. The automobile emergency brake control device according to claim 6, characterized by The steering wheel (100) comprises an outer skin cover (103) which surrounds the pressure sensor (200).

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