CN109849878B - Pressing type emergency braking device and method for new energy automobile - Google Patents
Pressing type emergency braking device and method for new energy automobile Download PDFInfo
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- CN109849878B CN109849878B CN201811347729.0A CN201811347729A CN109849878B CN 109849878 B CN109849878 B CN 109849878B CN 201811347729 A CN201811347729 A CN 201811347729A CN 109849878 B CN109849878 B CN 109849878B
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Abstract
The invention discloses a downward-pressing type emergency braking device and a braking method for a new energy automobile. The invention can greatly reduce the safety accidents possibly caused by misjudging the brake pedal and the accelerator pedal, and has high practical value.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a press-down emergency braking device and a braking method for a new energy automobile.
Background
The existing emergency braking mode adopts a mode that a person steps on a brake pedal to realize braking. However, many drivers, especially novices, are usually very nervous when meeting accidents, so that the situation that a brake pedal and an accelerator pedal are mixed easily occurs, and meanwhile, the drivers often take more strength to step on the accelerator in an emergency due to operation inertia, so that accidents are caused. Chinese patent publication No. CN106240538A, published as 2016 (12/21/2016), discloses an acceleration and braking device attached to a steering wheel of a vehicle, which can accelerate or brake the vehicle by hand movements, and since the conventional pedal-type accelerator pedal and brake pedal are heavy in burden on legs during long-time driving, leg fatigue and joint discomfort are likely to occur, and the acceleration and braking are designed by pedaling with the right foot, many drivers are forced to mistakenly brake the accelerator, which results in many disastrous pain. The design of the acceleration and brake equipment of this structure can not only be with work transfer to the hand under the tired condition of shank to the switching in turn of trick alleviates the burden, and honors more hommizedly in the design: under tension, ordinary people are used to pinch the fist, and the action is to pinch the steering wheel naturally, so that the braking effect is achieved naturally, and the vicious event that the accelerator is mistakenly used as the brake is expected to be greatly reduced. According to the structure, a plurality of annular pinching devices are arranged on the steering wheel, and the annular pinching devices are gripped by hands to implement throttle control or braking, but the devices cover the structure of the steering wheel, so that the operation of the steering wheel is influenced when an automobile normally runs.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, a driver of an automobile is nervous and cannot well identify a brake pedal or misjudge the brake pedal and an accelerator pedal, and provides a press-down type emergency braking device and a braking method for a new energy automobile.
The invention adopts a specific scheme that the downward-pressing type emergency braking device for the new energy automobile comprises a steering wheel, wherein the steering wheel is arranged at the upper end part of a steering shaft and can slide in the axial direction of the steering shaft, a pressure sensor is arranged between the steering wheel and a steering column, when the steering wheel is pressed downwards, a wheel seat of the steering wheel is abutted against the pressure sensor, the pressure sensor is connected with a Vehicle Control Unit (VCU) of the automobile, the vehicle control unit is connected with a braking system and a wheel speed sensor of the automobile, and when the pressure value on the pressure sensor is larger than a preset braking pressure value and the wheel speed value is larger than a preset wheel speed value, the vehicle control unit implements emergency braking on the automobile through the braking system. The steering wheel can slide (slide up and down) in a certain range in the axial direction of the steering shaft, meanwhile, the pressure sensor is arranged between the steering wheel and the steering column and is connected with a whole vehicle controller of the vehicle, when the emergency braking is needed in the running process of the vehicle, the vehicle controller can realize braking by pressing the steering wheel except for normal operations of releasing an accelerator pedal and stepping on the brake pedal and the like, namely when the pressure value on the pressure sensor is larger than a preset braking pressure value and the wheel speed value is larger than a preset wheel speed value (namely the vehicle speed is higher, the vehicle speed is judged by measuring the wheel speed), and the whole vehicle controller can carry out emergency braking on the vehicle through the braking system no matter whether the brake pedal or the accelerator pedal of the vehicle is stepped on or not. Therefore, the problem that in the prior art, a driver of an automobile cannot well identify the brake pedal or misjudge the brake pedal and the accelerator pedal due to stress in accidents is solved, and safety accidents possibly caused by misjudging the brake pedal and the accelerator pedal are greatly reduced.
Preferably, the pressure sensor is of an annular structure, and is fixed to an upper end portion of the steering column or an upper end portion of the steering column cover, and the bottom surface of the seat of the steering wheel faces an upper end surface (pressure-sensitive surface) of the pressure sensor. The pressure sensor with the circular ring structure occupies a small space, is convenient to install, can be installed without greatly changing the original automobile structure, and is convenient and fast. In addition, the annular pressure sensor is thin in thickness, high in precision and stability and capable of accurately measuring the down force of the steering wheel. The pressure sensor may be fixed at the upper end of the steering column or the upper end of the steering column shroud depending on the vehicle structure.
Preferably, a shaft hole is formed in a disc seat of the steering wheel, the upper end of the steering shaft is arranged in the shaft hole, a waist-shaped hole perpendicular to the shaft hole is formed in the steering shaft, and a fixing bolt used for fixing the steering wheel is arranged on the disc seat and penetrates through the waist-shaped hole. The waist-shaped hole on the steering shaft can enable the steering wheel to have a certain sliding space on the steering shaft, and the pressure sensor can be extruded when the steering wheel is pressed down due to the existence of the sliding space, so that emergency braking can be implemented through the whole vehicle controller.
Preferably, the shaft hole is a blind hole, an inner reset spring is arranged between the bottom of the shaft hole and the end part of the steering shaft, the movable distance of the fixing bolt in the axial direction of the steering shaft is 3-5 mm (namely, the length of the waist-shaped hole in the axial direction of the steering shaft is 3-5 mm larger than the diameter of the fixing bolt), and when the steering wheel is at the highest position, the distance between the bottom surface of the steering wheel seat and the upper end surface of the pressure sensor is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft. The inner reset spring can enable the steering wheel which is pressed downwards to achieve braking to move upwards to leave the pressure sensor, the phenomenon that the pressure sensor is extruded to cause misoperation due to the fact that the steering wheel rotates when the steering wheel normally runs is avoided, the resilience force of the inner reset spring is only used for pushing the steering wheel away, the force is far smaller than the pressing force of the steering wheel during emergency braking, and therefore the influence on the emergency braking state is not large, or the influence of the resilience force is considered when the braking pressure value is preset. The slidable distance of the steering wheel in the axial direction of the steering shaft is small, the steering wheel is slightly pressed down to contact with the pressure sensor, and the response is quick and sensitive; and the distance between the bottom surface of the seat of the steering wheel and the upper end surface of the pressure sensor is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft, so that the bottom surface of the seat and the pressure sensor can be ensured to be in close contact when the steering wheel is pressed down.
Preferably, an outer return spring is provided between the bottom surface of the seat of the steering wheel and the upper end surface of the pressure sensor, an upper end of the outer return spring is in contact with the bottom surface of the seat of the steering wheel, and a lower end of the outer return spring is in contact with the upper end surface of the pressure sensor. The structural style that sets up reset spring in the aforementioned shaft hole also can replace with outer reset spring, and the disk seat bottom surface of steering wheel passes through outer reset spring butt pressure sensor promptly, and when outer reset spring only was used for the steering wheel to reset, similar with aforementioned scheme, outer reset spring's compressible length is shorter and resilience force is far less than the overdraft of steering wheel when emergency braking, can make the steering wheel easily push down like this, and the reaction is sensitive rapidly.
Preferably, the movable distance of the fixing bolt in the axial direction of the steering shaft is 8-15 mm (namely, the length of the kidney-shaped hole in the axial direction of the steering shaft is 8-15 mm larger than the diameter of the fixing bolt), when the steering wheel is at the highest position, the compressible length of the outer return spring is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft, and the maximum resilience force of the outer return spring (namely, the elastic force when the spring is compressed to the limit position) is 50-110% of the preset brake pressure value of the downward-pressing type emergency brake device. The slidable distance of the steering wheel in the axial direction of the steering shaft is relatively large, and the steering wheel has an obvious pressing stroke when the pressing brake is used, so that the driver can be effectively reminded of paying attention to clearly feel the pressing brake step which is implemented, the action and the action amplitude of the pressing brake are confirmed, and the action expectation of the driver is clear. Different with the simple steering wheel resets, can select the great spring of resilience force for use in the practicality among this technical scheme, can select outer reset spring's the biggest resilience force (be the elasticity when spring compression to extreme position) to predetermine 50% to 110% of brake pressure value for pushing down formula emergency braking device in the practicality. The compressible length of the outer return spring is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft, so that the bottom surface of the disc seat can be in close contact with the pressure sensor when the steering wheel is pressed down. In addition, the inner return spring and the outer return spring can be used independently and simultaneously.
Preferably, the outer return spring is in a circular ring shape, a plurality of elastic sheets which obliquely tilt towards the same side are arranged on the circular ring surface of the outer return spring, the elastic sheets are annularly arranged on the circular ring surface, and the outer return spring is in a homogeneous and integrated structure. The outer reset spring of the homogeneous integral structure is made of an elastic metal sheet through stamping, and the outer reset spring of the structure is of a planar structure under the limit pressure, so that the bottom surface of the steering wheel seat is abutted against the pressure sensor through the outer reset spring and transmits the pressure.
Preferably, the press-down emergency braking device further comprises an alarm, and the alarm is connected with the whole vehicle controller. The alarm can play a role in reminding or warning the driver when the driver has certain wrong actions.
The braking method of the press-down emergency braking device for the new energy automobile comprises the following steps:
a. when the pressure value on the pressure sensor exceeds half of the preset brake pressure value, the whole vehicle controller sends out a warning sound for starting pressing and braking of a steering wheel through an alarm; the prompt tone prompts the driver to press the steering wheel, and avoids the accidental start of the press-down emergency braking device during normal driving.
b. When the pressure value on the pressure sensor is larger than or equal to the preset brake pressure value, the vehicle control unit obtains the highest control authority and judges the vehicle speed through the wheel speed value of the wheel speed sensor;
c. when the vehicle speed value is smaller than a preset braking vehicle speed value, the vehicle controller prompts the misoperation of a vehicle driver through an alarm;
d. when the vehicle speed value is greater than or equal to a preset braking vehicle speed value, the vehicle control unit implements emergency braking on the vehicle through the braking system;
wherein the preset brake pressure value is between 500 and 600 newtons; the preset braking speed is between 50 and 60 kilometers per hour.
Preferably, the vehicle control unit is connected with a vehicle motor, and when the vehicle control unit applies emergency braking to the vehicle through the braking system, the vehicle control unit sends a back-dragging signal to the vehicle motor, and the motor performs back-dragging operation. The motor performs the back-dragging operation to stop the automobile quickly.
The invention has the beneficial effects that: the invention effectively solves the problems that in the prior art, the brake pedal cannot be well identified or the brake pedal and the accelerator pedal are misjudged due to the fact that an automobile driver is nervous in accidents, can greatly reduce safety accidents possibly caused by misjudging the brake pedal and the accelerator pedal, and has high practical value.
Drawings
Fig. 1 is a schematic overall structure diagram of a press-down emergency braking device for a new energy automobile according to the present invention;
fig. 2 is a partial structural sectional view of a press-down type emergency braking device for a new energy automobile according to the present invention;
fig. 3 is another partial structural sectional view of the press-down type emergency braking device for the new energy automobile according to the present invention;
fig. 4 is a structural plan view of an outer return spring of the press-down emergency braking device for the new energy automobile.
In the figure: 1. the steering wheel comprises a steering wheel body, 2 steering shafts, 3 steering columns, 4 pressure sensors, 5 disc seats, 6 shaft holes, 7 waist-shaped holes, 8 fixing bolts, 9 inner reset springs, 10 outer reset springs, 11 circular ring surfaces, 12 elastic sheets and 13 steering column fixing seats.
Detailed Description
The following is a further description of the embodiments of the present invention by way of examples and with reference to the accompanying drawings.
Example 1
In embodiment 1 shown in fig. 1 and 2, a push-down emergency braking device for a new energy vehicle includes a steering wheel 1, the steering wheel is disposed at an upper end portion of a steering shaft 2 and can slide in an axial direction of the steering shaft, a steering column 3 is fixed on a steering column fixing seat 13, a pressure sensor 4 is disposed between the steering wheel and the steering column, the pressure sensor is of an annular structure, the pressure sensor is fixed at an upper end portion of the steering column or an upper end portion of a steering column shield, and a bottom surface of a seat of the steering wheel is opposite to an upper end surface (i.e., a pressure sensing surface) of the pressure sensor. When the steering wheel is pressed down, a wheel seat 5 of the steering wheel is abutted against a pressure sensor, the pressure sensor is connected with a vehicle control unit (namely VCU) of the automobile, the vehicle control unit is connected with a braking system, a wheel speed sensor and an automobile motor of the automobile, and when a pressure value on the pressure sensor is greater than a preset braking pressure value and a wheel speed value is greater than a preset wheel speed value, the vehicle control unit implements emergency braking on the automobile through the braking system; the press-down emergency braking device further comprises an alarm, and the alarm is connected with the whole vehicle controller.
Be equipped with shaft hole 6 in the dish seat of this embodiment steering wheel, steering spindle upper end set up in the shaft hole, be equipped with on the steering spindle with shaft hole vertically waist shape hole 7 is equipped with the fixing bolt 8 that is used for fixed steering wheel on the dish seat, fixing bolt passes waist shape hole. The shaft hole is the blind hole, is equipped with interior reset spring 9 between shaft hole bottom and the steering spindle tip, fixing bolt is 4 millimeters (the epaxial length of waist shape hole at the steering spindle is greater than fixing bolt's diameter 4 millimeters promptly), when the steering wheel was in the highest position, the distance (this embodiment is 2.5 millimeters) between the disk seat bottom surface of steering wheel and pressure sensor's the up end was less than fixing bolt at the epaxial movable distance of steering spindle.
Example 2
In embodiment 2 shown in fig. 3, an outer return spring 10 is arranged between the bottom surface of the seat of the steering wheel and the upper end surface of the pressure sensor, the outer return spring is ring-shaped, a plurality of elastic pieces 12 (see fig. 4) tilted to the same side are arranged on a ring surface 11 of the outer return spring, the elastic pieces are annularly arranged on the ring surface, and the outer return spring is of a homogeneous integral structure and is made of elastic metal pieces through stamping. The upper end of the outer reset spring is abutted against the bottom surface of the steering wheel seat, and the lower end of the outer reset spring is abutted against the upper end surface of the pressure sensor.
The movable distance of the fixing bolt in the axial direction of the steering shaft is 12 mm (namely, the length of the kidney-shaped hole in the axial direction of the steering shaft is 12 mm larger than the diameter of the fixing bolt), when the steering wheel is located at the highest position, the compressible length of the outer return spring is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft (10 mm in the embodiment), the maximum resilience force of the outer return spring (namely, the elastic force when the spring is compressed to the limit position) is 80% of the preset brake pressure value of the downward-pressing emergency brake device, and the rest is the same as that in embodiment 1.
The braking method of the press-down emergency braking device for the new energy automobile comprises the following steps:
a. when the pressure value on the pressure sensor exceeds half of the preset braking pressure value (the pressure value exceeds 280 newtons in the embodiment), the vehicle control unit sends out a steering wheel pressing braking starting prompt tone through the alarm;
b. when the pressure value on the pressure sensor is greater than or equal to a preset brake pressure value (560 newtons in the embodiment), the vehicle control unit obtains the highest control authority and determines the vehicle speed through the wheel speed value of the wheel speed sensor;
c. when the vehicle speed value is smaller than a preset braking vehicle speed value (in the embodiment, the vehicle speed value is smaller than 56 kilometers per hour), the vehicle controller prompts the misoperation of a vehicle driver through an alarm;
d. when the vehicle speed value is greater than or equal to a preset braking vehicle speed value (in this embodiment, greater than 56 kilometers per hour), the vehicle controller implements emergency braking on the vehicle through the braking system.
When the vehicle control unit applies emergency braking to the vehicle through the braking system, the vehicle control unit sends a back-dragging signal to a motor of the vehicle, and the motor performs back-dragging operation.
The steering wheel can slide in a certain range in the axial direction of the steering shaft, and the pressure sensor is arranged between the steering wheel and the steering column and is connected with a vehicle control unit of the vehicle. Therefore, the problem that in the prior art, a driver of an automobile cannot well identify the brake pedal or misjudge the brake pedal and the accelerator pedal due to stress in accidents is solved, and safety accidents possibly caused by misjudging the brake pedal and the accelerator pedal are greatly reduced.
In addition to the above embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.
Claims (6)
1. A downward-pressing type emergency braking device for a new energy automobile comprises a steering wheel and is characterized in that the steering wheel (1) is arranged at the upper end of a steering shaft (2) and can slide in the axial direction of the steering shaft, a pressure sensor (4) is arranged between the steering wheel and a steering column (3), when the steering wheel is pressed downward, a wheel seat (5) of the steering wheel is abutted against the pressure sensor, the pressure sensor is connected with a whole automobile controller of the automobile, the whole automobile controller is connected with a braking system and a wheel speed sensor of the automobile, and when a pressure value on the pressure sensor is larger than a preset braking pressure value and the wheel speed value is larger than a preset wheel speed value, the whole automobile controller implements emergency braking on the automobile through the braking system; the pressure sensor is of an annular structure, the pressure sensor is fixed at the upper end part of the steering column or the upper end part of the steering column shield, and the bottom surface of the steering wheel seat is opposite to the upper end surface of the pressure sensor; a shaft hole (6) is formed in a disc seat of the steering wheel, the upper end of the steering shaft is arranged in the shaft hole, a waist-shaped hole (7) perpendicular to the shaft hole is formed in the steering shaft, a fixing bolt (8) for fixing the steering wheel is arranged on the disc seat, and the fixing bolt penetrates through the waist-shaped hole; an outer reset spring (10) is arranged between the bottom surface of the steering wheel seat and the upper end surface of the pressure sensor, the upper end of the outer reset spring is abutted against the bottom surface of the steering wheel seat, and the lower end of the outer reset spring is abutted against the upper end surface of the pressure sensor; the movable distance of the fixing bolt in the axial direction of the steering shaft is 8-15 mm, when the steering wheel is located at the highest position, the compressible length of the outer return spring is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft, and the maximum resilience force of the outer return spring is 50% -110% of the preset brake pressure value of the downward-pressing type emergency brake device.
2. The push-down emergency brake device for the new energy automobile as claimed in claim 1, wherein the shaft hole is a blind hole, an inner return spring (9) is disposed between a bottom of the shaft hole and an end of the steering shaft, a movable distance of the fixing bolt in an axial direction of the steering shaft is 3-5 mm, and a distance between a bottom surface of a seat of the steering wheel and an upper end surface of the pressure sensor is smaller than the movable distance of the fixing bolt in the axial direction of the steering shaft when the steering wheel is at the highest position.
3. The downward-pressing emergency braking device for the new energy automobile as claimed in claim 1, wherein the outer return spring is circular, a plurality of elastic pieces (12) tilted to the same side are arranged on a circular ring surface (11) of the outer return spring, the elastic pieces are annularly arranged on the circular ring surface, and the outer return spring is of a homogeneous and integral structure.
4. The downward-pressing emergency braking device for the new energy automobile according to any one of claims 1 to 3, wherein the downward-pressing emergency braking device further comprises an alarm, and the alarm is connected with the whole automobile controller.
5. The braking method of the press-down emergency braking device for the new energy automobile according to claim 1, characterized by comprising the steps of:
a. when the pressure value on the pressure sensor exceeds half of the preset brake pressure value, the whole vehicle controller sends out a warning sound for starting pressing and braking of a steering wheel through an alarm;
b. when the pressure value on the pressure sensor is larger than or equal to the preset brake pressure value, the vehicle control unit obtains the highest control authority and judges the vehicle speed through the wheel speed value of the wheel speed sensor;
c. when the vehicle speed value is smaller than a preset braking vehicle speed value, the vehicle controller prompts the misoperation of a vehicle driver through an alarm;
d. when the vehicle speed value is greater than or equal to a preset braking vehicle speed value, the vehicle control unit implements emergency braking on the vehicle through the braking system;
wherein the preset brake pressure value is between 500 and 600 newtons; the preset braking speed is between 50 and 60 kilometers per hour.
6. The braking method of the press-down emergency braking device for the new energy automobile as claimed in claim 5, wherein the vehicle control unit is connected to an automobile motor, and when the vehicle control unit applies emergency braking to the automobile through the braking system, the vehicle control unit sends a back-dragging signal to the automobile motor, and the motor performs back-dragging operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347729.0A CN109849878B (en) | 2018-11-13 | 2018-11-13 | Pressing type emergency braking device and method for new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347729.0A CN109849878B (en) | 2018-11-13 | 2018-11-13 | Pressing type emergency braking device and method for new energy automobile |
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| Publication Number | Publication Date |
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| CN109849878A CN109849878A (en) | 2019-06-07 |
| CN109849878B true CN109849878B (en) | 2020-09-18 |
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| CN201811347729.0A Active CN109849878B (en) | 2018-11-13 | 2018-11-13 | Pressing type emergency braking device and method for new energy automobile |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110667689A (en) * | 2019-11-27 | 2020-01-10 | 张兆琦 | Steering wheel with braking function and control device with steering wheel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3835726A1 (en) * | 1988-10-20 | 1990-04-26 | Waldemar Mueller | Steering wheel contact sensor ring switch for controlling optical/acoustic warning systems, engine shut-off devices and emergency braking devices on motor vehicles of all kinds |
| CN1272204C (en) * | 2003-09-09 | 2006-08-30 | 重庆大学 | Automobile convenient driving device and microcomputer controlling method thereof |
| US7280046B2 (en) * | 2005-06-15 | 2007-10-09 | Delphi Technologies, Inc. | Steering system with haptic driver warning |
| CN201151381Y (en) * | 2008-01-28 | 2008-11-19 | 王乐群 | Both-hand operation controller for throttle and brake of automobile |
| CN202518255U (en) * | 2012-04-24 | 2012-11-07 | 河海大学 | Emergency braking intelligent auxiliary system for automotive vehicle |
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Address after: 310051 1st and 6th floors, no.451 Internet of things street, Binjiang District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Zero run Technology Co.,Ltd. Address before: 310051 1st and 6th floors, no.451 Internet of things street, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG LEAPMOTOR TECHNOLOGY Co.,Ltd. |