阅读说明：本技术 一种汽车制动回馈方法、装置及车辆 (Automobile brake feedback method and device and vehicle ) 是由 张剑锋 苍松 王明君 卢继飞 姜博 于 2019-10-08 设计创作，主要内容包括：本发明公开了一种汽车制动回馈方法,所述制动回馈方法包括：当获得制动指令时,接收数据信息,其中,所述数据信息包括本车与前车间距离、本车的车速和本车的加速度；根据所述数据信息计算出最大化电回馈扭矩；判断所述最大化电回馈扭矩是否大于电机能力；若否,则控制电机输出负扭矩,制动车辆。采用本发明公开的制动回馈方法及装置,增加了微波雷达检测本车与前车间距离,并结合速度和加速度准确计算出安全距离和最大化电回馈扭矩,不仅能够达到减速的目的,而且充分利用了电机的能力,减少了制动卡钳的使用,实现了电能量回收的最大化,此外,三个微波雷达的布局合理,适用于环岛和复杂道路,既提高了测试效率和精度,又弥补了单一雷达的缺陷。(The invention discloses an automobile brake feedback method, which comprises the following steps: when a braking instruction is obtained, receiving data information, wherein the data information comprises the distance between the vehicle and the front vehicle, the vehicle speed of the vehicle and the acceleration of the vehicle; calculating the maximum electric feedback torque according to the data information; judging whether the maximum electric feedback torque is larger than the motor capacity; if not, the motor is controlled to output negative torque to brake the vehicle. By adopting the brake feedback method and the device disclosed by the invention, the microwave radars are added for detecting the distance between the vehicle and the front vehicle, and the safe distance and the maximum electric feedback torque are accurately calculated by combining the speed and the acceleration, so that the aim of reducing the speed can be fulfilled, the capability of the motor is fully utilized, the use of brake calipers is reduced, the maximization of electric energy recovery is realized, in addition, the layout of the three microwave radars is reasonable, the method and the device are suitable for roundabouts and complex roads, the test efficiency and the test precision are improved, and the defect of a single radar is overcome.)

1. The automobile brake feedback method is characterized by comprising the following steps:

when a braking instruction is obtained, receiving data information, wherein the data information comprises the distance between the vehicle and the front vehicle, the vehicle speed of the vehicle and the acceleration of the vehicle;

calculating the maximum electric feedback torque according to the data information;

judging whether the maximum electric feedback torque is larger than the motor capacity;

if not, the motor is controlled to output negative torque to brake the vehicle.

2. The vehicle brake feedback method according to claim 1, wherein the control motor outputs a negative torque, and the vehicle brake feedback method further comprises:

and controlling the motor to charge the power battery.

3. The vehicle brake feedback method according to claim 1, wherein the control motor outputs a negative torque, and the vehicle brake feedback method further comprises:

and (4) separating the clutch at the end of the engine, and controlling the engine to stop outputting power.

4. The brake feedback method for vehicle according to claim 1, wherein the step of braking the vehicle comprises:

calculating a safety distance according to the data information;

and controlling the vehicle to decelerate and controlling the vehicle to keep a safe distance with a front vehicle.

5. The vehicle brake feedback method according to claim 1, wherein the brake feedback method further comprises, before receiving the data information when the brake command is obtained:

and measuring the distance between the vehicle and the front vehicle, and acquiring the vehicle speed and the acceleration of the vehicle.

6. An automobile brake feedback device, characterized in that, the automobile brake feedback device includes:

a data receiving unit for receiving data information;

the data processing unit is used for calculating a safety distance and a maximum electric feedback torque;

the judging unit is used for judging whether the maximum electric feedback torque is larger than the motor capacity;

and the control unit is used for controlling the motor to output negative torque to brake the vehicle or controlling the brake calipers to output brake torque to brake the vehicle.

7. The brake feedback device of claim 6, wherein the control unit further comprises:

a charging unit: the motor is used for controlling the motor to charge the power battery;

a clutch unit: for disengaging the engine-end clutch.

8. The brake feedback device of claim 6, further comprising:

a distance measurement unit: the distance measuring device is used for measuring the distance between the vehicle and the front vehicle;

a data acquisition unit: the method is used for acquiring the speed of the vehicle and the acceleration of the vehicle.

9. The vehicle brake feedback device of claim 8, wherein the ranging unit comprises three microwave radars;

the three microwave radars are respectively arranged at the right front part and two sides of the vehicle.

10. A vehicle, characterized in that the vehicle comprises a vehicle body, a power battery and the brake feedback device of any one of the preceding claims 6 to 9;

the power battery is disposed on the vehicle body.

Technical Field

The invention relates to the field of electronic appliances and new energy, in particular to an automobile brake feedback method, an automobile brake feedback device and an automobile.

Background

In the running process of the vehicle, due to the fact that the vehicle speed is not matched with the road condition, the road condition changes, the occurrence of an emergency and other factors interfere, the situation that a braking system of the vehicle needs to be started is avoided, the vehicle is forced to decelerate or even stop according to the requirements of a driver, the stopped vehicle is stably parked under various road conditions, the speed of the vehicle running on a downhill is kept stable, and the safety of the driver is guaranteed.

It is known that, in the process of forcing the vehicle to decelerate or even stop, controlling the stopped vehicle to park stably, and controlling the vehicle running downhill to keep stable speed, it is necessary to reduce the kinetic energy of the vehicle, convert the kinetic energy into braking kinetic energy and heat energy generated by the friction between the tires and the ground, and dissipate the kinetic energy into the air. The converted energy cannot be recycled, and is easy to cause environmental pollution.

In recent years, in order to respond to the call of national regulatory authorities for energy conservation, environmental protection and pollution reduction, most automobile manufacturers concentrate on developing and developing a method for converting an internal combustion automobile into an oil-electricity hybrid automobile or a pure electric automobile, and additionally arranging a sliding energy recovery system and a braking energy recovery system in the manufacturing process of the oil-electricity hybrid automobile and the pure electric automobile so as to reduce energy waste. In the prior art, a common energy recovery mode calculates energy recovery torque according to vehicle speed and the opening degree of a brake pedal, and then provides brake torque through a brake caliper to control the vehicle to decelerate, however, the mode cannot recover electric energy, cannot realize maximization of energy feedback, and cannot accurately brake under the conditions of lane change, complex road conditions and complex traffic conditions of the vehicle.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an automobile brake feedback device, which solves the problems of maximization of energy feedback, low braking efficiency and poor braking effect in the prior art by calculating an energy recovery torque acquisition method according to the speed and the opening degree of a brake pedal.

In order to solve the technical problem, the invention provides an automobile brake feedback method, which comprises the following steps:

when a braking instruction is obtained, receiving data information;

calculating the maximum electric feedback torque according to the data information;

judging whether the maximum electric feedback torque is larger than the motor capacity;

if not, the motor is controlled to output negative torque to brake the vehicle.

Specifically, the data information includes a distance between the host vehicle and a front vehicle, a vehicle speed of the host vehicle, and an acceleration of the host vehicle;

further, the motor is controlled to output negative torque, and the automobile brake feedback method further comprises the step of controlling the motor to charge the power battery.

Further, the motor is controlled to output negative torque, and the automobile brake feedback method further comprises the step of separating an engine end clutch and controlling the engine to stop outputting power.

Specifically, the step of braking the vehicle comprises the steps of calculating a safe distance according to the data information, controlling the vehicle to decelerate, and controlling the vehicle to keep a safe distance with a front vehicle.

Further, when the braking instruction is obtained and before the data information is received, the braking feedback method further includes measuring a distance between the vehicle and a front vehicle, and acquiring a vehicle speed of the vehicle and an acceleration of the vehicle.

Correspondingly, the invention also provides an automobile brake feedback device, which comprises:

a data receiving unit for receiving data information;

the data processing unit is used for calculating a safety distance and a maximum electric feedback torque;

the judging unit is used for judging whether the maximum electric feedback torque is larger than the motor capacity;

and the control unit is used for controlling the motor to output negative torque to brake the vehicle or controlling the brake calipers to output brake torque to brake the vehicle.

Further, the control unit further includes:

a charging unit: the motor is used for controlling the motor to charge the power battery;

a clutch unit: for disengaging the engine-end clutch.

Further, the brake feedback device further comprises:

a distance measurement unit: the distance measuring device is used for measuring the distance between the vehicle and the front vehicle;

a data acquisition unit: the method is used for acquiring the speed of the vehicle and the acceleration of the vehicle.

Preferably, the ranging unit comprises three microwave radars; the three microwave radars are respectively arranged right in front of and at two sides of the vehicle.

Correspondingly, the invention also provides a vehicle, which comprises a vehicle body, a power battery and any brake feedback device; the power battery is disposed on the vehicle body.

The embodiment of the invention has the following beneficial effects:

according to the automobile brake feedback method disclosed by the invention, the microwave radars are added for detecting the distance between the automobile and the front vehicle, the safe distance and the maximum electric feedback torque are accurately calculated by combining the speed and the acceleration, the purpose of speed reduction can be achieved, the capability of a motor is fully utilized, the use of brake calipers is reduced, the maximization of electric energy recovery is realized, in addition, the layout of the three microwave radars is reasonable, the method is suitable for roundabouts and complex roads, the test efficiency and the test precision are improved, and the defect of a single radar is overcome.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic flow chart illustrating a method for feedback of braking of an automobile according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an automobile brake feedback device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It should be apparent that the described embodiment is only one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that reference herein to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "front", "side", "upper", and the like, indicate an orientation or positional relationship for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "comprises" and "comprising," and their derivatives, are intended to cover a non-exclusive inclusion, such that a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such steps or elements.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.