Electric two-wheeled vehicle braking method, brake system and electric two-wheeled vehicle

CN117698436BActive Publication Date: 2026-09-25ZHEJIANG CFMOTO POWER CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202211102218.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-09
Publication Date
2026-09-25
Estimated Expiration
2042-09-09

AI Technical Summary

Technical Problem

[0006]在本实施例中提供了一种电动两轮车制动方法、刹车系统和电动两轮车,以解决相关技术中电动两轮车存在制动能量回收低、器件成本高的问题

Benefits of technology

[0018]与相关技术相比,在本实施例中提供的电动两轮车制动方法、刹车系统和电动两轮车,通过执行机械制动以给前轮施加第一机械制动力,执行电机制动以给后轮施加第一电机制动力,其中,第一电机制动力与电动两轮车的车速成正相关;获取第一机械制动力,以及获取电动两轮车完成制动所需的总制动力,根据总制动力、第一机械制动力和第一电机制动力,确定第二电机制动力;根据第二电机制动力补偿后轮所需制动力,解决了相关技术中电动两轮车存在制动能量回收低、器件成本高的问题,实现了制动能量回收高、器件成本低、制动平稳的有益效果。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117698436B_ABST
    Figure CN117698436B_ABST
Patent Text Reader

Abstract

The application relates to an electric two-wheeled vehicle braking method, a brake system and an electric two-wheeled vehicle, wherein the electric two-wheeled vehicle braking method comprises the following steps: performing mechanical braking to apply a first mechanical braking force to a front wheel, performing motor braking to apply a first motor braking force to a rear wheel, wherein the first motor braking force is positively correlated with the vehicle speed of the electric two-wheeled vehicle; acquiring the first mechanical braking force, and acquiring a total braking force required for the electric two-wheeled vehicle to complete braking; determining a second motor braking force according to the total braking force, the first mechanical braking force and the first motor braking force; and compensating for the braking force required by the rear wheel according to the second motor braking force. Through the application, the problems of low braking energy recovery and high device cost of the electric two-wheeled vehicle in the prior art are solved, and the beneficial effects of high braking energy recovery, low device cost and stable braking are achieved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This application relates to the field of electric two-wheeled vehicles, and in particular to a braking method, braking system and electric two-wheeled vehicle. Background Technology

[0002] The traditional braking system for electric two-wheeled vehicles is as follows:

[0003] Option 1: Pure mechanical braking, which provides total braking force by applying mechanical braking to both the front and rear wheels. This option uses pure mechanical braking without regenerative braking, resulting in low vehicle range and high component costs for the mechanical braking system.

[0004] Option 2: Hybrid braking, which provides total braking force by executing front wheel mechanical braking, rear wheel mechanical braking, and electric motor braking. This option introduces electric motor braking based on Option 1. The motor is activated by receiving a signal from the brake lever. However, the energy recovery is low, and the high cost of the mechanical braking components still exists.

[0005] There are currently no effective solutions to the problems of low regenerative braking and high component costs in electric two-wheelers in related technologies. Summary of the Invention

[0006] This embodiment provides a braking method, braking system, and electric two-wheeler to address the problems of low braking energy recovery and high component costs in related technologies for electric two-wheelers.

[0007] Firstly, this embodiment provides a braking method for an electric two-wheeled vehicle, comprising:

[0008] Mechanical braking is applied to the front wheels to exert a first mechanical braking force, and electric motor braking is applied to the rear wheels to exert a first electric motor braking force, wherein the first electric motor braking force is positively correlated with the speed of the electric two-wheeler; the first mechanical braking force and the total braking force required for the electric two-wheeler to complete braking are obtained; a second electric motor braking force is determined based on the total braking force, the first mechanical braking force, and the first electric motor braking force; and the braking force required for the rear wheels is compensated based on the second electric motor braking force.

[0009] In some embodiments, obtaining the total braking force required for the electric two-wheeler to complete braking includes: obtaining a calibration coefficient; determining a second mechanical braking force to be applied to the rear wheel based on the calibration coefficient and the first mechanical braking force; and determining the total braking force based on the first mechanical braking force and the second mechanical braking force.

[0010] In some embodiments, obtaining the first mechanical braking force includes: obtaining the total mass, acceleration, and driving resistance of the electric two-wheeler, wherein the total mass includes the sum of the mass of the electric two-wheeler and the rider; and determining the first mechanical braking force based on the total mass, acceleration, driving resistance, and the first mechanical braking force of the electric two-wheeler.

[0011] In some embodiments, obtaining the driving resistance of the electric two-wheeler includes: obtaining the driving force applied when the electric two-wheeler is traveling at a constant speed without the mechanical braking and the motor braking being performed, and determining the driving resistance based on the driving force.

[0012] In some embodiments, obtaining the first mechanical braking force includes: obtaining a sensor signal output by a sensor connected to the mechanical braking assembly, and determining the first mechanical braking force based on the sensor signal, wherein the mechanical braking assembly includes a pedal or a handle.

[0013] In some embodiments, performing mechanical braking to apply a first mechanical braking force to the front wheels and performing electric motor braking to apply a first electric motor force to the rear wheels includes: in a first braking phase, performing coasting braking on the electric two-wheeler based on the mechanical braking and the electric motor braking; and in a second braking phase, performing the electric motor braking based on a third electric motor force, wherein the third electric motor force is obtained based on the first electric motor force and the second electric motor force.

[0014] In some embodiments, when performing the motor braking, the method further includes: detecting the charging state of the battery in the electric two-wheeler; and, based on the charging state, performing a motor braking energy recovery task or a motor energy consumption braking task.

[0015] In some embodiments, the electric two-wheeler is provided with a handlebar, and the method further includes: generating a brake signal when the handlebar is squeezed, and activating the motor brake according to the brake signal, before performing motor braking to apply a first motor power to the rear wheel.

[0016] Secondly, this embodiment provides a braking system applied to an electric two-wheeled vehicle, comprising: a mechanical braking module and a motor braking module. The mechanical braking module is connected to the motor braking module, the mechanical braking module is connected to the front wheel and is used only to brake the front wheel, and the motor braking module is connected to the rear wheel and is used only to brake the rear wheel. The mechanical braking module can perform mechanical braking to apply a first mechanical braking force to the front wheel, and the motor braking module can perform motor braking to apply a first electric motor braking force to the rear wheel. The first electric motor braking force is positively correlated with the speed of the electric two-wheeled vehicle. The motor braking module can also acquire the first mechanical braking force and the total braking force required for the electric two-wheeled vehicle to complete braking. Based on the total braking force, the first mechanical braking force, and the first electric motor braking force, a second electric motor braking force is determined, and the second electric motor braking force is used to compensate for the braking force required by the rear wheel.

[0017] Thirdly, this embodiment provides an electric two-wheeled vehicle, comprising: a main body including a front part and a rear part, wherein at least one riding area is provided between the front part and the rear part, and the riding area is provided with at least one driver's seat; wheels including a front wheel and a rear wheel; a suspension system connected to the lower end of the main body, the suspension system including a front suspension and a rear suspension, the front wheel being connected to the main body through the front suspension, and the rear wheel being connected to the main body through the rear suspension; a control system including a steering assembly disposed at the front part of the main body, the steering assembly including a handlebar; and the braking system described in the second aspect above.

[0018] Compared with related technologies, the electric two-wheeler braking method, braking system, and electric two-wheeler provided in this embodiment apply a first mechanical braking force to the front wheel by performing mechanical braking and a first electric motor braking force to the rear wheel by performing motor braking. The first electric motor braking force is positively correlated with the speed of the electric two-wheeler. The first mechanical braking force and the total braking force required for the electric two-wheeler to complete braking are obtained. Based on the total braking force, the first mechanical braking force, and the first electric motor braking force, a second electric motor braking force is determined. The braking force required for the rear wheel is compensated based on the second electric motor braking force. This solves the problems of low braking energy recovery and high component cost in related technologies for electric two-wheelers, and achieves the beneficial effects of high braking energy recovery, low component cost, and smooth braking.

[0019] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of an electric two-wheeled vehicle according to one embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the braking system in one embodiment of this application;

[0023] Figure 3 This is a flowchart of a braking method for an electric two-wheeled vehicle in one embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the braking curve under mixed braking conditions in related technologies;

[0025] Figure 5 This is a schematic diagram of the braking curve under mixed braking conditions in one embodiment of this application;

[0026] Figure 6 This is a flowchart illustrating the overall operation of the braking system in one embodiment of this application.

[0027] Reference numerals: 10, main body; 11, front; 12, rear; 13, driving / riding area; 20, wheel; 21, front wheel; 22, rear wheel; 30, suspension system; 31, front suspension; 32, rear suspension; 40, control system; 41, handlebars; 50, braking system; 51, mechanical braking module; 52, electric braking module; 521, motor controller; 522, drive motor; 60, battery system. Detailed Implementation

[0028] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0029] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning as understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these,” used in this application, do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” and “coupled,” used in this application, are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The term “multiple” used in this application refers to two or more. The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. Typically, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," and "third," etc., used in this application are merely for distinguishing similar objects and do not represent a specific ordering of the objects.

[0030] In one embodiment, an electric two-wheeled vehicle is provided; see [link / reference]. Figure 1 To clearly illustrate the technical solution of this application, the terms front, rear, left, right, top, and bottom are defined. The electric two-wheeled vehicle includes:

[0031] The main body 10 includes a front part 11 and a rear part 12, and at least one driving and riding area 13 is provided between the front part 11 and the rear part 12;

[0032] Wheel 20, including front wheel 21 and rear wheel 22;

[0033] The suspension system 30 includes a front suspension 31 and a rear suspension 32. The front wheel 21 is connected to the main body 10 through the front suspension 31, and the rear wheel 22 is connected to the main body 10 through the rear suspension 32.

[0034] The control system 40 includes a steering assembly located at the front of the main body 10, and the steering assembly includes a handle 41.

[0035] Braking system (see reference) Figure 2 It is at least partially supported on the main body 10 and connected to the front wheel 21 and the rear wheel 22 to provide braking force for the operation of the vehicle.

[0036] While the electric two-wheeler is in motion, the user can activate the braking system by squeezing the handlebars, and the vehicle will be braked by the braking system. Figure 2 This is a schematic diagram of the braking system in this embodiment, as shown below. Figure 2 As shown, the braking system 50 includes a mechanical braking module 51 and a motor braking module 52. The mechanical braking module 51 is connected to the motor braking module 52. The mechanical braking module 51 is connected to the front wheel 21 and is used only to brake the front wheel 21. The motor braking module 52 is connected to the rear wheel 22 and is used only to brake the rear wheel 22. The motor braking module 52 includes a motor controller 521 and a drive motor 522 connected to each other. Optionally, the electric two-wheeler also includes a battery system 60. The motor controller 521 is connected to the battery system 60 and is used to determine the battery's charging state. The motor controller 521 may include one or more processors and a memory for storing data. The processor may include, but is not limited to, a microprocessor (MCU) or a programmable logic device (FPGA). The memory can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the electric two-wheeler braking method proposed in this application. The processor executes various functional applications and data processing by running the computer program stored in the memory, thereby implementing the above-described method. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.

[0037] The braking system 50 of this embodiment is capable of performing the electric two-wheeled vehicle braking method proposed in this application. Figure 3 A flowchart of the braking method for electric two-wheeled vehicles is given, such as... Figure 3 As shown, the process includes the following steps:

[0038] In step S101, the mechanical braking module 51 performs mechanical braking to apply a first mechanical braking force to the front wheel 21, and the electric motor braking module 52 performs electric motor braking to apply a first electric motor force to the rear wheel 22, wherein the first electric motor force is positively correlated with the speed of the electric two-wheeled vehicle.

[0039] In step S102, the motor braking module 52 acquires the first mechanical braking force and the total braking force required for the electric two-wheeled vehicle to complete braking. Based on the total braking force, the first mechanical braking force, and the first motor braking force, the second motor braking force is determined.

[0040] In step S103, the motor braking module 52 compensates the rear wheel 22 for the braking force required by the second motor power compensation.

[0041] The braking scheme of the braking system in this embodiment will be described below with reference to the braking curve. Please refer to [link / reference]. Figure 4 , Figure 4This is a schematic diagram of braking curves under mixed braking conditions in related technologies. The required braking force on the front wheels is F1, and the required braking force on the rear wheels is F2. The motor braking force is positively correlated with vehicle speed, and as vehicle speed gradually decreases over time, the motor braking force also gradually decreases. Please refer to [link / reference]. Figure 5 , Figure 5 This is a schematic diagram of the braking curve under the mixed braking condition in this embodiment. The required front wheel braking force to complete braking is F1, and the required rear wheel braking force is F2. The sum of the first motor braking force and the second motor braking force equals the rear wheel braking force F2. The first motor braking force gradually decreases, and the second motor braking force gradually increases. Since the braking energy recovery and the motor braking force are positively correlated, through comparison... Figure 4 and Figure 5 It can be seen that, after braking is completed, the braking energy recovery ratio obtained in this embodiment will be higher than the braking energy recovery ratio of hybrid braking in related technologies.

[0042] In this embodiment, the front wheel 21 uses mechanical braking, and the rear wheel 22 uses electric motor braking, eliminating the rear wheel mechanical braking component and reducing component costs. Simultaneously, the electric motor braking module 52 calculates the front wheel mechanical braking force and the total braking force required by both wheels in pure mechanical braking mode. Based on the total braking force, the first mechanical braking force, and the first electric motor braking force, it calculates the second electric motor braking force and uses this second electric motor braking force to compensate for the braking force required by the rear wheel. This configuration increases the braking energy recovery ratio, extends the driving range, and ensures smooth braking of the electric two-wheeler even without the rear wheel mechanical braking component.

[0043] In one embodiment, the electric two-wheeler is configured for coasting braking. When the user releases the throttle, the electric two-wheeler will still coast and perform energy recovery through the motor braking module 52 even without squeezing the handlebar 41. When the user squeezes the handlebar 41 to send a brake signal, the electric two-wheeler enters a first braking stage and a second braking stage. In the first braking stage, the mechanical braking module 51 performs mechanical braking based on a first mechanical braking force, and the motor braking module 52 performs motor braking based on a first motor braking force. This configuration achieves coasting braking for the electric two-wheeler. In the second braking stage, the motor braking module 52 calculates a third motor braking force and performs motor braking based on the third motor braking force. The third motor braking force is obtained by superimposing the second motor braking force on the first motor braking force. This configuration improves the recovery of braking energy, increases range, and ensures smooth braking of the electric two-wheeler.

[0044] The following will introduce two schemes for the motor braking module 52 to obtain the first mechanical braking force.

[0045] Option 1: In one embodiment, the braking system 50 is equipped with a mechanical braking component and a sensor, such as a pedal or handle. The sensor is connected to the mechanical braking component to collect position data of the mechanical braking component and output a sensor signal. When the motor braking module 52 receives the sensor signal, the motor braking module 52 determines a first mechanical braking force based on the sensor signal. The sensor can be a stroke sensor (or depth sensor). For example, the voltage of the sensor signal is 0–5V.

[0046] Option 2: The above embodiment uses sensor signals as input signals to the motor braking module 52, allowing the motor braking module 52 to calculate the first mechanical braking force based on the position data in the sensor signals to execute motor braking. However, the device cost remains relatively high. To solve this problem, in one embodiment, the electric two-wheeler is equipped with handlebars. When the handlebars are squeezed, a braking signal is generated. When the motor braking module 52 receives the braking signal, it acquires the total mass, acceleration, and driving resistance of the electric two-wheeler. Based on the total mass, acceleration, driving resistance, and the first motor braking force, it calculates the first mechanical braking force. The total mass includes the sum of the mass of the electric two-wheeler and the rider. With this configuration, even without sensors, the motor braking module 52 can still acquire the magnitude of the first motor braking force, further reducing device costs. The driving resistance can be obtained as follows: when mechanical braking and motor braking are not performed, the motor braking module 52 acquires the driving force applied when the electric two-wheeler is traveling at a constant speed, and uses the magnitude of this driving force as the magnitude of the driving resistance. The mass of the electric two-wheeler is known at the factory and can be pre-stored in the motor braking module 52. The rider's mass can be calculated based on the electric two-wheeler's current speed, driving resistance, and mass.

[0047] For a sensor-equipped braking system, the required braking force for the rear wheels can be calculated based on data collected by the sensors at the moment the front wheels brake. However, the introduction of sensors increases device costs. To address this issue, in one embodiment, the motor braking module 52 acquires calibration coefficients and determines the second mechanical braking force to be applied to the rear wheels based on these calibration coefficients and the first mechanical braking force. The total braking force is then determined based on the first and second mechanical braking forces. The second mechanical braking force is calculated under the assumption of mechanical braking of the rear wheels in a purely mechanical braking mode. This configuration allows the motor braking module 52 to still acquire the magnitude of the second mechanical braking force even without the sensors. The calibration coefficients can be pre-stored in the motor braking module 52. These calibration coefficients can be obtained through experimental testing of purely mechanical braking electric vehicles. For example, for an electric two-wheeler actually employing a purely mechanical braking mode, multiple sets of front and rear wheel mechanical braking force data can be collected, and the ratio between the front and rear wheel mechanical braking forces can be obtained through data processing; this ratio is the calibration coefficient.

[0048] In one embodiment, when performing motor braking, the motor braking module 52 will also detect the charging status of the battery in the electric two-wheeler. If the battery status indicates that charging is allowed, the motor braking energy recovery task will be performed; if the battery status indicates that charging is not allowed, the motor energy consumption braking task will be performed.

[0049] In one embodiment, see Figure 6 The overall operation flowchart of the braking system is given, which includes the following steps:

[0050] In step S201, when the brake lever of the front wheel 21 is engaged, the mechanical braking module 51 generates a brake signal and applies a first mechanical braking force to the front wheel.

[0051] In step S202, the motor controller 521 receives the braking signal and detects the charging status of the battery;

[0052] In step S203, the motor controller 521 acquires the vehicle speed and motor torque in real time, and controls the drive motor 522 to apply the first electric motor power to the rear wheel 22.

[0053] In step S204, the motor controller 521 acquires the acceleration in real time and calculates the current first mechanical braking force;

[0054] In step S205, the motor controller 521 sets the target braking force curve based on the braking force curves of the front and rear wheels 22 during mechanical braking, and introduces the second motor power.

[0055] In step S206, the motor controller 521 performs regenerative braking or energy-saving braking based on the charging status.

[0056] In this embodiment, the total braking is achieved by combining the mechanical braking of the front wheels and the motor braking of the rear wheels. The mechanical brake lever of the front wheels adopts a closed signal. In the absence of a brake lever position signal, the motor controller 521 controls the braking experience and braking effect as if there is a brake lever position signal.

[0057] F 总 =F 前刹 +F 后刹

[0058] F 电1 =n×f×v t

[0059] Among them, F 总 F represents total braking force. 前刹 F represents the primary mechanical braking force. 后刹 F represents electric motor power. 电1 Represents the first electric motor's power, where n represents a coefficient, f represents the force constant, and v t This represents the vehicle speed collected in real time.

[0060] At time T0:

[0061] F 驱 =F 阻 +m×a t

[0062] Among them, F 驱 F represents the driving force of the motor. 阻 The resistance to movement is represented by 'm', the total mass of the electric two-wheeler is represented by 'a', and the resistance to movement is represented by 'm'. t This represents the real-time collected acceleration. At time T0, the vehicle can be considered to be moving at a constant speed, with zero acceleration. At the moment of braking, the front wheels send a braking signal to the motor controller 521. The motor controller 521 determines the battery charging status and outputs a signal using F... 电1 When the motor brakes, if the battery allows charging, energy recovery is performed; otherwise, the motor performs regenerative braking.

[0063] At time T1:

[0064] F 驱 =0

[0065] m×a t +F 阻 +F 前刹 +F 电1 =0

[0066] The motor controller 521 calculates the braking force F of the current mechanical brake based on the initial braking acceleration. 前刹 .

[0067] At time T2:

[0068] F 总 =F 前刹 +F 后刹

[0069] F 后刹 =k×F 前刹

[0070] F 电2 =F 后刹 -F 电1

[0071] Where k represents the calibration coefficient, F 电2 This represents the second electric motor power. At time T2, it simulates the total braking force required under purely mechanical braking conditions. Based on this total braking force, when performing electric motor braking, the second electric motor power is superimposed on the first electric motor power, so that the magnitude of the total electric motor power (third electric motor power) matches the braking force required by the rear wheels.

[0072] Through the above steps S201 to S206, the rear wheel mechanical braking is not required, reducing the cost of components; the front wheel brake signal is used as the input signal to start the motor braking, and the power of the second motor is controlled by the acceleration and mechanical braking curve, reducing the cost of sensor components; and coasting braking is used to reduce brake wear.

[0073] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0074] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0075] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A braking method for an electric two-wheeled vehicle, characterized in that, include: Mechanical braking is applied to the front wheels to apply a first mechanical braking force, and electric motor braking is applied to the rear wheels to apply a first electric motor force, wherein the first electric motor force is positively correlated with the speed of the electric two-wheeled vehicle; The first mechanical braking force and the total braking force required for the electric two-wheeled vehicle to complete braking are obtained. Based on the total braking force, the first mechanical braking force and the first electric motor braking force, the second electric motor braking force is determined. During braking, the vehicle speed gradually decreases over time, the first electric motor braking force gradually decreases over time, and the second electric motor braking force gradually increases over time. The braking force required by the rear wheels is compensated by the power of the second electric motor, so that the sum of the power of the first electric motor and the power of the second electric motor matches the braking force required by the rear wheels.

2. The braking method for an electric two-wheeled vehicle according to claim 1, characterized in that, The total braking force required for the electric two-wheeled vehicle to complete braking includes: Obtain calibration coefficients, and determine the second mechanical braking force to be applied to the rear wheels based on the calibration coefficients and the first mechanical braking force; The total braking force is determined based on the first mechanical braking force and the second mechanical braking force.

3. The braking method for an electric two-wheeled vehicle according to claim 1, characterized in that, Obtaining the first mechanical braking force includes: The total mass, acceleration, and driving resistance of the electric two-wheeled vehicle are obtained, wherein the total mass includes the sum of the mass of the electric two-wheeled vehicle and the mass of the rider; The first mechanical braking force is determined based on the total mass, acceleration, driving resistance, and the power of the first electric motor of the electric two-wheeled vehicle.

4. The braking method for an electric two-wheeled vehicle according to claim 3, characterized in that, The driving resistance of the electric two-wheeled vehicle is obtained by: Without performing the mechanical braking and the motor braking, the driving force applied when the electric two-wheeled vehicle is traveling at a constant speed is obtained, and the driving resistance is determined based on the driving force.

5. The braking method for an electric two-wheeled vehicle according to claim 1, characterized in that, Obtaining the first mechanical braking force includes: The sensor signal output by the sensor connected to the mechanical braking assembly is acquired, and the first mechanical braking force is determined based on the sensor signal, wherein the mechanical braking assembly includes a pedal or a handle.

6. The braking method for an electric two-wheeled vehicle according to claim 1, characterized in that, Executing mechanical braking to apply a first mechanical braking force to the front wheels and executing electric braking to apply a first electric motor force to the rear wheels, including: In the first braking phase, the electric two-wheeled vehicle is braked according to the mechanical braking and the motor braking. In the second braking phase, the motor braking is performed according to the third motor power, wherein the third motor power is obtained from the first motor power and the second motor power.

7. The braking method for an electric two-wheeled vehicle according to claim 1, characterized in that, When performing the motor braking, the method further includes: Detect the charging status of the battery in the electric two-wheeler; Depending on the charging state, either a motor braking energy recovery task or a motor energy consumption braking task is performed.

8. The braking method for an electric two-wheeled vehicle according to claim 1, characterized in that, The electric two-wheeled vehicle is equipped with handlebars, and the method further includes, before applying motor braking to apply first motor power to the rear wheel: When the handle is squeezed, a brake signal is generated; The motor brakes are activated based on the brake signal.

9. A braking system for use in an electric two-wheeled vehicle, characterized in that, include: The system includes a mechanical braking module and a motor braking module, wherein the mechanical braking module is connected to the motor braking module, the mechanical braking module is connected to the front wheel and is used only for braking the front wheel, and the motor braking module is connected to the rear wheel and is used only for braking the rear wheel; wherein... The mechanical braking module is capable of performing mechanical braking to apply a first mechanical braking force to the front wheel, and the electric motor braking module is capable of performing electric motor braking to apply a first electric motor braking force to the rear wheel, wherein the first electric motor braking force is positively correlated with the speed of the electric two-wheeler; the electric motor braking module is also capable of acquiring the first mechanical braking force and the total braking force required for the electric two-wheeler to complete braking, and determining a second electric motor braking force based on the total braking force, the first mechanical braking force, and the first electric motor braking force; during braking, the vehicle speed gradually decreases over time, the first electric motor braking force gradually decreases over time, and the second electric motor braking force gradually increases over time; the braking force required by the rear wheel is compensated based on the second electric motor braking force, so that the sum of the first electric motor braking force and the second electric motor braking force matches the braking force required by the rear wheel.

10. An electric two-wheeled vehicle, characterized in that, include: The main body includes a front part and a rear part, and at least one driving and riding area is provided between the front part and the rear part, and at least one driver's seat cushion is provided in the driving and riding area; Wheels, including front wheels and rear wheels; A suspension system is connected to the lower end of the main body. The suspension system includes a front suspension and a rear suspension. The front wheel is connected to the main body through the front suspension, and the rear wheel is connected to the main body through the rear suspension. A control system, including a steering assembly disposed at the front of the main body, the steering assembly including a handle; The braking system as claimed in claim 9.

Citation Information

Patent Citations

  • New energy automobile motor braking system

    CN113844423A

  • Brake System for Saddle-Type Vehicle

    US20200180577A1