Intelligent speed control electric vehicle

Abstract

The present application relates to two-wheel electric vehicle technical field, solve the accident prone in the process of uphill and downhill and turning riding, and the damping of front fork shock absorber cannot be adjusted with the change of road slope, the solution: the main control module is connected with the controller to control the vehicle operation, the IMU inertia detection module detects the vehicle body posture and speed, the electromagnetic damper is used as the damping adjustable front fork shock absorber, when the electric vehicle drives uphill and downhill, the main control module automatically adjusts the damping of electromagnetic damper accordingly; in the process of uphill, when the speed control signal of speed control handle reaches the peak value, the main control module controls the driving motor to reduce the speed to the speed interval of maximum torque output; in the process of turning and / or downhill, the main control module limits the driving motor to run at half speed or below half speed. The damping of the front fork shock absorber of the present application is adjustable, and intelligent speed control can be realized in the process of uphill and downhill and turning, which avoids accidents caused by misoperation of the speed control handle, and is safer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric vehicles, in particular two-wheeled electric vehicles, and more particularly to an intelligent speed control electric vehicle. BACKGROUND

[0002] Electric vehicles, in particular two-wheeled electric vehicles (electric motorcycles, electric bicycles, electric power-assisted bicycles), have become the main means of transportation for short-distance travel for the general public, with a particularly large user base. As a result, traffic accidents involving electric vehicles caused by improper driving and design problems with the vehicle control system have occurred frequently, attracting widespread attention from society.

[0003] Most people believe that during uphill travel on an electric vehicle, the maximum torque output of the electric motor will be achieved if the speed control handlebar is twisted to the limit position, causing the electric vehicle drive motor to operate at maximum speed, thereby improving the vehicle's climbing efficiency. However, this is not the case. The output torque of the electric vehicle drive motor is not directly proportional to the motor speed, and the maximum torque output speed range is usually around 8-12 km / h at low speed. As the speed increases, the motor output torque will gradually decrease. Therefore, twisting the speed control handlebar to the bottom when riding an electric vehicle uphill will not only not improve the climbing efficiency, but will also cause the electric vehicle to lose power due to the decrease in motor output torque, and even cause the vehicle to roll back, slide, and other abnormalities, which may lead to accidents and pose a significant safety risk. Moreover, during uphill travel, the driver will unconsciously twist the speed control handlebar to the bottom, causing the drive motor to operate at maximum speed for a long time, which can easily cause the motor to overload and even burn out the controller of the electric vehicle.

[0004] At the same time, during downhill travel on existing electric vehicles, the speed of the drive motor is still directly controlled by the speed control handlebar. When downhill, the riding posture is too forward and the speed is too fast, and the driver is prone to excessively twisting the speed control handlebar, which can cause a runaway accident. Moreover, during turning travel on an electric vehicle, especially during sharp turns, the driver's grip posture and handlebar angle are limited, and the driver is also prone to excessively twisting the speed control handlebar, which can cause a runaway accident and pose a significant safety risk.

[0005] In addition, the front fork shock absorber of existing two-wheeled electric vehicles cannot adaptively adjust the damping according to the road slope during uphill or downhill travel, resulting in unstable control of the vehicle's posture during uphill or downhill travel, and an increased risk of accidents such as flipping or falling. SUMMARY

[0006] In summary, the purpose of the present application is to solve the technical problems that the existing two-wheel electric vehicle is prone to accidents caused by the driver's incorrect operation of the speed regulating handlebar during uphill and downhill riding and turning, and the front fork shock absorber cannot adaptively adjust the damping according to the road slope, resulting in unstable body posture control during uphill and downhill riding, and easy to overturn and fall, and to provide an intelligent speed control electric vehicle with higher safety and adaptability to different road slopes.

[0007] To solve the technical problems of the present application, the technical solution adopted is an intelligent speed control electric vehicle, which comprises a controller, a drive motor and a speed regulating handlebar for regulating the speed of the drive motor, characterized in that it further comprises:

[0008] The main control module is connected to the controller in bidirectional data communication to control the operation of the electric vehicle.

[0009] The IMU inertial detection module is electrically connected to the signal receiving end of the main control module for detecting changes in vehicle body posture and driving speed.

[0010] The electromagnetic damper is electrically connected to the signal output end of the main control module and is arranged on the front fork of the electric vehicle as a damping adjustable front fork shock absorber.

[0011] When the IMU inertial detection module detects that the electric vehicle is driving uphill, the main control module automatically increases the damping of the electromagnetic damper.

[0012] During uphill, when the speed regulating control signal of the speed regulating handlebar reaches the peak value, the main control module automatically controls the drive motor to run at the maximum torque output speed range through the controller.

[0013] When the electric vehicle is driving downhill, the main control module automatically reduces the damping of the electromagnetic damper.

[0014] During turning and / or downhill, the main control module automatically limits the driving signal output to the drive motor by the controller according to the received speed regulating control signal, so that the drive motor runs at half speed or below.

[0015] Further, the intelligent speed control system further comprises:

[0016] The display instrument is arranged in the middle of the handlebar of the electric vehicle and is electrically connected to the controller for displaying the running state parameters and power of the electric vehicle.

[0017] Further, the main control module and the IMU inertial detection module are arranged in the display instrument.

[0018] Further, the IMU inertial detection module comprises:

[0019] An acceleration sensor is configured to detect a change in vehicle speed.

[0020] A gyroscope is configured to detect a change in vehicle angle.

[0021] Compared with the prior art, the electric vehicle has the following advantages:

[0022] 1. The main control module and the controller perform bidirectional data interaction and control vehicle operation, and the IMU inertial detection module is electrically connected with the signal receiving end of the main control module, so that the main control module can analyze the change in the posture of the electric vehicle and the change in the driving speed in real time according to the data information reported by the IMU inertial detection module, so as to automatically control the electromagnetic damper to increase the damping and adjust the hard front fork shock absorber when the vehicle is climbing, to prevent the front wheel of the electric vehicle from rolling too much and causing the electric vehicle to overturn or fall during the climbing process, and automatically control the electromagnetic damper to reduce the damping and adjust the soft front fork shock absorber when the vehicle is descending, to prevent the front wheel of the electric vehicle from being unable to effectively buffer and absorb shock, causing the electric vehicle to overturn or fall during the descending process, thereby significantly improving the safety of the electric vehicle during climbing.

[0023] 2. When the speed regulating handle is screwed by the driver to the limit position and the output speed regulating control signal reaches the peak value during the climbing process, the main control module automatically intervenes in the speed regulation control of the driving motor, limits the size of the driving signal output by the power conversion unit in the driving module of the controller to the driving motor, and the degree of limitation of the motor speed is based on the speed interval of the maximum output torque of the motor, to prevent the vehicle from being unable to climb, descending or sliding due to the reduction of the output torque of the motor when the driver screws the speed regulating handle to the limit position during climbing, effectively avoiding accidents caused by the misoperation of the driver during climbing, and improving the safety. Moreover, the speed control driving intervention of the main control module is automatic, and the above trigger conditions (i.e., the vehicle is in the climbing process and the speed regulating control signal of the speed regulating handle reaches the peak value) are met, the degree of automation is high, the electric vehicle can automatically climb at the maximum output torque, the climbing efficiency is improved, the motor is prevented from being overloaded, and the controller is prevented from being burned out.

[0024] 3. During the turning and / or descending process of the vehicle, the main control module automatically intervenes in the speed regulation control of the driving motor, limits the size of the driving signal output by the power conversion unit in the driving module of the controller to the driving motor, and the degree of limitation of the motor speed is based on half or less of the normal speed regulating size of the speed regulating handle, so that the driving motor of the electric vehicle can run at half or less of the normal speed during the turning and descending process of the vehicle, to avoid the flying accident caused by the driver's incorrect over-screwing of the speed regulating handle during the turning and descending process, and improve the safety. Moreover, the speed control driving intervention of the main control module is automatic, and the above trigger conditions (i.e., the vehicle is in the turning or descending process and the speed regulating handle has the speed regulating control signal output) are met, and the degree of automation is high. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 It is the whole structure schematic diagram of electric vehicle of the present application;

[0026] Fig. 2 It is the circuit principle block diagram of electric vehicle of the present application.

[0027] In the figure: 1. frame, 11. rear wheel, 12. handlebar, 2. controller, 3. drive motor, 4. speed regulating handle, 5. display instrument, 6. main control module, 7. IMU inertial detection module, 71. acceleration sensor, 72. gyroscope, 8. electromagnetic damper. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to better understand the technical solutions of the present application, the following will further illustrate the present application through specific examples, and the specific embodiments adopted in the following examples are only a part of the preferred embodiments of the technical solutions of the present application, and are not a limitation of the present application.

[0029] Reference Figs. 1-2 As shown in the figure, the intelligent speed control electric vehicle of the present application comprises a frame 1, a controller 2 arranged in the frame 1, a drive motor 3, a speed regulating handle 4 and a display instrument 5 electrically connected with the controller 2 respectively. The drive motor 3 is preferably a hub motor arranged on the rear wheel 11 of the electric vehicle, and its drive signal input end is electrically connected with the drive signal output end of the controller 2, for driving the vehicle to travel under the drive of the controller 2. The speed regulating handle 4 is arranged on the handlebar 12 of the frame 1, and is preferably a Hall speed regulating handle, and the signal output end of its Hall element is connected with the speed control signal input end of the controller 2, for sending a speed control signal to the controller 2 to manually control the travel speed of the electric vehicle. The display instrument 5 is arranged in the middle of the handlebar 12 of the electric vehicle, and is electrically connected with the signal output end of the controller 2, for displaying the running state parameters (such as travel speed, travel mileage) and power information of the vehicle.

[0030] Specifically, the display instrument 5 further comprises a main control module 6 connected with the controller 2 for bidirectional data communication to control the running of the electric vehicle. The connection mode of the main control module 6 and the controller 2 can be wired connection or wireless connection, and after the two are connected in communication, bidirectional interaction of data information can be realized, which is convenient for the main control module 6 to control the running of the vehicle.

[0031] Specifically, the display instrument 5 further comprises an IMU inertial detection module 7 electrically connected with the signal receiving end of the main control module 6. The IMU inertial detection module 7 specifically comprises an acceleration sensor 71 for detecting the speed change of the vehicle and a gyroscope 72 for detecting the angle change of the vehicle.

[0032] Specifically, the front fork shock absorber of the electric vehicle is an electromagnetic damper 8, which is electrically connected with the signal output end of the main control module 6 through a control circuit, and can realize automatic regulation of the damping size under the control of the main control module 6.

[0033] In actual riding process, if the IMU inertia detection module 7 detects that the electric vehicle is driving uphill through the acceleration sensor 71 and the gyroscope 72, the main control module 6 automatically controls the damping of the electromagnetic damper 8 to linearly increase, and the degree of damping increase is preferably proportional to the road slope, that is, the greater the slope, the greater the damping of the electromagnetic damper 8, and the harder the front fork shock absorber, and when the slope exceeds 30°, the main control module 6 adjusts the damping of the electromagnetic damper 8 to the maximum and locks it.

[0034] If the IMU inertia detection module 7 detects that the electric vehicle is driving downhill through the acceleration sensor 71 and the gyroscope 72, the main control module 6 automatically controls the damping of the electromagnetic damper 8 to linearly decrease, and the degree of damping decrease is preferably inversely proportional to the road slope, that is, the greater the slope, the smaller the damping of the electromagnetic damper 8, and the softer the front fork shock absorber, and when the slope exceeds 30°, the main control module 6 adjusts the damping of the electromagnetic damper 8 to the minimum.

[0035] In the process of driving on flat road, the main control module 6 restores the preset medium damping size of the electromagnetic damper 8, so that the front fork shock absorber of the electric vehicle is neither too hard nor too soft.

[0036] The front fork shock absorber of the electric vehicle can adaptively adjust the damping size of the electromagnetic damper 8 under the control of the main control module 6 according to the change of the road slope, so that the vehicle can better adapt to the road slope during uphill and downhill process, and the driver can better control the vehicle body posture, thereby improving the stability of the vehicle driving on slope, avoiding the occurrence of overturning and falling accidents, and being safer.

[0037] If the IMU inertial detection module 7 detects that the electric vehicle is climbing uphill through the acceleration sensor 71 and the gyroscope 72, and the speed regulating handle 4 sends a speed regulating control signal to the controller 2 to reach the peak value, the main control module 6 can automatically intervene in the speed regulation of the driving motor 3 without human intervention, limit the size of the driving signal output by the power conversion unit in the driving module of the controller 2 to the driving motor 3, and the degree of motor speed limitation is based on the speed interval of the maximum output torque of the motor, which prevents the vehicle from climbing uphill when the driver rotates the speed regulating handle 4 to the limit position, and the vehicle climbing uphill, downhill, and other abnormalities caused by the reduction of the motor output torque, effectively avoids accidents caused by the driver's misoperation when climbing uphill, and has higher safety. Moreover, the speed control driving intervention of the main control module 6 is automatic, as long as the above trigger conditions are met (i.e. the vehicle is in the climbing process, and the speed regulating control signal of the speed regulating handle 4 reaches the peak value), which has high automation degree, and ensures that the electric vehicle can automatically climb uphill with the maximum output torque, improves the climbing efficiency, prevents the motor from being overloaded, and avoids the controller 2 from being burned out due to overload.

[0038] If the IMU inertial detection module 7 detects that the electric vehicle is turning and / or downhill through the acceleration sensor 71 and the gyroscope 72, the main control module 6 can also automatically intervene in the speed regulation of the driving motor 3 without human intervention, limit the size of the driving signal output by the power conversion unit in the driving module of the controller 2 to the driving motor 3, and the degree of motor speed limitation is based on half or less of the normal speed regulating size of the speed regulating handle 4, so that the driving motor 3 of the electric vehicle can run at half or less of the normal speed during the turning and downhill process of the vehicle, avoiding the flying accident caused by the driver's error in excessively rotating the speed regulating handle 4 during the turning and downhill process, and having higher safety. Moreover, the speed control driving intervention of the main control module 6 is automatic, as long as the above trigger conditions are met (i.e. the vehicle is in the turning or downhill process, and the speed regulating handle 4 has a speed regulating control signal output), which has high automation degree.

[0039] In summary, the electric vehicle of the application has a highly intelligent automatic speed control system. During the uphill and turning process of the vehicle, the main control module can automatically intervene in the speed regulation of the driving motor without human intervention, which has high intelligence and automation degree, avoids accidents caused by the driver's error in rotating the speed regulating handle during the uphill and turning process, and has higher safety. Moreover, the main control module can also automatically adjust the damping size of the front fork shock absorber according to the road slope change, so that the electric vehicle of the application can better adapt to uphill driving, the stability of the vehicle body posture is higher, and accidents such as vehicle overturning and falling during uphill driving are avoided, which has higher safety.

[0040] The above examples are only for clearly expressing the technical solutions of the present application, and are not a limitation on the embodiments of the present application. Those skilled in the art can make various corresponding changes and modifications to the present application without departing from the spirit and essence of the present application, and these corresponding changes and modifications shall all belong to the protection scope of the present application.

Claims

1. A smart speed-controlled electric vehicle comprising a controller, a drive motor and a speed-regulating handlebar for regulating the speed of the drive motor, characterized in that, Also include: The host module, with the controller for bidirectional data communication connection to control the operation of electric vehicles; IMU inertial detection module, with the signal receiving end of the host module electrically connected, for detecting the body posture changes and changes in speed; Electromagnetic damper, with the signal output end of the host module electrically connected, corresponding to the front fork of the electric vehicle, as a front fork shock absorber adjustable damping; The IMU inertial detection module detects the uphill travel of electric vehicles, and the host module automatically increases the damping of the electromagnetic damper; During the uphill process, when the speed control signal of the speed control handle reaches the peak value, the host module automatically controls the drive motor to run at the maximum torque output speed interval through the controller; When the electric vehicle is running downhill, the host module automatically reduces the damping of the electromagnetic damper; During the turning and / or downhill process, the host module automatically limits the drive signal output to the drive motor by the controller according to the received speed control signal, so that the drive motor runs at half speed or below; The intelligent speed control system further comprises: Display instrument, set in the middle of the handle of the electric vehicle, electrically connected with the controller, for displaying the running state parameters and power of the electric vehicle; The IMU inertial detection module comprises: Acceleration sensor, for detecting the change of vehicle speed; Gyroscope, for detecting the change of vehicle angle.

2. The intelligent speed controlled electric vehicle as claimed in claim 1, wherein, The host module and the IMU inertial detection module are arranged in the display instrument.

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