Control method for auxiliary starting of electric auxiliary carrier

Abstract

The invention relates to an auxiliary starting control method of an electric auxiliary carrier. The method comprises the following steps of: A) detecting whether a brake signal of the electric auxiliary carrier is triggered or not; b) comparing whether a running speed of the electric auxiliary carrier is smaller than or equal to a speed threshold value; c) detecting whether an electric switch signal of the electric auxiliary carrier is on or not; d) if the brake signal is triggered, the running speed is smaller than or equal to the speed-per-hour threshold value, and the switch signal is turned on, a holding current is output to an electric motor of the electric auxiliary carrier, so that the electric motor generates assisting power; and E) continuously supplying the holding current for a holding time; therefore, when the bicycle is ridden again after the bicycle stops on the uphill road section, the electric auxiliary carrier is prevented from sliding down, and an uphill starting assisting mechanism is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to an electrically assisted vehicle, and in particular to a control method for assisting the starting of an electrically assisted vehicle. When the vehicle is stopped on an uphill road, the electric motor maintains the output according to the holding current without being immediately powered off. When the rider releases the brake to start, the electrically assisted vehicle remains in place, which can improve the safety of the electrically assisted vehicle when it is operated. BACKGROUND

[0002] Traditional scooters require the rider to continuously step on with one foot to achieve the effect of sliding forward. Electric scooters use an electric motor as a power source to drive the electric scooter forward. When the rider is not strong enough, they only need to turn the electric handlebar to provide power to the electric motor to drive the wheels of the electric scooter forward.

[0003] When the electric scooter, a type of assisted power vehicle, stops on a slope, the rider needs to continuously press the brake or use one or both feet to support the vehicle on the slope. At this time, the electric scooter's electric handlebar is turned off, and the electric motor does not generate torque. However, when restarting, the rider usually needs to release the brake to prepare to turn the electric handlebar. At this time, the electric motor re-establishes the torque, and the electric scooter is affected by the rider's weight, causing the electric scooter to slide down first and then move forward. This not only affects the rider's comfort experience when restarting, but also can be dangerous.

[0004] Chinese Patent No. CN 216805714 U provides an electric tricycle controller with a hill start assist function. During uphill starting, the rider needs to continuously press the auxiliary button on the speed adjustment handlebar, slowly turn the speed adjustment handlebar, and simultaneously slowly release the brake. The vehicle can only release the auxiliary button after normal driving. This requires the rider to operate multiple devices simultaneously, which can distract the rider and cause danger. Chinese Patent No. CN 107187336 A detects acceleration data and inclination angle data of the electric vehicle through a gyroscope detection module. When the inclination angle is positive, it is determined that the electric vehicle is on an uphill, and the corresponding traction force is provided according to the auxiliary function to prevent the electric vehicle from sliding down.

[0005] However, electric scooters are relatively low-priced products in the vehicle market. Installing a gyroscope element in an electric scooter is not economically beneficial to control manufacturing costs. Therefore, how to provide a mechanism for assisting the starting of an electric scooter on a slope is the direction considered by the inventors. SUMMARY

[0006] The inventor, in view of the aforementioned defects of the existing electrically assisted vehicles, has improved the same based on his rich professional knowledge and years of practical experience, and thus invented the present application.

[0007] The main object of the present application is to provide a control method for assisting the start of an electrically assisted vehicle, which determines whether the electrically assisted vehicle needs to start the assisting start function by using data of three running conditions, so that the rider can continuously have power output to maintain the position of the electrically assisted vehicle when starting uphill, and the rider does not need to worry about the problem of the electrically assisted vehicle sliding down.

[0008] In order to achieve the above-mentioned implementation purposes, the control method for assisting the start of the electrically assisted vehicle comprises the following steps: A) detecting whether a brake signal of the electrically assisted vehicle is triggered; B) comparing whether a running speed of the electrically assisted vehicle is less than or equal to a time speed threshold; C) detecting whether an electric door signal of the electrically assisted vehicle is turned on; D) if the brake signal is triggered, the running speed is less than or equal to the time speed threshold, and the electric door signal is turned on, then outputting a holding current to an electric motor of the electrically assisted vehicle, so that the electric motor generates a boost; and E) continuously supplying the holding current within a holding time.

[0009] In an embodiment of the present application, in step D), if the brake signal is not triggered, the running speed is greater than the time speed threshold, and the electric door signal is turned on, then the electrically assisted vehicle does not output the holding current to the electric motor, i.e. stops generating the boost, and returns to step A).

[0010] In an embodiment of the present application, in step E), when the holding time is up, the output of the holding current is stopped.

[0011] In an embodiment of the present application, the time speed threshold is 1-3 km / hr.

[0012] In an embodiment of the present application, the holding current is 1-5 amperes.

[0013] In an embodiment of the present application, the holding time is 3-10 seconds.

[0014] In an embodiment of the present application, the electrically assisted vehicle comprises a controller electrically connected to the electric motor, a brake detection module electrically connected to the controller, a speed detection module electrically connected to the controller, and an electric door detection module electrically connected to the controller.

[0015] In an embodiment of the present application, the brake signal is transmitted from the brake detection module to the controller, the running speed is transmitted from the speed detection module to the controller, the electric door signal is transmitted from the electric door detection module to the controller, and the time speed threshold, the set value of the holding current, and the set value of the holding time are set in the controller. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Flow chart of the control method of the embodiment of the present application;

[0017] Figure 2 Device architecture diagram of the auxiliary starting mechanism of the embodiment of the present application;

[0018] Figure 3 Oscilloscope extraction diagram of the current change of the embodiment of the present application (one);

[0019] Figure 4 Oscilloscope extraction diagram of the current change of the embodiment of the present application (two); and

[0020] Figure 5 Oscilloscope extraction diagram of the current change of the embodiment of the present application (three).

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1: electrically assisted vehicle;

[0023] 2: electric motor;

[0024] 3: controller;

[0025] 4: brake detection module;

[0026] 5: speed detection module;

[0027] 6: accelerator pedal detection module;

[0028] S1-S5: steps. DETAILED DESCRIPTION

[0029] Please refer to Figure 1 and Figure 2The electrically assisted vehicle 1 of the present application controls the device for assisting the starting mainly comprises an electric motor 2, a controller 3, a brake detection module 4, a speed detection module 5 and a handlebar detection module 6. The electrically assisted vehicle 1 can be an electric scooter for example. The electric motor 2 is electrically connected to the controller 3. The brake detection module 4 is arranged on the brake lever of the electrically assisted vehicle 1 and is electrically connected to the controller 3. When the brake lever is pulled, the brake detection module 4 generates a brake signal and transmits it to the controller 3. The speed detection module 5 can be arranged on the wheel. The speed of the electrically assisted vehicle 1 is calculated by detecting the rotation speed of the wheel. The running speed is transmitted to the controller 3 or the rotation speed data of the wheel is transmitted to the controller 3. The controller 3 calculates the running speed. The handlebar detection module 6 is connected to the signal transmission line of the handlebar. When the handlebar is turned, the handlebar detection module 6 generates a handlebar signal and transmits it to the controller 3. The controller 3 provides a corresponding current signal to the electric motor 2 to drive the electric motor 2 to output torque and drive the electrically assisted vehicle 1 to move forward.

[0030] The control method of the electrically assisted vehicle 1 of the present application for assisting the starting comprises the following steps.

[0031] Step S2: The controller 3 compares the running speed of the electrically assisted vehicle 1 with the pre-set speed threshold. The speed detection module 5 transmits the running speed of the electrically assisted vehicle 1 to the controller 3. The controller 3 compares the running speed with the speed threshold. When the running speed is less than or equal to the speed threshold, it means that the electrically assisted vehicle 1 has approached the stop state.

[0032] Step S3: The controller 3 detects whether the handlebar signal of the electrically assisted vehicle 1 is on or off. If the handlebar detection module 6 transmits the handlebar signal, it means that the handlebar signal is on, but the rider does not turn the handlebar. Therefore, the overall riding state has changed from riding to stopping. At this time, the brake signal and the handlebar signal are detected to maintain the current output to the motor to generate assistance, as in step S4.

[0033] Step S4: At this time, the controller 3 of the electrically assisted vehicle 1 gives a signal to maintain the current and outputs the current to the electric motor 2 to generate assistance.

[0034] Step S5: The holding current is continuously output for a holding time. Both the holding current and the holding time are set in the controller 3 before the factory shipment. When the electric motor 2 outputs the assist force according to the holding current for the holding time, the controller 3 stops providing the signal of the holding current, and the electric motor 2 stops outputting the assist force.

[0035] The electric motor 2 outputs the assist force according to the holding current only when three driving conditions are sequentially established. The three driving conditions are that the brake signal is triggered, the driving speed is less than or equal to the speed threshold, and the electric switch signal is turned on. However, when the three driving conditions are not established, the electric motor 2 does not output the assist force, and the electrically assisted vehicle 1 is considered to be in a normal riding state. The controller 3 returns to the step of detecting whether the brake signal is triggered.

[0036] The electric motor 2 outputs the assist force, which means that the electric motor 2 continuously provides torque to balance the weight of the rider when the electrically assisted vehicle 1 is in a stationary state. The current value is gradually increased by the holding current to achieve the function of assisting the start of the electrically assisted vehicle 1, thereby improving the experience of the rider.

[0037] In addition, the set value of the holding current is pre-set in the controller 3 before the factory shipment of the electrically assisted vehicle 1. The set value of the holding current is mainly determined according to the weight of the rider and the slope. A rider weighing 50 kg only needs to output a holding current of 1 ampere to generate a corresponding assist force of the electric motor 2, so that the electrically assisted vehicle 1 does not slide backward on a slope of 7%. A rider weighing 80 kg needs to output a holding current of 4 amperes to generate an assist force of the electric motor 2, so that the electrically assisted vehicle 1 does not slide backward on a slope of 7%. Therefore, the holding current of the present application can be set between 1 ampere and 5 amperes to adapt to other weight conditions.

[0038] Please continue to refer to Figures 3-5 Three embodiments. Figure 3 The X-axis of the embodiment is 1 ampere, and the Y-axis is 2 seconds. Figure 4 The X-axis of the embodiment is 2 amperes, and the Y-axis is 2 seconds. Figure 5 The X-axis of the embodiment is 5 amperes, and the Y-axis is 2 seconds. In the embodiment, the set value of the holding current of the controller 3 is set to 1 ampere, the speed threshold is set to 1 km / hr, and the set value of the holding time is set to 6 seconds.

[0039] Figure 3 The output current of the original electrically assisted vehicle 1 is about 2-4 amperes. Figure 4 The output current of the original electrically assisted vehicle 1 is about 6-10 amperes. Figure 5 The output current of the original electrically assisted vehicle 1 is about 7.5-20 amperes.

[0040] When the brake lever is pulled, the brake detection module 4 generates a brake signal, the controller 3 detects the brake signal, at this time the electric auxiliary vehicle 1 speed drops, the speed detection module 5 transmits the running speed to the controller 3, the controller 3 judges that the running speed is less than or equal to 1 km / h, and the rider will simultaneously release the electric handlebar when braking, but the electric handlebar of the embodiment does not close, so the controller 3 determines that the electric handlebar signal is open, and the electric auxiliary vehicle 1 outputs 1 ampere of holding current to the electric motor 2 according to the current signal output by the controller 3, and the electric motor 2 generates corresponding assistance according to the holding current, and maintains for 6 seconds.

[0041] In this way, the rider releases the brake and prepares to turn the electric handlebar at the moment, and the electric auxiliary vehicle 1 maintains the assistance output by the electric motor 2 at the original position, avoiding the danger caused by the electric auxiliary vehicle 1 sliding down.

[0042] From the above implementation description, compared with the prior art, the present application has the following advantages:

[0043] 1. The control method of the electric auxiliary vehicle auxiliary starting, by detecting the brake signal, the running speed and the electric handlebar signal three running conditions to judge whether the auxiliary starting mechanism needs to be started, and provides an auxiliary riding mechanism on the uphill, and improves the safety of riding.

[0044] 2. The control method of the electric auxiliary vehicle auxiliary starting, when the brake signal, the running speed and the electric handlebar signal three running conditions are all established, the electric motor of the electric auxiliary vehicle will output assistance, and maintain the holding time, so that the rider releases the brake and starts at the moment, avoiding the danger caused by the electric auxiliary vehicle sliding down.

Claims

1. A control method for assisting the starting of an electrically assisted vehicle, comprising the steps of: A) detecting whether a brake signal of an electrically assisted vehicle is triggered; B) comparing whether a running speed of the electrically assisted vehicle is less than or equal to a threshold speed; C) detecting whether an accelerator signal of the electrically assisted vehicle is on; D) if the brake signal is triggered, the running speed is less than or equal to the threshold speed, and the accelerator signal is on, outputting a holding current to an electric motor of the electrically assisted vehicle, so that the electric motor generates an assist force; and E) continuously supplying the holding current for a holding time.

2. The control method of the assist start of the electrically assisted vehicle according to claim 1, characterized by, In step D), if the brake signal is not triggered, the running speed is greater than the threshold speed, and the accelerator signal is on, the electrically assisted vehicle does not output the holding current to the electric motor, i.e. stops generating the assist force, and returns to step A).

3. The control method of the assisted start of the electrically assisted vehicle according to claim 1, characterized in that, In step E), when the holding time is reached, the output of the holding current is stopped.

4. The control method of the assisted start of the electrically assisted vehicle according to claim 1, characterized in that, The threshold speed is 1-3 km / hr.

5. The control method of the assisted start of the electrically assisted vehicle according to claim 1, characterized in that, The holding current is 1-5 amperes.

6. The control method of the assisted start of the electrically assisted vehicle according to claim 1, characterized in that, The holding time is 3-10 seconds.

7. The control method of the assisted start of the electrically assisted vehicle according to claim 1, characterized in that, The electrically assisted vehicle comprises a controller electrically connected to the electric motor, a brake detection module electrically connected to the controller, a speed detection module electrically connected to the controller, and an accelerator detection module electrically connected to the controller.

8. The control method of the assisted start of the electrically assisted vehicle according to claim 7, characterized in that, The brake signal is transmitted from the brake detection module to the controller, the running speed is transmitted from the speed detection module to the controller, the accelerator signal is transmitted from the accelerator detection module to the controller, and the threshold speed, the set value of the holding current, and the set value of the holding time are set in the controller.

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