Automatic speed changing method and device for hybrid power bicycle

Abstract

The invention is applicable to the technical field of automatic speed change and provides an automatic speed changing method and device for a hybrid power bicycle. The method comprises the following steps that a, a sensor set acquires a current riding state signal in real time and transmits the signal to a microprogrammed control unit (MCU); b, the MCU outputs a control signal to a motor controller according to the current riding state signal; and c, the motor controller controls a motor to output the corresponding assisting speed and assisting gear according to the control signal. According to the automatic speed changing method and device for the hybrid power bicycle, a traditional mechanical gear set type speed change device is abandoned, the MCU performs judging and analysis according to the current riding state signal transmitted by the sensor, and the motor is directly controlled to output the corresponding assisting speed, and accordingly automatic speed change and automatic gear adjusting of the hybrid power bicycle are achieved, and unnecessary judgment and operations of a rider are reduced.

Description

technical field [0001] The invention belongs to the technical field of automatic shifting, in particular to an automatic shifting method and device for a hybrid electric bicycle. Background technique [0002] Traditional electric vehicles are pure electric vehicles, that is, the rider does not need to use force, and the motor is completely controlled by the power supply. The controller of the electric vehicle is connected to a speed regulating handle, and when the handle is turned, the controller adjusts the speed of the motor accordingly. This kind of car is more popular in our country. One of the existing problems is that the driving speed is fast and unsafe, and the other is that it is always used when riding. Batteries, short battery life, need frequent charging, short battery life, increase pollution and recycling costs. [0003] Hybrid bicycles are generally called power-assisted bicycles; electric power-assisted bicycles are not only a green and environmentally frien...

AI Technical Summary

Problems solved by technology

The controller of the electric vehicle is connected to a speed regulating handle, and when the handle is turned, the controller adjusts the speed of the motor accordingly. This kind of car is more popular in our country. One of the existing problems is that the driving speed is fast and unsafe, and the other is that it is always used when riding. Battery, short battery life, frequent charging, short battery life, increased pollution and recycling costs

Generally, the position of the handlebar is equipped with a button, a dial or a dial that can adjust the power-assist gear. The user can manually adjust the gear, and change the ratio range of power output to manpower according to different road conditions, so as to achieve small power boost on flat roads and large slopes. The effect of power assist, but the problem is that the rider needs to manually press the button or dial the dial during the riding process, the experience effect is not good, the service life of the components is reduced, and there are also potential safety hazards, so a hybrid car is needed automatic transmission

The problems existing in both mechanical and electronic transmissions are that the dimensional matching accuracy between the parts is high, the processing is difficult, the processing cost is high, the yield rate is low, and the practicability is poor; source, exposed to the air, it is easy to produce rust and other phenomena, which will greatly reduce the strength of the steel wire. After the breakage, the transmission cannot be used normally. The number of teeth between the adjacent mechanical gears is not much different. When the adjacent gears are shifted, the speed difference is small, and the gear with a large speed difference must pass through the middle sprocket when shifting. Therefore, the span of the sprocket is large and the shifting time is long. , the operation is cumbersome, and the chain needs to be pedaled slowly when shifting, which brings discomfort to the rider. Therefore, it cannot meet people's requirements for light, fast, convenient and comfortable shifting

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