Speed control system of power assistant bicycle

Abstract

The invention discloses a speed control system of a power assistant bicycle. The speed control system comprises pedals driven through treading, a power assisting motor used for assisting the power assistant bicycle in driving, and a battery for providing power form operation of the power assisting motor. A speed sensor is used for detecting the driving speed value of the power assistant bicycle. A main controller is electrically connected to the power assisting motor, the battery and the speed sensor. A constant-speed driving set value is set in the main controller, the main controller receives the driving speed, detected by the speed sensor, of the power assistant bicycle, and compares the driving speed value with the constant-speed driving set value, and accordingly, output of the power assisting motor and the battery is controlled. In this way, the driving speed of the bicycle directly serves as a control parameter, the speed of the power assistant bicycle is changed immediately, a rider can effectively and obviously feel the speed sense formed by the driving force which is applied to a bicycle body through the power assisting motor, the rider does not need to tread laboriously, and the use advancement of easy riding is achieved.

Description

technical field [0001] The invention relates to the technical field of controlling auxiliary power output of a power-assisted vehicle, in particular to a speed control system of a power-assisted vehicle. Background technique [0002] At present, riding a bicycle has become an indispensable means of transportation for ordinary people. It not only has the functions of walking, sports and fitness, but the mechanical device of the bicycle alone requires the rider to overcome all the resistance in the real road conditions (such as climbing a hill) by manpower. resistance and air resistance), it will be relatively difficult for those with poor physical fitness; recently, the industry has introduced bicycle structures with auxiliary power, but the mechanisms for providing auxiliary power are different. [0003] For example, the patent case of "Transmission System of Bicycle" in China Taiwan Announcement No. M520049, the patent is as described in claim 1: "1. A transmission system o...

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Problems solved by technology

[0004] However, the transmission sensing module of the above known patent detects the rotation of the transmission assembly, which is only the change of the transmission resistance inside the car body. As stated in its specification, it only includes the torque signal and a plurality of gear wheel speed signals, although these two The internal parameters of the car body will also affect the speed of the car, but its control operation is relatively indirect and complicated, and cannot directly reflect the speed change of the car body, which will cause the following two disadvantages:

[0005] 1. Because the driving force applied to one of the rear wheel assemblies by the plurality of drive units cannot significantly change the speed of the bicycle, and it is impossible for the rider to have a significant effect on the speed formed by the driving force applied to the rear wheel assembly by the drive units. Feel the fatigue and hard work that the rider still needs to step on

[0006] 2. The conventional patent disclosed above controls the indirect parameters through the torque signal and a plurality of gear wheel speed signals. Due to the complicated connection of the control structure, the structure is complicated and the cost is increased.

[0007] Therefore, how to solve the problem of how to make the rider obviously feel the sense of speed formed by the driving force exerted by the drive unit on the rear wheel assembly in view of the conventional patent disclosed above can cause fatigue and hard work for the rider to pedal hard, and cause control The creators who improve the shortcomings such as the complexity of the structure are the difficulties to be solved for this case.

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