| 摘要 |
<p>The electric bicycle (1) is equipped with a central electric motor (2) to assist the drive of the chainwheel (3), which uses a chain (8) to power a driven wheel (9). In order to eliminate the shocks and stress on the front derailleur (14) of chainwheel (3), rear derailleur (17), and other parts of the bicycle (1) when shifting gears while the electric motor (2) is providing power, in accordance with the invention, the bicycle (1) is equipped with motion sensors (22, 23), which detect the movement of the front and rear derailleur shifter (12, 15) or inner cables (13, 16), and using an electrical signal fed to the electronic control unit (20) cause the elimination of the effect of the electric motor (2) or a reduction of its torque acting on the chainwheel (3) during gear shifting. The design improves riding comfort and increases the life span of the gearshifting equipment, particularly allowing for a wide use of multi-row chainwheels (3) with front derailleurs (14) in combination with a central electric motor (2) on power assisted electric bicycles (1).</p> |
