Abstract: An intelligent electric bicycle includes a pedal drive unit, a power assist unit, a tread detector for detecting treading action on the pedal drive unit, a throttle unit for controlling output power of the power assist unit, a speed sensor, and a controller coupled electrically to the power assist unit, the tread detector, the throttle unit and the speed sensor. The controller operates in one of a user-controlled power distribution mode, an automatic drive mode and a cruise control mode according to the detected states of the pedal drive unit and the throttle unit and the moving speed of the bicycle.

Abstract: An intelligent electric bicycle includes a pedal drive unit, a power assist unit, a tread detector for detecting treading action on the pedal drive unit, a throttle unit for controlling output power of the power assist unit, a speed sensor, and a controller coupled electrically to the power assist unit, the tread detector, the throttle unit and the speed sensor. The controller operates in one of a user-controlled power distribution mode, an automatic drive mode and a cruise control mode according to the detected states of the pedal drive unit and the throttle unit and the moving speed of the bicycle.

Abstract: A residual power indicator includes a current detector for monitoring current consumption of a storage battery, and a processor unit for calculating consumed power of the storage battery. The processor unit includes a memory device for recording a reference value corresponding to the residual power of the storage battery. The reference value in the memory device is periodically updated by the processor unit to reflect actual residual power of the storage battery. A display unit is controlled by the processor unit so as to provide a visual indication corresponding to the reference value in the memory device.

Abstract: An electric-powered bicycle has a monitoring unit connected to a throttle detector, a bicycle torque detector and a bicycle speed detector so as to monitor the position of a twist grip throttle, the bicycle torque on a pedaling device, and the forward moving speed of the bicycle. The monitoring unit is further connected to a motor driver, and controls the motor driver to deactivate an electric driving motor when the twist grip throttle is in the non-operative position and the bicycle torque on the pedaling device is not over a preset limit while an electric power source for the electric driving motor is activated, and when the twist grip throttle is in the operative position, the bicycle torque is not over the present limit and the forward moving speed of the bicycle is not over a preset safety speed while the electric power source is activated, thereby resulting in enhanced user safety.