Fahrrad mit elektrischem Hilfsmotor

摘要

To increase a reference for determining whether or not an assist operation (an operation to drive a motor and supply supplementary electric power) is to be carried out to a value greater than a reference for a running state when a standstill state of the electric-power supplemented bicycle is recognized from a detected pedaling force without using a speed sensor or the like and when the electric-power supplemented bicycle is found to be in a standstill state, so that an unnecessary assist operation is not carried out even if a foot is placed on a pedal thereof, applying a large pedaling force. An operating-state judging means 121 employed in an assist-reference varying means 120 has a configuration wherein a detected pedaling force T is compared to the operating-state criterion 122a. If the detected pedaling force T is found smaller than the operating-state criterion 122a, a time measuring request 121a is output to the state judging timer 123 in order to measure the length of a period in which the detected pedaling force T is smaller than the operating-state criterion 122a. If a continuation time 123a output by the state judging timer 123 to the operating-state judging means 121 is found sustained for a judgment time set in advance, the operating-state judging means 121 determines that the bicycle is in a standstill state in which case a start-reference setting request 121b is output to request a reference switching means 126 to change a pedaling-force reference to start an assist operation to a start-time assist starting reference which is greater than a run-time assist starting reference. When the electric-power supplemented bicycle enters a state in which a pedaling force exceeding the large start-time assist starting reference is applied, the pedaling-force reference is restored to the small running-time assist starting reference. $$