Patent ID: 6449554
Filing Date: 2002-09-10
Classification: B60L,B62K,B62M,Y02T,Y10T

Abstract:
A travel speed controller for use in an electrically powered light weight vehicle, comprising:a seat; a brake means; a battery-powered motor; a rotation transmission means for transmitting rotation of said motor to a wheel via a free gear; a wheel rotation sensor for outputting a pulse signal corresponding to a rotation rate of said wheel; a brake switch for outputting a signal corresponding to operation of said brake means; and a control circuit for calculating an acceleration based on pulse signals outputted from said wheel rotation sensor, memorizing the acceleration, and supplying to said motor a driving electric current corresponding to the memorized acceleration, wherein said control circuit subsequently calculates an acceleration based on subsequent pulse signals outputted from said wheel rotation sensor such that if the calculated subsequent acceleration exceeds the memorized acceleration, then the subsequent acceleration replaces the memorized acceleration, and if a signal is inputted from said brake switch, the memorized acceleration is erased.