DRIVE CONTROL DEVICE FOR ELECTRIC VEHICLE
First Claim
1. A vehicle having a propulsion device driven by an electric motor, a rider operated speed control for controlling the driving speed of said electric motor, a sensor for providing signals indicating the speed said vehicle is traveling speed, a sensor for sensing changes in the position of the rider operated speed control, a comparator for comparing changes in the position of said rider operated speed control and changes in the indicated vehicle speed in respective time periods, and a warning device for providing a warning signal when sensed the vehicle speed change in the time period exceeds a first value and the sensed change in position of the rider operated speed control is a less than a second value.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric powered vehicle and warning system wherein changes in operator demand and vehicle speed are monitored and warning is given to the operator when it is sensed or determined that the sensed speed may be in error.
-
Citations
12 Claims
- 1. A vehicle having a propulsion device driven by an electric motor, a rider operated speed control for controlling the driving speed of said electric motor, a sensor for providing signals indicating the speed said vehicle is traveling speed, a sensor for sensing changes in the position of the rider operated speed control, a comparator for comparing changes in the position of said rider operated speed control and changes in the indicated vehicle speed in respective time periods, and a warning device for providing a warning signal when sensed the vehicle speed change in the time period exceeds a first value and the sensed change in position of the rider operated speed control is a less than a second value.
- 7. A sensor failure warning method for vehicle having a propulsion device driven by an electric motor and a rider operated speed control for controlling the driving speed of the electric motor, said method comprising the steps of sensing the speed the vehicle is traveling speed, sensing changes in the position of the rider operated speed control, comparing changes in the position of the rider operated speed control and changes in the vehicle speed in respective time periods, and providing a warning signal when sensed the vehicle speed change in the time period exceeds a first value and the sensed change in position of the rider operated speed control is a less than a second value.
Specification