| 摘要 |
PROBLEM TO BE SOLVED: To enable efficient control of the running speed of an electric car by judging whether or not abnormality is present from the difference in value of speed command signals outputted by a variable resistor and by alarming the abnormality, when it exists. SOLUTION: Two or more variable resistor 1, 2 are provided on an accelerator pedal. When the pedal is pushed down, the values of the bearable resistors 1, 2 change, which makes speed command signals variable in accordance with the change. These speed command signals which are changing are inputted to an electronic controlling unit part 7 through waveform-adjusting parts 3, 4, an interface part 5 and an analog-to-digital converting part 6. Detecting the difference in value of the speed command signals each outputted by the variable resistor 1, 2, the electronic controlling unit part 7 judges that abnormality occurring to the variable resistors 1, 2 when the detected difference in value, is equal or larger than a reference level set in advance. An alarm sound emitted by an alarming part 8 for stopping an electric car enables controlling the running speed of the electric vehicle and to prevent a failure arising from the abnormality of the variable resistors. |
