| 摘要 |
<p>PURPOSE:To maintain driving stability well by a method wherein duty ratio of a rear wheel driving motor is gradually reduced if a sensor output value exceeds a control value until error identification, and when the error is identified, the duty ratio is made to be zero. CONSTITUTION:A sensor signal of interest is input to a fail processing means 37 of a controller 3 for judging whether or not it is within a reference range. If a sensor output value exceeds a limiting value by the time that error identification is not reached, duty ratio of a rear wheel driving motor 9 is gradually reduced while the output exceeds the limiting value, and after it ceases to exceed the limiting value, the duty ratio is gradually increased so that when the increased duty ratio reaches calculated duty ratio, the rear wheel driving motor 9 is driven by the calculated duty ratio. If the sensor output value exceeds the limiting value until error identification is made, the duty ratio of the rear wheel driving motor 9 gradually decreases and when the error is identified, the duty ratio of the rear wheel driving motor 9 is made to be zero.</p> |
