Patent ID: 7500534
Filing Date: 2009-03-10
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. A vehicle that is driven with output of power to a drive shaft linked with drive wheels, said vehicle comprising: a voltage converter that converts a voltage of an accumulator into a desired form of voltage; a motor that receives a supply of electric power having the voltage converted by said voltage converter and outputs power to the drive shaft; a slip detection module that detects a slip due to spin of the drive wheels; and a controller that, in response to detection of a slip by said slip detection module, drives and controls said motor to restrict a torque output to the drive shaft with a view to converging the detected slip, and sets an initial torque for starting cancellation of the restriction of the torque output to the drive shaft, based on the restriction of the torque output, said controller driving and controlling said motor, in response to convergence of the detected slip, to apply the setting of the initial torque and thereby cancel the restriction of the torque output to the drive shaft, wherein said controller drives and controls said motor to restrain a degree of the cancellation of the torque restriction for a preset time period, which represents a time required to stabilize the voltage-converting operation of said voltage converter, after cancellation of the restriction of the torque output to the drive shaft to a level of the initial torque, to cancel the restriction of the torque output to the to the drive shaft by a slope of a first time change until elapse of the preset time period and to cancel the torque restriction by a slope of a second time change, which is greater than the slope of the first time change, after elapse of the preset time period.