Patent ID: 8725377
Filing Date: 2014-05-13
Classification: B60K,B60W

Abstract:
1. A drive force-limiting device for limiting a drive force that acts on a drive wheel of a vehicle, the drive force-limiting device comprising at least one processor, the at least one processor comprising: an acceleration correction unit for correcting a first acceleration of the vehicle and obtaining a corrected first acceleration as a second acceleration; a first calculation unit for calculating a first speed of the vehicle on the basis of a wheel speed of the drive wheel and the first acceleration; a second calculation unit for calculating a second speed of the vehicle on the basis of the wheel speed and the second acceleration; a request unit for requesting a limiting drive force for limiting the drive force in a case that a difference between the first speed and the second speed is equal to or greater than a first threshold value; and an estimation unit in which the second speed is set as an estimated speed of the vehicle, wherein the first speed is calculated by subtracting a previous wheel speed from a current wheel speed to arrive at a first subtraction result, converting the first acceleration into a first limit value, and adding a minimum of the first subtraction result and the first limit value to the previous wheel speed; the second speed is calculated by subtracting the previous wheel speed from the current wheel speed to arrive at a second subtraction result, converting the second acceleration into a second limit value, and adding a minimum of the second subtraction result and the second limit value to the previous wheel speed; and the request unit requests the limiting drive force, whereby, when the wheel speed is less than a second threshold value, the estimation unit resets the second speed to equal the first speed and sets the estimated speed to the second speed.