Patent ID: 8930097
Filing Date: 2015-01-06
Classification: B60T,B60W

Abstract:
1. A device for evaluating transverse acceleration of an automobile vehicle, comprising: means for measuring rotational speeds of two wheels of the vehicle; a module that estimates the transverse acceleration of the vehicle from the measured speeds; and a validation module that calculates, as a function of operating parameters of the vehicle, a Boolean skidding variable which is negative if slipping of one of the two wheels is not detected, and which is positive if slipping of at least one of the two wheels is detected, in which the validation module comprises a first Boolean module that delivers a first Boolean wheel over-acceleration variable, which first Boolean module comprises first means for calculating the accelerations of the two wheels, second means for calculating a plausible acceleration threshold for the wheels as a function of the transmission ratio engaged, first means for comparison of the accelerations of each of the two wheels with respect to the plausible acceleration threshold, second means for comparison of the difference in speed between the two wheels with respect to a difference threshold, and means for storing the Boolean wheel over-acceleration variable, wherein the first Boolean module assigns a positive value to the wheel over-acceleration variable if the first means for comparison determines that the acceleration of either of the two wheels is greater than the plausible acceleration threshold, and in which, when the acceleration of either of the two wheels is not greater than the plausible acceleration threshold, the first Boolean module assigns a negative value to the wheel over-acceleration variable if the second means for comparison determines that the difference between speeds of the two wheels is less than the difference threshold, and the first Boolean module assigns a value that the wheel over-acceleration variable had at a preceding calculation time, extracted from the means for storing, to the wheel over-acceleration variable if the second means for comparison determines that the difference between speeds of the two wheels is less than the difference threshold.