Tire burst prediction device
First Claim
1. A tire burst predicting device comprising:
- wheel speed detecting means which detects a speed of a wheel;
ground contact state estimating means which estimates a physical quantity representing a ground contact state between the wheel and a road surface on the basis of the detected wheel speed;
rate of change detecting means which detects a rate of change of the estimated physical quantity representing the ground contact state between the wheel and the road surface; and
predicting means which predicts occurrence of bursting of the wheel by judging whether or not the detected rate of change is a value outside of a predetermined range.
1 Assignment
0 Petitions
Accused Products
Abstract
A tire burst predicting device which can predict occurrence of bursting of a tire and gives an alarm properly is provided.
Break point frequency estimating means 44 estimates a break point frequency on the basis of time series data of wheel speed detected at a wheel speed sensor 32 from frequency response of a first order model to which a transmission characteristic from a road surface disturbance to a wheel speed is approximated. Braking force gradient estimating means estimates a braking force gradient corresponding to the estimated break point frequency, on the basis of a map, which is prestored, representing a relationship between break point frequencies and braking force gradients. Extra high frequency component is eliminated from the estimated braking force gradient by a low pass filter 48 to reduce estimation dispersion. Differentiators 50 detect changing speed of the braking force gradient. Judging means gives an alarm of that there is a possibility of occurrence of bursting of tire in a case in which the detected changing speed is equal to or more than a predetermined threshold value.
-
Citations
4 Claims
-
1. A tire burst predicting device comprising:
-
wheel speed detecting means which detects a speed of a wheel;
ground contact state estimating means which estimates a physical quantity representing a ground contact state between the wheel and a road surface on the basis of the detected wheel speed;
rate of change detecting means which detects a rate of change of the estimated physical quantity representing the ground contact state between the wheel and the road surface; and
predicting means which predicts occurrence of bursting of the wheel by judging whether or not the detected rate of change is a value outside of a predetermined range. - View Dependent Claims (2, 3, 4)
-
Specification