System for determining inflating pressures of tyres mounted on a motor vehicle front and rear wheels
First Claim
Patent Images
1. System for determining the inflating pressures of tires mounted on front and rear wheels of a motor vehicle, comprising:
- means for acquiring inflating pressures of the tires of the front and rear wheels;
means or acquiring vertical accelerations of the front and rear wheels; and
means for merging the acquired pressures and the acquired accelerations to estimate the inflating pressures of the tires of the front and rear wheels,wherein the merging means comprise;
means for estimating the coefficients of stiffness of the tires of the front and rear wheels as a function of the acquired vertical accelerations of these wheels; and
means for estimating the inflating pressures of the tires of the front and rear wheels as a function of the acquired inflating pressures and of the acquired coefficients of stiffness of the tires of the front and rear wheels.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns a system for determining inflating pressure of tires mounted on a motor vehicle front and rear wheels. Said system comprises means (12, 14) for acquiring inflating pressures of the front and rear wheels, means (16, 18) for acquiring vertical accelerations of the front and rear wheels, and means (32) for emerging the acquired pressures and the acquired accelerations to estimate the inflating pressures of the front and rear tires.
22 Citations
19 Claims
-
1. System for determining the inflating pressures of tires mounted on front and rear wheels of a motor vehicle, comprising:
-
means for acquiring inflating pressures of the tires of the front and rear wheels; means or acquiring vertical accelerations of the front and rear wheels; and means for merging the acquired pressures and the acquired accelerations to estimate the inflating pressures of the tires of the front and rear wheels, wherein the merging means comprise; means for estimating the coefficients of stiffness of the tires of the front and rear wheels as a function of the acquired vertical accelerations of these wheels; and means for estimating the inflating pressures of the tires of the front and rear wheels as a function of the acquired inflating pressures and of the acquired coefficients of stiffness of the tires of the front and rear wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. System for determining the inflating pressures of tires mounted on front and rear wheels of a motor vehicle, comprising:
-
means for acquiring inflating pressures of the tires of the front and rear wheels; means or acquiring vertical accelerations of the front and rear wheels; and means for merging the acquired pressures and the acquired accelerations to estimate the inflating pressures of the tires of the front and rear wheels, wherein the merging means are adapted to implement a Kalman estimator based on a model linking the inflating pressures of the tires and the vertical accelerations of the front and rear wheels.
-
-
18. System for determining the inflating pressures of tires mounted on front and rear wheels of a motor vehicle, comprising:
-
means for acquiring inflating pressures of the tires of the front and rear wheels; means or acquiring vertical accelerations of the front and rear wheels; and means for merging the acquired pressures and the acquired accelerations to estimate the inflating pressures of the tires of the front and rear wheels, wherein the system further comprises means for diagnosing the operating state of the means for acquiring the inflating pressures and the mounting states of the tires as a function of the estimated and acquired inflating pressures and of the acquired vertical accelerations of the front and rear wheels, wherein, if an acquired inflating pressure and its associated estimated pressure differ by more than X%, where X is a predetermined number, the diagnostic means are adapted to calculate the inflating pressures of the tires of the front and rear wheels as a function of the acquired vertical accelerations of these wheels, so as to compare the acquired pressure to the calculated pressures and to determine that, if the acquired pressure corresponds to one of the calculated pressures, the tire associated to the calculated pressure corresponding to the acquired pressure has been mounted in reverse. - View Dependent Claims (19)
-
Specification