METHOD AND SYSTEM FOR ESTIMATING A CORNERING LIMIT OF AN AUTOMOTIVE VEHICLE AND A COMPUTER PROGRAM PRODUCT FOR CARRYING OUT SAID METHOD
First Claim
1. A method for estimating a cornering limit of an automotive vehicle, comprising:
- sensing vehicle operating conditions and a vehicular yaw rate;
detecting a lateral acceleration of the vehicle and determining whether the lateral acceleration is equal to zero;
calculating vehicle parameters and a yaw rate reference value;
calculating a yaw rate error on a basis of the yaw rate reference value and a previously sensed vehicular yaw rate;
estimating whether the vehicle operating conditions, the vehicle parameters and the yaw rate error are within a predetermined range of given thresholds, responsive to a driving situation of a condition if the lateral acceleration is determined as being unequal to zero;
triggering a driver warning if the vehicle operating conditions, the vehicle parameters and the yaw rate error are within a predetermined range of the thresholds; and
controlling the vehicle operating conditions so that the vehicle operating conditions, the vehicle parameters and the yaw rate error are within the predetermined range of the thresholds.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and a system are provided for estimating a cornering limit of an automotive vehicle and a computer program product with a computer method code for carrying out the method. The method includes, but is not limited to sensing vehicle operating conditions and a vehicular yaw rate {dot over (Ψ)}; detecting a lateral acceleration ay of the vehicle calculating vehicle parameters a yaw rate reference value {dot over (Ψ)}ref, and a yaw rate error {dot over (Ψ)}error on the basis of the yaw rate reference value {dot over (Ψ)}ref and the vehicular yaw rate {dot over (Ψ)}. If the lateral acceleration ay is determined as being unequal to zero, it is estimated whether the vehicle operating conditions, the vehicle parameters and the yaw rate error {dot over (Ψ)}error are within a predetermined range of given thresholds. If the vehicle operating conditions, the vehicle parameters and the yaw rate error {dot over (Ψ)}error are within a predetermined range of the given thresholds, a warning step (f) of triggering a driver warning and/or a control step (g) of controlling the vehicle operating conditions are performed.
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Citations
20 Claims
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1. A method for estimating a cornering limit of an automotive vehicle, comprising:
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sensing vehicle operating conditions and a vehicular yaw rate; detecting a lateral acceleration of the vehicle and determining whether the lateral acceleration is equal to zero; calculating vehicle parameters and a yaw rate reference value; calculating a yaw rate error on a basis of the yaw rate reference value and a previously sensed vehicular yaw rate; estimating whether the vehicle operating conditions, the vehicle parameters and the yaw rate error are within a predetermined range of given thresholds, responsive to a driving situation of a condition if the lateral acceleration is determined as being unequal to zero; triggering a driver warning if the vehicle operating conditions, the vehicle parameters and the yaw rate error are within a predetermined range of the thresholds; and controlling the vehicle operating conditions so that the vehicle operating conditions, the vehicle parameters and the yaw rate error are within the predetermined range of the thresholds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for estimating a cornering limit of an automotive vehicle, the system comprising:
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a vehicular velocity sensor adapted to detect a vehicular velocity; a steering wheel angular displacement sensor adapted to detect a steering angular displacement of a vehicular steering wheel; a yaw rate sensor adapted to detect a vehicular yaw rate; a lateral acceleration sensor adapted to detect a lateral acceleration of the vehicle; and an electronic control unit configured to; receive the vehicular velocity; receive the steering angular displacement of a vehicular steering wheel; receive the vehicular yaw rate; receive the lateral acceleration of the vehicle; determine whether the lateral acceleration is equal to zero; calculate a yaw rate reference value, a yaw acceleration and a steering wheel angular velocity of the vehicular steering wheel; calculate a yaw rate error; estimate if the vehicle operating conditions and the vehicle parameters are within a predetermined range of given thresholds; and initiate an alarm signal if the vehicle operating conditions and the vehicle parameters are within a predetermined range of the thresholds; and a driver warning responsive to the alarm signal. - View Dependent Claims (15, 16, 17)
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18. A computer readable medium embodying a computer program product, said computer program product comprising:
a program for estimating a cornering limit of an automotive vehicle, the program configured to; sense vehicle operating conditions and a vehicular yaw rate; detect a lateral acceleration of the vehicle and determining whether the lateral acceleration is equal to zero; calculate vehicle parameters and a yaw rate reference value; calculate a yaw rate error on a basis of the yaw rate reference value and a previously sensed vehicular yaw rate; estimate whether the vehicle operating conditions, the vehicle parameters and the yaw rate error are within a predetermined range of given thresholds, responsive to a driving situation of a condition if the lateral acceleration is determined as being unequal to zero; trigger a driver warning if the vehicle operating conditions, the vehicle parameters and the yaw rate error are within a predetermined range of the thresholds; and control the vehicle operating conditions so that the vehicle operating conditions, the vehicle parameters and the yaw rate error are within the predetermined range of the thresholds. - View Dependent Claims (19, 20)
Specification