Understeer and oversteer detector for a motor vehicle
AssigneeJtekt Europe
InventorsAndré Michelis, Christophe Ravier, Pascal Moulaire
Life of this patent
Estimating the term…
Abstract
A method for detecting a situation of loss of grip of a vehicle provided with a steering system operated by a steering wheel, the method including a step (a) of evaluating a first indicator of loss of grip (P1) by calculating, as the first indicator of loss of grip (P1), the partial derivative ( P 1 = ∂ ψ . ∂ α ) , relative to a variable (α) representative of the angular position of the steering wheel, of a driving parameter which is representative of the yaw rate ({dot over (ψ)}) of the vehicle.
Claims9
A method for detecting loss of grip of a vehicle provided with a steering system operated by a steering wheel, the method comprising:
- (a) calculating a first indicator of loss of grip (P1) which is a partial derivative
- (
- P
-
-
- 1
- =
- ∂
- ψ
- .
- ∂
- α
- )
- of a driving parameter ({dot over (ψ)}) representative of yaw rate of the vehicle, relative to a variable (α) representative of angular position of the steering wheel;
- (b) detecting loss of grip of the vehicle based on the calculated first indicator of loss of grip (P1);
- and
- (c) controlling the vehicle based on the detected loss of grip.
Dependencies are inferred from the claim text.