Brake control system
AssigneeGeneral Motors Corporation
InventorsSteven Lee Tracht, Howard Hans Ludwig, Douglass L. Carson
Life of this patent
Estimating the term…
Abstract
A vehicle yaw rate control method comprising the steps of: first estimating vehicle yaw rate responsive to a first set of criteria; second estimating vehicle yaw rate responsive to a second set of criteria, wherein the first set of criteria includes a first vehicle condition not included in the second set of criteria and wherein the second set of criteria includes a second vehicle condition not included in the first set of criteria; measuring vehicle yaw rate using a yaw rate sensor; and indicating a reverse travel condition if both of the first and second estimates have signs opposite to a sign of the measured vehicle yaw rate.
Claims6
A vehicle yaw rate control method comprising the steps of:
- first estimating vehicle yaw rate responsive to a first set of criteria;
- second estimating vehicle yaw rate responsive to a second set of criteria, wherein the first set of criteria includes a first vehicle condition not included in the second set of criteria and wherein the second set of criteria includes a second vehicle condition not included in the first set of criteria;
- measuring vehicle yaw rate using a yaw rate sensor;
- and
- indicating a reverse travel condition if both of the first and second estimates have signs opposite to a sign of the measured vehicle yaw rate.
A vehicle yaw rate control system comprising:
- a yaw rate sensor for measuring actual vehicle yaw rate;
- a plurality of sensors for sensing a plurality of vehicle conditions;
- and
- an electronic controller comprising:
- (a) a first yaw rate estimator responsive to a first set of the plurality of sensors and providing a first estimated yaw rate output,
- (b) a second yaw rate estimator responsive to a second set of the plurality of sensors and providing a second estimated yaw rate output, wherein the first set includes at least a first sensor not included in the second set and wherein the second set includes at least a second sensor not included in the first set, and
- (c) a comparator coupled to the first and second yaw rate estimators and to the yaw rate sensor and providing an output indicating a reverse travel condition if both of the first and second estimated yaw rate outputs have signs opposite to a sign of the measured vehicle yaw rate.
Dependencies are inferred from the claim text.