Vehicle stability control
AssigneeVisteon Global Technologies, Inc.
InventorsMichael R. Tinskey, Hualin Tan, Yohannes G. Haile
Life of this patent
Estimating the term…
Abstract
Stability is an important factor in vehicle safety. Yaw rate error can be used to improve stability. Yaw rate is measured through a yaw rate sensor. Desired yaw rate can be determined from vehicle conditions and driver input. The yaw rate error is calculated by subtracting the measured yaw rate from the desired yaw rate. Based on this calculation, yaw torque target signals can be calculated to apply torque to the wheels through the application of one or more electric drivelines. The application of torque can provide side-to-side and front-to-rear torque biasing to improve stability. Furthermore, the application of torque at specific times can improve braking and launch capabilities.
Claims12
A stability control system for an automotive vehicle comprising:
- at least one sensor means for detecting a parameter of yaw rate and translating said parameter into a yaw rate signal;
- a controller means in electrical communication with said at least one sensor means for determining a desired yaw rate, comparing said yaw rate signal with said desired yaw rate, and creating at least one yaw torque target signal for achieving said desired yaw rate and correcting stability;
- and
- at least one electric driveline in electrical communication with said controller means for receiving said at least one yaw torque target signal and making a corrective action based on said at least one yaw torque target signal.
A method for controlling the stability of a vehicle having at least one independently controlled electric driveline comprising:
- measuring a yaw rate of said vehicle and converting said yaw rate into a yaw signal;
- sending said yaw signal to a controller;
- determining a desired yaw rate;
- comparing said yaw signal to said desired yaw rate by said controller;
- calculating at least one yaw torque target signal by said controller from said yaw rate signal and said desired yaw rate;
- sending said at least one yaw torque target signal from said controller to said at least one independently controlled electric driveline;
- and
- applying at least one torque to at least one wheel based on said at least one yaw torque target signal.
Dependencies are inferred from the claim text.