Vehicle stability control system and method
First Claim
1. A method for performing hill hold control for a vehicle, the method comprising:
- receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate;
calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate;
calculating a road grade from the vehicle pitch angle; and
determining whether to apply a 4-wheel, service braking system of the vehicle based on the road grade, a vehicle speed or wheel speeds, a transmission status, a throttle input, and a brake status.
1 Assignment
0 Petitions
Accused Products
Abstract
Various methods of detecting or controlling vehicle stability are disclosed. Certain embodiments provide a method for performing hill hold control for a vehicle, a method for detecting a vehicle sliding into loss of control, and/or a method for controlling a vehicle'"'"'s sliding into loss of control. Methods for detecting sliding into loss of control may include comparing the vehicle'"'"'s longitudinal velocity gradient with a reference speed computed from wheel speed sensors inputs and/or detecting a lateral velocity of the vehicle and a longitudinal velocity of the vehicle when vehicle sliding is detected. Methods for control may include calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate, calculating a longitudinal velocity gradient from the vehicle pitch angle, and/or calculating a sideslip angle.
-
Citations
13 Claims
-
1. A method for performing hill hold control for a vehicle, the method comprising:
-
receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate; calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate; calculating a road grade from the vehicle pitch angle; and determining whether to apply a 4-wheel, service braking system of the vehicle based on the road grade, a vehicle speed or wheel speeds, a transmission status, a throttle input, and a brake status. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for performing hill hold control for a vehicle, the method comprising:
-
receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate; calculating a sideslip angle based on at least the lateral acceleration; calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate; calculating a longitudinal velocity gradient from the longitudinal acceleration, yaw rate, the sideslip angle, and a global pitch angle; calculating a road grade from the vehicle pitch angle and the global pitch angle; detecting back sliding using the road grade, a vehicle speed or wheel speeds, a vehicle side slip angle, and the longitudinal velocity gradient; and applying braking when back sliding is detected. - View Dependent Claims (11)
-
-
12. A method for performing hill hold control for a vehicle, the method comprising:
-
receiving signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, a pitch rate, and wheel speed; calculating a sideslip angle based on at least the lateral acceleration; calculating a vehicle pitch angle from the lateral acceleration, the longitudinal acceleration, the yaw rate, the roll rate, and the pitch rate; calculating a road grade from the vehicle pitch angle and a global pitch angle, when an inclined or decline road grade is calculated; calculating a longitudinal velocity gradient from the longitudinal acceleration, yaw rate, the sideslip angle, and the global pitch angle; detecting back sliding using the road grade, a vehicle speed or wheel speeds, the sideslip angle, and the longitudinal velocity gradient; detecting undesired acceleration of the vehicle using wheel speed; and applying braking when one or more of back sliding and undesired acceleration is detected, and maintain braking until a driver of the vehicle applies a sufficient level of braking or throttle. - View Dependent Claims (13)
-
Specification