Abstract: A system, method and computer program product is provided for estimating the lateral velocity of a vehicle. The method comprises providing a plurality of estimation structures, each estimation structure corresponding to one of a plurality of dynamic regions in which a vehicle may operate, determining in which of the plurality of dynamic regions the vehicle is operating to identify a first dynamic region, and generating a first regional lateral velocity estimation from a first estimation structure corresponding to the first dynamic region.

Abstract: A method for operating a vehicle electronic stability control (“ESC”) system utilizing values for a variable obtained from a primary source and a redundant source includes the steps of receiving a first value for the variable from the primary source, receiving a second value for the variable from the redundant source, generating a normalized value as a function of the first value and the second value, determining whether the primary source is operating correctly, utilizing the first value for operation of the vehicle ESC system if the primary source is operating correctly, and utilizing the second value for operation of the vehicle ESC system if the primary source is not operating correctly and the second value is not greater in absolute value than the normalized value.

Abstract: A method for measuring and storing values of sensor bias in acceleration values for a vehicle, obtained over a plurality of time periods from a sensor having a specified range of expected variability of sensor bias values, includes measuring a first value of sensor bias obtained during operation of the vehicle in a first time period, storing the measured first value of sensor bias for use in one or more subsequent time periods, measuring a second value of sensor bias obtained during operation of the vehicle in a second time period, subtracting the measured second value of sensor bias from the stored first value of sensor bias, thereby generating a sensor bias difference, and storing the measured second value of sensor bias, for reference in one or more subsequent time periods, if the sensor bias difference is within the specified range of expected variability of sensor bias values.

Abstract: A method and system, according to one embodiment of the present invention, provide a means to accurately determine the velocity of a vehicle. An initial estimation of the velocity of the vehicle is calculated based on rates of rotation of a plurality of wheels on the vehicles. If any of the wheels on the vehicle are in a brake control, or traction control, situation, the initial estimation is modified based on an acceleration of the vehicle to generate a modified estimation of the velocity of the vehicle.

Abstract: This invention describes a control method for a hydraulic coupling system that includes pressurizing a fluid in an actuator coupled to a multi-disk clutch pack to engage the clutch pack, pumping the fluid through the clutch pack to cool the clutch pack, and controlling one or more valve actuators and one or more pump-motors with a controller. The control method may incorporate pulse width modulation of the actuators, such as the actuators for the pump-motor and valve.

Abstract: This invention describes a control method for a hydraulic coupling system that includes pressurizing a fluid in an actuator coupled to a multi-disk clutch pack to engage the clutch pack, pumping the fluid through the clutch pack to cool the clutch pack, and controlling one or more valve actuators and one or more pump-motors with a controller. The control method may incorporate pulse width modulation of the actuators, such as the actuators for the pump-motor and valve.

Abstract: A method for estimating velocities of a vehicle, is disclosed and claimed. The method includes monitoring a plurality of sensors having sensor output of vehicle motion with respect to a road surface. The method includes compensating the plurality of sensor signals by a predetermined amount, calculating the velocity by gain scheduled Kalman filtering and numerical integration, and outputting the calculated vehicle velocity to the vehicle control system.

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.

Abstract: A system and a method for dynamically estimating the vehicle longitudinal and lateral velocities based on information gathered from four sensors measuring the longitudinal acceleration, lateral acceleration, wheel speed and yaw rate. The present invention provides a linear-parameter-varying state observer in conjunction with a gain scheduled state observer to provide good estimation of the vehicle motion in linear and non-linear ranges. The present invention is not dependent on variations in vehicle parameters, requires low computing power, and achieves improved estimation by adjusting the observer gains according to the changing yaw rate.

Abstract: A system and a method for dynamically estimating the vehicle longitudinal and lateral velocities based on information gathered from four sensors measuring the longitudinal acceleration, lateral acceleration, wheel speed and yaw rate. The present invention provides a linear-parameter-varying state observer in conjunction with a gain scheduled state observer to provide good estimation of the vehicle motion in linear and non-linear ranges. The present invention is not dependent on variations in vehicle parameters, requires low computing power, and achieves improved estimation by adjusting the observer gains according to the changing yaw rate.

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.