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: 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: An adapting mechanism for controlling the speed of a variable speed fuel pump in a returnless fuel delivery system includes a demand sensor, feedforward fuel pump values, adaptive adjustments corresponding to the feedforward values, a pump controller which controls the speed of the fuel pump, a timer, a steady demand indicator, a flow error accumulator, and an adjustor. The system chooses a feedforward value which corresponds to the engine's fuel demand and combines it with the corresponding adaptive adjustment to drive the fuel pump. The system monitors the average flow error over a time interval throughout which the fuel demand is substantially steady and modifies the adaptive adjustments to reduce any error offsets beyond a predetermined acceptable level.

Abstract: A returnless fuel delivery control system is disclosed which regulates fuel rail pressure at the level needed for precise control of fuel mass flow to fuel injectors at both normal and elevated engine temperatures. This regulation is accomplished by precisely controlling the speed of the fuel pump motor as a function of the projected fuel demand based on engine RPM and injector pulse width. The projection is modified as a function of differential pressure error. The differential pressure error responds to a fuel temperature strategy which increases the target differential pressure as a function of fuel temperature.