Abstract: A method for minimizing a fuel consumption rate of a vehicle and a method for tracking an optimal state of charge function for a hydrostatic accumulator are provided. The first method includes the steps of providing a motor and pump, determining an efficiency of the motor and pump using an efficiency map, providing a power source, and controlling the motor independent from the pump with a controller. The controller employs the efficiency of the motor and the pump to minimize the fuel consumption rate of the vehicle. The second method includes the steps of determining the optimal state of charge control function, calculating an optimal state of charge of the hydrostatic accumulator, determining a state of charge error, calculating a corrective value, and adjusting a state of a charge based on the corrective value and the state of charge error by adjusting the charge of the hydrostatic accumulator.

Abstract: A torque ripple compensation device for a motor vehicle. The device includes an outer ring, an inner ring and a linkage. A first end portion of the linkage is connected a constraint and a second end portion of the linkage is connected to the inner ring and the outer ring. A torque in a rotating shaft is compensated, reduced and/or canceled using the device by identifying a torque spike, calculating the amplitude and/or phase of the torque spike, comparing the amplitude and/or phase of the torque spike to a pre-determined torque profile, calculating the amount of amplitude and/or phase shift from the pre-determined torque profile, determining the amount of eccentricity and/or elliptical trajectory needed to compensate, reduce and/or cancel the amount of phase and/or amplitude shift, and applying a force to the first end portion of the linkage to compensate, reduce and/or cancel the phase and/or amplitude shift calculated.

Abstract: A method for minimizing a fuel consumption rate of a vehicle and a method for tracking an optimal state of charge function for a hydrostatic accumulator are provided. The first method includes the steps of providing a motor and pump, determining an efficiency of the motor and pump using an efficiency map, providing a power source, and controlling the motor independent from the pump with a controller. The controller employs the efficiency of the motor and the pump to minimize the fuel consumption rate of the vehicle. The second method includes the steps of determining the optimal state of charge control function, calculating an optimal state of charge of the hydrostatic accumulator, determining a state of charge error, calculating a corrective value, and adjusting a state of a charge based on the corrective value and the state of charge error by adjusting the charge of the hydrostatic accumulator.