Measurement of driver torque and steering angle in a torque overlay steering system
AssigneeKNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
InventorsJens-Hauke Mueller, Sven Kirschbaum
Life of this patent
Estimating the term…
Abstract
A method for determining a driver torque of a power steering assembly for an electrohydraulic power steering system of motor vehicles, includes an input shaft for introduction of a driver torque, an output shaft for driving a steering linkage and a torsion bar between the input shaft and the output shaft for actuation of a rotary slide valve, an electric drive for electrical steering assistance, and a control unit for controlling the electric drive. The power steering assembly has a sensor arrangement on the torsion bar for actuation of the rotary slide valve. An actual torque is determined with the aid of the sensor arrangement. The control unit determines a driver torque with the aid of the actual torque.
Claims19
A method for determining a driver torque of a power steering assembly, the method comprising:
- providing an electrohydraulic power steering system of a motor vehicle the electrohydraulic power steering system having an input shaft for introducing the driver torque, an output shaft for driving a steering linkage and a torsion bar between the input shaft and the output shaft for actuating a rotary slide valve, an electric drive for electrical steering assistance, and a control unit for controlling the electric drive;
- determining, via a sensor arrangement of the power steering assembly, an actual torque using the torsion bar for actuating the rotary slide valve;
- and
- determining, via the control unit, the driver torque based on the actual torque, wherein the driver torque is also determined based on an assistance output by the electric drive.
A power steering assembly for an electrohydraulic power steering system of a motor vehicle, comprising:
- an input shaft for introducing a driver torque;
- an output shaft for driving a steering linkage and a torsion bar between the input shaft and the output shaft for actuating a rotary slide valve;
- an electric drive for electrical steering assistance;
- a control unit for controlling the electric drive;
- and
- a sensor arrangement which is configured to determine an actual torque with the aid of the torsion bar for actuating the rotary slide valve, wherein the control unit is configured to determine a driver torque based on the actual torque and also based on an assistance torque output by the electric drive.
Dependencies are inferred from the claim text.