Magnetic torque overlay steering system with off-road damping
AssigneeSteering Solutions IP Holding Corporation
InventorJoel E. Birsching
Life of this patent
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Abstract
Technical solutions are described for generating a damping torque in a magnetic torque overlay (MTO) steering system. An example method includes generating a damping torque based on a vehicle speed value, a handwheel velocity value, and a differential pressure value. The method further includes detecting an off-road condition, and in response, computing an off-road damping torque signal based on one or more of the vehicle speed value, the handwheel velocity value, the differential pressure value, and a handwheel angle value. The method also includes scaling the damping torque by the off-road damping torque signal in response to detecting the off-road condition.
Claims6
A method for generating a damping torque in a magnetic torque overlay (MTO) based steering system, the method comprising:
- generating a damping torque based on a vehicle speed value, a handwheel velocity value, and a differential pressure value;
- and
- detecting an off-road condition, and in response:
- computing an off-road damping torque signal based on one or more of the vehicle speed value, the handwheel velocity value, the differential pressure value, and a handwheel angle value, wherein computing the off-road damping signal comprises:
- setting an activation value;
- and
- ramping a value of the off-road damping signal to the activation value according to a predetermined rate;
- and
- scaling the damping torque by multiplying the damping torque by the off-road damping torque signal.
A torque module of a steering system, the torque module configured to:
- generate a damping torque based on a vehicle speed value, a handwheel velocity value, and a differential pressure value;
- and
- detect an off-road condition, and in response:
- compute an off-road damping torque signal based on one or more of the vehicle speed value, the handwheel velocity value, the differential pressure value, and a handwheel angle value, wherein computing the off-road damping signal comprises:
- setting an activation value;
- and
- ramping a value of the off-road damping signal to the activation value according to a predetermined rate;
- and
- scale the damping torque by multiplying the damping torque by the off-road damping torque signal.
Dependencies are inferred from the claim text.