Power steering device for automobile
AssigneeJtekt Europe
InventorsStephane Cassar, Jean-Marc Kasbarian
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Abstract
The steering system of the invention includes a processing means (26) comprising a means for determining (30) a driving signal (S3) of the power means (25) on the basis of: a first control signal (S1) determined from the measure of a torque applied by the driver on the steering wheel by applying a gain that depends on the longitudinal speed of the vehicle; a second correction signal (S2) determined from the measure of the torque applied by the driver on the steering wheel, and a setpoint determined on the basis of at least one characteristic parameter of the lateral dynamics of the vehicle.
Claims5
A power steering system for a motor vehicle, comprising:
- torque measurement means designed to measure torque applied by a driver to a steering wheel of the motor vehicle,
- speed measurement means designed to measure longitudinal speed of the motor vehicle,
- power assistance means designed to assist with manual force applied by a driver of the vehicle to the steering wheel,
- processing means designed to drive the power assistance means, wherein the processing means comprise determining means for determining a driving signal for driving the power assistance means as a function:
- of a first control signal determined as a function of a measurement of torque applied by the driver to the steering wheel by applying a gain that is dependent on the longitudinal speed of the vehicle,
- of a second correction signal determined as a function of:
- a measure of the torque applied by the driver to the steering wheel, and
- a setpoint value determined as a function of at least one parameter characteristics of lateral dynamics of the vehicle,
- wherein the means of determining the driving signal that drives the power assistance means limits the extent to which the second correction signal is taken into consideration so as to keep the driving signal within a defined interval about a valve of the first control signal.
Dependencies are inferred from the claim text.