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US 2003/0150665 A1Published application
Power-assisted steering system of an automobile
AssigneeRobert Bosch GmbH
InventorsKai Weeber, Rainer Muenz
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AssigneeRobert Bosch GmbH
InventorsKai Weeber, Rainer Muenz
Estimating the term…
The invention concerns a servo-assisted steering system (1) for a motor vehicle, in which the steering system (1) comprises a steering wheel (2) for presetting a desired steering angle for the wheels (3) of the motor vehicle, driving-dynamics means (4) for superimposing a correction angle on the steering angle, said correction angle being determined with a view toward increasing the driving stability and/or the driving comfort of the motor vehicle, and a servo drive (6). To keep the efficiency of the driving-dynamics means (4) nearly constant over the entire road-speed range of the vehicle, it is proposed that the servo drive (6) be implemented as a variable torque assistance system, the degree of torque assistance (M) being dependent on the road speed (V) of the vehicle and on at least one variable of the driving-dynamics means (4) that characterizes the correction angle.
A servo-assisted steering system (1) for a motor vehicle, said steering system (1) comprising a steering wheel (2) for presetting a desired steering angle for the wheels (3) of said motor vehicle, driving-dynamics means (4) for superimposing a correction angle on said steering angle, said correction angle being determined with a view toward increasing the driving stability and/or the driving comfort of said motor vehicle, and a servo drive (6), characterized in that said servo drive (6) is implemented as a variable torque assistance system, the degree of torque assistance (M) being dependent on the road speed (V) of said motor vehicle and on at least one variable of said driving-dynamics means (4) that characterizes said correction angle.
A servo drive (6) for a motor-vehicle servo-assisted steering system (1), implemented as a variable torque assistance system and comprising a converter (7) that can be acted upon by a converter flow (Iw) and that serves as a control device for the steering angle of the wheels (3) of said motor vehicle, and means (9) for determining the converter flow (Iw) as a function of at least the road speed (V) of said motor vehicle, characterized in that the steering system (1) comprises driving-dynamics means (4) for superimposing a correction angle on said steering angle, said correction angle being determined with a view toward increasing the driving stability and/or the driving comfort of said motor vehicle, and in that said means (9) for determining said converter flow (Iw) do so as a function of at least one variable of said driving-dynamics means (4) that characterizes said correction angle.
A method for determining the converter flow (Iw) of a servo drive (6), implemented as a variable torque assistance system, of a servo-assisted steering system (1) for a motor vehicle, said servo drive (6) comprising a converter (7) that can be acted upon by said converter flow (Iw) and that serves as a control device for the steering angle of the wheels (3) of said motor vehicle, and said converter flow (Iw) being determined as a function of at least the road speed (V) of said motor vehicle, characterized in that the steering system (1) comprises driving-dynamics means (4) for superimposing a correction angle on said steering angle, said correction angle being determined with a view toward increasing the driving stability and/or the driving comfort of said motor vehicle, and in that said converter flow (Iw) is determined as a function of at least one variable of said driving-dynamics means (4) that characterizes said correction angle.
Dependencies are inferred from the claim text.