Vehicle steering system
First Claim
1. a vehicle steering system with electronic control circuit for coupling a steering input device and steered vehicle wheels by means of a signal evaluation circuit that generates output signals for controlling a steering motor which actuates said steered vehicle wheels, said system comprising:
- a transducer actuated by the steering input devices; and
an electronic control circuit connected to receive signals from said transducer as inputs, for generating said output signals by converting such input signals with a predeterminable progressivity between changes in the input signals and changes in said output signals, said electronic control circuit having a filter that passes only those frequencies of said input signals below a transition frequency;
wherein the filter operateswith a low transition frequency when a direct translation exists for steering between the adjusting travel of steering input device and the change in the steering angle of steered wheels of the vehicle; and
with a high transition frequency when an indirect translation exists between the adjusting travel of steering input device and the change in the steering angle of steered wheels of the vehicle.
2 Assignments
0 Petitions
Accused Products
Abstract
A vehicle steering system has an electronic control system for coupling a steering device and the steered wheels of the vehicle, with the steering angle setpoint signal passing though a filter before a setpoint/actual value comparison is made. The filter passes essentially only those frequencies below an adjustable transition frequency. A switch is made to a low transition frequency when there is to be a direct translation between the steering device and the steered wheels of the vehicle.
79 Citations
5 Claims
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1. a vehicle steering system with electronic control circuit for coupling a steering input device and steered vehicle wheels by means of a signal evaluation circuit that generates output signals for controlling a steering motor which actuates said steered vehicle wheels, said system comprising:
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a transducer actuated by the steering input devices; and an electronic control circuit connected to receive signals from said transducer as inputs, for generating said output signals by converting such input signals with a predeterminable progressivity between changes in the input signals and changes in said output signals, said electronic control circuit having a filter that passes only those frequencies of said input signals below a transition frequency;
wherein the filter operateswith a low transition frequency when a direct translation exists for steering between the adjusting travel of steering input device and the change in the steering angle of steered wheels of the vehicle; and with a high transition frequency when an indirect translation exists between the adjusting travel of steering input device and the change in the steering angle of steered wheels of the vehicle. - View Dependent Claims (2)
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3. A steering angle control system for a vehicle having a steering input device for determining a steering angle for steered wheels of said vehicle and a motor for controlling angular position of said steered wheels based on said steering angle, said control system comprising
a transducer actuated by said steering input device; -
a steering set point calculator unit which generates a steering setpoint signal in response to an output from said transducer; and a low pass filter coupled to receive said steering setpoint signal as an input, and to supply a filtered steering setpoint signal to said motor for actuating said steered wheels; wherein said low pass filter has a variable pass band cutoff frequency, and operates with a low transition frequency when a direct translation exists for steering between the adjusting travel of steering input device and the change in the steering angle of steered wheels of the vehicle, and with a high transition frequency when an indirect translation exists between the adjusting travel of steering input device and the change in the steering angle of steered wheels of the vehicle. - View Dependent Claims (4, 5)
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Specification