Steering system for motor vehicles
First Claim
1. A steering system for motor vehicles, comprising:
- a normal operating system;
an emergency operating system configured to automatically become active in response to a malfunction of the normal operating system; and
an auxiliary system at least substantially redundant to the normal operating system;
wherein the normal operating system includes a steering-angle setpoint generator actuatable by a steering handle, a steering-angle actual-value sensor actuated by steered vehicle wheels, a motorized control unit configured to control the steered vehicle wheels, and a control system configured to control the control unit in accordance with a setpoint-actual value comparison of the steering angle;
wherein, between the steering handle and steered vehicle wheels, the emergency operating system includes at least one of a mechanical and a hydraulic positive coupling which is active at least in response to emergency operation; and
wherein the auxiliary system, in response to malfunctions in the normal operating system, is configured to automatically one of become and remain active and, in a transitional phase, is configured to adapt operating characteristics of a steering arrangement to the operating mode of the emergency system, the emergency system configured to become active when the transitional phase comes to an end.
1 Assignment
0 Petitions
Accused Products
Abstract
A steering system functions in accordance with the “steer by wire” concept and has a normal operating system without positive coupling between the steering handle and the steered vehicle wheels, as well as an emergency operating system, which functions with positive coupling between the steered vehicle wheels and the steering handle. An auxiliary operating system is additionally provided, which, in response to malfunctions of the normal operating system, assumes its tasks and, in a transitional phase, adapts the performance characteristics of the steering system to those of the emergency system, which is switched on upon conclusion of the transitional phase. Thus, at the transition from the normal operating system to the emergency operating system, the driver is given time to become accustomed to the other steering performance.
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Citations
21 Claims
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1. A steering system for motor vehicles, comprising:
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a normal operating system;
an emergency operating system configured to automatically become active in response to a malfunction of the normal operating system; and
an auxiliary system at least substantially redundant to the normal operating system;
wherein the normal operating system includes a steering-angle setpoint generator actuatable by a steering handle, a steering-angle actual-value sensor actuated by steered vehicle wheels, a motorized control unit configured to control the steered vehicle wheels, and a control system configured to control the control unit in accordance with a setpoint-actual value comparison of the steering angle;
wherein, between the steering handle and steered vehicle wheels, the emergency operating system includes at least one of a mechanical and a hydraulic positive coupling which is active at least in response to emergency operation; and
wherein the auxiliary system, in response to malfunctions in the normal operating system, is configured to automatically one of become and remain active and, in a transitional phase, is configured to adapt operating characteristics of a steering arrangement to the operating mode of the emergency system, the emergency system configured to become active when the transitional phase comes to an end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification