Fault-tolerant electromechanical steer-by-wire steering actuator
First Claim
1. A steering actuator for a steer-by-wire system for a motor vehicle, said vehicle having both a wheel and a steering wheel, said steering actuator comprising:
- two drive units, each said process computer providing corrective signals to one of said drive units;
two servomotors, respectively connected to one of said drive units; and
a steering control element connected to both said servomotors and to said wheel, said drive units, said process computers, and said servomotors forming respective redundant steering control systems.
1 Assignment
0 Petitions
Accused Products
Abstract
An electromechanical steering actuator for a steer-by-wire application in motor vehicles. An electronic closed-loop/open-loop control system generates steering signals for a pair of electric servomotors, which act via a gear unit on a steering control element of a rack-and-pinion steering system. The closed-loop/open-loop control system includes a pair of process computers which deliver corrective signals to the servomotors via drive units. The steering actuator is divided into two diversely redundant systems including two redundant process computers, each of which delivers corrective signals via two redundant drive units to two servomotors which act on a common steering shaft.
-
Citations
13 Claims
-
1. A steering actuator for a steer-by-wire system for a motor vehicle, said vehicle having both a wheel and a steering wheel, said steering actuator comprising:
-
two drive units, each said process computer providing corrective signals to one of said drive units;
two servomotors, respectively connected to one of said drive units; and
a steering control element connected to both said servomotors and to said wheel, said drive units, said process computers, and said servomotors forming respective redundant steering control systems. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification