Motor vehicles – Steering gear – With electric power assist
Reexamination Certificate
2001-09-17
2004-02-17
Morris, Lesley D. (Department: 3611)
Motor vehicles
Steering gear
With electric power assist
C180S444000, C701S041000
Reexamination Certificate
active
06691819
ABSTRACT:
BACKGROUND
Motor vehicle handling instabilities are generally a function of a combination of the yaw behavior of the motor vehicle and the motor vehicle speed. The yaw is caused by lateral movement of the motor vehicle and is most often the result of a combination of operator input and road surface conditions. Such lateral movement may occur in response to the oversteering of the motor vehicle by the operator. The encounter of the motor vehicle with an oversteer condition generally provides less than optimal handling of the motor vehicle.
SUMMARY
A steering actuator for adjusting an angle of a steerable wheel of a motor vehicle and a method for compensating for a limit handling situation are described herein. The steering actuator includes an electronic control unit, a rack translatable in opposing directions, and a sleeve assembly translatable along a length of the rack. The rack is drivable in response to an operator input and further drivable in response to a signal from the electronic control unit. The sleeve assembly is translatable along the rack in response to a signal indicative of motor vehicle behavior from the electronic control unit and is disposed in mechanical communication with the steerable wheel of the motor vehicle such that the translation of the rack or the translation of the sleeve assembly along the rack varies the angle of the steerable wheel to alter the direction of travel of the motor vehicle.
The method for compensating for the limit handling situation includes receiving an input from an operator of the motor vehicle, receiving an input signal indicative of the behavior of the motor vehicle from a sensing device, calculating an output signal from the operator input and the motor vehicle behavior input signal, and adjusting an angle of the steerable wheel based on the output signal.
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Card James Myrl
Menjak Damir
Menjak Ratko
Delphi Technologies Inc.
Morris Lesley D.
Smith Michael D.
Yeagley Daniel
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