Steer-by-wire steering system with road feel
First Claim
1. A steering apparatus for a vehicle having steerable road-engaging wheels, said apparatus comprising:
- a rotatable vehicle steering wheel;
a sensor for sensing the rotational position of said steering wheel and for generating a first signal corresponding to the sensed rotational position of said steering wheel;
a first electric motor for resisting rotation of said steering wheel;
a second electric motor controlled by said first signal;
a steering gear that is actuated by said second electric motor to turn the steerable wheels of the vehicle; and
an electrical circuit that includes said first and second motors in series.
2 Assignments
0 Petitions
Accused Products
Abstract
A steering apparatus (10) for a vehicle having steerable road-engaging wheels comprises a rotatable steering wheel (11) and a sensor (12) which senses the rotational position of the steering wheel and generates a first signal corresponding to the sensed rotational position of the steering wheel (11). A first electric motor (14), when energized, resists rotation of the steering wheel (11). A second electric motor (20) is controlled by the signal generated by the sensor for sensing the rotational position of the steering wheel (11). A steering gear (130) is actuated by the second electric motor (20) to turn the steerable wheels of the vehicle. An electrical circuit (19) includes the first and second motors (14 and 20) in series.
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Citations
13 Claims
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1. A steering apparatus for a vehicle having steerable road-engaging wheels, said apparatus comprising:
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a rotatable vehicle steering wheel;
a sensor for sensing the rotational position of said steering wheel and for generating a first signal corresponding to the sensed rotational position of said steering wheel;
a first electric motor for resisting rotation of said steering wheel;
a second electric motor controlled by said first signal;
a steering gear that is actuated by said second electric motor to turn the steerable wheels of the vehicle; and
an electrical circuit that includes said first and second motors in series. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A steering apparatus for a vehicle having at least two steerable road-engaging wheels, said apparatus comprising:
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a rotatable vehicle steering wheel;
a sensor for sensing the rotational position of said steering wheel and for generating a first signal corresponding to the sensed rotational position of the steering wheel;
a first electric motor for, when actuated, resisting rotation of said steering wheel;
a second electric motor controlled by said first signal;
a first steering gear actuated by said second electric motor to turn one of said steerable road-engaging wheels;
a third electric motor controlled by said first signal;
a second steering gear actuated by said third electric motor to turn another of said steerable road-engaging wheels; and
an electrical circuit having said second and third electric motors in parallel with each other and in series with said first electric motor.
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8. A steering apparatus for a vehicle having steerable road-engaging wheels, said apparatus comprising:
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a rotatable vehicle steering wheel;
a first electric motor connected with the vehicle steering wheel, said first electric motor being energizable to resist rotation of said steering wheel;
a steering gear operable to turn the steerable wheels of the vehicle;
a second electric motor connected in a series with said first electric motor and connected with the steering gear, said second electric motor being energizable to effect operation of said steering gear; and
electrical circuitry which is connected with said first and second electric motors to conduct electrical energy from a one of said first and second electric motors to the other of said first and second electric motors to enable electrical current which effects energization of said second electric motor to also effect energization of said first electric motor. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification