Steering apparatus for motor vehicles
First Claim
1. A steering apparatus for a motor vehicle, comprising:
- steering gear means, connected to a steering control device and to the wheels of a first vehicle axis, for steering the wheels of said first axle;
hydraulic servo means, connected to the steering gear means and to a source of hydraulic pressure, for assisting said gear means in steering the wheels of the first axle;
selectable auxiliary steering means, connected to the wheels of a second vehicle axle, for steering the wheels of said second axle when auxiliary steering is selected, and means for locking the wheels in position for straight ahead travel when auxiliary steering is not selected; and
hydraulic pressure transmitting means, hydraulically interconnecting a gear output of said steering gear means to the auxiliary steering means, for transmitting hydraulic pressure to the auxiliary steering means, when auxiliary steering is selected, in correspondence with movements of the gear output of the steering gear means, and wherein the auxiliary steering means is hydrostatically connected to the steering gear means by the hydraulic pressure transmitting means.
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Accused Products
Abstract
A steering apparatus for a motor vehicle has a steering gear connected to a first set of vehicle wheels, and a selectable auxiliary steering gear connected to a second set of wheels. The steering gear for the first wheel set is connected to a steering wheel and includes a hydraulic servo mechanism which provides steering assistance to the steering gear when the force required to turn the steering wheel exceeds a predetermined limit. A hydraulic pressure transmitting device is attached to the gear output of the steering gear and is hydraulically connected to the auxiliary steering gear. The pressure transmitting device transmits hydraulic pressure to the auxiliary steering gear, when auxiliary steering is selected, which varies in correspondence with movements of the gear output of the steering gear and which is independent of the pressure supplied to the hydraulic servo mechanism.
18 Citations
25 Claims
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1. A steering apparatus for a motor vehicle, comprising:
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steering gear means, connected to a steering control device and to the wheels of a first vehicle axis, for steering the wheels of said first axle; hydraulic servo means, connected to the steering gear means and to a source of hydraulic pressure, for assisting said gear means in steering the wheels of the first axle; selectable auxiliary steering means, connected to the wheels of a second vehicle axle, for steering the wheels of said second axle when auxiliary steering is selected, and means for locking the wheels in position for straight ahead travel when auxiliary steering is not selected; and hydraulic pressure transmitting means, hydraulically interconnecting a gear output of said steering gear means to the auxiliary steering means, for transmitting hydraulic pressure to the auxiliary steering means, when auxiliary steering is selected, in correspondence with movements of the gear output of the steering gear means, and wherein the auxiliary steering means is hydrostatically connected to the steering gear means by the hydraulic pressure transmitting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification