Vehicle Steering Control Device with Non-Return Means
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Solution Overview
Problem
Active steering systems in vehicles like tracked and non-drive wheeled vehicles face challenges in maintaining steering control and preventing shock feedback to the steering wheel, especially when the correction motor fails, as existing systems rely on hydraulic power steering which is not always implemented in these types of vehicles.
Innovation Solution
A control device with a driving differential positioned between the steering wheel and steering control means, featuring non-return means such as a pinion-worm system, screw-nut system, or transfer gearbox with a counter-torque motor to prevent force feedback from the differential to the steering wheel, ensuring direct control and damping of shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hydraulic power steering is used to compensate for shocks, then shock feedback to the steering wheel is reduced, but the device complexity and reliance on hydraulic systems increases
Solution Approach 1:
The patent extracts and eliminates the hydraulic power steering mechanism from the system, replacing it with a purely mechanical differential and non-return means. This removes the complexity of hydraulic systems while maintaining the ability to prevent shock feedback through the inherent mechanical properties of the differential and one-way clutch mechanism.
Solution Approach 2:
The patent replaces the hydraulic power steering system with a mechanical solution using a differential and non-return means (one-way clutch). This substitution eliminates the need for hydraulic components while achieving the same shock feedback prevention function through mechanical means.
2Object-affected harmful factors
If non-return means are added to prevent force feedback, then shock feedback to the steering wheel is prevented, but the device complexity increases
Solution Approach 1:
The non-return means act as an intermediary element between the differential and the steering wheel, allowing torque transmission in one direction while blocking force feedback in the opposite direction. This mediator prevents shock feedback without requiring complex active control systems.
3Reliability
If a direct link via differential is maintained for piloting, then steering control is preserved in case of motor failure, but shock feedback to the steering wheel occurs
Solution Approach 1:
The patent segments the steering control system into two independent pathways: a direct mechanical link through the differential for reliable steering control, and a separate correction path through the motor. The non-return means are placed specifically in the direct link to block shock feedback while preserving the mechanical connection for emergency piloting.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables direct control of the steering wheel even in the absence of a hydraulic power steering mechanism, effectively preventing shock feedback and maintaining vehicle piloting capabilities in the event of correction motor failure.
Implementation Method 1
the non-return means comprise a system with pinion and worm positioned between the steering wheel and the second input of the differential
Implementation Method 2
the non-return means comprise a screw-nut system coupled with a rotary/linear motion converter
Implementation Method 3
the idler shaft being able to be activated additionally by a counter-torque motor activated by the control computer
Data Source
AI summary
A control device for the active steering of a vehicle comprising a driving differential that is positioned between a steering wheel and steering control means, said differential which furthermore receives at a first input a counter-steering command supplied by a turn correction motor, wherein said steering wheel is linked to a second input of said differential by non-return means preventing any force feedback from said differential to said steering wheel.