Integrated Steering Assembly Merging Manual and Electronic Systems
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Solution Overview
Problem
The complexity and cost of dual steering systems in vehicles, particularly in autonomous and semi-autonomous applications, are increased due to the redundancy of hydro-mechanical and electronic steering systems, which are often non-functional in specific modes, necessitating an improved steering assembly for enhanced maneuverability and reduced complexity.
Innovation Solution
A steering assembly comprising a frame, a steering column with a steering input device and controller, and a steering wheel, which provides tactical or haptic feedback and allows seamless switching between autonomous and manual modes, using electric motors and electronic control units to align the steering wheel with the actual steer angle, reducing mechanical components and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual steering system (hydro-mechanical manual steering system and path guided electronic steering system) is provided for autonomous and semi-autonomous applications, then redundant steering capability is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the hydro-mechanical manual steering system and the electronic steering system into a single integrated steering assembly. The electric motor is directly coupled to the steering gear box, combining the functions of both systems into one unified structure, thereby reducing device complexity while maintaining redundant steering capability through the controller's ability to switch between manual and autonomous modes.
Solution Approach 2:
The integrated steering assembly is designed to perform multiple functions: it can operate in manual mode when the electric motor is disengaged, and in autonomous mode when the electric motor is engaged. The single steering assembly serves both as a manual steering mechanism and an autonomous steering mechanism, eliminating the need for separate dual systems and reducing overall system complexity.
2Reliability
If a dual steering system with hydro-mechanical and electronic components is implemented, then steering redundancy is provided, but manufacturing cost increases
Solution Approach 1:
By merging the manual and electronic steering functions into a single integrated assembly with a shared steering gear box, the patent reduces the total number of components that need to be manufactured and assembled. This consolidation lowers manufacturing costs while maintaining steering redundancy through the controller's mode-switching capability between manual and autonomous operation.
Solution Approach 2:
The universal steering assembly design allows a single component to serve multiple purposes: the steering gear box handles both manual and electronic steering, and the electric motor can be engaged or disengaged based on operating mode. This multi-functionality reduces the need for separate manufacturing lines for different steering systems, thereby reducing overall manufacturing cost.
3Measurement precision
If traditional cable-type steering devices with torque detectors are used, then steering torque detection is achieved, but mechanical friction and complexity increase
Solution Approach 1:
The patent replaces the mechanical cable-type steering transmission with a direct electric motor coupling to the steering gear box. This substitution eliminates the mechanical cables and associated friction, reducing device complexity while maintaining steering torque detection capability through electronic sensors integrated into the controller system.
Data Source
AI summary
A steering assembly for a machine is provided. The steering assembly includes a frame. The steering assembly also includes a steering column mounted on the frame. The steering column includes a steering input device and a controller communicably coupled to the steering input device. The steering assembly further includes a steering wheel operably coupled to the steering column. The steering wheel is disposed adjacent to the steering input device.