Four-Wheel Corner Module Steering for Stable Braking on Slopes
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Solution Overview
Problem
Existing electric vehicles with integrated in-wheel motors face challenges in maintaining stability and control during braking on inclined slopes, as existing systems do not effectively manage the steering of individual wheels to counteract the effects of gravity.
Innovation Solution
A corner module apparatus that includes processors and a controller to independently control the steering of four wheels based on a direction angle relative to the slope, aligning down and up wheels according to predefined rules to maintain vehicle stability during braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If independent steering control of four wheels is implemented based on direction angle, then vehicle stability on slopes is improved, but device complexity increases
Solution Approach 1:
The steering control system is segmented into independent control units for each wheel, allowing individual adjustment of down wheels and up wheels based on direction angle. This segmentation enables precise stability control on slopes by treating each wheel's steering independently rather than as a unified system.
Solution Approach 2:
The steering control system dynamically adjusts wheel alignment based on real-time direction angle measurements. The controller continuously monitors the angle between the vehicle's longitudinal axis and the slope's inclined direction, automatically modifying steering angles of individual wheels to maintain optimal stability during braking on slopes.
2Measurement precision
If wheel alignment rules are applied based on direction angle areas, then braking control precision is improved, but measurement and detection difficulty increases
Solution Approach 1:
The system pre-establishes three direction angle areas with predetermined alignment rules before actual braking operations. These predefined areas (first area: 0° to first reference angle, second area: first reference angle to second reference angle, third area: second reference angle to 90°) allow the controller to quickly select appropriate steering strategies without complex real-time calculations, improving response precision while simplifying measurement requirements.
Data Source
AI summary
Disclosed is a corner module apparatus for a vehicle. The corner module apparatus includes processors configured to receive a braking initiation manipulation input of a vehicle from a driver. The corner module apparatus also includes a controller configured to perform braking of the vehicle by independently controlling steering of four wheels of the vehicle based on a direction angle when the braking initiation manipulation input is received by the one or more processors in a state in which the vehicle is positioned on the slope. The direction angle is an angle between an inclined direction of a slope and a longitudinal direction of the vehicle.