ESCL Steering Wheel Lock for Steer-By-Wire Obstruction Safety
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Solution Overview
Problem
In Steer By Wire (SBW) systems, the lack of a mechanical connection between the steering column and the rack bar allows drivers to rotate the steering wheel even when an obstacle, such as a curbstone, blocks the steering direction of the vehicle, resulting in a mismatch between the steering wheel angle and the vehicle wheel angle, which can lead to unsafe conditions.
Innovation Solution
An Electronic Steering Column Lock (ESCL) system is implemented, utilizing a vehicle information receiver, obstacle condition determiner, and ESCL controller to lock the steering wheel when an obstacle is detected, based on the difference between the steering wheel and vehicle wheel angles, and generating an ESCL control signal to control the locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Steer By Wire system is used to enable independent control of steering wheel and vehicle wheels, then steering control flexibility is improved, but the risk of unsafe conditions increases when obstacles block steering direction
Solution Approach 1:
The system applies preliminary anti-action by detecting the obstacle condition before the driver can cause unsafe steering input. The obstacle detection unit identifies when an obstacle blocks the steering direction, and the control unit preemptively limits steering wheel rotation in that direction, preventing the unsafe condition from occurring in the first place
Solution Approach 2:
The system implements feedback by continuously monitoring the relationship between steering wheel angle and vehicle wheel angle through detection units. When the detection unit identifies that the wheels are blocked while the steering wheel continues to rotate (creating an angle mismatch), this feedback triggers the control unit to activate the steering wheel lock, correcting the unsafe state
2Reliability
If additional hardware is added to prevent steering wheel rotation when obstacles are detected, then steering safety is improved, but device complexity increases
Solution Approach 1:
The steering wheel lock mechanism serves multiple functions: it acts as a normal steering lock for security purposes and simultaneously functions as an obstacle protection mechanism when activated by the control unit. This multi-functionality avoids adding dedicated hardware solely for obstacle detection and prevention
Solution Approach 2:
The system uses its own existing detection units and control mechanisms to identify obstacle conditions and trigger the steering wheel lock. The ESCL system essentially services its own safety function using components already present in the Steer By Wire architecture, rather than requiring entirely separate hardware systems
Data Source
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AI summary
An apparatus and a method for controlling steering of a vehicle can use an Electronic Steering Column Lock (ESCL) system to lock a steering wheel of a vehicle in a situation where a steering direction of a wheel of a vehicle cannot be further changed. The apparatus may comprise: a processor connected to the ESCL system; and memory storing executable instructions that, if executed by the processor, configure the processor to: receive information associated with a vehicle from at least one sensor associated with the vehicle; determine an obstacle condition, whether at least one vehicle wheel is obstructed, based on the information received from the sensor; determine a locking operation of a steering wheel, whether the steering wheel is to be locked, based on the determined obstacle condition; and generate an ESCL control signal for controlling the ESCL system based on the determined locking operation of the steering wheel.