Vehicle Acceleration Restriction via Steering-Dependent Drive Force Limiting
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Solution Overview
Problem
Existing vehicle acceleration suppression technologies fail to effectively prevent contact between a vehicle and an obstacle when the driver makes inappropriate driving maneuvers, such as misunderstandings or incorrect manipulations.
Innovation Solution
A vehicle acceleration suppression device that limits the drive force of a vehicle to a predefined limit value based on the manipulation amount of the steering element when the relative distance to an obstacle is short and the drive force instruction exceeds a certain threshold, using sensors to detect relative distance, steering manipulation, and drive force necessity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive force is limited based on steering manipulation amount and relative distance, then contact between vehicle and obstacle is suppressed, but drive force instruction manipulation freedom is restricted
Solution Approach 1:
The system dynamically changes the drive force limit value based on multiple parameters including steering manipulation amount, relative distance to obstacle, and vehicle speed. By adjusting the limitation parameters according to the actual driving situation, the system achieves reliable contact suppression while minimizing unnecessary restrictions on normal driving operations.
Solution Approach 2:
The drive force limitation is not fixed but dynamically adjusted based on real-time detection of steering manipulation amount, relative distance, and other driving conditions. This dynamic control allows the system to be restrictive only when necessary for safety while maintaining full operational freedom during normal driving.
2Reliability
If drive force is limited when relative distance is short and steering manipulation is large, then contact suppression is effective, but normal driving acceleration is affected
Solution Approach 1:
The system applies drive force limitation in advance when detecting conditions that may lead to contact (short relative distance combined with large steering manipulation). By preemptively restricting drive force before contact occurs, the system prevents accidents while only temporarily affecting acceleration during critical situations.
Solution Approach 2:
The drive force limitation is applied selectively based on local driving conditions - specifically when both relative distance is short and steering manipulation amount is large. During normal driving conditions, the limitation is not applied, so vehicle acceleration and performance are completely unaffected.
Data Source
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AI summary
A vehicle acceleration suppression device includes an obstacle relative distance detector (32) configured to detect a relative distance between a vehicle and an obstacle, a drive force manipulation amount detector (34) configured to detect a drive force manipulation amount that is a manipulation amount of an accelerator pedal (30), a steering manipulation amount detector (36) configured to detect a steering manipulation amount that is the manipulation amount of the steering manipulation element, and a drive force limit unit (44) configured to limit the drive force of the vehicle to a predefined drive force limit value, depending on the steering manipulation amount detected by the steering manipulation amount detector (36), when the relative distance detected by the obstacle relative distance detector (32) is equal to or shorter than a predefined limiting relative distance and the drive force manipulation amount detected by the drive force manipulation amount detector (34) exceeds a predefined drive force manipulation amount threshold.