Vehicle Deceleration Support Logic for Selective Auto-Brake Resumption
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Solution Overview
Problem
Conventional deceleration support devices resume automatic deceleration unexpectedly, causing driver annoyance when resuming control after a driving operation is canceled, especially when the detected object is not suitable for resuming deceleration.
Innovation Solution
A deceleration support device with an electronic control unit that determines if the detected object is specific, allowing automatic deceleration to be resumed only when the object is not specific and the driving operation is not detected, and terminated if the object is specific or the driving operation is resumed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic deceleration is resumed after driver operation is canceled, then safety is improved by preventing collisions with detected objects, but driver annoyance increases when the object is not suitable for resuming deceleration
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different object types. The ECU identifies specific objects (pedestrians, cyclists, vehicles) versus non-specific objects (animals, obstacles, road signs) and applies different deceleration resumption rules: automatic deceleration is resumed for specific objects but not for non-specific objects. This selective approach resolves the contradiction by ensuring safety for vulnerable road users while avoiding driver annoyance for irrelevant objects.
Solution Approach 2:
The patent implements dynamics by making the deceleration control system adaptive based on real-time object classification. The ECU dynamically adjusts the deceleration resumption behavior according to the type of detected object, transitioning between different control states (resume deceleration vs. maintain interruption) based on the specific situation. This dynamic response allows the system to prioritize safety when appropriate while respecting driver intent when unnecessary.
2Reliability
If automatic deceleration control is executed for all detected objects, then collision prevention is improved, but unnecessary deceleration occurs for objects that do not require it
Solution Approach 1:
The patent applies local quality by implementing object-specific deceleration control strategies. The ECU classifies detected objects into specific categories (pedestrians, cyclists, vehicles requiring collision prevention) and non-specific categories (animals, stationary obstacles, road signs). Automatic deceleration is selectively executed only for specific objects, preventing unnecessary deceleration for non-specific objects while maintaining collision prevention for vulnerable road users.
3Measurement precision
If the system distinguishes between specific and non-specific objects, then deceleration accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by implementing object-specific deceleration control strategies. The ECU classifies detected objects into specific categories (pedestrians, cyclists, vehicles requiring collision prevention) and non-specific categories (animals, stationary obstacles, road signs). Automatic deceleration is selectively executed only for specific objects, preventing unnecessary deceleration for non-specific objects while maintaining collision prevention for vulnerable road users.
Solution Approach 2:
The patent implements universality by using a single ECU to perform multiple functions: object detection, object classification, driver operation monitoring, and deceleration control. The existing autonomous emergency braking system is extended to include object type discrimination and selective deceleration resumption, rather than adding separate dedicated systems. This multi-functional approach achieves precise deceleration control while minimizing system complexity.
Data Source
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AI summary
A deceleration support device in which an electronic control unit controls a speed reduction device to execute automatic deceleration control when an object that requires deceleration of a vehicle is detected and a braking/driving operation is not detected, and interrupt the automatic deceleration control when a driving operation is detected in a situation where the automatic deceleration control is being executed, and with an object that requires deceleration of the vehicle and does not prevent the vehicle from passing through a position of the object being defined as a specific object, the electronic control unit resumes the automatic deceleration control if it is determined that the object is not a specific object, but does not resume the automatic deceleration control if it is determined that the object is a specific object, when the driving operation is not detected in a situation where the automatic deceleration control is interrupted.