Trailer Towing Collision Braking With Jackknife Risk Suppression
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Solution Overview
Problem
Existing vehicle driving assistance systems face challenges in accurately determining whether executing collision avoidance control will lead to Jackknifing when a vehicle towing a trailer approaches an object ahead, as the moving directions of the vehicle and trailer may not correspond.
Innovation Solution
A vehicle driving assistance apparatus that includes an electronic control unit (ECU) which acquires rearward detection information and calculates the towing angle between the vehicle and trailer. The ECU determines whether to execute collision avoidance control based on this towing angle, keeping the control unexecuted if the angle is equal to or greater than a predetermined value to prevent Jackknifing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision avoidance control is executed to forcibly brake the own vehicle, then the collision with the object ahead can be avoided, but the Jackknifing of the own vehicle may occur when towing a trailer
Solution Approach 1:
The system performs preliminary determination of the towing angle before executing collision avoidance control. By calculating the towing angle in advance using rearward detection information and comparing it with the predetermined threshold, the system identifies the risk of Jackknifing before the braking action occurs, allowing it to suppress the control only when necessary
Solution Approach 2:
The towing angle calculation serves as an intermediary parameter that mediates between the collision risk detection and the collision avoidance control execution. This intermediate assessment allows the system to intelligently decide whether to execute the control, preventing Jackknifing while maintaining collision avoidance capability when safe
2Object-affected harmful factors
If collision avoidance control is not executed to prevent Jackknifing, then the own vehicle safety is maintained, but the collision with the object ahead cannot be avoided
Solution Approach 1:
The system performs preliminary determination of the towing angle before executing collision avoidance control. By calculating the towing angle in advance using rearward detection information and comparing it with the predetermined threshold, the system identifies the risk of Jackknifing before the braking action occurs, allowing it to suppress the control only when necessary
Solution Approach 2:
The towing angle calculation serves as an intermediary parameter that mediates between the collision risk detection and the collision avoidance control execution. This intermediate assessment allows the system to intelligently decide whether to execute the control, preventing Jackknifing while maintaining collision avoidance capability when safe
3Measurement precision
If the towing angle is not accurately determined, then the decision on whether to execute collision avoidance control cannot be made precisely, but additional sensors and complex calculations increase system complexity
Solution Approach 1:
The rearward detection information is designed to serve multiple functions: it detects objects behind the own vehicle for general safety monitoring, and simultaneously provides the positional data needed for towing angle calculation. This multi-functionality allows accurate towing angle determination without adding dedicated sensors solely for this purpose
Solution Approach 2:
The system uses its existing rearward detection capability to self-determine the towing angle by calculating the angle between the moving vector of the own vehicle and the moving vector of the trailer based on positional information from the rearward detection. This self-service approach avoids the need for additional specialized measurement devices
Data Source
AI summary
A vehicle driving assistance apparatus executes a collision avoidance control to avoid a collision of an own vehicle with an object ahead of the own vehicle by forcibly braking and stopping the own vehicle before the object when a collision condition that the own vehicle collides with the object, becomes satisfied. The vehicle driving assistance apparatus acquires information on a situation behind the own vehicle as rearward detection information when the own vehicle tows a trailer, acquires an angle between a moving vector of the own vehicle and a moving vector of the trailer as a towing angle. and keep the collision avoidance control unexecuted even when the collision condition becomes satisfied when a forbiddance condition that the towing angle is equal to or greater than a predetermined towing angle, is satisfied.