Single-Track ACC Brake Threshold Logic for Emergency Assist
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Solution Overview
Problem
Existing motor vehicle systems for emergency braking in single-lane vehicles, such as motorcycles, face challenges in seamlessly integrating emergency braking assistance with distance or speed control functions without driver intervention, particularly in scenarios requiring strong and immediate braking actions.
Innovation Solution
A method that activates an emergency braking assistance function only when the driver initiates braking with an actuation intensity exceeding a second threshold value, lower than that for deactivating the distance or speed control function, ensuring the emergency braking occurs without disabling the existing distance or speed control, and terminates when the driver stops braking, maintaining driver control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the driver actuates the brake control element with high intensity to initiate emergency braking, then the braking force is sufficient to avoid collision, but the distance or speed control function is deactivated
Solution Approach 1:
The system dynamically adjusts the braking threshold values based on the operational state. The second threshold value for emergency braking assistance is set lower than the first threshold value for deactivating distance/speed control, allowing the system to provide enhanced braking while maintaining the distance control function active. This dynamic threshold management enables the system to adapt braking assistance intensity to the current driving context.
2Loss of time
If the emergency braking assistance function is activated independently of driver input, then the response time is reduced, but the driver loses control over the vehicle
Solution Approach 1:
The system performs preliminary detection and evaluation of collision risk before activating emergency braking assistance. The control device continuously monitors the environment using sensor systems and evaluates accident probability variables in advance. When a risk is detected, the system prepares to provide braking assistance, but only activates it after the driver initiates braking by actuating the brake control element, ensuring the driver maintains control while reducing response time.
3Device complexity
If the second threshold value is set equal to the first threshold value, then the system logic is simplified, but the emergency braking assistance cannot be activated without deactivating the distance or speed control function
Solution Approach 1:
The system applies different threshold values for different functional purposes. The first threshold value controls deactivation of the distance or speed control function, while the second, lower threshold value controls activation of emergency braking assistance. This local differentiation of threshold qualities enables the system to provide emergency braking assistance while maintaining the distance control function, improving reliability without excessive complexity.
Data Source
Figure 1
AI summary
The invention relates to a method for carrying out a distance or speed-regulating function for a single-track motor vehicle. According to the method, - the activated distance or speed regulating function can be deactivated by the driver by actuating a brake operating element if the actuation intensity of the braking body element exceeds a first threshold, - a risk of collision is ascertained for the single-track motor vehicle by means of a surroundings sensor system installed on the single-track motor vehicle, and - in the event of a risk of collision, an emergency brake assistance function is activated by actuating the brake operating element by means of the driver with an actuation intensity which exceeds a second threshold, said emergency brake assistance function reinforcing the brake intensity in a manner corresponding to the actuation intensity independently of the driver, wherein - the second threshold is lower than the first threshold, and - the activated distance or speed regulating function is continued with the settings provided prior to activating the emergency brake assistance function independently of the driver after the emergency brake assistance function has ended.