Variable Brake Light Intensity for Deceleration Warning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional deceleration warning systems in motor vehicles fail to accurately indicate the intensity of braking, leading to potential incorrect warnings and reduced reaction times for following drivers, especially in varying friction conditions and without ABS/ESP intervention.
Innovation Solution
A deceleration warning device that detects longitudinal acceleration values, calculates an acceleration limit value based on input parameters, and activates a warning signal through a control device with filtering and display means, distinguishing between emergency and non-emergency braking states, and adapts to driving conditions and parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If brake lights are used to indicate braking, then following drivers can detect braking action, but the intensity of braking is not communicated
Solution Approach 1:
The patent changes the parameter of brake light illumination intensity to encode braking intensity information. The control unit adjusts the brightness of the brake lights based on the detected deceleration magnitude, allowing following drivers to perceive not only that braking is occurring but also how severe it is, thereby transmitting quantitative information through a traditional binary signal.
2Reliability
If deceleration warning systems are activated in all braking situations, then following drivers receive early warning, but incorrect warnings increase in low friction conditions
Solution Approach 1:
The system dynamically adjusts the deceleration threshold for warning activation based on detected friction conditions. During ABS/ESP intervention, the threshold is raised to avoid false warnings on low-friction surfaces, while during normal braking on high-friction surfaces, the threshold remains lower to provide earlier warnings. This dynamic adaptation allows the system to maintain high reliability across varying road conditions.
Solution Approach 2:
The system uses feedback from ABS/ESP intervention status and deceleration sensor data to continuously adjust warning behavior. When ABS/ESP activates, the system learns that friction is low and suppresses warnings unless deceleration exceeds a higher threshold. This feedback mechanism enables the system to adapt to changing friction conditions in real-time, reducing incorrect warnings while maintaining safety.
3Reliability
If ABS intervention is required for warning activation, then false warnings are reduced, but warnings are delayed until ABS engages
Solution Approach 1:
The system applies partial action by using ABS/ESP intervention status as one of multiple factors in determining warning activation, rather than requiring it as a strict prerequisite. During normal braking without ABS engagement, the system can still issue warnings if deceleration exceeds the threshold, providing timely alerts. ABS intervention serves as an additional confirmation in uncertain situations, balancing early warning with false warning prevention.
4Adaptability or versatility
If multiple function levels are implemented, then system adaptability improves, but device complexity increases
Solution Approach 1:
The system performs preliminary action by having the driver pre-select their driving style (sporty or conservative) through a simple interface before driving begins. This pre-selection stores the preferred warning behavior in memory, allowing the control unit to automatically adapt to the driver's preferences during operation without requiring complex real-time analysis or multiple physical switches.
Data Source
AI summary
A deceleration warning device for reducing rear-end collisions in road traffic includes a sensor for detecting a longitudinal acceleration value, a control device receiving the longitudinal acceleration value, determining an acceleration limit value, and generating a warning signal if the longitudinal acceleration value exceeds the acceleration limit value, and a rear lighting display for displaying an alarm state when the control device emits a warning signal. Determination of the acceleration limit value is based upon a plurality of signals including an anti-lock braking system (ABS) signal and a brake pedal position signal. The control device is operable in one of three levels depending upon a detected quality of the signals.