Predictive Rollover Prevention via Route Curvature Analysis
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Solution Overview
Problem
Current vehicle stability systems, such as ESP and RSP, can only intervene briefly in rollover situations due to their reliance on current driving conditions, often failing to prevent tipping over, especially when lateral acceleration increases and cornering or braking force is reduced.
Innovation Solution
A method that calculates maximum limit speeds and necessary decelerations based on the route's curvature and longitudinal acceleration, allowing for proactive speed regulation and braking interventions to prevent rollovers, using data from on-board and external sources to anticipate and mitigate rollover risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ESP/RSP intervenes based on current driving situation only, then the system can respond to immediate rollover risks, but the intervention time is too brief to effectively prevent tipping over when lateral acceleration significantly increases
Solution Approach 1:
The system calculates maximum limit speeds and necessary decelerations for upcoming curve sections in advance, allowing the vehicle to be decelerated before entering the critical rollover zone. This preliminary action provides sufficient time for speed correction while the vehicle still has adequate cornering and braking force, resolving the contradiction between early intervention and effective prevention.
2Reliability
If the vehicle is decelerated early based on predicted route curvature, then there is sufficient time to correct speed, but additional system complexity is required for route analysis and prediction
Solution Approach 1:
The system integrates multiple functions into a unified control architecture: route curvature analysis, maximum limit speed calculation, necessary deceleration computation, and existing ESP/RSP interventions all work together through a single control device. This multi-functionality approach achieves reliable rollover prevention without proportionally increasing system complexity.
3Reliability
If maximum limit speeds are calculated based on route curvature and maximum permissible lateral acceleration, then proactive speed regulation is enabled, but the calculation complexity increases
Solution Approach 1:
The system replaces complex mechanical judgment and manual calculation with automated electronic computation of maximum limit speeds based on route curvature and vehicle parameters. The control device automatically performs the mathematical calculations and adjusts speed accordingly, reducing calculation complexity while maintaining high reliability.
Data Source
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AI summary
The invention relates to a method for preventing rollover of a vehicle or a tractor-trailer combination in bends and is characterized by at least the following steps: acquiring information about the curvature profile { / c(x)} of the section of route ( X1, x n ) lying ahead, calculating maximum limiting speeds {v maX (x)} which ensure that the section of route ( X1, x n ) lying ahead can be travelled through safely in terms of rollover, calculating longitudinal decelerations {a x need (x)} which are necessary to prevent rollover, determining a maximum necessary deceleration (a x max needed ) from the longitudinal decelerations {a x need (x)} necessary to prevent rollover ., adjusting the actual speed of the vehicle, as a function of the driving position (x) within the section of route ( X1, x n ), to the maximum limiting speed {Vmax (x)} calculated for the respective driving position (x) on the basis of the maximum necessary deceleration (ax ma org.epo.ftm.SubType@bf9755a[content={X}] needed ) in such a way that the actual speed is adjusted only for the driving positions (x) within the section of route ( X1, x n ) at which longitudinal deceleration but no longitudinal acceleration is necessary.