Adaptive On-Board Diagnosis Triggering for Vehicle Emissions
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Solution Overview
Problem
On-board diagnostics in vehicles are often unreliable and infrequently performed, especially in specific operating conditions such as city traffic, leading to inefficient fault detection and increased emissions.
Innovation Solution
A method that compares on-board diagnosis data from multiple vehicles of the same type to determine optimal triggering conditions and software versions, adjusting these parameters to improve diagnostic frequency and quality, using a central server to collect and analyze data from vehicles and comparison vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If on-board diagnosis is triggered only at specific operating points determined in manufacturing calibration, then the diagnosis can be reliably performed at those points, but the diagnosis frequency becomes very low when the vehicle is used in typical areas (e.g., city traffic) that cannot reach those operating points
Solution Approach 1:
The patent applies dynamics by making the triggering condition adaptive rather than fixed. The control device dynamically adjusts the triggering condition for on-board diagnosis based on driving style recognition and area of use identification. Instead of relying on a static operating point set during manufacturing, the system continuously modifies triggers to match actual vehicle usage patterns, thereby increasing diagnosis frequency while maintaining reliability across diverse operating conditions.
2Measurement precision
If the triggering condition is set to reach specific operating points, then the diagnosis can detect faults at those points, but the diagnosis is carried out only rarely when the vehicle operates in city traffic or other typical areas that cannot reach those operating points
Solution Approach 1:
The patent applies parameter changes by modifying the triggering conditions for on-board diagnosis based on recognized driving styles and identified areas of use. The system changes parameters such as RPM thresholds, load conditions, and duration requirements dynamically. For example, when city traffic is detected, the system adjusts triggers to activate at lower RPM ranges and shorter durations, ensuring faults are detected within typical urban driving patterns rather than requiring freeway-style operating conditions.
3Reliability
If on-board diagnosis is performed only at specific operating points, then the diagnosis can be meaningfully interpreted, but the diagnosis coverage is limited and many faults may remain undetected
Solution Approach 1:
The patent applies universality by creating a multi-functional diagnosis system that adapts to multiple driving styles and areas of use. The control device recognizes different driving patterns (e.g., aggressive, economical, sporty) and identifies various areas of use (e.g., city traffic, highway, mixed driving), then applies appropriate triggering conditions for each. This universal approach ensures comprehensive fault detection coverage across all typical vehicle operating conditions while maintaining meaningful and reliable diagnosis results for each specific context.
Data Source
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AI summary
The invention relates to a method for modifying the on-board diagnostics of a vehicle (100), wherein, during the on-board diagnostics, a diagnosis of components of the vehicle (100) is performed upon the occurrence of a specific trigger condition, and wherein data relating to the on-board diagnostics are transmitted from the vehicle (100) to a server (150), this transmitted data is compared in the server (150) with data relating to on-board diagnostics transmitted by comparison vehicles (100a, 100b, 100c), and, based on this comparison, a modification of the on-board diagnostics of the vehicle (100) is carried out. In particular, during the modification of the on-board diagnostics of the vehicle (100), a new version of software of a control unit (120) of the vehicle (100), in particular a new version of operating software, is installed. In particular, this new version of the software includes a modified, improved trigger condition.