Engine Virtual Test Environment for RDE Mapping
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Solution Overview
Problem
Conventional Engine Management System (EMS) mapping for diesel engines cannot accurately reflect Real Driving Emission (RDE) conditions, such as road type, outdoor temperature, and traffic conditions, due to limitations in reproducing actual driving scenarios, making it difficult to meet stringent exhaust gas regulations.
Innovation Solution
An engine virtual test environment system combining physics-based and data-driven models to simulate and evaluate engine performance under various road conditions, allowing for the creation of optimized EMS mappings that can be loaded into the Electronic Control Unit (ECU) for actual engine and vehicle testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional EMS mapping is used for diesel engines, then the system is simple and easy to implement, but it cannot accurately reflect RDE conditions such as road type, outdoor temperature, and traffic conditions
Solution Approach 1:
The patent introduces a virtual test environment system as an intermediary between conventional EMS mapping and actual RDE testing. This virtual environment simulates various driving conditions (road type, temperature, traffic) and provides virtual test data that bridges the gap between simple conventional mapping and complex real-world RDE conditions, enabling accurate RDE reflection without requiring direct complex physical testing
Solution Approach 2:
The patent creates a virtual copy of the actual driving environment through the virtual test environment system. This virtual environment replicates RDE conditions (road type, outdoor temperature, pressure, traffic conditions) in a controlled digital space, allowing accurate measurement and evaluation without the complexity of actual road testing
2Reliability
If actual road testing is conducted to meet RDE regulations, then accurate RDE evaluation is achieved, but time consumption and testing complexity increase significantly
Solution Approach 1:
The patent performs preliminary testing in a virtual environment before actual RDE testing. The virtual test environment pre-evaluates EMS mapping under various RDE conditions, allowing issues to be identified and corrected beforehand. This preliminary virtual testing reduces the time and complexity of subsequent actual road testing while maintaining RDE evaluation accuracy
3Productivity
If conventional EMS mapping is used, then development time is short, but verification of difficult-to-evaluate conditions such as various road types and traffic conditions is challenging
Solution Approach 1:
The patent creates a universal virtual test environment that can simulate multiple different driving conditions (various road types, traffic conditions, temperatures, pressures) within a single system. This multi-functional virtual environment enables verification across all required conditions without needing separate physical test setups for each scenario, maintaining fast development while improving adaptability
Data Source
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AI summary
An engine virtual test environment system may include at least one memory and at least one processor configured to perform a virtual engine test and generate a virtual engine to which a physics - based model and a data - driven model are applied to replace an engine. The at least one memory may be configured to store a physics - based model representing the actual structure of an engine by any one of simulation, phenomenological relationship expression, physical characteristic change of constituent elements, a combust model, an ECU model, and an engine model, and a data - driven model representing the actual operation of the engine by any one of a test model, a mathematical model, modeling, engine DoE techniques, mathematical and statistical techniques, a driving range.