Engine Flow Path Control Using Component Characteristic Maps
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Solution Overview
Problem
Existing control systems for internal combustion engines require extensive and time-consuming parameterization and testing on a test bench for each new engine type, and model-based control methods demand high computing power and storage, making them inefficient and costly.
Innovation Solution
A control device that uses component characteristic maps to determine control specifications for flow path components, allowing for efficient adaptation to new engine types without extensive testing or high computational demands, utilizing physical models and component maps to calculate flow path parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If characteristic maps are measured on the multicylinder engine using traditional test bench methods, then control precision is improved, but time consumption and cost increase significantly
Solution Approach 1:
The patent segments the engine testing process by measuring individual cylinder heads separately instead of measuring the complete multicylinder engine as a whole. This allows characteristic maps to be obtained for individual components (cylinder heads, flow paths) without requiring extensive multicylinder engine testing, thereby reducing time consumption while maintaining the precision needed for control applications
Solution Approach 2:
The patent performs preliminary measurements on individual cylinder heads and flow path components before assembling the complete engine. By obtaining characteristic maps of individual components in advance, the system eliminates the need for time-consuming multicylinder engine testing while ensuring accurate control parameters are available for the final engine assembly
2Measurement precision
If extensive parameterization is performed for each new engine type, then control accuracy is improved, but parameterization effort and cost increase
Solution Approach 1:
The patent divides the parameterization process into modular components, where each cylinder head and flow path component has its own characteristic map. This segmentation allows parameterization to be performed independently for each component type, making it easier to adapt to new engine types by simply replacing or updating individual component maps rather than re-parameterizing the entire engine system
Solution Approach 2:
The patent uses characteristic maps obtained from individual cylinder heads as reusable templates or copies that can be applied to similar engine configurations. Once a characteristic map is created for a particular cylinder head design, it can be copied and used for other engines with the same component design, significantly reducing parameterization effort for new engine types
3Ease of manufacture
If model-based control methods are used, then parameterization effort is reduced, but computing power and data storage requirements increase
Solution Approach 1:
The patent uses simplified characteristic maps derived from individual component measurements rather than complex comprehensive engine models. These simpler maps require less computational power to process and store, while still providing sufficient accuracy for control applications. The approach trades off some model complexity for reduced computational demands
Data Source
AI summary
A control device for an internal combustion engine includes: a flow path module which is configured for: receiving a specified value for a flow path parameter of a flow path of the internal combustion engine; and determining a control specification for a control element of the flow path depending on the specified value using at least one component characteristic map of at least one component of the flow path.