Internal Combustion Engine Throttle Flow-Area Determination
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Solution Overview
Problem
Existing methods for operating internal combustion engines lack accuracy in determining the effective flow-through area of adjustable components, such as throttle valves, under various operating conditions, leading to suboptimal control and regulation.
Innovation Solution
A method and device that determine two values representing the flow-through area using different models, one based on a triggering signal and the other on performance quantities, with the resulting value being an average of these, weighted to account for variances in the models and signals, improving accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single model is used to determine the flow-through area based on triggering signal, then the device complexity is low, but the measurement precision deteriorates under varying operating conditions
Solution Approach 1:
The determination of flow-through area is segmented into two separate models: a first model that uses the triggering signal as input, and a second model that uses performance quantities as input. Each model independently calculates a flow-through area value, and these values are then combined through averaging to produce the final result. This segmentation allows each model to be optimized for specific operating conditions while maintaining overall system accuracy.
2Reliability
If model-based control is used with simplified flow-through area determination, then the ease of operation is high, but the reliability deteriorates
Solution Approach 1:
The system implements feedback by using performance quantities (such as actual engine performance parameters) as inputs to the second model. This feedback mechanism allows the system to continuously adjust and refine the flow-through area determination based on actual operating conditions, thereby improving control reliability while maintaining manageable operational complexity through automated calculations.
Data Source
AI summary
In a method and device for operating an internal combustion engine having an adjustable component through which a gas flows and by whose setting the gas flowing through the component is influenced, at least one first value representative of a flow-through area of the component is determined in accordance with a first model as a function of a triggering signal of the component, at least one second value representative of the flow-through area of the component is determined in accordance with a second model as a function of at least one performance quantity of the internal combustion engine different from the triggering signal, and a resulting value is formed for the flow-through area as a mean of the at least one first value and the at least one second value.