Adapting Injection Values for Mixed Engine Operation
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Solution Overview
Problem
Current engine systems with combined intake manifold and direct injection require complete switchover to one injection type for adaptation, leading to suboptimal operating states that affect fuel consumption, exhaust gas composition, and engine behavior, such as knocking.
Innovation Solution
A method for adapting fuel injection quantities by using separate adaptation values for intake manifold and direct injection, allowing adjustments within specific ranges that include mixed operation states, with weighting factors to determine current adaptation values and offset adjustments based on distribution measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complete switchover to one injection type is performed for adaptation, then adaptation accuracy is improved, but operating state optimization is lost
Solution Approach 1:
The adaptation process is segmented into separate adaptation ranges for intake manifold injection and direct injection. Each injection type has its own adaptation range defined by specific operating state parameters, allowing independent adaptation without requiring complete switchover to a single injection type. This segmentation enables the system to maintain optimized operating states while achieving accurate adaptation for each injection mode.
2Adaptability or versatility
If adaptation values are adapted outside adaptation ranges, then continuous adaptation capability is improved, but calculation accuracy deteriorates
Solution Approach 1:
The adaptation system dynamically determines which adaptation range applies based on the current operating state. The control unit continuously monitors operating parameters and selects the appropriate adaptation range (intake manifold injection range or direct injection range) for calculating adaptation values. This dynamic selection ensures that adaptation values are only calculated and applied when the operating state falls within the valid adaptation range, maintaining calculation accuracy while enabling continuous adaptation capability across different operating conditions.
Data Source
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AI summary
The invention relates to a method for adapting adaptation values for the adaptation of fuel injection quantities of an internal combustion engine (2) to which fuel can be supplied by mixed operation of two injection types, wherein a first adaptation value for adapting a first specified injection quantity, according to which the internal combustion engine (2) is operated with a first injection type, and a second adaptation value for adapting a second specified injection quantity, according to which the internal combustion engine (2) is operated with a second injection type, are adapted, wherein the adaptation values are each adapted in defined, discrete operating-state-dependent adaptation ranges, wherein at least one of the adaptation ranges comprises operating states in which fuel is supplied to the internal combustion engine (2) by both injection types.