Intake Pipe Flow Regulating Plates for Air Flow Stability
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Solution Overview
Problem
Conventional intake pipe structures for internal combustion engines fail to adequately reduce variations in intake air detected by air flow meters, particularly under tightened emission regulations for diesel engines.
Innovation Solution
An intake pipe structure featuring a pair of flow regulating plates integrated with the outlet pipe, positioned to cover the exit of the air flow meter from opposite sides, which extends in the direction of intake air flow to stabilize and regulate air flow, reducing pressure loss and variations in intake air measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lattice-like flow regulating member is arranged upstream of the air flow meter, then variations in intake air amount are reduced, but the reduction extent is insufficient under tightened emission regulations
Solution Approach 1:
The single lattice-like flow regulating member is divided into multiple flow regulating plates arranged in sequence. This segmentation allows for progressive flow regulation, where each plate contributes to stabilizing the air flow, thereby achieving greater reduction in detection variations and better emission compliance.
Solution Approach 2:
The flow regulating plates are arranged not only upstream but also downstream of the air flow meter, creating a multi-dimensional flow regulation structure. This spatial arrangement allows for comprehensive flow stabilization at multiple locations, enhancing the overall effectiveness in reducing intake air amount variations.
2Stability of the object's composition
If flow regulating plates are positioned to cover the exit of the air flow meter, then air flow stability is improved, but pressure loss increases
Solution Approach 1:
The flow regulating plates are positioned specifically at strategic locations (upstream and downstream of the air flow meter) rather than uniformly throughout the intake pipe. This localized placement optimizes flow stability at critical points while minimizing unnecessary pressure loss in other areas.
Solution Approach 2:
Instead of using a single comprehensive flow regulating structure, the patent employs multiple partial flow regulating plates that collectively achieve the desired flow stability. This partial action approach reduces the overall pressure loss compared to a single extensive regulating structure while still providing effective flow stabilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively stabilizes air flow around the detecting portion of the air flow meter, reducing variations in intake air detection while minimizing pressure loss and simplifying manufacturing by integrating flow regulating plates within the outlet pipe, thus meeting stricter emission regulations.
Implementation Method 1
The pair of flow regulating plates is arranged in the intake pipe. The flow regulating plates are located at positions separated from the air flow meter and extend in a direction of flow of intake air to cover the exit of the air flow meter from opposite sides.
Data Source
AI summary
An intake pipe structure for an internal combustion engine is provided. The intake pipe structure includes an air flow meter arranged in an intake pipe and a pair of flow regulating plates. The air flow meter has an entrance and exits. The flow regulating plates are located at positions separated from the air flow meter and extend in a direction of flow of intake air to cover the exits of the air flow meter from opposite sides.