Valve Device Flow Duct Cross Section Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing valve devices require significant adaptation and resource allocation to achieve different maximum mass throughputs, necessitating multiple designs for varying requirements, which is inefficient and costly.
Innovation Solution
A valve device design where a section of the flow duct adjacent to the valve seat has a cross section smaller than the inner diameter of the valve seat, allowing for adjustable mass throughput without needing new flap or seat designs, utilizing existing components and simplifying adaptation by modifying the flow duct during casting or using inserts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If different valve devices with correspondingly adapted flaps and valve seats are provided for different maximum throughput requirements, then the regulation quality at minimum mass throughput is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies universality by designing a single valve device that can serve multiple maximum throughput requirements. The flow duct is designed with a variable cross-section that can accommodate different flap and valve seat combinations while maintaining proper regulation quality. This allows one valve device to replace multiple specialized devices, reducing complexity while preserving manufacturing precision for minimum throughput regulation.
Solution Approach 2:
The patent applies local quality by varying the cross-section of the flow duct at specific locations while maintaining other sections unchanged. The flow duct has a smaller cross-section in the region of the flap and valve seat to ensure proper regulation quality, while other sections can have larger cross-sections to accommodate different maximum throughput requirements. This localized adaptation allows the same valve device to handle different throughput scenarios.
2Productivity
If the flow duct cross section is increased to achieve higher maximum mass throughput, then the productivity is improved, but the regulation quality at minimum mass throughput deteriorates
Solution Approach 1:
The patent resolves this contradiction by applying local quality to the flow duct cross-section. The flow duct is designed with different cross-sections at different locations: a smaller cross-section in the region of the flap and valve seat to maintain regulation quality, and larger cross-sections in other regions to enable higher maximum throughput. This spatial variation in cross-section allows both high productivity and precise regulation to coexist in the same device.
Data Source
AI summary
A valve device for a motor vehicle includes: a housing; a flow duct situated in the housing; and a flap arranged in the flow duct to close off the flow duct, the flap having regions in which a shaft penetrating the flap is fastened. The shaft is rotatably mounted in the housing and a valve seat is arranged in the flow duct, the valve seat being in contact with the flap in the closed position thereof. At least one portion of the flow duct adjacent to the valve seat has a cross section smaller than the inside diameter of the valve seat.