Quick Connect Testing Jig for Vehicle Emissions Sampling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The variability in vehicle exhaust system geometry and exhaust tip designs poses challenges for creating a universal, sealed connection between vehicle emissions sources and testing equipment, making it difficult to perform accurate mass flow analysis and particulate measurement without dilution by ambient air.
Innovation Solution
A quick connect testing jig or adaptor assembly with a cylindrical conduit and extension arm, featuring a drive mechanism to exert compressive force for a secure connection to the exhaust pipe, allowing for alignment and secure engagement with the vehicle's structural support, ensuring an airtight seal and accommodating various exhaust system configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a universal adaptor is used to connect to various exhaust outlets, then adaptability is improved, but sealing reliability deteriorates due to geometric variations
Solution Approach 1:
The extension arm is designed to be movable rather than fixed, allowing it to dynamically adjust its position and the gripping force applied to the exhaust outlet. This dynamic adjustment enables the adaptor to accommodate various exhaust geometries while maintaining a reliable seal through controlled compression forces.
Solution Approach 2:
The drive mechanism changes the physical state of the extension arm by converting rotational motion into linear displacement, thereby changing the compression parameter applied to the exhaust outlet. This parameter change allows the seal to adapt to different outlet geometries while maintaining adequate sealing force.
2Adaptability or versatility
If a movable extension arm with drive mechanism is added, then adaptability to various exhaust geometries is improved, but device complexity increases
Solution Approach 1:
The drive mechanism serves multiple functions: it actuates the extension arm for positioning, applies compression force for sealing, and can be operated manually or automatically. This multi-functionality reduces the need for separate mechanisms, thereby limiting the increase in overall device complexity while achieving adaptability.
3Reliability
If compressive force is applied to ensure sealed connection, then sealing reliability is improved, but ease of operation deteriorates due to additional drive mechanism
Solution Approach 1:
The drive mechanism is designed to be self-actuating through a manual release lever that the operator can directly manipulate. The operator inserts the adaptor, the drive mechanism automatically applies compression for sealing, and the operator can release it by pulling the lever. This self-service design maintains ease of operation while ensuring reliable sealing.
Data Source
AI summary
Systems and methods are provided for temporarily coupling an emission sampling device to a vehicle. The system may include an adaptor having a body and a conduit secured to a body. The conduit may define a coupling portion for connection to a source of emissions. An extension arm may be provided movably coupled to the body, including a gripping end configured to align with and grippingly engage a structure of the vehicle. A drive mechanism may be provided for displacing the extension arm with respect to the body. The gripping end of the extension arm may cooperate with the structure of the vehicle and the drive mechanism to exert a compressive force between the coupling portion of the conduit and the source of emissions.