Pivoting Injector Rail Assembly for Reproducible Pressure Testing
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Solution Overview
Problem
Existing injector testing devices face inconsistencies in measurement results due to the use of flexible high-pressure hoses from different manufacturers, which can lead to variations in manufacturing tolerances and dependency on specific suppliers, affecting the accuracy and reproducibility of tests.
Innovation Solution
The design includes a swiveling rail with rigid connecting pieces that align with the injector's pressure pipe socket, eliminating the need for flexible hoses and allowing for a consistent and reproducible connection, using a fluid pump and motor mounted elastically to reduce wear and tear, and incorporating a clamping device for secure injector alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible high-pressure hoses from different manufacturers are used to connect the injector to the pressure accumulator, then the device can accommodate various injector types, but the measurement results become inconsistent and depend on specific manufacturers
Solution Approach 1:
The patent removes the flexible high-pressure hose from the connection between the pressure accumulator and the injector. By extracting this problematic flexible element, the system eliminates the source of measurement inconsistency while maintaining the ability to test different injector types through the rigid connection system.
Solution Approach 2:
The pressure accumulator is designed with multiple connection nozzles that can accommodate different injector types through rigid connections. This universal design allows the system to test various injectors while maintaining measurement consistency, replacing the need for manufacturer-specific flexible hoses.
2Ease of operation
If flexible high-pressure hoses are used to connect the fluid pump to the rail, then the components can be positioned flexibly, but the hoses are prone to wear and increase the failure rate
Solution Approach 1:
The patent combines the fluid pump, motor, and rail into a single elastically mounted assembly. This merging eliminates the need for flexible hoses between these components, as they move together as one unit, thereby reducing wear and increasing reliability while maintaining positioning flexibility through the elastic mounting.
3Adaptability or versatility
If flexible high-pressure hoses are used for connecting components, then the device can accommodate manufacturing tolerances, but the measurement accuracy and reproducibility decrease
Solution Approach 1:
The patent replaces the flexible mechanical hose connection with a rigid mechanical connection system. The rigid connection fittings and elastically mounted assembly maintain the ability to accommodate tolerances while providing the stability and precision needed for accurate and reproducible measurements.
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
This solution enhances the consistency and accuracy of measurement results, reduces the failure rate, and minimizes the dependence on specific suppliers by using rigid connectors and eliminating flexible hoses, thereby improving operational reliability and reducing production and maintenance costs.
Implementation Method 1
the fluid pump and the motor are mounted in such a way that they can pivot together with the rail... the fluid pump and the rail are elastically mounted as a single assembly, in particular via an elastic buffer/rubber buffer, on a frame of the injector test device
Implementation Method 2
The rail is mounted such that it is pivotable relative to the injector holder. In this way, the position and spatial orientation of the rail can be aligned with the fluid connection (pressure pipe nozzle) of the injector to be tested
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
An injector test device (2) comprises a fluid pump (6), designed to pump a test oil; a motor (4), mechanically connected to the fluid pump (6) and designed to drive the fluid pump (6); at least one injector holder (16) for accommodating at least one injector (18) to be tested; and a rail (10) designed to accommodate the test oil pumped by the fluid pump (6) and for fluid communication with at least one injector (18) to be tested. The rail (10) is mounted in the injector test device (2) such that it can be pivoted in relation to the at least one injector holder (16) in order to align it in relation to the injector (18) to be tested.