Fuel Injector Test Rig With Interchangeable Adaptors
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Solution Overview
Problem
Existing testing apparatuses are not suitable for testing both gasoline and diesel fuel injectors due to differences in injector assembly and pressure requirements, necessitating separate and expensive equipment for each type.
Innovation Solution
A versatile testing apparatus that uses interchangeable adaptors and a removable target assembly with a spray target pattern, allowing for visual inspection and fluid flow measurement, capable of testing both gasoline and diesel injectors with a single setup by adjusting inlet and outlet adaptors and employing a damper device to stabilize fluid pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate testing apparatus are used for gasoline and diesel injectors, then testing accuracy for each type is improved, but device complexity and cost increase
Solution Approach 1:
The testing apparatus is designed with universal adaptability to test both gasoline and diesel injectors using the same fundamental device. The apparatus can accommodate different injector types through interchangeable adaptors while maintaining a single core testing system, eliminating the need for separate dedicated equipment for each injector type.
Solution Approach 2:
The testing apparatus is divided into modular components including interchangeable adaptors for different injector types and a removable target assembly. This segmentation allows the core testing device to remain universal while specific components are changed based on the injector type being tested, simplifying the overall system while maintaining versatility.
2Reliability
If dedicated testing equipment is purchased for each injector type, then testing reliability is improved, but loss of substance (cost) increases
Solution Approach 1:
A single testing apparatus is designed to reliably test both gasoline and diesel injectors through the use of interchangeable adaptors. This universal design eliminates the need for service centers to purchase multiple separate testing equipment, significantly reducing capital investment and ongoing maintenance costs while maintaining testing reliability across different injector types.
3Measurement precision
If visual inspection by highly-trained users is used, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
A removable target assembly with a target plate serves as an intermediary tool that simplifies spray pattern assessment. The target plate provides visual references and patterns that make spray characteristics easier to evaluate, reducing the dependency on highly-trained operators while maintaining measurement accuracy through the mediating target indicators.
Data Source
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AI summary
22 DP-324753 TESTING APPARATUS ABSTRACT5 A testing apparatus for a fuel injector for delivering fuel into an internal combustion engine, in use, wherein the fuel injector under test comprises an inlet for receiving fluid to be injected during a test and a nozzle end for delivering the fluid through an injector outlet, in use, the testing apparatus comprising an upper mount (40) for receiving the inlet of the fuel injector under test; a lower mount (42) located beneath10 the upper mount for receiving the nozzle end of the fuel injector under test; and at least one of a removable inlet adaptor (52) for use with a fuel injector under test of a first type, wherein the inlet end of the fuel injector under test of the first type fits into the inlet adaptor to allow a flow of fluid to be delivered through the inlet adaptor to the fuel injector under test of the first type, the inlet adaptor being removable15 from the upper mount when the fuel injector under test is of a second type or being interchangeable with a different inlet adaptor when the fuel injector under test is of a second type; and a removable outlet adaptor (74) for use with a fuel injector under test of a first type, and being removable from the lower mount (42) when the fuel injector under test is of a second type or being interchangeable with a different20 outlet adaptor (74) when the fuel injector under test is of a second type. FIGURE 3