Diagnostic Cable Tester for Vehicle Emissions
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Solution Overview
Problem
The diagnostic cables used for vehicle emissions testing are prone to wear and tear due to frequent use, and testing their functionality is challenging without specialized equipment, leading to inefficiencies in emissions testing processes.
Innovation Solution
A device with a processor connected to multiple ports, allowing for selective testing of the diagnostic cable's communication capability, acting as a conduit between the vehicle's ECU and emissions testing device, and enabling on-spot testing without complex signal testing equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If diagnostic cables are used frequently for emissions testing, then testing efficiency is improved, but cable durability deteriorates
Solution Approach 1:
The system performs preliminary testing of the diagnostic cable before emissions testing by establishing a test communication path between the processor and OBD-II port using test software. This preliminary action detects cable faults early, preventing failed emissions tests and reducing the need for frequent cable replacement, thus improving both testing efficiency and cable durability.
2Measurement precision
If specialized testing equipment is used to test diagnostic cables, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The emissions testing device is designed with multi-functionality, serving both as the primary emissions testing instrument and as a diagnostic cable tester. The processor can selectively establish either a test communication path (for cable testing) or a communication path through the cable (for emissions testing), eliminating the need for separate specialized testing equipment while maintaining accurate cable functionality detection.
3Loss of time
If diagnostic cables are tested on-spot, then loss of time is reduced, but device complexity increases
Solution Approach 1:
The cable testing function and emissions testing function are merged into a single integrated system. The processor selectively configures the communication path to either test the cable directly or route communications through the cable to the vehicle's ECU. This consolidation enables on-spot cable testing without requiring separate equipment or complex external testing arrangements, reducing time loss while maintaining device simplicity.
Data Source
AI summary
A device includes a processor in communication with a first port, a second port and a third port. The first port is configured to communicate via a diagnostic cable with an electronic control unit of a vehicle. The diagnostic able cable has a first end configured to connect to a vehicle port and a second end configured to connect to the first port. The processor is configured to selectively test the communication capability of the diagnostic cable when the first end of the diagnostic cable is connected to the third port and the second end of the diagnostic cable is connected to the first port.