Vehicle Diagnostic System for Detecting Incorrect Cable Connections
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Solution Overview
Problem
Electrified vehicles face operating abnormalities due to improper connections between electric machine components, which existing technologies fail to detect effectively, leading to potential control errors and safety issues.
Innovation Solution
A diagnostic system and method that communicate a torque excitation signal to an electric machine and analyze the response signal using Fourier transforms to detect incorrect cable connections by comparing the magnitude and phase to a predefined error threshold, preventing vehicle operation if errors are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing diagnostic technologies are used, then device complexity is reduced, but measurement precision of cable connections deteriorates
Solution Approach 1:
The patent replaces physical inspection methods with signal-based diagnostic testing. A control unit communicates excitation signals through the cable connections to the electric machine and analyzes response signals to detect connection errors, substituting mechanical/connection verification with electrical signal analysis.
Solution Approach 2:
The patent introduces an intermediary diagnostic system between the cable connections and the electric machine. The control unit acts as a mediator that sends test signals through the cables and processes response signals to identify connection errors without directly inspecting the physical connections.
2Reliability
If cable connection errors are not detected, then ease of operation is maintained, but reliability of vehicle operation deteriorates
Solution Approach 1:
The patent performs preliminary diagnostic testing of cable connections before the vehicle enters normal operation. The control unit executes diagnostic tests that communicate excitation signals through the cables to the electric machine, identifying connection errors in advance to prevent unsafe operation.
Solution Approach 2:
The patent implements a feedback mechanism where the control unit analyzes response signals from the electric machine to determine cable connection status. The system provides feedback about connection correctness and can prevent vehicle operation if errors are detected, ensuring reliable operation.
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
Ensures safe and normal vehicle operation by accurately identifying incorrect cable connections before they cause control errors, thereby preventing unexpected vehicle movements and ensuring correct component connections.
Implementation Method 1
A diagnostic system and method that communicate a torque excitation signal to an electric machine and analyze the response signal using Fourier transforms to detect incorrect cable connections by comparing the magnitude and phase to a predefined error threshold
Data Source
AI summary
A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a vehicle in response to a diagnostic test performed to detect an incorrect cable connection of the vehicle.