Motorcycle Switch Abnormality Detection via Signal Analysis
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Solution Overview
Problem
Existing two-wheel vehicles require additional components and complex harness arrangements to detect abnormalities in clutch and auto cruise control switches, leading to increased size, cost, and noise susceptibility.
Innovation Solution
A vehicle design that uses a single clutch switch and auto cruise switch to determine abnormalities, with an ECU controlling operations based on signals from these switches, eliminating the need for a third switch and simplifying the harness arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a third switch is added for malfunction sensing, then abnormality detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the first and second switches serve multiple functions: they not only detect their primary operations (clutch manipulation and auto cruise control) but also enable abnormality detection through their signal patterns. The ECU uses the combination of signals from these two switches to determine switch abnormalities, eliminating the need for dedicated malfunction sensing switches.
Solution Approach 2:
The patent combines the abnormality detection function with the existing switch signals. Instead of separating malfunction sensing into a distinct component, the system merges the detection of switch status and abnormality into a unified signal processing approach within the ECU, using the same signal lines for both operational control and diagnostic purposes.
2Reliability
If a third switch is added for malfunction sensing, then abnormality detection capability is improved, but manufacturing cost increases
Solution Approach 1:
The existing switches are designed to perform their primary function while simultaneously providing data for abnormality detection. This multi-functionality eliminates the need for additional components that would increase manufacturing cost, as the same hardware infrastructure serves dual purposes.
3Reliability
If switches are arranged in a larger switch case, then abnormality detection capability is improved, but noise susceptibility increases
Solution Approach 1:
The patent consolidates the switch arrangement into a compact configuration where the first and second switches are positioned close to each other. This merging approach reduces the overall switch case size, thereby minimizing the antenna effect and reducing susceptibility to electromagnetic noise while maintaining the capability to detect abnormalities through signal pattern analysis.
Data Source
AI summary
The abnormality determination unit of a motorcycle determines the presence or absence of abnormalities in a clutch switch and/or a cruise cancel switch on the basis of the clutch operation signal output from the clutch switch and the cruise cancel signal output from the cruise cancel switch.