Exhaust Pipe Cap Reflector Layout for Motorcycle Radar Detection
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Solution Overview
Problem
Two-wheeled vehicles are difficult to identify accurately with radar equipment due to their smaller size, and existing reflector placements can compromise appearance and assembly ease.
Innovation Solution
A straddle type vehicle design featuring a reflecting portion on the cap member of the exhaust pipe's rear end, arranged below the tail lights, with a quadrangular pyramid shape and multiple reflecting surfaces, improving identifiability and appearance while suppressing vibration-induced reflection errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reflector is merely attached to the rear portion of the vehicle body, then the identifiability is improved, but the appearance and assemblability are impaired
Solution Approach 1:
The reflector is integrated with the cap member that covers the rear end of the exhaust pipe, merging two separate components (reflector and exhaust pipe cover) into one unified structure. This integration improves assemblability by reducing the number of separate parts while maintaining the detection accuracy function through the preserved reflector geometry.
2Measurement precision
If a reflector is merely attached to the rear portion of the vehicle body, then the identifiability is improved, but the appearance is impaired
Solution Approach 1:
The reflector is combined with the cap member structure, creating a unified component that serves both functional and aesthetic purposes. The integrated design allows the reflector to be part of the exhaust pipe assembly rather than a separate attachment, improving overall appearance while maintaining detection accuracy.
Solution Approach 2:
The cap member is designed with specific local features including the reflector portion with reflective surfaces positioned at the rear end of the exhaust pipe. This localized integration allows the reflector to blend with the exhaust pipe's overall design while maintaining its radar wave reflection function, thereby improving appearance without compromising detection accuracy.
3Measurement precision
If the reflecting portion is positioned on the upper side of the vehicle body, then the radar wave reflection is maximized, but the identifiability between two-wheeled and four-wheeled vehicles is reduced
Solution Approach 1:
The reflector is positioned on the lower rear portion of the vehicle body rather than the upper side, utilizing a different spatial dimension for radar wave reflection. This lower positioning creates a distinctive reflection pattern that helps differentiate two-wheeled vehicles from four-wheeled vehicles while still achieving effective detection accuracy through strategic placement below the tail lights.
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
Enhances detection accuracy and identifiability of two-wheeled vehicles by directing radar reflections downward, improving appearance and assembly ease, and maintaining reflection accuracy during vehicle movement and turns.
Implementation Method 1
at least one reflecting portion (30) for reflecting a radar wave transmitted from a radar equipment
Data Source
AI summary
A straddle type vehicle 1 having at least one reflecting portion 30 for reflecting a radar wave transmitted from a radar equipment. The reflecting portion 30 is provided on a cap member 40 mounted on a rear end portion 9b of an exhaust pipe 9, and the reflecting portion 30 is arranged below left and right tail lights 19 when viewed from a rear side of a vehicle body.