Sensor Placement Near Center-of-Gravity in Saddle-Riding Vehicle
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Solution Overview
Problem
Saddle-riding type vehicles face challenges in accurately detecting vehicle body behavior due to the suboptimal placement of sensors, which are not typically positioned close to the vehicle's center-of-gravity, affecting the precision of behavior detection.
Innovation Solution
The vehicle design incorporates a suspension system with a swing arm and hydraulic oil damping, where a tank unit storing hydraulic oil is positioned to overlap with a sensor in a top view, allowing the sensor to be placed closer to the center-of-gravity, enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is disposed in a position close to the center-of-gravity of the vehicle body, then the measurement precision of vehicle body behavior is improved, but the device complexity increases due to the need for precise positioning and structural modifications
Solution Approach 1:
The patent merges the sensor housing with the air cleaner box structure, integrating two separate components into one unified assembly. This eliminates the need for separate sensor mounting structures and positioning mechanisms, thereby reducing device complexity while maintaining the sensor's close proximity to the vehicle body's center-of-gravity for accurate detection
Solution Approach 2:
The air cleaner box is given multiple functions: it serves both as the air cleaner housing and as the sensor housing. This multi-functionality eliminates the need for dedicated sensor mounting structures, simplifying the overall device architecture while enabling precise sensor positioning near the center-of-gravity
2Measurement precision
If the sensor is positioned closer to the center-of-gravity, then the detection accuracy of vehicle body behavior improves, but the reliability decreases due to increased exposure to road debris and harsh environments
Solution Approach 1:
The sensor is nested within the air cleaner box housing, placing it inside an existing protective structure. This nested configuration protects the sensor from road debris and harsh environments while maintaining its position close to the vehicle body's center-of-gravity for accurate behavior detection
Solution Approach 2:
The air cleaner box acts as an intermediary protective structure between the sensor and the external environment. It shields the sensor from direct exposure to road debris, dust, and moisture while allowing the sensor to maintain its optimal positioning for detection accuracy
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
This configuration enables more precise detection of vehicle body behavior by positioning the sensor near the center-of-gravity, improving accuracy and stability, while also protecting the sensor from road debris and minimizing interference from swing arm operations.
Implementation Method 1
damping is controlled by a hydraulic oil
Data Source
AI summary
A saddle-riding type vehicle includes: a vehicle body frame; a swing arm supported in a swingable manner with respect to a pivot frame of the vehicle body frame; and a rear suspension in which a link arm supported by the swing arm and the pivot frame are coupled, and damping is controlled by a hydraulic oil. In addition, the saddle-riding type vehicle includes: a sub-tank provided in the rear suspension and storing the hydraulic oil; and a detection sensor that detects behavior of a vehicle body while traveling. Moreover, in a top view of the saddle-riding type vehicle viewed from above, the sub-tank and the detection sensor are disposed so as to overlap with each other.