Tilt Angle Sensor Layout on Vehicle Frame Loop
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Solution Overview
Problem
Existing tilt angle sensor layouts in vehicles are susceptible to centrifugal forces and vibrations, and require modifications to the fuel tank and other components, while also being vulnerable to flying debris.
Innovation Solution
A tilt angle sensor layout structure where the sensor is positioned on a frame loop of the vehicle body frame, near the steering mechanism, enhancing rigidity and protection from debris, and integrating a relay for fuel control close to the sensor to reduce wiring noise and length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tilt angle sensor is positioned near the steering shaft and fuel tank, then it is less influenced by centrifugal force during turning, but it requires forming a large recessed portion or spacing away from rollover sensors, which influences the shape and layout of the fuel tank
Solution Approach 1:
The vehicle body frame is segmented into multiple frame members that form a frame loop structure. The tilt angle sensor is attached to this segmented frame structure, allowing it to be positioned near the steering mechanism while avoiding interference with the fuel tank and rollover sensors. The frame members are connected to form a loop that provides both structural support and sensor mounting capability.
Solution Approach 2:
The solution moves the tilt angle sensor from a conventional position near the fuel tank to a new spatial dimension on the frame loop. This dimensional relocation allows the sensor to be close to the steering shaft (reducing centrifugal force influence) while maintaining adequate spacing from the fuel tank and rollover sensors, thus resolving the spatial conflict without modifying the fuel tank shape.
2Reliability
If the rollover sensors are disposed at the center of turning of the vehicle, then the possibility of sensors being influenced by centrifugal force is reduced, but it requires modifying the fuel tank and other component layouts
Solution Approach 1:
The frame loop structure serves multiple functions: it provides structural support for the vehicle body, acts as a mounting platform for the tilt angle sensor, and enables positioning near the center of turning. This multi-functional design allows the sensor to be located optimally without requiring separate modifications to the fuel tank or other components, thereby reducing overall device complexity.
3Reliability
If the tilt angle sensor is attached to a higher-rigidity portion of the vehicle body frame, then the influence of vibrations is minimized, but it may increase exposure to flying stones from the front side
Solution Approach 1:
The tilt angle sensor is nested within the protective enclosure formed by the frame loop. The frame members connect to create a loop structure that physically shields the sensor from flying stones and debris coming from the front side, while the sensor remains attached to the high-rigidity portion of the frame for vibration resistance. This nesting arrangement provides both protection and structural stability.
4Reliability
If the tilt angle sensor is protected from flying stones, then durability is improved, but it may require additional protective structures that increase device complexity
Solution Approach 1:
The frame loop structure is designed to serve dual purposes: it provides structural support for mounting the sensor and simultaneously acts as a protective shield against flying stones. By integrating these two functions into a single structure, the solution improves sensor protection without requiring additional separate protective components, thereby avoiding increased device complexity.
Data Source
AI summary
In a saddle-type vehicle having at least three wheels, a tilt angle sensor layout structure is provided which ensures that a tilt angle sensor is minimally influenced by a centrifugal force or vibration of a vehicle body while the vehicle is turned, and the tilt angle sensor is protected against flying stones and the like. The vehicle includes an engine, and a fuel injection system for supplying fuel from a fuel tank to the engine, with a steering mechanism including a steering shaft provided on the front side of the vehicle body. A plurality of frame members constituting the vehicle body frame supporting the steering mechanism are connected in the shape of a frame loop in vehicle side view, and the tilt angle sensor for detecting the tilt angle in the left-right direction of the vehicle body is attached to the loop-shaped portion of the vehicle body frame.