Straddle-Type Vehicle Fuel Hose Clamp Layout
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Solution Overview
Problem
Straddle-type vehicles face challenges in preventing position changes of fuel hoses made from low rigidity materials, such as rubber, especially when the distance between the fuel discharge portion on the fuel tank and the vehicle body frame is long, leading to instability and potential interference with other components.
Innovation Solution
A straddle-type vehicle design featuring a fuel hose with a clamp positioned laterally from the fuel tank, secured by a clamp on the storing box, which effectively restricts movement and maintains stability without compromising the volume or shape of the fuel tank or storing box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fuel hose made from low rigidity material such as rubber is used, then cost is reduced, but position stability of the fuel hose deteriorates when the distance between the fuel discharge portion and the vehicle body frame is long
Solution Approach 1:
The fuel hose support structure is segmented into multiple clamps positioned at different locations. One clamp is provided on the vehicle body frame, and another clamp is provided on the storing box, creating multiple support points that stabilize the fuel hose without requiring high rigidity material
Solution Approach 2:
The storing box serves as an intermediary structure to provide an additional clamp position. By utilizing the storing box as a mediator, the fuel hose gains extra support without directly connecting to the vehicle body frame, enabling the use of flexible rubber material while maintaining position stability
2Stability of the object's composition
If a clamp is provided on the vehicle body frame to clamp the fuel hose, then position change of the fuel hose is prevented, but the clamp may interfere with the fuel tank or reduce the volume of the storing box
Solution Approach 1:
The clamping function is segmented between two separate locations: one clamp on the vehicle body frame and another clamp on the storing box. This segmentation allows each clamp to be positioned optimally without interfering with the fuel tank or reducing storing box volume
Solution Approach 2:
The clamp on the storing box utilizes the lateral dimension (width direction) by positioning the storing box laterally from the fuel tank. This dimensional arrangement allows the clamp to secure the fuel hose without interfering with the fuel tank space or reducing the storing box volume
3Volume of stationary object
If the clamp is positioned laterally from the fuel tank, then the volume and shape of the fuel tank and storing box are maintained, but the distance between the clamp and the fuel discharge portion increases
Solution Approach 1:
The fuel hose support is segmented into two clamps at different positions. The first clamp on the vehicle body frame provides support near the fuel discharge portion, while the second clamp on the storing box provides additional support laterally, together managing the hose without excessive length in any single segment
Solution Approach 2:
Different regions of the fuel hose are provided with different levels of support. The area near the fuel discharge portion is supported by the first clamp, while the lateral region is supported by the second clamp on the storing box, optimizing both volume maintenance and distance control locally
Data Source
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AI summary
A fuel hose (49) has a rear portion extending from a fuel discharge portion (41) of a fuel tank (40) toward a rear frame (24). A storing box (50) includes a clamp (51f) located laterally from the fuel tank (40) and clamping the hose rear portion of the fuel hose (49) at a position located upward away from the rear frame (24). This structure can prevent position change of the fuel hose (49) even when the distance between the fuel discharge portion (41) provided on the upper surface of the fuel tank (40) and a vehicle body frame is long.