Snowmobile Fuel Tank Structural Frame Integration
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Solution Overview
Problem
Snowmobiles face challenges in achieving reduced weight for improved fuel efficiency and handling without compromising stability, and require easy assembly and disassembly for maintenance and repairs.
Innovation Solution
The design incorporates a frame with a longitudinal tunnel, engine cradle, front suspension module, and a fuel tank that forms a structural connection to enhance torsional and structural rigidity, allowing for weight reduction while maintaining stability, and features a removable fuel tank for ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the snowmobile structure uses traditional separate components for frame and fuel tank, then assembly and maintenance are complex, but weight reduction and structural integration are limited
Solution Approach 1:
The fuel tank is integrated with the frame to form a unified structure where the fuel tank serves both as a fuel container and as a structural component that transmits loads between the tunnel and forward support, eliminating the need for separate mounting brackets and reducing overall complexity
2Strength
If the fuel tank is permanently integrated into the frame structure, then structural rigidity is enhanced, but maintenance and repair accessibility are reduced
Solution Approach 1:
The fuel tank is designed with a removable cap that provides access to the fuel inlet, allowing maintenance personnel to service the fuel system without disassembling the entire integrated structure, thus maintaining structural rigidity while enabling easy access for repairs
3Stability of the object's composition
If the snowmobile uses heavier traditional frame structures, then stability is improved, but fuel efficiency and handling are compromised
Solution Approach 1:
The fuel tank is designed to serve multiple functions: it stores fuel, provides structural support by transmitting loads between the tunnel and forward support, and contributes to the overall rigidity of the snowmobile frame, thereby maintaining stability while reducing weight compared to traditional single-function frame structures
Data Source
AI summary
A snowmobile having a frame, a seat, at least one ski, a front suspension assembly connected to the frame and the at least one ski, a rear suspension assembly connected to the frame and to an endless track and an engine operatively connected to the frame and the endless track. The frame includes a longitudinal tunnel, an engine cradle connected thereto and extending forwardly therefrom. A front suspension module connected to the engine cradle and extending forwardly therefrom, is connected to the front suspension assembly. A forward support, connected either to the front suspension module or the engine cradle, extends rearwardly and upwardly therefrom. A fuel tank connected to the tunnel extends forwardly and upwardly from the tunnel to the forward support so as to form a structural connection between the tunnel and the forward support for transmitting loads therebetween. Frames for the snowmobile are also disclosed.