Snowmobile Narrow Powertrain Layout for Forward Running Boards
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Solution Overview
Problem
Traditional snowmobile designs limit the forward extension of running boards due to the width of the engine and drivetrain components, affecting rider positioning and maneuverability.
Innovation Solution
The engine and drivetrain are configured within a narrower width than the running boards, allowing the running boards to extend further forward, with an exhaust system routed through the tunnel to minimize width and noise, and an integrated hood/bumper for easy access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the engine and drivetrain are configured with standard width, then the power delivery function is ensured, but the running boards cannot extend further forward, limiting rider positioning and maneuverability
Solution Approach 1:
The engine and drivetrain are reconfigured in a narrower width dimension while extending in length, allowing the running boards to extend further forward. This dimensional transformation enables the running boards to reach forward of the drive axis, improving rider positioning and maneuverability without compromising power delivery capability
2Object-affected harmful factors
If the exhaust system is routed through the tunnel, then exhaust noise is reduced, but the system complexity increases
Solution Approach 1:
The exhaust system is nested within the existing tunnel structure, routing the exhaust path through the tunnel to utilize available space. This nesting approach reduces exhaust noise by directing it away from the rider while minimizing additional system complexity by leveraging the existing tunnel geometry
3Ease of repair
If the hood and bumper are integrated, then accessibility to engine components is improved, but the structural complexity increases
Solution Approach 1:
The hood and bumper are merged into a single integrated assembly that can be opened to provide direct access to the engine and drivetrain components. This consolidation improves maintenance accessibility by allowing the entire front cover to be opened as one unit, while the modular design manages structural complexity
Data Source
AI summary
Embodiments of the present disclosure describe a snowmobile including a chassis, a tunnel, an engine, a drive track and a drivetrain. The tunnel is attached to the chassis and includes running boards located on either side of the tunnel. The engine is attached to the chassis and within an engine bay. The drivetrain is operatively connected to the engine to deliver propulsive power to the drive track, wherein the running boards extend forward alongside at least a portion of the engine bay.