Snowmobile Engine Forward Inclination for Stability

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Solution Overview

Problem

Conventional snowmobile designs face challenges in reducing the distance between the engine's gravity center and the vehicle's gravity center due to the placement of components like the oil filter and starter motor, which affects driving stability, maintenance ease, and overall vehicle balance.

Innovation Solution

The snowmobile design inclines the engine's cylinder axis forward, positions the steering shaft on the cylinder head, and places the oil filter and starter motor in optimized locations to reduce the gravity center distance, enhance maintenance access, and improve stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the engine is inclined rearward to align gravity centers, then driving stability is improved, but the distance between the oil filter and front of vehicle increases, making maintenance difficult

Engineering Contradiction:

Improvedriving stabilityVSAvoidmaintenance ease

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent inverts the conventional engine inclination approach. Instead of inclining the engine rearward (which pushes the oil filter to the front), the engine is inclined forward. This inversion allows the oil filter to be positioned at the rear of the engine, making it accessible from the rear side of the vehicle while still achieving gravity center alignment for stability.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the spatial dimension of component arrangement by utilizing the rear side of the vehicle for oil filter placement. This dimensional reorganization allows the oil filter to be positioned in a location that is both mechanically optimal (near the engine) and accessible for maintenance (rear side of vehicle), resolving the contradiction between stability and maintenance ease.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If the engine is inclined rearward to align gravity centers, then driving stability is improved, but the overall vehicle length increases

Engineering Contradiction:

Improvedriving stabilityVSAvoidvehicle length

Core Design Contradiction:

Stability of the object's compositionVSLength of moving object

Solution Approach 1:

The patent inverts the engine inclination direction from rearward to forward. This inversion repositions the engine and associated components (oil filter, starter motor) to utilize space more efficiently, reducing the overall vehicle length while maintaining gravity center alignment for stability.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent changes the inclination angle parameter of the engine from a rearward inclination to a forward inclination. This parameter change optimizes the spatial arrangement of components, allowing for a more compact vehicle design that maintains stability without increasing length.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If the oil filter is positioned at the front of the engine, then engine access is improved, but the distance from vehicle front increases, affecting gravity center alignment

Engineering Contradiction:

Improvecomponent accessibilityVSAvoidgravity center alignment

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent inverts the conventional oil filter positioning. Instead of placing it at the front of the engine (which requires the engine to be positioned far forward), the oil filter is placed at the rear of the engine. This inversion allows the engine to be positioned more centrally, improving gravity center alignment while the oil filter remains accessible from the rear side of the vehicle.

Inventive Principle:

Principle #13The other way round (Inversion)

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 significantly improves driving stability by aligning the engine and vehicle gravity centers, facilitates easier oil filter replacement, and simplifies starter motor maintenance, while maintaining a compact design.

Implementation Method 1

the engine is mounted by inclining a cylinder axis thereof forward... a distance between a gravity center position of the engine and a gravity center position of the vehicle body can be reduced

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS8408348B2Snowmobile and engine for snowmobile

Publication Date: 2013.04.02 SUZUKI MOTOR CORP

AI summary

A snowmobile having improved drive stability of the vehicle body during steering includes a pair of left and right skis on a front side of the vehicle body, a steering shaft disposed on a front of a saddle type seat for steering the skis, an engine mounted in a cowling that covers the front side of the vehicle body, and a crawler disposed on a rear side of the vehicle body for driving the snowmobile. The engine is mounted by inclining a cylinder axis thereof forward, and the steering shaft is disposed on the front of a cylinder head of the engine.