Lateral Breather Chamber for Compact Snow Vehicle Engine
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Solution Overview
Problem
Existing breather devices for 4-cycle engines in snow vehicles either increase the engine's height or require additional parts, leading to larger engine sizes and potential freezing of moisture due to wind exposure.
Innovation Solution
A breather device with a chamber integrated on the lateral side of the engine, formed by coupling the cylinder head and block, which reduces part count, streamlines assembly, and prevents oil leakage, while being warmed by the engine's heat to avoid freezing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the breather chamber is provided in an upper part within the cylinder head cover, then the breather function is achieved, but the total height of the engine becomes high
Solution Approach 1:
The breather chamber is relocated from the vertical upper part of the cylinder head cover to the lateral side of the engine. This spatial repositioning changes the dimension in which the breather chamber occupies space, allowing the engine to maintain its compact height while still providing sufficient breather chamber volume on the side profile.
2Reliability
If a separate breather tank and hose are installed, then the breather function is achieved, but the number of parts increases and installation space is required
Solution Approach 1:
The breather chamber is integrated directly into the engine structure by forming it as a space within the cylinder head cover, eliminating the need for separate breather tanks and hoses. This merging of functions reduces the number of parts and simplifies the overall breather system while maintaining effective blow-by gas venting and oil separation capabilities.
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 achieves engine downsizing, ensures sufficient breather chamber volume, and enhances reliability by preventing oil leakage and moisture freezing, thus improving the breather device's performance and durability.
Implementation Method 1
the breather chamber or the hose are cooled down by the wind during traveling... the breather chamber may be provided above the magnet unit... the upper part of the breather chamber may be partitioned into two chambers
Data Source
AI summary
A breather device provided in a 4-cycle engine which is configured to be mounted on a front part of a vehicle body of a snow vehicle, the 4-cycle engine including a crankcase, a crankshaft rotatably supported on the crankcase and provided in a state substantially parallel to the snow vehicle width direction, and a magnet unit connected to one end of the crankshaft, wherein the breather device includes a breather chamber integrally provided on a lateral side of the 4-cycle engine at the same side of the magnet unit and the breather chamber is disposed above the magnet unit in a side view.