PCV Valve Mount Recess for Low-Temperature Freezing
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Solution Overview
Problem
Existing PCV valve mounting structures expose intermediate portions of the valve to atmospheric air, leading to potential freezing of water content in blow-by gases, especially at low temperatures.
Innovation Solution
A mounting structure that incorporates a mount recess on the joint surfaces of the cylinder head and intake manifold, allowing the PCV valve to be fitted within these recesses, thereby protecting it from atmospheric air and preventing water content from freezing, with optional features like a resilient member for enhanced heat transfer and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the PCV valve is mounted between the cylinder head cover and surge tank with exposed intermediate portion, then the assembly structure is simple, but the water content in blow-by gas may freeze at low temperatures
Solution Approach 1:
The PCV valve is nested within the intake manifold by fitting its intermediate portion into a mount recess formed in the intake manifold. This nesting arrangement protects the PCV valve from atmospheric air while maintaining a compact assembly, resolving the contradiction between simple mounting structure and operational reliability at low temperatures.
2Ease of manufacture
If the PCV valve intermediate portion is exposed to atmospheric air, then the heat transfer from engine is reduced, but the manufacturing and assembly process is simpler
Solution Approach 1:
The mount recess in the intake manifold is designed to accommodate the PCV valve's intermediate portion, merging the PCV valve assembly with the intake manifold structure. This integration provides thermal protection by eliminating exposure to atmospheric air while maintaining ease of manufacture through a unified structural approach.
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
Effectively prevents water content in blow-by gases from freezing within the PCV valve by accommodating it within the engine's components, ensuring reliable operation and efficient assembly, while also reducing manufacturing costs through the use of resin materials.
Implementation Method 1
a resilient member pressing the PCV valve against the cylinder head
Data Source
AI summary
A mounting structure for mounting a PCV valve includes a mount recess formed in at least one of joint surfaces of a cylinder head and an intake manifold, so that at least a part of the PCV valve can be fitted into the mount recess.