Crankcase Vent Nozzle Aerodynamic Shape Ice Prevention
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Solution Overview
Problem
Existing crankcase ventilation systems face challenges in preventing ice buildup at low ambient temperatures, which can damage engine components and affect performance, despite additional heating or insulation measures that increase costs and complexity.
Innovation Solution
A nozzle with an aerodynamic airfoil shape is integrated into the air inlet adapter, creating turbulence that disperses water and prevents ice formation by having a leading edge portion extending radially into the flow path to a lesser extent than the trailing edge portion, ensuring water does not freeze within the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating systems or insulation are added to prevent freezing, then ice build-up is reduced, but system cost and complexity increase significantly
Solution Approach 1:
The invention extracts the freezing prevention function from complex external heating systems and insulation components, and integrates it into the simple aerodynamic shape of the PCV/CCV nozzle itself. The airfoil portion's geometry naturally prevents ice build-up without requiring separate heating elements or insulating materials.
Solution Approach 2:
The nozzle's aerodynamic design serves its own freezing prevention needs through its geometric configuration. The airfoil shape creates specific flow patterns that prevent ice accumulation, allowing the component to protect itself without external assistance from heating systems or insulation.
2Reliability
If heating systems are added to prevent freezing, then ice build-up is reduced, but manufacturing cost increases
Solution Approach 1:
The invention removes the need for expensive heating systems and insulation materials by incorporating freezing prevention directly into the nozzle's aerodynamic geometry. This eliminates additional manufacturing costs associated with heating elements, thermostats, and insulating materials.
Solution Approach 2:
The invention changes the geometric parameters of the nozzle (airfoil shape, leading edge radius, trailing edge configuration) to achieve freezing prevention. By optimizing these dimensional parameters, the system prevents ice build-up through flow dynamics rather than thermal management, reducing manufacturing complexity and cost.
3Object-affected harmful factors
If ice build-up occurs at the outlet, then engine components may be damaged or performance affected, but simple aerodynamic shaping can prevent this
Solution Approach 1:
The invention employs curved aerodynamic surfaces throughout the nozzle geometry, including a rounded leading edge with specific radius and a contoured airfoil portion. These curved surfaces create favorable flow patterns that prevent ice accumulation, protecting downstream components while adding minimal geometric complexity.
Solution Approach 2:
The airfoil portion of the nozzle features asymmetric geometry with different curvature radii at the leading and trailing edges. This asymmetric shape optimizes the flow characteristics to prevent ice build-up on the outlet side, addressing the specific problem of ice formation while maintaining relatively simple manufacturing.
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
The nozzle effectively reduces or eliminates ice formation in low ambient temperatures, preventing damage to engine components and maintaining engine performance without adding significant cost or complexity to the system.
Implementation Method 1
A nozzle with an aerodynamic airfoil shape is integrated into the air inlet adapter, creating turbulence that disperses water and prevents ice formation
Data Source
AI summary
A crankcase ventilation system is provided. The crankcase ventilation system is fluidly coupled between an engine block assembly and an axially extending air inlet adapter. A crankcase vent nozzle is provided as one aspect of the system and extends into the air inlet adapter. The crankcase vent nozzle has a leading edge portion and a trailing edge portion extending radially into an axially extending flow path in the air inlet adapter. The trailing edge portion extending further into the flow path than the leading edge portion.