Off-Road Intake Box Layout to Block Dust and Water Ingress
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Solution Overview
Problem
Dust and water can inadvertently enter intake conduits of off-road vehicles, potentially damaging internal combustion engines and continuously variable transmissions.
Innovation Solution
An intake box with a design that includes an internal space, an opening with a filter, and an introduction duct where the inlet is positioned higher than the bottom wall, allowing dust and water to accumulate on the bottom wall and preventing their entry into the introduction duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dust or water passes through the filter, then the filter fails to prevent contamination, but the intake conduit becomes damaged
Solution Approach 1:
The patent divides the intake system into separate functional zones: a filtration zone with the filter, and an intake zone with the introduction duct inlet positioned above the bottom wall. This segmentation allows the filter to handle filtration while the elevated inlet prevents direct contact with accumulated contaminants, resolving the contradiction between filter effectiveness and contamination prevention.
Solution Approach 2:
The bottom wall of the intake box serves as an intermediary barrier between the filtered air space and the external environment. By positioning the introduction duct inlet above this barrier, the system creates a protected intermediate zone where contaminants can accumulate without reaching the intake conduit, thus protecting against harm while maintaining reliable filtration.
2Object-affected harmful factors
If the introduction duct inlet is positioned at the bottom wall level, then dust and water can enter the intake conduit, but positioning it higher prevents contamination
Solution Approach 1:
The patent applies local quality by positioning the introduction duct inlet at a specific height above the bottom wall rather than uniformly across the entire intake box. This localized positioning provides contamination protection exactly where needed (at the intake point) without requiring complex structural modifications throughout the entire device, thus preventing harm while minimizing added complexity.
3Device complexity
If a simple filter is used, then the configuration remains simple, but dust and water can still enter the intake conduit
Solution Approach 1:
The patent adds a vertical dimension to the contamination prevention strategy by positioning the introduction duct inlet above the bottom wall level. This dimensional change transforms a simple horizontal filtration system into a vertically stratified system where the height difference creates a natural barrier against contaminants, enhancing reliability without significantly increasing horizontal complexity.
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 effectively prevents dust and water from entering the intake conduit, maintaining smooth airflow and protecting the engine and transmission components.
Implementation Method 1
the dust or water accumulates on the bottom wall of the intake box under the dust or water's own weight
Data Source
AI summary
An off-road vehicle includes an intake box, an introduction duct, and an intake duct. The intake box includes an internal space, an opening, and a bottom wall. The opening is provided with a filter, and the internal space is open to an outside of the off-road vehicle through the opening. The bottom wall defines a lower boundary of a part of the internal space. Through the introduction duct, the internal space of the intake box communicates with an outside of the intake box. The introduction duct protrudes upward and toward the internal space from the bottom wall of the intake box. The introduction duct includes an inlet provided at a position higher than the bottom wall in the internal space of the intake box. The intake duct is provided at the outside of the intake box and connected to the introduction duct.