Air-Intake Duct Routing for Off-Road Vehicle Air Cleaner
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Solution Overview
Problem
Conventional four-wheeled vehicles for leisure on irregular terrain face issues with mud, sand, and water splashing into the air cleaner, leading to clogging and increased maintenance, as well as increased air flow resistance due to the extended air-intake duct route.
Innovation Solution
The air-intake duct is rerouted to extend forward and upward, with the air cleaner's intake portion opening into the dashboard, reducing the length of the air-intake route and elevating the air cleaner to prevent foreign substances from entering, while the cooling water pipes are positioned above the floor to minimize damage and thermal influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the air-intake duct extends down to the floor face and then forward along the floor face, then the air cleaner can be positioned in the bonnet chamber, but the air-intake route becomes extended and air flow resistance increases
Solution Approach 1:
The air-intake duct is reconfigured to extend upward in the bonnet chamber rather than downward to the floor face. This dimensional change in routing eliminates the extended path along the floor face, directly reducing air flow resistance and improving engine output while maintaining the air cleaner positioning in the bonnet chamber
2Device complexity
If the air cleaner is positioned with the air taking portion opening toward the front side in the bonnet chamber, then the air-intake duct can be connected, but mud, sand, water and foreign substances splash into the air cleaner from the open lower side of the bonnet chamber
Solution Approach 1:
The air taking portion is extracted from the vulnerable front-side opening of the bonnet chamber and repositioned to open into the dashboard interior. This removes the air cleaner intake from direct exposure to splashing mud, sand, and water, significantly reducing clogging frequency and maintenance requirements
3Device complexity
If the air-intake duct extends forward along the floor face to reach the bonnet chamber, then the air cleaner can be positioned in the bonnet chamber, but the air-intake route length increases causing decrease in engine output
Solution Approach 1:
The air-intake duct routing is changed from a horizontal path along the floor face to a vertical path upward in the bonnet chamber. This dimensional change shortens the overall air-intake route length, reducing air flow resistance and thereby improving engine output while maintaining proper connection to the air cleaner
Data Source
AI summary
A four wheeled vehicle capable of preventing mud, sand, water or other foreign substances, which are splashed by front wheels, from coming into an air cleaner with a simple structure and also shortening an air-intake route. The air-intake apparatus includes an air-intake duct connected to an air-intake portion of an engine, and an air cleaner provided in an upstream air-intake portion of the air-intake duct. An air taking portion of the air cleaner opens in the dashboard of the vehicle. The air-intake duct is arranged at a higher position relative to a floor face of the cabin.