Tractor Hood Duct Design for Cooling Airflow Management
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Solution Overview
Problem
Existing vehicle cooling systems on slow-moving vehicles like agricultural tractors face inefficiencies due to recirculation of hot air, which increases fan power requirements and poses thermal management challenges, especially with the addition of hardware needed for Tier IV exhaust regulations.
Innovation Solution
A vehicle engine enclosure design that uses the tractor frame and hood to form a duct system with seals and vents to vertically direct hot air away from the cooling system intakes, minimizing recirculation and optimizing airflow, thereby reducing fan power needs and managing thermal loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hot air is recirculated back into the cooling system intake, then the cooling system can reuse the air, but the cooling efficiency decreases and fan power requirements increase
Solution Approach 1:
The patent extracts hot air from the engine compartment using exhaust气流, separating it from the cooling air intake path. This prevents recirculation of hot air back into the cooling system, maintaining cooling efficiency while reducing fan power requirements.
Solution Approach 2:
The patent introduces exhaust气流 as an intermediary mechanism to actively remove hot air from the engine compartment. This mediator creates a controlled airflow path that prevents hot air recirculation without requiring additional fan power.
2Object-affected harmful factors
If multiple cooling units and motor-driven fans are used to blow air upward, then hot air recirculation is prevented, but device complexity increases
Solution Approach 1:
The patent utilizes the vehicle's existing exhaust system to perform the function of removing hot air. The exhaust气流 automatically creates negative pressure that draws hot air out of the engine compartment, eliminating the need for dedicated cooling fans or complex ducting systems.
Solution Approach 2:
The patent makes the exhaust system multi-functional by having it serve both its primary function of emitting exhaust gases and the secondary function of removing hot air from the engine compartment. This eliminates the need for separate cooling air movement devices.
3Object-affected harmful factors
If ducts are installed to direct airflow, then hot air management is improved, but space under the hood is reduced
Solution Approach 1:
The patent extracts hot air removal functionality from the traditional ducting system and integrates it into the exhaust system. This eliminates the need for separate air directing ducts, freeing up space under the hood while maintaining effective thermal management.
Solution Approach 2:
The patent merges the hot air removal function with the exhaust system. By combining these two functions into a single system, the patent eliminates the need for separate ducting structures, thereby preserving space under the hood.
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 design enhances cooling system efficiency by reducing recirculation and thermal stress, freeing up space under the hood and ensuring consistent airflow to prevent damage from excessive heat, while adhering to regulatory requirements.
Implementation Method 1
the exhaust stream does double duty by not only cooling the under hood components but also creating negative pressure that draws the hot air out of the engine compartment
Implementation Method 2
A cooling system is mounted on the frame and has a housing which surrounds cooling components
Data Source
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AI summary
A vehicle engine enclosure (10), comprising an engine (30) mounted on a tractor frame (13); a cooling system (32) mounted on the frame (13), the cooling system (32) having a housing (38) surrounding cooling components; and a hood (12), the hood (12) being mounted on the frame (13) and enclosing the engine (30) and the cooling system (32), the hood (12) comprising a top panel (14) and left and right hood side panels (14, 16), the top panel (14) having a vent (28) therein, the hood (12), the frame (13), the engine (30) and the cooling system housing (38) cooperating to form a duct.