Work Vehicle Partition Wall Cooling Design
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Solution Overview
Problem
The existing configuration of work vehicles, such as motor graders, requires a complex structure with a discharge hose across the engine and heat exchanger compartments to cool the engine, which complicates the partition plate arrangement.
Innovation Solution
A work vehicle design with an exterior cover and partition wall that inclines at specific angles to create a simple structure for cooling, using an air blower to generate a pressure difference for ventilation between the engine and cooling compartments, while protecting against rain and foreign substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a discharge hose is provided across the engine compartment and the heat exchanger compartment to cool the engine, then the engine compartment can be cooled, but the structure around the partition plate becomes complicated
Solution Approach 1:
The patent removes the discharge hose from the system by extracting its cooling function and replacing it with a direct opening in the partition plate. The first wall portion includes an opening that allows air to flow directly from the engine compartment to the heat exchanger compartment without requiring a separate hose, thereby simplifying the partition plate structure while maintaining cooling effectiveness
Solution Approach 2:
The patent merges the partition plate structure with the air discharge function by integrating the opening directly into the first wall portion of the partition plate. This combines the structural division function with the cooling airflow function, eliminating the need for a separate discharge hose and reducing overall system complexity
2Temperature
If the partition wall is designed with inclined wall portions to improve air flow, then the cooling ability is improved, but the height of the second wall portion protruding toward the cooling compartment increases
Solution Approach 1:
The patent optimizes the geometric parameters of the inclined wall portions, specifically controlling the angle between the first and second wall portions to be 20 degrees or less. This parameter adjustment allows the second wall portion to maintain its air flow guidance function while limiting its protrusion height into the cooling compartment, thus balancing cooling efficiency with space constraints
3Speed
If the air intake port is positioned to face the second wall portion, then air flow velocity is increased, but the risk of rainwater or foreign substances entering the engine compartment increases
Solution Approach 1:
The patent employs asymmetric design in the inclined wall portions where the first wall portion has a different inclination angle than the second wall portion. The first wall portion is inclined at a greater angle to guide air flow efficiently, while the second wall portion is inclined at a smaller angle to act as a protective barrier. This asymmetric configuration allows the air intake port to face the second wall portion for high velocity air intake while the angled second wall portion prevents rainwater and foreign substances from entering the engine compartment
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 design efficiently cools the engine compartment, improves heat exchange efficiency, and prevents overheating of devices, while maintaining a simple structure and protecting against external contaminants.
Implementation Method 1
the flow of air generated within the cooling compartment produces a pressure difference between the inside of the engine compartment and the inside of the cooling compartment, thereby causing the air within the engine compartment to flow through the opening into the cooling compartment
Implementation Method 2
the flow velocity of the air flowing along the first wall portion can be increased, and the ability to suck out the air from the engine compartment can be further improved
Implementation Method 3
a cooling unit disposed within the cooling compartment on the partition wall side with respect to the air blower
Data Source
AI summary
A work vehicle capable of cooling an engine compartment in a simple structure is provided. A partition wall partitions an internal space of an exterior cover into an engine compartment housing the engine and a cooling compartment housing the air blower. The partition wall includes a first wall portion extending at a relatively large inclination with respect to a direction in which an upper side plate of the exterior cover located on the cooling compartment side with respect to the partition wall extends, and a second wall portion extending at a relatively small inclination. An upper opening portion as an air intake port connecting an external space and the internal space of the exterior cover is provided in the upper side plate so as to be located to face the second wall portion. The first wall portion is provided with an opening connecting the engine compartment and the cooling compartment.