Working Vehicle Engine Room Thermal Shielding and Structural Bridging
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Solution Overview
Problem
Working vehicles with diesel engines face challenges in managing heat from the engine and exhaust gas treatment devices, leading to elevated temperatures in the engine room, which affects the comfort of the operator and limits the space for fuel tanks and other components.
Innovation Solution
A structural arrangement featuring a hood with a fan shroud, cooling fan, and heat shield plates that bridge beam frames to create a rigid engine room frame, shielding the driver's seat from heat and providing a large space for the exhaust gas purification device while maintaining a heat balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diesel engine and exhaust gas treating device are disposed in the engine room, then the exhaust gas purification function is achieved, but the temperature in the engine room becomes excessively high
Solution Approach 1:
The engine room is divided into a high-temperature region (housing the diesel engine and exhaust gas treating device) and a low-temperature region (driver's seat area) using heat shield plates as thermal barriers. This segmentation allows the exhaust gas purification system to operate at high temperatures while protecting the driver's area from excessive heat.
Solution Approach 2:
Heat shield plates are introduced as intermediary components between the high-temperature exhaust gas treating device and the driver's seat area. These shield plates act as thermal mediators that block heat transfer while allowing the exhaust gas purification system to function effectively.
2Quantity of substance
If the fuel tank capacity is increased, then the fuel storage is sufficient, but the shape hinders the operator entering and exiting the tractor
Solution Approach 1:
The fuel tank is positioned in the rear portion of the vehicle body rather than expanding laterally near the driver's area. This spatial repositioning in another dimension (rearward direction) allows maximum fuel capacity while maintaining clear access paths for the operator to enter and exit the tractor.
3Volume of moving object
If various parts are packed in the limited installation space, then the vehicle compactness is improved, but the space for fuel tank and operator access is reduced
Solution Approach 1:
The vehicle interior space is segmented into distinct functional zones: the engine room at the front housing powertrain components, the driver's cabin in the middle with clear access paths, and the rear portion for fuel tank storage. This segmentation allows compact packaging of components while preserving operator accessibility.
4Temperature
If the cooling fan is disposed on the front surface side of the engine, then the cooling efficiency is improved, but the space arrangement becomes more complex
Solution Approach 1:
The front surface area of the engine is utilized for multiple purposes: housing the cooling fan for engine cooling, providing mounting positions for the fan shroud and beam frames for structural support, and maintaining clear airflow paths. This multi-functional use of space improves cooling efficiency without proportionally increasing overall 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 shields the driver from engine heat, allows for a more efficient cooling system, and maximizes space for the exhaust gas purification device, enhancing operator comfort and vehicle performance.
Implementation Method 1
a cooling fan configured to cool the engine, wherein the cooling fan is disposed on a front surface side of the engine
Implementation Method 2
A hood shield plate that covers a rear side of the engine is disposed on a rear surface of the hood
Data Source
AI summary
A working vehicle includes an engine mounted in a front portion of a travelling vehicle, a post-processing device that is disposed above the engine and purifies exhaust gas from the engine, and a cooling fan for cooling the engine. The cooling fan is disposed on a front surface side of the engine. A fan shroud that covers the cooling fan is fixed to the travelling vehicle. A hood shield plate that covers a rear side of the engine is disposed on a rear surface of a hood. The hood shield plate is fixed to the travelling vehicle. A pair of left and right beam frames each bridge between respective upper portions of the fan shroud and the hood shield plate.