Dozer Exhaust After-Treatment Layout for Visibility and Heat Control
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Solution Overview
Problem
The installation of an engine room in front of the cabin in dozers obstructs the driver's field of view, and the heat from the exhaust gas after-treatment device can deteriorate engine parts due to overlapping configurations.
Innovation Solution
A dozer design with an engine room configuration where the exhaust gas after-treatment device is located above the engine, separated by a dividing member, and equipped with cooling devices to prevent heat transfer, allowing for non-overlapping installation and effective cooling of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the engine room is located in front of the cabin, then the engine can be installed in a convenient position, but the driver's field of view is obstructed
Solution Approach 1:
The exhaust gas after-treatment device is repositioned from a horizontal arrangement (side-by-side with the engine) to a vertical arrangement (above the engine), utilizing the third dimension (height) to resolve the spatial conflict between engine installation requirements and driver visibility requirements
2Volume of stationary object
If the exhaust gas after-treatment device is installed overlapping the engine, then space is saved in the engine room, but heat from the after-treatment device deteriorates engine parts
Solution Approach 1:
The exhaust gas after-treatment device is positioned vertically above the engine rather than horizontally overlapping it, utilizing vertical space to avoid horizontal overlap. This dimensional change allows both components to coexist without harmful thermal interaction while maintaining efficient space utilization
Solution Approach 2:
A cooling device is introduced as an intermediary between the exhaust gas after-treatment device and the engine. This cooling device manages the thermal field, preventing harmful heat transfer from the after-treatment device to the engine while allowing both components to be positioned in close proximity
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 reduces obstructions to the driver's view and prevents engine part deterioration by maintaining the exhaust gas after-treatment device and engine at separate, non-overlapping positions, enhancing safety and performance.
Implementation Method 1
heat from an exhaust gas after-treatment device installed in the engine room is transferred to the engine and deteriorates engine parts
Data Source
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AI summary
A dozer including a cabin includes: an engine room located in front of the cabin, where an engine is internally disposed; and an exhaust gas after-treatment device located above the engine, for purifying exhaust gases emitted from the engine.