Work Vehicle Exhaust Treatment Layout for Visibility
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Solution Overview
Problem
The arrangement of post-treatment apparatuses in work vehicles, such as diesel particulate filters and selective catalytic reduction systems, often results in excessive load on connecting pipes due to vehicle frame twisting during excavation work, and mounting them above the engine compromises rear visibility by heightening the upper surface.
Innovation Solution
The diesel particulate filter and selective catalytic reduction apparatuses are arranged with orthogonal center axis lines to the vehicle's front and back direction, with the selective catalytic reduction apparatus positioned above the diesel particulate filter, and supported by a post-treatment apparatus support bracket, allowing the connecting pipe to extend obliquely downward, thereby reducing the vertical height of the selective catalytic reduction apparatus and maintaining rear visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the post-treatment apparatus is supported by a component connected to the vehicle frame, then the apparatus can be stably mounted, but an excessive load is applied to the connecting pipe which links the post-treatment apparatus and the engine due to vehicle frame twisting during excavation work
Solution Approach 1:
The post-treatment apparatus is extracted from the vehicle frame support system and mounted directly on the engine. This separates the apparatus from the frame twisting issue, eliminating the excessive load on the connecting pipe while maintaining stable mounting through direct engine attachment.
2Strength
If the post-treatment apparatus is mounted on top of the engine, then the problem of excessive load on the connecting pipe is avoided, but the position of the post-treatment apparatus is installed at a higher position and an upper surface of an outer cover which covers the engine and the post-treatment apparatus is heightened, resulting in poor rear visibility
Solution Approach 1:
The apparatus arrangement transitions from a purely vertical stacking configuration to a multi-dimensional layout where the SCR apparatus is positioned laterally adjacent to the DPF apparatus rather than directly above it. This spatial redistribution in the lateral dimension allows the outer cover surface to remain at a lower height, improving rear visibility while maintaining all necessary functional connections.
3Device complexity
If the diesel particulate filter apparatus and selective catalytic reduction apparatus are arranged with their center axis lines orthogonal to the front and back direction of the vehicle, then the apparatus can be compactly arranged, but the selective catalytic reduction apparatus must be positioned above the diesel particulate filter apparatus, which may heighten the upper surface
Solution Approach 1:
The center axis lines of the DPF and SCR apparatus are oriented orthogonally to the front-back direction of the vehicle, creating a compact lateral arrangement. The SCR apparatus is positioned adjacent to rather than directly above the DPF apparatus, concentrating the mass distribution laterally to maintain a lower overall height while achieving compact configuration.
Data Source
AI summary
A work vehicle includes an engine, a diesel particulate filter apparatus, a connecting pipe, and a selective catalytic reduction apparatus. The diesel particulate filter apparatus treats exhaust from the engine. The connecting pipe connects the engine and the diesel particulate filter apparatus. The connecting pipe extends obliquely downward toward the diesel particulate filter apparatus from a connecting position with the engine. The selective catalytic reduction apparatus treats the exhaust from the engine. The selective catalytic reduction apparatus is arranged above the connecting pipe.