Vertical DPF-SCR Layout for Compact Construction Machine Exhaust
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Solution Overview
Problem
Existing construction machines with exhaust gas treatment apparatuses occupy significant space around the engine, compromising maintainability and efficient use of space.
Innovation Solution
The exhaust gas treatment apparatus is configured with a first and second treatment device oriented vertically, arranged side by side in a direction perpendicular to the vertical direction, allowing compact placement within the hood, and the exhaust gas flow direction is optimized from lower to upper sections of each device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the exhaust gas treatment apparatus is arranged in a lying position with longitudinal direction in the front-back direction, then the treatment units can be installed in the engine chamber, but relatively wide dead space is formed between the connecting wall and the treatment units, causing the apparatus to occupy space around the engine and reducing maintainability
Solution Approach 1:
The patent changes the arrangement orientation of the exhaust gas treatment apparatus from horizontal (front-back direction) to vertical arrangement. The treatment units are positioned with their longitudinal directions extending in the vertical direction, utilizing the vertical space within the engine chamber rather than horizontal space, thereby reducing dead space and improving maintainability without compromising treatment capacity
2Volume of moving object
If the exhaust gas treatment apparatus is arranged at a tilt perpendicular to the vertical direction, then it can be installed in the engine chamber, but it occupies space in the surroundings of the engine, reducing maintainability
Solution Approach 1:
The patent transitions from tilted or horizontal arrangement to a vertical arrangement where the longitudinal directions of the treatment units extend in the vertical direction. This dimensional change allows the apparatus to fit within the engine chamber's vertical space while clearing the surrounding engine area, thereby improving maintainability
Solution Approach 2:
The patent combines the first and second treatment units in a vertical arrangement within the engine chamber, positioning them such that they utilize the available vertical space efficiently. This merging of treatment functions into a compact vertical configuration reduces the overall footprint and improves access to the engine
3Volume of moving object
If the exhaust gas treatment apparatus occupies space around the engine, then it can be installed in the engine chamber, but the maintainability of the engine deteriorates
Solution Approach 1:
The patent arranges the treatment units with their longitudinal directions in the vertical direction, positioning them to utilize vertical space within the engine chamber. This vertical orientation clears the horizontal space around the engine, improving accessibility and ease of operation for engine maintenance while maintaining effective use of the engine chamber volume
Data Source
AI summary
A pivoting work vehicle includes an engine, an exhaust gas treatment apparatus, and a hood. The exhaust gas treatment apparatus is configured to treat exhaust gas from the engine. The hood is configured to cover the engine and the exhaust gas treatment apparatus. The exhaust gas treatment apparatus includes a DPF device and an SCR device. The exhaust gas is treated first by the DPF device, then by the SCR device. The DPF device and SCR device are each disposed so that the lengthwise directions thereof lie along the vertical direction. The DPF device and SCR device are arranged side-by-side in a direction orthogonal to the vertical direction.