Exhaust Connection Pipe With Spherical Joints

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Solution Overview

Problem

The relative positional and postural displacement between diesel particulate filter devices and selective catalytic reduction devices in exhaust treatment units makes it difficult to maintain a constant connection using a second connection pipe, hindering reliable attachment and maintenance.

Innovation Solution

Incorporating a connection pipe with multiple spherical joints, specifically a first, second, and third spherical joint configuration, allows for flexible positioning and alignment between the diesel particulate filter device and the selective catalytic reduction device, ensuring reliable connection despite variations in relative position and posture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the exhaust treatment unit uses a rigid connection pipe to connect the diesel particulate filter device and the selective catalytic reduction device, then the connection is stable and reliable, but the relative positional and postural displacement between the two devices causes connection failure

Engineering Contradiction:

Improveconnection reliabilityVSAvoidadaptability to positional displacement

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The connection pipe is transformed from a rigid structure to a dynamic structure by incorporating spherical joints at multiple locations. These joints enable the pipe to adapt its configuration dynamically, allowing connection despite relative positional and postural displacements between the diesel particulate filter device and the selective catalytic reduction device.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The connection pipe's physical parameters (shape, orientation, position) are made changeable through the spherical joints. This allows the pipe to adjust its geometric parameters to accommodate variations in the relative positioning of the connected devices, resolving the contradiction between connection stability and adaptability to displacement.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the connection pipe is made flexible to accommodate positional displacement, then adaptability improves, but connection reliability and stability deteriorate

Engineering Contradiction:

Improveadaptability to positional displacementVSAvoidconnection stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The connection pipe incorporates spherical joints that provide dynamic adaptability while maintaining connection integrity. The joints allow controlled movement and adjustment, enabling the pipe to adapt to positional displacements without compromising the overall stability and reliability of the connection between the two exhaust treatment devices.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9334786B2Exhaust treatment unit

Publication Date: 2016.05.10 KOMATSU LTD

AI summary

An exhaust treatment unit treats an exhaust gas from an engine of a work vehicle. The exhaust treatment unit includes a diesel particulate filter device, a selective catalytic reduction device, and a connection pipe. The diesel particulate filter device treats the exhaust gas. The selective catalytic reduction device treats the exhaust gas. The connection pipe connects the diesel particulate filter device and the selective catalytic reduction device. The connection pipe includes a plurality of spherical joints, a first pipe part on a first end, and a second pipe part on a second end. The plurality of spherical joints include a first spherical joint mounted between the first pipe part and the diesel particulate filter device, a second spherical joint mounted between the second pipe part and the selective catalytic reduction device, and a third spherical joint mounted between the first and second pipe parts.