Integrated End Can Assembly for Exhaust Aftertreatment
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Solution Overview
Problem
Engine exhaust aftertreatment systems face challenges in meeting stringent emissions requirements due to limited space in existing engine designs, where traditional end caps and baffles occupy additional space and hinder even exhaust gas flow.
Innovation Solution
An end can assembly for an engine exhaust aftertreatment canister is designed with a low-profile end cap configuration that integrates a pipe and bracket, featuring cutaway portions and apertures to minimize space usage while ensuring a seal and even gas flow, allowing for installation in engines with limited space without redesigning the canister.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional end caps with pipes and brackets are used, then assembly convenience and servicing are improved, but the overall space occupied by the canister increases
Solution Approach 1:
The patent combines the end cap, pipe support bracket, and pipe mounting functions into a single integrated end cap assembly. The bracket is formed as part of the end cap structure itself, eliminating the need for separate components while maintaining assembly convenience and reducing overall canister length.
Solution Approach 2:
The end cap serves multiple functions simultaneously: it seals the canister end, provides structural support for the pipe through an integrated bracket, and maintains the required spacing within the canister. This multi-functional design reduces the number of separate components needed.
2Reliability
If baffles are added to improve exhaust gas flow distribution, then aftertreatment device performance is improved, but space within the canister is reduced
Solution Approach 1:
Instead of using a full baffle structure throughout the canister, the patent implements a localized flow distribution approach where the end cap bracket geometry itself creates flow guidance. The bracket design provides local flow management at the inlet region without requiring extensive baffle structures throughout the entire canister volume.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An end can assembly (14) for an engine exhaust aftertreatment canister (10) comprises an end can (30) formed from an end plate (36) and a wall (38) extending from a periphery of the end plate, the end plate and the wall having a first cutaway portion (40) formed therein. A pipe (32) is provided in the first cutaway portion and attached to the end can around the first cutaway portion to form a seal with the end can, the pipe having at least one opening (48) provided therein which opens into an interior of the end can assembly. A bracket (34), comprising a plate (42) and a shoulder (44) extending at an angle from the plate, is attached to the end plate (36) and to the wall (38), the shoulder (44) having a second cutaway portion (46) formed therein which is shaped to receive the pipe (32) whereby the shoulder abuts the pipe and provides structural support to the pipe and end can.