Poka-yoke mounting system for an exhaust treatment device

摘要

An exhaust treatment system includes an exhaust treatment device having a stepped outer diameter. First and second clamps each include a stepped inner diameter such that the clamps engage the exhaust treatment device and other portions of the exhaust treatment system when the exhaust treatment device is properly oriented. The exhaust treatment device interferes with one of the clamps to preclude coupling the exhaust treatment device to an adjacent portion of the exhaust treatment system when an attempt is made to install the exhaust treatment device in a reversed improper orientation. A consistent exhaust flow direction through an exhaust treatment device such as a diesel particulate filter may be maintained through use of the inventive system.

主权项

1. An exhaust treatment system including first and second spaced apart portions in receipt of exhaust emitted from an internal combustion engine, the exhaust treatment system comprising:
an exhaust treatment device including a housing having a first outer diameter at an open upstream end of the exhaust treatment device, the housing having a second outer diameter different than the first diameter at an open second end of the exhaust treatment device; a first clamp coupling the exhaust treatment device to the first portion, the first clamp including a stepped inner diameter such that the first clamp engages both the first portion and the exhaust treatment device when the upstream end of the exhaust treatment device is positioned adjacent to the first portion; a second clamp coupling the exhaust treatment device to the second portion, the second clamp including a stepped inner diameter such that the second clamp engages both the second portion and the exhaust treatment device when the downstream end of the exhaust treatment device is positioned adjacent to the second portion, wherein the upstream end of the exhaust treatment device interferes with the second clamp to preclude coupling the second portion to the exhaust treatment device when the upstream end of the exhaust treatment device is positioned adjacent to the second portion.