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forced exhaust diffuser

A technology of controller and exhaust flow, applied in the direction of exhaust device, exhaust treatment, electronic control of exhaust treatment device, etc., can solve problems such as obstruction

Active Publication Date: 2022-04-26
CUMMINS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ability to control exhaust gas temperature in such a system depends on the temperature requirements of engine operation or aftertreatment systems, thus also impeding the ability to reliably reduce exhaust outlet temperature below a certain threshold

Method used

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Examples

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Embodiment Construction

[0015] For the purpose of clearly, concisely and accurately describing example embodiments of the invention, the manner and process of making and using the invention, and to enable the practice, making and use of the invention, reference will now be made to certain example embodiments, including the those shown, and specific language will be used to describe the invention. It is to be understood, however, that no limitation on the scope of the invention is thereby produced and that such changes, modifications and other applications of the example embodiments will occur to those skilled in the art that the invention encompasses and protects.

[0016] refer to figure 1 , shows a system 10 that includes an internal combustion engine 14 that receives an intake airflow 16 and fuel and is operable to generate an exhaust flow 12 that enters an exhaust system 20 . Exhaust stream 12 includes a volume of exhaust that passes through aftertreatment system 22 to tailpipe 24 of exhaust sy...

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Abstract

Systems, methods, and apparatus are disclosed herein that include an exhaust system and an air source external to the exhaust system configured to force additional air into the exhaust stream downstream of the engine; Aftertreatment system where air is mixed with exhaust. The amount and timing of mixing of the forced air with the exhaust may be determined by an electronic controller such that mixed air is provided in response to one or more predetermined and / or expected operating conditions.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of the filing date of US Provisional Application Serial No. 62 / 035,143, filed August 8, 2014, the entire contents of which are incorporated herein by reference. technical field [0003] Disclosed herein are systems, methods and apparatus for cooling exhaust at or near a tailpipe using ambient air from a blower. Background technique [0004] Under nominal engine operating conditions, the temperature of the exhaust gas leaving the tailpipe is higher than the ambient temperature. This condition is expected due to combustion events occurring in the engine. As aftertreatment systems are added, the exhaust gas temperature must be periodically increased above that caused by nominal engine operation to help maintain proper operation and efficiency of the aftertreatment system. The duration and temperature increase above nominal depends on the type of aftertreatment device, the materials u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/02
CPCF01N3/323F01N9/00F01N13/082F01N3/00F01N2270/02F01N2560/06F01N2900/1404F01N3/05Y02T10/12Y02T10/40F01N11/002
Inventor S.G.德克
Owner CUMMINS INC