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Automotive diesel exhaust HC dosing valve

a technology of hydrocarbon dosing valve and diesel engine, which is applied in the field of new hydrocarbon dosing valve system, can solve the problems of increasing costs, reducing reliability, and ineffective reduction of nosub>x/sub>,

Inactive Publication Date: 2007-02-15
SIEMENS VDO AUTOMOTIVE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] In view of the foregoing, it is an object of the invention to provide a dosing valve assembly for an internal combustion engine that eliminates the need for water cooling of the dosing valve.

Problems solved by technology

These converters virtually eliminate the typical odors associated with diesel engines, and reduce visible particulates, however they are not effective in reducing NOx due to excess oxygen in the exhaust gas stream.
However, this requires specialized plumbing and systems that ultimately increase costs and reduce reliability.

Method used

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  • Automotive diesel exhaust HC dosing valve
  • Automotive diesel exhaust HC dosing valve
  • Automotive diesel exhaust HC dosing valve

Examples

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Embodiment Construction

[0016] Embodiments of the invention will be described with reference to the accompanying drawing figures wherein like numbers represent like elements throughout. Before embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of the examples set forth in the following description or illustrated in the figures. The invention is capable of other embodiments and of being practiced or carried out in a variety of applications and in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,”“comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0017] Referring to FIG. 1, there is depicted a system schematic of an exemplary reducing agent dosing system 100. Exhaust from a...

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Abstract

A dosing valve assembly is disclosed for administering a reducing agent into an exhaust stream within an exhaust manifold of an internal combustion engine. The dosing valve assembly comprises a control valve coupled to a source of the reducing agent, a reducing agent delivery valve constructed and arranged for coupling to the exhaust manifold to enable a specified quantity of reducing agent to be administered into the exhaust stream, and an elongated conduit disposed between the control valve and reducing agent delivery valve for fluidly communicating reducing agent from the control valve to the reducing agent delivery valve. The disclosed arrangement enables the reducing agent delivery valve to be coupled to the exhaust manifold and the control valve to be displaced from the reducing agent delivery valve and away from the high temperature environment associated with the exhaust manifold.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application Ser. No. 60 / 708,195 entitled “AUTOMOTIVE DIESEL EXHAUST HC DOSING VALVE,” filed Aug. 15, 2005, the contents of which are hereby incorporated by reference herein in their entirety.FIELD OF THE INVENTION [0002] The present invention relates generally to a system for reducing particulates and nitric oxide (NOx) emissions by diesel engines, and more particularly, to a novel hydrocarbon (HC) dosing valve system that eliminates the requirement for water cooling in a high temperature environment. BACKGROUND OF THE INVENTION [0003] Hydrocarbons and NOx emissions are a direct result of the combustion process in an internal combustion engine. To reduce such harmful emissions, catalytic converters are employed to reduce their toxicity. For gasoline engines, “three-way catalysts” are used to reduce nitrogen oxides to nitrogen and oxygen (2NOx→xO2+N2), oxidize carbon monoxide to car...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01N3/00F01N3/10
CPCF01N3/0821F01N3/2066Y02T10/24F01N2610/03F01N2610/1453F01N3/36Y02T10/12
Inventor HOMBY, MICHAEL J.BUGOS, STEPHEN
Owner SIEMENS VDO AUTOMOTIVE CORP
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