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Secondary air injection

About: Secondary air injection is a research topic. Over the lifetime, 11452 publications have been published within this topic receiving 112147 citations.


Papers
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Patent
14 Mar 2006
TL;DR: In this paper, an expected relationship between a temperature within the exhaust system and a commanded fuel injection rate or amount is compared to an actual relationship in order to detect faults in an exhaust line fuel injection system.
Abstract: The invention relates to systems and methods of detecting faults in an exhaust line fuel injection system. An expected relationship between a temperature within the exhaust system and a commanded fuel injection rate or amount is compared to an actual relationship in order to detect faults. The temperature is preferably a temperature of, within, or downstream of an exhaust system device that catalyzes an oxidation or partial oxidation reaction of the fuel, such as an oxidation catalyst or a fuel reformer. The expected relationship may be defined in terms of a thermal model of a system comprising the catalytic device. The invention can be used to detect spray quality faults or to detect fuel injector faults without the use of flow meter.

30 citations

Patent
17 Sep 1999
TL;DR: In this article, a method for operating an internal combustion engine system in a desulfurization mode each time following a cold-start of the engine prior to the transition to a normal operating mode is presented.
Abstract: A method for operating an internal combustion engine system includes operating the internal combustion engine system in a desulfurization mode each time following a cold-start of the engine prior to the transition to a normal operating mode. The internal combustion engine system includes (1) an exhaust line; (2) a sulfur-rich exhaust purification component comprising at least two exhaust purification units connected in series in the exhaust line; and (3) a secondary air supply having separate branches for the sulfur-rich exhaust purification units.

30 citations

Journal ArticleDOI
01 Jun 2009-Fuel
TL;DR: In this article, a bubbling fluidized bed of 102mm inside diameter and 900mm height was used to burn olive cake and coal mixtures for co-combustion tests.

30 citations

Patent
23 Oct 1996
TL;DR: In this article, a method of reducing the NO x concentration in the exhaust streams of internal combustion ignitions was proposed. But this method requires the use of a selective reducing agent, such as ammonia, hydrazine and cyanuric acid.
Abstract: The invention discloses a method of reducing the concentration of NO x in the exhaust streams of internal combustion ignitions wherein a selected producing agent is introduced into the combustion chamber of such an engine via the fuel and/or air feed stream introduced into the combustion chamber. Also disclosed is an apparatus for reducing the concentration of NO x in the exhaust streams of internal combustion engines having a piston-cylinder assembly having an air fuel mixture contained therein, a means for storing a selective reducing agent selected from the group consisting of ammonia, hydrazine and cyanuric acid and a means for introducing the reducing agent into the lean air/fuel mixture before combustion occurs such that upon combustion of the air/fuel mixture, the reducing agent decomposes to react with one or more products of combustion to produce an engine exhaust stream having a reduced concentration of NO x .

30 citations

Patent
31 May 1995
TL;DR: In this article, a method and apparatus for removing volatile contaminants from the phreatic zone of contaminated ground was proposed, consisting of at least one air injection well and at least two pressure relief wells arranged in a line.
Abstract: A method and apparatus for removing volatile contaminants from the phreatic zone of contaminated ground. The apparatus is a system comprised of at least one air injection well and at least two pressure relief wells arranged in a line. Air is injected into the contaminated ground water to allow sparging of the volatile contaminants from a linear region between injection and relief wells. The volatile contaminants are captured by the injected air and carried to the extraction line for removal and treatment.

30 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202327
202277
202160
2020146
2019173
2018159