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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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Journal ArticleDOI
TL;DR: In this article, a methane direct injection stratified charge engine premixed with a hydrogen lean mixture was analyzed, and the results showed that the combustion system achieved a higher thermal efficiency due to higher flame propagation velocity and lower exhaust emissions.
Abstract: Characteristics of combustion and emissions in a methane direct injection stratified charge engine premixed with hydrogen lean mixture were analyzed. Results showed the combustion system achieved a higher thermal efficiency due to higher flame propagation velocity and lower exhaust emissions. An increase in the amount of premixed hydrogen stabilizes the combustion to reduce HC and CO exhaust emission, and increases the degree of constant volume combustion and NOx exhaust emission. The increase in NOx emission can be maintained at a lower level with retarded ignition timing without deteriorating the improved thermal efficiency.

43 citations

Book
Cornel Stan1
01 May 2000
TL;DR: In this article, the authors discuss the physical possibilities of direct injection methods for spark-ignition engines, including direct injection as an element of the mixture formation concept, direct injection rate modulation, injection systems with speed dependent injection rate, injection system with accumulated fuel high-pressure (Common Rail), injection systems for alternative fuels (liquid gases), and injection system for diesel pressure pulse system.
Abstract: The topics covered in this book include direct ignition systems for spark ignition engines (direct injection as an element of the mixture formation concept, the physical possibilities of direct injection methods, the Mitsubishi method, the Common Rail method, the ZWICKAU Pressure Pulse system, the IFP method and the Orbital method) and direct injection systems for compression ignition engines (injection rate modulation, injection systems with speed dependent injection rate, injection systems with accumulated fuel high-pressure (Common Rail), injection systems with speed dependent pressure wave and variable flow passage, injection systems with speed dependent modulation of the pressure wave - the diesel pressure pulse system, and injection systems for alternative fuels (liquid gases)).

43 citations

Patent
23 Jan 1987
TL;DR: In this article, an air supply apparatus for fuel cell system serves to supply air to the cell cathode and the combustion section of the reformer in the fuel cell systems and recover energy from exhaust gases being discharged from the system.
Abstract: The air supply apparatus for fuel cell system serves to supply air to the cell cathode and the combustion section of the reformer in the fuel cell system and recover energy from exhaust gases being discharged from the system. The apparatus has a compressor for supply of air to the system, an exhaust gas turbine for driving the compressor through recovery of energy from the system exhaust gas, an auxiliary combustor for compensating deficiency of the energy being recovered, if any, and pipe lines connecting those parts. The auxiliary combustor particularly employs a combustion catalyst in its combustion section. The apparatus secures stable combustion of the fuel gas in the auxiliary combustor, and its operation displays improved stability against any load change or partial load.

43 citations

Patent
27 Jan 2005
TL;DR: In this article, a modular replacement exhaust system was proposed for a range of vehicle applications including automobiles, motorcycles, and all terrain vehicles, consisting of a header pipe and a muffler.
Abstract: A vehicle exhaust assembly (100) for improved evacuation of exhaust gases from an internal combustion engine. The system comprises a modular replacement exhaust system having a novel header pipe (102) and muffler (104). The present invention readily adapts to a range of vehicle applications including automobiles, motorcycles, and all terrain vehicles.

43 citations

Patent
01 Apr 1991
TL;DR: In this article, a method of removing nitrogen oxides in exhaust gases from a diesel engine by using a catalyst in a reacter under the presence of ammonia was proposed, where a humidity of in-take air as a specific factor and one or more of engine power, fuel consumption amount of engine, and exhaust gas temperature as selective factors are measured respectively as the measuring factors and the flow rate of ammonia is controlled based on measured values and ammonia is supplied to an exhaust gas flow channel from the engine to the reactor.
Abstract: The present invention concerns a method of removing nitrogen oxides in exhaust gases from a diesel engine by using a catalyst in a reacter under the presence of ammonia, wherein a humidity of in-take air as a specific factor and one or more of engine power, fuel consumption amount of engine, temperature of engine in-take air and exhaust gas temperature as selective factors are measured respectively as the measuring factors and the flow rate of ammonia is controlled based on measured values and ammonia is supplied to an exhaust gas flow channel from the engine to the reactor.

43 citations


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