Topic
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.
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TL;DR: In this article, a can-type gas turbine combustor operating in flameless combustion mode with liquid fuels was designed and developed, in which air is supplied from different injection holes namely, swirl air near fuel injection, primary, secondary and dilution air in downstream.
30 citations
Patent•
30 Jul 2010
TL;DR: An SCR exhaust gas aftertreatment device in which a urea-water solution is injected into an exhaust gas line is provided in this paper, and at least one component of the device lies in an area of an internal space, and is bounded by an elastomer membrane that is embedded in a frost equalization foam.
Abstract: An SCR exhaust gas aftertreatment device in which a urea-water solution is injected into an exhaust gas line is provided. At least one component of the device (e.g., a filter element) lies in an area of an internal space, and is bounded by an elastomer membrane that is embedded in a frost equalization foam. This prevents freezing damage even over a very long period of time and a large number of freezing cycles.
30 citations
Patent•
01 May 1973
TL;DR: In this article, the authors present a method and installation for the predetermined addition of secondary air used in effecting optimum combustion of internal combustion engine exhaust gases, including a control arrangement including one or more measuring devices sensing engine operating or exhaust gas contents and, in response to the sensed conditions, regulating the addition of primary air in order to obtain optimum exhaust gas combustion.
Abstract: Method and installation for the predetermined addition of secondary air used in effecting optimum combustion of internal combustion engine exhaust gases, including a control arrangement including one or more measuring devices sensing engine operating or exhaust gas contents and, in response to the sensed conditions, regulating the addition of secondary air in order to obtain optimum exhaust gas combustion.
30 citations
Patent•
30 Apr 1975TL;DR: In this article, a gas sensor is positioned in the intake manifold and is responsive to a characteristic of the air mixture entering the manifold to generate electrical control signals for controlling the injecting of the fuel to the engine.
Abstract: In a fuel injection system for an internal combustion engine, a gas sensor is positioned in the intake manifold and is responsive to a characteristic of the air mixture entering the intake manifold to generate electrical control signals for controlling the injecting of the fuel to the engine In the preferred embodiment, the air and the recirculated exhaust gas (EGR) are mixed together in a throttle body and the resultant mixture passes by the gas sensor prior to being distributed throughout the manifold system The output signal of the sensor is used in controlling the injection time of the fuel injectors Fuel delivery correction delays due to transport lag in conventional closed loop fuel injection systems using oxygen gas sensors placed in the exhaust system are greatly minimized
30 citations
Patent•
01 Jul 2005TL;DR: In this article, a valve actuating system is employed for variably actuating the intake and exhaust valves and adjusting the flow of air and burned gases entering the combustion chamber, which affects the air-fuel ratio in the cylinder.
Abstract: A method is disclosed for controlling the air-fuel ratio in a four-stroke gasoline direct-injection controlled auto-ignition combustion. The engine is operated with two sequential pairs of expansion and contraction strokes during two revolutions of the engine crank, the two revolutions defining a combustion cycle. A system is employed for variably actuating the intake and exhaust valves and adjusting the flow of air and burned gases entering the combustion chamber. Adjusting the flow affects the resulting air-fuel ratio in the combustion chamber. The valve actuating system is employable to operate the intake and exhaust valves with an exhaust re-compression or an exhaust re-breathing valve strategy. Either valve strategy affects the air-fuel ratio in the cylinder and causes a proportion of burned gases from previous combustion cycles to be retained in the cylinder to provide the necessary conditions for auto-ignition of the air-fuel mixture.
30 citations