Showing papers on "Secondary air injection published in 2006"

Exhaust gas recirculation device

Abstract: The invention relates to an exhaust gas recirculation device (1) for an internal combustion engine, in particular in a motor vehicle, having an exhaust gas recirculation line (2) for introducing exhaust gas into a primary intake line (4), with an exhaust gas recirculation valve (3) for controlling the exhaust gas recirculation line (2). The exhaust gas recirculation line (2) has an end section (7) which runs into the primary intake line (4) with an orifice opening (8). In order to improve the reliability of the exhaust gas recirculation device (1), the exhaust gas recirculation valve (3) has a sleeve (10) arranged in the fresh air line (4), said sleeve (10) enclosing the exhaust gas recirculation line (2) in the region of the orifice opening (8), being mounted in the fresh air line (4) so as to be axially adjustable, and presenting a radial internal nozzle contour (11) with a flow cross section which first decreases and then increases in size in the flow direction, the exhaust gas recirculation valve (3) having an actuating device (12) for axially adjusting the sleeve (10) relative to the primary intake line.

System and Method for Diagnostic of Low Pressure Exhaust Gas Recirculation System and Adapting of Measurement Devices

Abstract: A system for a diesel engine having an intake manifold and an exhaust manifold, comprises a turbocharger between the intake and exhaust manifolds of the engine; a low pressure exhaust gas recirculation system with a first end coupled to the exhaust manifold downstream of the turbocharger and a second end couple to the intake manifold upstream of the turbocharger, said low pressure exhaust gas recirculation having a first valve coupled thereto for regulating flow; a high pressure exhaust gas recirculation system with a first end coupled to the exhaust manifold upstream of the turbocharger and a second end coupled to the intake manifold downstream of the turbocharger, said high pressure exhaust gas recirculation having a second valve coupled thereto for regulating flow; a first mass airflow sensor coupled in the engine intake manifold upstream of an inlet of said second end of said low pressure exhaust gas recirculation system; and a control system configured to diagnose the degradation of said first mass airflow sensor.

Internal combustion engine having two exhaust gas turbocharger

Abstract: In an internal combustion engine provided with two exhaust gas turbochargers which each comprise a turbine in an exhaust line and one compressor in an intake section of the engine, two exhaust lines are provided which are each assigned to at least one of the exhaust gas turbines, an exhaust gas recirculation device being arranged between an exhaust line upstream of an exhaust gas turbine and the intake section downstream of a compressor and the two exhaust lines including bypass lines with a control valve for selectively permitting the exhaust gas to bypass the turbine closer to the engine.

Gas Turbine Burner and Method of Mixing Fuel and Air in a Swirling Area of a Gas Turbine Burner

Abstract: A burner, in particular a gas turbine burner, comprises: - at least one swirler (2), the swirler (2) having at least one air inlet opening (16), at least one air outlet opening (18) positioned downstream to the air inlet opening (16) and at least one swirler air passage (14) extending from the at least one air inlet opening (16) to the at least one air outlet opening (18) which is delimited by swirler air passage walls (20, 22, 120); - a fuel injection system which comprises fuel injection openings (26) arranged in at least one swirler air passage wall (20, 120) so as to inject fuel into the swirler air passage (14) ; and - an air injection system which comprises air injection openings arranged in at least one swirler air passage wall and positioned downstream of the fuel injection openings for injecting air into the swirler air passage.

Turbocharged exhaust gas recirculation system

Abstract: An exhaust recirculation system includes a power source including at least one cylinder outputting exhaust gas and a particulate reducing device fluidly connected to at least one exhaust duct of the power source. The particulate reducing device is configured to reduce an amount of particulates in the exhaust gas. The exhaust recirculation system also includes a recirculation compressor configured to receive and compress at least a portion of the exhaust gas. An intake duct of the at least one cylinder of the power source is fluidly connected to the recirculation compressor to receive the compressed reduced-particulate exhaust gas.

Changes in landfill gas quality as a result of controlled air injection.

Abstract: Air addition has been proposed as a technique for rapid stabilization of municipal solid waste (MSW) in landfills. The objective of this study was to observe the change in concentration of trace constituents of landfill gas in response to air addition. Air injection tests were conducted at a MSW landfill in Florida, and the concentrations of several gaseous constituents at adjacent wells within the waste were measured. The concentrations of methane, carbon dioxide, and oxygen, as well as several trace constituents, were measured both prior to and during air addition. The trace components investigated included a suite of volatile organic compounds (VOCs), nitrous oxide (N20), carbon monoxide (CO), and hydrogen sulfide (H2S). A significant increase in CO was observed in 9 of 14 monitoring points; overall, CO concentrations were found to increase as the ratio of CH4 to CO2 decreased. A significant decrease in H2S was observed at 6 of 14 monitoring points. Air injection did not have a noticeable affect on VOC or N2O concentrations compared to initial levels.

System for exhaust gas recirculation in a motor vehicle

Abstract: A system for recirculation of cooled exhaust gas from a vehicle internal combustion engine includes an internal combustion engine ( 2 ) having an intake system ( 6 ) and an exhaust gas system ( 3 ), an exhaust gas recirculation (EGR) line ( 10 ) that contains an exhaust gas cooler ( 12 ), an exhaust gas turbine ( 4 ) arranged in the exhaust gas system, ( 3 ) and a charge air compressor ( 7 ) and a charge air cooler ( 8 ) arranged in the intake system ( 6 ) The exhaust gas stream is extracted at the low pressure side ( 9 ) of the exhaust gas turbine ( 4 ) An exhaust gas compressor ( 13 ) is arranged in the EGR line ( 10 ), and the recirculated exhaust gas stream can be fed to the intake system downstream of the charge air cooler ( 8 )

Exhaust emission control method and exhaust emission control system

Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control method and an exhaust emission control system capable of improving the outflow of HC into the atmosphere, in exhaust gas air-fuel ratio rich control for recovering NOx storage capacity, when removing NOx and PM in exhaust gas by a NOx storage-reduction type catalyst and a DPF with a catalyst. SOLUTION: This exhaust emission control system 1 includes the NOx storage-reduction type catalyst 22 for removing the NOx in the exhaust gas, an HC adsorbent 23 for adsorbing hydrocarbon in the exhaust gas, the FPF 24 with the catalyst or an oxidation catalyst for removing the PM in the exhaust gas, in order from the upstream side of an exhaust passage 11 of an internal combustion engine 10. In NOx regeneration control for recovering the NOx storage capacity of the NOx storage-reduction type catalyst 22, when the index temperature Tc for indexing the temperature of the HC adsorbent 23 is the first determining temperature or below, the air-fuel ratio of the exhaust gas is set to 0.8-1.1 in air excessive ratio conversion, and is set to 1.0-1.1 between the first determining temperature and the second determining temperature, and is set to 0.8-1.1 at the second determining temperature or above. COPYRIGHT: (C)2010,JPO&INPIT

Constant EGR rate engine and method

Abstract: An internal combustion engine ( 100 ) includes a first exhaust manifold ( 120 ), and a second exhaust manifold ( 118 ) fluidly connected to the first exhaust manifold ( 120 ) through an exhaust valve ( 122 ). An exhaust gas recirculation (EGR) cooler ( 124 ) constantly fluidly connects the second exhaust manifold ( 118 ) with an intake manifold ( 112 ). A turbocharger ( 102 ) has a turbine ( 126 ) in fluid communication with the first exhaust manifold ( 120 ), and a compressor ( 132 ) in fluid communication with a supercharger ( 140 ). A charge air cooler ( 150 ) fluidly connects the supercharger ( 140 ) with the intake manifold ( 112 ).

Turbocharged engine system and method of operation

Abstract: A system (10) is provided. The system includes an internal combustion engine having an intake manifold (16) and an exhaust manifold (18) . The system also includes a high pressure turbocharger (20) having a variable geometry high pressure turbine (22) drivingly coupled to a high pressure compressor (24) , wherein the variable geometry high pressure turbine (22) is driven by a first portion of exhaust gases from the exhaust manifold (18) / wherein the high pressure compressor (24) is configured to compress an intake air and to provide the compressed intake air to the intake manifold (16) . The system also includes a low pressure turbocharger (28) having a variable geometry low pressure turbine (30) drivingly coupled to a low pressure compressor, (32) wherein the variable geometry low pressure turbine (30) is driven by a second portion of the exhaust gases from the exhaust manifold.

Method of controlling exhaust gas purification system, and exhaust gas purification system

Abstract: In regeneration control, when the catalyst temperature index temperature (Tg2) using the temperature of the oxidation catalyst (12a) as an index is below a predetermined first determination temperature (Tc1), the rotation speed of idling is brought to a predetermined first target rotation speed (Neil) which is higher than the rotation speed of idling (Nei0) in the ordinary operation, and, further, multi-injection is carried out. On the other hand, when the catalyst temperature index temperature (Tg2) is the predetermined first determination temperature (Tc1) or above, the rotation speed of idling is brought to a predetermined second target rotation speed (Nei2), which is lower than the predetermined first target rotation speed (Nei1) and is higher than the rotation speed of idling (Nei0) in ordinary operation, and, further, post injection is carried out, followed by raising of the temperature of an exhaust gas flown into a DPF apparatus (12b) to a predetermined second determination temperature (Tc2). According to the above constitution, in the regeneration control of the DPF apparatus (12b) in an internal combustion engine (10), the regeneration can be forcibly carried out with high efficiency while enhancing the temperature raising efficiency of the exhaust gas, and, at the same time, excessive rise in the exhaust temperature, a deterioration in fuel consumption, and the occurrence of noise are suppressed.

Fuel cell system with partial recycling of anode exhaust

Abstract: A method of operating a fuel cell system includes providing a fuel inlet stream into a fuel cell stack, operating the fuel cell stack to generate electricity and a hydrogen containing fuel exhaust stream having a temperature above 200 C, lowering a temperature of the fuel exhaust stream to 200 C or less, separating the fuel exhaust stream into a first separated fuel exhaust stream and a second separated fuel exhaust stream, and recycling the first separated fuel exhaust stream into the fuel inlet stream.

Combined EGR valve and cooler by-pass

Abstract: The present invention is an exhaust gas recirculation (EGR) valve for an engine having an exhaust gas recirculation cooler operable for receiving exhaust gas from an exhaust, and delivering the exhaust gas to an intake. The present invention also includes an exhaust gas recirculation bypass passage operable for receiving exhaust gas from an exhaust, bypassing the exhaust gas recirculation cooler, and delivering the exhaust gas to an intake, as well as a single valve operably associated with the exhaust gas recirculation cooler and the exhaust gas recirculation bypass passage. The single valve is selectively operable for opening or closing flow from the exhaust to the exhaust gas recirculation cooler, the exhaust gas recirculation bypass passage, or both, the single valve also operable for metering flow therebetween.

Arrangement for recirculation of exhaust gases of a supercharged internal combustion engine

Abstract: The present invention relates to an arrangement for recirculation of exhaust gases of a supercharged combustion engine (1). The arrangement comprises an exhaust line (3) intended to lead exhaust gases out from the combustion engine (1), an inlet line (7) intended to lead air which is at above atmospheric pressure to the combustion engine (1), a compressor (5) adapted to compressing the air in the inlet line (7) to above atmospheric pressure, and a return line (10) which connects the exhaust line (3) to the inlet line (7) so that it is possible, via the return line (10), to recirculate exhaust gases from the exhaust line (3) to the inlet line (7). The arrangement comprises a first EGR cooler (13a) in which the recirculating exhaust gases in the return line (10) are cooled by the air in a portion (7b) of the inlet line (7) which is situated downstream of the compressor (5) in the inlet line (7) with respect to the direction of flow of the air in the inlet line (7).

Exhaust gas analyzer

Abstract: An exhaust gas analyzer capable of real-time analysis of the concentration, temperature, and the like of an exhaust gas component in a cross-section of an exhaust path in a spot-wise manner reduces analysis cost. An exhaust gas analyzer ( 10 ) comprises sensor units ( 11 ) to ( 14 ) disposed along the exhaust path, which comprises an exhaust manifold ( 3 ) for the engine ( 2 ) discharging exhaust gas, an exhaust tube ( 4 ), a first catalyst device ( 5 ), a second catalyst device ( 6 ), a muffler ( 7 ), and an exhaust pipe ( 8 ). Each sensor unit includes an optical fiber ( 25 ) for irradiating the exhaust gas with laser light, and a detector ( 26 ) for receiving the laser light emitted by the optical fiber that has been transmitted through the exhaust gas. Based on the laser light received by the detector, the condition of an exhaust gas component, such as its concentration, temperature, and the like, is measured for the analysis of the exhaust gas. The sensor unit has a through-hole ( 21 ) allowing the passage of exhaust gas that is formed in a shape matched with a cross-sectional shape of the exhaust path. The infrared laser light R is emitted via the optical fiber ( 25 ) into the through-hole ( 21 ), travels across the exhaust path, and is then received by the detector ( 26 ).

Cooling structure for electricity storage device

Abstract: A cooling structure for an electricity storage device includes: a secondary battery (10) generating heat; a DC-DC converter (20) generating heat in a quantity different from that of secondary battery (10); an exhaust path (30n) for passing air after cooling secondary battery (10) generating heat in a relatively small quantity, and led to the outside of a vehicle; an exhaust path (35n) for passing air after cooling DC-DC converter (20) generating heat in a relatively large quantity, and joining exhaust path (30n); and a circulation path (40) connected to exhaust path (30n) upstream of an air flow beyond a position (38) at which exhaust path (35n) joins, and led to the inside of a vehicle compartment. With this configuration, there is provided a cooling structure for an electricity storage device in which the suppression of both increase in temperature and decrease in inner pressure inside the vehicle compartment can be effectively achieved at the same time.

Disposal method and equipmnt for exhaust gas from combustion system

Abstract: The invention aims at separating carbon dioxide from exhaust combustion gas effectively and making it possible to discharge the residual exhaust combustion gas enriched in the exhaust gas components other than carbon dioxide by the separation of carbon dioxide into the atmosphere. Air (7) is separated into oxygen (9) and a nitrogen-base gas (10a) in an oxygen separator (8); coal (1) is burnt with the oxygen (9) in a burner (5a) in a combustion furnace (4); an exhaust combustion gas from the furnace (4) is subjected to exhaust gas treatment; a part of the resulting exhaust combustion gas is recycled to the burner (5a), while the remainder is compressed: the carbon dioxide (29) liquefied by the compression is taken out, while the residual exhaust gas component (31) which is not liquefied by compression is mixed and diluted with the nitrogen-base gas (10a) obtained by separating the oxygen (9) from the air (7) in the oxygen separator (8); and the diluted exhaust gas is discharged into the atmosphere.

Control apparatus of direct injection internal combustion engine

Abstract: A direct injection internal combustion engine control apparatus used in an idling stop vehicle or the like, which can reduce residual fuel generated in a combustion chamber in an engine stop time, and prevent deterioration of exhaust performance and deterioration of exhaust gas performance (A/F control precision) at the time of engine restart. The control apparatus includes a device for automatically stopping an internal combustion engine upon satisfaction of a predetermined automatic stop condition, and at least one of a fuel injection control unit which corrects fuel injection and an air-flow amount control unit which corrects an air-flow amount. Upon satisfaction of the predetermined automatic stop condition, at least one of fuel injection correcting control by the fuel injection control unit and air-flow amount correcting control by the air-flow amount control unit is performed.

Exhaust gas purifying filter failure diagnosis device and method

Abstract: PROBLEM TO BE SOLVED: To provide a means using a PM sensor for the failure diagnosis of a DPF. SOLUTION: This exhaust gas purifying filter failure diagnosis device comprises an exhaust gas purifying filter provided in an exhaust passage of an internal combustion engine for trapping particulates contained in exhaust gas from the internal combustion engine, and a particulate amount detecting sensor provided on the downstream side of the exhaust gas purifying filter for detecting a particulate amount in the exhaust gas. A failure of the exhaust gas purifying filter is determined in accordance with the particulate amount on the downstream side of the exhaust gas purifying filter, detected by the particulate amount detecting sensor (S106). The trapping efficiency of the exhaust gas purifying filter is considered when determining the failure (S102, S202). COPYRIGHT: (C)2008,JPO&INPIT

Diesel exhaust article and catalyst compositions therefor

Abstract: A self -cleaning diesel exhaust particulate filter system (10) is disclosed wherein burn-off of collected particulate matter is accomplished at normal exhaust gas temperatures, the filter system being provided with a catalyst mixture of a co-formed ceria-zirconia composite and, optionally, a base metal oxide, the presence of which allows regeneration of filters at temperatures that are readily achieved in diesel exhaust systems, including operating conditions that are at low load where lower exhaust temperatures exist.

Fuel injection controller for in-cylinder injection engine

Abstract: A fuel injection controller of an in-cylinder injection engine determines that a combustion state has deteriorated and executes a split injection for injecting fuel in split amounts into each cylinder in multiple injection events in a cycle of the cylinder if it is determined that a combustion fluctuation is greater than a predetermined determination value during operation of the engine. The fuel injection controller increases a ratio of an injection amount of the first injection event in the split injection and lengthens an injection interval between the injection events as the combustion fluctuation increases. Thus, a wet amount of the injected fuel is reduced to expedite atomization of the injected fuel and to homogenize an in-cylinder mixture gas. As a result, the combustion state is improved.

Model based diagnostics for an aftertreatment fuel dosing 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.

Fire protection with fuel cell exhaust air

Abstract: According to an exemplary embodiment of the present invention, a fire protection system for reducing the danger of fire is provided, which has a fuel cell for producing a nitrogen-enriched cathode exhaust air. The fuel cell is supplied with air and a fuel. Within the fuel cell, the air is then reduced to a determined oxygen content. The exhaust air is supplied to the room to be protected.

Fuel cell system with electrochemical anode exhaust recycling

Abstract: A method of operating a fuel cell system includes providing a fuel inlet stream into a fuel cell stack, operating the fuel cell stack to generate electricity and a hydrogen containing fuel exhaust stream, separating at least a portion of hydrogen contained in the fuel exhaust stream using a high temperature, low hydration ion exchange membrane cell stack, and providing the hydrogen separated from the fuel exhaust stream into the fuel inlet stream.

Exhaust gas heat exchanger, in particular an exhaust gas cooler for exhaust gas recirculation in a motor vehicle

Abstract: The invention relates to an exhaust gas heat exchanger, in particular, to an exhaust gas cooler for exhaust gas recirculation in a motor vehicle comprising heat exchanging conduits which are passed through by exhaust gases, surrounded by a coolant and linked to a distributing and/or collecting chambers comprising a flux guiding device which is provided with the exhaust gas input and output sides and a plurality of channels extending therebetween and inclined to each other

Fuel cell system for extinguishing fires

Abstract: According to an exemplary embodiment of the present invention, a fire fighting system for extinguishing a fire is provided, which has a fuel cell for producing a nitrogen-enriched cathode exhaust air. The fuel cell is supplied with air and a fuel. Within the fuel cell, the air is then reduced to a determined oxygen content. The exhaust air is supplied to the fire source.

Use of recirculated exhaust gas in a burner-based exhaust generation system for reduced fuel consumption and for cooling

Abstract: A burner-based exhaust gas generation system, for producing exhaust gas, typically for use in testing exhaust system devices. Post-burner exhaust gas is recirculated back to a main exhaust line, and used for purposes such as cooling or enhancing the burner output.

Exhaust gas treatment apparatus for engine

Abstract: PROBLEM TO BE SOLVED: To stably maintain the internal temperature of an injection valve at an appropriate level in an exhaust gas treatment apparatus for an engine in which a reducer is supplied into exhaust gases by the injection valve. SOLUTION: The reducer 16 is supplied into the exhaust gases 4 exhausted from the engine and flowing down an exhaust gas duct 5, and nitrogen oxides contained in the exhaust gases are removed from the exhaust gases by reducing/reacting the nitrogen oxides with the reducer on a selective reducing catalyst. The reducer is supplied into the exhaust gases by the injection valve 17. A cooling chamber 24 is so formed as to surround the injection valve. A cooling medium is circulated through the cooling chamber to cool the injection valve. COPYRIGHT: (C)2008,JPO&INPIT