Abstract: An air-fuel ratio control apparatus of an internal combustion engine includes: an exhaust gas purifying catalyst disposed in an exhaust passage of the internal combustion engine; fuel cutting means for cutting fuel to be supplied to the internal combustion engine at the time of deceleration of the internal combustion engine; and catalyst degradation suppressing means for suppressing degradation of the exhaust gas purifying catalyst by prohibiting operation of the fuel cutting means when it is determined that the degradation of the exhaust gas purifying catalyst advances, wherein the catalyst degradation suppressing means sets an operation permitting period, during which the operation of the fuel cutting means is permitted after completion of a fuel quantity increasing operation of the internal combustion engine.

Abstract: The present invention provides an exhaust cooler mounted to a tailpipe for receiving exhaust gas. The exhaust cooler includes a jet pump connectable to the tailpipe and a nozzle connectable to the tailpipe. The nozzle defines a nozzle opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump. A first member is included that is moveable between a closed position and an open position, the open position defining a first opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump.

Abstract: An apparatus, system, and method for cooling exhaust gases includes an inlet operatively connected to an exhaust port from a diesel engine or the like, and a housing defining a substantially enclosed volume. At least a portion of the volume is larger in cross-section than the inlet in cross-section, such that the exhaust gases expand upon entering the housing from the inlet. At least one outlet larger in collective cross-section than the inlet in cross-section is disposed on the housing and configured to expel the exhaust gases from the housing into the atmosphere.

Abstract: A heat transfer system in an engine for transferring heat from the recirculated exhaust gas to an output of an engine exhaust system. The heat transfer may cool the recirculated exhaust for reduced emissions from engine combustion and, at the same time, increase the output exhaust temperature to facilitate regeneration of an exhaust aftertreatment system. There may a heat transfer unit at the output of an exhaust gas recirculating valve connected to a heat transfer unit at the output of the exhaust system.

Abstract: A catalyst system that may regenerate while removing pollutants from an exhaust gas of an engine. The system may have a converter with multiple segments of chambers. At least one of the chambers may be regenerated while the remaining chambers are removing pollutants from the exhaust. The chambers may be rotated in turn for one-at-a-time regeneration. More than one chamber may be regenerated at a time to remove collected pollutants. The system may have plumbing and valves, and possibly mechanical movement of the chambers, within the system to effect the changing of a chamber for regeneration. The chambers connected to the exhaust may be in series or parallel. A particulate matter filter may be connected to the system, and it also may be regenerated to remove collected matter.

Abstract: An exhaust heat recovery system 25 provided with a plurality of heat pipes 60, 61 provided with heat recovery parts 60a, 61a and heat exchange parts 60b, 61b. The heat pipes recover heat from exhaust gas exhausted from an internal combustion engine at the heat recovery parts and transfer this recovered heat to an object to be heated at the heat exchange parts. The heat recovery part 60a of the first heat pipe 60 recovers heat from the exhaust gas at an exhaust purification catalyst 20? provided in an engine exhaust passage or its upstream side. The heat recovery part 61b of the second heat pipe 61 recovers heat from the exhaust gas at the downstream side of the exhaust purification catalyst. Due to this, there is provided an exhaust heat recovery system which can recover at least a fixed amount of exhaust heat at all times while maintaining a warm-up performance of the exhaust purification catalyst.

Abstract: This embodiment of this exhaust apparatus relates to an air intake device and a rotating blade assembly (50 and 51) which significantly reduce greenhouse gases, hydrocarbon and oxides of nitrogen emissions and other gases and pollutants not yet required to be tested, exhaust noise and temperature of the exhaust gases. By its chilling effect it also improves the efficiency of an internal combustion engine. An electric motor drive shaft (69) is coupled to the drive shaft (67) at the rear of the unit. The drive shaft (66) is attached to the centrifuge and rotating blade assembly (51) creating a vacuum which draws chilled exhaust gases into the unit. The vacuum helps to cool the engine and chill the gases. The gases are mixed and the resultant gaseous mixture exits from the blades into a mixture of exhaust gases (43) and chilled air (35), making a chilled air and exhaust gas mixture (58) exiting through a discharge port in the rear of the unit (65).

Abstract: An exhaust manifold cooling jacket has internal passages for the circulation of liquid coolant and encloses an exhaust manifold such that a gap is created between the exhaust manifold and cooling jacket. Flowing coolant through the jacket regulates outer jacket temperature while enabling high intra-manifold exhaust gas temperatures for thorough intra-manifold combustion and improved emissions. A liquid-cooled exhaust system includes a turbocharger disposed between manifold and elbow, with liquid coolant flowing from manifold to elbow through the turbocharger. Another liquid-coolant exhaust manifold contains an internal exhaust combustion catalyst wrapped in an insulating blanket. In some marine applications, seawater or fresh water coolant is discharged into the exhaust gas stream at an attached exhaust elbow.

Abstract: Clogging of an injection nozzle which supplies a reducing agent to the exhaust gas on an upstream side of a reduction catalyst in the exhaust gas passage is prevented, and the efficiency of NOx purification processing is improved. A reducing agent supply unit uses a detection signal of the exhaust gas temperature from a temperature detection device to set a supply quantity at or above a lower limit for cooling the interior of an injection nozzle to below the temperature at which urea water crystallizes, for the detected exhaust gas temperature, and supplies urea water to the injection nozzle at the set supply quantity. By such supply of urea water, the interior of the injection nozzle is cooled to below the temperature at which the urea water crystallizes. As a result, the urea water does not crystallize inside the injection nozzle, and clogging of the injection nozzle can be prevented.

Abstract: A thermoelectric generator that reduces the size of an entire exhaust apparatus for an internal combustion engine, while ensuring the amount of electric power generated by a thermoelectric generation element and the purging effect of a catalyst device. The thermoelectric generator includes a catalyst device, arranged in the exhaust passage, for purging exhaust. A thermoelectric generation element, which is arranged on the catalyst device, converts thermal energy of the exhaust passing through the exhaust passage to electric energy. The thermoelectric generation element is arranged at a downstream portion of the catalyst device with respect to the flow of the exhaust.

Abstract: The present invention relates to an exhaust system for an internal combustion engine, in particular in a motor vehicle, with an exhaust line in which an oxidation catalyst is provided for treatment of the exhaust gases coming from the internal combustion engine. To be able to heat the oxidation catalyst more rapidly in a cold start of the internal combustion engine, a pre-oxidation unit may be provided in the exhaust line upstream from the oxidation catalyst and connected to a secondary fuel supply and adapted so that it partially oxidizes the secondary fuel supplied in combination with an oxidizer in a catalyst heating operation and the partially oxidized intermediate products are supplied to the oxidation catalyst for complete oxidation.

Abstract: A device for cooling a gas is provided. The device comprises an inlet having a first diameter, a mixing section downstream of the inlet and having a second diameter, and an opening in fluid communication with the mixing section and a source of air. The device is such that the second diameter is smaller than the first diameter and a vacuum is created for drawing in the air from the opening as gas passes from the inlet to the mixing section so that the air drawn into the mixing section mixes with the gas. A method for mixing two gases and an exhaust system are also provided.

Abstract: An engine arrangement includes an engine, an exhaust line downstream of the engine, an aftertreatment device in the exhaust line, and a conduit between a source of fluid and a point in the exhaust line upstream of the aftertreatment device. A method is also disclosed.

Abstract: The invention relates to a heating and/or cooling system (2) for a motor vehicle with a combustion engine (4) and a catalytic converter (8) arranged in the exhaust gas path (6) of the combustion engine (4), comprising a burner (10) attached before the catalytic converter (8) to the exhaust gas path (6) as well as a heat exchanger (12) for transmitting heat generated in the burner (10) to a heating and/or cooling circuit (28) of the motor vehicle. It is proposed that the heat exchanger (12) be arranged behind the catalytic converter (8) in the exhaust gas path (6) of the combustion engine (4) and can be acted upon through the catalytic converter (8) with hot combustion gases from the burner (10).

Abstract: A fluid entrainment apparatus is provided which operates to mix a first fluid stream with a second fluid stream. The apparatus includes first and second fluid flow conduits. The first fluid flow conduit includes a nozzle portion having a converging bore through which the first fluid is accelerated. Additionally, the second fluid flow conduit includes a nozzle portion having a converging bore, a duct portion having a generally cylindrical bore, and a diffuser portion having a diverging bore. The nozzle portion of the second fluid flow conduit is mounted with respect to the nozzle portion of the first fluid flow conduit such that an annular port is formed through which the second fluid passes to mix with the first fluid. Additional fluid mixing occurs in the duct portion and the diffuser portion. The fluid entrainment apparatus may be configured for use within a vehicle exhaust system.

Abstract: A vaporization device for a motor vehicle exhaust system vaporizes an oxidizable liquid and introduces a vapor produced from the oxidizable liquid into an exhaust gas flow of the motor vehicle exhaust system. The vaporization device includes a heating element that is arranged in a housing, and which has the form of a glowing filament. The housing has an inlet for the liquid, at least one vaporization chamber, and an outlet for the vapor. The glowing filament is embedded in a glow tube surrounding the glowing filament. The glowing filament and the glow tube constitute a prefabricated unit which is fastened on a side of the housing by the glow tube being mounted directly to the housing. Furthermore, an exhaust system having a vaporization device, and a method of producing a vaporization device are described.

Abstract: A method for operating an exhaust-gas treatment device of an internal combustion engine and a device for carrying out the method, in which a reagent, whose pressure is measured by a reagent pressure sensor, is introduced into the exhaust-gas area upstream from the exhaust-gas treatment device. First the reagent pressure is brought to the exhaust-gas pressure which prevails in the exhaust-gas area upstream from the exhaust-gas treatment device. Then the pressure difference between the reagent pressure and the sum of the exhaust-gas pressure and the ambient air pressure is compared to a predefined pressure difference threshold, and if the pressure difference threshold is exceeded an error signal is supplied. The procedure contributes to an exact metering of the reagent through a diagnosis of the reagent pressure sensor.

Abstract: The present invention relates to an exhaust system for an internal combustion engine, in particular in a motor vehicle, having an exhaust line carrying exhaust gas away from the internal combustion engine and having a fuel injector for injecting fuel into the exhaust line. The fuel injector is mounted on the exhaust line via a mounting device. This mounting device has a receiving body into which the fuel injector is inserted and which is mounted on the exhaust line via a disk-shaped flange. To reduce the risk of overheating of the fuel injector, the flange is mounted on the receiving body via a constriction in cross section and/or on the exhaust line via a thermal insulator.

Abstract: Heat recovery for internal combustion engine, includes introducing a first fluid into heat exchanging element, and withdrawing the heated first fluid from the heat exchanger elements; and supplying at least one second fluid which is used during the operation of the internal combustion engine and is heated, so as to flow outside and in contact with the heat exchanging elements to transfer heat through walls of the heat exchanging element from the second fluid to said first fluid.

Abstract: A marine engine exhaust system has an oxygen sensor located within a catalyst housing structure and downstream from a catalyst device. The oxygen sensor is located away from a reversion liquid trajectory path that defines the likely path of liquid water flowing in a reverse direction through the marine engine exhaust system toward a plurality of exhaust ports of the engine. By locating the oxygen sensor away from this reversion liquid trajectory path, the likelihood of damage to the oxygen sensor from contact with liquid water is significantly reduced.

Abstract: A heating system for use on an exhaust system having an exhaust gas passageway, the engine having a cooling system to circulate a cooling fluid to and from the engine, includes a fuel-dosing member for dosing fuel to the exhaust system to trigger a regeneration event. A particulate filter is located on the exhaust gas passageway downstream of the engine, and an oxidation catalyst member is located upstream from the particulate filter. The oxidation catalyst member oxidizes the fuel dosed to increase the temperature of the exhaust gases. The increased temperature causes a regeneration event at the particulate filter, which further increases the temperature of the exhaust gases. A heat exchanger is located downstream of the particulate filter for capturing heat from the exhaust gases. The heat exchanger has an inlet conduit and an outlet conduit for circulating the cooling fluid from the heat exchanger to the engine cooling system.

Abstract: A watercraft has an exhaust conduit that includes an exhaust gas passage and a cooling water passage. The exhaust gas passage and the cooling water passage are configured to mix together an exhaust gas flow and a cooling water flow at a junction. The mixture is ultimately discharged from the watercraft. The watercraft has an exhaust valve drive system that has a drive motor and a controller. The exhaust valve drive system operates an exhaust control valve to control the flow of exhaust gases through the exhaust conduit. The exhaust control valve includes a pivot shaft extending generally horizontally and attached to a valve body. The exhaust control valve is positioned upstream of the junction. The controller operates the drive motor which drives the exhaust control valve between an open position and closed position. The controller can receive signals from an engine rotation sensor and a throttle opening sensor and can control the drive motor based on these signals.

Abstract: Emissions from systems that use a catalytic converter are substantially reduced by introducing hydrogen, or a hydrogen containing fluid or fuel component, into the exhaust stream being scrubbed by the catalytic converter, resulting in instant lightoff and a significant reduction in emissions. Hydrogen for injection into the exhaust stream may, optionally, be generated within the vehicle using heat recovered from the catalytic converter, and/or the engine or elsewhere in the exhaust system, by a thermoelectric generator, the electrical output of which may be used to perform electrolysis and/or to power a reformer in order to generate the hydrogen. The thermoelectric generator may be retrofit onto the catalytic converter, or integrated in a way that enhances thermoelectric generation, including providing a catalyst coated heat sink and integrated cooling pipes to enhance the thermal differential required for thermoelectric generation.

Abstract: An exhaust system includes a reverse flow heat exchanger having a plate separating an intake chamber and an exit chamber, each chamber having an inlet and an outlet located at opposing ends to allow flow therethrough. The plate can include a vane connected to the end of the plate in the vicinity of an inlet or an outlet. The vane is configured to reduce resistance to fluid flow near the intake chamber inlet. The exhaust system includes a heating manifold, such as a combustion chamber, configured to receive an exhaust stream from the intake chamber, further heat the exhaust stream, and return the exhaust stream to the exit chamber. Embodiments of the system can be configured to additionally perform as a catalytic converter and/or a muffler.

Abstract: The invention relates to an exhaust-gas heat exchanger, in particular an exhaust-gas cooler (1) for exhaust-gas recirculation (AGR) in motor vehicles equipped with channels, through which exhaust gas flows. According to the invention, a catalyst (8), in particular an oxidation catalyst, is connected upstream of the exhaust-gas heat exchanger (1).

Abstract: An exhaust emission control system. A generator has a thermoelectric conversion element for achieving thermoelectric conversion by making use of heat of exhaust gas. An exhaust purifying catalyst disposed in the generator or on the exhaust downstream side of the generator, and a heat conduction varying device make heat conduction from the exhaust gas to the thermoelectric conversion element variable between a high conduction state and a low conduction state. When a temperature of the exhaust purifying catalyst is higher than a predetermined temperature, the heat conduction varying device varies the heat conduction from the exhaust gas to the thermoelectric conversion element into the high conduction state. This permits the system to efficiently re-collect thermal energy from the exhaust gas and convert it into electric energy, without increase in a time to arrival of the exhaust purifying catalyst at an activation temperature thereof.

Abstract: The invention concerns an exhaust gas cooler employed with a tailpipe of a vehicle exhaust system and a method of cooling exhaust gasses before being emitted from the exhaust system into the atmosphere. The exhaust gas cooler may include a cooler housing having a substantially cylindrical shape with an open forward edge, an open rearward edge, and an internal diameter that is larger than the external diameter of the tailpipe, and a cooler support attached to and supporting the cooler housing such that the rearward edge of the tailpipe is located within the cooler housing between the forward and rearward edges of the cooler housing.

Abstract: A vehicle has a fuel system operative to chemically reform a fuel gas, a supply unit for supplying the fuel system with the fuel gas, and a gas reservoir provided with a storage volume for an intermediate storage of the fuel gas, the storage volume having a size that is changeable.

Abstract: The exhaust heat recovery system of the invention includes: a thermoelectric conversion element that generates electric energy by thermoelectric conversion using heat of exhaust gas discharged from an engine; and a heat pump including a heat recovery unit that absorbs the heat contained in the exhaust gas through an endothermic reaction using a heating medium, and a heat generation unit which generates heat through an exothermic reaction of the heating medium and which supplies the heat to the thermoelectric conversion element. With this configuration, the thermoelectric conversion element and the heat generation unit are movably attached to each other such that they can be placed in contact with and separated from each other, and the heat recovery unit is positioned in an exhaust gas passage in an exhaust gas downstream flow direction from the heat generation unit.

Abstract: A combined EGR cooler and non-thermal plasma device has first and second fluid passageways which are in heat exchange communication with one another. One or more electrodes are located in the second fluid passageway. The electrodes are connected to a voltage source. When a voltage of sufficient magnitude is applied to the electrodes, a non-thermal plasma is generated in the second fluid passageway. The device can be constructed in the form of a shell-and-tube heat exchanger or a stacked-tube type heat exchanger, wherein the electrodes extend through the heat exchange tubes. Hot exhaust gases preferably flow through the tubes in heat exchange contact with a liquid coolant, thereby cooling the exhaust gases. The electrodes generate non-thermal plasma inside the tubes, converting at least a portion of the NO in the exhaust to NO2, which reacts with soot in the exhaust gases to generate CO2 and N2, thereby cleaning the exhaust gases.

Abstract: An exhaust system for an engine is disclosed. The exhaust system may have a NOx reducer located to receive exhaust from the engine, and a bypass circuit configured to selectively pass supercharged air to the NOx reducer. The exhaust system may also have a valve disposed within the bypass circuit to regulate the flow of supercharged air, and a controller in communication with the valve. The controller may be configured to move the valve to pass the supercharged air and cool the exhaust received by the NOx reducer. The controller may also be configured to move the valve to reduce the passing of the supercharged air and remove sulfur compounds from the NOx reducer.

Abstract: Air flowing through a secondary air inducting conduit of a motorcycle is effectively cooled to enhance combustion efficiency of exhaust gas in a catalyzer. A part of the secondary air inducting conduit is exposed to a space behind a front wheel and in front of an engine, and thus acts as a secondary air cooling conduit section for cooling down secondary air flowing through the secondary air inducting conduit.

Abstract: A method and a device for operating an internal combustion engine having a catalytic converter are described making it possible to heat the catalytic converter more quickly. An additional load of the internal combustion engine is applied to heat the catalytic converter.

Abstract: A shield device for an exhaust pipe includes a socket, a shield board and a fastening device. The socket defines a connecting portion extending crookedly downwards from two ends thereof The socket is attached onto the exhaust pipe by the connecting portion. A shield board defines a shield piece and a plug. A fastening portion extends backwards from the shield piece. The plug is set on the inside wall of the shield piece, and the fastening device is set on the fastening portion of the shield piece. The shield board is attached onto the exhaust pipe by inserting the plug into the socket and fixing the fastening device onto the exhaust pipe. The shield device is easily assembled, its appearance is attractive, and the shield device and the exhaust pipe are integrated together stably. The shield device isn't prone to shaking, noise is reduced, and its life-span is protracted.

Abstract: The invention concerns an exhaust gas cooler employed with a tailpipe of a vehicle exhaust system and a method of cooling exhaust gasses before being emitted from the exhaust system into the atmosphere. The exhaust gas cooler may include a cooler housing having a substantially cylindrical shape with an open forward edge, an open rearward edge, and an internal diameter that is larger than the external diameter of the tailpipe, and a cooler support attached to and supporting the cooler housing such that the rearward edge of the tailpipe is located within the cooler housing between the forward and rearward edges of the cooler housing.

Abstract: A method and apparatus for removing contaminant emissions from the exhaust stream of a combustion device, comprising increasing the dew point of the exhaust gases; reducing the velocity of the exhaust stream; reducing the temperature of the exhaust stream such that a part of the gases in the exhaust stream are condensed into liquid form, such that the liquid traps particles and noxious gases from the exhaust stream yielding a liquid extraction stream and a residual gaseous exhaust stream; and collecting the extraction stream.

Abstract: A marine engine has an exhaust system including a catalyst cooled by a flow of coolant, a coolant injector that injects coolant into the flow of exhaust at a point downstream of the catalyst, and a sensor arranged to sense a characteristic of the flow of exhaust, such as oxygen or carbon monoxide level. The engine controller is configured to control an air/fuel ratio of the engine as a function of the sensed exhaust flow characteristic.

Abstract: A heating system for use on an exhaust system having an exhaust gas passageway, the engine having a cooling system to circulate a cooling fluid to and from the engine, includes a fuel-dosing member for dosing fuel to the exhaust system to trigger a regeneration event. A particulate filter is located on the exhaust gas passageway downstream of the engine, and an oxidation catalyst member is located upstream from the particulate filter. The oxidation catalyst member oxidizes the fuel dosed to increase the temperature of the exhaust gases. The increased temperature causes a regeneration event at the particulate filter, which further increases the temperature of the exhaust gases. A heat exchanger is located downstream of the particulate filter for capturing heat from the exhaust gases. The heat exchanger has an inlet conduit and an outlet conduit for circulating the cooling fluid from the heat exchanger to the engine cooling system.

Abstract: A turbine temperature control (TTC) system for regulating operation of an engine to control a temperature of a forced air induction device. The system includes a sensor that is responsive to an exhaust gas temperature and that generates a signal. A control module determines a temperature based on the temperature signal and compares the temperature to a threshold temperature. The control module regulates operation of the engine to decrease the temperature when the temperature exceeds the threshold temperature.

Abstract: A combined EGR cooler and non-thermal plasma device has first and second fluid passageways which are in heat exchange communication with one another. One or more electrodes are located in the second fluid passageway. The electrodes are connected to a voltage source. When a voltage of sufficient magnitude is applied to the electrodes, a non-thermal plasma is generated in the second fluid passageway. The device can be constructed in the form of a shell-and-tube heat exchanger or a stacked-tube type heat exchanger, wherein the electrodes extend through the heat exchange tubes. Hot exhaust gases preferably flow through the tubes in heat exchange contact with a liquid coolant, thereby cooling the exhaust gases. The electrodes generate non-thermal plasma inside the tubes, converting at least a portion of the NO in the exhaust to NO2, which reacts with soot in the exhaust gases to generate CO2 and N2, thereby cleaning the exhaust gases.

Abstract: An emissions control system utilizes otherwise wasted heat to efficiently reduce emissions in a main exhaust flow. Heat stored in exhaust from an auxiliary generator (i.e., auxiliary exhaust) may be used to convert urea to ammonia used by a Selective Catalytic Reducer (SCR) system, and/or the auxiliary exhaust may be used to heat the main exhaust flow before entry into an SCR. Additionally, a heat exchanger may be used to transfer heat from a hot clean flow out of the SCR, to the main exhaust flow entering the SCR. Previously, mobile emissions control systems have not used SCR systems to reduce NOx because of the cost and space required for heater fuel. The efficient use of otherwise wasted heat reduces fuel cost and fuel storage requirements, and thereby makes an SCR systems feasible for use in mobile emissions control systems.

Abstract: Exhaust after-treatment system for the reduction of particulate, NOx, HC, CO, VOCs, nano-particle count and sulfur dioxide from diesel exhaust. System employs diesel oxidation catalyst, exhaust cooling system, particulate converter, soot collection chamber, soot processing drum, EGR and water scrubber.

Abstract: An exhaust-heat recovery system includes a catalytic converter, an exhaust heat exchanger, an air conditioner and an engine controller. The catalytic converter is such that exhaust discharged from an engine passes therethrough and combustible components in the exhaust are catalytically burned therein. The exhaust heat exchanger induces heat exchange between the exhaust having passed through the catalytic converter and a coolant having passed through the engine. The air conditioner generates a heating wind by means of the heat exchange between the coolant having passed through the exhaust heat exchanger and an air conditioning wind. The engine controller controls incrementally the combustible components in the exhaust to be burned in the catalytic converter when a prescribed heating condition is unsatisfied.

Abstract: An engine blowby injection system including a blowby passage, and a blowby injector with a blowby flow outlet sized to inject the blowby flow into an exhaust gas flow generated by an internal combustion engine. The blowby injector includes a cooling mechanism for cooling the blowby flow outlet to reduce the likelihood of carboning. In one embodiment, the blowby injector includes an adapter, an injector body including an injector nozzle with the blowby flow outlet, and a flow passage that allows cooling air to flow therethrough. A method of injecting blowby flow from an internal combustion engine is also provided.

Abstract: An exhaust-gas cleaning system for cleaning the exhaust gas of an internal combustion engine with self ignition and/or with direct fuel injection has at least one oxidizing catalytic converter, disposed in an exhaust conduit of the engine, and has at least one device, disposed downstream of the oxidizing catalytic converter for the selective catalytic reduction of the exhaust gases. A delivery device integrated with the at least one oxidizing catalytic converter delivers a reducing agent into the exhaust-gas stream of the engine. A corresponding method for cleaning the exhaust gases of an internal combustion engine is also disclosed.

Abstract: A system is described for improving engine and vehicle performance by considering the effects of exhaust conditions on catalyst particle growth. Specifically, engine operation is adjusted to reduce operating in such conditions, and a diagnostic routine is described for determining the effects of any operation that can cause such particle growth. Further, routines are described for controlling various vehicle conditions, such as deceleration fuel shut-off, to reduce effects of the particle growth on emission performance.

Abstract: The present invention relates to a device (1) for introducing fuel into an exhaust line (4) of an internal combustion engine, in particular in a motor vehicle, with a fuel injector (2) for injecting fuel under injection pressure into the exhaust line (4) through a radial opening (5) in a pipe section (3) of the exhaust line (4). To improve the efficiency of such a device (1), the fuel injector (2) is connected to a coolant circulation system (7) in a manner suitable to transfer heat.

Abstract: A method for restricting an excessive temperature rise in an internal combustion engine according to the present invention can provide a technology that enable to restrict an excessive temperature rise of a filter more reliably in an internal combustion engine having the filter provided in the exhaust passage for collecting particulate matter in the exhaust gas. In that method, when the running state of the internal combustion engine becomes idle running during the filter regeneration process, the oxygen concentration in the exhaust gas flowing into the filter is reduced. After that, when the running state of the internal combustion engine shifts from the idle running to a running state with an engine load higher than in the idle running, the oxygen concentration in the exhaust gas flowing into the filter is gradually increased.

Abstract: A method to regulate catalyst temperature by adjusting engine air and fuel amounts. The method provides catalyst temperature regulation while reducing fuel consumption.

Abstract: In a system and method for the reduction of nitrogen oxides in the exhaust of an internal combustion engine, the exhaust line of the internal combustion engine contains a DeNOx catalytic converter, in which the nitrogen oxides are reduced by means of hydrogen that is produced on-board the vehicle. The DeNOx catalytic converter is incorporated into a temperature-controlled heat exchanger, allowing the DeNOx catalytic converter to be operated within a desired temperature range, thereby improving the level of conversion.