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Exhaust gas cooled during recirculation

Subclass of:

123 - Internal-combustion engines

123434000 - CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL)

123568110 - Exhaust gas used with the combustible mixture (e.g., emission control Exhaust Gas Recirculation (EGR) valve)

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DocumentTitleDate
20130042842EXHAUST GAS RECIRCULATION COOLER FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas recirculation cooler for an internal combustion engine is provided. The exhaust gas recirculation cooler includes an external casing with an inlet and an outlet for an exhaust gas flow. A first tube bundle and a second tube bundle, each with an inlet and an outlet for a coolant, are located inside the external casing so that the exhaust gas flow flows through the first tube bundle and the second tube bundle in series. A bypass passage conveys the exhaust gas flow from downstream the first tube bundle to the outlet of the external casing bypassing the second tube bundle. The bypass passage is located inside the external casing between the first tube bundle and the second tube bundle.02-21-2013
20100154758TEMPERATURE CONTROLLED VENTURI FOR USE WITH AN EGR SYSTEM IN AN INTERNAL COMBUSTION ENGINE - An EGR venturi for use in an EGR system of an IC engine includes a body defining a converging inlet section, a throat, and an interior liquid heat exchange chamber adjacent to the throat.06-24-2010
20130025577EXHAUST-GAS COOLING MODULE FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas cooling module for an internal combustion engine includes an exhaust gas recirculation valve comprising an exhaust gas recirculation valve housing having an inlet, an exhaust gas heat exchanger, an exhaust gas non-return valve comprising an exhaust gas non-return valve housing, and two exhaust gas channels. The two exhaust gas channels are arranged in the exhaust gas cooling module so as to separately extend from the inlet of the exhaust gas recirculation valve housing to the exhaust gas non-return valve housing via the exhaust gas heat exchanger.01-31-2013
20130042841EXHAUST GAS RECIRCULATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas recirculation system for an internal combustion engine comprising an exhaust gas recirculation conduit fluidly connecting an exhaust manifold to an intake manifold of the internal combustion engine, first and second exhaust gas coolers located in series in the exhaust gas recirculation conduit, each of the first and second exhaust gas coolers comprising an inlet and an outlet fluidly connected to a first and a second coolant circuit respectively, wherein the second coolant circuit comprises a radiator having a coolant inlet in fluid communication with the coolant outlet of the second exhaust gas cooler, a pump having a coolant inlet in fluid communication with a coolant outlet of the radiator and a coolant outlet in fluid communication with the coolant inlet of the second exhaust gas cooler, and an additional conduit fluidly connecting the coolant outlet of the exhaust cooler.02-21-2013
20100071675FLOW CHANNEL, HEAT EXCHANGER, EXHAUST GAS RECIRCULATION SYSTEM, CHARGE AIR SUPPLY SYSTEM, USE OF A HEAT EXCHANGER - A flow channel for a heat exchanger for exchanging heat between a first fluid and a second fluid. The flow channel comprises a channel cover provided with a space surrounded by an inner side of the channel cover; a plurality of partitions that are arranged on the inner side of the channel cover in the space. The flow channel having, perpendicular to a flow channel axis, a cross-section that can be traversed and embodied for guiding the first fluid in the inner chamber. Thereby an improved transfer of heat is ensured with a more acceptable drop of pressure and a reduced risk of blocking. As a result, a hydraulic diameter in the region of between 1.5 mm and 6 mm, defined as the quadruple of the ratio between the surface of the cross-section that is traversed and the perimeter that can be moistened by the fluid. The invention also relates to a heat exchanger comprising a block having a plurality of flow channels of said type, through which the first fluid flows and fluidically connected by a fluid connection. The invention further relates to a charge-air system, an exhaust gas recycling system and to a use of the heat exchanger.03-25-2010
20130081601GAS DISTRIBUTION MANIFOLD IN THE CYLINDER HEAD OF AN ENGINE, WITH THE RECIRCULATED EXHAUST GAS MIXTURE IN A COUNTER-FLOW TO THE ADMISSION GASES - The invention relates to a gas distribution manifold (04-04-2013
20130074814HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME - An exhaust gas recirculation cooler that includes an inlet tank, an outlet tank, and an exhaust gas flow conduit in fluid communication with the inlet tank and the outlet tank. The exhaust gas flow conduit includes a first end, a second end, a first narrow side, a second narrow side, a first channel adjacent the first narrow side and extending between the first end and the second end, a second channel adjacent the second narrow side and extending between the first end and the second end, and a plurality of third channels located between the first channel and the second channel and extending between the first end and the second end. At least one of the inlet tank and the outlet tank includes a wall that inhibits exhaust gas from flowing through the first channel while allowing exhaust gas flow through the plurality of third channels.03-28-2013
20090188476WORKING-GAS-CIRCULATION-TYPE ENGINE - In an engine 07-30-2009
20100101545INLET SYSTEM FOR AN EGR SYSTEM - An embodiment of the present invention takes the form of a system that may recirculate a portion of the exhaust of at least one turbomachine where it may be mixed with the inlet air and re-enter the turbomachine without affecting reliability and availability of the unit.04-29-2010
20100108041VALVE ARRANGEMENT FOR AN EXHAUST GAS RECIRCULATION DEVICE - The invention relates to a valve arrangement (05-06-2010
20100108042HEAT EXCHANGER, METHOD OF MANUFACTURING THE SAME, AND EGR SYSTEM - The present invention relates to a heat exchanger including a partitioning plate and flow channels of at least two systems which are partitioned by the partitioning plate, in which the partitioning plate is made of a clad sheet having a base material made of stainless steel or a nickel-based alloy, and a clad layer having brazing properties and corrosion resistance to a corrosive fluid, an entire surface of the base material which is exposed to the flow channel of at least one system being coated by the clad layer. According to the present invention, the heat exchanger, in which the corrosive fluid flows, can be reduced in size, and the performance thereof can be enhanced. Furthermore, it is possible to simplify the manufacturing process of the heat exchanger.05-06-2010
20090120418Internal-Combustion Engine Having a Cooled Exhaust Gas Recirculation System as Well as an Exhaust Gas Manifold - An internal-combustion engine contains at least one piston/cylinder unit containing a combustion chamber, having an intake path leading into the combustion chamber, an exhaust gas path leading out of the combustion chamber, and having an exhaust gas manifold. An exhaust gas recirculation path leads from the exhaust gas manifold into the intake path. A cooling device is provided for cooling the recirculated exhaust gas, wherein the cooling device cools the exhaust gas manifold, and the exhaust gas recirculation path branches off the cooled exhaust gas manifold.05-14-2009
20090120417Exhaust Gas Re-Circulation Apparatus For Internal Combustion Engine - In an exhaust gas re-circulation apparatus for an internal combustion engine (05-14-2009
20130087127Power System Comprising An Air Cooled HT EGR Cooler And LT EGR Cooler - Disclosed is a power system comprising an internal combustion engine. A fan is associated with the engine and configured for providing an air flow. The power system further comprises an EGR system having an air cooled, HT EGR cooler configured for cooling recirculated exhaust gas, wherein the HT EGR cooler is positioned downstream of the internal combustion engine. The HT EGR cooler is further positioned such that the air flow travels across the outside of the HT EGR cooler. The EGR system further comprises an air cooled, LT EGR cooler is configured for further cooling at least a portion of the recirculated exhaust gas, wherein the LT EGR cooler is positioned downstream of the HT EGR cooler. The LT EGR cooler is further positioned such that the air flow travels across the outside of the LT EGR cooler.04-11-2013
20130055991EXHAUST GAS RECIRCULATION SYSTEM HAVING ACTIVE MATERIAL ACTUATED BY-PASS - An exhaust gas recirculation system adapted for use by an internal combustion engine, and for selectively diverting a recirculated portion of the engine exhaust away from the EGR cooler, includes a by-pass conduit and/or feed line shiftable between open and closed conditions, and an active material actuator.03-07-2013
20090056682EGR cooler bypass switching system - An EGR cooler bypass switching system integrally comprises an EGR cooler for cooling EGR gas and a switching valve for switching between introduction and non-introduction of the EGR gas with respect to the EGR cooler. The system further comprises a cooler core through which the EGR gas introduced in the EGR cooler passes; a cooler case housing the cooler core; a cooling water inlet pipe through which cooling water flows in the system; a cooling water outlet pipe which is provided in the cooler case and through which the cooling water flows out of the system; an in-cooler cooling water passage formed in the cooler case to allow the cooling water flowing therein through the cooling water inlet pipe to flow around an outer periphery of the cooler core; and an in-valve cooling water passage formed in a housing of the switching valve to allow the cooling water flowing therein from the cooling water inlet pipe to flow through for cooling the switching valve. The in-cooler cooling water passage and the in-valve cooling water passage communicate with each other at a mating face between the EGR cooler and the switching valve.03-05-2009
20110011376EXHAUST GAS RECIRCULATION SYSTEM AND METHOD OF OPERATING THE SAME - The present invention provides an exhaust gas recirculation cooler for transferring heat from engine exhaust to coolant including a pair of spaced apart headers, a tube body extending between the pair of headers and positioned along a flow path for the coolant and at least partially defining a flow path for the engine exhaust along a length of the tube between the pair of headers, and a corrugated insert supported in an interior of the tube and having a height in a direction of a plurality of corrugations and a width between about 8.6 and about 13.5 times the height. The width can be substantially perpendicular to the length of the tube and can be substantially perpendicular to the height of the insert.01-20-2011
20090007891Device For Distributing Recirculated Gases, Device For Cooling Recirculated Gases And Method Of Recirculating Exhaust Gases - A device for distributing recirculated gases to a component of an exhaust gas recirculation system. The device includes an inlet and an outlet for recirculated gases, an inlet port and an outlet port to the component, and a mechanism to reverse the stream of recirculated gases flowing through the component. A device for cooling recirculated exhaust gases is equipped with a mechanism to reverse the stream of recirculated gases inside the exchanger. A method of recirculating exhaust gases includes cleaning the EGR system, which is triggered by an electronic unit, and which includes reversing the stream of EGR gases flowing through an EGR cooling device.01-08-2009
20100089370EXHAUST GAS RECIRCULATION SYSTEM - An actuator includes an electric motor and a drive force transmitting mechanism. The drive force transmitting mechanism includes a rotary gear and a rotary cam. The rotary gear transmits a drive force of the electric motor to an EGR valve to drive the same. The rotary cam transmits the drive force of the electric motor to a mode change valve to drive the same. The rotary cam is releasably linkable to the rotary gear to receive the drive force of the electric motor through the rotary gear.04-15-2010
20130206120EGR COOLING STRUCTURE - An EGR cooling structure is provided. The EGR cooling structure (08-15-2013
20080289611Exhaust gas recirculation cooler bypass cartridge - A bypass valve cartridge (11-27-2008
20110120431Exhaust Gas Recirculation Valve Actuator - An EGR system for an engine that includes an exhaust gas recirculation conduit in fluid communication with an exhaust line and an intake port is provided. A cooler is fluidly positioned along the exhaust gas recirculation conduit and in fluid communication with the exhaust line and the intake port. A valve is fluidly positioned along the exhaust gas recirculation conduit and in fluid communication with the exhaust line and the intake port. The valve includes an electronic solenoid controlled hydraulic actuator operable to control the valve, and the actuator includes a position feedback sensor to detect a position of the valve.05-26-2011
20110120430SELF-COOLING EXHAUST GAS RECIRCULATION DEVICE FOR AN INTERNAL COMBUSTION ENGINE - A self-cooling exhaust gas injection device making it possible to inject heated gases, for example recycled exhaust gases from an internal combustion engine, into the air intake distributor of this engine, characterized in that it comprises a return pipe for the exhaust gases (05-26-2011
20110271937HEAT EXCHANGER METHOD AND APPARATUS FOR ENGINE EXHAUST GASES - A heat exchanger device for an exhaust gas recirculation system of an internal combustion engine includes a heat exchange device including a first surface and a second surface. The first surface is in fluid contact with a recirculated portion of exhaust gas flowing in an exhaust system and the second surface is in fluid contact with a second fluid. The first surface is subjected to a surface treatment effective to reduce adhesive properties that relate to surface tension of particulate matter that precipitates from the recirculated portion of the exhaust gas.11-10-2011
20110283978INTERNAL COMBUSTION ENGINE WITH A FIRST AND SECOND COOLING SYSTEM - A cooling structure for cooling a liquid-cooled internal combustion engine is provided where the engine includes an EGR passage interposed between an exhaust manifold structure and an inlet manifold structure of the engine. The cooling structure includes a first cooling system and a second cooling system. The first cooling system includes at least one radiator and a liquid coolant circulatable through the radiator and the internal combustion engine for cooling the internal combustion engine. A flywheel housing for the internal combustion engine is provided with at least a portion of the second cooling system.11-24-2011
20100170483FILM RESISTOR IN AN EXHAUST-GAS PIPE - The invention relates to the arrangement of a film resistor (chip) in an exhaust-gas pipe or exhaust-gas recirculation pipe, wherein the film resistor is fixed in a carrier, which is sealed against a shield or a housing, wherein this shield or housing is connected tightly to the exhaust-gas pipe or exhaust-gas recirculation pipe, wherein the carrier and the shield or the housing are sealed against each other spaced apart from the exhaust-gas pipe or exhaust-gas recirculation pipe radially outside of this pipe.07-08-2010
20100170482INTEGRATED COVER AND EXHAUST GAS RECIRCULATION COOLER FOR INTERNAL COMBUSTION ENGINE - An integrated engine cover and exhaust gas recirculation cooler for an internal combustion engine includes a cover for enclosing a portion of an engine and an EGR cooler having a housing formed as one piece with the cover. The EGR cooler includes at least one cooler section located within the housing and EGR and bypass valves for controlling the flow of exhaust gases either though the cooler or around the cooler.07-08-2010
20100037872PREVENTING EGR SYSTEM SOOT CONTAMINATION - A diesel engine system is provided with an exhaust passage having a diesel particulate filter disposed in the passage. An exhaust gas recirculation passage is connected to the exhaust passage at a downstream location of the diesel particulate filter and in communication with the air intake passage. By locating the connection to the exhaust passage at a location downstream from the diesel particulate filter, the exhaust gas recirculation passage and the exhaust gas recirculation cooler disposed therein are isolated from soot contamination.02-18-2010
20090277429SYSTEM, KIT, AND METHOD FOR LOCOMOTIVE EXHAUST GAS RECIRCULATION COOLING - A system, kit, and service method for exhaust gas recirculation cooling are described. In one example, a removable cooling system for an engine, the engine in a vehicle car body, the system comprising: a removable package including a first exhaust gas recirculation cooler, a second exhaust gas recirculation cooler, and a third exhaust gas recirculation cooler, the first, second, and third coolers coupled together in series, where the removable package is located at a top of the vehicle car body and where the removable package is removably coupled to the vehicle as a unit.11-12-2009
20100126478Switching valve for EGR cooler - A switching valve comprises a housing, a gas inflow chamber, a first passage adjacent to the inflow chamber through a first partition wall and communicating with the EGR cooler, a first communication hole providing communication between the inflow chamber and the first passage, a gas outflow passage, a second passage communicating with the outflow passage and adjacent to the inflow chamber through the second partition wall and communicating with the EGR cooler, a second communication hole formed in the second partition wall and providing communication between the inflow chamber and the second passage, and a third partition wall dividing the first passage from the second passage. The first to third partition walls are continuous at a joined portion in a Y-shaped cross section. A valve element is placed to be swingable about a point near the joined portion between the first and second partition walls. The first and second partition walls are slanted with respect to a mold-removing direction to form the inflow chamber and the third partition wall is parallel to a mold-removing direction to form the first and second passages.05-27-2010
20110168142TWO-STAGE COOLED EXHAUST GAS RECIRCULATION SYSTEM - A device for cooled recirculation of exhaust gas of an internal combustion engine charged with the aid of an exhaust gas turbocharger, the internal combustion engine having a fresh gas system and an exhaust gas system, which are connected to a two-stage exhaust gas cooler via an exhaust gas recirculation line. A device by way of which a sufficient amount of exhaust gas may be recirculated by simple means is provided. This is achieved in that exhaust gas recirculation line 07-14-2011
20090277428LOCOMOTIVE EXHAUST GAS RECIRCULATION COOLING - A method of operating an engine having exhaust gas recirculation from an exhaust manifold of the engine to an intake manifold of the engine, the engine in a locomotive or other vehicle car body, the engine further having an intake system turbocharger with an air-cooled intercooler, the method including cooling the exhaust gas recirculation via a first airflow generated by car body motion, cooling compressed engine induction air in the air-cooled intercooler via a second airflow, and cooling the exhaust gas recirculation via the second airflow.11-12-2009
20100275892PETROL ENGINE HAVING A LOW-PRESSURE EGR CIRCUIT - Internal combustion petrol engine comprising an engine block (11-04-2010
20100095941INTERNAL COMBUSTION ENGINE COMPRISING AN EXHAUST GAS RECIRCULATION SYSTEM - This internal combustion engine includes a plurality of cylinders, an air intake line, and an exhaust line. The internal combustion engine also includes a turbocharging system having at least one compressor stage and intake air cooling arrangement having at least one charge air cooler located upstream from the intake manifold. The internal combustion engine further includes an exhaust gas recirculation (EGR) line rerouting a portion of the engine's exhaust gas into the air intake line at a point located upstream from the at least one charge air cooler. This engine therefore uses an heat exchanger to cool the EGR gas. Thus, EGR gas mixed with intake air flows through at least one change air cooler before entering the engine cylinders. The efficiency of this cooler—generally of the air/water type—makes it possible to significantly decrease the EGR gas temperature before it enters the cylinders. Less cooling power from the engine cooling system is required to cool down the EGR gas as fresh intake air is used as a cooling medium in the heat exchanger.04-22-2010
20120090584APPARATUS AND METHOD FOR CONTROLLING LOW PRESSURE EXHAUST GAS RECIRCULATION SYSTEM - An apparatus and a method for controlling a low pressure exhaust gas recirculation system has advantages including minimizing condensate water generation in an intercooler and a low pressure EGR cooler by controlling EGR gas amount through optimally mapping many control variables influencing direct factors instead of controlling the EGR gas amount according to direct factors.04-19-2012
20110005503Exhaust gas recirculation valve contaminant removal - An exhaust gas recirculation system including an exhaust gas passageway which routes a flow of exhaust gas from an exhaust gas source to an intake manifold; an exhaust gas passageway valve which controls flow to the intake manifold; a cooling system coupled with the exhaust gas passageway positioned at a location upstream of the exhaust gas source and downstream of the intake manifold and operable to transfer heat from the flow of exhaust gas to a coolant in flow communication with the cooling system; a bypass passageway coupled with the exhaust gas passageway and bypassing the cooling system; a bypass valve operable to control flow through the bypass passageway; at least one valve operation sensor; and a controller operable to control the bypass valve to direct the flow of exhaust gas to the bypass passageway during exhaust gas recirculation based on a signal from the valve operation sensor.01-13-2011
20080245348Method for Recirculating a Partial Exhaust Gas Flow to an Internal Combustion Engine of a Motor Vehicle - In the present method, a partial flow is guided through a partial flow line connected downstream of an exhaust gas outlet of an internal combustion engine, and is immediately thereafter supplied to an internal combustion engine either via a first valve, a bypass line which is connected directly downstream and a recirculation line. Alternatively, the partial exhaust gas flow can be supplied to the internal combustion engine via a second valve, a radiator which is connected directly downstream and a recirculation line. The first valve and the second valve are opened or closed as a function of the exhaust gas conditions, this being monitored by a sensor. A device for carrying out the method is also disclosed.10-09-2008
20090188477EXHAUST GAS RECIRCULATION DEVICE - The invention relates to an exhaust gas recirculation device (07-30-2009
20090025698Internal combustion engine and method for operating an internal combustion engine - The invention relates to a method for operating an internal combustion engine, in which the exhaust gas generated by the internal combustion engine is returned to the internal combustion engine by means of an exhaust gas recirculation device having at least two cooling devices which are each associated with a bypass, the exhaust gas being cooled in the exhaust gas recirculation device as a function of the load state of the internal combustion engine. The operation of the internal combustion engine is divided into at least four load states, and as a function of the instantaneous load state the exhaust gas is returned to the internal combustion engine via a flow path in the exhaust gas recirculation device specifically assigned to this load state. The invention further relates to an internal combustion engine having an exhaust gas recirculation device.01-29-2009
20090139501Exhaust-Gas Recirculation in an Air-Cooled Internal Combustion Engine - An internal combustion engine includes a crankcase and a cylinder head which covers a cylinder of the crankcase and in which a fresh-gas channel and an exhaust-gas channel are made which open on a cylinder-head longitudinal side and are connected to in each case a fresh-gas line and an exhaust-gas collection line, and wherein there is an exhaust-gas recirculation system, including an exhaust-gas recirculation line and a control valve. An internal combustion engine having an exhaust-gas recirculation system is provided, in which the exhaust-gas recirculation system remains uninfluenced by the exhaust-gas collection line which is hot during operation. This is achieved in that the exhaust-gas recirculation system is arranged on that cylinder-head side which lies opposite the fresh-gas line and the exhaust-gas collection line. This arrangement away from the exhaust-gas collection line which is substantially hotter than other components during operation has the consequence of a direct reduction of the temperature of the recirculated exhaust-gas amount, without further special cooling measures being provided.06-04-2009
20090139502EXHAUST GAS RECIRCULATION SYSTEM TECHNICAL FIELD - An exhaust gas recirculation system having at least one cooler with a housing and at least one valve with a pivotably actuated valve member on an inlet side is characterized in that an actuator for the valve is mounted to the housing of the cooler, which is connected to the valve via at least one lever and at least one connection member such as a coupling rod, a ball-and-socket joint being provided between at least one lever and at least one connection member such as a coupling rod.06-04-2009
20090139500EXHAUST GAS RECIRCULATION SYSTEM - An exhaust gas recirculation system for reducing emissions which includes an exhaust portion having an outlet housing for collecting exhaust gas from an exhaust manifold of an internal combustion engine. The system also includes an intake portion having an inlet housing for introducing air into an intake manifold of an engine. The system also includes a fluid conduit for transporting exhaust gases from the exhaust portion to the intake portion. The conduit includes a first end and a second end. The first end is connected to the outlet housing with a slip joint and the second end is connected to the inlet housing with a slip joint, without the need for intermediate bracing. The system includes a plurality of sealing members for sealing the system and allowing for thermal expansion. The sealing members connect the first end to the outlet housing and connect the second end to the inlet housing.06-04-2009
20090013978Integrated Charge Air and Egr Valve - An engine assembly (01-15-2009
20110139133COOLED EGR SYSTEM FOR COOLANT HEATING DURING COLD ENGINE START - Various systems and method for heating an engine in a vehicle during a cold start are described. In one example, thermal efficiency of the engine is improved by heating engine coolant via a high-pressure exhaust gas recirculation (HP-EGR) system. For example, after light-off of an exhaust catalyst, exhaust gas is routed through the HP-EGR system which includes a HP-EGR cooler. Heat from the exhaust gas is then used to warm the engine coolant via the HP-EGR cooler. One or more engine operating parameters are adjusted in response to the HP-EGR entering the engine during the cold start in order to maintain combustion stability.06-16-2011
20090250041Device for purifying exhaust gas of a diesel engine - A device for purifying exhaust gas of a diesel engine is equipped with a continuously regenerating diesel particulate filter (DPF) that uses a catalyst. A second continuously regenerating DPF of a small capacity is disposed in a by-path that by-passes the exhaust gas passage of the diesel engine equipped with the continuously regenerating DPF. The particulate matter (PM) is trapped by the second continuously regenerating DPF in the region of low exhaust gas temperatures. A homogeneous charge compression ignition is executed by advancing the timing for injecting the fuel into the cylinders to reduce the formation of PM. Therefore, the PM can be trapped to a sufficient degree despite the second continuously regenerating DPF has a small capacity. To suppress the formation of NOx, further, the cooled exhaust gas is recirculated into the cylinders and, besides, a urea-added SCR catalyst is disposed in the exhaust gas passage to reduce and decompose NOx in the exhaust gas to further reduce NOx.10-08-2009
20090260604Three-Pass Heat Exchanger for an EGR System - The present invention relates to a three-pass heat exchanger for an EGR system, comprising a casing housing at least one cooling chamber for gas circulating through a plurality of pipes and heads on its ends coupled to the gas inlet pipe coming from the exhaust manifold and to the gas outlet pipe connected to the intake manifold of the engine, which is configured as a three-pass heat exchanger, i.e. with three differentiated areas for gas circulation from the inlet pipe to the outlet pipe, the inlet pipe and the outlet pipe being located at opposite ends of the exchanger. The exchanger can include a bypass valve and two cooling chambers at different temperatures.10-22-2009
20090260605STAGED ARRANGEMENT OF EGR COOLERS TO OPTIMIZE PERFORMANCE - A compression ignition engine comprising at least one combustion chamber, an air intake system, a fuel system, an exhaust system and an exhaust gas recirculation system. The air intake system conveys air to the chamber. The exhaust system conveys exhaust gases from the combustion chamber. The exhaust gas recirculation system is capable of recirculating a portion of the exhaust gases into air intake system. The exhaust gas recirculation system comprises a cooler package and a valve. The valve controls the amount of air flow through the cooler package. The cooler package includes a first portion, a second portion and a control valve. The control valve of the cooler package is configured to control whether the air that flows through the cooler package flows only through one of the first or the second portion or through both of the first portion and the second portion in parallel.10-22-2009
20100147272EXHAUST GAS RECIRCULATION COOLER COOLANT PLUMBING CONFIGURATION - A cooling system for an engine is disclosed. In a first embodiment, the cooling system may comprise a heat exchanger, a pump coupled to the heat exchanger, an EGR cooler coupled to the pump, and a first valve coupled to the EGR cooler and the heat exchanger. When the first valve is in a first position, the first valve directs a coolant to the heat exchanger and when the first valve is in a second position, the heat exchanger is bypassed and coolant flows directly to the pump. It is an advantage for a cooling system to utilize a valve to maximize the rate a coolant flows throughout the system when the valve is in an open position and also to warm up an engine when the valve is in a closed position.06-17-2010
20090090336INTERNAL COMBUSTION ENGINE AND EGR HEAT EXCHANGER FOR IT - Internal combustion engine wherein a cooling medium inlet of an EGR (Exhaust Gas Recirculation) heat exchanger is fluidly connected to a turbine outlet of a turbocharger so as to use the exhaust gas outputted by the turbine as a coolant.04-09-2009
20130213368EXHAUST GAS HEAT EXCHANGER WITH AN OSCILLATION ATTENUATED BUNDLE OF EXCHANGER TUBES - A heat exchanger is disclosed for the exhaust gas train of a motor vehicle. The heat exchanger includes a bundle of separately formed exhaust gas carrying exchanger tubes that is disposed in a closed housing formed separately, a coolant flowing through the housing and around the outside of the exchanger tubes. A bandage is disposed on the bundle of exchanger tubes mechanically connecting a plurality of the exchanger tubes to militate against an oscillation of the exchanger tubes.08-22-2013
20090314266EGR device - An EGR device includes a first cooling passage that introduces a flowing medium discharged from an engine 12-24-2009
20090314265Heat Exchanger with Variable Turbulence Generators - An exhaust gas recirculation cooler may include a housing and a first wall. The housing may include an exhaust gas region, a coolant region, an exhaust gas inlet, and an exhaust gas outlet. The first wall may be fixed within the housing and may separate the exhaust gas region from the coolant region. The first wall may include a first region facing the exhaust gas region and a first tab having a fixed end coupled to the first region and a free end generally opposite the fixed end. The free end may be displaceable between first and second positions based on an operating temperature of the exhaust gas. The free end may be displaced in a direction generally perpendicular to the first region when in the second position.12-24-2009
20100242929ARRANGEMENT AND METHOD FOR THE RETURN OF EXHAUST GASES IN A COMBUSTION ENGINE - An arrangement and a method for recirculation of exhaust gases of a combustion engine. A return line returns exhaust gases to the combustion engine. An EGR cooler device cools the exhaust gases before the gases are led to the combustion engine. A container gathers condensate which forms in the EGR cooler device. A line connects the container to a flow section for the exhaust gases in the EGR cooler device. A driver leads condensate from the container into the flow section for the exhaust gases in the EGR cooler device.09-30-2010
20120125300VORTEX EXHAUST RECOVERY SYSTEM HAVING IMPROVED MUFFLER - An exhaust recovery system for use with an internal combustion engine having an air intake device connected to an air/fuel mixing device. The system comprises an improved muffler having a vortex inducing filter mechanism inside the muffler chamber that facilitates separation of engine exhaust air into cool and hot gas streams and encloses a filter element that filters out particulate matter and other pollutants. Engine exhaust air is circumferentially discharged into the muffler chamber and a cone member is disposed inside the chamber to separate and direct the gas streams. The cooled gas stream is redirected to the air intake device through an outlet pipe at the first end of the muffler so pressurized cooled air is directed into the air/fuel mixing device to improve engine performance and efficiency. The filtered hot gas stream is discharged to the environment out a discharge pipe at the second end of the muffler.05-24-2012
20100242928Device and Method for Neutralizing Acidic Condensate in a Motor Vehicle - Disclosed is a device and a method for neutralizing an acidic condensate in an internal combustion engine with exhaust gas recirculation system, wherein the exhaust gas recirculation system has an exhaust gas recirculation cooler for cooling a hot exhaust gas stream, a metering system is provided that meters an alkaline substance into the exhaust gas stream and is arranged upstream of the exhaust gas recirculation cooler.09-30-2010
20100139631HEAT EXCHANGER - The invention relates to a heat exchanger with at least one duct, which can be flowed through by flowing medium from an inlet cross-section to an outlet cross-section, has an inside and outside, and which comprises, on the inside, structural elements for increasing the transfer of heat. The invention provides that the structural elements (06-10-2010
20110108013EXHAUST GAS RECIRCULATION VALVE WITH BYPASS CAPABILITY AND METHOD - Unique to this invention is the design of an Exhaust Gas Recirculation (EGR) valve with bypass capabilities. EGR valves combined with a bypass valve are expensive to design and manufacture due to their complexity and unique differences. Furthermore, the reliability of multiple components is much lower than that of the single component. During various engine operating conditions it is necessary to divert the flow of exhaust gas around the EGR cooler through the intake manifold or through the EGR cooler to lower the temperature of the exhaust gas to reduce noxious emissions. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.05-12-2011
20110100342FORCED CONVECTION EGR COOLING SYSTEM - A method of cooling recirculated exhaust gas from an exhaust manifold (05-05-2011
20080271721Arrangement and a Method for Recirculation of Exhaust Gases of an Internal Combustion Engine - An arrangement and a method for recirculation of exhaust gases of a combustion engine. A return line extends from an exhaust line for engine exhaust gases to an inlet line for air to the combustion engine. An EGR valve in the exhaust line regulates the amount of exhaust gases led through the return line. A control unit controls the EGR valve. An EGR cooler cools the exhaust gases in the return line by means of a cooling system of the combustion engine. The control unit decides whether the coolant in the cooling system is at a too low a temperature and, if it is, controls the EGR valve so that a larger amount of exhaust gases is led through the return line with extra heating.11-06-2008
20110023843EXHAUST GAS RECIRCULATION COOLER - An exhaust gas recirculation assembly for an engine is disclosed in which an EGR cooler 02-03-2011
20110023840Exhaust Gas Cooler - A method of cooling exhaust gas (F) from an engine in an EGR cooler (02-03-2011
20110023842COOLER BYPASS TO REDUCE CONDENSATE IN A LOW-PRESSURE EGR SYSTEM - Various systems and methods are described for an exhaust gas recirculation (EGR) system including an EGR cooler coupled to a turbocharged engine in a vehicle. One example method comprises, under selected operating conditions, controlling a mixture temperature of cooled and uncooled EGR at a mixing location upstream of an intake passage inlet by routing at least a portion of exhaust gas through a bypass around the EGR cooler.02-03-2011
20110023841METHOD FOR OPERATING A COMBUSTION UNIT AND A COMBUSTION UNIT - A method for operating a combustion unit (02-03-2011
20120067332Integrated exhaust gas recirculation and charge cooling system - An exhaust gas recirculation system comprises an exhaust driven turbocharger to deliver a compressed intake charge through an intake charge conduit and to an engine. A compressed intake charge cooler receives, cools and transits the compressed intake charge. A cooling system, independent of the engine cooling system delivers coolant to the compressed intake charge cooler to transfer heat from the compressed intake charge thereto and to a cooler. Exhaust gas conduits extend between the exhaust system of the internal combustion engine, from locations upstream and downstream of the exhaust driven turbocharger, to the intake charge conduit. Exhaust gas coolers receive, cool and transit the exhaust gas.03-22-2012
20090320810INTERNAL COMBUSTION ENGINE SYSTEM, CONTROL METHOD OF INTERNAL COMBUSTION ENGINE SYSTEM, AND VEHICLE - Even under satisfaction of an EGR condition during operation of an engine, when it is determined that the cooling power of a cooling system is less than a preset reference power, based on a cooling water temperature and an outside air temperature, an EGR valve is controlled to prohibit circulation of exhaust into a gas inlet line. The reference power is set as a criterion of assuring a minimum required power for cooling down the engine even when the EGR is performed during the operation of the engine. This arrangement effectively prevents a decrease in cooling power of the cooling system. When it is determined that the cooling power of the cooling system is not less than the preset reference power, the EGR valve is controlled to allow circulation of the exhaust into the gas inlet line with a target EGR amount calculated from an intake air amount. This arrangement ensures the appropriate operation of the engine.12-31-2009
20110083648FLEX Dual Stage EGR Cooling - A circuit for cooling exhaust gas being recirculated through an EGR system (04-14-2011
20110239996ARRANGEMENT FOR COOLING OF RECIRCULATED EXHAUST GASES IN A COMBUSTION ENGINE - An arrangement for recirculation of exhaust gases of a combustion engine (10-06-2011
20090032000Hydrated EGR system, method and apparatus for reducing harmful exhaust emissions and improving fuel economy - A hydrated EGR system, method and apparatus for a vehicle, in which heat from an exhaust pipe is used to heat an aqueous fluid solution in a water tank. A portion of the hot exhaust gas is diverted from the main exhaust flow, and the diverted portion is bubbled through the heated aqueous fluid solution to form a hydrated EGR mixture containing water vapor. The hydrated EGR mixture is then fed back to an intake portion of the engine, is mixed with an incoming fuel/air mixture, and is burned with the fuel air mixture inside the engine. The use of the hydrated EGR mixture, including heated water vapor, as part of the intake charge simultaneously reduces harmful exhaust emissions, improves engine performance, and improves fuel economy of the vehicle.02-05-2009
20090038593Method and device for operating an internal combustion engine - A method and a device for operating an internal combustion engine having at least one mass flow line and a cooling device for cooling the mass flow in the mass flow line, as well as a bypass, having a bypass valve, that bypasses the cooling device. When the bypass valve is opened, the mass flow is conducted at least partly through the bypass. When the bypass valve is closed, the mass flow is conducted through the cooling device. Downstream from the cooling device and from the bypass in the mass flow line, a temperature of the mass flow in the mass flow line is determined. In at least one operating state of the internal combustion engine, a first temporal temperature gradient is determined with closed bypass valve. In the at least one operating state of the internal combustion engine, a second temporal temperature gradient is determined with closed position of the bypass valve. An error is recognized as a function of a deviation between the first temporal temperature gradient and the second temporal temperature gradient.02-12-2009
20110100343EMISSION CONTROL SYSTEM FOR AN ENGINE HAVING A TWO-STAGE TURBOCHARGER - While an engine (05-05-2011
20110048389EMG Temp Signal Model Based On EGRC Out Temp For EGR System Anti-Fouling Protection - An EGR control method to prevent condensation within the EGR system uses a temperature sensor signal from an EGR cooler exhaust gas outlet to model or estimate exhaust manifold gas temperature upstream of the cooler. If the estimated exhaust manifold gas temperature falls below a predetermined level, the engine control system closes or partially closes the EGR control valve to stop EGR flow through the cooler and the EGR valve.03-03-2011
20110146636COOLED EXHAUST GAS RECIRCULATION SYSTEM WITH CYLINDER-LEVEL CONTROL - A cooled exhaust gas recirculation system includes one or more cylinders, each with several valves, an intake manifold, an exhaust manifold and a cooled exhaust gas recirculation chamber. The cooled exhaust gas recirculation chamber removes a portion of the exhaust that exits the cylinders, cools the removed portion of the exhaust, and recirculates the cooled removed portion of the exhaust for reintroduction into the cylinders. The cooled recirculated exhaust is reintroduced directly to the cylinders using a dedicated valve controlled by an electronic control unit.06-23-2011
20100263641Internal Combustion Engine With an Exhaust-Gas Turbocharger and a Charge-Air Cooler and Method for Operating an Internal Combustion Engine - An internal combustion engine includes an intake manifold in a fresh air system. The intake manifold opens into inlet ports of a cylinder head. An exhaust-gas turbocharger has a turbine and a compressor, which is driven by the turbine. The turbine is disposed in the exhaust-gas system. The compressor is disposed in the fresh air system. The turbine has a turbine wheel and a wastegate channel configured to allow a bypassing flow of exhaust-gas past the turbine wheel of the turbine. A wastegate valve is disposed in the wastegate channel for selectively opening and closing the wastegate channel. An electric actuator is provided for operating the wastegate valve. A charge-air cooler is disposed, downstream of the compressor, in the fresh air system. The charge-air cooler is integrated into the intake manifold and is embodied with a water-cooled heat exchanger.10-21-2010
20090308363EXHAUST GAS RECIRCULATION DEVICE AND VEHICLE PROVIDED WITH THE SAME - An exhaust gas recirculation device for an internal combustion engine, a controllable exhaust gas recirculation valve for controlling an exhaust gas flow of the internal combustion engine, an exhaust gas cooler for cooling the exhaust gas flow, and a bypass device which has a bypass pipe arranged parallel with the exhaust gas cooler, by means of which pipe the exhaust gas flow can be fed at least partially past the exhaust gas cooler, and which has a controllable bypass switch which is arranged inside a valve housing of the exhaust gas recirculation valve. The invention also relates to a vehicle.12-17-2009
20090188475EGR DEVICE - An EGR device comprising an EGR passage 07-30-2009
20090126706Exhaust Gas Recirculation Device for Engine - There is provided an exhaust gas recirculation device for an engine, which is capable of reducing the emission of NOx and preventing engine overheat when an engine is operated at low to normal high loads. An intake passage (05-21-2009
20110041816Apparatus and Method for Protecting Against Fouling of an Exhaust Gas Recirculation Valve - This invention relates to a method for protecting an exhaust gas recirculation (EGR) valve from fouling due to hydrocarbon condensation at low EGR cooler outlet exhaust temperatures. In modern internal combustion engines exhaust gas recirculation (EGR) valves provide a means to recirculate exhaust gases into the intake air stream. The EGR valve regulates the flow of exhaust gas entering the stream. The EGR valve can experience fouling due to the condensation of hydrocarbons at low EGR cooler outlet exhaust temperatures. Typically, fouling occurs when the internal combustion engine is operating at relatively low temperatures, namely during low speed and/or low torque operations. The effects of fouling an EGR valve include higher emission levels, reduction in fuel economy, and rough idling.02-24-2011
20110259306HIGH FLOW EGR SYSTEM - A high flow EGR system for an internal combustion engine having a pair of series connected EGR coolers and a water droplet condensation collector and reservoir connected to the gas flow. The reservoir feeds a pump which is actuated to inject the liquid to the engine adjacent each cylinder for uniform distribution of the water to the engine cylinders. The pump is controlled to inject the water at appropriate conditions during the engine operating cycle.10-27-2011
20110030662Gas guide system for a combustion engine, a combustion engine and a method for operating the engine - In a gas guide system, a combustion engine and a method for operating the engine comprising a gas supply arrangement for supplying gas to the engine, a gas discharge system including an exhaust gas treatment unit for releasing gas from the engine, the gas guide system including a first partial gas discharge line for discharging a first partial gas stream from a first fired cylinder group via the exhaust gas treatment unit and a second gas discharge line for discharging a second partial gas stream from a second unfired cylinder group separately from the hot gas stream directed through the exhaust gas treatment unit to keep it at operating temperatures.02-10-2011
20090044790METHOD FOR REINTRODUCING EXHAUST GAS TO THE INTAKE OF AN INTERNAL-COMBUSTION ENGINE AND ENGINE USING SAME - The present invention relates to a method for reintroducing exhaust gas to the intake of an internal-combustion engine wherein, during the engine exhaust phase, part of the exhaust gas contained in combustion chamber (02-19-2009
20090173319Method for operating a spark ignition engine - In a method for operating a spark ignition engine, wherein the inlet valves of the spark ignition engine are closed very early or very late, and a combustion air flow which is supplied to the spark ignition engine is compressed by means of a charger, and, under full load operation, the inlet valves are closed either early or late to avoid knocking of the engine, a partial flow of re-circulated exhaust gas is supplied to the combustion air flow supplied to the engine also during full load engine operation.07-09-2009
20110011377CONSTRUCTION MACHINE - The present invention provides a construction machine, capable of enhancing the cooling efficiency of an air-cooled cooler for EGR without deterioration of the cooling effect of a heat exchanger in spite of the arrangement of the air-cooled cooler for EGR near a cooling fan. The construction machine includes: an EGR line 01-20-2011
20120031381Coordination of HP and LP EGR - A method for charging an intake manifold of an engine comprises adjusting an LP EGR flow rate and an uncooled HP EGR flow rate within first limits to maintain a target dilution level in the intake manifold at steady-state. The method further comprises adjusting the LP EGR and uncooled HP EGR rates within second limits, different from the first, to maintain the target dilution level in the intake manifold during transient conditions.02-09-2012
20120304970Mixing Pipe for Recirculated Exhaust Gas and Air - The present disclosure refers to a mixing pipe for mixing recirculated exhaust gas and air, preferably supplied by a high pressure compressor, and supplying a mixture of the exhaust gas and the air to a plurality of combustion chambers of an internal combustion engine. The mixing pipe may comprise a first mixing pipe section having a mixing pipe inlet and a mixing pipe outlet. The distance between the mixing pipe inlet and the mixing pipe outlet may have a predetermined length, wherein the predetermined length of the first mixing pipe section is configured to achieve a defined mixing ratio of the exhaust gas and the air at the mixing pipe outlet.12-06-2012
20080271722Heat Exchanger for a Combustion Engine - Disclosed is a heat exchanger for a combustion engine, comprising a first connection zone (11-06-2008
20110315130ARRANGEMENT FOR COOLING OF RECIRCULATING EXHAUST GASES OF A COMBUSTION ENGINE - An arrangement for cooling of recirculating exhaust gases of a combustion engine (12-29-2011
20110315129EXHAUST GAS RECIRCULATION DEVICE OF ENGINE - A connecting passage is formed inside a cylinder head, which extends rearward from an exhaust passage and connects to the exhaust passage. The connecting passage branches inside the cylinder head into two branch passages, which open at a rear end face of the cylinder head, respectively. An opening portion, one of opening portions of the branch passages, connects to an EGR cooler, and another opening portion, the other of opening portions of the branch passages, connects to a bypass pipe. Accordingly, the exhaust gas recirculation device of an engine which can restrain the device from being improperly large sized, providing the EGR cooler and the bypass pipe, can be provided.12-29-2011
20090101122Multi-Cooler EGR Cooling - A system is described for coordination of Exhaust Gas Recirculation (EGR) flow through and around a plurality of EGR coolers differently depending on operating conditions.04-23-2009
20110094484MULTI-PORT VALVE04-28-2011
20110094483EXHAUST GAS RECIRCULATION APPARATUS - An exhaust heat recirculation apparatus is capable of improving fuel mileage by heating lubricant using exhaust heat. The exhaust gas recirculation apparatus has a heat exchanger that is mounted at an exhaust line of an engine for heating coolant using the exhaust gas. The exhaust gas recirculation apparatus may include a main line allowing exhaust gas exhausted from each cylinder of the engine to communicate to a exhaust gas inlet, a bypass line communicated to a downstream side of the main line, a bypass valve mounted inside the bypass line, and a heat exchanger selectively communicated to the bypass line by way of the bypass valve.04-28-2011
20110094482EXHAUST GAS RECIRCULATION SYSTEM WITH A NOx SENSOR - Various systems and methods are described for operating an engine system having a sensor coupled to an exhaust gas recirculation system in a motor vehicle. One example method comprises during a first operating condition, directing at least some exhaust gas from an exhaust of the engine through the exhaust gas recirculation system and past the sensor to an intake of the engine and, during a second operating condition, directing at least some fresh air through the exhaust gas recirculation system and past the sensor.04-28-2011
20090277431Internal combustion engine with an exhaust-gas recirculation and method for operating an internal combustion engine - An internal combustion engine has a high-pressure exhaust-gas recirculation line and a low-pressure exhaust-gas recirculation line with a low-pressure exhaust-gas recirculation valve. The low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system downstream of a turbine of an exhaust-gas turbocharger and opens into a fresh-air system upstream of a compressor of the exhaust-gas turbocharger. An exhaust-gas flap is disposed in the exhaust-gas system downstream from where the low-pressure exhaust-gas recirculation line branches off from the exhaust-gas system. At least one pressure sensor is disposed in the low-pressure exhaust-gas recirculation line and configured such that the at least one pressure sensor determines a pressure difference in the low-pressure exhaust-gas recirculation line between a point upstream of the low-pressure exhaust-gas recirculation valve and a point downstream of the low-pressure exhaust-gas recirculation valve. A method for operating an internal combustion engine is also provided.11-12-2009
20110088672EXHAUST HEAT RECOVERY AND EXHAUST GAS RECIRCULATION WITH COMMON HEAT EXCHANGER - An apparatus for a vehicle with an engine is provided that accomplishes exhaust heat recovery and exhaust gas recirculation with a common heat exchanger used for both purposes. The apparatus includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first position to direct the exhaust gas through the heat exchanger to transfer heat to the coolant flow passages in a coolant heating mode, and operable in a second position in which the exhaust gas bypasses the heat exchanger in a bypass mode during which no significant coolant heating occurs via the heat exchanger. A portion of the exhaust gas is recirculated to the engine after cooling via the heat exchanger.04-21-2011
20110088671EXHAUST GAS RECIRCULATION COOLER SYSTEM - An exhaust gas recirculation cooling system for an internal combustion engine that has an exhaust system is provided. The exhaust gas recirculation cooling system comprises a cooling fluid circuit, an exhaust gas recirculation cooler, a turbine, a condenser, and a compressor. The cooling fluid circuit has a quantity of fluid that circulates through the exhaust gas recirculation cooling system and receives heat from the exhaust gas recirculation cooling system. The exhaust gas recirculation cooler is disposed in fluid communication with the exhaust system to receive engine exhaust gas from the engine and to remove heat from the exhaust gas. The exhaust gas recirculation cooler additionally disposed in fluid communication with the cooling fluid circuit. The cooling fluid within the cooling fluid circuit receives heat within the exhaust gas recirculation cooler. The turbine is disposed in fluid communication with the cooling fluid circuit. The turbine converts heat energy within the cooling fluid circuit to mechanical energy. A condenser is disposed in fluid communication with the cooling fluid circuit. The condenser cools fluid within the cooling fluid circuit. The compressor is also disposed in fluid communication with the cooling fluid circuit. The compressor pressurizes the fluid within the cooling fluid circuit and circulates the fluid within the cooling fluid circuit.04-21-2011
20100224173Heat Exchanger with Cast Housing and Method of Making Same - A heat exchanger suitable for cooling exhaust gases and a method of making same are disclosed. The heat exchanger includes an outer casting member having first and second ends and forming a housing and a plurality of channel members forming alternating first and second flow channels for the flow of an exhaust gas through the first flow channels and coolant through the second flow channels. The channel members form a core having first and second ends, this core being mounted in the casting member. A first flange is fixedly attached to a first end of the core so as to form a sealed joint. A second flange is fixedly attached to the second end of the core so as to form another sealed joint. The first and second flanges are each coupled by fasteners to their respective ends of the casting.09-09-2010
20100206275Exhaust gas recirculating system - An exhaust gas recirculation system.08-19-2010
20100199957HIGH-PRESSURE EGR APPARATUS - An EGR control valve is driven by an actuator so as to control EGR amount by changing its opening degree. An EGR cooling device is provided in an EGR passage for cooling down EGR gas. A bypass passage is provided to the EGR passage, so that EGR gas may bypass the EGR cooling device. A switching valve is provided in the EGR passage for switching EGR mode from a hot EGR mode in which the EGR gas flows through the bypass passage to a cold EGR mode in which the EGR gas flows through the EGR cooling device, or vice versa. A converting mechanism is provided between the EGR control valve and the switching valve, so that the switching valve is driven by the actuator from its hot to cold switching position (or vice versa) when the EGR control valve is driven by the same actuator in a small angular range.08-12-2010
20120167862DROP-IN TYPE OF EXHAUST GAS RECIRCULATION VALVE, AND SYSTEM FOR ATTACHING SAME - An attaching system of an exhaust gas recirculation valve includes: an attachment unit 07-05-2012
20100051001Exhaust Gas Recirculation (EGR) System - A method for operating an internal combustion engine Exhaust Gas Recirculation (EGR) system that includes producing an EGR valve position signal to decrease the amount of exhaust gas passed to the EGR cooler when a processor determines the EGR cooler efficiency is less than the predetermined level and producing an EGR coolant valve position signal to decrease the amount of coolant passed to the EGR cooler when such processor determines the EGR cooler efficiency is less than the predetermined level. The processor produced EGR valve and the EGR coolant valve position signals result in regeneration within the cooler, returning the effectiveness of the cooler to a near “clean” condition.03-04-2010
20100269800EXHAUST GAS RECIRCULATION COOLING CIRCUIT - An apparatus for cooling exhaust gas for recirculation in an internal combustion engine includes a separate coolant circuit including an exhaust gas cooler connected to the engine radiator. Circulating coolant outside the engine coolant circuit results in coolant at a lower temperature being delivered to the EGR cooler under most circumstances, and therefore, improved cooling of the exhaust gas.10-28-2010
20090277430Open loop Brayton cycle for EGR cooling - A system for reducing the temperature of waste heat from a waste heat source of a vehicle engine, including an open loop Brayton cycle having a cooler, a compressor, a turbine, and a shaft coupling the compressor to the turbine. Waste heat and compressed air from the compressor flow through the cooler, thereby transferring heat from the waste heat to the compressed air and lowering the temperature of the waste heat. The heated and compressed air is expanded across the turbine, to cause rotation of the shaft, thereby powering rotation of the compressor. Excess power beyond that necessary to drive the compressor may be drawn off through a generator which has its rotor mounted on the same shaft as the compressor and turbine.11-12-2009
20090020106EXHAUST GAS RECIRCULATION SYSTEM - An exhaust gas recirculation system having an exhaust line connected to an exhaust manifold of an engine; an intake line connected to an intake manifold of the engine; and an EGR line that intercommunicates the exhaust line and the intake line, in which a part of exhaust gas exhausted from the exhaust line is delivered to the intake line via the EGR line to be recirculated in the engine, is provided with a liquid cooling heat exchanger made of a corrosion-resistant material at downstream of an intersection with the EGR line in the intake line.01-22-2009
20110023839EGR COOLER BYPASS STRATEGY - A system and method for controlling an engine control an EGR cooler bypass valve to divert at least a portion of EGR flow around an EGR cooler when operating under cooler fouling/plugging conditions, such as during idle, off-idle, exhaust system warm up and DPF regeneration or other post injection operation with EGR gas temperature below a corresponding threshold or with EGR low-temperature coolant temperature below a corresponding threshold. The system and method reduce exhaust gases passing through the EGR cooler that contain a high concentration of unburned or partially unburned fuel when the temperature in the EGR system is lower than the fuel condensation temperature.02-03-2011
20110226222HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME - An exhaust gas recirculation cooler includes an inlet configured to receive exhaust gas from an engine, an outlet configured to direct the exhaust gas back toward the engine, and an exhaust gas flow conduit. The flow conduit includes a first end adjacent the inlet, a second end adjacent the outlet, a first narrow side, a second narrow side, substantially flat broad sides extending between the narrow sides, a first channel adjacent the first narrow side and extending between the ends, a second channel adjacent the second narrow side and extending between the ends, and a plurality of third channels located between the first and second channels and extending between the ends. A plate is located at one end of the flow conduit to inhibit the exhaust gas from flowing through at least one of the first channel and the second channel while allowing exhaust gas flow through the third channels.09-22-2011
20080257317Internal combustion engine with cooling system and exhaust gas recirculation system - In an internal combustion engine with a cooling system and an exhaust gas recirculation (EGR) system including an EGR heat exchanger with a coolant inlet opening connected to a coolant outlet opening of the engine for receiving coolant therefrom and the engine including a coolant collecting rail mounted directly to the engine and having a coolant inlet opening connected to the EGR heat exchanger and at least one other coolant inlet opening in communication directly with at least one other coolant outlet opening of the engine.10-23-2008
20100229842COOLER ARRANGEMENT FOR A MOTOR VEHICLE - A cooler device for a motor vehicle comprising: a charge air cooler with a first cooler element, an EGR cooler with a second cooler element the first cooler element and the second cooler element are arranged substantially in plane with one another. A screening device is arranged in front of or behind the cooler elements in order to regulate the air flow through the cooler elements. The screening device comprises a first screening portion associated with the first cooler element and a second screening portion associated with the second cooler element. A control mechanism is operable to switch the screening device to and fro between an open position and a closed position. The first screening portion allows more air to pass through than the second screening portion when the screening device is in the closed position, in order thereby to control the air flow through the cooler elements in such a way that the air flow through the first cooler element is limited to a lesser extent than the air flow through the second cooler element when the screening device is in the closed position.09-16-2010
20120090585CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - When EGR is on (YES in S04-19-2012
20130008417Control system for engine with exhaust gas recirculation - An internal combustion engine includes an exhaust restriction valve and an exhaust gas recirculation control valve. Upon determining that a malfunction or fault condition exists relative to one of the valves, the controller may command the other valve to move towards a predetermined position. A malfunction or fault condition may result in derating of the engine.01-10-2013
20130014733METHOD FOR COOLING AN INTERNAL COMBUSTION ENGINE HAVING EXHAUST GAS RECIRCULATION AND CHARGE AIR COOLING - A system for cooling charge air from a turbo- or supercharger and exhaust gas recirculated from an exhaust gas recirculation valve in an internal combustion engine. The system includes a radiator and parallel charge air and exhaust gas heat exchanger units, the charge air heat exchanger unit having aluminum tubes and fins for air cooling the charge air, and the exhaust gas heat exchanger unit having stainless steel tubes and fins. The charge air heat exchanger and the exhaust gas heat exchanger units are each disposed adjacent the radiator, on the same or opposite sides. Alternatively, there is provided a pair of combined charge air cooler and exhaust gas cooler heat exchanger units, with a first heat exchanger unit having stainless steel tubes and fins, and a second heat exchanger unit having aluminum tubes and fins. The heat exchanger units are disposed on opposites sides of the radiator.01-17-2013
20130019848EXHAUST GAS RECIRCULATION APPARATUS OF INTERNAL COMBUSTION ENGINE - Provided is an exhaust gas recirculation apparatus of an internal combustion engine which can suppress condensed water from being generated in an EGR pipe at the upstream side of an EGR cooler, and thus can suppress the an EGR pipe from being corroded. An EGR device comprises an EGR pipe formed with an EGR passage held in communication with an exhaust passage and an intake passage, an EGR shutoff valve provided on the EGR pipe to be close to the exhaust passage and operative to selectively take an opened state or a closed state to enable EGR gas to be shut off into the EGR passage in the closed state, an EGR valve provided on the EGR pipe closer to the intake passage than the EGR shutoff valve and operative to selectively take an opened state or a closed state to adjust the amount of the EGR gas flowing into the intake passage, an EGR cooler provided on the EGR pipe between the EGR shutoff valve and the EGR valve to cool the EGR gas flowing into the EGR passage, and a heating pipe 01-24-2013
20130019847RANKINE CYCLE WASTE HEAT RECOVERY SYSTEM AND METHOD WITH IMPROVED EGR TEMPERATURE CONTROL - A waste heat recovery (WHR) system and method for regulating exhaust gas recirculation (EGR) cooling is described. More particularly, a Rankine cycle WHR system and method is described, including an arrangement to improve the precision of EGR cooling for engine efficiency improvement and thermal management.01-24-2013
20110253113METHODS AND SYSTEMS FOR OPERATING AN ENGINE - Various methods and systems are provided for operating an internal combustion engine, the engine having a plurality of cylinders including one or more donor cylinders and one or more non-donor cylinders. In one example, a method includes, during an exhaust gas recirculation cooler heating mode, operating at least one of the donor cylinders at a cylinder load sufficient to increase an exhaust temperature for regenerating an exhaust gas recirculation cooler, and operating at least one of the non-donor cylinders in a low- or no-fuel mode.10-20-2011
20130167813COOLER ARRANGEMENT - A cooler arrangement for connection to an exhaust gas manifold or to an exhaust gas outlet of an engine block of an internal combustion machine includes an exhaust gas cooler comprising at least one exhaust gas duct and a coolant jacket. The exhaust gas cooler is configured to be mounted at the engine block or at the exhaust gas manifold. An exhaust gas recirculation valve is configured to regulate an exhaust gas flow. An actuator is disposed on a side of the exhaust gas recirculation valve opposite the exhaust gas cooler. The actuator is configured to actuate the exhaust gas recirculation valve. A coolant duct segment is arranged between the exhaust gas manifold or the engine block and the actuator. The coolant duct segment is fluidically connected to the coolant jacket.07-04-2013
20130133633REMOVAL APPARATUS FOR REMOVING UNBURNED DEPOSITS IN EGR FLOW PASSAGE OF VEHICLE - There is provided a removal apparatus for removing unburned deposits in an EGR flow passage of a vehicle. A control device of the removal apparatus is provided with a deposit removal implementing unit. The EGR gas flow control valve flows a part of exhaust gas through the EGR flow passage in a case where the control device determines that a temperature of cooling water of an engine is equal to or more than a predetermined temperature. The deposit removal implementing unit implements removal of the unburned deposits in the EGR flow passage in a case where the control device determines that the engine is in a high-load condition while the exhaust gas flows in the EGR flow passage and that it is a deposit removal implementation timing.05-30-2013
20130098341INTERCOOLER FOR VEHICLE - An intercooler for a vehicle that cools a mixture of EGR gas and exhaust gas may include a cooler main body with an inlet portion through which the mixture flows in formed at one side thereof and an outlet portion through which the mixture flows out formed at the other end side thereof, connection tubes that connect the inlet portion with the outlet portion and are arranged from an upper side to a lower side of the cooler main body to cool the mixture, and a condensate storage unit that connects a lower end portion of the inlet portion with a lower end portion of the outlet portion and stores the condensate that is formed in the connection tubes.04-25-2013
20110232613Motor Vehicle Having an Exhaust Gas System - The invention relates to a motor vehicle having an internal combustion engine and an exhaust gas system with an exhaust gas line by means of which exhaust gas from the internal combustion engine can be discharged, and an exhaust gas recirculation line by means of which exhaust gas from the exhaust gas line can be recirculated to an intake manifold of the internal combustion engine. In the exhaust gas recirculation line, there is an exhaust gas cooler which can move relative to the internal combustion engine. Due to the relative mobility, the exhaust gas cooler can be located at a distance from the internal combustion engine so that direct delivery of heat from the internal combustion engine into the exhaust gas cooler is avoided. This improves the cooling performance of the exhaust gas cooler and enables the use of less heat-resistant materials. The invention furthermore relates to a method for operating such a motor vehicle in which a partial flow cross section of the exhaust gas cooler is cleared or closed depending on the operating state of the motor vehicle. This enables adaptation of the cooling performance of the exhaust gas cooler to the operating state of the motor vehicle.09-29-2011
20130152909Diesel-Gasoline Dual Fuel Powered Engine with Fouling Free Clean EGR System - A fouling free clean EGR system for a diesel-gasoline dual fuel powered engine allows re-circulation of an exhaust gas of a certain cylinder among a plurality of cylinders. The fouling free clean exhaust gas recirculation (EGR) system for a diesel-gasoline dual fuel powered engine in which gasoline and air are pre-mixed and supplied to cylinders and then a diesel fuel is injected and combusted together comprises a directly-exhaust cylinder of which an exhaust valve of the cylinder is connected to an exhaust manifold directly connected to a after treatment device; and an EGR cylinder of which an exhaust valve of the cylinder is connected to an EGR line and which supplies the EGR gas to the diesel-gasoline dual fuel powered engine.06-20-2013
20130186377ENGINE WITH COOLANT THROTTLE AND METHOD FOR CONTROLLING THE SAME - A method of controlling cooling flow through a coolant system of an internal combustion engine having an electronic control module, a cooling throttle, an EGR cooler, and an interstage cooler is provided. A pressure within a coolant system is determined. A temperature within the coolant system is determined. A temperature of exhaust gas exiting an EGR cooler is determined. A temperature of intake air exiting an interstage cooler is determined. A position of a cooling throttle within the coolant system is adjusted based upon at least one of the determined pressure within the coolant system, temperature within the coolant system, temperature of exhaust gas exiting the EGR cooler, and temperature of intake air exiting an interstage cooler being above respective predefined thresholds to adjust fluid flow within the coolant system.07-25-2013
20090044789DEVICE FOR RECYCLING AND COOLING EXHAUST GAS FOR AN INTERNAL COMBUSTION ENGINE - A device for recycling and cooling exhaust gas of an internal combustion engine is disclosed, comprising a first exhaust-gas heat exchanger and a second exhaust-gas heat exchanger, wherein the first and second exhaust gas heat exchangers are combined in a structural unit and form a module.02-19-2009

Patent applications in class Exhaust gas cooled during recirculation