Abstract: Exhaust gas feeding device for a internal combustion machine for introducing exhaust gas into a suction channel section of an intake manifold through at least one opening, having an exhaust gas feed section, an exhaust gas feedback valve and an exhaust gas introduction plate that forms a annular channel in the wall region of the suction channel section, wherein the exhaust gas introduction plate is designed as a stamped part with formable webs in such a manner that the webs define a ring channel annular channel with openings in the built-in state of the exhaust gas introduction plate.

Abstract: A cylindrical-walled seat element (50) in a double-pintle (42) EEGR valve (20) is a machined metal part in which two substantially identical apertures (62, 64) collectively span essentially a semi-circumference of the seat element wall (52) and are separated by a narrow axial stabilizer bar (80) in that wall.

Abstract: In an internal combustion engine for a motor vehicle having a support for supporting the internal combustion engine and a system for routing fresh gas and exhaust gas to and from the engine, a mixing valve of an exhaust gas recirculation system is integrated in the support of the engine.

Abstract: Method and arrangement for distributing exhaust gases or gases which are ventilated from a crankcase or an evaporator of a combustion engine having a cylinder head (8) with intake valves and an intake manifold (3) with a flange (9) for mounting on the cylinder head. The intake manifold is provided with at least one collecting channel (11) which extends across each intake pipe of the intake manifold. The ventilation is made by sucking the gases from the collecting channel (11) directly into each intake pipe through a non-return valve (16, 17, 18, 19) arranged in connection with each intake pipe, which non-return valve is controlled by pressure pulses from the intake valves.

Abstract: An exhaust gas recirculation system including an intake passage, an exhaust passage joining the intake passage at a junction and in fluid communication with the intake passage, and a closing member having a first position and a second position. When in the first position, the closing member blocks fluid communication between the intake passage and the exhaust passage. When in the second position, the closing member permits fluid communication between the intake passage and the exhaust passage and creates a pressure differential across the junction so that the fluid is either drawn or forced into the intake passage.

Abstract: An air intake system for an internal combustion engine includes a conduit defining a passageway that conveys air to a manifold. An EGR inlet in the conduit enables EGR to mix with the air. A plate is sufficiently positioned in the passageway such that air in the passageway is divided into two streams. One of the streams flows on one side of the plate and the other stream flows on the other side of the plate. The plate is sufficiently positioned with respect to the EGR inlet such that at least some of the EGR, and preferably the greater part of the EGR entering the passageway, is diverted to flow on only one side of the plate. The plate deflects at least some of the EGR such that it has more time and space in which to mix with the air before being ingested in an engine cylinder. The plate thus enables more consistent EGR distribution among engine cylinders, resulting in better emissions and fuel economy compared to the prior art.

Abstract: An intake manifold mixes and supplies air and exhaust recirculation gas (EGR) to an internal combustion engine. The manifold is a casting and includes an air intake port formed on one side thereof, an intake chamber receiving intake air from the intake port, an outlet plenum communicated with the engine, an EGR inlet port, and first and second EGR valve chambers. A first EGR passage communicates the EGR inlet port with the first EGR valve chamber. A second EGR passage communicates the EGR inlet port with the second EGR valve chamber. A central EGR outlet passage communicates an end of each EGR valve chamber with a central portion of the plenum. First and second EGR outlet chambers receive EGR from the first and second valve chambers, and have outlet ports which communicate with first and second ends of the plenum. An EGR supply conduit and EGR valves can be installed on either side of the manifold so that the manifold can be oriented the air intake projecting upwardly or downwardly.

Abstract: An exhaust gas flow management assembly for an exhaust gas recirculation system including an intake conduit, an exhaust conduit in fluid communication with the intake conduit, and a closing member. The intake conduit includes an inner surface defining a fluid passageway and a recirculation opening in the inner surface. The closing member is movably mounted in the fluid passageway and has a first position where the closing member blocks fluid communication between the intake conduit and the exhaust conduit, and a second position where the closing member extends into the fluid passageway of the intake conduit at an angle relative to a plane including the recirculation opening and opens fluid communication between the intake conduit and the exhaust conduit.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit having a recirculation opening, and an inlet conduit in fluid communication with the manifold conduit. The inlet conduit includes a wall common with the manifold conduit. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit. When in the second position, the closing member opens the recirculation opening and permits fluid communication between the inlet conduit and the manifold conduit and creates a pressure differential across the recirculation opening so that fluid is drawn from the inlet conduit into the manifold conduit.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit and an inlet conduit in fluid communication with the manifold conduit. The manifold conduit includes manifold conduit a recirculation opening, a first open end having a first cross-sectional shape, and a second open end having a second cross-sectional shape. The closing member includes a boundary defining an operative surface. The boundary has a configuration that is different from the first cross-sectional shape and the second cross-sectional shape. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit.

Abstract: A system of operating an internal combustion engine is disclosed. The engine includes an engine block, an exhaust air system in fluid communication with the engine block, the exhaust air system having an exhaust air conduit, an intake air system in fluid communication with the engine block, the intake air system having an intake air conduit, and an intake air compressing device, an EGR system extending between the exhaust air system and the intake air system upstream of the intake air compressing device, and an ECM in communication with the EGR system. The EGR system includes an EGR injector, the EGR injector includes an EGR injector valve, an intermediate portion of intake air conduit, a throat portion positioned coaxially with the intermediate portion of intake air conduit.

Abstract: A carburetion system, without complicated control systems, functions uniformly throughout the range of engine load and incremental increases of power demand to provide efficient stable engine performance for a natural gas fired, internal combustion engine using EGR. A cogeneration system for supplying distributed generation of electricity and process/utility heat, employs a system for engine cooling and effective heat transfer to a cogeneration client, reduces engine head temperature, thereby reducing fuel consumption and reducing pollutants, as well as delivering substantially increased heat to a cogeneration process/utility heat facility by use of a carburetion system which employs at least a pair of spaced apart venturi positioned in series proximate one to another such that a first exhaust recycled gas venturi is upstream of a fuel venturi where fuel and air/exhaust gas are admixed prior to the resultant gas being introduced into a turbocharger.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit and an inlet conduit in fluid communication with the manifold conduit. The manifold conduit includes manifold conduit a recirculation opening, a first open end having a first cross-sectional shape, and a second open end having a second cross-sectional shape. The closing member includes a boundary defining an operative surface. The boundary has a configuration that is different from the first cross-sectional shape and the second cross-sectional shape. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit.

Abstract: A carburetion system, without complicated control systems, functions uniformly throughout the range of engine load and incremental increases of power demand to provide efficient stable engine performance for a natural gas fired, internal combustion engine using EGR. A cogeneration system for supplying distributed generation of electricity and process/utility heat, employs a system for engine cooling and effective heat transfer to a cogeneration client, reduces engine head temperature, thereby reducing fuel consumption and reducing pollutants, as well as delivering substantially increased heat to a cogeneration process/utility heat facility by use of a carburetion system which employs at least a pair of spaced apart venturi positioned in series proximate one to another such that a first exhaust recycled gas venturi is upstream of a fuel venturi where fuel and air/exhaust gas are admixed prior to the resultant gas being introduced into a turbocharger.

Abstract: An apparatus for and method of obstructing an air intake flow (115) improves the mixing and driving force when an EGR flow (111) is introduced to the air intake flow (115). Before the EGR flow (111) enters a passage (113) where it is intended to be mixed with an air flow (115), the air flow (115) is obstructed to enable better and faster mixing of the EGR flow (111) with the air flow (115). A pressure differential is created to increase suction of EGR flow (111) into the intake air flow (115), thereby resulting in increased EGR flow (111) into the cylinders of an engine.

Abstract: An integrated intake manifold assembly including a poppet valve disposed at the air inlet to the manifold to regulate air flow into the manifold; a poppet valve disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bi-directional camshaft with cams for operating simultaneously the manifold vacuum regulating (MVR) valve and the exhaust gas recirculation (EGR) valve. The valve bodies are integrally formed in the wall of the intake manifold. The camshaft is driven by a DC motor and gear train. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers connected to the camshaft for coordinated motion with the MVR and EGR valves.

Abstract: An integrated intake manifold assembly including a poppet valve disposed at the air inlet to the manifold to regulate air flow into the manifold; a poppet valve disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bi-directional camshaft with cams for operating simultaneously the manifold vacuum regulating (MVR) valve and the exhaust gas recirculation (EGR) valve. The valve bodies are integrally formed in the wall of the intake manifold. The camshaft is driven by a DC motor and gear train. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers connected to the camshaft for coordinated motion with the MVR and EGR valves.

Abstract: An EGR valve apparatus regulates the amount of exhaust gas recirculated in an EGR system. The EGR valves are opened or closed by a rotatable shaft which is actuated by a motor. Alternatively, the valves can be balanced on the shaft, the valves moving in opposing direction during rotation. An inline poppet can be employed to overcome pressure in the system prior to movement of the valves. In another alternative embodiment, the motor rotates threaded shaft to move a pintle towards and away from an orifice.

Abstract: An integrated intake manifold assembly including a first poppet valve assembly disposed at the air inlet to the manifold to regulate air flow into the manifold; a second poppet valve assembly disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bi-directional camshaft with cams for operating simultaneously the manifold vacuum regulating the poppet valves. The valve bodies are integrally formed in the wall of the intake manifold. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the manifold assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers, connected to the camshaft internally of the manifold and swirl plate, for coordinated motion with the MVR and EGR valves.

Abstract: A method and a device for exhaust gas recycling (EGR) in a combustion engine (1), wherein EGR gases are led into a section of the intake channel where a venturi (9) is arranged for modifying the flow of the intake air, and where a reduced pressure prevails because of modified flow, wherein at least a portion of the wall (10) of the venturi (9) is adjustable for varying the cross section of the venture and thereby for desired adjustment to prevailing operational conditions.

Abstract: An internal combustion engine, particularly suitable for use in a work machine, is provided with an exhaust manifold, a turbocharger, and a bypass venturi assembly. The turbocharger includes a turbine and a compressor, with the turbine having a variable geometry inlet coupled with the exhaust manifold, and the compressor having an outlet. The bypass venturi assembly includes a housing having an outlet, a combustion air inlet and an exhaust gas inlet. The combustion air inlet is coupled with the compressor outlet. The exhaust gas inlet is coupled with the exhaust manifold. A center piece is positioned within the housing and is in communication with the combustion air inlet. The center piece defines a combustion air bypass section therein. A combustion air bypass valve is positioned in association with the combustion air bypass section. The exhaust gas valve is positioned in association with the exhaust gas inlet.

Abstract: An internal combustion engine, particularly suitable for use in a motor vehicle, is provided with a combustion air supply, an exhaust manifold, and a bypass venturi assembly. The bypass venturi assembly includes a housing having an outlet, a combustion air inlet connected and in communication with the combustion air supply, and an exhaust gas inlet connected and in communication with the exhaust manifold. A venturi nozzle is positioned in communication with the combustion air inlet. The venturi nozzle defines a bypass venturi section therein. The venturi nozzle and the housing define an exhaust gas venturi section therebetween terminating at an induction area. The venturi nozzle has a plurality of through holes in communication with a downstream portion of the exhaust gas venturi section. The exhaust gas inlet terminates at the induction area. A bypass valve is positioned to open and close the bypass venturi section.

Abstract: In a flap valve for controlling a gas stream, having a valve tube that carries the gas stream and having a valve flap, disposed in the valve tube, that is pivotable between a closing position and an open position and is seated in a manner fixed against relative rotation on an adjustable flap shaft, to avoid openings of the shaft in the valve tube inside the sealing region between the valve flap and the valve tube, the flap shaft is oriented such that its axis forms an acute angle (&agr;) with the axis of the valve tube. The valve flap seated on the flap shaft in a manner fixed against relative rotation is oriented such that in its closing position, its surface normal is aligned with the axis of the valve tube or extends at an acute angle to it.

Abstract: An integrated intake manifold assembly including a poppet valve disposed at the air inlet to the manifold to regulate air flow into the manifold; a poppet valve disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bi-directional camshaft with cams for operating simultaneously the manifold vacuum regulating (MVR) valve and the exhaust gas recirculation (EGR) valve. The valve bodies are integrally formed in the wall of the intake manifold. The camshaft is driven by a DC motor and gear train. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers connected to the camshaft for coordinated motion with the MVR and EGR valves.

Abstract: An integrated intake manifold assembly including a first poppet valve assembly disposed at the air inlet to the manifold to regulate air flow into the manifold; a second poppet valve assembly disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bidirectional camshaft with cams for operating simultaneously the manifold vacuum regulating the poppet valves. The valve bodies are integrally formed in the wall of the intake manifold. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the manifold assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers, connected to the camshaft internally of the manifold and swirl plate, for coordinated motion with the MVR and EGR valves.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit having a recirculation opening, and an inlet conduit in fluid communication with the manifold conduit. The inlet conduit includes a wall common with the manifold conduit. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit. When in the second position, the closing member opens the recirculation opening and permits fluid communication between the inlet conduit and the manifold conduit and creates a pressure differential across the recirculation opening so that fluid is drawn from the inlet conduit into the manifold conduit.

Abstract: The invention relates to a method for interrupting the regeneration of a particulate filter in the exhaust gas system of a diesel engine to protect the filter against destructive overheating. In this case, an electronic control unit calculates a desired mass air mass flow rate (MAFdes) based on engine speed (n), fuel supply (Fq) to the engine, and air/fuel ratio (A/Fdes). A mass air flow rate regulator controls the position of an exhaust gas recirculation (EGR) valve as a function of the difference between the desired mass air mass flow rate (MAFdes) and the measured mass air flow rate (MAFmes). An intake manifold absolute pressure controller adjusts the position of an intake throttle valve as a function of the difference between the measured intake manifold absolute pressure (MAPmes) and the modified intake manifold absolute pressure (MAPmod). MAPmod is determined by a coordination module, based on the mass air flow rate error and other parameters.

Abstract: An integrated intake manifold assembly including a first poppet valve assembly disposed at the air inlet to the manifold to regulate air flow into the manifold; a second poppet valve assembly disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bi-directional camshaft with cams for operating simultaneously the manifold vacuum regulating (MVR) valve and the exhaust gas recirculation (EGR) valve. The valve bodies are integrally formed in the wall of the intake manifold. The camshaft is driven by a DC motor and gear train. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the manifold assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers connected to the camshaft for coordinated motion with the MVR and EGR valves.

Abstract: An exhaust gas flow management assembly for an exhaust gas recirculation system including an intake conduit, an exhaust conduit in fluid communication with the intake conduit, and a closing member. The intake conduit includes an inner surface defining a fluid passageway and a recirculation opening in the inner surface. The closing member is movably mounted in the fluid passageway and has a first position where the closing member blocks fluid communication between the intake conduit and the exhaust conduit, and a second position where the closing member extends into the fluid passageway of the intake conduit at an angle relative to a plane including the recirculation opening and opens fluid communication between the intake conduit and the exhaust conduit.

Abstract: An integrated intake manifold assembly including a poppet valve disposed at the air inlet to the manifold to regulate air flow into the manifold; a poppet valve disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bi-directional camshaft with cams for operating simultaneously the manifold vacuum regulating (MVR) valve and the exhaust gas recirculation (EGR) valve. The valve bodies are integrally formed in the wall of the intake manifold. The camshaft is driven by a DC motor and gear train. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers connected to the camshaft for coordinated motion with the MVR and EGR valves.

Abstract: A total pressure exhaust gas recirculation duct system includes a turbocharger having a turbine inlet scroll, an exhaust gas recirculation duct and a valve assembly disposed between a port and inlet scroll and the inlet to the exhaust gas recirculation duct. The valve is situated so that the valve blade member extends from the inlet scroll port into the exhaust gas stream to divert a portion of the exhaust gas into the EGR duct. The valve has a pivot shaft disposed within a corresponding channels of the inlet scroll housing and the EGR duct with a free end extending beyond the inlet scroll and the EGR duct for actuation of the valve. Alternatively, the valve can include a blade element attached to the distal end of an actuating rod and positioned in the port of the inlet scroll. The proximal end of the actuation rod extends through a passageway in the EGR duct or the inlet scroll for actuation of the valve.

Abstract: An exhaust gas recirculation system including an intake passage, an exhaust passage joining the intake passage at a junction and in fluid communication with the intake passage, and a closing member having a first position and a second position. When in the first position, the closing member blocks fluid communication between the intake passage and the exhaust passage. When in the second position, the closing member permits fluid communication between the intake passage and the exhaust passage and creates a pressure differential across the junction so that the fluid is either drawn or forced into the intake passage.

Abstract: A flow modifier for insertion into the chamber of a large pintle valve to change the apparent flow range of the valve to that of a smaller valve. The flow modifier includes a perforated cup-shaped restrictor disposed within the valve on the valve pintle and sealingly surrounding the valve seat such that all flow through the valve must pass through the passageways in the restrictor. The restrictor is held in place by a compression spring surrounding the pintle. The total open area of the passageways may be varied by varying their number and/or size and is preferably substantially less than the open area of the valve seat. The restrictor thus acts as a flow choke or fixed throttle to reduce the flow range of the valve. Different restrictors may be provided as required to size a single large valve having a large inherent flow range to a plurality of applications requiring valves having smaller flow ranges.

Abstract: A valve unit for internal combustion engines with a drive unit, a gear mechanism, a valve rod and a valve disk, the gear mehanicm being provided with an eccentrically disposed coupling part which is connected coactingly with the valve rod, the coupling part being a bearing element which serves as a connection means with the valve rod. A combustion-air intake-channel portion and an exhaust-gas return unit are integrally combined with the valve unit.

Abstract: A bypass venturi assembly for recirculating exhaust gas in an internal combustion engine, Particularly suitable for use in an on-road vehicle, is provided with a housing having an outlet, a combustion air inlet and an exhaust gas inlet. A center piece is Positioned within the housing and is in communication with the combustion air inlet. The center piece defines a combustion air bypass section therein. A combustion air bypass valve is positioned in association with the combustion air bypass section. An exhaust gas valve is positioned in association with the exhaust gas inlet. An elbow is coupled with the outlet and defines a fluid flow path. The elbow includes a vane therein which is positioned in association with the flow path.

Abstract: An Exhaust Gas Recirulation (EGR) valve is integrated onto a turbocharger by providing an EGR outlet in a flange in the volute of the turbine housing and a mating valve assembly extending from a mating flange with an elbow. The outlet direction of the elbow is adjustable to a plurality of directions by positioning the mating flange relative to the EGR outlet flange.

Abstract: An internal combustion engine system, particularly suitable for a motor vehicle, is provided with an intake manifold, an exhaust manifold and an exhaust gas recirculation rate control system fluidly connected to the exhaust manifold and to the intake manifold. The exhaust gas recirculation rate control system includes at least two critical-flow nozzles, each critical-flow nozzle having an intake end and output end, the intake ends being fluidly coupled to the exhaust manifold; at least one valve, each valve being fluidly coupled with at least one output end; and a control module operatively connected to each valve for controlling exhaust gas flow therethrough. Some advantages of such a system is that the exhaust gas recirculation is accurately provided with an “open-loop” control system, thereby avoiding the use of a feedback system; the flow can be accurately determined under a choked-flow operating conditions; and the system can readily handle different exhaust gas flow rates.

Abstract: An internal combustion engine system, particularly suitable for a motor vehicle, is provided with an intake manifold, an exhaust manifold and an exhaust gas recirculation rate control system fluidly connected to the exhaust manifold and to the intake manifold. The exhaust gas recirculation rate control system includes at least two critical-flow nozzles, each critical-flow nozzle having an intake end and output end, the intake ends being fluidly coupled to the exhaust manifold; at least one valve, each valve being fluidly coupled with at least one output end; and a control module operatively connected to each valve for controlling exhaust gas flow therethrough. Some advantages of such a system is that the exhaust gas recirculation is accurately provided with an “open-loop” control system, thereby avoiding the use of a feedback system; the flow can be accurately determined under a choked-flow operating conditions; and the system can readily handle different exhaust gas flow rates.

Abstract: An improved engine emission control for controlling both nitrous oxide emissions through an exhaust gas recirculation system and evaporative fuel emissions. These gases (exhaust and evaporated fuel) are mixed with the intake charge in a mixing chamber that surrounds the intake passage so as to insure good mixing at an upstream point removed from the combustion chambers so that a uniform mixture will be delivered to each chamber and there will be uniformity in the added mixture between the chambers.

Abstract: In an internal combustion engine having an air intake system and an exhaust outlet system, and an exhaust gas recirculation system which has an exhaust-gas recirculation line and an exhaust-gas recirculation valve for supplying a controlled quantity of exhaust gas to the air intake system, the recirculation valve is separated from the apparatus which introduces the exhaust gas into the air intake so that it is exposed only to exhaust gas and not to the air intake flow.

Abstract: When an internal combustion engine supercharged by way of an exhaust-driven turbocharger is operated, compressed charge air is diverted as a function of the operating point of the internal combustion engine, by opening a shutoff valve in an overflow duct, out of a charge air duct leading to the internal combustion engine into an exhaust gas duct to the turbine of the exhaust-driven turbocharger in the presence of a driving pressure drop. In order to optimize supercharging performance over the entire operating characteristics diagram of the internal combustion engine, and decrease the exhaust emissions of the internal combustion engine, provision is made for the overflow duct to be enabled as necessary, for the recirculation of exhaust gas into the charge air duct, when a pressure drop driving toward the charge air duct is present.

Abstract: A mounting structure is provided for an EGR valve or an EGR tube. The EGR valve or the EGR tube is made of stainless steel or cast iron which is high in the physical strength at a high temperature. The EGR valve or the EGR tube is mounted to an intake manifold made of aluminum by means of bolts or stud bolts. The EGR valve or the EGR tube has female threads provided therein into which the bolts or stud bolts are screwed. The intake manifold has through holes provided therein through which the bolts or stud bolts extend.

Abstract: An internal combustion engine intake manifold has a wall separating internal manifold space from an external space. An EGR valve for recirculating engine exhaust gases mounts on the wall such that an EGR outlet port of the EGR valve is communicated to the internal manifold space. EGR valves having various mounts for closing valve mounting holes in the manifold wall are disclosed.

Abstract: An exhaust gas recirculation valve for an internal combustion engine (16). A one-piece adapter part (10; 10′) contains a combustion air passageway (34) through which combustion air can enter the engine and a coolant passageway (18) through which engine coolant can flow. The adapter part also has an exhaust gas recirculation passageway (22) through which engine exhaust gas can be introduced into the combustion air passageway. An electric-operated exhaust gas recirculation valve (12) for controlling the recirculation of engine exhaust gas through the engine has a valve member (28) that is positionable with respect to a valve seat (26) that circumscribes the exhaust gas passageway in the adapter part.

Abstract: An air intake arrangement for an internal combustion engine comprising: a main air intake conduit leading to a gas intake valve (241) for respective engine cylinders (206) and including a main air intake passage (202), a main collector chamber (204) and independent branching air intake passages (205) for the respective engine cylinders (206) connected in series; a throttle valve (203) disposed in the main intake air passage (202) for controlling the flow rate of air passing therethrough; an auxiliary air intake passage (210) bypassing the main air intake conduit, wherein an inlet port of the auxiliary air intake passage (210) opens into the main air intake passage (202) at the upstream of the throttle valve (203), and an outlet port (213) of the auxiliary air intake passage (210) opens into the respective independent branching air intake passage (205) near the gas intake valve (241) for the respective engine cylinders (206) in such a manner that gas blown-out from the auxiliary air intake passage (210) induc