Abstract: Transmission shocks and idling defects such as engine racing and rough idling due to aging of a throttle opening area are prevented from occurring. An internal combustion engine control apparatus for controlling an internal combustion engine that has an air flow rate sensor for measuring a rate of air represented as an actual air rate, the air flowing into a cylinder, and a throttle valve for adjusting the rate of air, includes a throttle valve controlling section for controlling a throttle opening of the throttle valve to reach a preset throttle opening set depending on a target air rate for realizing a demand torque, and a throttle opening correcting section for correcting the preset throttle opening on the basis of the target air rate upon fuel cutoff that stops a fuel from being supplied to the internal combustion engine and of an actual air rate measured by the air flow rate sensor.

Abstract: A hydraulic servo device includes: a servo piston configured to move in an axial direction with respect to a device main body; and a stroke sensor configured to detect an amount of movement of the servo piston with respect to the device main body. The hydraulic servo device is configured to change a supply flow rate of exhaust gas to a turbine of a turbocharger by moving the servo piston according to applied hydraulic pressure. A cooling water channel through which cooling water is to be supplied is provided at a part between the turbocharger and the stroke sensor.

Abstract: A number of variations may include an actuator and valve arrangement.

Abstract: An engine system is disclosed for use with an engine having at least a first cylinder and a second cylinder. The engine system may have a first exhaust manifold fluidly connected to the first cylinder, a second exhaust manifold fluidly connected to the second cylinder, and a recirculation passage extending from the first exhaust manifold to at least one of the first and second cylinders. The engine system may also have a restricted orifice connecting the first exhaust manifold to the second exhaust manifold, a pressure relief passage extending from the first exhaust manifold, and a valve disposed within the pressure relief passage and movable to selectively reduce a back pressure of the first exhaust manifold.

Abstract: A basic EGR flow rate calculation part calculates a basic EGR flow rate based on an intake manifold pressure, which is a pressure in an intake manifold, an exhaust pressure, which is a pressure in an exhaust pipe, an exhaust temperature, which is a temperature in the exhaust pipe, and an opening degree of an EGR valve. An EGR flow rate correction part corrects the basic EGR flow rate based on an intake manifold pressure ratio, which is a ratio between the intake manifold pressure and the exhaust pressure, and an exhaust VVT phase angle of an exhaust VVT mechanism, to thereby calculate a corrected EGR flow rate as an EGR flow rate.

Abstract: A number of variations may include a product, which may include an actuator including a rotatory portion for moving a valve from a first position to a second position and a biasing spring for retuning the valve to the first position.

Abstract: A motor vehicle exhaust gas recirculation valve arrangement for an exhaust gas recirculation system of an internal combustion engine includes an electric drive motor, an intermediate shaft, an eccentric shaft, and a valve drive. The electric drive motor comprises a motor shaft and a motor pinion. The intermediate shaft comprises an intermediate shaft pinion and an output gear. The output gear is configured to mesh with the motor pinion. The eccentric shaft comprises an eccentric and a drive gear. The drive gear is configured to mesh with the intermediate shaft pinion. A valve drive comprises a valve plate, a valve rod, and a link. The link is configured to have the eccentric engage therein. The intermediate shaft is arranged laterally beside the eccentric shaft so that the eccentric and the link lie beside the drive motor.

Abstract: A method determines a correction amount of an EGR valve opening degree. A basic correction amount map is generated indicating a correlation between rotating speed, load factor, and the correction amount, while the opening degree is maintained at a reference opening degree and the EGR rate is maintained at a target EGR rate, based on correction amounts obtained for mutually different individual combinations of the rotating speed and the load factor. Estimated values of the correction amounts not contained in the basic map are acquired by estimating the distribution of the amounts not in the basic map based on a distribution trend. An extended correction amount map is generated indicating a correlation between the estimated values of the rotating speed, the load factor, and the correction amount while the opening degree is maintained at a reference opening degree and the EGR rate is maintained at a target rate.

Abstract: An exhaust-gas turbocharger includes a turbine housing and a wastegate which is disposed in the turbine housing and has a wastegate flap. The wastegate flap can be adjusted by an output shaft of a wastegate actuator. The output shaft has a central axis. The wastegate actuator is an integral constituent part of the turbine housing. During an adjustment of the wastegate flap, the output shaft of the wastegate actuator interacts with a wastegate spindle which has a central axis. The output shaft of the wastegate actuator is thermally decoupled from the wastegate spindle.

Abstract: In an EGR valve, an actuator includes a coil, a rotor body to be driven to rotate when the coil is energized with electric current, and a converting mechanism to convert rotational movement of the rotor body into stroke movement of the rod to bring a valve into or out of contact with a seat. The rod includes a stopper that will contact with a protrusion of the rotor body when the valve is placed in a full closed state. An end face of the stopper and an end face of the protrusion are slanted with respect to a stroke direction of stroke movement of the rod.

Abstract: A valve device for an internal combustion engine includes a multi-part housing. A drive unit generates a rotational moment. The drive unit is arranged in a motor chamber. A transmission unit is arranged in a transmission chamber. An eccentric is configured to be driven by the transmission unit. A valve rod is configured to be displaceable in translation. The valve rod extends into a valve rod displacement chamber. A coupling element converts a displacement of the eccentric into a translational displacement of the valve rod. A valve seat is arranged between an inlet and an outlet. A valve closing body is attached to the valve rod. The valve closing body is configured to be lowered onto the valve seat and lifted off the valve seat. A cover is disposed between the eccentric and the coupling element. The cover is configured to separate the transmission chamber from the valve rod displacement chamber.

Abstract: A gear subassembly is for an exhaust gas recirculation (EGR) system including an EGR valve and a rotatable shaft provided for the EGR valve. The gear subassembly includes a gear and a cam. The gear is a part of reduction gears and is fastened to the rotatable shaft to rotate therearound. The cam is fastened to the gear and is a part of a link mechanism. The gear includes a metal shaft-fastening part used for fastening the gear to the rotatable shaft, and a metal cam-fastening part used for fastening the gear to the cam. The gear is formed by resin-molding with the shaft-fastening part and the cam-fastening part serving as insert parts.

Abstract: When a constant driving voltage is applied to a motor driving an EGR valve so that the EGR opening degree is varied, an angular speed of the EGR valve becomes minimal at a position where the driving torque of the EGR valve becomes maximal. In view of this, while an opening degree of the EGR valve is varied with a constant driving voltage applied to the motor, the EGR opening degree where the angular speed becomes minimal is learned as a full-close position.

Abstract: Exhaust gas recirculation (EGR) systems and methods are provided. In one embodiment, a method for controlling an engine includes providing a first EGR gas flow to an intake manifold of the engine by closing a first EGR valve or a second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve, wherein the first and second EGR valves are respectively positioned in first and second EGR passages respectively coupled between first and second donor cylinder groups and an intake manifold, and providing a second EGR gas flow that is higher than the first EGR gas flow to the intake manifold by fully opening the first EGR valve or the second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve.

Abstract: A valve (10) may be used with an internal combustion engine exhaust breathing system (12) and may include a body (60), a partition (62), and a plate (66). The body (60) may define a first port (70) that has a first interior surface (76), and may also define a second port (82) that has a second interior surface (84). The partition (62) may be located within the body (60), may at least partially separate the first port (70) and the second port (82) from each other, and may define an opening (104). The plate (66) may be dimensioned to seat and seal against the opening (104) and against the first and second interior surfaces (76, 84). The plate (66) may rotate, depending on predetermined factors, between a first position and a second position.

Abstract: A control device executes a feedback control operation of an electric motor such that a sensed opening degree of a valve approaches a target opening degree, which is set for a time of fully closing the valve. The control device stops the energization of the electric motor after reaching of the sensed opening degree of the valve to an energization stop opening degree, which is set on a valve opening side of a full closing degree of the valve in a valve opening direction of the valve. A return spring urges the valve in a valve closing direction of the valve. The target opening degree is set on a valve closing side of the energization stop opening degree in the valve closing direction.

Abstract: An exhaust control system for a vehicle comprises an exhaust system modeling module and an actuator control module. The exhaust system modeling module estimates an input gas temperature, an output gas temperature, a mass temperature, and a pressure for an exhaust system component of an exhaust system implemented in the vehicle. Exhaust gas flows through the exhaust system component. The actuator control module selectively adjusts an engine operating parameter based on at least one of the input gas temperature, the output gas temperature, the mass temperature, and the pressure.

Abstract: The invention relates to a method and an apparatus for determining an exhaust gas recirculation rate in an internal combustion engine, in which the exhaust gas recirculation rate indicates a proportion of exhaust gas in a gas quantity delivered to a cylinder of the internal combustion engine, and combustion takes place in the cylinder of the engine cyclically during a combustion phase. The method includes the steps of ascertaining a combustion course statement over the course of combustion in the cylinder of the engine, and ascertaining an actual exhaust gas recirculation rate from the combustion course statement with the aid of a predetermined exhaust gas recirculation rate function.

Abstract: An article of manufacture includes a first rotor having a first flow-through area that is more than 50% of a total first rotor flow area and a first ridged arc member, and a second rotor having a second flow-through area that is more than 50% of a total second rotor flow area and a second ridged arc member. The article further includes an upstream stator and a downstream stator, each stator having a co-extensive stator flow-through area and a co-extensive structural area. The article includes an actuator having an engagement gear between the ridged arc members, where a turn of the engagement gear moves the ridged arc members in opposing directions. The first rotor and second rotor are phased to be at a maximum closed at a first position of the engagement gear and a maximum open at a second position of the engagement gear.

Abstract: An internal combustion engine system includes a fresh air system, an exhaust gas system and an exhaust gas recirculation system. The exhaust gas recirculation system has an exhaust gas valve assembly for controlling a removal flow at a recirculation line removal point and a fresh air valve assembly for controlling an introduction flow at a fresh air line introduction point. The exhaust gas valve assembly is permanently displaceable between a first position and a second position for generating the removal flow. The fresh air valve assembly is permanently displaceable between a first position and a second position for generating the introduction flow. The valve assemblies are synchronized such that the positive pressure pulses entering at the removal point into the recirculation line meet the negative pressure pulses at the introduction point.

Abstract: A valve control apparatus sets a certain soft landing start target position to a drive control unit for carrying out driving of a DC motor 2 as a target open position in response to a fully close command, and sets the target open position which the valve control apparatus acquires by gradually decreasing the soft landing start target position to the above-mentioned drive control unit at a time when the difference between an actual open position and the soft landing start target position becomes equal to a first threshold.

Abstract: Three-way valve with two flaps comprising single control means (9) for the two flaps and actuation means (12, 13, 50) arranged each to drive, pivotwise, one of the two flaps, from one to the other of its open and closed position of one of the pathways, with a temporal phase-shift, characterized in that it comprises maximum displacement end-stops for each of said actuation means, the end-stop (31) of the second actuation means (12, 50) corresponding to a fully closed position of its flap and the end-stop of the first actuation means (13) being positioned beyond the position of said first actuation means when the second actuation means (12, 50) is on its end-stop (31), the kinematic chains linking the first and second actuation means to the single control means operating nominally.

Abstract: An exhaust gas recirculation valve in a vehicle has two valves that are controlled individually by using one driving source. The exhaust gas recirculation valve enables secure operation of a vehicle even if the driving source is out of order. The exhaust gas recirculation EGR valve includes a driving unit having a driving motor for rotating a motor shaft and an interlocking unit for receiving rotational force from the motor shaft. A rod portion moves upon reception of the rotational force. A valve unit at an end portion of the rod portion controls a flow rate of the exhaust gas. A valve housing is coupled to the driving unit as one unit and has an EGR port and a bypass port. The interlocking unit includes a valve return member for rotating the motor shaft forcibly to make the valve unit to move to an initial position.

Abstract: A method of operating an engine system is described in which a back-pressure valve of a low pressure EGR system can be modulated at a lower frequency during an EGR operation, and at a higher frequency when additional exhaust gas sensing is requested. Back-pressure valve modulation can therefore be used to promote exhaust gas mixing while providing EGR. Exhaust gas constituents in the mixed exhaust gas can then be sensed with higher accuracy by downstream exhaust gas sensors.

Abstract: The invention relates to an engine control valve (1) which comprises a rotatable actuator (7), a valve (5), and a movement transformation device (9) suitable for transforming the rotation of the actuator (7) into translation of the valve (5). The movement transmission device (9) comprises a helical link with uniform pitch for translating the valve (5).

Abstract: An exhaust gas recirculation valve comprises a drive, at least one rotatable drive element and at least one translationally drivable driven element. The drive element comprises a thread element that is configured to convert rotational motion of the drive element into translation of the driven element. A rotational axis of the drive element is inclined with respect to a translational axis of the driven element.

Abstract: A fluid selection valve unit comprising a valve seat having a side surface having a predetermined depth and a bottom surface continuous to the side surface and a valve member supported with a rotary shaft at one end. The valve member includes a bottom portion and a side end surface formed above the bottom portion, and is configured so that a passage area of a gap formed between the side end surface of the valve member and the side surface of the valve seat is smaller than a contact passage area formed between the bottom portion of the valve member and the bottom surface of the valve seat during a time when the bottom portion of the valve member comes into contact with the bottom surface of the valve seat by the rotation of the rotary shaft, and the rotary angle increases up to a predetermined value of the rotary angle.

Abstract: An actuator having an output axis which is moved linearly by a rotatory force, and a boss for holding the above-mentioned output axis in such a way that the output axis can move linearly includes a connecting member for propagating the linear motion of the above-mentioned output axis to an external device. The above-mentioned connecting member is comprised of a joint connected to the above-mentioned output axis, and a link plate having an end rotatably connected to the above-mentioned joint, and another end rotatably connected to the external device. A mechanism for preventing rotation of the above-mentioned output axis is constructed of only a connecting portion for connecting the above-mentioned joint, the above-mentioned link plate, and the above-mentioned external device to one another.

Abstract: A valve arrangement is provided for an exhaust gas recirculation device of an internal-combustion engine. The engine has at least one inlet and at least one outlet. The recirculation device includes an inlet on the internal-combustion engine outlet side, an outlet on the internal-combustion engine inlet side, and several, particularly two flow paths extending between the inlet and the outlet and being parallel at least in areas. The valve arrangement has a first control element and a second control element for automatically regulating/controlling fluid flow flowing between the inlet and the outlet and automatically regulating/controlling the distribution of this fluid flow between the several flow paths. A common actuator is provided for operating the first control element as well as the second control element.

Abstract: The combination valve comprises a tubular center part, a gas inlet which is arranged on the outer shell of the tubular center part, a gas outlet A which is arranged adjacent to the gas inlet on the outer shell of the tubular center part, a first branch which is arranged opposite the gas outlet on the outer shell of the tubular center part, and a second branch which is arranged opposite the gas inlet on the outer shell of the tubular center part. The first branch is connected to the second branch via a cooler. A rotary slide is mounted centrally in the tubular center part such that it can rotate about the longitudinal axis of the tubular centre part. Depending on the operating state, the rotary slide shuts off at least partially the gas inlet, the gas outlet, the first branch and the second branch.

Abstract: An exhaust gas recirculation apparatus includes a housing connected with an EGR cooler via a mount face. The housing has a valve chamber accommodating a selector valve. The housing has a partition extending from the mount face close to the valve chamber to divide first and second exhaust ports opened in the mount face. A first passage leads exhaust gas into the EGR cooler through the valve chamber. A second passage recirculates exhaust gas to the intake passage through the EGR cooler and the valve chamber. A bypass passage leads exhaust gas from the engine through the valve chamber to bypass the EGR cooler. A rotation axis of the selector valve is perpendicular to an axis of the mount face, and offset away from the partition.

Abstract: A method of operating an engine system is described in which a back-pressure valve of a low pressure EGR system can be modulated at a lower frequency during an EGR operation, and at a higher frequency when additional exhaust gas sensing is requested. Back-pressure valve modulation can therefore be used to promote exhaust gas mixing while providing EGR. Exhaust gas constituents in the mixed exhaust gas can then be sensed with higher accuracy by downstream exhaust gas sensors.

Abstract: An EGR valve device includes a valve housing of which inside exhaust gas passes through, a poppet valve as a valve body accommodated in the valve housing, and a hydraulic servo actuator for driving the poppet valve to be opened and closed. The hydraulic servo actuator is provided by a three-port or four-port servo valve.

Abstract: An actuating drive for a bi-directionally adjustable actuator for at least on of an exhaust gas recirculation device and an exhaust gas turbocharger. The actuating drive includes an electric motor; a toggle lever, which articulates with the actuator via a first toggle lever bearing; and a gear mechanism, connecting the electric motor with the toggle lever, wherein the gear mechanism includes a toothing element on an output side mounted in a pivot bearing, wherein the toggle lever is articulating mounted via a second toggle lever bearing, wherein in a starting state of the actuating drive is associated with a starting position of the actuator, and wherein an acute angle exists between a first straight line extending through the first toggle lever bearing and through the second toggle lever bearing, and a second straight line extending through the pivot bearing and through the second toggle lever bearing.

Abstract: A method for controlling EGR gas flow in an internal combustion engine during ongoing operation includes determining an engine operating point and a preferred EGR fraction for a cylinder charge based upon the engine operating point. A feed-forward command for controlling an external EGR gas flowrate to an engine intake manifold based upon the preferred EGR fraction for the cylinder charge is determined. An EGR ratio in the intake manifold is determined. And, the external EGR gas flowrate is controlled based upon the estimated EGR ratio in the intake manifold and the feed-forward command for controlling the external EGR gas flowrate.

Abstract: The combination valve comprises a tubular center part, a gas inlet which is arranged on the outer shell of the tubular center part, a gas outlet A which is arranged adjacent to the gas inlet on the outer shell of the tubular center part, a first branch which is arranged opposite the gas outlet on the outer shell of the tubular center part, and a second branch which is arranged opposite the gas inlet on the outer shell of the tubular center part. The first branch is connected to the second branch via a cooler. A rotary slide is mounted centrally in the tubular center part such that it can rotate about the longitudinal axis of the tubular centre part. Depending on the operating state, the rotary slide shuts off at least partially the gas inlet, the gas outlet, the first branch and the second branch.

Abstract: The present invention relates to a method of controlling an internal-combustion engine comprising at least one cylinder (10) with at least one burnt gas exhaust means (12) including an exhaust valve (16) whose opening/closing is controlled by control means (22) and an exhaust pipe (14) connected to an exhaust line (18, 20), at least two intake means (26, 28) comprising each a valve (32, 36) whose opening/closing is controlled by a dedicated actuating means (46, 48) and a pipe (30, 34). The method, during low load or medium load running of the engine: controls the closed position of exhaust valve (16) and controls one (36) of the intake valves so as to operate it as a burnt gas discharge valve.

Abstract: An exhaust-gas recirculation (EGR) valve includes a rotary drive. The rotary drive includes a cam member that has a cam profile. The rotary drive permits operation of a valve member that can be rotated around a rotational shaft. During the course of a closing movement, the EGR valve can, toward the end of the closing movement, move towards a valve seat in a direction that is generally parallel to a direction of flow through the valve seat.

Abstract: A hydraulic assembly and method for use with an vehicle engine exhaust flow control valve for controlling flow to at least one intake supply. The assembly has an actuator, such as a spring return piston cylinder, for positioning the control valve. An inlet passage, communicating with the cylinder, is arranged for supplying hydraulic fluid to a side of the actuator and a drain is arranged for draining the hydraulic fluid from the side of the actuator. An on-off type hydraulic valve, communicating with the drain, is operably coupled to the cylinder for controlling communication of the hydraulic fluid from the cylinder side to the drain. When the hydraulic assembly is in use, the pressure of hydraulic fluid acting on the actuator is adjustable by operation of the on-off type valve thereby to control movement of the actuator and, in turn, movement of the control valve.

Abstract: The present disclosure relates to a method and/or engine controller and/or article comprising a storage medium having stored thereon instructions that when executed by a machine estimate air fractions in internal combustion engines with dual-loop EGR (exhaust gas recirculation) systems for supporting multiple alternative combustion modes.

Abstract: Means for attenuating the seating force of a cam-actuated poppet valve such as an exhaust gas recirculation valve in an internal combustion engine including a shock-absorber disposed between the valve stem and valve head. In a currently preferred embodiment, the shock-absorber is a wave washer disposed around the valve stem and captured between the valve stem and the valve head, between which axial motion is allowed. After the valve head engages the valve seat to close the valve, any further travel of the actuator cam and valve stem is absorbed by compression of the wave washer, thus attenuating additional force on elements of the valve actuation train. In opening the valve, the reverse occurs, in that initial motion of the actuator cam and valve stem serves to relieve compression of the wave washer, followed by removal of the valve head from the valve seat.

Abstract: During normal operation of diesel engines the EGR valve poppet often becomes stuck to the valve seat in the closed position, due to excessive build up of exhaust gas debris, which renders the valve inoperable. This usually occurs after the engine is shut down and the valve is seated. Features, which locate the valve poppet in an unseated position when not in use, are implemented into the EGR valve design to prevent this sticking from occurring, thereby increasing product robustness and prolonging product life.

Abstract: An EGR control valve is disposed on a V-type internal combustion engine such that the engine is compact as a whole. In the internal combustion engine, cylinders are provided with the cylinders spaced apart from each other in a V-shape, and exhaust gas obtained from an exhaust port of the rear cylinder is supplied to intake ports of the respective cylinders via a single EGR control valve through exhaust-gas supply channels having a branching chamber. The EGR control valve is provided in a V bank space between the cylinders. In addition, the EGR control valve is disposed at the rear of the front cylinder, so that the cooling of the EGR control valve due to exposure to the wind caused by vehicle travel is inhibited, and the exhaust gas is maintained at a high temperature during recirculation.

Abstract: The present invention relates to an exhaust gas recirculation device (6) for an internal combustion engine (1), in particular in a motor vehicle. The exhaust gas recirculation device (6) includes a recirculation line (7) and a fresh gas line section (8) in which a Venturi nozzle (10) is designed in its inlet area (9). The recirculation line (7) opens into the fresh gas line section (8) in a low pressure area (11) of the Venturi nozzle (10). To allow exhaust gas recirculation in the largest possible operating range of the internal combustion engine (1), the Venturi nozzle (10) has a variable flow cross section.

Abstract: A dual-poppet valve comprising a valve body having spaced-apart coaxial valve seats and being arranged such that first and second poppets both open into the primary chamber. A first pintle shaft engages the first poppet, and a second pintle shaft engages the second poppet. A motorized actuator having a gear transmission includes a pinion gear. The pintle shafts include opposing gear racks, and the pinion gear engages both racks. Thus, rotation of the pinion gear in a first direction causes both poppets to be lifted from their seats simultaneously, in opposite directions; and counter-rotation engages each poppet with its respective seat. In closing, one poppet engages its seat slightly before the other poppet engages the other seat. The first pintle slides through the first poppet until the second poppet is fully seated by the actuator. The force of the spring fully engages the first poppet with the first seat.

Abstract: An engine system (100) has a valve system (137). An inlet of a turbine (109) is fluidly connected to a first inlet (119) of the valve system (137). An outlet of the turbine (123) is fluidly connected to a second inlet (113) of the valve system (137). An outlet of a compressor (155) is fluidly connected to a first outlet (115) of the valve system (137). An inlet of the compressor (141) is fluidly connected to a second outlet (111) of the valve system (137). An inlet of an exhaust gas recirculation system (133) is fluidly connected to a third outlet (121) of the valve system (137), and an outlet of the exhaust gas recirculation system is fluidly connected to a third inlet (117) of the valve system (137).

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 rotary arm-actuated pintle valve assembly having a pintle valve seat, a pintle shaft, and a valve head forming a pintle valve for regulating flow of gas through a valve body. The shaft extends through a port in a wall of the body. A rotary-arm actuator mounted to the body includes an oscillating motor and shaft. An arm mounted on the motor shaft engages the outer end of the pintle shaft and causes the pintle shaft to reciprocate to open and close the valve. The port permits the pintle to move back and forth radially during actuation of the valve. A floating bearing assembly at the port receives the pintle and slides back and forth as directed by the pintle, all the while maintaining a pneumatic seal around the pintle. A centering element is provided within the valve body to guide the pintle in mating the head with the seat.

Abstract: In order to minimize pollutants such as Nox, internal combustion engines typically include an exhaust gas recirculation (EGR) valve that can be used to redirect a portion of exhaust gases to an intake conduit, such as an intake manifold, so that the redirected exhaust gases will be recycled. It is desirable to have an EGR valve with fast-acting capabilities, and it is also desirable to have the EGR valve take up as little space as possible. An exhaust gas recirculation valve is provided that includes an exhaust passage tube, a valve element pivotally mounted within the exhaust passage tube, a linear actuator; and a gear train. The gear train includes a rack gear operatively connected to the linear actuator, and at least one rotatable gear meshing with the rack gear and operatively connected to the valve element to cause rotation of the valve element upon actuation of the linear actuator. The apparatus provides a highly compact package having a high-speed valve actuation capability.

Abstract: The invention relates to an exhaust gas recirculation device for an internal combustion engine, especially for a motor vehicle, comprising an exhaust gas recirculation line for recirculating exhaust gas, the line branching off from the exhaust line and running into an unburned gas line. The exhaust gas recirculation line includes a valve having a closing element which can be displaced between a closing position and an opening position by means of an actuator. One aim of the invention is to especially reliably prevent the closing element of the valve from sticking to the valve seat after the operation of the internal combustion engine. To this end, the closing element of the valve is placed in an idle position by means of the actuator, when the internal combustion engine is not in operation.