Abstract: Methods and systems are provided for indicating whether a wastegate positioned in a vehicle exhaust system is stuck in a closed or open configuration. In one example, a method comprises activating an electric air compressor positioned in an intake of the engine and obtaining a first baseline air flow and a second baseline air flow in the exhaust system, and in response to an indication that the wastegate is potentially stuck open or closed, obtaining a test air flow measurement via activating the electric air compressor and comparing the test air flow in the exhaust system to the first and/or the second baseline air flow. In this way, the wastegate may be diagnosed under conditions of limited engine operation, such as that which may occur in hybrid electric vehicles.

Abstract: A smooth shift is achieved between an operating region in which a first turbocharger is mainly operated and an operating region in which a second turbocharger is mainly operated. A PCM controls a throttle valve to use a first supercharging region in which a gas flow through an exhaust bypass passage is reduced and a second supercharging region in which the gas flow through the exhaust bypass passage is promoted differently based on the operating state of an engine. In an early stage of a shift from the first supercharging region to the second supercharging region, the PCM executes bridge control to allow the flow velocity of exhaust gas flowing into a large turbine to be higher than at a point in time at which the shift starts.

Abstract: A turbocharger having a swing vane nozzle assembly—VGT—is provided. The turbocharger includes a turbine housing and a bearing housing. The swing vane nozzle assembly includes a front nozzle ring, a rear nozzle ring, and a plurality of pivotable gas flow control vanes arranged between the front nozzle ring and the rear nozzle ring. The rear nozzle ring is radially guided by the turbine housing, a radially outer portion of the front nozzle ring is clamped between the bearing housing and the turbine housing thus forming an axial guidance of the front nozzle ring, and an inner periphery of the front nozzle ring is arranged at a distance from the bearing housing.

Abstract: A control device is provided capable of reliably preventing occurrence of a surging state by judging a possibility of the surging state in a relatively easy manner and promptly executing a surging state avoidance control. When a supercharging pressure decreasing state in which a target supercharging pressure decreases is detected, an operating speed of a wastegate valve is determined based on a detected engine rotational speed. That is, by lowering the operating speed as the engine rotational speed lowers, reduction in flow rate of the air passing through a compressor is prevented, and the occurrence of the surging state is reliably prevented. By lowering the operating speed instead of changing a target opening degree of the wastegate valve, a maximum opening degree of the wastegate valve can be suppressed, and responsiveness in the case where an acceleration request is made immediately after deceleration of an engine can be improved.

Abstract: A wastegate assembly for a turbocharger includes a valve element having a valve body and a shaft extending away from the valve body. A spindle is coupled to the shaft for moving the valve element between a first and a second position to control the flow of exhaust gas to a turbine housing interior of the turbocharger. A washer is coupled to the shaft such that the spindle is disposed between the valve body and the washer for retaining the spindle to the shaft. A biasing member is disposed between the spindle and the washer, has a trough portion extending toward the spindle, and has a crest portion extending toward the washer. At least one of the spindle and the washer define a seating groove and the biasing member extends at least partially into the seating groove to seat and prevent rotation of the biasing member.

Abstract: While an actuator is driven by an actuator driving unit with an operation amount for which the maximum value is limited by an operation amount limitation unit, if a state in which the actual opening degree of a wastegate valve does not coincide with a target opening degree has continued for a predetermined time period, driving by the actuator driving unit is attempted with an operation amount for which the maximum value limitation is relaxed by an operation amount limitation relaxing unit. Even after this, if the state in which the actual opening degree of the wastegate valve does not coincide with the target opening degree still has not been eliminated, an abnormality determination unit determines that abnormality has occurred in an opening degree control system for the wastegate valve.

Abstract: Methods and systems are provided for a close-coupled aftertreatment device. In one arrangement, a system may include an engine comprising separate first and second overall exhaust lines, where a blow-off line branches off of the second overall exhaust line, and where the close-coupled aftertreatment device is arranged in the blow-off line and configured to receive exhaust gases during at least a cold-start of the engine.

Abstract: An exhaust gas receiver 21 is provided between an expanded passage portion 132 of an upstream connection member 13 and a catalyst end surface 111. The exhaust gas receiver 21 extends along the entire circumference of a catalyst accommodation case 12. The exhaust gas receiver 21 extends from an upstream opening end portion 121 of the catalyst accommodation case 12 toward an inner part of the passage of the expanded passage portion 132 such that the exhaust gas receiver 21 separates from the expanded passage portion 132, and a space 211 is defined between the exhaust gas receiver 21 and the catalyst end surface 111. Flows of bypass exhaust gas hitting against the catalyst end surface 111 and bouncing off the catalyst end surface 111 hit against and are received by the exhaust gas receiver 21.

Abstract: When a waste gate valve (7) is forcibly fully closed for learning control at the time of start, the drive force of an electric actuator (20) is initially set to a large first level, and when a predetermined position (L1) immediately before seating is reached, the driving force is reduced to a second level. As a result, a valve body (7a) is gently seated. When a predetermined time (TM1) passes, the driving force is increased to a third level. Consequently, the electric actuator (20) presses the valve body (7a) onto a seat surface (34a) while displacing a spring member (37). As a result, a reliable sealability is obtained.

Abstract: An exhaust valve rocker arm assembly selectively opening first and second exhaust valves. The assembly includes an exhaust rocker arm and a valve bridge operably associated with the rocker arm and including a main body and a lever rotatably coupled to the main body. The main body is configured to engage the first exhaust valve, and the lever is configured to engage the second exhaust valve.

Abstract: Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation to an intake passage via a first exhaust manifold and exhaust gas to an exhaust passage via a second exhaust manifold. In one example, each of a first valve positioned in an exhaust gas recirculation (EGR) passage, the EGR passage coupled between the intake passage and the first exhaust manifold coupled to a first set of cylinder exhaust valves, and a second valve positioned in a flow passage coupled between the first exhaust manifold and the exhaust passage may be adjusted based on a measured pressure in the first exhaust manifold.

Abstract: A waste gate valve (7) of a turbocharger (3) is fully opened during idling after warm-up is completed in order to reduce exhaust resistance. However, during idling in an engine cold state when a cooling water temperature (TW) is below a threshold value (TW1), the waste gate valve (7) is open-loop controlled to an intermediate opening degree that is smaller than full opening. An ignition timing is delayed (retarded) for catalyst warm-up. When the cooling water temperature (TW) reaches (t3) the threshold value (TW1), the opening degree of the waste gate valve (7) is set to full opening. When an accelerator opening degree (APO) becomes large (t4) before warm-up is completed, the limitation of the opening degree is released.

Abstract: A turbine for an exhaust turbocharger has a dual branch turbine housing and valve arrangement for branch connection and waste gate control. The turbine for an exhaust-gas turbocharger, having a turbine housing which has two exhaust-gas volutes through which an exhaust gas mass flow can flow and between which there is provided a separating wall and having a linear valve which has a valve element and a displacement shaft. The displacement shaft is guided through the separating wall and is arranged movably in the direction of its shaft longitudinal axis in the separating wall. The displacement shaft and the valve element are separate components which are connected to one another such that a compensation of positional and dimensional tolerances between displacement shaft and valve element during operation is made possible.

Abstract: A turbocharger system includes a valve member disposed between plural volute passages of a turbine section and a wastegate. The valve member is supported for rotation about an axis of rotation between various positions. The valve member, in a first position, provides a cross flow path between the first volute passage and the second volute passage and provides a bypass flow path from at least one of the first and second volute passages to the wastegate. In a second position, the valve member provides the cross flow path and substantially prevents flow along the bypass flow path. In a third position, the valve member substantially prevents flow along the cross flow path and the bypass flow path. The valve member includes at least internal one valve passage and plural apertures that fluidly connect or alternatively fluidly disconnect the volute passages and wastegate in the first, second, and third positions.

Abstract: A conduit connection assembly includes a first conduit part and a second conduit part, assembled to form a conduit connection delimiting a first fluid conducting volume from a second fluid conducting volume. The first and second fluid conducting volumes communicate with each other via a pressure change inducing device. During use of the conduit connection assembly, the pressure in the first conducting volume is higher than the pressure in the second conducting volume. A cavity is formed between the first and second conduit parts at a distance from the first fluid conducting volume, and a draining connection is adapted to provide a communication between the cavity and the second fluid conducting volume. A slot, formed by the assembly of the two conduit parts, provides a communication between the first fluid conducting volume and the cavity.

Abstract: A rotor rotatably mounted within a turbocharger housing includes a turbine wheel and a shaft. The shaft connects the turbine wheel. The hub defines a turbine-wheel back-disk surface facing the portion of the housing containing the bearings, and the hub defines a blade-side surface. The turbine hub and the housing define a turbine-wheel back-disk cavity. The turbine hub forms a ring-shaped primary axial protrusion extending circularly around the turbine-wheel back-disk surface into a circular channel in the housing. The circular channel leads into a bypass that bypasses the turbine blades. A relief flow valve is placed in the bypass. The relief control valve is controlled to open when the bypass pressure is above a cutoff pressure, and close when it is below the cutoff pressure.

Abstract: An exhaust gas guide section for an exhaust gas turbocharger includes an actuator (1) with a wastegate (9) for opening and closing a bypass channel (31) of the exhaust gas guide section (1), wherein the bypass channel (31) is provided in the exhaust gas guide section (1) that can be flowed through to bypass a turbine wheel of the exhaust gas guide section (1) which is rotatably arranged in the exhaust gas guide section (1) in a wheel chamber of the exhaust gas guide section (1), and wherein the bypass channel (31) has a second flow cross section (33).

Abstract: A variable geometry turbine having a wastegate includes a turbine housing, a power turbine, and a regulating valve. The turbine housing is provided with an inner intake gas flow channel and an outer intake gas flow channel. The turbine housing is further provided with a wastegate pipeline configured to bypass the power turbine, and a wastegate valve configured to control communication of the wastegate pipeline. One of the regulating valve and the wastegate valve has a regulating face having a varying axial height in a rotation direction of the regulating valve, and the other of the regulating valve and the wastegate valve has a linking portion which makes contact and cooperates with the regulating face. Thus, the efficiency of the turbine is improved significantly and backflow of the gas flow is reduced.

Abstract: A secondary air injection system may include an engine that includes a plurality of cylinders that generate a driving torque of a vehicle by combustion of a fuel; a main line connected to an exhaust manifold or an exhaust line which is connected to the plurality of cylinders; a recirculation line which is branched from the main line and then connected to an intake manifold; an air injection line which is branched from the main line and then connected to an intake line; and an electric supercharger which is provided in the intake line.

Abstract: A nozzle drive mechanism includes: a plurality of nozzle vanes; a plurality of link plates each fixed to a shaft portion of one of the plurality of nozzle vanes; a nozzle ring having an annular main body portion including shaft holes, each of which pivotally supporting a shaft portion of one of the nozzle vanes, the nozzle ring arranged between the link plates and the nozzle vanes; a regulation pin having one end attached to the main body portion of the nozzle ring and the other end protruding from an opposing surface of one of the link plates facing the nozzle ring; and a positioning pin provided separately from the regulation pin and assembled to a wall portion positioned opposite to the nozzle ring across the link plate at a position where the positioning pin is brought into contact when the nozzle ring rotates.

Abstract: A control system includes a turbocharger having an exhaust air control device, sensors, and a controller for controlling a closing amount of the turbocharger using a cold data map. The exhaust air control device includes at least one of a waste gate or a vane angle control device. The controller performs a cold control step to control the closing amount to be a cold closing amount preset for a cold control when a vehicle condition satisfies a cold control condition. The controller also performs a cold data map application step to continuously change the closing amount while limiting a change rate of the closing amount of the turbocharger immediately after the cold control step to a predetermined reference change rate or lower, thereby preventing rapid changes in an engine RPM.

Abstract: The present invention relates to a manifold for receiving exhausts from a multi-cylindrical internal combustion engine. The internal combustion engine has such a firing order that the riser in the manifold receives exhausts from two cylinders during an overlapping stage, simultaneously via an inlet opening arranged upstream and from an inlet opening arranged downstream in the riser. The riser comprises a substantially constant cross sectional area, except in one area, which is located in a position in connection with the inlet opening arranged downstream of the two inlet openings, receiving exhausts simultaneously. Said area has a geometry facilitating receipt and flow of exhausts in the predetermined direction in the riser, on occasions when the two inlet openings receive exhausts simultaneously.

Abstract: A wastegate valve of a turbocharger includes a swing arm that includes a shaft and a lever including an insertion hole, a valve body including a valve shaft inserted into the insertion hole and a valve plate arranged on an end of the valve shaft, a support plate fixed to a portion of the valve shaft protruding out of the insertion hole, and an elastic member arranged between the support plate and the lever or the lever and the valve plate. The elastic member includes a ring, claws curved toward a first side in an axial direction of the ring, and a projection projecting from the ring toward the first side. The projection length of the projection is smaller than a distance obtained by subtracting the thickness of the lever from the distance between the valve plate and the support plate in the axial direction of the valve shaft.

Abstract: A method for determining the state of loading of a particle filter in an exhaust system of a turbocharged internal combustion engine is provided. To determine the state of loading, a position of a control mechanism of the turbine of the exhaust turbocharger is detected and compared with the position during operation of the internal combustion engine with the same operating parameters with the particle filter unladen. An air mass meter is provided in order to be able to distinguish a change in the pressure situation at the turbine of the exhaust turbocharger due to a rise in the exhaust gas backpressure owing to increasing loading of the particle filter from a change in the pressure situation owing to leakage of the air supply system. An internal combustion engine having a control unit which is configured to carry out such a method is also provided.

Abstract: Methods and systems are provided for operating an electric assisted turbocharger. In one example, a method may include adjusting a position of a turbine of the turbocharger responsive to a level of a power deficiency, and operating an electric motor of the turbocharger based on the power deficiency.

Abstract: Provided is an engine control device capable of, when performing control of an in-cylinder oxygen concentration according to engine operation state, controlling an engine to accurately realize vehicle behavior intended by a driver, while suppressing generation of knock noises due to abnormal combustion.

Abstract: A turbocharger includes a turbine housing. The turbine housing includes an interior surface defining a turbine housing interior. The interior surface extends between a turbine housing inlet and a turbine housing outlet. The turbine housing also includes a wastegate duct disposed between the turbine housing inlet and the turbine housing outlet and defining a wastegate channel in fluid communication with the turbine housing inlet and the turbine housing outlet. The turbocharger also includes a valve seat and wastegate assembly including a valve movable between a first position and a second position. The turbocharger further includes a diffuser at least partially surrounding the valve seat for uniformly diffusing the flow of exhaust gas into the turbine housing outlet.

Abstract: A variable-geometry turbocharger (VGT) for an internal combustion engine configured to generate a flow of post-combustion gases as a byproduct of generating output torque includes a turbine housing defining a volute. The VGT also includes a turbine wheel mounted on a shaft having a rotational axis, retained inside the turbine housing, and configured to be rotated about the rotational axis by the flow of post-combustion gases. The turbine housing defines an inlet to the turbine wheel downstream of the volute and upstream of the turbine wheel. The inlet to the turbine wheel includes a circumferentially continuous and unobstructed intake channel having a selectable cross-sectional area and configured to regulate effective expansion ratio of the VGT. An internal combustion engine employing such a VGT is also disclosed.

Abstract: A control system for an internal combustion engine includes an exhaust gas passage, an intake passage, a turbocharger, a bypass passage, a waste gate valve, a turbo bypass valve, a throttle valve, and an electronic control unit. The electronic control unit is configured to control the waste gate valve, the turbo bypass valve, and the throttle valve such that the order of execution of the throttle opening degree increase control and the turbo bypass valve opening degree increase control and the waste gate valve opening degree decrease control is changed depending on the engine load at a point in time when the operation state of the internal combustion engine belongs to the natural aspiration region when the predetermined acceleration request is present.

Abstract: In an exhaust system for an internal combustion engine which is constructed such that when a degree of opening of a waste gate valve is equal to or larger than a predetermined degree of opening, the bypass exhaust gas flows so as to direct to a predetermined portion on the upstream side end face of the exhaust gas purification catalyst, and that the exhaust gas sensor is arranged in a specific passage, which is an exhaust passage between a turbine and the exhaust gas purification catalyst, the exhaust gas sensor is arranged to be away, a first distance or more in a direction orthogonal to an axial direction of the exhaust gas purification catalyst, from a region (scattering region B) in which the predetermined portion is virtually extended to a side of the specific passage along the axial direction of the exhaust gas purification catalyst.

Abstract: A supercharging system for an internal combustion engine controls an intake flow-passage switching valve and an exhaust flow-passage switching valve disposed in an intake flow passage and an exhaust flow passage, respectively, on the basis of a first control index which is calculated on the basis of a target boost pressure calculated on the basis of an operational state of the internal combustion engine and an actual boost pressure. The first control index is calculated from an arithmetic expression including opening degrees of the intake flow-passage switching valve and the exhaust flow-passage switching valve as variables.

Abstract: A control device for an internal combustion engine including a turbocharger and a negative-pressure waste gate valve includes an electronic control unit configured i) to apply a first drive current value to a pressure regulation valve so as to maintain an opening degree of the waste gate valve in a fully closed state in a case where an actual boost pressure is lower than a target boost pressure and a boost pressure difference between the actual boost pressure and the target boost pressure is equal to or larger than a threshold, and ii) to apply a second drive current value that is smaller than the first drive current value to the pressure regulation valve in a case where the actual boost pressure is lower than the target boost pressure and the boost pressure difference is smaller than the threshold.

Abstract: A turbocharger includes a turbine housing and a wastegate. The turbine housing has an accommodation space, is which a turbine wheel is accommodated. The accommodation space is connected to a scroll passage, which draws exhaust gas from the outside of the turbine housing, and a connection passage, which discharges exhaust gas from the accommodation space. The connection passage is connected to a merging passage, which discharges exhaust gas to the outside of the turbine housing. The merging passage is connected to a bypass passage, which bypasses the accommodation space. The central axis of an outlet portion of the connection passage is inclined with respect to the rotation axis of the turbine wheel toward the side on which an outlet portion of the bypass passage is located.

Abstract: A lubrication system and method for an engine arc provided. In some embodiments, the lubrication method comprises driving a lube pump with a gearbox in a power drive housing, the gearbox including an expander shaft of an expander of a waste heat recovery system; suctioning lubrication fluid, with the lube pump, from a lube sump in the power drive housing; lubricating, with the lubrication fluid, an expander shall bearing supporting the expander; and after lubricating the expander shall bearing, transferring the lubrication fluid to the lube sump waste heat recovery power drive and lubrication system therefor.

Abstract: A valve is provided fitted into a mounting hole of a mounting member. The valve is allowed to have play with respect to the mounting member. The valve includes a valve body having a valve surface capable of being brought into contact with and being separated from a valve seat. A valve shaft is integrally formed on a head of the valve body. An axial center of the bypass passage is inclined with respect to a thickness direction of an inner wall portion of a turbine housing so that an opening portion on an outlet side in the bypass passage is located closer to a stem side than an opening portion on an inlet side. A center of the valve surface of the valve body is eccentric to the stem side with respect to an axial center of the valve shaft.

Abstract: Methods and systems for operating an engine during and after regeneration of a particulate filter are described. In one example, exhaust flow is increased and exhaust temperature is decreased in response to ceasing regeneration of a particulate filter so that SCR efficiency may be improved in a short amount of time.

Abstract: An apparatus for suppressing a surge of a turbo compressor is provided. The apparatus includes a compressor housing having a compressor wheel provided therein and an inlet having air flowing thereinto and protruding from a first opposite to the compressor wheel. A connection module has a first side connected to the compressor housing to communicate with the inlet and a second side that includes an inlet for supplying air. A flexible cone of an elastic material is disposed in the connection module and is formed in a conical shape having sizes of cross-sectional areas of a first side and a second side that are different from each other. A spring member is coupled to an exterior circumferential surface of the flexible cone to provide an elastic force and operated to change a size of a cross-sectional area of the first or second side of the flexible cone.

Abstract: Methods and systems are provided for exhaust gas heat recovery at an exhaust gas heat exchanger. Exhaust gas may flow in both directions through an exhaust bypass passage and the heat exchanger coupled to the bypass passage. Hot or cold EGR may be delivered from the exhaust passage to the engine intake manifold and heat from the exhaust gas may be recovered at the heat exchanger.

Abstract: The present invention provides a controller and a control method for an internal combustion engine, which can suppress the generation of an annoying collision noise and abnormal heating of a motor of an actuator, which are generated by contact of the output shaft of the actuator with an opening side stopper of the actuator. The controller and the control method for the internal combustion engine are configured such that a target opening (Sv) of the valve is set to the smaller of: a required target opening (Sv_dem) computed so that a target supercharging pressure (Sp) and an actual supercharging pressure (Pp) are matched with each other; and a restricted target opening (Sv_lmt) computed based on a fully closed position learning value (Pv_lrn), which corresponds to an actual position detected by a position sensor, when the valve is located in the fully closed position, and on the restricted target position.

Abstract: The present disclosure relates to internal combustion engines. The teachings thereof may be embodied in methods and devices for actuating an exhaust gas recirculation valve of a forced-induction internal combustion engine with exhaust gas recirculation. A method for building up the charge pressure required to avoid a drop in torque may include: detecting an acceleration indicator; in response, providing an increased target value for an exhaust gas recirculation rate; measuring an instantaneous actual charge pressure; determining a setpoint exhaust gas recirculation rate based on the increased target value, the instantaneous setpoint charge pressure, and the instantaneous actual charge pressure; calculating a control signal using the determined setpoint exhaust gas recirculation rate; and delivering the control signal to the exhaust gas recirculation valve to change its opening state.

Abstract: Provided is a diaphragm type actuator that drives an operation rod in an axial direction of the operation rod, including: a diaphragm which is connected to the operation rod; a low pressure chamber which is adjacent to one end side of the diaphragm in the axial direction; a high pressure chamber which is adjacent to the other end side of the diaphragm in the axial direction; a return spring which is provided in the low pressure chamber and urges the diaphragm toward the high pressure chamber; and a retainer which is provided on a surface near the high pressure chamber in the diaphragm. An elastic member is disposed inside the high pressure chamber and the elastic member is disposed between a retainer and a wall surface facing the retainer in the axial direction.

Abstract: A variable geometry turbine assembly comprising an inlet passageway, extending radially inwards towards a turbine wheel, defined between a surface of a movable wall member and a facing wall and an actuation mechanism arranged to move the movable wall member axially and comprising a cam member provided with at least one formation and a carrier member axially coupled to at least one co-operating formation, wherein one of the at least one formation and the at least one co-operating formation is a radially extending formation, the at least one formation or the at least one co-operating formation extending in both the circumferential direction and the axial direction such that as the cam member is rotated relative to the carrier member, the at least one formation and the at least one co-operating formation engage such the movable wall member is moved in the axial direction.

Abstract: Methods and systems are provided for warming an engine and/or engine fluids. In one example, a method may comprise powering on an electric motor of an intake boost device to generate heat, circulating coolant and/or engine oil through the boost device to absorb the heat produced by the boost device, and then flowing the coolant and/or engine oil to the engine to transfer the heat absorbed from the boost device to the engine. In this way, an engine may be warmed without running the engine rich by using the heat generated by the electric motor of the boost device to warm the engine.

Abstract: A turbocharger includes a bearing portion having an end as an inner end surface located within a turbine housing in a penetrating direction of a bearing hole; a shaft rotatably supported in the bearing hole, one end thereof located within the turbine housing and the other end thereof located outside the turbine housing; an attaching plate fixed to the shaft, including an inner facing surface facing the inner end surface in an axial direction of the shaft; and a valve coupled to the shaft via the attaching plate to open and close a flow path opened to an internal space of the turbine housing. An inner radial groove is formed in at least one of the inner end surface and the inner facing surface. The inner radial groove extends in the radial direction of the shaft to allow a part of an exhaust gas flowing within the turbine housing to flow therethrough.

Abstract: Methods and systems are provided for a boosted engine system having an engine arranged to receive boosted air from a variable geometry turbocharger and an electrically powered compressor arranged in parallel with the turbocharger. During temporary high torque demands above a predefined level, the electrically powered compressor may be used to supplement the flow of boosted air from the turbocharger. Additionally, a recirculation circuit around the electrically powered compressor may be provided to build up pressure in the electrically powered compressor before it is connected to the engine so as to minimize fluctuations in engine boost pressure upon start-up of the electrically powered compressor.

Abstract: A method for employing learnable boundary positions for bounding operation of a robotic vehicle may include detecting temporary indicia of a boundary on a parcel via at least one sensor of a robotic vehicle, generating coordinate or location based boundary information 5 based on the temporary indicia, and operating the robotic vehicle within the boundary based on the generated coordinate or location based boundary information.

Abstract: A connecting pin is integrally provided at a distal end portion of an actuating rod of an actuator, a pin hole for allowing insertion of the connecting pin is penetrated and formed at a distal end portion of the link member, an annular wave spring for biasing the connecting pin to a center side of the pin hole is provided inside the pin hole of the link member, the wave spring is fitted into a circumferential groove of the connecting pin and alternately has a plurality of convex portions and a plurality of concave portions along its circumferential direction, each of the convex portions of the wave spring is brought into pressure contact with an inner circumferential surface of the pin hole, and each of the concave portions of the wave spring is brought into pressure contact with a bottom surface of the circumferential groove of the connecting pin.

Abstract: A control device of an internal combustion engine, includes: a boost pressure detector to detect a boost pressure of air pressurized by a compressor of a supercharger including a turbine; and a processor configured to determine a rapid decrease in a target boost pressure; determine that an execution condition is satisfied in a case where the target boost pressure rapidly increases immediately after the rapid decrease is determined while the exhaust gas is refluxed; calculate a restriction opening control amount for an exhaust gas flow amount variable device to control a flow amount of the exhaust gas blown to the turbine so as to regulate a changing speed of an opening control amount to decrease an opening of the exhaust gas flow amount variable device when the execution condition is satisfied; and control the opening of the exhaust gas flow amount variable device according to the restriction opening control amount.

Abstract: A required opening correction amount is calculated based on a target supercharging pressure and an actual supercharging pressure, a target opening is calculated based on a required opening and the required opening correction amount, an actual operating position of a wastegate valve is determined to correspond to a fully closed position when the wastegate valve is in a fully closed condition, an actual opening of the wastegate valve is calculated based on the fully closed position and the actual operating position, an operation amount of an actuator for aligning the target opening with the actual opening is calculated based on the target opening and the actual opening, and when the target opening corresponds to the fully closed condition and the actual operating position is not decreased at or above a prescribed rate, the fully closed position is updated to the actual operating position.

Abstract: A control device (10) for a supercharging system for supplying compressed intake air to an engine (6) includes: an engine controller (10A) including an engine signal input part (10A1) and an engine control part (10A2) configured to control an operational state of the engine and to compute a target boost pressure of a supercharger (4); and a turbo controller (10B2) including a turbo signal input part (10B1) and a turbo control part (10B2) configured to compute a margin of the supercharger. The control device is configured to compute a target boost-pressure corrected value by correcting the target boost pressure in accordance with a magnitude of the margin computed by the turbo control part, and to control a boost-pressure control unit (12) so that the boost pressure of the supercharger reaches the target boost-pressure corrected value.