Abstract: A compression self-ignition engine performs a SI combustion in which an air-fuel mixture is combusted due to flame propagation triggered by spark ignition, and a CI combustion in which the air-fuel mixture is combusted due to self-ignition induced by the flame propagation. An ECU comprises a first control means for controlling a SI ratio serving as an index relating to a ratio of a heat amount generated in the SI combustion with respect to a total heat amount generated in the SI and CI combustions or a heat amount generated in the CI combustion; and a second control means for controlling an in-cylinder temperature before the SI combustion. The ECU is configured to change a combustion state of each of the SI and CI combustions by both the first and second control means according to the operating state of the engine.

Abstract: A heat exchanger system includes a radiator and a charge air cooler. The charge air cooler includes two interconnected cores, being a first core mounted next to the radiator and a second core mounted upstream of the radiator so that air output from the first core does not pass through the radiator.

Abstract: Methods and systems are provided for controlling boost pressure in a staged engine system comprising a turbocharger and an upstream electric supercharger. In one example, a method may include coordinating the operation of the electric supercharger and an electric supercharger bypass valve and to open the electric supercharger bypass valve to reduce the extent and duration of electric supercharger overboost.

Abstract: A power supply device includes a first power supply circuit, a second power supply circuit, and a power supply-switching unit. The first power supply circuit includes a power storage device having a first capacity and supplies electricity of a first voltage to the electric motor. The second power supply circuit includes a power storage device having a second capacity smaller than the first capacity and supplies electricity of a second voltage higher than the first voltage to the electric motor. The power supply-switching unit supplies electricity from the second power supply circuit to the electric motor at the tune of starting an operation of the electric motor and thereafter supplies electricity from the first power supply circuit to the electric motor.

Abstract: A turbocharging system for an internal combustion engine includes a turbocharger having a shaft supported for rotation about an axis. The turbocharger also includes a turbine wheel mounted on the shaft and configured to be rotated about the axis by the exhaust gas, and a compressor assembly mounted on the shaft and configured to pressurize an airflow received from the ambient for delivery to the cylinder. The turbocharging system additionally includes an electric motor configured to generate electric motor torque. The turbocharging system further includes a one-way clutch configured to selectively connect the electric motor to the compressor assembly, such that the electric motor torque assists the turbocharger in generating boost pressure. An internal combustion engine employing such a turbocharging system is also disclosed.

Abstract: A variable displacement exhaust turbocharger is provided with a plurality of nozzle vanes that are rotatably supported by a nozzle mount, a drive ring that is interlocked with an actuator and fits to a guide part of the nozzle mount, a lever plate having one end coupled to the drive ring and the other end coupled to the nozzle vane, and a variable nozzle mechanism that varies the vane angle of the nozzle vane by rotating the drive ring. A bulge suppressing portion is provided for absorbing bulging occurring on an outer peripheral surface of the guide part, the bulging being caused by the press-fitting of a nail pin into a press-fitting hole in a direction slightly toward the rotational axis with respect to the guide section and following the axial direction of the nozzle mount.

Abstract: A surge avoidance control method that includes a surge detection step of determining whether the operation point of the compressor is positioned in a surge operation region at each predetermined timing; a surge avoidance opening-degree calculation step calculating a surge avoidance opening degree of the operation device necessary for moving the operation point of the compressor determined to be positioned in the surge operation region in the surge detection step out of the surge operation region; a correction opening-degree calculation step calculating a correction opening degree of the operation device on the basis of a moving velocity of the operation point of the compressor which is determined to be positioned in the surge operation region in the surge detection step; and an opening-degree command value calculation step calculating an opening-degree command value of the operation device on the basis of the surge avoidance opening degree and the correction opening degree.

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: In a vehicle, a rod of a waste gate valve actuator reciprocates along a virtual plane which is parallel to both the central axis of a connecting shaft of a turbocharger and the cylinder axis of a cylinder hole. When viewed in the left or right direction of the vehicle, a main catalyst of a catalyst portion is provided forward of the cylinder axis of the cylinder hole. The flow direction of the exhaust gas in the main catalyst intersects with the reciprocating direction of the rod of the waste gate valve actuator when viewed in a direction orthogonal to both the central axis of the connecting shaft of the turbocharger and the central axis of the cylinder hole.

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 compressor for a turbocharger includes an inlet-adjustment mechanism in an air inlet for the compressor, operable to move between an open position and a closed position. The inlet-adjustment mechanism includes a plurality of blades disposed about the air inlet, the blades being movable radially inwardly from an annular space of the air inlet wall, into the air inlet, so as to form an orifice of reduced diameter relative to a nominal diameter of the inlet. A noise-attenuator is disposed in the annular space, downstream of the inlet-adjustment mechanism, for attenuating aerodynamic noise induced by the inlet-adjustment mechanism when it is closed.

Abstract: A compound engine assembly with an inlet duct, a compressor, an engine core including at least one internal combustion engine, and a turbine section including a turbine shaft configured to compound power with the engine shaft. The turbine section may include a first stage turbine and a second stage turbine. The turbine shaft and the engine shaft are parallel to each other. The turbine shaft, the engine shaft and at least part of the inlet duct are all radially offset from one another. A method of driving a rotatable load of an aircraft is also discussed.

Abstract: A switch valve for controlling a hydraulic fluid flow, the switch valve comprising a tapping element that is arranged in a valve housing, wherein the tapping element is displaceable into a first switching position or a second switching position and interlockable by a spring loaded interlocking element in the first switching position or the second switching position, wherein a first hydraulic connection is connected with a relief connection in the first switching position and a second hydraulic connection is connected with the relief connection in the second switching position, wherein a switching travel of the tapping element is limited, wherein the interlocking element is at least partially arranged in a recess of the tapping element, wherein the valve housing includes a first groove that is oriented in an axial direction of the valve housing and limited in the axial direction.

Abstract: A VCR apparatus may include a connecting rod at which a small end forming a hole having a circular shape to be rotatably connected with a piston pin moving together with the piston and a large end rotatably connected with a crank pin eccentrically arranged with respect to the crankshaft are formed; an eccentric cam concentrically arranged and rotatably disposed in the hole of the small end and configured so that the piston pin is eccentrically inserted thereinto and is rotatably connected therewith; a latching pin disposed in the small end to make a reciprocal rectilinear motion in a direction of rotation axis of the small end and operated to selectively latch the small end with the eccentric cam in one among at least two relative positions between the small end and the eccentric cam; and an acting oil passage formed at the connecting rod.

Abstract: Methods and systems are provided for a VCR engine. In one example, the VCR engine includes a VCR mechanism that relies on electric power to adjust a compression ratio of the VCR engine. The compression ratio is maintained by hydraulically-assisted engagement of a mechanical locking pin with an S-link of the VCR mechanism, holding a position of the VCR mechanism while an electric motor, used to adjust a position of the S-link, may be deactivated.

Abstract: A gas turbine engine system and method of operating gas turbine engines are provided. The gas turbine engine assembly includes a gas turbine engine includes a power shaft configured to rotate about an axis of rotation. The gas turbine engine assembly also includes a first fan and a second fan coupled to the power shaft coaxially with the gas turbine engine. The gas turbine engine assembly also includes a first fan duct configured to direct a first stream of air to the first fan. The gas turbine engine assembly also includes a second fan duct configured to direct a second stream of air to the second fan. The gas turbine engine assembly also includes an exhaust duct configured to direct a stream of exhaust gases of the gas turbine engine in a direction of the axis of rotation.

Abstract: A gas turbine engine includes a low pressure compressor, a high pressure compressor, a turbine, and a gearbox. The high pressure compressor includes a plurality of stages split into a forward portion and an aft portion. One or both of the forward portion and the aft portion of the high pressure compressor are driven by the turbine through a gearbox such that the forward portion and the aft portion may rotate at different speeds.

Abstract: Systems and methods are provided for combined cycle power generation while reducing or mitigating emissions during power generation. Recycled exhaust gas from a power generation combustion reaction can be separated using a swing adsorption process so as to generate a high purity CO2 stream while reducing/minimizing the energy required for the separation and without having to reduce the temperature of the exhaust gas. This can allow for improved energy recovery while also generating high purity streams of carbon dioxide and nitrogen.

Abstract: A diffuser for a gas turbine engine includes a diffuser housing that has a circumferential array of hollow struts that provide a cavity. The diffuser housing includes inlet and outlet apertures that are in fluid communication with the cavity. An opening on a trailing end of the struts is in fluid communication with the cavity. The diffuser housing is configured to introduce a fluid through the inlet aperture and receive a core flow through the opening. The fluid and core flow exit through the outlet aperture.

Abstract: Electrical power systems, including generating capacity of a gas turbine, where additional power is generated from an air expander and gas turbine simultaneously from a stored compressed air and thermal system.

Abstract: Noise attenuation structures, such as acoustic liners for gas turbine engines, are provided. For example, an acoustic liner comprises a face sheet, a backing sheet spaced apart from the face sheet, and a plurality of cavities defined between the face and backing sheets. The cavities are defined by cavity walls. A plurality of backing sheet walls extends from the backing sheet toward the face sheet. The backing sheet walls extend adjacent the cavity walls, and the backing sheet is movable with respect to the face sheet such that the cavities have a variable depth. Other embodiments of noise attenuation structures also are provided.

Abstract: A gas turbine engine includes a compressor section having a high pressure compressor and a core casing surrounding the compressor section and defining an inlet. The gas turbine engine also includes a cooling system for cooling air in or to the compressor section. The cooling system includes a fluid tank for storing a volume of cooling fluid and a fluid line assembly in fluid communication with the fluid tank. The fluid line assembly includes an outlet positioned upstream of the high pressure compressor and downstream of the inlet defined by the core casing for injecting cooling fluid into an airflow upstream of the high pressure compressor.

Abstract: A heat exchange system in a turbomachine that comprises a plurality of members and equipment to be cooled and/or lubricated, the heat exchange system includes a fluid circuit for cooling and/or lubricating the equipment, the heat exchange system being configured to bring the fluid circuit in thermal contact with a fluid, wherein the heat exchange system further includes an open work structure which is in thermal contact with at least one hot section of the fluid circuit and through which the fluid passes.

Abstract: A propulsion system including a gas turbine engine is disclosed herein. The propulsion system further includes a heat exchanger arranged outside the gas turbine engine and adapted to cool fluid from the gas turbine engine.

Abstract: A fuel manifold (10) configured to form a base support structure (12) to support a plurality of fuel nozzles (14) including a pilot fuel nozzle is provided. A restraining element (30) is arranged in the base support structure (12) to support the pilot fuel nozzle. Restraining element (30) is integrally formed with the base support structure. The restraining element being integrally formed with the base support structure is effective to arrange for an incremental thickness (34) in a portion (39) of a wall (34) interposed between the inner diameter (36) of restraining element (30) and respective proximate edges (40) of a number of pilot bolt holes (32) disposed around the restraining element.

Abstract: A face seal assembly includes a seal. The assembly also includes a seal carrier including a first seal wall, a second seal wall and a base seal wall, the first seal wall, the second seal wall and the base seal wall defining a groove for receiving the seal therein, the second seal wall extending radially outwardly to a non-uniform radial location.

Abstract: The present disclosure relates to a geared turbofan engine.

Abstract: An apparatus and a method for detecting a threshold vibration condition associated with the operation of a gas turbine engine are disclosed. The apparatus includes a vibration-sensitive trigger mounted to the gas turbine engine for monitoring engine vibration and configured to disturb a sensor signal when a threshold vibration condition is met. The method includes generating one or more sensor signals associated with an operating parameter of the gas turbine engine and providing the one or more sensor signals to a controller of the gas turbine engine; disturbing the one or more sensor signals provided to the controller in response to the threshold vibration condition being met; and detecting the disturbance in the one or more sensor signals provided to the controller and generating one or more output signals indicative of the detected disturbance.

Abstract: An angle detection mechanism to detect a rotation angle of a rotation body includes a first detection unit to cause a first output value to constantly change in response to an angle change of the rotation body in the entire region of a specific rotation range and to set a change quantity of the first output value relative to the angle change in a first rotation region of the specific rotation range to be greater than a change quantity in a non-first rotation region, and a second detection unit to cause a second output value to constantly change in response to an angle change and to set a change quantity of the second output value in a second rotation region including a rotation region different from the first rotation region to be greater than a change quantity in a non-second rotation region.

Abstract: Methods and systems are provided for using compression heating to heat a cylinder piston before cylinder combustion is resumed. Cylinder heating is achieved using combinations of slow unfueled engine rotation where the engine cylinders are heated via compression stroke heating, and slow compressor rotation where the cylinders are heated via compression heating. One or more intake or exhaust heaters may be concurrently operated to expedite cylinder heating.

Abstract: A control system for internal combustion engines having four valves per cylinder. An inlet valve and an exhaust valve are controlled by a basic camshaft. Another inlet valve and another exhaust valve are controlled by a control camshaft. The two camshafts are connected to a crankshaft and engine torque is managed by an electronic control unit. The system comprises a motor/generator unit, connected to the control camshaft; a differential, connected to the crankshaft and to the control camshaft; a control shaft, connected to the differential; an actuator, connected to the control shaft; a one-way restrictor valve connected to a shut-off valve and to the actuator; an oil circuit, connected to the actuator by means of the shut-off valve and a control solenoid that acts on the shut-off valve.

Abstract: Methods and systems are provided for providing exhaust gas recirculation to a naturally aspirated internal combustion engine. In one example, exhaust gas is recirculated to an engine intake via a dedicated scavenging manifold and a scavenging exhaust valve. The exhaust gas and fresh air that has not participated in combustion may be recirculated to engine cylinders even at high engine loads since the exhaust gas and fresh air is returned to the engine air intake at a pressure greater than atmospheric pressure.

Abstract: One exemplary embodiment is a system comprising a dual-fuel engine structured to selectably combust a first fuel type and a second fuel type, and an electronic control system in operative communication with the dual-fuel engine. The electronic control system is structured to control a transition of the dual-fuel engine from a dual-fuel mode to a single-fuel mode. After initiating the transition from the dual-fuel mode to the single-fuel mode, the control system stops provision of the second fuel type, requires combustion using control parameters configured for the dual-fuel mode until a transition ventilation condition is satisfied, permits non-emergency commanded engine shutdown only if the transition ventilation condition is satisfied.

Abstract: A vehicle system for mounting in a vehicle which includes a control device. The control device includes a calculation unit calculating a stopping rate which is a percentage an automatic stop in a predetermined period, and a charge controller. The charge controller performs charging relative to an electrical storage device from a power generator when a charging rate is lower than a predetermined charging rate. The charge controller also controls the power generator such that the charging rate to the electrical storage device is increased with an automatic restart.

Abstract: At least some implementations of a method of distinguishing between two loads being driven by an engine, includes the steps of determining engine speed at defined intervals, comparing a second engine speed against a previously determined first engine speed, determining if the second engine speed fits an expected pattern of engine speeds, and counting either the number of incidents where the second engine speed does not fit the expected pattern, or the number of incidents where the second engine speed does fit the expected pattern, or some combination of these two. A method of determining if an engine is operating at least near a lean limit of its air to fuel ratio is also disclosed.

Abstract: An operating range boundary for switching a cam for driving an intake valve (drive cam) is changed in a direction of decreasing an engine load if a target EGR rate is predicted to increase across the contour line of the EGR rate. By changing the boundary, the drive cam is switched from a large cam to a small cam before an operating point is transferred from a partitioned range with a low target EGR rate to a partitioned range with a high target EGR rate.

Abstract: Methods and systems are provided for coordinating operation of a high pressure EGR control loop with a boost pressure control loop. In one example, following a tip-in, turbine vane position may be adjusted as a function of a maximum permissible exhaust pressure upstream of a turbocharger turbine. The maximum permissible exhaust pressure may be determined as a function of a HP EGR valve position at the time of the tip-in.

Abstract: A first limit requesting process limits a dither control process of fuel injection valves in such a manner that the absolute value of the difference between the air-fuel ratios of the cylinders becomes smaller when the degree of variation of the injection amounts of the fuel injection valves provided for respective cylinders is great than when the degree of variation is small. A second limit requesting process limits the dither control process in such a manner that the absolute value is smaller when the torque fluctuation amount of the internal combustion engine is great than when the torque fluctuation amount is small. The limiting process limits the dither control process in accordance with one of requests generated by the first limit requesting process and the second limit requesting process that causes the absolute value to be smaller than the other.

Abstract: Systems and methods for operating an engine with a plurality of deactivating valves for deactivating engine cylinders are presented. In one example, a plurality of different cylinder operating modes may be available to operate the engine. Engine fuel consumption in each of the plurality of different cylinder operating modes is estimated and the engine may be operated in the cylinder mode that provides greatest fuel efficiency.

Abstract: In a method for controlling an engine, based on a control map of an engine speed N and a fuel injection amount Q of a common-rail fuel injection unit, a controller calculating the fuel injection amount Q depending on the engine speed N, calculating an injection amount deviation ?Qn as a fuel injection amount increase, and determining that an engine is in a transient state if the injection amount deviation ?Qn exceeds a reference transient injection amount deviation A2 or if a transient injection amount deviation count Xq is larger than or equal to a reference transient injection amount deviation count X2. If it is determined that the engine is in the transient state, the controller controls an EGR unit and a boost controller according to an excess air ratio ? that is an indicator indicating the state of the engine.

Abstract: Fuel injection control of an internal combustion engine requires an optimized fuel amount that can be burned completely with oxygen in intake air to be supplied, but the oxygen concentration in the atmospheric air is affected by humidity. By separately calculating a dry air flow rate that directly affects the oxygen amount and a humidity flow rate that is a change factor of the oxygen concentration in the intake air of the internal combustion engine, the fuel can be supplied to the cylinder of the internal combustion engine at an optimized air-fuel ratio. In addition, highly precise control involving EGR for flowback of a part of the exhaust gas flowing in the exhaust pipe to the intake pipe can also be achieved.

Abstract: An object of the invention is to provide a drive device of a fuel injection device which can increase the accuracy in an injected fuel injection amount by combining the fuel injections from a plurality of injection pulse widths. In the drive device of the fuel injection device which has a function of driving the fuel injection device such that the fuel injection is performed plural times in one combustion cycle, the fuel injection device is driven such that a fuel injection at a target opening level in which a valve element or a movable element of the fuel injection device reaches a regulation member and a fuel injection at an intermediate opening level in which the valve element does not reach the regulation member are included in the plural times of division injections performed in one combustion cycle.

Abstract: A control apparatus for an engine includes an engine, an EGR system, a spark plug, a controller, and a supercharging system. While a supercharging system is performing supercharging and the EGR system is introducing burned gas into a combustion chamber, in response to a control signal from the controller, the spark plug ignites air-fuel mixture at predetermined timing so that unburned air-fuel mixture combusts by autoignition after the air-fuel mixture starts to combust by the ignition.

Abstract: A control apparatus for a compression autoignition engine includes an engine, a spark plug, a controller, and sensors. After the spark plug ignites air-fuel mixture to start combustion, unburned air-fuel mixture is combusted by autoignition. The controller changes an SI rate in accordance with an operation state of the engine. Furthermore, the controller adjusts the SI rate when determining that the SI rate needs to be adjusted.

Abstract: A combustion control device for a compression autoignition engine includes an engine, a state quantity setting device, a spark plug, a controller, and a sensor. The spark plug receives a control signal from the controller and ignites air-fuel mixture at predetermined ignition timing such that the ignited air-fuel mixture is combusted by flame propagation and then unburned air-fuel mixture in a combustion chamber is combusted by autoignition. The controller outputs a control signal to an injector such that, in a compression stroke, fuel is injected at specific timing at which a line obtained by extending an axis of each hole of the injector overlaps with a specific portion including an opening edge of a cavity in an upper surface of a piston.

Abstract: A cylinder liner for an opposed-piston engine, and corresponding methods of extending engine durability and thermal management therewith, has opposite ends and a bore with a longitudinal axis for supporting reciprocating movement of a pair of opposed pistons. An intermediate portion of the liner extends between the opposite ends and includes an annular liner portion within which the pistons reach respective TC locations. A liner ring is seated in a portion of the bore in the annular liner portion, between the TC locations, for scraping carbon from top lands of the pistons and/or increasing the thermal resistance of the annular liner portion.

Abstract: Provided is a cylinder liner having a first portion with a first thermal conductivity and a second portion with a second thermal conductivity. The first portion having the first thermal conductivity can include as-cast projections or a coating of a material, as desired. The first thermal conductivity can be greater than the second thermal conductivity. In this manner, the cylinder liner can exhibit a thermal conductivity gradient.

Abstract: An engine with a rotating valve assembly is disclosed. The valve assembly including a housing having an internal cavity, an open top, and an open bottom, the open top and open bottom being in fluid communication with the internal cavity; a valve barrel positioned in the internal cavity and adapted for rotation therein, the valve barrel having an annular peripheral surface and an aperture extending transversely therethrough communicating with the peripheral surface on opposite sides; a first seal assembly positioned in the open top and a second seal assembly positioned in the open bottom, the first and second seal assemblies each include a seal having a sealing surface in mating engagement with the peripheral surface and an aperture extending therethrough.

Abstract: Exemplary embodiments are directed to a bell housing with an adjustable register plate for providing adjustable engine crankshaft-transmission alignment. The bell housing includes a body adapted for attachment to an engine block. The adjustable register plate includes a register bore for accommodating the transmission. The register plate can be secured to the bell housing by inserting register plate fasteners through register plate fastener holes into the corresponding register plate attachment holes of the bell housing. The alignment of the register plate relative to the bell housing, and thereby alignment of the transmission with the crankshaft, can be adjusted by loosening the fasteners and moving the register plate laterally, about the register plate fasteners, relative to the bell housing, and then tightening the fasteners to locate the register plate in the desired position.

Abstract: A gas turbine engine system according to an exemplary aspect of the present disclosure may include a fan nacelle that extends circumferentially about a fan, and at least one integrated mechanism coupled to the fan nacelle. The at least one integrated mechanism includes a variable fan nozzle and a thrust reverser, with the thrust reverser and the variable fan nozzle having a common part.