Abstract: A method of controlling an engine system equipped with a supercharger may include determining a target value of boost pressure, depending on an rpm of an engine and then determining whether the supercharger is in an operable region, deducing a target rpm of the supercharger, based on a reference value previously input into the controller and a current state value of a vehicle input into the controller, when it has been determined in the operating-region determination that the supercharger is in the operable region, setting a maximum value, in the target rpm deduced in the target-rpm deduction, to a drive rpm of the supercharger, and verifying whether the set drive rpm is greater than or equal to a predetermined reference value previously input into the controller, and driving the supercharger at the set drive rpm, by closing the bypass valve to open the supercharger path.

Abstract: A multi-stage electric centrifugal compressor and a supercharging system for an internal combustion engine with a driving unit of a rotational shaft that can be readily controlled when a single-shaft and two-stage centrifugal compressor is employed is provided. A multi-stage electric centrifugal compressor includes: an electric motor; and a pair of centrifugal compressors coupled to either side of the electric motor, the pair of centrifugal compressors comprising a low-pressure stage compressor and a high-pressure stage compressor connected in series. The low-pressure stage compressor and the high-pressure stage compressor are formed to have different pressure ratios from each other.

Abstract: A vehicle incorporates a turbocharged internal combustion engine and a crankcase ventilation system. That crankcase ventilation system includes a first vent line connecting a cam cover at a first spigot to an air inlet duct at a second spigot. In addition the system includes a second vent line connected between the crankcase and the intake manifold of the engine. A one-way valve is provided in the second vent line. A restriction is integrated into either the first spigot, the second spigot or a quick connect that connects the first vent line to the first or second spigot.

Abstract: A thermoregulation system including an exhaust-gas outlet for discharging exhaust gas from the engine, an engine gas inlet, an exhaust-gas recirculation circuit between the exhaust-gas outlet and the engine gas inlet for recirculating at least part of the exhaust gases, a circuit for conducting and/or circulating the coolant in order to cool the engine, whereby the coolant-conducting circuit includes a latent-heat storage unit which receives heat from or transfers heat to the coolant. A first heat exchanger is arranged in the exhaust-gas recycling circuit to exchange heat between the exhaust gas and the coolant. At least one valve and at least one branch control the flow for controlling the heat exchange in the first heat exchanger. An oil-feed circuit is provided for heating or cooling the oil and includes a second heat exchanger exchanging heat between the oil and the coolant flowing from the first heat exchanger.

Abstract: A method includes deactivating one or more cylinders of the second cylinder group responsive to engine operation in a first engine speed-load region, and adjusting exhaust valve timing of one or more cylinders of the first cylinder group responsive to the deactivating. The method further includes adjusting exhaust valve timing of the one or more cylinders of the first cylinder group responsive to engine operation in a second engine speed-load region, and deactivating the one or more cylinders of the second cylinder group responsive to the adjusting.

Abstract: A turbocharger system is provided having a compressor wheel and a turbine wheel connected by a shaft; a conduit configured to deliver a flow of lubricant to a bearing which supports the shaft, the conduit being provided with a valve; a sensor configured to monitor a speed of rotation of the shaft; and a controller configured to operate the valve to substantially stop the flow of lubricant to the bearing in response to detection of deceleration of the shaft and the speed of the shaft dropping below a threshold.

Abstract: A control apparatus for an internal combustion engine is configured to: open a waste gate valve if switching operation modes from supercharged lean burn operation to stoichiometric burn operation and if it is necessary to decrease an air amount; control an exhaust variable valve train so that, during a response delay period accompanying the waste gate valve being opened, a first valve opening period EX1 and a second valve opening period EX2 are set and the second valve opening period overlaps with a valve opening period IN; control a fuel injection valve so as to inject fuel of an amount necessary to realize the stoichiometric air-fuel ratio under a stoichiometric requested air amount during the response delay period; and control the second valve opening period EX2 of the exhaust valve so that, during the response delay period, the air amount comes close to the requested air amount.

Abstract: An internal combustion engine system includes an internal combustion engine, an exhaust system, an exhaust gas recirculation circuit and a turbocharger including a first turbine interacting with a first compressor for charging air to the internal combustion engine. An exhaust gas recirculation passage is arranged to divert exhaust gases from the internal combustion engine upstream the first turbine and to debouch the exhaust gases downstream the first compressor. The internal combustion engine includes a bleed air channel which is located to divert compressed air at a location in or down¬stream from the first compressor and upstream of the internal combustion engine. A second turbine is arranged for receiving bleed air from the bleed air channel to recover energy from the bleed air channel. A vehicle including such an internal combustion engine system is also provided.

Abstract: A variable flow-restricting turbine assembly for a turbocharger includes a housing, a turbine mounted for rotation in the housing, and a variable flow-restrictor. The variable flow-restrictor includes a first series of angularly-distributed flow-restrictor portions distributed around the turbine wheel and located in an exhaust flow path to the wheel, and a second series of angularly-distributed flow-restrictor portions distributed around the first series and located in the exhaust path. At least one of the first and second series is rotatable in the housing to vary the relative angular positions of the first and second series. The restrictor portions are arranged such that the first portions align with the second portions at each of a plurality of relative angular positions to open flow channels between the portions and such that they misalign between those positions to close the flow channels.

Abstract: Methods and systems are provided for an Exhaust Gas Recirculation (EGR) system for an internal combustion engine. In one example, the EGR system comprises an inlet air duct configured to provide the internal combustion engine with inlet air, an EGR diffuser configured to provide recirculated exhaust gases from the internal combustion engine to the inlet air duct through an outlet, and a resilient element, the EGR diffuser and resilient element adapted to provide homogenous mixing of EGR gases and inlet air at a specific operating condition of the vehicle.

Abstract: A control apparatus for an internal combustion engine is configured, when regenerative processing by an electric supercharger is executed, to control the opening degree of a throttle valve, the opening degree of an intake bypass valve and the power generation load on a motor generator to set the opening degree of the intake bypass valve and the power regeneration load so that a second intake pressure which is an intake pressure downstream of an electric compressor and upstream of a turbo compressor does not fall below a second specific pressure value, based on a request intake air flow rate of the internal combustion engine and the second intake pressure.

Abstract: A method and apparatus are disclosed for operating an internal combustion engine equipped with a turbocharger and an exhaust gas recirculation pipe fluidly connecting an exhaust gas line to an air intake duct upstream of a compressor of the turbocharger. A value of a parameter indicative of a temperature of a portion of the exhaust gas recirculation pipe is determined. Exhaust gas recirculation via the exhaust gas recirculation pipe is prevented when the determined value is lower than a predetermined threshold value thereof. The air intake duct portion of compressed air exiting from the compressor is recirculated via the portion of the exhaust gas recirculation pipe.

Abstract: An apparatus for retrieving exhaust heat of an engine, may include the engine including a plurality of combustion chambers, an intake line, an exhaust line, a turbocharger including, a turbine provided on the exhaust line, and a compressor provided on the intake line and compressing external air, an exhaust gas recirculation (EGR) apparatus including an EGR line branched from the exhaust line at a rear end of the turbocharger and merged with the intake line, an EGR cooler disposed on the EGR line, and an EGR valve to adjust an amount of re-circulated exhaust gas, an intercooler to cool the intake gas introduced through the intake line, an intercooler cooling line passing through a radiator and the intercooler, an EGR cooling line passing through the radiator and the EGR cooler, an EGR exhaust line, and an exhaust adjusting valve disposed on the EGR exhaust line.

Abstract: Systems, apparatus, and methods are disclosed that include a divided exhaust engine configured to control an EGR fraction in the charge flow to the cylinders in response to an EGR fraction overshoot condition, an exhaust pressure change in the EGR loop, and/or a transient operating condition.

Abstract: A supercharged internal combustion engine includes at least two exhaust-gas turbochargers arranged in series, wherein a first exhaust-gas turbocharger serves as a low-pressure stage and a second exhaust-gas turbocharger serves as a high-pressure stage. A second turbine of the second exhaust-gas turbocharger may be present upstream of a first turbine of the first exhaust-gas turbocharger, and a second compressor of the second exhaust-gas turbocharger may be arranged in an intake system downstream of a first compressor of the first exhaust-gas turbocharger and a first bypass line may branch off upstream of the second turbine and join back at a junction point between the first turbine and the second turbine.

Abstract: A GDCI engine control system provides rapid heating of intake air to the combustion chamber when the engine is cold. The engine uses an intake air pathway that includes a compressor having a compressor inlet and a compressor outlet. A loop fluidly connects the compressor outlet to the compressor inlet. First and second valves are arranged in the loop and are arranged near the compressor outlet and the compressor inlet respectively. First and second passages converge at a first junction, and the first passage fluidly connects the first valve and the first junction. The second passage fluidly connects to the loop at a second junction arranged fluidly between the first and second valves. An intake air heat exchanger is arranged in the first passage and fluidly between the first valve and the first junction.

Abstract: A product may include a bearing housing in which a shaft may be supported by a bearing so that it may rotate. A compressor wheel may be disposed on the shaft. A compressor cover may be connected with the bearing housing, which may form a compressor body and may define a chamber within which the compressor wheel may rotate. A diffuser may extend radially outward from the chamber and may receive gas from the compressor wheel. An inlet may be provided to the compressor body, which may receive a supply of exhaust gas. An EGR distribution cavity may be defined within the compressor body and may extend around the shaft. An EGR inlet channel may extend into the bearing housing from the inlet to the EGR distribution cavity. An EGR passage may extend from the EGR distribution cavity to the diffuser.

Abstract: An assembly for an exhaust bypass valve of a two-stage turbocharger can include a first turbocharger stage; a second turbocharger stage; an exhaust bypass valve that includes an open state and a closed state; and a linkage mechanism that links the exhaust bypass valve to an actuator where the linkage mechanism includes a locked state for the closed state of the exhaust bypass valve.

Abstract: A gas turbine health monitoring fuel system including a fuel splitter, a first and second fuel nozzle, a first and second fuel pump, and a common drive coupled to the first and second fuel pumps. The first and second fuel pumps are downstream from the fuel splitter. The first fuel nozzle is fluidly coupled to the first fuel pump by a first fuel stream. The second fuel nozzle is fluidly coupled to the second fuel pump by a second fuel stream. The common drive is configured to drive the first and second fuel pumps at a same speed. The controller system is configured to determine a first fuel pressure in the first fuel stream, determine a second fuel pressure in the second fuel stream, and identify a difference between the first and second fuel pressures.

Abstract: A device and a method of temporarily increasing power of at least a first turbine engine is disclosed. The device includes a coolant liquid tank and a first injection circuit connected to the tank and leading to at least one injection nozzle suitable for being installed upstream from at least one compressor stage of the first turbine engine. This first injection circuit includes at least a first flow valve configured to open when a pressure exceeds a predetermined threshold compared with a downstream pressure from at least one compressor stage of a second turbine engine so as to enable the coolant liquid to flow towards the injection nozzle of the first injection circuit.