Abstract: An internal combustion engine includes a supercharger having a compressor and a turbine and an EGR apparatus having an exhaust recirculating pipe, an upstream EGR valve and a downstream EGR valve. An electronic control unit fully opens the upstream EGR valve and controls an EGR amount by the downstream EGR valve when a peak value of an exhaust pressure increases excessively. The resulting increase in exhaust volume causes the peak value of the exhaust pressure to fall, and damage to parts of an exhaust system can be avoided. The electronic control unit fully opens the downstream EGR valve and controls the EGR amount by the upstream EGR valve when the peak value of the exhaust pressure decreases excessively. The resulting decrease in the exhaust volume causes the peak value of the exhaust pressure to rise, enabling supercharging.

Abstract: In a system for controlling an internal combustion engine, first opening determination of determining whether to open an air bypass valve 22 on the basis of a compressor flow rate (target compressor flow rate QAIRCMD) passing through a compressor 17 and a compressor front-rear pressure ratio P2/P1, and second opening determination of determining whether to open the air bypass valve 22 on the basis of an opening ratio reduction amount DRTHO as a reduction amount of an opening ratio RTHO of a throttle valve 13 are performed. The air bypass valve 22 is opened when it is determined in both of the first opening determination and the second opening determination that the air bypass valve 22 should be opened.

Abstract: The present invention relates to an exhaust gas sensor arrangement structure comprising: an exhaust pipe 6 extending from an engine 3 to form a part of an exhaust flow path; an exhaust valve 7 that adjusts an aperture of the exhaust flow path; and a first exhaust gas sensor 8a that detects a predetermined component in an exhaust gas flowing through the exhaust flow path. The first exhaust gas sensor has a detector 80 arranged to protrude into the exhaust flow path. The exhaust valve includes a plate-like valve body 70 that expands and reduces a flow path cross section of the exhaust flow path, and a rotating shaft 71 extending in a direction intersecting with an axial direction of the exhaust flow path and serving as a rotation center of the valve body. A downstream end of the valve body approaches the detector as the valve body is rotated in a direction of reducing the flow path cross section.

Abstract: Various embodiments may include a method for operating an internal combustion engine having a wastegate turbocharger comprising: measuring an intake pipe pressure; determining a cylinder air mass from the pressure; injecting an amount of fuel into a cylinder of the internal combustion engine based on the air mass; determining and a plausible intake pipe pressure gradient for a current engine operating point; calculating a gradient of the measured intake pipe pressure during a full-load acceleration; comparing the stored plausible intake pipe pressure gradient to the calculated gradient; identifying manipulation of the intake pipe pressure sensor if the difference between the stored plausible intake pipe pressure gradient and the calculated gradient exceeds a selected threshold value; and limiting a power output of the engine if manipulation is identified.

Abstract: An internal combustion engine controller is applied to an internal combustion engine incorporating a turbocharger. The engine includes an intake passage, a compressor arranged in the intake passage, a bypass passage connecting portions of the intake passage at upstream and downstream sides of the compressor. An air bypass valve adjusts a flowrate of intake air passing through the bypass passage. The internal combustion engine controller includes an acceleration determination unit and an ABV control unit. The acceleration determination unit is configured to detect an acceleration request sent to the internal combustion engine and determine whether or not the acceleration request is in an initial stage. The ABV control unit is configured to execute a temporary open/close control to open the air bypass valve for a specified period when determined by the acceleration determination unit that the acceleration request is in the initial stage.

Abstract: An internal combustion engine includes a throttle valve, an EGR passage, an EGR valve, a valve mechanism that adjusts opening and closing characteristics of an intake valve or an exhaust valve of the internal combustion engine, and a controller that controls the throttle valve, the EGR valve and the valve mechanism, based on request torque that is requested of the internal combustion engine. The controller is configured to execute evacuation traveling control that operates the throttle valve to fully open, calculates a target intake air flow amount for achieving the request torque based on an effective opening area of the EGR valve which is stuck, and operates the valve mechanism in accordance with the target intake air flow amount, in at least one time period while the request torque is reducing when the EGR valve is stuck in an open state.

Abstract: A fan case for use in a gas turbine engine of an aircraft includes an outer shroud and a liner extending along the outer shroud. The fan case provides a protective band that blocks fan blades from being thrown out of the fan case in case of a blade-off event in which a fan blade is released during operation of the gas turbine engine.

Abstract: An exhaust system for a work vehicle includes a mixer that includes a nozzle configured to receive a first exhaust flow along a lateral axis through a plurality of openings in a peripheral wall of the nozzle. The nozzle also receives a diesel exhaust fluid along a longitudinal axis through a longitudinal inlet. Further, the nozzle is configured to mix the first exhaust flow and the diesel exhaust fluid to form an exhaust solution. In addition, the mixer includes a conduit configured to receive the exhaust solution along the longitudinal axis. Moreover, the conduit has an opening configured to receive a portion of the nozzle, and the conduit is configured to receive a second exhaust flow through a gap formed between the nozzle and the conduit at the opening, and the opening is positioned downstream of the plurality of openings.

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 system for feeding air to an engine of a vehicle includes a heat exchanger arranged along a duct for feeding air, downstream of a supercharging compressor, to cool a flow of air fed by the air compressor, by a fluid that circulates in an engine cooling circuit. The system also includes an evaporator, interposed in the duct downstream of the heat exchanger, to further cool the air flow by a coolant that circulates in an air conditioning circuit of the vehicle. The air conditioning circuit includes a coolant compressor and a controller for controlling activation of the coolant compressor, depending on a request for air conditioning of a passenger compartment of the vehicle, and a request for cooling the air fed to the engine. The electronic controller is configured to enable the coolant compressor to be activated only when the engine load is below a certain threshold.

Abstract: A method of controlling activation of light off time of a catalyst which controls exhaust emission from an engine of a vehicle may include determining whether the vehicle is in a cold start condition; determining a deterioration level of the catalyst by use of a temperature sensor; and retarding a spark timing according to the deterioration level of the catalyst and increasing a temperature of exhaust gas.

Abstract: An electric supercharger includes an electric motor, a compressor wheel rotated by the electric motor, and a compressor housing. The compressor housing includes a first passage through which air is introduced, an introducing port connecting to an EGR device, a second passage through which at least one of air and EGR gas is flowed, a bypass passage through which at least one of air and EGR gas is flowed, and a bypass valve to open and close the bypass passage. When the bypass valve is opened, air introduced from the first passage and EGR gas introduced from the introducing port are flowed through the bypass passage to the internal combustion engine. When the bypass valve is closed, air introduced from the first passage and EGR gas introduced from the introducing port are compressed in the compressor wheel and flowed through the second passage to the internal combustion engine.

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: Systems, methods and apparatus for connection of a multi-stage turbocharger to a heat exchanger are disclosed. The multi-stage turbocharger includes at least first and second compressors with respective first and second outlets. An air intake system is provided that connects each of the first and second compressor outlets to a common inlet of a heat exchanger. The air intake system includes a flow transition segment connected to the first and second compressor outlets, a diffuser segment, and a flow delivery segment connected to the inlet of the heat exchanger.

Abstract: Methods and systems are provided for a boosted internal combustion engine. In one example, a system may include an intake system for supplying charge air, a compressor arranged in the intake system, a first shut-off element arranged in the intake system upstream of an impeller of the compressor, a bypass line that branches off from the intake system upstream of the first shut-off element and that rejoins the intake system upstream of the impeller, a second shut-off element arranged in the bypass line, a compressed air line that opens into the bypass line downstream of the second shut-off element, and a third shut-off element arranged in the compressed air line. A map width of the compressor may be increased by providing airflow to the impeller via the bypass line during low mass flow conditions, and impeller acceleration may be expedited by providing compressed air via the compressed air line.

Abstract: A turbine supercharger includes: a turbine; a turbine housing which houses the turbine; and a turbine bypass valve for controlling a flow rate of exhaust gas to be supplied to the turbine. The turbine housing includes, inside the turbine housing: a scroll flow passage for guiding the exhaust gas to the turbine; an outlet flow passage for discharging the exhaust gas supplied to the turbine to outside of the turbine housing; and a bypass flow passage bypassing the turbine and connecting the scroll flow passage and the outlet flow passage. The turbine bypass valve includes: a valve rod; a valve body having a flat plate shape and being configured to revolve about the valve rod; and a valve housing having a cylindrical shape and defining a part of the bypass flow passage inside the valve housing. The valve housing is fixed to an inner peripheral wall surface of the bypass flow passage, inside the turbine housing.

Abstract: A engine system is provided with: a plurality of cylinder groups which burn a gas mixture and discharge an exhaust gas; a plurality of high-pressure stage superchargers each having high-pressure stage turbines driven by the exhaust gas from the corresponding cylinder group and high-pressure stage compressors rotated by driving of the high-pressure stage turbines and configured to compress a gas supplied to the corresponding cylinder group; and a plurality of low-pressure stage superchargers having a low-pressure stage turbine driven by an exhaust gas discharged from the high-pressure stage turbine of the high-pressure supercharger which is any one of the plurality of high-pressure stage superchargers, and a low-pressure stage compressor rotated by driving of the low-pressure stage turbine and configured to compress a gas supplied to the high-pressure stage compressor of the high-pressure stage supercharger other than the one high-pressure stage supercharger.

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 engine system includes an engine including a plurality of engine cylinders, an intake manifold, and an exhaust manifold; and a compound turbocharger system having a first turbine driving a first compressor, and a second turbine driving a second compressor. The engine system further includes an intake line including the first compressor, the second compressor, and the at least one intake manifold; and an exhaust line including the exhaust manifold, the second turbine, and the first turbine. The engine system also includes an exhaust restriction valve located in the exhaust manifold of the engine downstream of a subset of the plurality of the engine cylinders; and an exhaust gas recirculation line having an upstream end located to receive exhaust from the subset of the plurality of engine cylinders, and a downstream end coupled to the intake line downstream the first compressor and upstream of the second compressor.

Abstract: An operating range boundary for switching a cam for driving an intake valve (drive cam) is changed in a direction of increasing an engine load if a target EGR rate is predicted to increase across the contour line of the EGR rate during an acceleration operation. By changing to such a high load direction, a range in which a large cam is selected is enlarged. That is, switching of the drive cam from the large cam to a small cam is delayed.