Abstract: A method for controlling an exhaust-gas aftertreatment system of an internal combustion engine having at least two SCR catalytic converters connected in series. The exhaust-gas aftertreatment system has a bypass including a bypass valve around the first SCR catalytic converter, and exhaust gases of the internal combustion engine are routed around the first SCR catalytic converter via the bypass. The method includes: ascertaining an activation of an exhaust brake operation; ascertaining a first actual temperature for the first SCR catalytic converter; ascertaining an actual NH3 storage level for the first SCR catalytic converter; ascertaining a modeled, maximally permitted NH3 storage level as a function of the actual NH3 storage level; ascertaining a future temperature for the first SCR catalytic converter; ascertaining a comparison as a function of the ascertained first actual and future temperatures; actuating the bypass valve as a function of the ascertained comparison, opening the bypass valve.

Abstract: A screw compressor (100), comprising a screw rotor (110) and a spool valve (120). The screw rotor (110) comprises a suction head end (111) and an exhaust tail end (112). Gas is sucked in from the suction head end (111) and compressed gas is discharged from the exhaust tail end (112). The spool valve (120) comprises a working side (125) for sealing a compression chamber of the screw rotor (110). The working side (125) comprises a spool valve head end (121) and a spool valve tail end (122) and can do a reciprocating motion along the axis direction of the screw rotor (110). When the spool valve (120) moves to a suction capacity adjusting position (240), the spool valve head end (121) is located at the inner side of the suction head end (111) of the screw rotor (110), and a suction capacity adjusting distance (D2) is formed between the spool valve head end (121) and the suction head end (111) so that the suction capacity of the screw compressor is adjusted.

Abstract: A processing method for a camshaft sensor including a toothed wheel, rotationally integral with a camshaft, rotating in front of a fixed sensing element capable of transmitting a signal indicating the profile of the toothed wheel, the method including the following steps: receiving a tooth edge, identifying the corresponding index, performing at least one first processing operation using each index, further including the following steps: qualifying an index and performing at least one second processing operation using the index, if it is qualified.

Abstract: A vacuum pump and a washer which can reduce vibration of a rotor and the rotor which can reduce the vibration are provided. When an inertia moment ratio which is a ratio between the inertia moment around a z-axis and the inertia moment around an x-axis or a y-axis is larger than 1, a natural frequency ?2 does not match a rotational frequency ?z but goes away from that. When the natural frequency ?2 matches the rotational frequency ?z, the rotor vibrates and thus, a fatigue failure occurs in a rotor blade. When the rotor is to be made larger in a radial direction of a rotating shaft, a value of the inertia moment ratio is set to a value larger than 1.

Abstract: In some implementations, a controller may cause first adjustment of at least one component of a variable geometry turbocharger (VGT) of the machine. The controller may cause, based on causing the first adjustment of the at least one component of the VGT, second adjustment of the at least one component of the VGT. The controller may determine, based on causing the second adjustment of the at least one component of the VGT, an amount of time for a speed of the VGT to decrease to less than or equal to speed threshold. The controller may determine, based on the amount of time, VGT assessment information. The controller may determine, based on the VGT assessment information, one or more actions to be performed.

Abstract: In order to improve a machine for depressurizing or compressing substantially gaseous media, comprising a machine casing and at least one screw rotor, which is arranged in a screw rotor bore in the machine casing, extends between a low-pressure side and a high-pressure side of the screw rotor bore, cooperates with the substantially gaseous medium and is mounted on both sides in the machine casing by means of a respective bearing set, and a motor/generator unit that is coupled or couplable to the at least one screw rotor, it is proposed that the at least one screw rotor should be provided with at least one axial support bearing that axially supports the at least one screw rotor such that a high-pressure end face of the at least one screw rotor is guided, without making contact, to an end wall, which faces this end face, of the machine casing that receives the at least one screw rotor.

Abstract: A turbine engine stage includes a plurality of airfoils extending between an inner band and an outer band. Each airfoil in the plurality of airfoils can have an outer wall defining a pressure side and a suction side, with the outer wall extending between a leading edge and a trailing edge. An intervening flow passage is defined between two adjacent airfoils in the plurality of airfoils.

Abstract: A method of modifying a rotor blade is provided for a rotor blade including a spar having an inboard portion with a substantially constant overall height, the inboard portion further including a top layer having a substantially constant first thickness and a bottom layer having a substantially constant second thickness. The method includes removing a root portion of the inboard portion to thereby modify the rotor blade and installing a cuff configured to couple to the rotor blade to an aircraft.

Abstract: A turbocharger system for diesel trucks includes a compressor in gaseous communication with an engine; a turbine in gaseous communication with the engine via an exhaust manifold; the compressor intakes and compresses air to be pushed to the engine; an air compressor with one or more air tanks, the air compressor to pressurize and store air; one or more pipes connecting the air compressor to the exhaust manifold; a solenoid valve to open and close the one or more pipes between the air compressor and the exhaust manifold; and a control system to operate the solenoid valve; a command from the control system to the solenoid valve opens the solenoid valve to push air from the air compressor to the exhaust manifold to expand and speed up a turbo of the engine.

Abstract: A system includes an aftertreatment system heater of an exhaust aftertreatment system coupled to an engine A controller coupled to the aftertreatment system heater is configured to determine a condition of an exhaust gas from an engine and compare the condition to a predefined threshold. If the condition of the exhaust gas does not meet the predefined threshold, the controller is configured to determine whether an engine operating condition is met for activating a cylinder deactivation operating mode for the engine. If the engine operating condition is met, the controller is configured to operate the engine in the cylinder deactivation operating mode by deactivating a cylinder of a plurality of cylinders. If the engine operating condition is not met, the controller is configured to activate the aftertreatment system heater to heat the exhaust gas.

Abstract: A first output limit value is determined as an intersection point of a knock-limit output line which is set according to an exhaust gas recirculation rate and ignition timing and an exhaust-temperature-limit output line which is set according to the exhaust gas recirculation rate and ignition timing; a second output limit value is determined as an intersection point of the knock-limit output line and an air-quantity-limit output line which is set according to the exhaust gas recirculation rate, ignition timing and atmospheric pressure; and a third output limit value is determined as an intersection point of the knock-limit output line and a thermal-management-limit output line which is set according to the exhaust gas recirculation rate, ignition timing and vehicle running speed. A value of the exhaust gas recirculation rate at which the condition “P1?P2 or P1?P3” is satisfied is set as a target exhaust gas recirculation rate.

Abstract: To eliminate accumulation of air while preventing a decrease in pump efficiency, a pump is provided. The pump includes a rotary shaft, an impeller that is attached to the rotary shaft and that rotates with rotation of the rotary shaft, a casing that surrounds the rotary shaft, a shaft sealing device that seals a gap between the casing and the rotary shaft, and a baffle plate part that is located between the impeller and the shaft sealing device and attached to a rotating body. The baffle plate part extends in a direction that is inclined or orthogonal with respect to a surface orthogonal to an axial direction of the rotary shaft.

Abstract: A method for manufacturing a position indicator sensor wheel for a camshaft is disclosed. The position indicator includes an axially extending passage for connecting to the camshaft and at least one radially projecting tooth. The method includes providing a sheet from a sheet material; introducing the passage into the sheet; and roughening a radial inner surface of the passage in at least one rough portion.

Abstract: A water pump having a coolant flow path includes a stator disposed in a housing, a rotor surrounded by the stator, a shaft disposed in a flow path of the rotor, a first blade connected to the shaft, a first pipe spaced apart from an inner wall of the rotor defining the flow path to define a coolant inlet, a second pipe spaced apart from the inner wall to define a coolant outlet, and a second blade connected to the shaft and disposed in the first pipe or the second pipe.

Abstract: Various embodiments of the teachings herein include a method for heating a catalytic converter arranged in an exhaust-gas tract of an internal combustion engine and comprising an electric heating device. An example method may include: activating the electric heating device with a specified heating power at a time before the internal combustion engine is started; monitoring the catalyst temperature in a region of the catalytic converter adjacent the heating device; before the catalyst temperature has reached a predetermined first threshold value, supplying a secondary air mass flow with a first flow rate is supplied into the exhaust-gas tract upstream of the catalytic converter; and after the catalyst temperature has reached the predetermined first threshold value, increasing the secondary air mass flow to a second flow rate greater than the first flow rate.

Abstract: An engine device includes an exhaust gas purification device above a cylinder head through a support pedestal. The support pedestal has a flat portion on which the exhaust gas purification device is mounted, and a plurality of legs which protrude downward form the flat portion and are fixed to the cylinder head. The flat portion and the leg portion are formed integrally. Portions between the legs are each formed in an arch-shape.

Abstract: A system includes a catalyst for receiving and treating exhaust gas generated by an engine, a passive NOx adsorber (PNA) positioned upstream of the catalyst, a bypass valve positioned upstream of the catalyst and the PNA, and a controller. The controller is configured to, determine that the catalyst is operating under cold start conditions, control the bypass valve to direct exhaust gas to the PNA, determine that the catalyst is no longer operating under cold start conditions and continue to control the bypass valve to direct exhaust gas to the PNA for a predetermined duration, and after the elapse of the predetermined duration, control the bypass valve to direct exhaust gas to the catalyst bypassing the PNA. The controller is also configured to detect a high transient torque demand while the exhaust gas is provided to the PNA, and split the torque demand between the engine and an electric motor.

Abstract: A controller for an internal combustion engine is configured to execute a determination process and an anomaly diagnosing process. The determination process is a process of determining that a deviation between a first change amount and a second change amount during a fuel cutoff operation is less than or equal to a threshold. The anomaly diagnosing process is a process of determining that an exhaust purification device is in a detached state when it is determined in the determination process that the deviation is less than or equal to the threshold. The first change amount and the second change amount are change amounts per unit time of the temperature of exhaust gas on the upstream side and the downstream side of the exhaust purification device, respectively.

Abstract: A scroll device has a fixed scroll, and orbiting scroll, and at least an integrated cooling loop configured to receive coolant to cool the fixed scroll and the orbiting scroll. A flexible conduit is provided that curves radially around an orbital axis of the orbiting scroll to transfer coolant along integrated cooling loop. The integrated cooling loop separates coolant used to cool the fixed scroll and the orbiting scroll from the involutes of the scroll device providing clean operation of the scroll device. The integrated cooling loop may be defined by the flexible conduit, one or more cooling chambers, and/or one or more cooling passageways.

Abstract: An impeller includes a central shaft or a tube for mounting on a shaft; around the shaft or tube a hollow hub, which in the direction from one end to the other end increases in diameter. The hub possesses an outside and an inside oriented towards the shaft or tube; a back wall which is provided at the end of the hub with the largest diameter perpendicular to the shaft or tube which at least partially closes the hollow space of the hub; a series of blades that are attached to the outside of the hub by their base; wherein a number of flat, straight reinforcing ribs are provided which extend on the shaft or tube in an essentially radial direction and form a radial connection between the shaft or tube and the inside of the hub.