Abstract: A pumping system deployed in a wellbore has a motor, a pump driven by the motor, and a volumetric compensator connected to the motor to accommodate the expansion and contraction of fluids contained within the motor. The volumetric compensator has a head connected to the motor, a base that includes a fluid exchange port that extends to the wellbore, and a housing extending between the head and the base. The volumetric compensator further includes an inverted bellows assembly contained within the housing. The inverted bellows assembly includes a metal bellows that has an interior, an exterior, a proximal end and a distal end. The interior of the metal bellows is in fluid communication with the wellbore. The inverted bellows assembly may also include one or more guide rings connected to the exterior of the metal bellows. The guide rings are lubricated by the clean motor fluid surrounding the exterior of the metal bellows.

Abstract: A rotating turbomachine provided with a fluid sealing device, comprising an extensible/dilatable bellows piston to make a sealing surface abut against a rotor disc, or against the head of the shaft, therefore confining the working fluid in the turbomachine stopped during the respective maintenance operations, is described. A coolant is supplied inside the bellows piston during the normal operations of the machine.

Abstract: A vehicle comprising: an engine comprising two banks of cylinders having axial directions angled relative to each other to form a region running between the axial directions of the two banks; a plurality of exhaust components located in the region; and a heat shield enclosing the exhaust components between the engine and the heat shield, the heat shield comprising an inner surface facing the exhaust components, a first heat shield inlet and a heat shield outlet, and the heat shield being configured to channel an airflow between the first heat shield inlet and the heat shield outlet over the inner surface of the heat shield.

Abstract: The present disclosure relates to a compressor including a case, a compression unit provided inside the case, and a driving unit, wherein the compression unit includes a cylinder having a compression space, a piston reciprocating inside the cylinder, a discharge cover covering the compression space, a first plenum disposed inside the discharge cover and having a discharge space and a coupling space, a second plenum disposed inside the discharge cover and defining a movement channel through which refrigerant moves, a rib disposed in the movement channel, and a communicating portion through which the discharge space and the movement channel communicate with each other, wherein the refrigerant discharged from the compression space moves along the discharge space, the communicating portion, and the movement channel, whereby pulsation caused by the discharge of the refrigerant can be reduced.

Abstract: A valve train assembly for an internal combustion engine includes: a dual body rocker arm for controlling a valve of a cylinder, the rocker arm including a first body, a second body mounted for pivotal motion with respect to the first body, a first biasing means, and a latch pin moveable between a first position in which the latch pin latches the first body and the second body together and a second position in which the first body and the second body are un-latched to allow pivotal motion of the second body relative to the first body; and an actuator arrangement external to the dual body rocker arm and drivable by an actuation source, the actuator arrangement moving the latch pin from one of the first position and the second position to the other of the first position to the second position.

Abstract: Reducing engagement noise in a chain drive or belt drive for an internal combustion engine having a crankshaft having a driving sprocket and at least one shaft having a first driven sprocket and a second driven sprocket, where the driving sprocket and at least one of the first driven sprocket and the second driven sprocket contain a pattern of pitch radii such that the radial variation of the pitch radii excite tensions at non-prevalent orders in a drive system of the internal combustion engine. The non-prevalent engine cycle orders excited by each of the driving sprocket, the first driven sprocket and the second driven sprocket are different.

Abstract: A system for dispensing abrasive materials includes a transfer pump configured to pump abrasive material to a metering pump configured to pump the abrasive material to an application. Dynamic interfaces within the pumps are at least partially formed by sleeved components of the pump interfacing with a seal configured to engage with the sleeved surface during relative movement between the sleeved surface and the seal. The smooth exterior surfaces of the sleeves interface with the seals to prevent abrasive particulate in the material from adhering to the sleeve, preventing the abrasive particulate from being pulled between the sleeve and the seal.

Abstract: An improved air compressor is provided. The air compressor includes a cylinder block having a head deck that defines a piston bore for reciprocal movement of a piston therein. The head deck further includes first and second ramped surfaces that slope downward toward the peripheral edge of the piston bore. A valve plate is in direct contact with the upper surface of the head deck, the valve plate having a leaf valve. During an intake stroke of the piston, the leaf valve deflects downward into direct engagement with the first and second ramped surfaces. Because the air compressor lacks a lower gasket between the valve plate and the head deck, the cost and assembly time associated with the lower gasket are eliminated.

Abstract: A centrifugal compressor, including: a housing; a motor assembly disposed in the housing and a motor cavity and a motor shaft located in the motor cavity, the motor shaft having a first end and a second end extending from the motor cavity; a first impeller assembly located at the first end of the motor shaft and provided with a first labyrinth sealing mechanism; a second impeller assembly located at the second end of the motor shaft and provided with a second labyrinth sealing mechanism; a first gas bearing assembly provided between the motor cavity and the first impeller assembly; and a second gas bearing assembly provided between the motor cavity and the second impeller assembly; wherein the first labyrinth sealing mechanism is kept in gas communication with the first gas bearing assembly, and the second labyrinth sealing mechanism is kept in gas communication with the second gas bearing assembly.

Abstract: A mixer for a vehicle exhaust gas system, according to an exemplary aspect of the present disclosure includes, among other things, a mixer housing defining an internal cavity and a venturi section including integrally formed mixing vanes and positioned within the internal cavity. The venturi section comprises a first portion and a second portion that are combined to provide a mixing chamber therebetween. A doser mount opening is formed within the mixer housing that is open to the mixing chamber.

Abstract: A reciprocating pump includes a fluid end having a body defining a plunger bore that engages a plunger sleeve with a threaded interface, where the plunger sleeve defines throughbore configured to receive a plunger operatively reciprocating within the plunger bore during operation of the reciprocating pump. A packing assembly including a plurality of stacked annular seals is disposed between the plunger sleeve and the plunger. A packing nut having a threaded profile for engagement with a threaded surface of the plunger bore asserts a load against the packing assembly to ensure a positive engagement with the plunger.

Abstract: An exhaust treatment system for a work vehicle includes a mixing conduit extending between upstream and downstream ends along a bulk flow direction, where the upstream end receives engine exhaust. The system further includes an injector nozzle configured to inject exhaust reductant into the mixing conduit at a location between the upstream and downstream ends. Additionally, the system includes a branch conduit, where an inlet end of the branch conduit is fluidly coupled to the mixing conduit upstream of a location at which an outlet end of the branch conduit is fluidly coupled to the mixing conduit. A portion of the exhaust flowing through the mixing conduit may be directed through the branch conduit, where the outlet end of the branch conduit is configured to direct the portion of the exhaust back into the mixing conduit such that a spiraling flow of the exhaust is generated within the mixing conduit.

Abstract: There is provided a variable valve apparatus including: a plurality of rocker arms; a coupling pin disposed in a housing hole of the rocker arm closer to one side; a release pin disposed in a housing hole of the rocker arm closer to the other side; a pressing member; a transmission member; and a push-back member disposed so as to push back the transmission member from the other side. The pressing member is configured to push the coupling pin into the housing hole of the rocker arm closer to the other side to couple the plurality of rocker arms. The transmission member is configured to push back the coupling pin into the housing hole of the rocker arm closer to the one side to release a coupling of the plurality of rocker arms.

Abstract: A method monitors the state of a device having a first drive cylinder for receiving hydraulic fluid and a first drive piston which is movably arranged in the first drive cylinder. The method determines a speed of the first drive piston, establishes a difference between the determined speed of the first drive piston and an expected speed of the first drive piston, and determines a faulty state as a function of the difference established between the determined speed of the first drive piston and the expected speed of the first drive piston.

Abstract: A method for controlling a valve arrangement for an internal combustion engine, the valve arrangement including a piston arrangement comprising a piston having a piston end portion facing an inlet valve of the valve arrangement. The method includes receiving a signal indicative of a temperature level of an exhaust gas after treatment system and when the signal indicates a temperature level below a predetermined threshold level: advancing an exhaust event of the internal combustion engine; and controlling the piston arrangement for reducing the distance between the piston end portion and the inlet valve before the internal combustion engine assumes an air intake event.

Abstract: A turbomachine includes a housing with an e-machine housing. Also, the turbomachine includes a rotating group supported for rotation within the housing. Moreover, the turbomachine includes an e-machine that is configured as at least one of an electric motor and an electric generator, that is operatively coupled to the rotating group, and that includes a stator that is housed within the e-machine housing. Furthermore, the turbomachine includes a thermal bridge member that extends between the stator and the e-machine housing to define a thermal path for heat to transfer from the stator to the e-machine housing. The e-machine housing includes a thermal bridge retainer member that defines an outer boundary of the thermal bridge member.

Abstract: Systems and methods for producing hydrocarbons from a subterranean well include an electrical submersible pump assembly with a motor, where the motor has a stator located within a motor housing. The stator has a stator body with an interior cavity. A rotor assembly is located within the interior cavity of the stator. The rotor assembly includes a rotor shaft, a rotor member, and an intermediate rotor bearing assembly. A liner is located along an interior surface of the interior cavity, the liner being a thin walled member that is secured to the motor housing and seals the stator body from a wellbore fluid. A rotor cavity is located within an inner bore of the liner. A membrane is located within the liner, the membrane formed of a material operable to bind a component of the wellbore fluid. A hydrophobic fluid is circulating within the rotor cavity.

Abstract: Systems and related methods include a rocker arm having integrated components, including a lost motion actuator piston and components for resetting the lost motion actuator piston to provide normal valve closing or late valve closing. Selective reset is facilitated by a reset piston and a blocking piston disposed in a hydraulic circuit including a reset passage. In a non-resetting mode of operation, the blocking piston may block oil flow within the reset passage, regardless of the position of the reset piston, which facilitates late valve closing. An alternative embodiment includes a blocking sleeve disposed concentrically relative to the reset piston.

Abstract: A self-contained actuating magnetic pump (SCAMP) having an inlet valve and discharge valve, a piston, a compression cavity, an electromagnetic coil, a frame, and an armature to drive the piston. In one embodiment, the electromatic coils are isolated from the working fluid. In one embodiment, the SCAMP includes a housing that allows for thermal transfer from the electromagnetic coil to the working fluid. In one embodiment, the SCAMP includes a control unit that enables operation of the SCAMP in a power mode, a coast mode, and a retraction mode.

Abstract: An apparatus is provided to test valves. The apparatus includes a support structure and a plurality of engagement members coupled to the support structure. Each member of the plurality of engagement members is coupled with a valve of a valve train associated with an engine head. The apparatus further includes a camshaft, which includes a plurality of lobes coupled to the support structure. Each lobe of the plurality of lobes are equally spaced from each other and coupled to a member of the plurality of engagement members. The apparatus further includes a driving mechanism coupled to the camshaft, which is configured to rotate the camshaft and control each member of the plurality of engagement members to further control an activation of each valve of the valve train associated with the engine head.