Abstract: A controller for an internal combustion engine, the internal combustion engine including a fuel injection valve configured to supply fuel into a cylinder. The controller includes an electronic control unit configured to acquire an actual heat generation rate at time of combustion; and correct at least one of fuel injection pressure or amount of fuel injected when deviation amount between reference heat generation rate gradient and actual heat generation rate gradient is equal to or greater than predetermined value such that the deviation decreases. The reference heat generation rate gradient is a gradient of a predetermined reference heat generation rate at which a predetermined time elapses after a heat generation rate begins to rise. The actual heat generation rate gradient being a gradient of an actual heat generation rate acquired by the electronic control unit at which the predetermined time elapses after the heat generation rate begins to rise.

Abstract: A fuel injection control unit (engine controller 100) performs a main injection (72) over a period ranging from a last stage of a compression stroke to an initial stage of an expansion stroke, and also performs a preceding injection (71), injecting a smaller amount of a fuel than the main injection, over a period ranging from an intake stroke to a first half of the compression stroke, and also determines whether or not the fuel injected by the preceding injection causes a partial oxidation reaction during a second half of the compression stroke, and on determining that the fuel causes the partial oxidation reaction, performs a middle-stage injection (73). The middle-stage injection is performed at such a timing that allows the fuel injected by the middle-stage injection to ignite spontaneously on or after the fuel injected by the main injection has spontaneously ignited and before the partial oxidation reaction occurs.

Abstract: A piston crown for a piston of a pair of pistons in a two-stroke, opposed-piston, compression ignition combustion engine has a barrier layer and a conductive layer. The barrier layer at least partially surrounds a combustion chamber formed by the piston crown and an end surface of an opposing piston. The conductive layer connects the crown to the rest of the piston body. The barrier layer and the conductive layer are joined either through welding or through the fabrication process. Optionally, the piston crown includes an insulating layer between the barrier and conductive layers.

Abstract: The multi-layer gasket assembly includes a plurality of metal gasket layers which have at least one set of axially aligned openings. The plurality of gasket layers includes at least two functional layers which are arranged in a stacked relationship with one another. Each functional layer has at least one full embossment bead that is spaced radially from and surrounds the at least one opening. The functional layers are also arranged such that the full embossment beads are in a nested relationship with one another. At least one stopper is positioned adjacent the nested full embossment beads for preventing full flattening of the full embossment beads.

Abstract: Thrust reverser assemblies and a method of operating an aircraft during a landing approach mode of operation are provided. The thrust reverser assembly includes a moveable portion that is moveable over a continuous range of travel between a fully stowed position and a fully deployed position. Movement away from the fully stowed position opens a bleed passage. An actuator assembly coupled to the moveable portion is operable in an intermediate forward thrust mode to modulate a position of the moveable portion along the continuous range of travel, such that an air flow through the bleed passage is correspondingly varied. A throttle device includes a first position associated with deployment of, and a second position associated with engagement of, the intermediate forward thrust mode of operation. A drag flap assembly may extend from the bleed passage during the intermediate forward thrust mode of operation.

Abstract: A combustion engine and a method of operating the combustion engine are disclosed. The method comprises supplying a charge gas to the combustion chamber through an intake port; discharging a cryogenic fuel in a liquid state from a fuel injector in fluid communication with the combustion chamber; closing an intake valve to close the combustion chamber; and actuating a piston during a compression cycle to compress the charge gas and the cryogenic fuel. At least a portion of the cryogenic fuel evaporates in the closed combustion chamber.

Abstract: An internal combustion engine injector valve or combustion initiator has a portion that is a catalyst for a steam reformation process that takes place in a combustion chamber of the internal combustion engine following injection of a steam reforming fuel and an aqueous fluid into the combustion chamber during an intake gas compression phase of an operating cycle of the internal combustion engine.

Abstract: An internal combustion engine includes an air intake system in communication with a plurality of cylinders. An exhaust system is in communication with the plurality of cylinders. An EGR passage is in communication with the exhaust system and the air intake system. The EGR passage includes an EGR cooler with an EGR inlet end with a passage having a first portion extending in one direction in an assembled condition toward an intermediate section. The passage includes a second portion extending in an opposite direction from the intermediate section toward an EGR outlet end. A first cooler matrix is disposed in the first portion and a second, optional, cooler matrix disposed in the second portion. A thermally separated bypass channel is provided to allow a fast warm-up and guarantee the lowest possible pressure drop. The EGR cooler shape allows a compact packaging around the bypass pipe.

Abstract: An engine system is provided. The engine system may include an exhaust gas heat exchanger valve including an actuatable valve plate, a valve actuation assembly adjusting the position of the valve plate through operation of mechanical linkage coupled to the valve plate, and a flow reversal valve positioned in a coolant passage, the flow reversal valve configured to reverse the coolant flow in a flapper coolant conduit to trigger actuation of the mechanical linkage.

Abstract: A method of providing recirculated exhaust to an internal combustion engine. The engine has an EGR (exhaust gas recirculation loop) which may be a high pressure loop, a low pressure loop, or a dedicated cylinder loop. A catalyzed heat exchanger on the EGR loop has a steam reformation catalyst and a heat exchanger. The heat exchanger uses hot exhaust gas from the main exhaust line to heat the catalyst. A methane fuel source adds methane to the recirculated exhaust stream before it enters the catalyst, and the catalytic reaction increases the amount of hydrogen and carbon monoxide in the recirculated exhaust.

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: An intake module of an air intake tract of an internal combustion engine is provided with an intake housing part that has at least one inlet for combustion air to be filtered and an outlet section. A filter housing part with an air filter element that filters the combustion air is provided. The filter housing part has an inlet section and at least one outlet for the filtered combustion air. An air connection between the outlet section of the intake housing part and an inflow side of the air filter element is provided. A fixed intake pipe part is arranged between the outlet section of the intake housing part and the inlet section of the filter housing part. The fixed intake pipe part at least partially forms the air connection between the outlet section of the intake housing part and the inflow side of the air filter element.

Abstract: Methods and systems are provided for a vacuum generating device. In one example, a vacuum generating device comprises a venturi device upstream of an annular fixture for adjusting an amount of vacuum provided to a vacuum consumption device.

Abstract: A coupling device for connecting at least two fluid-conducting components may include a connector that may have a securing ring. A locking ring may be arranged on the connector and be configured to transition in a circumferential direction between a securing position and a releasing position. The locking ring may include at least one locking element configured to interact with the securing ring. The locking element may be configured resilient in a radial direction. A connecting piece may be configured axially adjustable with respect to the connector and may include an outer securing groove. The locking element may radially engage into the securing groove when the locking ring is in the securing position to secure the connecting piece to the connector in the axial direction.

Abstract: A high pressure pump includes a pressurization portion, a discharge portion, a body portion, a valve member, an urging member, valve hold member and a limiting portion. The body portion includes a relief passage, an inlet, a valve seat, and an outlet. The valve member includes a large diameter portion and a small diameter portion. The small diameter portion is located between the valve seat and the large diameter portion and has an outer diameter smaller than an outer diameter of the large diameter portion. The valve hold member surrounding and holding the large diameter portion. The limiting portion capable of limiting a motion of the valve hold member in a separation direction. According to this, a pressure in a fuel rail from extraordinarily increasing again after the relief valve is opened once.

Abstract: The present invention is a system and method for adapting and modifying an existing mono-fuel delivery system for an internal combustion engine to run as a bi-fuel system by reusing and repurposing OEM components of the mono-fuel system. The bi-fuel system makes use of an integration plate that may be mounted to the system fuel filter in substantially the same location as the fuel filter is mounted in the mono-fuel configuration. The integration plate also may deliver either fuel types into the existing engine fuel intake port thus the system does not require the creation of a secondary fuel intake port for the secondary fuel. The integration plate may also be situated such that it minimizes the space it must use within the engine compartment and it may use the preexisting engine mounting points designed for the fuel filter in the mono-fuel system.

Abstract: A rotating fuel injector assembly for a vehicle engine includes a base, an internal tip, an intermediate coaxial tip, and an external coaxial tip. The internal tip may be configured to move between an extended closed position and a retracted open position relative to the base. The intermediate coaxial tip may include an opening defined in a base of the intermediate coaxial tip. The base and the opening abuts the internal tip when the internal tip is in the extended closed position. The external coaxial tip may move between an extended open position and a retracted closed position relative to the base. The external coaxial tip includes a plurality of apertures which may align with the at least one opening in the intermediate coaxial tip at a predetermined event.

Abstract: A cover for an internal combustion engine assembly that includes a pressurized fuel accumulator feeding fuel to at least one injector is provided, the cover defining, with a cylinder head, a volume designed to receive the common rail and the injector. The cover borders a first sub-volume, designed to receive the injector, and a second sub-volume separated from the first sub-volume by a separation wall of the cover and designed to receive the common rail. The cover includes a frame to be fitted on the cylinder head and a cap removably fitted on the frame. The separation wall is designed for the passage of a fuel connection connecting the injector to the common rail.

Abstract: A multi-stage fuel pump includes a casing having a fuel intake formed on one side thereof and a fuel discharge port formed on the other side thereof, and a plurality of impellers provided within the casing, having a plurality of blades disposed on a circumferential surface in an outward direction of the circumferential surface and having blade chambers formed between the blades and penetrating through upper and lower surfaces of the impellers to allow fuel to be discharged and introduced to and from upper and lower sides of the blades, and formed in multiple stages, wherein fuel intaken through the fuel intake according to rotation of the impellers is discharged to the fuel discharge port through the blade chambers of the impellers, and the numbers of the blades of each of the impellers are different, thereby reducing blade passage frequency (BPF) noise generated according to rotation of the impellers.

Abstract: The present invention relates to a dispenser nozzle for high pressure injection, of which injection pressure and efficiency are largely improved and the product lifespan is increased, and in which a tappet 100 has a leading end portion 101 formed in a conical shape, and a nozzle 110 includes a funnel-shaped accommodation part 111 formed for maintaining a predetermined gap G from an outer circumferential surface of the leading end portion 101 of the tappet 100, a funnel groove 112 formed in the center of a bottom surface 111a of the funnel-shaped accommodation part 111 such that the leading end portion 101 of the tappet 100 is inserted into the funnel groove 112 by a predetermined length, and an injection hole 113 penetratingly formed in the center of the funnel groove 112.

Abstract: A pre-overheat system for minimizing engine damage due to overheating includes a temperature sensor and a warning system that alerts the vehicle's operator (using light, sound, vibration, etc.) if temperatures exceed steady-state temperatures and/or reach higher pre-overheat temperatures. Steady-state temperatures are measurable when the vehicle is functioning normally (especially its cooling system) and is running in normal environmental conditions, but is lower than a redzone overheat temperature for the particular vehicle. When the redzone overheat temperature is reached, the vehicle has gotten too hot and is likely to sustain irreparable damage. The operator can reduce or prevent damage to the vehicle by taking corrective action (such as stopping and checking coolant level and clearing debris from clogged vents and screens) before the vehicle is overheated. A shutdown mechanism can shut off the vehicle before the redzone overheat temperatures are reached.

Abstract: The present invention relates to a mobile terminal capable of performing communication with a vehicle, and a method for controlling the same. A mobile terminal according to one embodiment of the present invention includes a terminal body, an antenna provided in the body, and a socket formed such that a vehicle key module is insertable, wherein the socket is located between the antenna and a printed circuit board (PCB) provided in the terminal body, such that the inserted vehicle key module is electrically connected directly to the antenna without passing through the printed circuit board.

Abstract: A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine has a power generator, a first storage unit that can be charged with and can discharge generated power generated by the power generator, a second storage unit that can be charged with and can discharge the generated power, two paths connecting the first storage unit and the second storage unit, a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition, and an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart.

Abstract: An ultracapacitor-based power source includes an ultracapacitor, a charger, output connections and a power source controller. The ultracapacitor-based power source is suitable for backup starting of a starter powered by a starter battery. The charger charges the UC from an energy source. The output connections connect to the starter in parallel with the starter battery. When a start attempt failure occurs, the power source controller connects the UC to the outputs. The connection directs current flow from the UC to the starter, thereby starting the starter from the UC.

Abstract: Various systems and methods are described for controlling pre-ignition in a boosted engine in a newly manufactured vehicle. One method comprises, during a pre-delivery phase of the vehicle, operating the boosted engine in a pre-delivery calibration with a first, higher enrichment, in response to a pre-ignition event. The pre-delivery calibration is deactivated during a post-delivery phase and the boosted engine is operated with a second, lower enrichment in response to a pre-ignition event.

Abstract: A spark ignition engine system for communicating data includes a capacitive discharge ignition system using a microcontroller for controlling the spark ignition of a light-duty internal combustion engine; a memory device communicated with the microcontroller, wherein the micro-controller obtains engine data from the light-duty internal combustion engine and stores the engine data or software using the memory device; and a powering connection and a separate data connection that are electrically connected to different pins of the microcontroller, wherein the powering connection supplies power to the microcontroller while engine data or software is communicated via the data connection.

Abstract: A control device for an internal combustion engine is programmed, during a catalyst warm-up control, to perform first fuel injection by an injector in an intake stroke, control an ignition device so as to generate a discharge spark in a predetermined period in an expansion stroke, and perform second fuel injection, at a timing retarded from a compression top dead center, such that its injection period overlaps with at least a part of the predetermined period and an end timing of the injection period is advanced from an end timing of the predetermined period. Further, the control device is programmed, during the catalyst warm-up control, to control an actual tumble ratio depending on a result of determination using a first index value representing a speed of initial combustion accompanying an ignition by the ignition device and a second index value representing a speed of main combustion accompanying the ignition.

Abstract: A system for controlling the flow of turbined water from a plurality of hydroelectric plants arranged in series along a watercourse with an open channel flow, defining upstream of each plant, a plurality of head races subject respectively to hydraulic flow and level constraints. The flow of water turbined by each of the plants is controlled by a flow setpoint. The system includes regulation of a global electrical production power set-point for the plurality of hydroelectric plants by a flow regulation setpoint taking into account the flow setpoint of each of the plants. The flow regulation setpoint determined by the regulation is weighted for each of the plants by weighting coefficients as a function of the respective hydraulic characteristics of the head plurality of races.

Abstract: The invention relates to a lifting beam for lifting and handling a rotor blade of a wind energy plant, comprising a fastening means for fastening the lifting beam to a crane, at least one fastening means for fastening the lifting beam to the rotor blade a longitudinal pivoting means for pivoting the rotor blade which is supported by the lifting beam about a longitudinal axis of the rotor blade, and/or a transverse pivoting means for pivoting the rotor blade which is supported by the lifting beam about a transverse axis perpendicular to the longitudinal axis. The invention further relates to a method for mounting rotor blades of a wind energy plant using a lifting beam according to the invention.

Abstract: A rotor blade for a wind turbine, having a longitudinal rotor blade base body extending in a longitudinal axis, with the rotor blade base body defining a leading edge and a trailing edge of the rotor blade is provided, wherein the rotor blade base body has a number of panel elements, wherein at least one panel element includes at least one stiffening structure member embedded within the at least one panel element.

Abstract: A method of estimating an amount of undesired loading experienced by at least a portion of a structure (100) is provided. The structure (100) may be, for example, a wind turbine generator (WTG) and the portion for which undesired loading is estimated may be, for example, a rotor (130) of the WTG. The method includes receiving a first signal characterizing instantaneous stress experienced by a component (140) of the structure (100) and filtering out at least a portion of the received first signal that corresponds to the desired loading experienced by the component to produce a first filtered signal. The amount of undesired loading experienced by the at least a portion of the structure (100) is estimated based at least partially on the first filtered signal.

Abstract: Systems for assembling a wind turbine without the assistance of cranes. According to some implementations a system is provided that includes lifting systems having lifting platforms arranged peripherally around the tower. The lifting platforms cooperate with different connection tools that can be supported on an auxiliary column and thus lift or lower the tower modules.

Abstract: A method for moving a wind turbine component (42) relative to a wind turbine (16) having a tower (18) with a door (26) for closing off an opening (90) through the tower (18) includes removably positioning a transport system (40) relative to the wind turbine (16), the transport system (40) having a track (44) and a powered drive device (118), such that a first end (78) of the track (44) is positioned outside the tower (18), a second end (80) of the track (44) is positioned inside the tower (18), and the track (44) extends through the opening (90) in the tower (18). The transport system (40) is configured to facilitate movement of the wind turbine component (42) between an inside of the tower (18) and an outside of the tower (18) through the opening (90). The method further comprises moving the wind turbine component (42) vertically within the tower (18) away from or toward the track (44) using the powered drive device (118) of the transport system (40).

Abstract: The invention relates to a device for accumulating inertial energy having a rotor chamber in housing, a rotor in the rotor chamber having a first end face and a substantially opposite second end face, the rotor being mounted, so that it can be displaced and rotate relative to the housing leaving free a gap between the outer rotor perimeter and the inner perimeter of the rotor chamber, wherein a seal is provided in said gap separating a first section of the rotor chamber and a second section of the rotor chamber, exposing means; creating a differential pressure over the rotor for levitation thereof, wherein the device further comprises stabilizing means for counteracting vibration of the rotor.

Abstract: A thermo-acoustic engine and/or cooler is provided and includes an elongated tubular body, multiple regenerators disposed within the body, multiple heat exchangers disposed within the body, where at least one heat exchanger is disposed adjacent to each of the multiple regenerators, multiple transducers axially disposed at each end of the body, and an acoustic wave source generating acoustic waves. At least one of the acoustic waves is amplified by one of the regenerators and at least another acoustic wave is amplified by a second one of regenerators.

Abstract: A variety of embodiments of an at least partially flexible actuator are provided. The actuator includes a phase change material contained within an at least partially flexible enclosure of the actuator. Application of heat, using a heater of the actuator, to the phase change material causes the phase change material to boil, increasing the volume of the actuator and/or increasing a pressure within the actuator. As a result, the actuator can be used to apply a force to objects in an environment of interest. The actuator could be incorporated into a wearable blood pressure cuff and used to apply pressure to a body part of a wearer in order to detect a blood pressure of the wearer. In other examples, the actuator could be incorporated into a wearable device and used to secure a sensor or other elements of the device against skin of a wearer.

Abstract: A self-contained ion powered aircraft assembly is provided. The aircraft assembly includes a collector assembly, an emitter assembly, and a control circuit operatively connected to at least the emitter and collector assemblies and comprising a power supply configured to provide voltage to the emitter and collector assemblies. The assembly is configured, such that, when the voltage is provided from an on board power supply, the aircraft provides sufficient thrust to lift each of the collector assembly, the emitter assembly, and the entire power supply against gravity.

Abstract: An electric compressor includes a housing a compression mechanism, an electric motor and a motor driving circuit. The motor driving circuit includes a circuit board and an electronic component mounted on the circuit board. The electric compressor further includes a bus bar, a shield plate having a bolt hole and an intervening portion interposed between the bus bar and the shield plate. The bus bar, intervening portion and the shield plate are integrated by a resin member. A part of the intervening portion on a side thereof opposite from the shield plate and/or a part of the bus bar on a side thereof opposite from the shield plate is exposed without being covered with the resin member. A surface of the shield plate around the bolt hole on a side thereof opposite from the intervening portion is exposed without being covered with the resin member.

Abstract: An apparatus including a movable cryopump that may be disposed in a first operational position and a second regeneration position is disclosed. In the first operational position, the front surface of the cryopump may be disposed in the same plane as the wall of the processing chamber, effectively serving as a part of a chamber wall. In certain embodiments, the front surface of the cryopump may extend into the processing chamber. In the second regeneration position, the cryopump is retracted into a cavity, which is isolated from the processing chamber by a movable gate. The first operational position serves to enhance the pumping speed of the cryopump, while the second regeneration position ensures that previously trapped molecules are not released back into the processing chamber.

Abstract: A reciprocating compressor is provided that may include a shell, a suction pipe coupled to the shell, a driver provided inside of the shell that generates a rotational force, a compression device including a connecting rod that converts the rotational force into a linear driving force, a piston coupled to the connecting rod, and a cylinder into which the piston is movably inserted, a suction muffler provided inside of the shell that reduces a pressure pulsation of a refrigerant suctioned through the suction pipe, and a suction guide that extends from the shell to the suction muffler and includes at least one protrusion that contacts an inner surface of the shell.

Abstract: An inflator having an enhanced cooling effect on its motor is disclosed, which includes a box composed a cover and a base, and a compressor unit installed in the box. The box is provided with airflow-guiding members cooperated with a cooling fan fitted at a rotating shaft of a motor used in the compressor unit to allow outside air to be quickly drawn into the interior of the box. Thereafter, the airflow can be guided by the airflow-guiding members to enter the interior of the motor to dissipate the heat generated by the rotor assembly in the motor and finally go out of the box. Therefore, heat is not easy to accumulate in the motor, so that maximum power output of the motor can be achieved, and the performance and service life of the motor can be increased.

Abstract: A spot-cooling system including an electroactive polymer actuator, an enclosure defining an internal cavity, and a port in the enclosure is described herein. The electroactive polymer actuator may be configured to draw air into the enclosure. The electroactive polymer actuator may be configured to force air from the enclosure. The electroactive polymer actuator may comprise a corrugated electroactive polymer actuator. The electroactive polymer actuator may comprise a plurality of layered electroactive polymer actuators.

Abstract: A conveying device at least for conveying a fluid, includes at least one conveying space, with at least one conveying space element, which at least partly delimits the conveying space and is embodied in a rigid fashion, and with at least one elastically deformable conveying element, which forms the conveying space together with the conveying space element, at least the conveying space element and the conveying element together form an exchangeable unit. The conveying element is arranged on the conveying space element in an at least partly convexly curved fashion, following a deformation, the conveying element automatically seeks to re-assume a basic shape, and the conveying element is connected to the conveying space element in a non-releasable manner.

Abstract: A tube pump includes a tube, a housing member having a cylindrical chamber including an inner peripheral surface, a rotator having a first shaft and a first portion, the first portion having a guide, and a roller having a first shank received by the guide. The tube pump includes a contact member having a contact portion in the cylindrical chamber extending outwardly towards the inner peripheral surface at least the first distance and less than the second distance, the contact portion being configured to selectively contact the roller.

Abstract: A pump and a method of operating the pump at a duty-cycle based on the input voltage of the power source energizing the pump. The pump includes at least a first opto-coupler electrically coupled to the power source. The method includes detecting at least a first opto-coupler state transition; determining a zero-crossing of the input voltage; determining an elapsed time between the zero-crossing and the first opto-coupler state transition; and operating the pump by energizing a power switch at a duty-cycle based on the elapsed time.

Abstract: A compressor control apparatus includes a rectifying unit configured to rectify power applied from the outside, a DC link unit configured to include a pair of capacitors and smooth the rectified voltage, an inverter unit configured to include a pair of switches and convert the smoothed DC voltage into a driving voltage of a motor according to a control signal, and a control unit configured to generate the control signal, wherein the control unit applies a DC offset voltage to the driving voltage according to a direction of a current applied to the motor on the basis of a result obtained by comparing voltages across the pair of capacitors.

Abstract: A pump monitoring device is configured to be connected to a case drain of a pump. The device includes a manifold having an inlet for connection to the case drain. A flow rate sensor generates a signal indicative of a flow rate of fluid in a fluid path. The flow rate sensor includes a temperature sensor, a heater, and a sensor barrel. The heater heats the sensor barrel while in fluid communication with the fluid. A pressure sensor generates a signal indicative of a pressure of the fluid.

Abstract: In a reciprocating pump which performs a pumping action by causing a reciprocating member to reciprocate as a driving part including a driving shaft accommodated in a driving part case is driven, a portion of the driving part is immersed in a lubricating oil in the driving part case, and one or more ribs are provided on an upper part of an inner wall forming the driving part case so as to be directed inward.

Abstract: An internal-gear pump has a housing which has a first fluid port and a second fluid port. An inner rotor is mounted in the housing so as to be rotatable about an inner rotor axis and has an external toothing. An outer rotor is rotatable in the housing about an outer rotor axis and has an internal toothing which, to generate a pump action, engages with the external toothing of the inner rotor. The internal-gear pump furthermore has a ring element which is mounted movably in the housing so as to be pivotable between a first position and a second position. At least a third fluid port is formed on the housing. The third fluid port is arranged relative to the ring element such that, in the first position of the ring element, the third fluid port is connected to the second fluid port. In the second position, said third fluid port is separated from the second fluid port.

Abstract: A sliding vane pump includes a passageway that fluidly connects one or more pumping chambers to a side chamber. The passageway pressurizes the side chamber. This fluid pressure exerts a force that counteracts the force caused by pressure differences between the outlet pumping chambers and the inlet pumping chambers. At high speed, part of the side chamber is pressurized by the smallest volume outlet pumping chamber while another portion of the side chamber is pressurized by the largest volume outlet chamber. This results in a force counteracting an uncommanded displacement decrease of the pump.