Abstract: An electronically controllable pneumatic brake system for a vehicle. The electronically controllable pneumatic brake system includes wheel brakes configured to brake wheels of the vehicle, wherein a service brake braking pressure can be imposed on each of the wheel brakes via pneumatic paths starting from a foot brake valve; and an electronically controllable monostable bypass valve having a first switching position and a second switching position, wherein the monostable bypass valve is disposed in a respective pneumatic path of the pneumatic paths. In the first switching position of the monostable bypass valve, a service brake braking pressure in the respective pneumatic path can be derived depending on an actuation pressure produced by manual actuation of the foot brake valve. In the second switching position of the monostable bypass valve, the service brake braking pressure in the respective pneumatic path can be specified depending on a reservoir pressure prevailing in a reservoir.

Abstract: Provided are sampling pumps and gas analyzers using the sampling pumps. The sampling pump may include at least one reciprocating pump set and a control system. Each reciprocating pump set can include two reciprocating pumps. The control system can output drive signals for controlling reciprocating drawing and compressing operations of the reciprocating pumps, where the control system may be designed to output the drive signals that cause the two reciprocating pumps within the same set to provide opposing impact directions at the same time.

Abstract: An oil pump includes a hollow rotor having an inner peripheral portion defining a space inside of the inner peripheral portion. A first one-way clutch configured to transmit the motive power input from an engine side, to the rotor only in one direction, and a second one-way clutch configured to transmit the motive power input from an electric motor side, to the rotor only in the one direction are arranged inside of the inner peripheral portion of the rotor.

Abstract: A compressor that includes a casing, a compression mechanism provided inside the casing to compress a refrigerant, a rotary shaft transmitting a rotational force to the compression mechanism from a drive source provided outside the casing, a clutch connecting the drive source and the rotary shaft by a magnetic force generated when electric power is applied to the clutch and disconnecting the drive source and the rotary shaft by losing the magnetic force when the electric power applied thereto is cut off, and a rotation measurement means for receiving the magnetic force from the clutch to measure a change in magnetic flux according to the rotation of the rotary shaft and measure a rotational speed of the rotary shaft. Thus, it is possible to measure the rotational speed of the rotary shaft without including a permanent magnet.

Abstract: Disclosed herein is a rotary compressor capable of maintaining the overall dynamic balance and providing low vibration and low noise even at high speed operation and capable of improving efficiency by providing a communication passage to communicate operation chambers, which are provided inside each of the plurality of cylinders for compressing a refrigerant, to each other. The rotary-type compressor includes a housing, a drive motor provided inside the housing to generate power and having a stator and a rotor, and a compression unit that receives power from the drive motor and compresses the refrigerant. The compression unit includes a plurality of cylinders in which an operation chamber to compress the refrigerant is provided. The operation chambers provided in each of the plurality of cylinders are provided to have different volumes, and a balancer provided to maintain dynamic balance is provided only in the lower side of the rotor.

Abstract: Disclosed is an air compressor in which a driving shaft and a crankshaft tube that surrounds the driving shaft are axially coupled, a clutch is installed between the driving shaft and a rear end of the crankshaft tube, and an air cylinder including a steam cylinder, a piston spaced apart at a certain distance from the steam cylinder, and an interval former installed between the steam cylinder and the piston is installed in a crankcase that forms a pump chamber, to prevent frictional ring plates that rub steel ring plates of the clutch together from being worn by a determined thickness or more by the interval former and simultaneously to cut off supplying of compressed air to the inlet of the air cylinder by the interval former in such a way that a connection state between the driving shaft and the crankshaft tube is continuously maintained.

Abstract: An oil pump driving device includes an oil pump to be driven by either of an engine and an electric motor, and is short in axial dimension. The oil pump driving device includes a first one-way clutch for transmitting motive power from the engine only in one direction, and a second one-way clutch for transmitting motive power from the electric motor only in the above one direction. The first one-way clutch is disposed within an opening formed in a partition wall of a transmission case. The oil pump includes a rotor having an inner peripheral portion defining a hollow space. The second one-way clutch is disposed inside of the inner peripheral portion of the rotor.

Abstract: Provided are sampling pumps and gas analyzers using the sampling pumps. The sampling pump may include at least one reciprocating pump set and a control system. Each reciprocating pump set can include two reciprocating pumps. The control system can output drive signals for controlling reciprocating drawing and compressing operations of the reciprocating pumps, where the control system may be designed to output the drive signals that cause the two reciprocating pumps within the same set to provide opposing impact directions at the same time.

Abstract: A functional water producing apparatus in an embodiment includes: a water pressure regulator configured to regulate the water pressure of the ultrapure water, the water pressure regulator having a pressure regulating valve configured to regulate a water pressure of the ultrapure water to an almost constant pressure and a feed water pump configured to pressurize the ultrapure water; a dissolving device configured to dissolve functional gas imparting a specific function in the ultrapure water regulated the water pressure by the water pressure regulator; and a control device configured to control the feed water pump to regulate the water pressure of the functional water to a predetermined constant pressure based on a water pressure or a flow rate of the functional water flowing out of the dissolving device.

Abstract: A control system for hermetic cooling compressor includes a reciprocating compressor (3) and an electronic control (2) for the reciprocating compressor (3). The electronic control (2) is configured for, after commanding the turning off of the reciprocating compressor (3), detecting whether the turn velocity (23) of the turning axle (10) is below a predefined velocity level, and then applying a braking torque (36) that causes deceleration of the turning axle (10) before completing the next turn of the turning axle (10), in case the turn velocity (23) detected is below the velocity level (34).

Abstract: A pump for a heat pump system includes a piston having a cam follower positioned on a bearing surface of a cam. A casing includes a first casing portion and a second casing that are mounted to each other. A piston head of the piston is disposed within the first casing portion, and the piston extends through the second casing portion. A spring urges the cam follower of the piston towards the bearing surface of the cam.

Abstract: A hydraulic control device includes an oil pump for generating a hydraulic pressure by being rotated by power of a driving force source, a driving force source stopping unit that stops rotation of the driving force source when a predetermined condition holds, and a cut-off unit that cuts off transmission of the power from the driving force source to the oil pump when the driving force source rotates in a reverse direction as the rotation of the driving force source is stopped by the driving force source stopping unit.

Abstract: An actuator of a variable compression ratio mechanism includes: a control link; an arm link; a control shaft; a housing including a receiving portion in which a connection portion between the second end portion of the control link and the arm link is received, and a support hole formed within the housing, and rotatably supporting the control shaft; and a speed reduction device, the control shaft including a fixing portion inserted and fixed within the receiving portion in a fixing hole formed in the arm link at a predetermined axial position, and a first journal portion which is formed at a tip end portion of the control shaft, which has a diameter smaller than a diameter of the fixing portion, and which is supported by a first bearing hole formed in the support hole.

Abstract: A device for driving an ancillary unit of an internal combustion engine includes the ancillary unit having a mechanical drive, joined to a first coupling section, and an electric drive having a rotor and a stator with windings. The rotor is joined to a second coupling section and non-rotatably to a shaft. The shaft is joined to a component of the ancillary unit to be driven. The rotor is movable axially along a lengthwise extension of the shaft and axially with respect to the shaft. The first and second coupling sections are movable relative to each other by means of the axial movement of the rotor so as to either join together or separate the mechanical drive and the rotor, the rotor being movable axially along the lengthwise extension of the shaft with respect to the shaft in such a way that an electric current flows through the windings.

Abstract: The present disclosure relates to a hydraulic drive having a stationary housing. The hydraulic drive also has a drive shaft that extends through the stationary housing. Furthermore, the hydraulic drive has a hydraulic motor for rotating the drive shaft relative to the stationary housing. Additionally, the hydraulic drive includes a driven hub adapted to be connected to a rotatable driven element. The hydraulic drive also has a coupling/decoupling arrangement that allows the hydraulic drive to be operated in an engaged mode where the drive shaft is coupled to the driven hub in a direct drive arrangement and a disengaged mode where the drive shaft is decoupled from the driven hub. When the hydraulic drive is operated in the engaged mode torque from the drive shaft is transferred to the driven hub causing the driven hub to rotate relative to the stationary housing. When the hydraulic drive is operated in the disengaged mode the driven hub can free wheel relative to the drive shaft.

Abstract: A pump drive for an extracorporeal blood pumping system including an adjustable drive magnet. The pump drive may be coupled to a blood pump which includes a pump impeller. The pump drive may include a stepper motor for dynamically adjusting the position of the drive magnet. The position of the drive magnet may be varied to vary the distance between the drive magnet and an impeller magnet of the pump impeller. Adjusting the position of the drive magnet may include dynamically adjusting the drive magnet and may include axially moving the drive magnet to thereby vary a magnetic attraction force between the drive magnet and the impeller magnet which may thereby minimize forces acting on one or more bearings of a pump impeller.

Abstract: A drive system for a hybrid vehicle includes a planetary gear unit, a first rotating machine connected to a sun gear of the planetary gear unit, an engine connected to a carrier of the planetary gear unit, a second rotating machine and drive wheels connected to a ring gear of the planetary gear unit, a regulating mechanism that regulates rotation of the carrier, a first running mode in which the vehicle runs using the second rotating machine as a power source, and a second running mode in which the vehicle runs using the first rotating machine and the second rotating machine as power sources while the regulating mechanism regulates rotation of the carrier. The carrier is rotated by the first rotating machine when the vehicle shifts from the first running mode to the second running mode.

Abstract: An air compressor device includes a cylinder housing and a supporting plate. The air compressor further comprises a piston engaged in the cylinder housing and having a piston rod, a gear and an eccentric member attached to the supporting plate with a shaft. The eccentric member includes an eccentric pin coupled to the piston rod. A motor includes a protrusion engaged into an orifice of the supporting plate, with a spindle extended out of the protrusion and extended through the orifice of the supporting plate. The motor further includes a pinion attached to the spindle and engaged with the gear. The pinion includes an outer diameter greater than an outer diameter of the protrusion of the motor.

Abstract: An electromagnetic clutch is configured to achieve a cutoff state by changing a winding diameter of a wrap spring. The electromagnetic clutch includes a driving element connected to a shaft and supporting one end of the wrap spring, an operating element fitted on the shaft and supporting the other end of the wrap spring, and an armature rotatable in unison with the shaft between the driving element and operating element and movable along a rotational axis. A main aperture is formed in the operating element while an auxiliary aperture is formed in the armature to achieve a positional relationship to electrify an electromagnetic solenoid to attract the operating element and then allow rotation of the driving element by dynamic inertia and attract the armature to the operating element with the wrap spring being remote from an inner surface of an input pulley.

Abstract: A compact-size electromagnetic clutch reaches a blocking state as an electromagnetic solenoid is switched from a non-driving state to a driving state and can save wasteful consumption of energy under this blocking state. This electromagnetic clutch includes a wrap spring in pressure-contact with an outer face of a cylindrical portion of a drive pulley provided on the center side thereof. One end of the wrap spring is coupled to a drive arm of a drive member operably connected to a shaft. The other end of the wrap spring is coupled to an operational member rotatable relative to the shaft and movable along the rotational axis thereof. An electromagnetic solenoid attracts the operational member. An operational mechanism permits realization of the blocking state by preventing rotation of the drive member after a twisting operation of the wrap spring subsequent to the attraction of the operational member by this electromagnetic solenoid.

Abstract: The invention relates to a drive train (1) for a hydraulic drive where a friction coupling (3) is arranged between a hydraulic machine (2) and a consumer (5). The coupling (3) has two parts (20A, 20B) which are displaceable towards each other in the axial direction (18) and are connected to the hydraulic machine (2) or to the consumer (5). Hydraulic fluid is introduced by means of a pressure line (28) into a pressure chamber (27) formed between the parts (20A, 20B), as a result of which the complementarily formed friction surfaces (9A, 9B) become frictionally locked together and a torque is able to be transmitted between the hydraulic machine (2) and the consumer (5). The friction surfaces (9A, 9B) are each fixedly connected at least radially to the shaft of the hydraulic machine (2) or of the consumer (5).

Abstract: A screw compressor including a driving machine having an output shaft coupled to an input shaft of a compressor main body; a clutch mechanism between the output shaft of the driving machine and the input shaft of the compressor main body; a pressure sensor installed in a discharge channel; and a controller that controls the switching of the clutch mechanism between an engaged state and a disengaged state based on a discharge pressure value detected by the pressure sensor is disclosed. When the discharge pressure value becomes higher than an unload set value that is predetermined, the controller controls the clutch mechanism to be switched to the disengaged state. According to the above screw compressor, power losses are reduced even when the supply of compressed gas is hardly required.

Abstract: A vane compressor includes a cylinder block, a cylinder chamber having an ellipsoidal inner wall, a rotor whose outer circumferential surface is provided with vane slots formed thereon, a drive source for the rotor, and vanes housed in the vane slots, respectively. The rotor is rotated by the drive source while the vanes are protruded from the vane slots by backpressure generated in backpressure spaces in the vane slots to contact end edges of the vanes with the inner wall of the cylinder chamber. The compressor further comprises a stop mechanism that makes the rotor stopped at a predetermined rotational position where a difference between a total volume of the backpressure spaces when operated and a total volume of the backpressure spaces when stopped becomes minimum. According to the compressor, chattering can be prevented without extra workings on the vanes or the rotor and without providing extra parts.

Abstract: Methods and systems for controlling the operation of a dual mode engine accessory, such as a dual mode cooling pump. The dual mode device has two modes of operation, an electric motor operation and a mechanical pulley-driven operation. A friction clutch mechanism controlled by the control system is utilized to switch between the two modes of operation. The speed of the electrical motor can be changed to be substantially the same as, or changed in the direction of, the speed of the mechanical pulley-driven system.

Abstract: A mechanical combustion engine coolant pump for pumping a coolant for an internal combustion engine includes a stationary cylindrical support body. A rotatable driving wheel is supported by a driving wheel roller bearing at the stationary cylindrical support body. The rotatable driving wheel is configured to be driven by the internal combustion engine. A pump wheel is arranged at a rotatable rotor shaft. The pump wheel is supported by a shaft roller bearing at the stationary cylindrical supporting body. A switchable friction clutch is configured to couple the rotatable driving wheel with the pump wheel. The stationary cylindrical support body integrally comprises an inner ring of the driving wheel roller bearing. The stationary cylindrical support body integrally comprises an outer ring of the shaft roller bearing.

Abstract: A mechanical fluid pump driven by a combustion engine includes an input shaft which is directly driven by the combustion engine, a pumping unit comprising a pump rotor, and a clutch arranged between the input shaft and the pump rotor. The clutch is provided as a magneto-rheological clutch comprising two clutch bodies, a fluid gap arranged between the two clutch bodies, the fluid gap being filled with a magneto-rheological fluid, and a permanent magnet element which is shiftable between an engaged position where a magnetic field penetration flux of the permanent magnet element penetrates the fluid gap with a high magnetic flux, and a disengaged position where the magnetic field penetration flux of the permanent magnet element is less than in the engaged position. An actuator is configured to move the permanent magnet element between the engaged position and the disengaged position.

Abstract: The present invention provides methods and systems for a device for producing compressed air that allows for the expeditious adjustment of a drive belt that includes a base having a substantially triangular shape with at least a first side having a top portion and a bottom portion, a second side having a top portion and a bottom portion, and a third side having a top portion and a bottom portion. The first side, second side, and third side collectively form a cavity therein. A motor is disposed within the cavity of the base and engaged to the first side of the base. A first compressor is slidingly engaged to the second side of the base and a second compressor is slidingly engaged to the third side of the base.

Abstract: An oil supply apparatus for a vehicle may include an oil pump, a first rotary member provided to the oil pump such that the oil pump may be rotatably operated by the first rotary member, a second rotary member restricted from rotating with respect to the first rotary member in a first direction, the second rotary member being allowed to rotate with respect to the first rotary member in a second direction opposite to the first direction, and a third rotary member allowed to rotate in the first direction with respect to the first rotary member, the third rotary member being restricted from rotating with respect to the first rotary member in the second direction opposite to the first direction, wherein the second rotary member and the third rotary member may be respectively connected to power sources providing drive forces in directions opposite to each other.

Abstract: An exhaust aftertreatment system for an engine is provided that includes a burner, an air supply system and a control module. The air supply system may be in fluid communication with the burner and may include an air compressor disposed upstream from the burner. The air compressor may include a pump mechanism, a clutch assembly selectively transferring torque from the engine to the pump mechanism, and a motor selectively driving the pump mechanism. The control module may be in communication with the clutch assembly and the motor. The control module may selectively switch the air compressor between a first operating mode in which the clutch assembly transfers torque from the engine to the pump mechanism and a second operating mode in which the motor drives the pump mechanism.

Abstract: This disclosure relates a water pump control system for an internal combustion engine, and a method for operating an internal combustion engine including a clutch-controlled water pump. The water pump control system and method provide protection of the pump impeller during dry pump operation, such as when a watercraft engine is started while the watercraft is out of water, by turning off the clutch-controlled pump when no water is detected at the inlet of the water pump.

Abstract: A hydraulic system for a vehicle powertrain includes a module including a clutch, an electric machine and a first sump, a transmission including a line pressure source and a second sump, and a pump that supplies fluid from the first sump to the line pressure source when the source of line pressure is unavailable, and supplies fluid from the first sump to the second sump when fluid volume in the second sump is low.

Abstract: The invention relates to a switchable coolant pump for combustion engines which is driven by a pulley, wherein the impeller can be driven switchably by the pulley by way of a friction pairing. The switchable coolant pump according to the invention, comprising a connecting flange (9) for a pressure booster (10), the flange being disposed on the pump housing (1), and a working piston (14) disposed in a working cylinder (15), is characterized, among other things, in that on/in the pump housing (1) both the pulley (3) in a pulley bearing (2) and the pump shaft (5) in a pump bearing (4) are mounted separately, and a sleeve receptacle (17) is disposed in the pump housing (1), wherein an annular channel (19) is located in the annular bottom (18) of the receptacle, and an annular piston working sleeve (21) is inserted in the sleeve receptacle (17) in the pump housing (1), and an annular piston (24) that is provided with an annular piston packing (23) is disposed displaceably in the annular piston working sleeve (21).

Abstract: A system for driving a pump includes a gas turbine engine having an output shaft, and a torque converter including an input shaft coupled to the output shaft of the gas turbine engine and an output shaft configured to be coupled to an input shaft of a pump. The system further includes a controller coupled to the torque converter, wherein the controller is configured to receive a signal indicative of a pressure at at least one of a pump inlet and a pump outlet, and control a speed of the output shaft of the torque converter based on the signal indicative of pressure.

Abstract: A compressor for generating compressed air in a vehicle includes a crankshaft and an interface area for fastening a clutch device by means of which the crankshaft of the compressor can be connected to or disconnected from a drive device. The interface area is configured to receive a crucible-shaped receptacle element. The crucible-shaped receptacle element can be a cylinder for receiving a piston that can be acted on by a pressure medium for actuating the clutch device.

Abstract: A control system (100) for an all-wheel-drive torque transfer case (102) coupling of a motor vehicle (104) including a power unit (130) having a centrifugally governed fluid pump (132) and a flow valve (134) movable between recirculation and diverter positions (134a, 134b). A control valve (136) located between the fluid pump (132), the all-wheel-drive clutch assembly (112), and the range shift assembly (120). The control valve (136) operable between a first position (136a) allowing fluid flow between the pump (132) and the clutch assembly (112), and a second position (136b) allowing fluid flow between the pump (132) and the range shift assembly (120). At least one range shift valve (138; 152, 154) located between the control valve (136) and the range shift assembly (120).

Abstract: A liquid pressure generating apparatus including a pump, and two one-way clutches arranged coaxially with the pump drive shaft in a line in the axial direction on the side of a first axial direction. The pump case includes a projecting portion projecting from the corresponding pump case. Inner races of the respective two one-way clutches are integrated with each other and form a common inner race. Outer races of the respective two one-way clutches are formed independently from each other and are driven respectively by pump driving members different from each other, and directions of restricted relative rotation with respect to the common inner race are identical to each other. The common inner race includes a coupling portion to be coupled to the pump driving shaft on the side of the first axial direction with respect to the projecting portion.

Abstract: Methods and systems are provided for pressurizing a transmission hydraulic circuit including a transmission mechanical pump coupled to an engine though a gearbox. One example method comprises, during an engine start, adjusting a speed ratio between the transmission pump and the engine between a first speed ratio and a second speed ratio, the pump rotating faster relative to the engine at the first speed ratio as compared with the second speed ratio. In this way, the pump may be driven at different speed ratios relative to the engine to provide better pressurization in the transmission.

Abstract: An oil pump control apparatus of a hybrid vehicle is provided that controls an oil pump according to a demand of an output torque and oil temperature. In particular, hydraulic line pressure is controlled by operating an oil pump at maximum power if a starting demand for a hybrid vehicle is detected. Viscosity is calculated as well to correspond to an oil temperature in an engine stop mode and a rotation speed of the oil pump is controlled at a low power. Additionally, viscosity is also calculated according to a variation of a line pressure in a driving mode and the rotation speed of the electric oil pump is controlled in either a low power, a middle power, and a high power state as well.

Abstract: A machine having a pump overspeed protection system operating thereon includes an internal combustion engine, a plurality of ground engaging elements, and a drivetrain coupling the internal combustion engine and the ground engaging elements. The drivetrain includes a torque converter having a locked configuration and an unlocked configuration. The machine also includes a plurality of pumps driven by the internal combustion engine. An electronic control is in communication with the internal combustion engine, the torque converter, and the plurality of pumps.

Abstract: A water pump includes a housing, a pumping mechanism, and a pulley that receives an input torque. Rotation of a clutch disk provides a rotational force to the pumping mechanism. A ferromagnetic clutch ring rotates in unison with the pulley. The clutch ring moves between a disengaged position and an engaged position to selectively rotate the clutch disk in response to the input torque. A magnet disposed on the clutch disk attracts the clutch ring toward the engaged position, and an electromagnetic coil is operable to selectively diminish the attraction of the clutch ring to the magnet to move the clutch ring between the engaged and disengaged positions.

Abstract: A liquid pressure generating apparatus including a pump; and two one-way clutches arranged coaxially with the pump's drive shaft. Inner races of the respective two one-way clutches are integrated with each other to form a common inner race. Outer races of the respective two one-way clutches are formed independently from each other and are driven respectively by pump driving members different from each other. The common inner race includes a coupling portion coupled to the pump drive shaft and extending in the radial direction and a cylindrical body portion extending from the coupling portion in a second axial direction opposite from the first axial direction on the radially outside the pump drive shaft. The body portion includes a depression indented radially outward on an inner peripheral surface thereof. A lubricant supply portion for the depression is provided radially inside the depression.

Abstract: A pump system including a drive mechanism that provides a pumping force, a primary pump including a first pump cavity, an actuating element in reciprocal relation with the first pump cavity, and an outlet fluidly connected to a reservoir, a force translator that facilitates pump force transfer from the drive mechanism to the actuating element, a pressure regulation mechanism including a reciprocating pump that includes a pump chamber including an inlet manifold fluidly connected to the reservoir, a valve located within the inlet manifold, and a reciprocating element in reciprocal relation with the pump chamber. The pressure regulation mechanism preferably passively ceases force transfer from the drive mechanism to the primary pump based on the pressure of the reservoir.

Abstract: If a hydraulic system has several modes of operation, in particular a mode with a high pressure demand (II) and a mode with a high fluid flow demand (II), the hydraulic fluid pump has to be built with an accordingly high fluid flow output. Such a pump is expensive. Therefore it is suggested, to provide two pumps. I.e. a controllable main pump (2) is provided, which supplies the hydraulic consumer (6) during phases (I) of high pressure demand. During phases (II) of high fluid flow demand, normally, relatively low pressures are sufficient. Therefore, it is suggested to provide a parallel boost pump (9), which supplies the hydraulic consumer (6) in addition to the high pressure pump (2), if a high fluid flow is needed. Excess fluid flow output is avoided by controlling the fluid output flow of main pump 2.

Abstract: An integrated fluid handling apparatus 10 includes a power take off device 108 having a rotating power take off mechanism 122, a hydraulic pump 104 having a rotating fluid pump mechanism 146, a flow torque tube 106, and an electric motor/generator 102 having a rotating electric power conversion mechanism 173. A rotational power transfer system includes connector devices 128, 138, 166 and 172 that are drivingly connected to and that drivingly connect the mechanisms 122, 146 and 173 in one mode of operation. The electric motor/generator 102 includes heat exchange fluid flow passages that establish a fluid flow path to the inlet of the pump. The mechanisms 122, 146 and 173, and the connector devices 128, 138, 166 and 172 are assembled and used as a whole within a housing, without externally exposed mechanical drive connections and without externally exposed fluid connections, between such mechanisms and devices.

Abstract: A hybrid coolant pump with two modes of operation, an electric motor operation and a mechanical pulley-driven operation. A friction clutch assembly is positioned inside the motor housing and includes a softening spring which minimizes parasitic clutch power consumption.

Abstract: An apparatus for driving a pump for fueling a rocket engine of a space vehicle. The apparatus comprises an inertia wheel and a transmitting device to transmit a rotation of the inertia wheel to the pump. The apparatus further comprises a measuring device to measure the rotation speed of the inertia wheel a clutching device to decouple the wheel and the pump for a speed lower than a pre-determined speed lower, which is lower than the nominal rotation speed of the wheel. The invention is particularly applicable to a space vehicle comprising a rocket engine wherein the fuel supply system comprises at least one pump driven by the apparatus of the invention and a starting device to start the apparatus while the space vehicle is in flight.

Abstract: An automotive fluidic pump includes a driving device, a pump wheel, a hydraulic coupling configured as a magneto-rheological coupling comprising a rotatable driving clutch element which is permanently connected to the driving device. A rotatable driven clutch element is permanently connected to the pump wheel. A magneto-rheological liquid filling a working gap is arranged between the rotatable driven clutch element and the rotatable driving clutch element. A magnetic unit comprises a permanent magnet and an electromagnet. The permanent magnet and the electromagnet are each configured to magnetically affect the working gap. Each of the driving device and the pump wheel are connectable by the hydraulic coupling. The electromagnet is arranged to compensate a magnetic field created by the permanent magnet in the working gap when the electromagnet is activated.

Abstract: A system for changing a pump displacement configuration includes a blender that provides low-pressure fluid to a pump. The pump has a power end and fluid end, where the fluid end includes a number of plungers. The system includes an actuator that couples the power end with a selectable subset of the plungers. The system further includes a controller that selects a subset of the plungers according to a job pumping rate, a job pumping pressure, and/or a fluid end failure event indicator. The controller further commands the actuator to couple the selected subset of the plungers to the power end.

Abstract: A water pump for a vehicle includes a power transmitting member, a driven shaft rotated independently from the power transmitting member, an impeller, a biasing member for pressing an inner circumferential surface of the power transmitting member and for rotating in order to transmit a rotation of the power transmitting member to the driven shaft when the biasing member contacts the inner circumferential surface, and a control member for allowing the power transmitting member and the biasing member to come in contact with each other or to come out of contact from each other and for controlling a contacting state between the power transmitting member and the biasing member.

Abstract: An automotive air conditioning compressor assembly that includes a compressor capable of exhibiting an over-torque condition, an electromagnetic clutch, and an over-torque protection device located between the compressor and the accessory drive. The over-torque protection device is configured to decouple the compressor and the accessory drive when the over-torque condition occurs. The over-torque protection device uses a frangible part that breaks when an over-torque condition occurs and parts equipped with helical ramps to force the rotor and stator of the clutch apart to disengage the compressor from the vehicle accessory drive.