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公开(公告)号：US11293418B2
公开(公告)日：2022-04-05
申请号：US16197508
申请日：2018-11-21
申请人： AISIN CORPORATION
发明人： Hisashi Ono , Katsuhiko Takasu , Koji Nunami
IPC分类号： F04B9/04 , F04B1/0413 , F04B1/0426 , F04B1/0421 , F04B11/00 , F04B1/053 , F04B1/20 , F04B17/05
摘要： A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle α, α=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M−1) is N.
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公开(公告)号：US10655613B2
公开(公告)日：2020-05-19
申请号：US15296173
申请日：2016-10-18
申请人： DENSO CORPORATION
发明人： Chi Zhang
IPC分类号： F04B7/00 , F04B53/10 , F02D41/20 , F04B53/00 , F04B49/06 , F02D41/30 , F02M59/02 , F02M59/10 , F02M59/36 , F02D41/38 , F04B23/04 , F04B1/053 , F04B9/04 , F04B17/05 , F04B53/14 , F04B1/0456 , F04B1/0408 , F04B1/0426 , F04B1/04
摘要： When a condition for reducing a noise caused in the high-pressure pump is satisfied, a reduction control unit implements a noise reduction control to supply a smaller power to reduce a moving speed of a movable portion in a close acting direction to put a valve body into a closed state for a predetermined time after an energization start timing of a solenoid in a plunger rising period. A closing control unit causes a closing current, which is a constant current for surely putting the valve body into the closed state, to flow the closing current in the solenoid when the noise reduction control is completed in the plunger rising period. The predetermined time is shorter than an energization period in which a current flows in the solenoid.
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公开(公告)号：US20220275778A1
公开(公告)日：2022-09-01
申请号：US17625353
申请日：2020-06-09
发明人： Norbert Geyer , Marco Junker
IPC分类号： F02M59/10 , F04B1/0426 , F04B9/04 , F04B1/0408 , F01L1/14
摘要： The disclosure relates to a roller tappet for a high-pressure fuel pump. The roller tappet includes a housing that accommodates a cam contact roller next to a drive-side annular face of the housing. A bridge piece sits on an inner lateral surface of the housing, after the cam contact roller, as viewed from the drive-side annular face. An outer end face of the bridge piece has a rest for a pump piston. A separate adapter bolt protrudes from the rest beyond the output-side annular face of the housing; an end face of the adapter bolt, remote from the bridge piece, serves as a direct rest for the pump piston. An annular disc sits next to the output-side annular face of the housing, and the bore of said annular disc surrounds and retains the adapter bolt.
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公开(公告)号：US10690098B2
公开(公告)日：2020-06-23
申请号：US15740100
申请日：2016-05-13
申请人： DENSO CORPORATION
发明人： Teppei Matsumoto
摘要： In a high-pressure pump, a center of load in a virtual plane including an end face of a coil spring facing a pressurizing chamber in an axial direction is defined as an upper load center, and a center of load in a virtual plane including an end face of the coil spring facing a cam in the axial direction is defined as a lower load center. The coil spring is configured such that, when viewed in the axial direction, during motion of a plunger toward the pressurizing chamber by rotation of the cam, the upper load center moves in one direction along a circumference of the coil spring while the lower load center moves in an opposite direction along the circumference of the coil spring, and the lower load center substantially coincides with the upper load center and subsequently further moves in the opposite direction.
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公开(公告)号：US20220235750A1
公开(公告)日：2022-07-28
申请号：US17612600
申请日：2019-05-21
发明人： Peter Todman
IPC分类号： F04B9/04 , F04B1/0426 , F04B1/053
摘要： A piston type pump includes a pump housing having a pump inlet, a pump outlet, and a piston arrangement connected to a drive shaft. The drive shaft is configured to drive the piston arrangement, and the drive shaft includes a first eccentric. The piston arrangement has a first primary stage piston connected to a first sliding block guide slidably seated on the first eccentric. The first sliding block guide has a main axis, a minor axis, and an inner surface. A first sliding bush is arranged between the first eccentric and the first sliding block guide. The outer surface of the first sliding bush corresponds to the inner surface of the first sliding block guide. Translational movement of the first sliding bush relative to the first sliding block guide is allowed along the main axis and restricted along the minor axis.
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公开(公告)号：US20220065235A1
公开(公告)日：2022-03-03
申请号：US17394569
申请日：2021-08-05
申请人： Robert Bosch GmbH
IPC分类号： F04B1/0426
摘要： A plunger pump includes a plunger pump tappet assembly and a roller. The roller includes a revolving body configured to revolve along a central axis. The revolving body includes logarithmic parts and a straight part which are integrally formed. The logarithmic parts are symmetrically provided at two ends of the straight part in an axial direction of the central axis. In a cross section of the revolving body along and through the central axis, an outline of the straight part forms a straight line, and an outline of the logarithmic part forms a logarithmic curve, with an X-axis lying along the central axis, and a perpendicular bisector of the X-axis as a Y-axis.
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公开(公告)号：US11118550B2
公开(公告)日：2021-09-14
申请号：US16754644
申请日：2018-09-13
发明人： Thomas Hußenether , Norbert Geyer
IPC分类号： F02M59/10 , F04B1/0426 , F01L1/14 , F02M59/44 , F04B1/0417 , F04B1/0439
摘要： A roller tappet for a high-pressure fuel pump or for a valve drive of an internal combustion engine is provided. The tappet can be guided in a direction of a longitudinal axis thereof in a housing receptacle and can be driven displaceably by a cam shaft of the internal combustion engine. The tappet includes a tappet body which has a guide cylinder, and a cup-shaped sleeve supported axially and radially on the guide cylinder. The sleeve includes a bearing surface for the pump piston or a valve drive element, and the guide cylinder includes a rotatable roller mounted on support flanks, by means of which roller the roller tappet can be supported on the internal combustion engine camshaft. The sleeve has, at its end region facing away from the bearing surface, a ring-shaped shoulder for radial support and an end ring for axial support on the guide cylinder.
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公开(公告)号：US20230012012A1
公开(公告)日：2023-01-12
申请号：US17782450
申请日：2019-12-05
发明人： Bruno FERRONI
IPC分类号： F04B1/0426 , F04B1/07 , F03C1/04
摘要： A pump for exerting a compression action on a fluid, includes a casing for rotatably supporting a shaft having an axis; and an actuating device for actuating the fluid, including a reciprocating device movable in an axial direction. A connection device includes a driving device having a circumferential surface eccentrically extending from the axis and which is rotatable together with the shaft. A device for transmitting a driving motion of the eccentric surface to the actuation device includes a body suitable to convert the rotary motion of the eccentric driving surface into said reciprocating axial motion for the actuating device. A motor includes a drive shaft rotated by a fluid device. The fluid device including reciprocatingly movable thrust devices and a transformation device for transforming movement of the thrust devices, into a rotary motion of the drive shaft.
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公开(公告)号：US11333136B2
公开(公告)日：2022-05-17
申请号：US16197508
申请日：2018-11-21
申请人： AISIN CORPORATION
发明人： Hisashi Ono , Katsuhiko Takasu , Koji Nunami
IPC分类号： F04B9/04 , F04B1/0413 , F04B1/0426 , F04B1/0421 , F04B11/00 , F04B1/053 , F04B1/20 , F04B17/05
摘要： A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle α, α=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M−1) is N.
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公开(公告)号：US20200263645A1
公开(公告)日：2020-08-20
申请号：US16754644
申请日：2018-09-13
发明人： Thomas Hußenether , Norbert Geyer
IPC分类号： F02M59/10 , F04B1/0426
摘要： A roller tappet for a high-pressure fuel pump or for a valve drive of an internal combustion engine is provided. The tappet can be guided in a direction of a longitudinal axis thereof in a housing receptacle and can be driven displaceably by a cam shaft of the internal combustion engine. The tappet includes a tappet body which has a guide cylinder, and a cup-shaped sleeve supported axially and radially on the guide cylinder. The sleeve includes a bearing surface for the pump piston or a valve drive element, and the guide cylinder includes a rotatable roller mounted on support flanks, by means of which roller the roller tappet can be supported on the internal combustion engine camshaft. The sleeve has, at its end region facing away from the bearing surface, a ring-shaped shoulder for radial support and an end ring for axial support on the guide cylinder.
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