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公开(公告)号：US11506162B2
公开(公告)日：2022-11-22
申请号：US16950026
申请日：2020-11-17
Applicant: Caterpillar Inc.
Inventor： Cory Andrew Brown , Sana Mahmood , Dana Ray Coldren , Glenn Brian Cox , Matthew Robert Vanderveen
Abstract: A fuel system includes a fuel injector having a split check assembly with a control piece, an outlet piece, and a check sleeve. A trapped volume is formed between the control piece and the outlet piece within the check sleeve, to hydraulically couple the control piece to the outlet piece. A starting rate shape clearance fluidly connects the trapped volume to a fuel cavity and is formed between the check sleeve and one of the control piece or outlet piece received therein, and modulates a starting rate shape of fuel injection from the fuel injector. Related methodology is disclosed.
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公开(公告)号：US11225933B2
公开(公告)日：2022-01-18
申请号：US16041061
申请日：2018-07-20
Applicant: Caterpillar Inc.
Inventor： Robert M. Campion , Dean Craig Diers , Sana Mahmood , Jonathan Anders , Bobby John , Jonathan Richard Chittenden
Abstract: A liquid fuel injector such as for a dual fuel system in an internal combustion engine includes two-way injection control valves for controlling twin outlet checks. A first set of orifices are arranged in an A-F-Z pattern, and a second set of orifices are arranged in an A-F-Z pattern, within the fuel injector, among a high-pressure inlet passage, a low-pressure space, and first and second outlet check control chambers, respectively. A common nozzle supply cavity is fluidly connected to the high-pressure inlet passage and supplies each of two sets of nozzle outlets opened and closed by the twin outlet checks.
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公开(公告)号：US11035332B2
公开(公告)日：2021-06-15
申请号：US15847301
申请日：2017-12-19
Applicant: CATERPILLAR INC.
Inventor： Sana Mahmood , Robert M. Campion , Lifeng Wang
Abstract: A fuel injector is disclosed. The fuel injector may have an injector body having a fuel inlet and at least one orifice. The fuel injector may also have a first check valve member. The first check valve member may be selectively movable to fluidly block a first flow of fuel from the fuel inlet to the at least one orifice. The fuel injector may have a second check valve member. The second check valve member may be selectively movable to fluidly block a second flow of fuel from the fuel inlet to the at least one orifice. The fuel injector may also have a control valve assembly. The control valve assembly may be configured to selectively operate either the first check valve or both the first check valve and the second check valve to fluidly connect the fuel inlet and the at least one orifice.
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公开(公告)号：US11008957B2
公开(公告)日：2021-05-18
申请号：US16432537
申请日：2019-06-05
Applicant: Caterpillar Inc.
Inventor： Dana Coldren , Sana Mahmood
Abstract: A fuel system for an internal combustion engine includes a nozzle, a fuel pump, a spill valve assembly, and a pumping control unit. The spill valve assembly includes a first spill valve and a second spill valve fluidly in parallel between a plunger cavity in the fuel pump and a low pressure space. A pumping control unit commands closing of the first spill valve and then the second spill valve to adjust the spill valve assembly to start pressurization in the fuel pump, and commands opening the first spill valve to end pressurization in the fuel pump. A pumping duration is determined based on a timing of the commanded closing of the second spill valve and a timing of the commanded opening of the first spill valve.
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公开(公告)号：US20200025154A1
公开(公告)日：2020-01-23
申请号：US16041061
申请日：2018-07-20
Applicant: Caterpillar Inc.
Inventor： Robert M. Campion , Dean Craig Diers , Sana Mahmood , Jonathan Anders , Bobby John , Jonathan Richard Chittenden
Abstract: A liquid fuel injector such as for a dual fuel system in an internal combustion engine includes two-way injection control valves for controlling twin outlet checks. A first set of orifices are arranged in an A-F-Z pattern, and a second set of orifices are arranged in an A-F-Z pattern, within the fuel injector, among a high-pressure inlet passage, a low-pressure space, and first and second outlet check control chambers, respectively. A common nozzle supply cavity is fluidly connected to the high-pressure inlet passage and supplies each of two sets of nozzle outlets opened and closed by the twin outlet checks.
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Patent Agency Ranking
公开(公告)号：US10036383B2
公开(公告)日：2018-07-31
申请号：US14681006
申请日：2015-04-07
Applicant: Caterpillar Inc.
Inventor： Alan Ray Stockner , Sana Mahmood , Joshua Steffen , Dana Ray Coldren
CPC classification number: F04B53/14 , F04B53/008 , F04B2015/081
Abstract: A pump piston is disclosed. The pump piston may include a body having an actuating end, a pressurizing end opposite the actuating end, and an outer diameter that is greater at the pressurizing end than at the actuating end, wherein the outer diameter varies between the pressurizing end and the actuating end without increasing to form an outer diameter profile.
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公开(公告)号：US10006449B2
公开(公告)日：2018-06-26
申请号：US14597019
申请日：2015-01-14
Applicant: Caterpillar Inc.
Inventor： Bryan E. Nelson , Daniel R. Baldwin , Alan R. Stockner , Robert M. Campion , Cory A. Brown , Joshua W. Steffen , Dana R. Coldren , Sana Mahmood
CPC classification number: F04B27/1054 , F04B27/1063 , F04B37/08 , F16C19/06 , F16C19/30 , F16C19/547 , F16C23/086 , F16C2360/00
Abstract: A bearing arrangement for a wobble plate piston pump includes first, second, third, and fourth bearing assemblies. The first and second bearing assemblies support the drive shaft portion for rotation within the housing about the central longitudinal axis, while the third and fourth bearing assemblies support the load plate for rotation relative to the offset shaft portion of the shaft. The second bearing assembly is distally disposed from the first, the third disposed distally to second, and the fourth disposed distally to third. The fourth bearing assembly is the most distally disposed bearing assembly along the shaft.
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公开(公告)号：US09470197B2
公开(公告)日：2016-10-18
申请号：US13725678
申请日：2012-12-21
Applicant: Caterpillar Inc.
Inventor： Bryan D. Moore , Sana Mahmood , Daniel R. Ibrahim
CPC classification number: F02M61/1886 , F02M61/18 , F02M61/1846
Abstract: A nozzle for a fuel injector is disclosed. The nozzle may have an internal axial nozzle bore. The nozzle may also have at least one orifice passing from the nozzle bore radially outward through a wall of the nozzle at a tip end. Further, the nozzle may have a sac volume formed in the tip end and defined by a bore radius and a tip radius. The bore radius may be generally perpendicular to the central bore. The tip radius may be generally parallel to the central bore. The tip radius may be less than the bore radius.
Abstract translation: 公开了一种用于燃料喷射器的喷嘴。 喷嘴可以具有内部轴向喷嘴孔。 喷嘴还可以具有至少一个孔，其从喷嘴孔径向向外通过喷嘴的壁在尖端处。 此外，喷嘴可以具有形成在尖端中并由孔半径和尖端半径限定的囊容积。 孔径可以大致垂直于中心孔。 尖端半径可以大致平行于中心孔。 尖端半径可能小于孔半径。
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公开(公告)号：US11840993B1
公开(公告)日：2023-12-12
申请号：US18104369
申请日：2023-02-01
Applicant: Caterpillar Inc.
Inventor： Cory A. Brown , Sana Mahmood , Glenn B. Cox , Zhenyu Li
CPC classification number: F02M47/027 , F02M53/043 , F02M63/0022 , F02M63/0033 , F02M63/0054 , F02M63/0077 , F02M55/002 , F02M55/008 , F02M55/025
Abstract: A fuel injector assembly for a fuel-actuated fuel injector includes an injector body, and an injection control valve assembly. The injector body includes therein a low-pressure fuel passage extending from a clamping face to an armature cavity to convey spent actuating fuel to the armature cavity. The fuel injector assembly also includes a flushing drain formed by the injector body and fluidly connected to at least one of a valve pin bore in the injector body or the armature cavity. The flushing drain forms, together with the low-pressure fuel passage and the armature cavity, a cooling circuit for the spent actuating fuel. The flushing drain extends to a drain opening formed in an outer body surface of the injector body. Related methodology is also disclosed.
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公开(公告)号：US11506163B2
公开(公告)日：2022-11-22
申请号：US17121352
申请日：2020-12-14
Applicant: Caterpillar Inc.
Inventor： Sana Mahmood , Glenn Brian Cox , Dana Ray Coldren
Abstract: A fuel injector nozzle assembly includes a two-piece outlet check having a timing control piece and a rate control piece. A nozzle passage is formed between a nozzle body and a two-piece outlet check, and a sac cavity is formed by the rate control piece and the nozzle body and fluidly connects a through-hole in the rate control piece to nozzle outlets. A starting-flow clearance is formed by the rate control piece and the timing control piece, and is opened by moving the timing control piece relative to the rate control piece. Moving the rate control piece relative to the nozzle body opens a main-flow seat. The nozzle assembly provides a slow starting injection rate shape in a common rail or similar fuel system and improved controllability over minimum delivery quantities.
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