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公开(公告)号：US11300068B1
公开(公告)日：2022-04-12
申请号：US17228848
申请日：2021-04-13
Applicant: Caterpillar Inc.
Inventor： Adam Charles Hill , Zhenyu Li
Abstract: A fuel system for an internal combustion engine includes a fuel injector, and a fueling control unit electrically connected to a solenoid in the fuel injector. The fueling control unit energizes the solenoid with a lift current pulse to lift an armature, then energizes the solenoid with a separate capture current pulse to capture the armature at a lifted position. The solenoid is deenergized a dwell time while the armature is in flight toward the lifted position. Armature lifting speed is retarded based on the deenergizing of the solenoid so as to limit bouncing of a valve pin in the fuel injector against a stop. The techniques assist in linearizing a fuel delivery curve.
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公开(公告)号：US09976527B1
公开(公告)日：2018-05-22
申请号：US15405925
申请日：2017-01-13
Applicant: Caterpillar Inc.
Inventor： Robert Campion , George Kodikulam Joseph , Satya Naga Deepak Pillarisetti , Zhenyu Li
CPC classification number: F02M53/043 , F02M55/004 , F02M55/008 , F02M55/025 , F02M57/023 , F02M61/14
Abstract: A fuel injector assembly for an engine system includes a fuel pressurization mechanism, a fuel injector, and a flow-directing sleeve positioned about the fuel injector and including sealing surfaces for sealing with a cylinder head and with an injector body. Slots are formed at least in part in the sealing surfaces to direct fuel from the cylinder head into an incoming cooling passage extending to the fuel pressurization mechanism, and from an outgoing cooling fuel passage into the cylinder head.
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3.发明授权公开(公告)号：US11708810B1
公开(公告)日：2023-07-25
申请号：US17745970
申请日：2022-05-17
Applicant: Caterpillar Inc.
Inventor： Manjunath Bannur Nagaraja , Zhenyu Li , Benjamin R Tower , Aniket Suresh Dighe
CPC classification number: F02M53/043 , F02M37/0017 , F02M37/0052 , F02M47/027 , F02M55/02 , F02M2700/077
Abstract: An engine head assembly includes a double-walled fuel connector assembly in an engine head and forming a high-pressure fuel supply passage and a low-pressure fuel return passage. The engine head assembly also includes a fuel injector. A high-pressure fuel inlet path extends between a fuel inlet and spray orifices through an injector body in the fuel injector. A low-pressure cooling fuel outlet path extends between an injection control valve seat in the fuel injector and a cooling fuel outlet in a nozzle case of the fuel injector. Expelled cooling fuel is passed through the low-pressure fuel return passage in the double-walled fuel connector.
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Patent Agency Ranking
公开(公告)号：US20180306150A1
公开(公告)日：2018-10-25
申请号：US15642300
申请日：2017-07-05
Applicant: Caterpillar Inc.
Inventor： Adam Stecklein , Joshua Carlson , Derik Warne , Rajesh Paranjape , Daniel Ibrahim , Glenn Cox , Zhenyu Li , Ryan Hinrichsen
Abstract: A liquid pump applicable in a fuel system such as a common rail fuel system includes a valve assembly having a valve stack with axially aligned components, dead volume, and vapor-distributing flow channels, for cavitation mitigation. An inlet valve meters a flow of liquid into the pump for pressurization by a plurality of reciprocating plungers operated by way of a rotating camshaft.
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公开(公告)号：US10557446B2
公开(公告)日：2020-02-11
申请号：US15642300
申请日：2017-07-05
Applicant: Caterpillar Inc.
Inventor： Adam Stecklein , Joshua Carlson , Derik Warne , Rajesh Paranjape , Daniel Ibrahim , Glenn Cox , Zhenyu Li , Ryan Hinrichsen
Abstract: A liquid pump applicable in a fuel system such as a common rail fuel system includes a valve assembly having a valve stack with axially aligned components, dead volume, and vapor-distributing flow channels, for cavitation mitigation. An inlet valve meters a flow of liquid into the pump for pressurization by a plurality of reciprocating plungers operated by way of a rotating camshaft.
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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：US10544769B2
公开(公告)日：2020-01-28
申请号：US15726950
申请日：2017-10-06
Applicant: Caterpillar Inc.
Inventor： Aaron M. Brown , Cory A. Brown , Sridhar Thangaswamy , Alan R. Stockner , Victor I. Yacoub , Zhenyu Li , Lifeng Wang , Satya Naga Deepak Pillarisetti , Scott Shafer , Robert Michael Campion , George Kodikulam Joseph
Abstract: A fuel system is disclosed for use with an engine, including a fuel injector assembly fluidly coupled with a low-pressure fuel conduit, an accumulator, and a cap within an opening in the accumulator. The fuel injector assembly may be structured to draw in low-pressure fuel, pressurize the fuel, and store the pressurized fuel in the accumulator for injection to a combustion chamber. The cap has a pressure sensor and a pressure relief valve therein, and drains fuel leaked past fluid seals between the cap and each of the pressure sensor, the pressure relief valve, and the accumulator by way of a common drain line.
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公开(公告)号：US20180100476A1
公开(公告)日：2018-04-12
申请号：US15726950
申请日：2017-10-06
Applicant: Caterpillar Inc.
Inventor： Aaron M. Brown , Cory A. Brown , Sridhar Thangaswamy , Alan R. Stockner , Victor I. Yacoub , Zhenyu Li , Lifeng Wang , Satya Naga Deepak Pillarisetti , Scott Shafer , Robert Michael Campion , George Kodikulam Joseph
CPC classification number: F02M57/027 , F02D41/0082 , F02D41/3094 , F02D41/3863 , F02D2041/3881 , F02D2200/0602 , F02F7/006 , F02M39/02 , F02M47/027 , F02M55/002 , F02M55/004 , F02M55/005 , F02M55/025 , F02M57/005 , F02M57/023 , F02M59/022 , F02M63/005 , F02M63/0225 , F02M63/0265 , F02M2200/16 , F02M2200/247
Abstract: A fuel system is disclosed for use with an engine, including a fuel injector assembly fluidly coupled with a low-pressure fuel conduit, an accumulator, and a cap within an opening in the accumulator. The fuel injector assembly may be structured to draw in low-pressure fuel, pressurize the fuel, and store the pressurized fuel in the accumulator for injection to a combustion chamber. The cap has a pressure sensor and a pressure relief valve therein, and drains fuel leaked past fluid seals between the cap and each of the pressure sensor, the pressure relief valve, and the accumulator by way of a common drain line.
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