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公开(公告)号：US11384721B1
公开(公告)日：2022-07-12
申请号：US17167211
申请日：2021-02-04
Applicant: Caterpillar Inc.
Inventor： Eric Lee Schroeder , David Todd Montgomery , Dana Ray Coldren , Chad Koci
Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.
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公开(公告)号：US20160102617A1
公开(公告)日：2016-04-14
申请号：US14511918
申请日：2014-10-10
Applicant: Caterpillar Inc.
Inventor： Dana Ray Coldren , Joshua Wayne Steffen , Robert Michael Campion
CPC classification number: F02D19/0628 , B61C5/00 , B61C17/02 , F02D19/061 , F02D19/0642 , F02D19/0697 , F02D19/10 , F02D41/0025 , F02D41/0027 , F02D41/3017 , F02D41/3035 , F02D41/3076 , F02D2200/0602 , F02D2200/0606 , F02M43/00 , F02M2200/247 , F02M2200/248 , F02M2200/95 , Y02T10/36
Abstract: A fuel system is disclosed that is capable of operating in multiple combustion modes. A method is also disclosed of operating a dual fuel engine in conjunction with the fuel system. The method may include detecting a performance parameter of gaseous fuel in the fuel system. The method may also include selecting a combustion mode from a plurality of combustion modes based on the performance parameter. The method may further include injecting gaseous fuel and liquid fuel into at least one cylinder of the engine according to an injection timing corresponding to the selected combustion mode.
Abstract translation: 公开了能够以多种燃烧模式操作的燃料系统。 还公开了一种与燃料系统一起操作双燃料发动机的方法。 该方法可以包括检测燃料系统中气体燃料的性能参数。 该方法还可以包括基于性能参数从多个燃烧模式中选择燃烧模式。 该方法可以进一步包括根据对应于所选择的燃烧模式的喷射定时将气体燃料和液体燃料喷射到发动机的至少一个气缸中。
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公开(公告)号：US20240141857A1
公开(公告)日：2024-05-02
申请号：US18049719
申请日：2022-10-26
Applicant: Caterpillar Inc.
Inventor： Hoisan Kim , Arnold Myoungjin Kim , Dana Ray Coldren , Eric Lee Schroeder
CPC classification number: F02M55/025 , F02D19/0613 , F02D19/0694
Abstract: An internal combustion engine system is described herein. The system uses a switching rail in combination with a first fuel rail to operate the internal combustion engine of the system. The first fuel rail receives the first fuel for combustion within one or more of the combustion cylinders of the internal combustion engine. The switching rails are configured to receive either the first fuel or a second fuel. A controller is used to operate a switching valve that, depending on the position of the switching valve, routes or directs either the second fuel or the first fuel from their respective fuel tanks. In a switching condition, such as startup, shutdown, or when the second fuel is not available, the controller can use the first fuel as the alternate source of fuel provided through the switching rail.
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Patent Agency Ranking
公开(公告)号：US20220186697A1
公开(公告)日：2022-06-16
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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公开(公告)号：US20220154673A1
公开(公告)日：2022-05-19
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：US09926922B2
公开(公告)日：2018-03-27
申请号：US14610921
申请日：2015-01-30
Applicant: Caterpillar Inc.
CPC classification number: F04B39/10 , F02M43/02 , F04B1/143 , F04B1/16 , F04B15/08 , F04B53/14 , F04B53/16 , F04B2015/081 , Y02T10/32
Abstract: A barrel assembly for a pumping mechanism includes a first end, a second end opposite the first end, and a plunger bore configured to receive a plunger for sliding within the plunger bore. The barrel assembly also includes at least one inlet passage including at least one inlet extending through the first end and fluidly connected to the plunger bore to communicate fluid from the at least one inlet passage to the plunger bore. The barrel assembly further includes an outlet passage fluidly connected to the plunger bore and configured to receive fluid from the plunger bore, the plunger bore and the outlet passage forming separate openings in the second end of the barrel assembly.
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公开(公告)号：US09695758B2
公开(公告)日：2017-07-04
申请号：US14511918
申请日：2014-10-10
Applicant: Caterpillar Inc.
Inventor： Dana Ray Coldren , Joshua Wayne Steffen , Robert Michael Campion
CPC classification number: F02D19/0628 , B61C5/00 , B61C17/02 , F02D19/061 , F02D19/0642 , F02D19/0697 , F02D19/10 , F02D41/0025 , F02D41/0027 , F02D41/3017 , F02D41/3035 , F02D41/3076 , F02D2200/0602 , F02D2200/0606 , F02M43/00 , F02M2200/247 , F02M2200/248 , F02M2200/95 , Y02T10/36
Abstract: A fuel system is disclosed that is capable of operating in multiple combustion modes. A method is also disclosed of operating a dual fuel engine in conjunction with the fuel system. The method may include detecting a performance parameter of gaseous fuel in the fuel system. The method may also include selecting a combustion mode from a plurality of combustion modes based on the performance parameter. The method may further include injecting gaseous fuel and liquid fuel into at least one cylinder of the engine according to an injection timing corresponding to the selected combustion mode.
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公开(公告)号：US20140174404A1
公开(公告)日：2014-06-26
申请号：US13724544
申请日：2012-12-21
Applicant: CATERPILLAR INC.
Inventor： Dana Ray Coldren
IPC: F02D19/06
CPC classification number: F02D19/0673 , F01N3/0253 , F01N3/035 , F01N3/106 , F01N3/36 , F01N2610/03 , F01N2610/06 , F01N2610/10 , F01N2900/1808 , F02D19/0605 , F02D19/0628 , F02D19/0647 , F02M21/0224 , F02M21/0287 , Y02T10/32 , Y02T10/36
Abstract: A fuel system for a dual fuel power source includes a first fuel circuit fluidly connected to the power source, a second fuel circuit separate from the first fuel circuit and fluidly connected to the power source, and a pressure regulator fluidly connected to the first fuel circuit. The pressure regulator is configured to vent a first fuel from the first fuel circuit to an aftertreatment system fluidly connected to the power source in response to a pressure difference between the first and second fuel circuits being less than or equal to a pressure difference threshold.
Abstract translation: 一种用于双燃料电源的燃料系统包括流体地连接到电源的第一燃料电路，与第一燃料电路分离并且流体连接到电源的第二燃料电路和流体连接到第一燃料电路的压力调节器 。 压力调节器构造成响应于第一和第二燃料回路之间的压力差小于或等于压力差阈值，将第一燃料从第一燃料回路排放到流体连接到电源的后处理系统。
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