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11.发明申请Dual Fuel Common Rail Depressurization During Engine Shutdown And Machine Using Same 有权发动机关闭期间的双燃料共轨减压和使用相同的机器公开(公告)号：US20140316677A1
公开(公告)日：2014-10-23
申请号：US13866110
申请日：2013-04-19
Applicant: Caterpillar, Inc.
Inventor： Alan R. Stockner , Nandagopal Methil , Daniel Puckett
IPC: F02D41/00
CPC classification number: F02D41/0025 , F02D19/0605 , F02D19/061 , F02D19/0694 , F02D19/10 , F02D41/0027 , F02D41/008 , F02D41/042 , F02D41/3094 , F02D41/3863 , F02D41/401 , F02D2200/0602 , F02M43/00 , F02M55/002 , F02M55/02 , F02M63/026 , F02M63/0295 , Y02T10/36
Abstract: A machine includes a compression ignition engine fueled from common rail fuel injectors that predominately inject natural gas fuel that is compression ignited with a small pilot injection of liquid diesel fuel. When an engine shutdown command is communicated to an electronic controller, the supply of gaseous fuel to the gas rail is stopped and the gaseous fuel common rail is depressurized by continuing to run the engine and inject gaseous and liquid fuels while commanding a liquid pressure greater than the gas pressure. After the gas rail pressure has achieved an acceptable shutdown pressure, the engine is stopped. The gas rail pressure is then reduced to atmospheric pressure followed by the liquid fuel common rail being reduced to atmosphere pressure after stopping the engine.
Abstract translation: 一种机器包括由共轨燃料喷射器燃料的压燃式发动机，其主要是喷射天然气燃料，该天然气燃料通过小型先导式液体柴油燃料喷射而被压缩点燃。 当发动机关闭指令传送到电子控制器时，停止向气轨供应气体燃料，并通过继续运行发动机并喷射气体和液体燃料同时控制气体燃料共轨的液压大于 气压。 在气轨压力达到可接受的停机压力之后，发动机停止。 然后将气轨压力降低到大气压力，随后液体燃料共轨在停止发动机后减小到大气压力。
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公开(公告)号：US20140182552A1
公开(公告)日：2014-07-03
申请号：US13732673
申请日：2013-01-02
Applicant: CATERPILLAR INC.
Inventor： Cory A. Brown , Joshua W. Steffen , Dana R. Coldren , Alan R. Stockner , Hoisan Kim , Dianqi Fang
IPC: F02M69/50
Abstract: A dual fuel common rail system may be operated in a regular mode in which a relatively large charge of gaseous fuel is ignited by compression igniting a relatively small injection quantity of liquid diesel fuel. The dual fuel system may be operated in a single fuel limp home mode in which liquid diesel fuel is injected at higher pressures. Over pressurization of the gaseous fuel side of the fuel system due to leaked liquid fuel is avoided by regularly injecting leaked liquid fuel, but not gaseous fuel, from the gaseous nozzle outlet set during the limp home mode of operation.
Abstract translation: 双燃料共轨系统可以以常规模式操作，其中相对较大量的气体燃料通过压缩点燃，点燃相对较小量的液体柴油燃料。 双燃料系统可以在单一燃料跛行家庭模式中操作，其中液体柴油燃料在较高压力下喷射。 由于泄漏的液体燃料，燃料系统的气体燃料侧的过度加压通过在跛行家庭操作模式期间从设置的气体喷嘴出口定期注入泄漏的液体燃料而不是气体燃料来避免。
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公开(公告)号：US10851753B2
公开(公告)日：2020-12-01
申请号：US15335066
申请日：2016-10-26
Applicant: Caterpillar Inc.
Inventor： Graeme Mawhinney , Alan R. Stockner , Paul Stark , David Mack
Abstract: A fuel injector is provided which has a valve member, a valve member guide and a spring chamber. Discharge of fuel out of a fuel injector outlet is controlled by movement of the valve member within a bore of the valve member guide. The spring chamber contains a biasing member, which is a compression spring, and which biases the valve member into contact with a valve seat when in a closed configuration. The fuel supply passage is provided, which by-passes the spring chamber, to direct a flow of the fuel to an outlet chamber of the fuel injector, and the cleaning fluid supply passage is provided to supply a pressurized cleaning fluid to a second end of the bore to restrict leakage of the fuel from the outlet chamber towards the second end of the bore along a clearance extending between the valve member and the valve member guide.
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公开(公告)号：US10519877B2
公开(公告)日：2019-12-31
申请号：US15355270
申请日：2016-11-18
Applicant: Caterpillar Inc.
Inventor： Alan R. Stockner , Thomas J. Crowell , Scott F. Shafer
IPC: F02D19/06 , F02D33/00 , F02D41/00 , F02B43/10 , F02D41/14 , F02D41/22 , F02D29/02 , F02D35/02 , F02D19/10
Abstract: A control system for a dual fuel engine having a liquid fuel supply and a gaseous fuel supply is disclosed. The control system may include at least one sensor operably coupled to a cylinder of the dual fuel engine and configured to monitor cylinder condition and transmit a cylinder condition signal. Additionally, a controller may be communicably coupled with the at least one sensor and the controller may be configured to receive the cylinder condition signal and determine whether the cylinder is operating in an abnormal operating condition. Whereas the controller determines the cylinder is operating in the abnormal operating condition, the controller sends a control signal for the liquid fuel supply to provide an amount of liquid fuel which is greater than an amount of liquid fuel supplied to the cylinder during a normal operating condition.
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公开(公告)号：US10316839B2
公开(公告)日：2019-06-11
申请号：US15378240
申请日：2016-12-14
Applicant: Caterpillar Inc.
Inventor： Aaron M. Brown , Alan R. Stockner
Abstract: A pump plunger is disclosed. The plunger may include a proximal end and a distal end opposite the proximal end. The plunger may also include a body portion extending between the proximal end and a second transition datum, and additionally include a transition section extending between a first transition datum and the second transition datum. The transition section may have a non-linear geometric profile. A first shoulder portion may be positioned adjacent to the transition section that may extend between the second transition datum and a third datum. The third datum may be positioned radially inward of the second transition datum. The plunger may also include a tip portion positioned adjacent to the first shoulder portion that may extend between the third datum and a fourth datum positioned at the distal end. The fourth datum may be positioned radially inward of the third datum.
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Patent Agency Ranking
公开(公告)号：US10184462B2
公开(公告)日：2019-01-22
申请号：US14934593
申请日：2015-11-06
Applicant: Caterpillar Inc.
Inventor： Alan R. Stockner
Abstract: A cryogenic pump for pumping cryogenic fluid is provided. The pump includes a pump assembly adapted for exposure to cryogenic fluid that includes a plurality of pumping elements disposed about a pump axis. A drive assembly drives the pumping elements to pump cryogenic fluid. A plurality of actuating elements are arranged circumferentially about the pump axis, each actuating element operatively interconnecting the drive assembly with a respective one of the pumping elements. Each actuating element includes a first portion disposed a first radial distance from the pump axis and a second portion disposed a second radial distance from the pump axis with the first radial distance being less than the second radial distance at ambient temperature.
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公开(公告)号：US09989048B2
公开(公告)日：2018-06-05
申请号：US14809861
申请日：2015-07-27
Applicant: Caterpillar Inc.
Inventor： Sunil J. Bean , Alan R. Stockner , Joshua W. Steffen , Cory A. Brown
CPC classification number: F04B49/002 , F04B1/128 , F04B1/146 , F04B1/28 , F04B9/107 , F04B15/08 , F04B49/065 , F04B51/00 , F04B53/14 , G01L23/26
Abstract: A method for controlling a stroke velocity in a pump includes using a sensor to detect a start of a pump stroke and an end of the pump stroke. A stroke time is calculated, the stroke time being a time period between the start of the pump stroke and the end of the pump stroke. The stroke velocity is calculated based on a stroke length and the stroke time. The stroke velocity is compared to a reference stroke velocity. A hydraulic supply pressure to the pump is increased if the calculated stroke velocity is less than the reference stroke velocity, and the hydraulic supply pressure is decreased if the calculated stroke velocity is more than the reference stroke velocity.
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公开(公告)号：US20180142629A1
公开(公告)日：2018-05-24
申请号：US15355270
申请日：2016-11-18
Applicant: Caterpillar Inc.
Inventor： Alan R. Stockner , Thomas J. Crowell , Scott F. Shafer
Abstract: A control system for a dual fuel engine having a liquid fuel supply and a gaseous fuel supply is disclosed. The control system may include at least one sensor operably coupled to a cylinder of the dual fuel engine and configured to monitor cylinder condition and transmit a cylinder condition signal. Additionally, a controller may be communicably coupled with the at least one sensor and the controller may be configured to receive the cylinder condition signal and determine whether the cylinder is operating in an abnormal operating condition. Whereas the controller determines the cylinder is operating in the abnormal operating condition, the controller sends a control signal for the liquid fuel supply to provide an amount of liquid fuel which is greater than an amount of liquid fuel supplied to the cylinder during a normal operating condition.
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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：US10519940B2
公开(公告)日：2019-12-31
申请号：US15490947
申请日：2017-04-19
Applicant: Caterpillar Inc.
Inventor： Aaron M. Brown , Alan R. Stockner
Abstract: A linearly actuated hydraulic piston pump is provided. The pump includes a piston disposed between a first section and a second section of a piston chamber. The pump also includes a control valve having a valve body defining a valve chamber therein. The control valve also includes an inlet port, a first port, a regeneration port, a second port, and a spool. The spool in a first spool position fluidly couples a pressurized fluid source to the first section via the inlet port and the first port, and fluidly couples an accumulator to the second section via the regeneration port and the second port. The spool in the second spool position fluidly couples the first section to a drain via the first port and a drain port, and fluidly couples the second section to the pressurized fluid source via the inlet port and the second port.
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