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公开(公告)号：US10830168B1
公开(公告)日：2020-11-10
申请号：US16388554
申请日：2019-04-18
Applicant: Caterpillar Inc.
Inventor： Christopher R. Gehrke , Travis E. Barnes , Anthony T. Petrou , David A. Pierpont
Abstract: A system may include at least one processor configured to receive a fuel signal indicative of an amount of fuel supplied to a cylinder of an internal combustion engine, receive an air signal indicative of a quantity of air supplied to the cylinder, and estimate a mean effective pressure in the cylinder based at least in part on the fuel signal and the air signal. The system may estimate an exhaust gas temperature for exhaust gas entering an exhaust manifold associated with the internal combustion engine, generate a rate of temperature change value for the exhaust manifold based at least in part on the exhaust gas temperature, generate an estimated exhaust manifold temperature based at least in part on the rate of temperature change value for the exhaust manifold, and estimate an exhaust gas temperature for exhaust gas exiting the exhaust manifold and entering a turbine of a turbocharger.
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公开(公告)号：US10787976B1
公开(公告)日：2020-09-29
申请号：US16388428
申请日：2019-04-18
Applicant: Caterpillar Inc.
Inventor： Christopher R. Gehrke , Anthony T. Petrou , David A. Pierpont
Abstract: A method for estimating a peak cylinder pressure associated with operation of an internal combustion engine may include receiving, in a cylinder combustion model, a fuel signal and an air signal. The cylinder combustion model may be configured to estimate at a first crankshaft angle, a first mass fuel burn rate and a first burned fuel-air ratio associated with combustion. The cylinder combustion model may also be configured to estimate at a second crankshaft angle, a combustion ignition delay associated with the combustion, and estimate at the second crankshaft angle, a start of combustion associated with the combustion of the fuel and the air supplied to the cylinder. The cylinder combustion model may be further configured to estimate, based at least in part on the start of combustion, a peak cylinder pressure associated with the combustion of the fuel and the air supplied to the cylinder.
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公开(公告)号：US11230992B2
公开(公告)日：2022-01-25
申请号：US16839423
申请日：2020-04-03
Applicant: Caterpillar Inc.
Inventor： Eric L. Schroeder , Christopher R. Gehrke , David A. Pierpont
Abstract: The piston has a contoured combustion bowl with a radially inner shelf portion that is spaced axially away from the radially outer lip portion a first axial distance, and a swirl pocket that extends radially from the radially inner shelf portion and defines a lower axial extremity that is spaced axially away from the radially outer lip portion a second axial distance that is greater than the first axial distance. The swirl pocket defines a tangent extending in the radially outer direction, forming an acute angle with the radially outer lip portion ranging from 70 degrees to 80 degrees.
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4.发明授权Temperature-controlled exhaust gas recirculation system and method for dual fuel engine 有权双燃料发动机温控排气再循环系统及方法公开(公告)号：US09169794B2
公开(公告)日：2015-10-27
申请号：US13709486
申请日：2012-12-10
Applicant: Caterpillar Inc.
Inventor： Christopher R. Gehrke , Martin Willi
CPC classification number: F02D41/30 , F02D19/0692 , F02D19/10 , F02D41/0025 , F02D41/0027 , F02D41/0055 , F02D41/3094 , F02D41/403 , F02D2041/0067 , F02M26/05 , F02M26/25 , F02M26/28 , F02M26/33 , F02M26/47 , Y02T10/36 , Y02T10/44 , Y02T10/47
Abstract: Systems and methods for operating an engine include controlling a temperature of recirculated exhaust gas to achieve a predetermined recirculated exhaust gas temperature. A mixture of air and temperature-controlled recirculated exhaust gas are admitted in a combustion chamber and a gaseous fuel injector delivers gaseous fuel during an intake stroke. A diesel fuel injector is activated for a first time to deliver a pre-pilot diesel quantity directly into the combustion chamber at an early stage of a compression stroke, and is activated again for a second time to deliver a pilot diesel quantity directly into the combustion chamber at a later stage of the compression stroke. A total air/fuel ratio within the combustion chamber upon completion of the second diesel fuel injector activation is lean. The air/fuel mixture is combusted during a combustion stroke, and combustion products are removed during an exhaust stroke.
Abstract translation: 用于操作发动机的系统和方法包括控制再循环废气的温度以实现预定的再循环废气温度。 空气和温度控制的再循环废气的混合物在燃烧室中进入，并且气体燃料喷射器在进气冲程期间输送气体燃料。 柴油燃料喷射器首次被激活以在压缩冲程的早期阶段将预先的先导柴油量直接输送到燃烧室中，并且再次被再次启动以将引燃柴油量直接输送到燃烧 在压缩冲程的后期阶段。 完成第二柴油喷射器启动后，燃烧室内的总空气/燃料比是稀的。 空气/燃料混合物在燃烧冲程期间燃烧，并且在排气冲程期间除去燃烧产物。
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公开(公告)号：US20200332736A1
公开(公告)日：2020-10-22
申请号：US16388554
申请日：2019-04-18
Applicant: Caterpillar Inc.
Inventor： Christopher R. Gehrke , Travis E. Barnes , Anthony T. Petrou , David A. Pierpont
Abstract: A system may include at least one processor configured to receive a fuel signal indicative of an amount of fuel supplied to a cylinder of an internal combustion engine, receive an air signal indicative of a quantity of air supplied to the cylinder, and estimate a mean effective pressure in the cylinder based at least in part on the fuel signal and the air signal. The system may estimate an exhaust gas temperature for exhaust gas entering an exhaust manifold associated with the internal combustion engine, generate a rate of temperature change value for the exhaust manifold based at least in part on the exhaust gas temperature, generate an estimated exhaust manifold temperature based at least in part on the rate of temperature change value for the exhaust manifold, and estimate an exhaust gas temperature for exhaust gas exiting the exhaust manifold and entering a turbine of a turbocharger.
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Patent Agency Ranking
公开(公告)号：US20170241368A1
公开(公告)日：2017-08-24
申请号：US15046667
申请日：2016-02-18
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Christopher R. Gehrke , Yongli Qi
CPC classification number: F02D41/403 , F02B23/00 , F02B23/0651 , F02B23/0669 , F02D41/405 , F02D2041/389 , Y02T10/125 , Y02T10/44
Abstract: A ducted combustion system for an internal combustion. The ducted combustion system includes a combustion chamber, a fuel injector in fluid communication with the combustion chamber and configured to inject a sequence of at least two fuel charges into a combustion chamber during a combustion cycle and one or more ducts disposed within the combustion chamber and configured to receive at least a part of the fuel charges.
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公开(公告)号：US20200332729A1
公开(公告)日：2020-10-22
申请号：US16388428
申请日：2019-04-18
Applicant: Caterpillar Inc.
Inventor： Christopher R. Gehrke , Anthony T. Petrou , David A. Pierpont
Abstract: A method for estimating a peak cylinder pressure associated with operation of an internal combustion engine may include receiving, in a cylinder combustion model, a fuel signal and an air signal. The cylinder combustion model may be configured to estimate at a first crankshaft angle, a first mass fuel burn rate and a first burned fuel-air ratio associated with combustion. The cylinder combustion model may also be configured to estimate at a second crankshaft angle, a combustion ignition delay associated with the combustion, and estimate at the second crankshaft angle, a start of combustion associated with the combustion of the fuel and the air supplied to the cylinder. The cylinder combustion model may be further configured to estimate, based at least in part on the start of combustion, a peak cylinder pressure associated with the combustion of the fuel and the air supplied to the cylinder.
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公开(公告)号：US11920528B1
公开(公告)日：2024-03-05
申请号：US18198408
申请日：2023-05-17
Applicant: Caterpillar Inc.
Inventor： Michael T. Graziano, Jr. , Eric L. Schroeder , Christopher R. Gehrke , Jaswinder Singh , Patrick J. Seiler , Andrew J. Neaville , Geetika Dilawari , Zachary S. Engstrom
CPC classification number: F02D41/0027 , F02B43/12 , F02D41/38 , F02D2041/389 , F02D2200/024
Abstract: Operating a gaseous fuel engine system includes detecting preignition in one or more of a plurality of cylinders based on a monitored cylinder pressure during combustion of a gaseous fuel such as a gaseous hydrogen fuel. Operating a gaseous fuel engine system also includes reducing a fuel injection amount for the one or more of the plurality of cylinders to a derated fuel injection amount that is based on a timing of the detected preignition. Fuel injection amount may be reduced to a greater relative extent if detected preignition is early, and to a lesser relative extent if detected preignition is later, in an engine cycle. Related apparatus and control logic is also disclosed.
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公开(公告)号：US20210310438A1
公开(公告)日：2021-10-07
申请号：US16839423
申请日：2020-04-03
Applicant: Caterpillar Inc.
Inventor： Eric L. Schroeder , Christopher R. Gehrke , David A. Pierpont
Abstract: The piston has a contoured combustion bowl with a radially inner shelf portion that is spaced axially away from the radially outer lip portion a first axial distance, and a swirl pocket that extends radially from the radially inner shelf portion and defines a lower axial extremity that is spaced axially away from the radially outer lip portion a second axial distance that is greater than the first axial distance. The swirl pocket defines a tangent extending in the radially outer direction, forming an acute angle with the radially outer lip portion ranging from 70 degrees to 80 degrees.
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公开(公告)号：US10982608B2
公开(公告)日：2021-04-20
申请号：US16388686
申请日：2019-04-18
Applicant: Caterpillar Inc.
Inventor： Christopher R. Gehrke , Anthony T. Petrou , David A. Pierpont
Abstract: A system for estimating engine performance is configured to receive, via a cylinder combustion model, a cylinder pressure of a cylinder associated with operation of an internal combustion engine. The system estimates a liner bending moment based at least in part on the cylinder pressure, generates a piston side load associated with the cylinder based at least in part on the liner bending moment, and estimates a piston friction value for a piston associated with the cylinder. The piston friction value may be based at least in part on the cylinder pressure and an engine speed of the internal combustion engine. The system receives, via a convective heat transfer model, an exhaust heat transfer value indicative of a cumulative heat transfer from an exhaust manifold, and estimates an engine torque value based at least in part on the exhaust heat transfer value.
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