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公开(公告)号：US20190040804A1
公开(公告)日：2019-02-07
申请号：US15665842
申请日：2017-08-01
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Engfehr , Hua Xu
Abstract: A dual fuel engine system, such as for diesel and natural gas operation, includes a control system having an electronic control unit structured to vary a stored control valve for a fuel delivery parameter, responsive to engine power output. The engine power output can be determined by in-cylinder pressure monitoring during a liquid fuel mode. The stored control value can be a dynamically updated value in an engine fueling map.
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公开(公告)号：US20180223745A1
公开(公告)日：2018-08-09
申请号：US15423905
申请日：2017-02-03
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
CPC classification number: F02D19/081 , F02D19/0647 , F02D41/0025 , F02D41/0027 , F02D41/0082 , F02D41/0087 , F02D2250/21 , Y02T10/36
Abstract: An engine control system includes a dual fuel internal combustion engine, a fuel system including a liquid fuel source and a gaseous fuel source, and a controller. The engine control system further includes a liquid fuel control module and at least one gaseous fuel control module associated with a first and second subset of cylinders, each communicatively connected over a network. The controller has an operating mode and a cylinder deactivation mode. The controller in the operating mode is configured to instruct the liquid fuel control module and the at least one gaseous fuel control module to operate the plurality of cylinders in a dual fuel mode. The controller in the cylinder deactivation mode transitions the plurality of cylinders to a liquid-fuel only mode over a phase out period, deactivates the first subset of cylinders, and then transitions to the dual fuel mode in the second subset of cylinders.
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公开(公告)号：US10323586B1
公开(公告)日：2019-06-18
申请号：US15848204
申请日：2017-12-20
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
CPC classification number: F02D41/0027 , F02D35/023 , F02D41/222 , F02D41/26 , F02D2041/224
Abstract: A dual fuel engine control system includes a pressure sensor, and an electronic control unit coupled with the pressure sensor and structured to receive cylinder pressure data indicative of cylinder over-pressurization, and to switch the system to a limited gas-to-liquid substitution mode based on the cylinder pressure data indicative of cylinder over-pressurization. The electronic control unit is further structured to return the system to a normal gas-to-liquid substitution mode, receive cylinder pressure data indicative of cylinder over-pressurization after returning the system to the normal gas-to-liquid substitution mode, and responsively output a gas substitution fault signal.
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公开(公告)号：US20160201627A1
公开(公告)日：2016-07-14
申请号：US14593472
申请日：2015-01-09
Applicant: Caterpillar Inc.
Inventor： Michael Gough , Ryan Snodgrass , Nathan Atterberry
IPC: F02M43/04
CPC classification number: F02M43/04 , F02D19/0678 , F02D19/105 , F02M21/0239 , F02M43/00 , Y02T10/32 , Y02T10/36
Abstract: The disclosure relates to a system and method for sizing of system components in a dual fuel port injection system. The system includes a pressure regulator and a safety shut-off valve that feeds a main gas rail. The gas rail is operatively connected to a gas admission valve by a gas jumper tube. The gas admission valve is operatively connected to a gas admission port in a cylinder head or to an intake runner via a gas delivery tube. The gas admission valve has an effective cross sectional area that is defined by the actual cross sectional area multiplied by a modifying coefficient. The components of the system are sized based upon the effective cross sectional area of the gas admission valve.
Abstract translation: 本公开涉及一种用于在双燃料端口喷射系统中的系统部件的尺寸的系统和方法。 该系统包括一个压力调节器和一个安全截止阀，它为主气体导轨供电。 气轨通过气体跳线管可操作地连接到气体进入阀。 气体进入阀通过气体输送管可操作地连接到气缸盖中的气体入口或进气口。 气体入口阀具有由实际横截面面积乘以修正系数所限定的有效截面面积。 系统的部件基于进气阀的有效横截面积来定尺寸。
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公开(公告)号：US20190186391A1
公开(公告)日：2019-06-20
申请号：US15848204
申请日：2017-12-20
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
CPC classification number: F02D41/0027 , F02D35/023 , F02D41/222 , F02D41/26 , F02D2041/224
Abstract: A dual fuel engine control system includes a pressure sensor, and an electronic control unit coupled with the pressure sensor and structured to receive cylinder pressure data indicative of cylinder over-pressurization, and to switch the system to a limited gas-to-liquid substitution mode based on the cylinder pressure data indicative of cylinder over-pressurization. The electronic control unit is further structured to return the system to a normal gas-to-liquid substitution mode, receive cylinder pressure data indicative of cylinder over-pressurization after returning the system to the normal gas-to-liquid substitution mode, and responsively output a gas substitution fault signal.
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Patent Agency Ranking
公开(公告)号：US20180073452A1
公开(公告)日：2018-03-15
申请号：US15263945
申请日：2016-09-13
Applicant: Caterpillar Inc.
Inventor： Michael D. Gough , Nathan Atterberry , Jeff Howard , Brian Bell , Hua Xu
CPC classification number: F02D41/0027 , F02B3/12 , F02B37/00 , F02B43/00 , F02B43/12 , F02B63/04 , F02D19/0647 , F02D35/023 , F02D41/0007 , F02D41/0025 , F02D41/1446 , F02D41/401 , F02D2041/389 , F02D2200/04 , F02D2200/0602
Abstract: A system and method for automatically calibrating an engine operating with a first fuel and a second fuel includes comparing each of a plurality of engine operating parameters with a corresponding limit, determining whether any of the plurality of engine operating parameters has exceeded its corresponding limit and, while none of the plurality of engine operating parameters has exceeded its corresponding limit, automatically and incrementally advance start of injection timing.
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公开(公告)号：US11668230B2
公开(公告)日：2023-06-06
申请号：US17248516
申请日：2021-01-28
Applicant: Caterpillar Inc.
Inventor： Aaron Luke Robinson , Jonathan P. Kilkenny , Nathan Atterberry
IPC: F02B37/22
CPC classification number: F02B37/22 , F02D2250/34
Abstract: An annular disk comprises a front surface, a rear surface, an outer surface, and an inner surface. The front surface has a front opening within a front plane. The rear surface has a rear opening within a rear plane. The rear opening, which has a diameter that is smaller than a diameter of the front opening, communicates with the front opening to define a bore for guiding an exhaust stream flowing from a turbocharger to an exhaust outlet. The outer surface connects the front surface to the rear surface and includes an outer angled portion, an outer radial portion, and an outer axial portion. The inner surface includes an inner angled portion, an inner axial portion, and an inner radial portion extending between the inner angled portion and the inner axial portion. The inner radial portion is configured to obstruct a portion of the exhaust stream to increase back pressure.
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公开(公告)号：US11105278B2
公开(公告)日：2021-08-31
申请号：US15423905
申请日：2017-02-03
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Jordan Engfehr , Hua Xu
Abstract: An engine control system includes a dual fuel internal combustion engine, a fuel system including a liquid fuel source and a gaseous fuel source, and a controller. The engine control system further includes a liquid fuel control module and at least one gaseous fuel control module associated with a first and second subset of cylinders, each communicatively connected over a network. The controller has an operating mode and a cylinder deactivation mode. The controller in the operating mode is configured to instruct the liquid fuel control module and the at least one gaseous fuel control module to operate the plurality of cylinders in a dual fuel mode. The controller in the cylinder deactivation mode transitions the plurality of cylinders to a liquid-fuel only mode over a phase out period, deactivates the first subset of cylinders, and then transitions to the dual fuel mode in the second subset of cylinders.
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公开(公告)号：US20210071596A1
公开(公告)日：2021-03-11
申请号：US16566357
申请日：2019-09-10
Applicant: Caterpillar Inc.
Inventor： Nathan Atterberry , Matthew Parker , Matthew Engfehr
IPC: F02D19/06
Abstract: A fuel control system can operate an internal combustion engine to selectively combust a first fuel, such as diesel, during a single fuel mode and to combust the first fuel and a second fuel, such natural gas, during a fuel substitution mode. An in-cylinder parameter sensor is in communication with the combustion chamber of the internal combustion engine to measure an in-cylinder parameter such as, for example, the indicated mean effective pressure, during combustion of the first fuel during the single fuel mode. The fuel control system utilizes the in-cylinder parameter to determine a first fuel quantity error and can adjust delivery of the first fuel to correct for the first fuel quantity error during the single fuel and fuel substitution modes. The fuel control system can also use the first fuel quantity error to determine and adjust for a second fuel quantity error.
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公开(公告)号：US10145319B1
公开(公告)日：2018-12-04
申请号：US15877822
申请日：2018-01-23
Applicant: Caterpillar Inc.
Inventor： Matthew Jordan Engfehr , Nathan Atterberry
Abstract: Operating a dual fuel engine system includes firing combustion cylinders on a liquid fuel or both the liquid fuel and a gaseous fuel, and selectively cutting out at least one of the combustion cylinders based on a cylinder pressure parameter. A subset of those combustion cylinders remaining active after cylinder cutout is fired at a gas-to-liquid substitution ratio based on a user-settable combustion optimization term. The optimization term can include an efficiency term, an emissions term, and/or a fuel cost term, each of which has a finite range of values including a diesel equivalency value.
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