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11.发明申请公开(公告)号：US20140136080A1
公开(公告)日：2014-05-15
申请号：US13677441
申请日：2012-11-15
Applicant: CATERPILLAR INC.
Inventor： Arvind Sivasubramanian , Christopher F. Gallmeyer , David James Lin
IPC: F02D19/06
CPC classification number: F02D19/0623 , F02D19/061 , F02D19/0628 , F02D19/081 , F02D35/027 , F02D41/0027 , F02D41/1446 , Y02T10/36
Abstract: A control system for a dual gaseous and liquid fuel engine includes an electronic controller configured to receive data from a plurality of sensing mechanisms indicative of an error in a plurality of different engine operating parameters. The electronic controller is further configured to determine a highest priority one of the errors, and limit substitution of the gaseous fuel responsive to a normalized value thereof.
Abstract translation: 用于双气体和液体燃料发动机的控制系统包括电子控制器，其被配置为从多个感测机构接收指示多个不同发动机操作参数中的误差的数据。 电子控制器还被配置为确定误差中的最高优先级之一，并且响应于其归一化值来限制气体燃料的替代。
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公开(公告)号：US20140102416A1
公开(公告)日：2014-04-17
申请号：US13649133
申请日：2012-10-11
Applicant: CATERPILLAR INC.
Inventor： Arvind Sivasubramanian , Venkat Vijay Kishore Turlapati
CPC classification number: F02D41/3845 , F02B29/0406 , F02D19/022 , F02D19/023 , F02D41/0007 , F02D41/0027 , F02D41/18 , F02D41/3094 , F02D2200/0602 , F02D2200/0614 , F02M21/0239 , F02M21/0245 , Y02T10/32
Abstract: A fuel management system for an engine having a common fuel rail. The fuel management system includes means to regulate air supply and fuel supply. A control unit is provided to determine a maximum allowable fuel mass flow supplied from the fuel rail, based on the air supply and a predetermined air-fuel ratio for the operating parameters of the engine. The control unit calculates an allowable upper limit of rail pressure based on the determined maximum allowable fuel mass flow. The control unit regulates the fuel supply based on the determined allowable upper limit of the rail pressure.
Abstract translation: 一种用于具有共同燃料导轨的发动机的燃料管理系统。 燃料管理系统包括调节供气和燃料供应的手段。 提供控制单元，用于基于供气和用于发动机的操作参数的预定空燃比来确定从燃料轨提供的最大允许燃料质量流量。 控制单元基于确定的最大允许燃料质量流量来计算轨道压力的允许上限。 控制单元基于所确定的轨道压力的允许上限来调节燃料供给。
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公开(公告)号：US10746089B2
公开(公告)日：2020-08-18
申请号：US15879647
申请日：2018-01-25
Applicant: Caterpillar Inc.
Inventor： Jeremy Byrd , Eric L. Schroeder , Liangtao Zhu , Arvind Sivasubramanian , Ryan T. Sunley , Craig P. Hittle , Aaron L. Robinson
IPC: F02B37/02 , F02B37/007 , F02C6/12 , F01N13/00 , F02D13/02 , F01N13/18 , F01D25/12 , F02D41/00 , F01D25/14 , F02B37/22 , F02B37/00 , F02D9/04 , F02B75/22 , F02F1/42 , F02B75/18 , F02M35/116 , F01N3/04 , F02D41/22 , F02B33/40 , F02M35/10 , F02B39/00
Abstract: An internal combustion engine having an exhaust log structure onto which a plurality of turbochargers is connected, each turbocharger having a turbine connected to the exhaust log structure and having an inlet fluidly connectable to a respective one of the plurality of outlet ports, an exhaust valve disposed at a turbine outlet such that the flow of exhaust gas out of the turbine is fluidly blocked, and an actuator associated with the exhaust valve and operating to move the exhaust valve from a closed position to an open position and vice versa. An electronic controller provides a command to the actuator to move the exhaust valve between the open and closed positions and is programmed to selectively open two one or more exhaust valves based on an operating condition of the engine.
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14.发明授权Method and system for controlling an air-fuel ratio in an engine using a fuel source with an unknown composition 有权使用未知组成的燃料源来控制发动机中的空燃比的方法和系统公开(公告)号：US09593629B2
公开(公告)日：2017-03-14
申请号：US14639453
申请日：2015-03-05
Applicant: Caterpillar Inc.
CPC classification number: F02D19/0642 , F02D19/0636 , F02D19/0647 , F02D19/0694 , F02D35/023 , F02D41/0002 , F02D41/0025 , F02D41/0027 , F02D2200/0612 , Y02T10/36 , Y02T10/42
Abstract: A method for controlling an air-fuel ratio (AFR) in an engine powered by a gaseous fuel having an unknown composition may comprise receiving an assumed gas species composition for the gaseous fuel, and determining an assumed lower heating value (LHV) for the assumed gas species composition. The method may further comprise determining a perceived lower heating value (LHV) for the gaseous fuel based on a perceived gas mass flow and a gas energy flow for the gaseous fuel, and updating the assumed gas species composition until the assumed LHV and the perceived LHV are aligned. The method may further comprise determining a desired AFR and an airflow necessary to provide the desired AFR using the aligned gas species composition and a desired lambda (λ), and adjusting an air system controller of the engine to provide the airflow.
Abstract translation: 用于控制由具有未知组成的气体燃料驱动的发动机中的空燃比（AFR）的方法可以包括接收用于气体燃料的假设气体组分，并且为假定的假定的低热值（LHV）确定 气体组成。 该方法可以进一步包括基于感知的气体质量流量和气体燃料的气体能量流量来确定气体燃料的感知到的较低热值（LHV），并且更新所假定的气体种类组成，直到假设的LHV和感知的LHV 对齐。 该方法可以进一步包括使用对准的气体种类组合物和期望的λ（λ）来确定所需的AFR和提供期望的AFR所需的气流，以及调节发动机的空气系统控制器以提供气流。
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公开(公告)号：US20160252036A1
公开(公告)日：2016-09-01
申请号：US15150751
申请日：2016-05-10
Applicant: Caterpillar Inc.
Inventor： Hua Xu , Arvind Sivasubramanian , Shaun D. Fogle , David J. Lin
CPC classification number: F02D41/1475 , F02D41/1463 , F02D2041/281 , F02D2041/286
Abstract: The disclosure provides a method to operate an engine system. The method begins by determination of a current NOx value. If the current NOx value is greater than a first predetermined NOx target, an air-fuel ratio (AFR) set-point is adjusted by a first predetermined value in towards a rich AFR. Upon detection of the current NOx value below the first predetermined NOx target, a first average of NOx values for a first predetermined time is determined. The AFR set-point is adjusted by a second predetermined value and a second average of NOx values for a second predetermined time is determined. A delta NOx value is determined as a difference between the first average and the second average and compared with a second predetermined NOx target. The AFR set-point is determined when the delta NOx value is below the second predetermined NOx target.
Abstract translation: 本公开提供了一种操作发动机系统的方法。 该方法通过确定当前的NOx值开始。 如果当前的NOx值大于第一规定的NOx目标，则将空燃比（AFR）设定点向着浓AFR调整第一预定值。 当检测到当前NOx值低于第一预定NOx目标值时，确定第一预定时间的NOx值的第一平均值。 AFR设定点被调整第二预定值，并确定第二预定时间的NOx值的第二平均值。 Δδ值被确定为第一平均值和第二平均值之差，并与第二预定NOx目标进行比较。 当ΔNOX值低于第二预定NOx靶时，确定AFR设定点。
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Patent Agency Ranking
公开(公告)号：US20160215686A1
公开(公告)日：2016-07-28
申请号：US15091441
申请日：2016-04-05
Applicant: Caterpillar Inc.
Inventor： Shawn M. Damm , Deepti V. Bhosekar , Arvind Sivasubramanian
CPC classification number: F02B37/183 , F02B37/186 , Y02T10/144
Abstract: A method to control a wastegate valve actuator by determining a NOx deadband with hysteresis for an engine controller is disclosed. This NOx deadband defines an outer band and an inner band. In this method, a NOx sensor keep sensing the NOx level in the exhaust gases and accordingly the engine controller sends commands to the wastegate valve actuator. At the NOx level less than inner band and the outer band, engine controller remains at deactivated state. When the NOx level goes outside the outer band, the engine controller sends dither command to the wastegate valve actuator and continues to send the dither command until the NOx level does not reach inside the NOx inner band. This method improves life of the wastegate valve assembly as separate activating and deactivating bands for the engine controller ensures less command fluctuations for the wastegate valve actuator.
Abstract translation: 公开了一种通过确定具有用于发动机控制器的滞后的NOx死区来控制废气门阀致动器的方法。 该NOx死区限定外带和内带。 在该方法中，NOx传感器保持感测废气中的NOx水平，因此发动机控制器向废气门阀致动器发送命令。 在NOx水平小于内带和外带的情况下，发动机控制器处于停用状态。 当NOx水平超出外带时，发动机控制器向废气门阀致动器发送抖动指令，并继续发送抖动指令，直到NOx水平未到达NOx内部区域内。 这种方法提高了废气门阀组件的寿命，因为用于发动机控制器的单独的启动和停用带确保了废气门阀致动器的较少的指令波动。
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公开(公告)号：US09212618B2
公开(公告)日：2015-12-15
申请号：US13854293
申请日：2013-04-01
Applicant: Caterpillar Inc.
Inventor： Arvind Sivasubramanian , David J. Lin , Keith A. Intveld , Jeffrey A. Howard , Christopher F. Gallmeyer
CPC classification number: F02D41/401 , F02D19/0613 , F02D19/0615 , F02D41/0025 , F02D41/3064 , F02D2200/604 , Y02T10/36 , Y02T10/44
Abstract: A fuel injection timing management system for a dual fuel engine is configured to determine a first diesel injection timing corresponding to a first mode of operation of the engine system and a second diesel injection timing corresponding to a second mode of operation. The system may further determine a direction of change in a mode of operation of the engine system, and selectively perform a change in the diesel injection timing from the first diesel injection timing to the second diesel injection timing at a first rate of transition or a second rate of transition, based on the direction of change in a mode of operation of the engine system.
Abstract translation: 用于双燃料发动机的燃料喷射定时管理系统被配置为确定对应于发动机系统的第一操作模式的第一柴油喷射正时和对应于第二操作模式的第二柴油喷射定时。 该系统还可以确定发动机系统的运行模式的变化方向，并且以第一转换速率或第二速度选择性地执行从第一柴油喷射正时到第二柴油喷射正时的柴油喷射正时的变化 基于发动机系统的操作模式的变化方向的转换速率。
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公开(公告)号：US20140290614A1
公开(公告)日：2014-10-02
申请号：US13851377
申请日：2013-03-27
Applicant: Caterpillar Inc.
Inventor： Arvind Sivasubramanian , Christopher F. Gallmeyer , David J. Lin , Brett A. Zook
IPC: F02D41/00
CPC classification number: F02D41/0097 , F02D31/002 , F02D31/007 , F02D41/062 , F02D41/067 , Y02T10/42
Abstract: An engine system includes a fuel supply unit configured to supply fuel into a combustion chamber. The engine system includes a fuel supply unit to regulate the supply of fuel into an inlet port via a fuel rail and an air supply unit configured to supply compressed air into the combustion chamber. A control system is configured to receive operating conditions of the engine system. Further, the control system includes a detector component configured to generate a control signal indicative of a start-up condition of an engine system. A switching component of the controller receives the control signal indicative of the start-up condition of the engine system from the detector component and further transmits a fuel supply control signal to the fuel valve based on an air-fuel ratio error signal, and transmit an air supply control signal to the choke valve based on an engine speed error signal.
Abstract translation: 发动机系统包括被配置为将燃料供应到燃烧室中的燃料供应单元。 发动机系统包括：燃料供给单元，其经由燃料轨调节进入入口的燃料供给;以及空气供给单元，其构造成将压缩空气供给到燃烧室。 控制系统被配置为接收发动机系统的操作条件。 此外，控制系统包括被配置为产生指示发动机系统的启动状态的控制信号的检测器部件。 控制器的切换部件从检测器部件接收表示发动机系统的启动状态的控制信号，并且还基于空燃比误差信号向燃料阀发送燃料供给控制信号， 基于发动机转速误差信号向阻流阀供气控制信号。
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公开(公告)号：US20140290215A1
公开(公告)日：2014-10-02
申请号：US13852342
申请日：2013-03-28
Applicant: CATERPILLAR INC.
Inventor： Arvind Sivasubramanian , Christopher F. Gallmeyer
IPC: F02D41/02
CPC classification number: F02D41/0295 , F02D41/0025 , F02D41/1441 , F02D41/1445 , F02D2200/0611 , F02D2200/0814
Abstract: A method for controlling emissions in an engine system including an internal combustion engine and a catalytic converter with oxygen storage capacity. The method includes determining a real time oxygen storage level of the three-way catalytic converter based on a real time exhaust gas flow rate and a real time measured upstream oxygen quantity with respect to the catalytic converter. Further, maintaining an optimal oxygen storage level of the three-way catalytic converter for different types of fuel used in the internal combustion engine.
Abstract translation: 一种用于控制包括内燃机和具有储氧能力的催化转化器的发动机系统中的排放的方法。 该方法包括基于实时废气流量和相对于催化转化器测量的上游氧气量的实时测定来确定三元催化转化器的实时氧气储存水平。 此外，维持用于内燃机中使用的不同类型燃料的三元催化转化器的最佳储氧量。
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公开(公告)号：US11286845B2
公开(公告)日：2022-03-29
申请号：US16505323
申请日：2019-07-08
Applicant: Caterpillar Inc.
Inventor： Shivangi Wagle , Liangtao Zhu , Kevin Sergott , Eric Schroeder , Arvind Sivasubramanian , Travis Barnes
IPC: F02B37/22 , F02B37/00 , F02B37/007 , F02D17/02 , F02D41/00
Abstract: A method for controlling and engine system with a plurality of turbochargers. At least one of the plurality of turbochargers has a turbine valve, a compressor valve, and actuators operable to change the position of the turbine valve. The method comprises controlling the actuator based on the presence of a transient event or a steady state event. During a transient event an engine control module can control the actuators to change the turbine valve to opened and closed positions and the turbine valve to a closed position based on the comparison between a corrected mass flow per turbocharger to a mass flow threshold.
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