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    Inline Turbocharger Arrangement and Method
    21.
    发明申请
    Inline Turbocharger Arrangement and Method 审中-公开

    公开(公告)号：US20190226389A1

    公开(公告)日：2019-07-25

    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

    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.

    System and method for determining the specific gravity of a gaseous fuel
    23.
    发明授权
    System and method for determining the specific gravity of a gaseous fuel 有权
    用于确定气体燃料的比重的系统和方法

    公开(公告)号：US09528922B2

    公开(公告)日：2016-12-27

    申请号：US14311853

    申请日：2014-06-23

    Applicant: Caterpillar Inc.

    Inventor： Arvind Sivasubramanian ,  Christopher Gallmeyer ,  Venkat Vijay Kishore Turlapati ,  Brett Zook ,  Jason Rasmussen

    IPC: G01N9/26 ,  G01N33/22

    CPC classification number: G01N9/26 ,  G01N33/225

    Abstract: The disclosure relates to a system and method for determining the specific gravity of a fuel used in a dual fuel engine. The system includes a fuel rail, at least one sensor, and a processor. The method includes sensing and recording, with the at least one sensor and the at least one memory, a first pressure profile of a first fuel in the fuel rail and a second pressure profile of a second fuel in the fuel rail. The first fuel has a known specific gravity and the second fuel has an unknown specific gravity. The method further includes calculating the second specific gravity of the second fuel, with a processor, based on the first pressure profile, the second pressure profile, and the first specific gravity.

    Abstract translation: 本公开涉及一种用于确定在双燃料发动机中使用的燃料的比重的系统和方法。 该系统包括燃料轨，至少一个传感器和处理器。 该方法包括利用至少一个传感器和至少一个存储器来感测和记录燃料轨道中的第一燃料的第一压力分布和燃料轨道中的第二燃料的第二压力分布。 第一燃料具有已知比重，第二燃料具有未知的比重。 该方法还包括基于第一压力分布，第二压力分布和第一比重，用处理器计算第二燃料的第二比重。

    Method and System for Controlling an Air-Fuel Ratio in an Engine Using a Fuel Source with an Unknown Composition
    25.
    发明申请
    Method and System for Controlling an Air-Fuel Ratio in an Engine Using a Fuel Source with an Unknown Composition 有权
    使用具有未知构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：US20160258379A1

    公开(公告)日：2016-09-08

    申请号：US14639453

    申请日：2015-03-05

    Applicant: Caterpillar Inc.

    Inventor： Jason Jon Rasmussen ,  Arvind Sivasubramanian ,  Venkat Vijay Kishore Turlapati

    IPC: F02D41/26

    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。

    INJECTION TIMING MANAGEMENT IN DUAL FUEL ENGINE SYSTEM
    26.
    发明申请
    INJECTION TIMING MANAGEMENT IN DUAL FUEL ENGINE SYSTEM 有权
    双燃料发动机系统注油时间管理

    公开(公告)号：US20140290623A1

    公开(公告)日：2014-10-02

    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

    IPC: F02D41/40

    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. 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。 此外，确定发动机系统的操作模式的变化方向，并且以第一转换速率或第二速率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进行转换。

    Intake Pressure Control In Internal Combustion Engine
    27.
    发明申请
    Intake Pressure Control In Internal Combustion Engine 审中-公开
    内燃机进气压力控制

    公开(公告)号：US20140121941A1

    公开(公告)日：2014-05-01

    申请号：US13662805

    申请日：2012-10-29

    Applicant: CATERPILLAR, INC.

    Inventor： Arvind Sivasubramanian ,  Christopher F. Gallmeyer

    IPC: F02D41/26

    CPC classification number: F02D41/067 ,  F02B37/16 ,  F02B37/18 ,  F02D41/0007 ,  F02D41/0027 ,  F02D2200/0406 ,  Y02T10/144

    Abstract: Controlling intake pressure in an internal combustion engine includes calculating a proportional control term based on a difference between actual and desired intake pressure, determining choke and waste gate position values responsive to the proportional control term, and commanding a change in position of the choke or waste gate responsive to the corresponding position value to adjust actual intake pressure toward desired intake pressure. Related apparatus and control logic is also disclosed.

    Abstract translation: 控制内燃机中的进气压力包括基于实际和期望的进气压力之间的差值计算比例控制项，根据比例控制项确定扼流圈和废门位置值，并指示扼流圈或废物位置的变化 闸门响应于相应的位置值，以将实际进气压力调节到期望的进气压力。 还公开了相关装置和控制逻辑。

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