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。

公开(公告)号：US20150369716A1

公开(公告)日：2015-12-24

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

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。

公开(公告)号：US11035317B2

公开(公告)日：2021-06-15

申请号：US16433839

申请日：2019-06-06

Applicant: Caterpillar Inc.

Inventor： Scott Fiveland ,  Arvind Sivasubramanian ,  Shivangi Wagle ,  Shawn Damm ,  Christopher Gallmeyer ,  Andy Pierpont

IPC: F02D41/40 ,  F02D41/00 ,  F02D41/14 ,  F02D19/10 ,  F02D19/06

Abstract: A control system for controlling pilot fuel injection in a dual fuel engine is disclosed. The control system may determine, using measurements from one or more sensors, one or more combustion parameters associated with the dual fuel engine during operation of the dual fuel engine. The control system may determine an estimated nitrogen oxides (NOx) emissions level based on the one or more combustion parameters, and may determine a NOx error based on a comparison between the estimated NOx emissions level and a desired NOx emissions level. The control system may control a quantity of pilot fuel injected into the dual fuel engine based on the NOx error.

公开(公告)号：US20160208749A1

公开(公告)日：2016-07-21

申请号：US14600841

申请日：2015-01-20

Applicant: Caterpillar Inc.

Inventor： Arvind Sivasubramanian ,  Vijay Turlapati ,  Christopher Gallmeyer ,  Jason Rasmussen

IPC: F02M43/04

CPC classification number: F02D41/0025 ,  F02D19/0642 ,  F02D31/001 ,  F02D41/0027 ,  F02D2200/0611 ,  F02D2200/101 ,  Y02T10/36

Abstract: A method for controlling fuel flow in a multi-fuel engine is disclosed. The method includes determining an estimated lower heating value (LHV) of a gaseous fuel by, at least, comparing a mapped volume flow value with an input volume flow value, the input volume flow value based on the input power. The method further includes determining a gaseous fuel flow rate for the gaseous fuel, the gaseous fuel flow rate based on, at least, a specific fuel substitution ratio of the gaseous fuel and a secondary fuel and the estimate LHV of the gaseous fuel source.

Abstract translation: 公开了一种用于控制多燃料发动机中的燃料流量的方法。 该方法包括通过至少将映射的体积流量值与输入体积流量值（基于输入功率）的输入体积流量值进行比较来确定气体燃料的估计的较低热值（LHV）。 该方法还包括基于气态燃料和二次燃料的特定燃料替代比和气体燃料源的估计LHV来确定气体燃料的气态燃料流量，气体燃料流量。

公开(公告)号：US20150300281A1

公开(公告)日：2015-10-22

申请号：US14257093

申请日：2014-04-21

Applicant: Caterpillar Inc.

Inventor： Arvind Sivasubramanian ,  Shivangi Wagle ,  Christopher Gallmeyer

IPC: F02D41/00

CPC classification number: F02D41/0027 ,  F02B37/16 ,  F02D41/0007 ,  F02D41/1401 ,  F02D2041/1409 ,  F02D2041/1418 ,  F02D2200/0406 ,  Y02T10/144

Abstract: Controlling intake pressure in a gaseous fuel internal combustion engine includes calculating a control term in an intake pressure control loop based on a pressure error, and adjusting a throttle valve and a second valve responsive to the control term in first and second control loop cycles. The second valve is within a return conduit returning compressed gases from a location downstream a compressor to a location upstream. A pressure of gaseous fuel and air within the intake conduit is changed via the adjustments so as to reduce the pressure error.

Abstract translation: 控制气体燃料内燃机中的进气压力包括基于压力误差来计算进气压力控制回路中的控制项，以及响应于第一和第二控制回路循环中的控制项来调节节流阀和第二阀。 第二阀在回流管道内，将压缩气体从压缩机下游的位置返回到上游位置。 进气管道内的气体燃料和空气的压力通过调节改变，以减小压力误差。