公开(公告)号：US09903264B1

公开(公告)日：2018-02-27

申请号：US15296181

申请日：2016-10-18

申请人： Caterpillar Inc.

发明人： Mary Louise Yeager ,  Lucas Allen Burger ,  Andrew Loetz ,  Brett Zook

IPC分类号： F02B19/10 ,  F02D41/30 ,  F02B19/12 ,  F02B43/10 ,  F02D41/00 ,  F02D41/14

CPC分类号： F02B19/1085 ,  F02B19/12 ,  F02B43/10 ,  F02B2043/103 ,  F02D35/023 ,  F02D35/024 ,  F02D41/0027 ,  F02D41/1439 ,  F02D41/28 ,  F02D41/3094

摘要： A control system for an engine cylinder having a pre-chamber and a main chamber includes a pressure sensor being provided in the pre-chamber, and a processor coupled to the pressure sensor. The processor is configured to measure pre-chamber pressure using the pressure sensor, determine a peak pre-chamber pressure from the measured pre-chamber pressure, calculate an estimated main chamber pressure corresponding to the peak pre-chamber pressure from at least one cylinder condition at ignition, calculate a pressure ratio of the peak pre-chamber pressure to the estimated main chamber pressure, calculate a fuel parameter for at least one of the pre-chamber and main chamber from the pressure ratio to achieve a desired pressure ratio, and generate a control signal to provide fuel to at least one of the pre-chamber and main chamber in accordance with the fuel parameter.

公开(公告)号：US20150369716A1

公开(公告)日：2015-12-24

申请号：US14311853

申请日：2014-06-23

申请人： Caterpillar Inc.

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

IPC分类号： G01N9/26

CPC分类号： G01N9/26 ,  G01N33/225

摘要： 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.

摘要翻译： 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：US09546941B2

公开(公告)日：2017-01-17

申请号：US14703587

申请日：2015-05-04

申请人： Caterpillar Inc.

发明人： Jason Rasmussen ,  Brett Zook ,  Baoyang Deng ,  Arvind Sivasubramanian

IPC分类号： F02D19/00 ,  G01N9/26 ,  F02B43/10 ,  F02D19/02 ,  G01N9/36 ,  G01N9/00

CPC分类号： G01N9/266 ,  F02B43/00 ,  F02B43/10 ,  F02B43/12 ,  F02B45/10 ,  F02B2043/103 ,  F02D19/026 ,  F02D19/029 ,  F02D19/061 ,  F02D19/0628 ,  F02D19/0636 ,  F02D19/10 ,  F02D41/0025 ,  F02D41/0027 ,  F02D2200/025 ,  F02D2200/0611 ,  F02D2200/0612 ,  F02D2250/04 ,  G01N9/24 ,  G01N9/26 ,  G01N9/36 ,  G01N2009/004 ,  Y02T10/32 ,  Y02T10/34 ,  Y02T10/36

摘要： A method for estimating a specific gravity of a gaseous fuel is described. The gaseous fuel may power an engine and the engine may include a cylinder, a gas valve configured to supply an intake port of the cylinder with the gaseous fuel, a gas rail configured to deliver the gaseous fuel to the gas valve, and a microprocessor adapted to perform the method. The method may comprise establishing a pressure wave in the gas rail by opening and closing the gas valve, wherein the pressure wave travels at the speed of sound in the gaseous fuel. The method may further comprise determining a frequency of the pressure wave in the gas rail, and estimating the specific gravity of the gaseous fuel based on the frequency of the pressure wave.

摘要翻译： 描述了用于估计气体燃料的比重的方法。 气体燃料可以为发动机供电，并且发动机可以包括气缸，构造成向汽缸的进气口供应气体燃料的气阀，构造成将气体燃料输送到气阀的气轨，以及微处理器 执行该方法。 该方法可以包括通过打开和关闭气阀来在气轨中建立压力波，其中压力波以气体燃料中的声速行进。 该方法还可以包括确定气轨中的压力波的频率，以及基于压力波的频率来估计气体燃料的比重。

公开(公告)号：US09528922B2

公开(公告)日：2016-12-27

申请号：US14311853

申请日：2014-06-23

申请人： Caterpillar Inc.

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

IPC分类号： G01N9/26 ,  G01N33/22

CPC分类号： G01N9/26 ,  G01N33/225

摘要： 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.

摘要翻译： 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：US20160327464A1

公开(公告)日：2016-11-10

申请号：US14703587

申请日：2015-05-04

申请人： Caterpillar Inc.

发明人： Jason Rasmussen ,  Brett Zook ,  Baoyang Deng ,  Arvind Sivasubramanian

IPC分类号： G01N9/26 ,  F02B43/10

CPC分类号： G01N9/266 ,  F02B43/00 ,  F02B43/10 ,  F02B43/12 ,  F02B45/10 ,  F02B2043/103 ,  F02D19/026 ,  F02D19/029 ,  F02D19/061 ,  F02D19/0628 ,  F02D19/0636 ,  F02D19/10 ,  F02D41/0025 ,  F02D41/0027 ,  F02D2200/025 ,  F02D2200/0611 ,  F02D2200/0612 ,  F02D2250/04 ,  G01N9/24 ,  G01N9/26 ,  G01N9/36 ,  G01N2009/004 ,  Y02T10/32 ,  Y02T10/34 ,  Y02T10/36

摘要： A method for estimating a specific gravity of a gaseous fuel is described. The gaseous fuel may power an engine and the engine may include a cylinder, a gas valve configured to supply an intake port of the cylinder with the gaseous fuel, a gas rail configured to deliver the gaseous fuel to the gas valve, and a microprocessor adapted to perform the method. The method may comprise establishing a pressure wave in the gas rail by opening and closing the gas valve, wherein the pressure wave travels at the speed of sound in the gaseous fuel. The method may further comprise determining a frequency of the pressure wave in the gas rail, and estimating the specific gravity of the gaseous fuel based on the frequency of the pressure wave.

摘要翻译： 描述了用于估计气体燃料的比重的方法。 气体燃料可以为发动机供电，并且发动机可以包括气缸，构造成向汽缸的进气口供应气体燃料的气阀，构造成将气体燃料输送到气阀的气轨，以及微处理器 执行该方法。 该方法可以包括通过打开和关闭气阀来在气轨中建立压力波，其中压力波以气体燃料中的声速行进。 该方法还可以包括确定气轨中的压力波的频率，以及基于压力波的频率来估计气体燃料的比重。