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。

公开(公告)号：US20140174406A1

公开(公告)日：2014-06-26

申请号：US13722592

申请日：2012-12-20

Applicant: CATERPILLAR, INC.

Inventor： Jason Jon Rasmussen

IPC: F02M25/07

CPC classification number: F02D41/0052 ,  F02D41/0077 ,  F02D41/10 ,  Y02T10/47

Abstract: A system associated with an internal combustion engine is disclosed. The system may be configured to inject fuel at a current fuel injection flow rate and to direct exhaust at a current EGR flow rate. A controller may be configured to determine a maximum fuel injection flow rate and a maximum EGR flow rate based on a first and second group of operating parameters, wherein the first and second group may comprise at least common operating parameter including an oxygen-to-fuel ratio limit. Additionally, the controller may set the current fuel injection flow rate to the maximum fuel injection if a fuel injection flow request, associated with a fuel injector, is greater than the maximum fuel injection flow rate and set the current EGR flow rate to the maximum EGR flow rate if an EGR flow request, associated with an EGR valve, is greater than the maximum EGR flow rate.

Abstract translation: 公开了一种与内燃机相关联的系统。 该系统可以被配置为以当前燃料喷射流量喷射燃料并且以当前的EGR流率引导排气。 控制器可以被配置为基于第一和第二组操作参数来确定最大燃料喷射流量和最大EGR流量，其中第一组和第二组可以包括至少共同的操作参数，包括氧 - 燃料 比例限制。 另外，如果与燃料喷射器相关联的燃料喷射流量请求大于最大燃料喷射流量并且将当前EGR流量设定为最大EGR，则控制器可以将当前燃料喷射流量设置为最大燃料喷射 与EGR阀相关联的EGR流量请求的流量大于最大EGR流量时的流量。

公开(公告)号：US20220325658A1

公开(公告)日：2022-10-13

申请号：US17229446

申请日：2021-04-13

Applicant: Caterpillar Inc.

Inventor： Chad Palmer Koci ,  Yongli Qi ,  Jason Jon Rasmussen ,  Daniel J. Sordelet

IPC: F02B23/06

Abstract: Operating an engine includes moving a piston in a combustion chamber between a bottom dead center position and a top dead center position in an engine cycle. A fuel is injected into the combustion chamber through a plurality of sets of nozzle outlets varied set-to-set with respect to outlet size and spray angle. Spray jets of the injected fuel are propagated in an impingement-limiting fuel spray pattern that is based on the set-to-set variation in outlet size and spray angle so as to limit dissipation of heat from combustion of the injected fuel to material of the engine by way of a thermal barrier coating (TBC) upon a surface of the combustion chamber.

公开(公告)号：US10934966B2

公开(公告)日：2021-03-02

申请号：US16279564

申请日：2019-02-19

Applicant: Caterpillar Inc.

Inventor： Jonathan W. Anders ,  Jason Jon Rasmussen ,  Bobby John

IPC: F02D41/40 ,  F02D13/02 ,  F02D35/02 ,  F02D41/00

Abstract: A combustion control system for a dual fuel engine includes a combustion control unit structured to receive phasing data for combustion of a main charge of gaseous fuel ignited by way of pilot shots of a liquid fuel, output a pilot fueling command based on the phasing data, and output a valve timing command. The combustion control unit is further structured to vary a phasing of combustion of a main charge of a gaseous fuel ignited by pilot shots of a liquid fuel based on an adjustment to at least one of a pilot shot delivery parameter or a valve timing parameter such as intake valve closing timing from a first engine cycle to a second engine cycle. Control of the intake valve timing can be based on a main pilot shot timing error.

公开(公告)号：US20200263627A1

公开(公告)日：2020-08-20

申请号：US16279564

申请日：2019-02-19

Applicant: Caterpillar Inc.

Inventor： Jonathan W. Anders ,  Jason Jon Rasmussen ,  Bobby John

IPC: F02D41/40 ,  F02D41/00 ,  F02D35/02 ,  F02D13/02

Abstract: A combustion control system for a dual fuel engine includes a combustion control unit structured to receive phasing data for combustion of a main charge of gaseous fuel ignited by way of pilot shots of a liquid fuel, output a pilot fueling command based on the phasing data, and output a valve timing command. The combustion control unit is further structured to vary a phasing of combustion of a main charge of a gaseous fuel ignited by pilot shots of a liquid fuel based on an adjustment to at least one of a pilot shot delivery parameter or a valve timing parameter such as intake valve closing timing from a first engine cycle to a second engine cycle. Control of the intake valve timing can be based on a main pilot shot timing error.

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.

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

IPC: F02D19/06 ,  F02D35/02 ,  F02D41/00 ,  F02D19/08

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。