公开(公告)号：US20190136771A1

公开(公告)日：2019-05-09

申请号：US15803885

申请日：2017-11-06

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Nathan P. Atterberry

IPC: F02D35/02 ,  F02D41/22 ,  F02B77/08 ,  F02D41/00 ,  G01M15/08

CPC classification number: F02D35/023 ,  B60R16/0232 ,  F02B77/085 ,  F02B2075/1848 ,  F02D41/0025 ,  F02D41/0087 ,  F02D41/009 ,  F02D41/222 ,  F02D41/3094 ,  F02D2041/285 ,  G01M15/08

Abstract: A method for predicting failure in a cylinder of a multi-cylinder engine is provided. Each cylinder has an associated pressure sensor to provide a signal indicative of pressure in the cylinder. The method includes identifying whether there is a non-fueling interval associated with any of the cylinder on the engine. The method includes determining at least one of parameters such as an indicated mean effective pressure, a peak cylinder pressure, a total heat released, or a total duration of heat released over a combustion cycle for the cylinder. The method includes comparing the at least one of the parameters with predefined threshold value, determining whether any of the parameters exceeds the predefined threshold value, and generating a signal indicating the impending cylinder failure if at least one of the parameters exceeds the corresponding predefined threshold value.

公开(公告)号：US10006398B2

公开(公告)日：2018-06-26

申请号：US15333245

申请日：2016-10-25

Applicant: Caterpillar Inc.

Inventor： Nathan P. Atterberry ,  Matthew J. Engfehr

IPC: F02D43/00 ,  F02D41/00 ,  F02D41/26

CPC classification number: F02D43/00 ,  F02D35/023 ,  F02D37/02 ,  F02D41/0025 ,  F02D41/0027 ,  F02D41/14 ,  F02D41/26 ,  F02D41/3005 ,  F02D2041/141 ,  F02D2200/0611 ,  F02D2200/0625

Abstract: A control system for a multiple fuel internal combustion engine on a vehicle in a fleet of vehicles may include at least one gas analyzer configured to monitor real-time characteristics of gaseous fuel being supplied to the engine, a fleet management data monitoring module, and a cylinder pressure sensor associated with each cylinder of the engine. The control system may further include a data collection module configured to receive real-time fuel characteristics measurements from the gas analyzer, fleet data characteristic of one or more operational parameters, fuel usage, and performance results for vehicles in the fleet, and cylinder pressure measurements from each of the cylinder pressure sensors. An engine electronic control module may calculate one or more actual combustion parameter values from the real-time cylinder pressure measurements, assign weights to fuel characteristics data, cylinder pressure data, and fleet management data, and control at least one of fuel injection and ignition timing based on the weighted data and any difference between calculated actual combustion parameter values for each cylinder and predetermined combustion parameter values.

公开(公告)号：US10934948B2

公开(公告)日：2021-03-02

申请号：US15888126

申请日：2018-02-05

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Nathan P. Atterberry ,  Hua Xu

IPC: F02D19/06 ,  F02D41/22 ,  F02M35/10 ,  F02D41/00

Abstract: A method for determining failure of an electromechanically actuated gas shut off valve includes sensing and recording a gas fuel rail pressure and a boost pressure from an air intake manifold at a first time after the dual fuel engine has been started. The method includes opening the gas shut off valve at a second time, holding the gas shut off valve in its open state, and then closing the gas shut off valve after a predetermined interval at a third time. The method includes comparing an actual gas rail pressure decay rate to a threshold gas rail pressure decay rate for the predetermined interval, and determining failure of the gas shut off valve when the actual gas rail pressure decay rate is less than the threshold gas rail pressure decay rate. Upon determining failure of the gas shut off valve, the method also includes initiating a mitigating action.

公开(公告)号：US10113493B2

公开(公告)日：2018-10-30

申请号：US15358453

申请日：2016-11-22

Applicant: Caterpillar Inc.

Inventor： Nathan P. Atterberry ,  Matthew J. Engfehr

IPC: F02B9/02 ,  F02D41/00 ,  F02M35/10 ,  F02M35/104 ,  F02B37/00 ,  F02B29/04 ,  F01N13/10 ,  F02D41/14 ,  F01N13/00 ,  F02M21/02

Abstract: A system, method and apparatus for controlling a gas substitution characteristic in a dual fuel engine are provided. The gas substitution characteristic can be controlled based on measured characteristics directly or indirectly associated with operation of the dual fuel engine, including intake manifold air pressure (IMAP), load of the dual fuel engine, ambient air temperature, exhaust temperature, fan speed, and/or pressure of natural gas supplied to the dual fuel engine. Further, the gas substitution characteristic can be controlled by controlling intake manifold air temperature (IMAT) based on control of a cooling capacity of a cooling circuit.

公开(公告)号：US10760506B2

公开(公告)日：2020-09-01

申请号：US16269358

申请日：2019-02-06

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Asha L. Pai ,  Roderick S. Zehrung ,  Derek P. Samsel ,  Brett M. Nee ,  Joshua Perko

IPC: F02D41/00 ,  G01F13/00 ,  G01F23/18 ,  G01F25/00 ,  F02D19/06 ,  F02D19/10 ,  F02D41/38 ,  G01L13/00 ,  F02D41/22

Abstract: A gaseous fuel supply system for an internal combustion engine may include a storage tank for storing liquefied gaseous fuel and supplying the fuel to the engine. The system may also include a liquid level sensor for measuring a level value of the liquefied gaseous fuel in the storage tank and a pressure sensor for measuring a pressure value of gaseous fuel in the fuel supply system. The system may further include a controller. The controller may be configured to: monitor a pressure signal of the pressure sensor indicating the pressure value and a tank level signal of the liquid level sensor indicating the level value; store the level value when the pressure value indicates the storage tank is empty; store the level value when the pressure value or the level value indicates the storage tank is full; and determine a calibrated level range based on the stored level values.

公开(公告)号：US10570833B2

公开(公告)日：2020-02-25

申请号：US15803885

申请日：2017-11-06

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Nathan P. Atterberry

IPC: F02D35/02 ,  F02D41/00 ,  G01M15/08 ,  F02B77/08 ,  F02D41/22 ,  B60R16/023 ,  F02D41/28 ,  F02B75/18 ,  F02D41/30

Abstract: A method for predicting failure in a cylinder of a multi-cylinder engine is provided. Each cylinder has an associated pressure sensor to provide a signal indicative of pressure in the cylinder. The method includes identifying whether there is a non-fueling interval associated with any of the cylinder on the engine. The method includes determining at least one of parameters such as an indicated mean effective pressure, a peak cylinder pressure, a total heat released, or a total duration of heat released over a combustion cycle for the cylinder. The method includes comparing the at least one of the parameters with predefined threshold value, determining whether any of the parameters exceeds the predefined threshold value, and generating a signal indicating the impending cylinder failure if at least one of the parameters exceeds the corresponding predefined threshold value.

公开(公告)号：US20190242307A1

公开(公告)日：2019-08-08

申请号：US15888126

申请日：2018-02-05

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Nathan P. Atterberry ,  Hua Xu

IPC: F02D19/06 ,  F02M35/10

CPC classification number: F02D19/0623 ,  F02D19/0605 ,  F02D19/0615 ,  F02D19/0628 ,  F02D19/0642 ,  F02D19/0665 ,  F02D19/0681 ,  F02M35/1038

Abstract: A method for determining failure of an electromechanically actuated gas shut off valve includes sensing and recording a gas fuel rail pressure and a boost pressure from an air intake manifold at a first time after the dual fuel engine has been started. The method includes opening the gas shut off valve at a second time, holding the gas shut off valve in its open state, and then closing the gas shut off valve after a predetermined interval at a third time. The method includes comparing an actual gas rail pressure decay rate to a threshold gas rail pressure decay rate for the predetermined interval, and determining failure of the gas shut off valve when the actual gas rail pressure decay rate is less than the threshold gas rail pressure decay rate. Upon determining failure of the gas shut off valve, the method also includes initiating a mitigating action.

公开(公告)号：US20180142633A1

公开(公告)日：2018-05-24

申请号：US15358453

申请日：2016-11-22

Applicant: Caterpillar Inc.

Inventor： Nathan P. ATTERBERRY ,  Matthew J. Engfehr

IPC: F02D41/00 ,  F02B9/02 ,  F02M35/10 ,  F02M35/104 ,  F02B37/00 ,  F02B29/04 ,  F01N13/10 ,  F02D41/14 ,  F01N13/00 ,  F02M21/02

CPC classification number: F02D41/0027 ,  F01N9/00 ,  F01N13/008 ,  F01N13/10 ,  F01N2340/02 ,  F01N2900/1404 ,  F02B9/02 ,  F02B29/0425 ,  F02B37/00 ,  F02B43/00 ,  F02B2201/06 ,  F02D41/0007 ,  F02D41/1446 ,  F02M21/0215 ,  F02M35/10157 ,  F02M35/10268 ,  F02M35/1038 ,  F02M35/104

Abstract: A system, method and apparatus for controlling a gas substitution characteristic in a dual fuel engine are provided. The gas substitution characteristic can be controlled based on measured characteristics directly or indirectly associated with operation of the dual fuel engine, including intake manifold air pressure (IMAP), load of the dual fuel engine, ambient air temperature, exhaust temperature, fan speed, and/or pressure of natural gas supplied to the dual fuel engine. Further, the gas substitution characteristic can be controlled by controlling intake manifold air temperature (IMAT) based on control of a cooling capacity of a cooling circuit.

公开(公告)号：US10794346B2

公开(公告)日：2020-10-06

申请号：US16256740

申请日：2019-01-24

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Brian M. Boksa ,  Brian S. Jones

IPC: F02M55/02 ,  F02M69/46 ,  F02D19/06

Abstract: A fuel rail for an engine includes a tubular body having an outer surface and an inner surface, the inner surface defining a longitudinally extending fuel bore. The fuel rail also includes a valve bore extending normal to the fuel bore and extending through the outer surface of the tubular body at a first end and completely through the fuel bore to a second end.

公开(公告)号：US20200240376A1

公开(公告)日：2020-07-30

申请号：US16256740

申请日：2019-01-24

Applicant: Caterpillar Inc.

Inventor： Matthew J. Engfehr ,  Brian M. Boksa ,  Brian S. Jones

IPC: F02M55/02 ,  F02D19/06 ,  F02M69/46

Abstract: A fuel rail for an engine includes a tubular body having an outer surface and an inner surface, the inner surface defining a longitudinally extending fuel bore. The fuel rail also includes a valve bore extending normal to the fuel bore and extending through the outer surface of the tubular body at a first end and completely through the fuel bore to a second end.