公开(公告)号：US20180066618A1

公开(公告)日：2018-03-08

申请号：US15255999

申请日：2016-09-02

Applicant: Caterpillar Inc.

Inventor： Matthew J. ENGFEHR ,  Nathan P. ATTERBERRY ,  David F. SCHALLER

IPC: F02M35/10 ,  F02D35/02 ,  F02D41/00 ,  F02M35/104 ,  F02M21/06 ,  F01P3/20

CPC classification number: F02M21/06 ,  F01P3/20 ,  F02D35/023 ,  F02D35/027 ,  F02D41/0002 ,  F02D41/0025 ,  F02D41/0027 ,  F02D2200/021 ,  F02D2200/0414 ,  F02M31/10 ,  F02M31/105 ,  F02M31/107 ,  F02M31/18 ,  F02M31/183 ,  F02M31/205 ,  F02M35/10157 ,  F02M35/10268 ,  F02M35/1038 ,  F02M35/104

Abstract: A system, method, and apparatus for controlling intake manifold air temperature (IMAT) of a dual fuel engine are provided. A determination regarding whether IMAT is to be modified is performed, followed by modifying the IMAT by changing flow of coolant in a cooling circuit in fluid communication with a separate circuit aftercooler (SCAC) of a SCAC circuit from a first flow path to a second flow path when it is determined that the IMAT is to be modified. A portion of the first flow path overlaps a portion of the second flow path.

公开(公告)号：US20200248638A1

公开(公告)日：2020-08-06

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

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：US20180112622A1

公开(公告)日：2018-04-26

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.