公开(公告)号：US20210071596A1

公开(公告)日：2021-03-11

申请号：US16566357

申请日：2019-09-10

Applicant: Caterpillar Inc.

Inventor： Nathan Atterberry ,  Matthew Parker ,  Matthew Engfehr

IPC: F02D19/06

Abstract: A fuel control system can operate an internal combustion engine to selectively combust a first fuel, such as diesel, during a single fuel mode and to combust the first fuel and a second fuel, such natural gas, during a fuel substitution mode. An in-cylinder parameter sensor is in communication with the combustion chamber of the internal combustion engine to measure an in-cylinder parameter such as, for example, the indicated mean effective pressure, during combustion of the first fuel during the single fuel mode. The fuel control system utilizes the in-cylinder parameter to determine a first fuel quantity error and can adjust delivery of the first fuel to correct for the first fuel quantity error during the single fuel and fuel substitution modes. The fuel control system can also use the first fuel quantity error to determine and adjust for a second fuel quantity error.

公开(公告)号：US20190040804A1

公开(公告)日：2019-02-07

申请号：US15665842

申请日：2017-08-01

Applicant: Caterpillar Inc.

Inventor： Nathan Atterberry ,  Matthew Engfehr ,  Hua Xu

IPC: F02D19/06 ,  F02D19/08 ,  F02D19/10

Abstract: A dual fuel engine system, such as for diesel and natural gas operation, includes a control system having an electronic control unit structured to vary a stored control valve for a fuel delivery parameter, responsive to engine power output. The engine power output can be determined by in-cylinder pressure monitoring during a liquid fuel mode. The stored control value can be a dynamically updated value in an engine fueling map.