公开(公告)号：US20240200504A1

公开(公告)日：2024-06-20

申请号：US17909933

申请日：2021-05-06

Applicant: Cummins Inc.

Inventor： Mayur H. Borate ,  Srinivas Kumar Mulukutia ,  Shailesh Nair ,  David Michael Carey ,  Syed Shah Jalal

IPC: F02D41/22 ,  F02D41/00 ,  F02D41/40

CPC classification number: F02D41/221 ,  F02D41/009 ,  F02D41/401 ,  F02D2041/224 ,  F02D2041/228 ,  F02D2200/0602 ,  F02D2200/0618

Abstract: At least some embodiments of present disclosure direct to a fuel injection timing drift detection and/or compensation system. In some cases, the system collects or receives a series of fuel pressure data measured by one or more fuel pressure sensors. The system is configured to receive an indication of fuel flow cutout and a start-of-injection command signal. The system calculates a set of pressure drops using the series of fuel pressure data and identifies a selected pressure drop greater than a predetermined threshold to determine a measured start-of-injection timing based on the selected pressure drop. The system is further configured to evaluate whether a fuel injection drifting occurs based on received start-of-injection command signal and the measured start-of-injection timing. In some cases, the fuel injection drifting is used to either compensate fuel injection timing or raise a flag indicating the drifting.

公开(公告)号：US11015548B2

公开(公告)日：2021-05-25

申请号：US16772096

申请日：2017-12-14

Applicant: Cummins Inc.

Inventor： David M. Carey ,  Syed Shah Jalal ,  Richard J. Dudek ,  Ulf Carlsson ,  Paul Peavler

IPC: F02D41/38 ,  F02D41/20 ,  F02D41/00

Abstract: Methods and systems, using a controller (20), for performing fuel pressure control operation of an engine (12) having at least one cylinder (16) is disclosed. The controller (20) includes a fuel system control unit (42) configured to control a fuel pressure applied to at least one injector (18) of the engine (12) during a motoring condition period (412) based on a commanded pulse train duration (410). During the motoring condition period (412), no combustion occurs in the at least one cylinder (16) of the engine (12). The commanded pulse train duration is a time period during which the at least one injector (18) of the engine (12) is activated for a drain operation. The fuel system control unit (42) is configured to command the at least one injector (18), for the commanded pulse train duration during the motoring condition period (412), to release fuel from the at least one injector (18) without injecting the fuel into the at least one cylinder (16) of the engine (12).

公开(公告)号：US12146449B2

公开(公告)日：2024-11-19

申请号：US17909933

申请日：2021-05-06

Applicant: Cummins Inc.

Inventor： Mayur H. Borate ,  Srinivas Kumar Mulukutla ,  Shailesh Nair ,  David Michael Carey ,  Syed Shah Jalal

IPC: F02D41/22 ,  F02D41/00 ,  F02D41/40

Abstract: At least some embodiments of present disclosure direct to a fuel injection timing drift detection and/or compensation system. In some cases, the system collects or receives a series of fuel pressure data measured by one or more fuel pressure sensors. The system is configured to receive an indication of fuel flow cutout and a start-of-injection command signal. The system calculates a set of pressure drops using the series of fuel pressure data and identifies a selected pressure drop greater than a predetermined threshold to determine a measured start-of-injection timing based on the selected pressure drop. The system is further configured to evaluate whether a fuel injection drifting occurs based on received start-of-injection command signal and the measured start-of-injection timing. In some cases, the fuel injection drifting is used to either compensate fuel injection timing or raise a flag indicating the drifting.

公开(公告)号：US20210340931A1

公开(公告)日：2021-11-04

申请号：US17328790

申请日：2021-05-24

Applicant: Cummins Inc.

Inventor： David M. Carey ,  Syed Shah Jalal ,  Richard J. Dudek ,  Ulf Carlsson ,  Paul Peavler

IPC: F02D41/38 ,  F02D41/00 ,  F02D41/20

Abstract: Methods and systems, using a controller (20), for performing fuel pressure control operation of an engine (12) having at least one cylinder (16) is disclosed. The controller (20) includes a fuel system control unit (42) configured to control a fuel pressure applied to at least one injector (18) of the engine (12) during a motoring condition period (412) based on a commanded pulse train duration (410). During the motoring condition period (412), no combustion occurs in the at least one cylinder (16) of the engine (12). The commanded pulse train duration is a time period during which the at least one injector (18) of the engine (12) is activated for a drain operation. The fuel system control unit (42) is configured to command the at least one injector (18), for the commanded pulse train duration during the motoring condition period (412), to release fuel from the at least one injector (18) without injecting the fuel into the at least one cylinder (16) of the engine (12).