公开(公告)号：US20170350340A1

公开(公告)日：2017-12-07

申请号：US15169802

申请日：2016-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Azeem Sarwar ,  Chaitanya Sankavaram ,  Ian J. Macewen ,  Steven Ward Majors ,  Scott R. Jeffrey ,  Rafat F. Hattar

IPC: F02D41/22 ,  F02D41/14 ,  F01N3/20 ,  F02D41/26 ,  F02D41/38

CPC classification number: F02D41/221 ,  F01N3/20 ,  F02D41/1454 ,  F02D41/1473 ,  F02D41/26 ,  F02D41/38 ,  F02D2041/224 ,  F02D2200/1015 ,  Y02T10/40

Abstract: An engine includes a plurality of combustion cylinders configured to burn a fuel to power the engine, and a plurality of fuel injectors. Each of the fuel injectors is arranged to distribute fuel delivered from a fuel tank to one of the plurality of combustion cylinders. The engine also includes a controller programmed to adjust a fuel trim signal gain based on sensing exhaust flow downstream of the combustion cylinders. The controller is also programmed to monitor a cumulative misfire count for each of the plurality of combustion cylinders. The controller is further programmed to issue a prognosis message identifying a state of health of at least one of the plurality of fuel injectors in response to a fuel trim signal gain exceeding an adjustment threshold and a cumulative misfire count greater than a misfire threshold.

公开(公告)号：US10167803B2

公开(公告)日：2019-01-01

申请号：US15169802

申请日：2016-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Azeem Sarwar ,  Chaitanya Sankavaram ,  Ian J. Macewen ,  Steven Ward Majors ,  Scott R. Jeffrey ,  Rafat F. Hattar

IPC: F02D41/22 ,  F01N3/20 ,  F02D41/14 ,  F02D41/26 ,  F02D41/38

Abstract: An engine includes a plurality of combustion cylinders configured to burn a fuel to power the engine, and a plurality of fuel injectors. Each of the fuel injectors is arranged to distribute fuel delivered from a fuel tank to one of the plurality of combustion cylinders. The engine also includes a controller programmed to adjust a fuel trim signal gain based on sensing exhaust flow downstream of the combustion cylinders. The controller is also programmed to monitor a cumulative misfire count for each of the plurality of combustion cylinders. The controller is further programmed to issue a prognosis message identifying a state of health of at least one of the plurality of fuel injectors in response to a fuel trim signal gain exceeding an adjustment threshold and a cumulative misfire count greater than a misfire threshold.