公开(公告)号：US10125717B2

公开(公告)日：2018-11-13

申请号：US15361814

申请日：2016-11-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Isadora Ricci ,  Giorgio Nati ,  Cosma Negro ,  Stefano Pellegrino

IPC: F02M1/00 ,  F02D41/40 ,  F02D41/02 ,  F02D41/38

Abstract: A method of operating a fuel injector of an internal combustion engine having a reciprocating piston includes performing a multi after-injection pattern having at least one pair of consecutive injection pulses both starting after a top dead center of the piston and separated by a dwell time shorter than 200 as.

公开(公告)号：US10184409B2

公开(公告)日：2019-01-22

申请号：US15377327

申请日：2016-12-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Riccardo Baria ,  Cosma Negro ,  Andres Cespedes Garcia ,  Davide Di Nunno

IPC: F02D41/00 ,  F02B37/12 ,  F01P7/16 ,  F02B47/08 ,  F02D13/02 ,  F02D21/08 ,  F02M26/02 ,  F02M26/01 ,  F02M26/06 ,  F02M26/04 ,  F02M26/00 ,  F02D41/06 ,  F02M26/05

Abstract: A method and system for operating an internal combustion engine equipped with a turbocharger and an exhaust gas recirculation pipe fluidly connecting an exhaust gas line to an air intake duct upstream of a compressor of the turbocharger is disclosed. A value of a parameter indicative of a temperature of an exhaust gas is determined, and an internal recirculation strategy of the exhaust gas is actuated if the determined value is lower than a predetermined threshold value thereof. The internal recirculation strategy includes interrupting a flowing of exhaust gas through the exhaust gas recirculation pipe, and opening an exhaust valve during an intake stroke of a piston of the internal combustion engine.