公开(公告)号：US09903319B2

公开(公告)日：2018-02-27

申请号：US15003245

申请日：2016-01-21

Applicant: GM Global Technology Operations LLC

Inventor： Davide Di Nunno ,  Manuel A. Gonzalez Delgado

IPC: F02M26/01 ,  F02D21/08 ,  F02D13/02

CPC classification number: F02M26/01 ,  F02D13/0265 ,  F02D21/08 ,  Y02T10/18

Abstract: An internal combustion engine includes a variable valvetrain system for improving the range of controllability of the internal EGR technique adjusts the internal EGR lift in a more favorable window and position compared to the internal EGR window typically utilized. In particular, a combined change of lift, phase and duration of the internal EGR lift of the exhaust vale improves the controllability and stability of the desired amount of internal EGR. The present system achieves a high internal EGR capability at low loads and lower back pressure. The system also achieves controllability of internal EGR at high loads without requiring ultra low lifts. The system also allows warm-up of the exhaust after treatment system faster for higher conversion efficiency, reduced HC and NOx engine-out emissions and increased combustion stability.

公开(公告)号：US20210156323A1

公开(公告)日：2021-05-27

申请号：US16690737

申请日：2019-11-21

Applicant: GM Global Technology Operations LLC

Inventor： Alberto Lorenzo Vassallo ,  Manuel A. Gonzalez Delgado

IPC: F02D41/00 ,  F02M26/33 ,  F01N11/00

Abstract: A method for controlling the temperature of re-circulated exhaust gas in an internal combustion engine includes operating the internal combustion engine on a base line mode, receiving a signal indicative of an engine operating temperature, wherein the engine operating temperature is one of coolant temperature, exhaust temperature and oil temperature, comparing the engine operating temperature to a predetermined IEGR threshold, when the engine operating temperature is less than the predetermined IEGR threshold, activating an IEGR mode and activating an EEVO mode, and when the engine operating temperature is greater than the first predetermined IEGR threshold, deactivating the IEGR mode and deactivating the EEVO mode.

公开(公告)号：US11236688B2

公开(公告)日：2022-02-01

申请号：US16690737

申请日：2019-11-21

Applicant: GM Global Technology Operations LLC

Inventor： Alberto Lorenzo Vassallo ,  Manuel A. Gonzalez Delgado

IPC: F01N11/00 ,  F02D41/00 ,  F02M26/33

Abstract: A method for controlling the temperature of re-circulated exhaust gas in an internal combustion engine includes operating the internal combustion engine on a base line mode, receiving a signal indicative of an engine operating temperature, wherein the engine operating temperature is one of coolant temperature, exhaust temperature and oil temperature, comparing the engine operating temperature to a predetermined IEGR threshold, when the engine operating temperature is less than the predetermined IEGR threshold, activating an IEGR mode and activating an EEVO mode, and when the engine operating temperature is greater than the first predetermined IEGR threshold, deactivating the IEGR mode and deactivating the EEVO mode.