公开(公告)号：US20190383187A1

公开(公告)日：2019-12-19

申请号：US16009355

申请日：2018-06-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Douglas C. Sarsen ,  Thomas LaRose, JR. ,  Nicholas Girardi

IPC: F01N3/20 ,  F02M31/16 ,  F02M31/20 ,  F02M37/00

Abstract: A coolant control system of a vehicle includes a coolant pump that pumps coolant to a second radiator that is different than a first radiator that receives coolant from an engine of the vehicle. A diesel exhaust fluid (DEF) injector injects a DEF into an exhaust system and receives coolant output from the second radiator. A fuel heat exchanger transfers heat between coolant and fuel flowing therethrough. An engine control module is configured to determine a temperature of the DEF injector, control a duty cycle of the coolant pump, determine a vaporized condition of the coolant based on a DEF injector temperature, optionally further, in response to determining a vaporized condition of the coolant, implement a vapor purge by oscillating the duty cycle of the coolant pump, and optionally further identify a low-coolant condition of the coolant control system based on the vapor purges implemented during a time period.

公开(公告)号：US20180274421A1

公开(公告)日：2018-09-27

申请号：US15467312

申请日：2017-03-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Michael A. Smith ,  Praveen S. Chavannavar ,  Po-I Lee ,  Sarah Funk ,  Thomas LaRose, JR.

IPC: F01N3/20

CPC classification number: F01N3/2066 ,  F01N3/021 ,  F01N3/2013 ,  F01N9/00 ,  F01N2260/04 ,  F01N2570/00 ,  F01N2610/02 ,  F01N2900/1602 ,  F01N2900/1622 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/47

Abstract: Method for controlling and detecting ammonium nitrate and/or ammonium nitrite poisoning within selective catalytic reduction (SCR) devices and systems incorporating the same are provided. Methods can include detecting a SCR inlet exhaust gas NO2:NOx ratio above a poisoning NOx flux threshold, detecting a SCR temperature below a poisoning temperature threshold, and determining SCR catalyst poisoning. Methods can further include performing a SCR catalyst cleaning strategy, wherein the SCR cleaning strategy comprises heating the SCR catalyst composition to a temperature above the poisoning temperature threshold. Cleaning strategies can including utilizing a heater, implementing a post-injection, after-injection, and/or auxiliary injection engine strategy wherein the engine is configured to supply exhaust gas to the SCR. Methods can further include arresting reductant dosing, identifying an opportunistic regeneration opportunity, and/or inhibiting performance of an appurtenant oxidation catalyst subsequent to determining SCR catalyst poisoning. The SCR catalyst composition can comprise iron and/or copper.

公开(公告)号：US20180149056A1

公开(公告)日：2018-05-31

申请号：US15361730

申请日：2016-11-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas LaRose, JR. ,  Giovanni David ,  Jose Marcelino Garcia

IPC: F01N3/20 ,  F01N11/00 ,  F01N3/035

CPC classification number: F01N3/208 ,  F01N3/035 ,  F01N9/00 ,  F01N11/002 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2610/144 ,  F01N2900/0402 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1812 ,  F01N2900/1818 ,  F01N2900/1821 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method for controlling an exhaust gas treatment system is provided. The exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction device, and a reductant supply source utilizing a volumetric pump. The exhaust gas source can include an internal combustion engine (ICE), such as a gasoline or diesel ICE. The method for controlling an exhaust gas treatment system includes commanding a reductant dosing quantity, determining a volumetric pump energizing time, determining an energizing time correction, and energizing the pump. The volumetric pump can comprise pump logic, and the volumetric pump energizing time can be determined by the pump logic. The energizing time correction can be determined using a calibration table. The calibration table can prescribe an energizing time correction based on a current pump pressure and the commanded dosing quantity.