公开(公告)号：US10151229B2

公开(公告)日：2018-12-11

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: F01N3/00 ,  F01N3/20 ,  F01N11/00 ,  F01N9/00 ,  F01N3/035

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.

公开(公告)号：US10794253B2

公开(公告)日：2020-10-06

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：US10215072B2

公开(公告)日：2019-02-26

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 ,  F01N9/00 ,  F01N3/021

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：US09080483B2

公开(公告)日：2015-07-14

申请号：US13672135

申请日：2012-11-08

Applicant: GM Global Technology Operations LLC

Inventor： Thomas LaRose, Jr. ,  Christopher Whitt ,  Christopher C. Swoish ,  Douglas Christopher Sarsen

IPC: F01N3/00 ,  F01N3/02 ,  F01N3/10 ,  F01N3/20 ,  F01N3/025 ,  F01N9/00 ,  F01N13/00

CPC classification number: F01N3/025 ,  F01N3/0253 ,  F01N3/2066 ,  F01N9/002 ,  F01N13/009 ,  F01N2430/085 ,  F01N2610/03 ,  F01N2900/08 ,  F01N2900/1606 ,  Y02T10/24 ,  Y02T10/47

Abstract: In one exemplary embodiment of the invention, a method for controlling regeneration for an exhaust system of an internal combustion engine, wherein the exhaust system includes a particulate filter is provided, where the method includes determining a mass flow rate of oxygen received from the internal combustion engine, determining a particulate mass within the particulate filter, determining a desired particulate burn rate based on the mass flow rate of oxygen and the particulate mass and determining a current particulate burn rate. The method also includes determining a correction value based on the desired particulate burn rate and the current particulate burn rate, determining a temperature set point for exhaust gas entering the particulate filter based on the correction value, an engine speed and an engine load and communicating a signal, from a controller, to control a parameter for a regeneration system based on the determined temperature set point.

Abstract translation: 在本发明的一个示例性实施例中，提供了一种用于控制内燃机的排气系统的再生的方法，其中所述排气系统包括微粒过滤器，其中所述方法包括确定从内燃机接收的氧的质量流量 发动机，确定颗粒过滤器内的颗粒物质，基于氧气和颗粒物质的质量流率确定所需的颗粒燃烧速率并确定当前颗粒燃烧速率。 该方法还包括基于期望的颗粒燃烧速率和当前的颗粒燃烧速率来确定校正值，基于校正值，发动机转速和发动机负载来确定进入微粒过滤器的废气的温度设定点，并将 信号，从控制器，基于所确定的温度设定点来控制再生系统的参数。